6-K 1 d433093d6k.htm FORM 6-K

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of November 2012

Commission File Number 0-28564

QIAGEN N.V.

(Translation of registrant’s name into English)

Spoorstraat 50

5911 KJ Venlo

The Netherlands

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨ No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- .

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QIAGEN N.V.

Form 6-K

TABLE OF CONTENTS

Item

Invitation to attend the Annual General Meeting of Shareholders of QIAGEN N.V.

Notice of Annual General Meeting of Shareholders

QIAGEN N.V. Proxy Statement 2012

Attendance Form for Annual General Meeting of Shareholders

Proxy for Annual General Meeting of Shareholders

Voting Results of the 2012 Annual General Meeting of Shareholders

QIAGEN N.V. Annual Report 2011

QIAGEN N.V. IFRS Financial Reports 2011

Signatures

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DEAR SHAREHOLDER:

You are cordially invited to attend the Annual General Meeting of Shareholders of QIAGEN N.V. (the “Company”) to be held on Wednesday, June 27, 2012 at 10:30 a.m., local time, at Maaspoort, Oude Markt 30, 5911 HH Venlo, The Netherlands.

We have attached a Notice of Annual General Meeting, including the agenda and Explanatory Notes thereto, and enclosed an attendance form and proxy card for use in connection with the meeting.

We hope that you will be able to attend the Annual General Meeting. If you plan to do so, please complete and sign the enclosed attendance form and return it to American Stock Transfer and Trust Company, as specified thereon. We will then add your name to the admission list for the meeting and forward to you an entrance-ticket for the meeting. The signed attendance form must be received no later than 5 p.m. (New York time) on June 20, 2012 in order for you to attend the meeting.

Whether or not you plan to attend the Annual General Meeting, it is important that your shares are represented. Therefore, please complete, sign, date and return the enclosed proxy card promptly in the enclosed envelope, which requires no postage if mailed in the United States. The proxy card must be received no later than 5 p.m. (New York time) on June 22, 2012 for your vote to count. This will ensure your proper representation at the Annual General Meeting. If you attend the Annual General Meeting, you may vote in person if you wish, even if you have previously returned your proxy.

Sincerely,

/s/ Peer M. Schatz

PEER M. SCHATZ

Managing Director

Venlo, The Netherlands

May 14, 2012

YOUR VOTE IS IMPORTANT.

PLEASE RETURN YOUR ATTENDANCE FORM OR PROXY CARD PROMPTLY.

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QIAGEN N.V.

NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS

TO BE HELD JUNE 27, 2012

TO THE SHAREHOLDERS:

NOTICE IS HEREBY GIVEN that the Annual General Meeting of Shareholders (the “Annual General Meeting”) of QIAGEN N.V. (the “Company”), a public limited liability company organized and existing under the laws of The Netherlands, will be held on Wednesday, June 27, 2012 at 10:30 a.m., local time, at Maaspoort, Oude Markt 30, 5911 HH Venlo, The Netherlands.

The agenda of the Annual General Meeting of the Company, containing proposals of the Managing Board and the Supervisory Board of the Company, is as follows:

| 1. | Opening;

| 2. | Managing Board Report for the year ended December 31, 2011 (“Fiscal Year 2011”);

| 3. | Supervisory Board Report on the Company’s Annual Accounts (the “Annual Accounts”) for Fiscal Year 2011;

| 4. | Adoption of the Annual Accounts for Fiscal Year 2011 (voting item);

| 5. | Reservation and dividend policy;

| 6. | Discharge from liability of the Managing Directors for the performance of their duties during Fiscal Year 2011 (voting item);

| 7. | Discharge from liability of the Supervisory Directors for the performance of their duties during Fiscal Year 2011 (voting item);

| 8. | Reappointment of the following seven Supervisory Directors of the Company for a term ending on the date of the Annual General Meeting in 2013 (voting items):

| a. | Prof. Dr. Detlev Riesner;

| b. | Dr. Werner Brandt;

| c. | Dr. Metin Colpan;

| d. | Mr. Erik Hornnaess;

| e. | Prof. Dr. Manfred Karobath;

| f. | Mr. Heino von Prondzynski;

| g. | Ms. Elizabeth E. Tallett;

| 9. | Reappointment of the following three Managing Directors of the Company for a term ending on the date of the Annual General Meeting in 2013 (voting items):

| a. | Mr. Peer Schatz;

| b. | Mr. Roland Sackers;

| c. | Mr. Bernd Uder;

| 10. | Reappointment of Ernst & Young Accountants LLP as auditors of the Company for the fiscal year ending December 31, 2012 (voting item);

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| 11. | Authorization of the Supervisory Board, until December 27, 2013

| a. | to issue a number of Common Shares and financing preference shares and grant rights to subscribe for such shares, the aggregate par value of which shall be equal to the aggregate par value of all shares issued and outstanding in the capital of the Company as at December 31, 2011 as included in the Annual Accounts for Fiscal Year 2011, (voting item); and

| b. | to restrict or exclude the pre-emptive rights with respect to issuing shares or granting subscription rights, the aggregate par value of such shares or subscription rights shall be up to a maximum of 20% of the aggregate par value of all shares issued and outstanding in the capital of the Company as at December 31, 2011 (voting item).

| 12. | Authorization of the Managing Board, until December 27, 2013, to acquire shares in the Company’s own share capital (voting item);

| 13. | Questions;

| 14. | Closing.

Under the Articles of Association of the Company and Dutch law, copies of the Annual Accounts for Fiscal Year 2011, the reports of the Supervisory Board and the Managing Board, the list and biographies of binding nominees for election to the Supervisory Board and the Managing Board and the information sent to the record holders of shares in connection with the Annual General Meeting can be obtained free of charge by shareholders and other persons entitled to attend the Annual General Meeting at the offices of the Company at Spoorstraat 50, 5911 KJ Venlo, The Netherlands, and at the offices of American Stock Transfer and Trust Company at 6201 15th Avenue, Brooklyn, New York 11219, United States of America, until the close of the Annual General Meeting. Copies are also available electronically at the Investor Relations section of our website, www.qiagen.com.

In an effort to reduce our cost of printing and mailing documents for the Annual General Meeting and to exhibit environmentally responsible conduct, we are not mailing paper copies of our 2011 Annual Report to our shareholders. The 2011 Annual Report, which provides additional information regarding our 2011 financial results, and copies of the Notice of Annual General Meeting, including the agenda and Explanatory Notes thereto, and Annual Accounts for Fiscal Year 2011 can be accessed over the Internet at the Investor Relations section of our website, www.qiagen.com. Printed copies of the 2011 Annual Report can also be obtained free of charge by shareholders and other persons entitled to attend the Annual General Meeting by contacting AnnualReports.com, Internet Link: http://www.annualreports.com/Company/6666, or by contacting QIAGEN Sciences LLC., Tatjana Haddaway, 19300 Germantown Rd, Germantown, MD 20874, United States of America, Phone number: +1 240 686 7774 until the close of the Annual General Meeting.

Close of business (New York time) on Wednesday, May 30, 2012 is the record date for the determination of the record holders of shares entitled to participate in and vote at the Annual General Meeting or by proxy.

All shareholders are cordially invited to attend the Annual General Meeting. If you plan to do so, please complete and sign the enclosed attendance form and return it as specified thereon. We will then add your name to the admission list for the meeting and forward to you an entrance-ticket for the Annual General Meeting.

Whether you plan to attend the Annual General Meeting or not, you are requested to complete, sign, date and return the enclosed proxy card as soon as possible in accordance with the instructions on the card. A pre-addressed, postage prepaid return envelope is enclosed for your convenience. Completed proxy cards may also be submitted via e-mail to admin2@amstock.com.

By Order of the Managing Board

/s/ Peer M. Schatz

PEER M. SCHATZ

Managing Director

Venlo, The Netherlands

May 14, 2012

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QIAGEN N.V.

ANNUAL GENERAL MEETING OF SHAREHOLDERS

EXPLANATORY NOTES TO AGENDA

I. General

The enclosed proxy card and the accompanying Notice of Annual General Meeting of Shareholders and agenda are being mailed to shareholders of QIAGEN N.V. (the “Company”) in connection with the solicitation by the Company of proxies for use at the Annual General Meeting of Shareholders of the Company to be held on Wednesday, June 27, 2012 at 10:30 a.m., local time, at Maaspoort, Oude Markt 30, 5911 HH Venlo, The Netherlands. These proxy solicitation materials were mailed on or about May 31, 2012 to all shareholders of record as of May 30, 2012, the record date for the Annual General Meeting.

Under the Articles of Association of the Company and Dutch law, copies of the Annual Accounts for the year ended December 31, 2011 (“Fiscal Year 2011”), the reports of the Supervisory Board and the Managing Board, the list and biographies of binding nominees for election to the Supervisory Board and the Managing Board and the information sent to the record holders of shares in connection with the Annual General Meeting can be obtained free of charge by shareholders and other persons entitled to attend the Annual General Meeting at the offices of the Company at Spoorstraat 50, 5911 KJ Venlo, The Netherlands, and at the offices of American Stock Transfer and Trust Company at 6201 15th Avenue, Brooklyn, New York 11219, United States of America, until the close of the Annual General Meeting. Copies are also available electronically at the Investor Relations section of our website, www.qiagen.com.

In an effort to reduce our cost of printing and mailing documents for the Annual General Meeting and to exhibit environmentally responsible conduct, we are not mailing paper copies of our 2011 Annual Report to our shareholders. The 2011 Annual Report, which provides additional information regarding our 2011 financial results, and copies of the Notice of Annual General Meeting, including the agenda and Explanatory Notes thereto, and Annual Accounts for Fiscal Year 2011 can be accessed over the Internet at the Investor Relations section of our website, www.qiagen.com. Printed copies of the 2011 Annual Report can also be obtained free of charge by shareholders and other persons entitled to attend the Annual General Meeting by contacting AnnualReports.com, Internet Link: http://www.annualreports.com/Company/6666, or by contacting QIAGEN Sciences LLC., Tatjana Haddaway, 19300 Germantown Rd, Germantown, MD 20874, United States of America, Phone number: +1 240 686 7774 until the close of the Annual General Meeting. Completed proxy cards may also be submitted via e-mail to admin2@amstock.com.

The reasonable cost of soliciting proxies, including expenses in connection with preparing and mailing the proxy solicitation materials, will be borne by the Company. In addition, the Company will reimburse brokerage firms and other persons representing beneficial owners of Common Shares for their expenses in forwarding proxy materials to such beneficial owners. Solicitation of proxies by mail may be supplemented by telephone, telegram, telex, electronic mail and personal solicitation by directors, officers or employees of the Company. No additional compensation will be paid for such solicitation.

The Company is not subject to the proxy solicitation rules contained in Regulation 14A promulgated under the United States Securities Exchange Act of 1934, as amended.

II. Voting and Solicitation

In order to attend, address and vote at the Annual General Meeting, or vote by proxy, the record holders of shares are requested to advise the Company in writing in accordance with the procedures set forth in the Notice

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of Annual General Meeting of Shareholders. Close of business (New York time) on Wednesday, May 30, 2012 is the record date for the determination of the record holders of shares entitled to participate in and vote at the Annual General Meeting or by proxy.

As of May 10, 2012, there were 235,540,699 Common Shares outstanding. Shareholders are entitled to one vote for each Common Share held. The proposal to authorize the Supervisory Board restrict or exclude the pre-emptive rights with respect to issuing shares or granting subscription rights set forth under Item 11b of the agenda shall be validly adopted if adopted by a majority of at least two-thirds of the votes cast at the Annual General Meeting if less than fifty percent (50%) of the Company’s issued share capital is present or represented at the Annual General Meeting. If fifty percent (50%) or more of the Company’s issued share capital is present or represented at the Annual General Meeting, the proposal set forth under Item 11b of the agenda shall be validly adopted if adopted by a simple majority of the votes cast at the Annual General Meeting. All other proposals presented to the shareholders at the Annual General Meeting shall be validly adopted if adopted by a simple majority of the votes cast at the Annual General Meeting.

Any proxy given pursuant to this solicitation may be revoked by the person giving it at any time before its use by delivery to the Company of a written notice of revocation or a duly executed proxy bearing a later date. Any shareholder who has executed a proxy but is present at the Annual General Meeting, and who wishes to vote in person, may do so by revoking his or her proxy as described in the preceding sentence. Mere attendance at the Annual General Meeting will not serve to revoke a proxy. Shares represented by valid proxies received in time for use at the Annual General Meeting and not revoked at or prior to the Annual General Meeting, will be voted at the Annual General Meeting.

III. Explanatory Notes to Agenda Items

Explanatory Note to Item 2—Managing Board Report for Fiscal Year 2011

At the Annual General Meeting, the Managing Board will conduct a presentation on the performance of the Company during Fiscal Year 2011. Following the presentation, shareholders will be invited to discuss and ask questions about the Company’s performance.

Explanatory Note to Item 3—Supervisory Board Report on the Company’s Annual Accounts for Fiscal Year 2011

At the Annual General Meeting, the Supervisory Board will conduct a presentation of its report on the Company’s Annual Accounts for Fiscal Year 2011. Following the presentation, shareholders will be invited to discuss and ask question about the Annual Accounts.

Explanatory Note to Item 4 —Adoption of the Annual Accounts

The shareholders of the Company are being asked to adopt the Annual Accounts for Fiscal Year 2011. The Annual Report and the Annual Accounts have been prepared by the Managing Board and approved by the Supervisory Board of the Company.

Under the Articles of Association of the Company and Dutch law, copies of the Annual Accounts for Fiscal Year 2011 and the reports of the Supervisory Board and the Managing Board can be obtained free of charge by shareholders and other persons entitled to attend the Annual General Meeting at the offices of the Company at Spoorstraat 50, 5911 KJ Venlo, The Netherlands, and at the offices of American Stock Transfer and Trust Company at 6201 15th Avenue, Brooklyn, New York 11219, United States of America, until the close of the Annual General Meeting. Copies are also available electronically at the Investor Relations section of our website, www.qiagen.com.

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THE SUPERVISORY BOARD AND THE MANAGING BOARD UNANIMOUSLY RECOMMEND A VOTE FOR THIS ITEM. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

Explanatory Note to Item 5—Reservation and Dividend Policy

The Company’s reservation and dividend policy is to retain the profits by way of reserve, as is common among fast growing companies with significant future expansion potential in rapidly developing fields. Consequently, the Company will not pay a dividend to the shareholders out of the Fiscal Year 2011 profits. This policy benefits our shareholders by increasing share value, and the Company believes that this policy is aligned with shareholders’ taxation preferences.

Explanatory Note to Item 6—Discharge from Liability of the Managing Directors

Under Dutch law, the adoption of the Annual Accounts does not automatically discharge the members of the Managing Board and the Supervisory Board from liability for the performance of their duties during Fiscal Year 2011. The grant of such discharge from liability is typical for Dutch companies, and its approval is commonly included on the agenda for annual general meetings.

The shareholders of the Company are being asked to approve a discharge from liability of the members of the Managing Board for the performance of their duties during Fiscal Year 2011, as described in the 2011 Annual Report and the 2011 Annual Accounts or as otherwise disclosed to the General Meeting of Shareholders.

THE SUPERVISORY BOARD AND THE MANAGING BOARD UNANIMOUSLY RECOMMEND A VOTE FOR THIS ITEM. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

Explanatory Note to Item 7 —Discharge from Liability of the Supervisory Directors

The shareholders of the Company are being asked to approve a discharge from liability of the members of the Supervisory Board for the performance of their duties during Fiscal Year 2011, as described in the 2011 Annual Report and the 2011 Annual Accounts or as otherwise disclosed to the General Meeting of Shareholders.

THE SUPERVISORY BOARD AND THE MANAGING BOARD UNANIMOUSLY RECOMMEND A VOTE FOR THIS ITEM. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

Explanatory Note to Items 8 and 9—Reappointment of the Supervisory Directors and the Managing Directors

The Supervisory Board and the Managing Board acting together at a joint meeting (the “Joint Meeting”) resolved to make a binding nomination for the re-election of all current members of the Supervisory Board and three of the current members of the Managing Board. Dr. Schorr is not standing for re-election to the Managing Board.

The Supervisory Board consists of such number of members, with a minimum of three members, as the Joint Meeting thereof may determine. The Supervisory Board presently consists of seven members. The Joint Meeting has set the number of members of the Supervisory Board at seven as of the date of the Annual General Meeting. The Supervisory Directors are elected by a vote of the shareholders of the Company at the Annual General Meeting, subject to the authority of the Supervisory Board to appoint up to one-third of its members if vacancies occur during a fiscal year. The Managing Board has one or more members as determined by the

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Supervisory Board. The Managing Board presently consists of four members, but will consist of three members after the Annual General Meeting because Dr. Schorr is not standing for re-election to the Managing Board. Managing Directors are appointed by a vote of the shareholders of the Company at the Annual General Meeting. The Supervisory Board and the Managing Board at the Joint Meeting may make a binding nomination to fill each vacancy on the Supervisory Board and Managing Board. At the Annual General Meeting, the shareholders may overrule the binding nature of a nomination by resolution adopted with a majority of at least two-thirds of the votes cast, if such majority represents more than half the issued share capital of the Company as of the date of the Annual General Meeting. Our shareholders vote for each nominee for appointment to our Supervisory Board and Managing Board individually.

Supervisory Directors and Managing Directors are appointed annually for a period beginning on the date following the Annual General Meeting up to and including the date of the Annual General Meeting held in the following fiscal year.

By unanimous written consent dated April 19, 2012, the Joint Meeting resolved to make a binding nomination for seven members of the Supervisory Board and three members of the Managing Board. The seven binding nominees for election to the Supervisory Board positions are as follows, each nominee listed under “a” below has been proposed for re-election:

| • |  | Nominations for position no. 1: a. Prof. Dr. Detlev H. Riesner and b. Dr. Werner Brandt;

| • |  | Nominations for position no. 2: a. Dr. Werner Brandt and b. Dr. Metin Colpan;

| • |  | Nominations for position no. 3: a. Dr. Metin Colpan and b. Mr. Erik Hornnaess;

| • |  | Nominations for position no. 4: a. Mr. Erik Hornnaess and b. Prof. Dr. Manfred Karobath;

| • |  | Nominations for position no. 5: a. Prof. Dr. Manfred Karobath and b. Mr. Heino von Prondzynski;

| • |  | Nominations for position no. 6: a. Mr. Heino von Prondzynski and b. Ms. Elizabeth E. Tallett; and

| • |  | Nominations for position no. 7: a. Ms. Elizabeth E. Tallett and b. Dr. Philipp von Hugo.

The Supervisory Board believes that these nominees meet the criteria for Supervisory Board positions, as approved by the Supervisory Board and set forth on the Company’s website, and that they will make significant contributions to the Supervisory Board in view of their broad international, financial and management experience, integrity and ethics. The experience and qualifications of each nominee to the Supervisory Board are described below.

The binding nominations for each of the three Managing Board positions are as follows, each nominee listed under “a” below has been proposed for re-election:

| • |  | Nominations for position no. 1: a. Mr. Peer M. Schatz and b. Mr. Roland Sackers;

| • |  | Nominations for position no. 2: a. Mr. Roland Sackers and b. Mr. Bernd Uder;

| • |  | Nominations for position no. 3: a. Mr. Bernd Uder and b. Ms. Birgit Bergfried.

The following is a brief summary of the background of each of the Supervisory Director and Managing Director nominees. References to “QIAGEN” and the “Company” in relation to periods prior to April 29, 1996 mean QIAGEN GmbH and its consolidated subsidiaries:

Professor Dr. Detlev H. Riesner, 70, is a co-founder of the Company. He has been a member of the Supervisory Board since 1996 and was appointed Chairman of the Supervisory Board in 1999, and in 2005, he was also appointed Chairman of the Selection and Appointment Committee. Professor Riesner has held the Chair of Biophysics at the Heinrich-Heine-University in Düsseldorf since 1980 and retired in 2006. He has held the position of Dean of the Science Faculty (1991-92), Vice President of the University (Research) (1996-99) and

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Director of Technology (1999-2006). In 2007, he became a member of the University’s board of trustees. Prior to that, he was Professor of Biophysical Chemistry at the Darmstadt Institute of Technology and, from 1975 to 1977, Lecturer of Biophysical Chemistry at Hannover Medical School. He has held guest professorships at the Institute of Microbiology, Academia Sinica, Beijing, and the Department of Neurology at the University of California, San Francisco. He received his M.S. in Physics from Hannover Institute of Technology and his Ph.D. from the University of Braunschweig, with post-graduate work at Princeton University. Professor Riesner is either a member of the Supervisory Board or a director of AC Immune S.A., Lausanne, Algiax Pharmaceuticals GmbH (former Spinal Cord Therapeutics), Erkrath, Evocatal GmbH, Düsseldorf, DRK Blutspendedienst West GmbH, Hagen and DIWA GmbH, Düsseldorf. His memberships in the advisory boards of NewLab Bioquality AG and Direvo AG ended when the companies were sold in 2006. Professor Riesner is also a member of the scientific advisory boards of PrioNet, Canada, and Alberta Prion Research Institute, Canada.

Dr. Werner Brandt, 58, joined the Company’s Supervisory Board in 2007. In the same year, he was appointed Chairman of the Audit Committee. Dr. Brandt has been a member of the Executive Board and the Chief Financial Officer of SAP AG since 2001. From 1999 to 2001, he was a member of the Executive Board and Chief Financial Officer of the German-American healthcare company, Fresenius Medical Care AG, where he also served as Labor Relations Director. From 1992 to 1999, Dr. Brandt was a member of the Managing Board of Baxter Deutschland GmbH and Vice President for European Operations. In this capacity, he was responsible for Baxter’s financial operations in Europe. Dr. Brandt began his career in 1981 at the former Price Waterhouse GmbH (now PricewaterhouseCoopers) in Frankfurt. Dr. Brandt completed his Doctorate in business administration from the Technical University of Darmstadt, Germany in 1991, after studying business administration at the University of Nuremberg-Erlangen, Germany from 1976 to 1981. Dr. Brandt is currently a member of the Supervisory Board of Deutsche Lufthansa AG.

Dr. Metin Colpan, 57, is a co-founder of the Company and was Chief Executive Officer and a Managing Director from 1985 through 2003. Dr. Colpan has been a member of the Supervisory Board since 2004. Dr. Colpan obtained his Ph.D. and M.S. in Organic Chemistry and Chemical Engineering from the Darmstadt Institute of Technology in 1983. Prior to founding QIAGEN, Dr. Colpan was an Assistant Investigator at the Institute for Biophysics at the University of Düsseldorf. Dr. Colpan has had wide experience in separation techniques, and in the separation and purification of nucleic acids in particular, and has filed many patents in the field. Dr. Colpan currently serves as a Supervisory Board member of Morphosys AG, Munich, Germany and Qalovis Farmer Automatic Energy GmbH, Laer, Germany. Dr. Colpan previously served as a Supervisory Board member of Ingenium Pharmaceuticals AG, GenPat77 Pharmacogenetics AG and GPC Biotech AG, each in Munich, Germany.

Erik Hornnaess, 74, has been a member of the Supervisory Board since 1998. He joined the Audit Committee in 2002, the Compensation Committee in 2005 and the Selection and Appointment Committee in 2007. He was appointed Deputy Chairman of the Supervisory Board in 2007. Mr. Hornnaess worked for Astra Pharmaceuticals, Sweden from 1965 until 1979 in various management positions in Sweden, Australia, and Canada and, for the last three years of this period, as the General Manager for the Benelux region (Belgium, The Netherlands and Luxembourg). In 1979, he joined Abbott Laboratories European Headquarters in Paris, France, and from 1982, he was the Area Vice-President of Abbott Diagnostic Division in Europe, Middle-East and Africa, with headquarters in Wiesbaden, Germany. Mr. Hornnaess retired from Abbott Laboratories on March 1, 1997. Additionally, Mr. Hornnaess served as the Vice-President of European Diagnostic Manufacturers Association (EDMA), Brussels in the period 1995 through 1997. Mr. Hornnaess graduated from Aarhus Handelshojskole, Denmark with an M.B.A. and obtained a P.M.D. from the Harvard Business School.

Professor Dr. Manfred Karobath, 71, has been a member of the Supervisory Board since 2000 and joined the Compensation Committee in 2005. Prof. Dr. Karobath studied medicine, and from 1967 to 1980, he worked first in the Dept. of Biochemistry of the University of Vienna and, after a stage as postdoctoral fellow, he joined the Dept. of Psychiatry where he became Professor of Biological Psychiatry. In 1980, he joined Sandoz Pharma in Basel, first, in drug discovery, and later, he became Senior Vice President and head of R&D. In 1992, Prof.

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Dr. Karobath joined Rhone Poulenc Rorer (“RPR”) as President of R&D and Executive Vice President, and later, he became a member of the boards of directors of RPR, Pasteur Mérieux Connought, Centeon and Rhone Poulenc Pharma. He has received several scientific awards and has published 92 scientific papers.

Heino von Prondzynski, 62, joined the Company’s Supervisory Board as well as the Audit Committee in 2007. Mr. von Prondzynski retired in 2005 from Roche where he served as Chief Executive Officer of Roche Diagnostics and a member of the Executive Committee of the Roche Group. Prior to joining Roche in 2000, Mr. von Prondzynski worked at Chiron, first as General Manager and Chief Executive Officer in Germany and Italy, later as President of the Vaccines Division in Emeryville, USA. Mr. von Prondzynski started his career with Bayer in Germany as a sales representative and later worked in Austria and Brazil as General Manager. He studied mathematics, geography and history at Westfälische Wilhelms University of Münster in Germany. Mr. von Prondzynski is a director of Koninklijke Philips Electronics NV, Hospira, Inc., and HTL Strefa. Mr. von Prondzynski was previously a director of Epigenomics AG and Chairman of Nobel Biocare Holding AG.

Elizabeth E. Tallett, 63, joined the Company’s Supervisory Board as well as the Audit Committee and Compensation Committee in 2011. Ms. Tallett has been a Principal of Hunter Partners, LLC, a management company for early to mid-stage pharmaceutical, biotechnology and medical device companies, since 2002. Her senior management experience includes President and CEO of Transcell Technologies Inc., President of Centocor Pharmaceuticals, member of the Parke-Davis Executive Committee, and Director of Worldwide Strategic Planning for Warner-Lambert Company. Ms. Tallett graduated from Nottingham University, England with dual Bachelor’s degrees with honors in mathematics and economics. She is a member of the board of directors of Principal Financial Group, Inc., Coventry Health Care, Inc., Meredith Corp. and IntegraMed America, Inc. Ms. Tallett is currently the Lead Director for both Principal and Coventry Health Care. She was also a director of Varian, Inc., Immunicon, Inc. and Varian Semiconductor Equipment Associates, Inc. at times during the past five years. Ms. Tallett was a founding board member of the Biotechnology Council of New Jersey and is a Trustee of Solebury School in Pennsylvania.

Dr. Philipp von Hugo, 45, joined the Company in 2003. Dr. von Hugo is the Head of Global Legal Affairs of the Company. He holds a law degree from the University of Hamburg and a doctorate degree from the University of Kiel.

Peer M. Schatz, 46, joined the Company in 1993 and has been Chief Executive Officer since January 1, 2004. Between 1993 and 2003, he was Chief Financial Officer and became a member of the Managing Board in 1998. Mr. Schatz was previously a partner in a private management buyout group in Switzerland and worked in finance and systems positions in Sandoz, Ltd. and Computerland AG, as well as in finance, operations, management and sales positions in various start-up companies in the computer and software trading industry in Europe and the United States. Mr. Schatz graduated from the University of St. Gallen, Switzerland, with a Master’s degree in Finance in 1989 and obtained an M.B.A. in Finance from the University of Chicago Graduate School of Business in 1991. Until 2008, Mr. Schatz was a member of the Supervisory Board of Evotec AG. He serves as a member of the Managing Board of PMS Asset Management GmbH. Mr. Schatz also previously served as a member of the German Corporate Governance Commission from 2002 to January 2012. He is also chairman of the board of directors of Ipsogen S.A., which is a majority-owned subsidiary of the Company that was acquired in 2011.

Roland Sackers, 43, joined the Company in 1999 as Vice President Finance and has been Chief Financial Officer since 2004. In 2006, Mr. Sackers became a member of the Managing Board. Between 1995 and 1999, he served as an auditor with Arthur Andersen Wirtschaftsprüfungsgesellschaft Steuerberatungsgesellschaft. Mr. Sackers earned his Diplom-Kaufmann from the Westfälische Wilhelms-Universität Münster, Germany after studying business administration. Until 2006, he was a member of the Supervisory Board and Audit Committee of IBS AG. Mr. Sackers was also a member of the board of directors of Operon Biotechnologies, Inc. until December 2007. Mr. Sackers is a board member of the industry association BIO Deutschland. He is also a non-executive director and chair of the audit committee of Immunodiagnostic Systems Holding (IDS), a leading

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producer of immunological tests for research and diagnostic applications publicly listed in the United Kingdom, as well as member of the board of directors and head of the audit committee of Ipsogen S.A., which is a majority-owned subsidiary of the Company that was acquired in 2011.

Bernd Uder, 54, joined the Company in 2001 as Vice President Sales & Marketing and became a member of the Managing Board and Senior Vice President Sales & Marketing in 2004. In 2005, Mr. Uder became Senior Vice President Global Sales and Service Solutions. Before joining the Company, Mr. Uder gained wide experience in building up and coordinating world-wide distribution networks as Vice President European Biolab Sales & Marketing with Pharmacia and Vice President global e-business with Amersham Pharmacia Biotech.

Birgit Bergfried, 46, joined the Company in 1997 as Managing Administrator. Ms. Bergfried holds a degree in economics from the University of Applied Sciences in Aachen.

Information concerning the ownership of Common Shares of each nominee to the Supervisory Board can be obtained free of charge by shareholders and other persons entitled to attend the Annual General Meeting at the offices of the Company at Spoorstraat 50, 5911 KJ Venlo, The Netherlands, and at the offices of American Stock Transfer and Trust Company at 6201 15th Avenue, Brooklyn, New York 11219, United States of America, until the close of the Annual General Meeting. The Dutch Authority of Financial Markets (“AFM”) maintains a public database of notifications regarding share holdings and voting rights of directors on its website. This database includes all notifications made by the current members of the Supervisory Board regarding their holdings of Common Shares and related voting rights. The database can be accessed through an Internet link on our website, www.qiagen.com.

THE SUPERVISORY BOARD AND THE MANAGING BOARD ACTING TOGETHER AT THE JOINT MEETING UNANIMOUSLY RECOMMEND THE REAPPOINTMENT OF EACH PROPOSED NOMINEE TO THE SUPERVISORY BOARD AND THE MANAGING BOARD. EACH NOMINEE LISTED UNDER “A” IN THE NOMINATIONS ABOVE HAS BEEN PROPOSED FOR REAPPOINTMENT. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

Explanatory Note to Item 10—Reappointment of Auditors

On April 19, 2012, the Supervisory Board approved a resolution to propose to the shareholders of the Company at the Annual General Meeting, and hereby does so propose, the reappointment of Ernst & Young Accountants LLP to audit the financial statements of the Company for the fiscal year ending December 31, 2012. Ernst & Young Accountants LLP audited the Company’s financial statements for Fiscal Year 2011.

THE SUPERVISORY BOARD AND THE MANAGING BOARD UNANIMOUSLY RECOMMEND A VOTE FOR THIS ITEM. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

Explanatory Note to Item 11—Extension of Certain Powers of the Supervisory Board

In our general meeting of shareholders held on July 20, 2007, the Supervisory Board has been designated for a period of five years to issue shares and grant rights to subscribe for shares in the amount of the Company’s authorized share capital. This designation also entails the authority to limit or exclude pre-emptive rights in connection with the issuance of shares.

The Managing Board and the Supervisory Board consider it in the best interest of the Company and its shareholders to be able to react timely when strategic business opportunities that require issuance of our shares arise. For example, in the past, this designation has been used in conducting acquisitions and in relation to the

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issuance of convertible bonds because of the short window of opportunity for completing such transactions to maximize shareholder value. Our ability to pursue strategic business opportunities that require issuance of our shares may be limited if we are required to obtain prior shareholder resolution to issue shares and/or exclude the shareholders’ pre-emptive rights.

Therefore, the Managing Board and the Supervisory Board believe that it would be in the best interest of the shareholders to grant to the Supervisory Board the authority to issue shares, when such occasions occur, and to exclude the pre-emptive rights in situations where it is imperative to be able to act quickly, without having to obtain prior shareholder approval at an extraordinary general meeting of shareholders, which would delay the transaction and may create disrupting market speculations.

In the event of any transaction, however, which has a material impact on the identity and nature of the Company, the Managing Board shall (as a matter of Dutch law) obtain prior shareholder approval despite the authorization of the Supervisory Board to issue shares as described herein.

Therefore, it is proposed to renew the current authorization of the Supervisory Board. As the current authorization covers the Company’s authorized share capital, we are asking our shareholders for an authorization to issue a number of Common Shares and financing preference shares and grant rights to subscribe for such shares, the aggregate par value of which shall be equal to the aggregate par value of all shares issued and outstanding in the capital of the Company as at December 31, 2011 as included in the Annual Accounts for Fiscal Year 2011.

In connection with the authorization of the Supervisory Board to issue shares and grant rights to subscribe for shares (Item 11a), we propose to also authorize the Supervisory Board to exclude or limit the pre-emptive rights relating to Common Shares to be issued or rights to subscribe for such shares to be granted under such authorization, the aggregate par value of such shares shall be up to a maximum of 20% of the aggregate par value of all shares issued and outstanding in the capital of the Company as at December 31, 2011 as included in the Annual Accounts for Fiscal Year 2011 (Item 11b).

This authorization covers a period of 18 months from the date of the 2012 Annual General Meeting, or until December 27, 2013.

According to the Company’s Articles of Association, the proposal set forth under Item 11a may be adopted by an affirmative vote of a simple majority of the votes cast by the shareholders present or represented at the Annual General Meeting. The proposal set forth under Item 11b would require the affirmative vote of two-thirds of the votes cast at the Annual General Meeting if less than fifty percent (50%) of the Company’s issued share capital is present or represented at the Annual General Meeting. If fifty percent (50%) or more of the Company’s issued share capital is present or represented at the Annual General Meeting, the proposal set forth under Items 11b shall be validly adopted if adopted by a simple majority of the votes cast at the Annual General Meeting.

THE SUPERVISORY BOARD AND THE MANAGING BOARD UNANIMOUSLY RECOMMEND A VOTE FOR THIS ITEM. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

Explanatory Note to Item 12—Extension of Certain Powers of the Managing Board

Pursuant to Article 6 of the Company’s Articles of Association, the Managing Board shall have the power to acquire shares in the Company’s own share capital, if and in so far as the Managing Board has been designated by the General Meeting of Shareholders for this purpose. The grant of such power to the Managing Board is typical for Dutch companies, and its approval is commonly included by such companies on the agenda for annual general meetings.

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On June 30, 2011, the Managing Board was authorized at the Annual General Meeting to exercise the powers set forth in the above paragraph, without limitation against a price between one Euro cent (Euro 0.01) and one hundred and ten percent (110%) of the average closing price of the Common Shares on the NASDAQ Global Select Market for the five trading days prior to the day of purchase or, with respect to preference and finance preference shares, against a price between one Euro cent (Euro 0.01) and three times the issuance price. This authorization is valid up to and including December 30, 2012. At the 2012 Annual General Meeting, the shareholders are being asked to extend this authorization up to and including December 27, 2013.

The purpose of this proposal is to give the Managing Board, subject to approval of the Supervisory Board, the flexibility, for a period of 18 months from the date of the 2012 Annual General Meeting, or until December 27, 2013, to acquire shares in the Company’s own share capital for general corporate purposes. The shares may be acquired through the stock markets or otherwise, against a price between one Euro cent (Euro 0.01) and one hundred and ten percent (110%) of the higher of the average closing price of the Common Shares on the NASDAQ Global Select Market or, as applicable, the Frankfurt Stock Exchange, for the five trading days prior to the day of purchase or, with respect to preference and finance preference shares, against a price between one Euro cent (Euro 0.01) and three times the issuance price. The power to repurchase shares provides the Managing Board with flexibility and allows the Managing Board to return capital to the Company’s shareholders by repurchasing shares. In addition to being a means to return value to shareholders, repurchases of shares in a company’s own share capital could be used to streamline its investor base, demonstrate a commitment to the business and confidence in the long-term growth of a company, provide increased liquidity for investors and cover obligations under the Company’s share-based compensation plans.

This proposal is made in accordance with the Company’s Articles of Association and the provisions of Section 2:98 of the Dutch Civil Code. The Company’s Articles of Association and the Dutch Civil Code allow for the authorization of the Managing Board to purchase a number of shares equal to up to 50% of the Company’s issued share capital on the date of acquisition. However, we are asking our shareholders to authorize the Managing Board to acquire the number of shares up to a maximum of 10% of the Company’s issued share capital on the date of acquisition, and provided that the Company or any subsidiary of the Company shall not hold more than 10% of the Company’s issued share capital at any time.

THE SUPERVISORY BOARD AND THE MANAGING BOARD UNANIMOUSLY RECOMMEND A VOTE FOR THIS ITEM. THE ACCOMPANYING PROXY WILL BE VOTED IN FAVOR THEREOF UNLESS INSTRUCTIONS ARE OTHERWISE PROVIDED.

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COMMITTEES OF THE SUPERVISORY BOARD, MEETINGS AND

SHAREHOLDER COMMUNICATIONS TO THE BOARD

Meeting Attendance. During Fiscal Year 2011, there were nine (9) meetings of the Supervisory Board, and the various committees of the Supervisory Board met a total of twenty one (21) times. No supervisory director attended fewer than 75% of the total number of meetings of the Supervisory Board and of committees of the Supervisory Board on which he served during Fiscal Year 2011. The Board has adopted a policy under which the Chairman of the Supervisory Board and all members of the Managing Board attend each Annual General Meeting of shareholders, and all other members of the Supervisory Board are encouraged to attend each Annual General Meeting.

Committees of the Supervisory Board. The Supervisory Board has established an Audit Committee, a Compensation Committee and a Selection and Appointment Committee, which are comprised of the following members:

Name of Supervisory Director |  | Independent |  | Member of Audit Committee |  | Member of Compensation Committee |  | Member of Selection and Appointment Committee
Prof. Dr. Detlev Riesner |  | ü |  |  |  |  |  | ü (Chairman)
Dr. Werner Brandt |  | ü |  | ü (Chairman) |  |  |  |
Erik Hornnaess |  | ü |  | ü |  | ü (Chairman) |  | ü
Prof. Dr. Manfred Karobath |  | ü |  |  |  | ü |  |
Heino von Prondzynski |  | ü |  |  |  |  |  |
Elizabeth A. Tallett |  | ü |  | ü |  | ü |  |

We believe that all of our Supervisory Directors, except for Dr. Metin Colpan, meet the independence requirements set forth in the NASDAQ Stock Market rules. Pursuant to the NASDAQ rules, a majority of the Supervisory Directors must qualify as independent, as defined in the rules. In addition, pursuant to the Dutch Corporate Governance Code, no more than one Supervisory Director could fail to qualify as independent, as defined in the Code. Presently, Dr. Colpan is not considered to be independent due to his consulting arrangement with the Company under which Dr. Colpan provided scientific advisory services to the Company. In January 2012, the agreement under which Dr. Colpan provided scientific consulting services terminated. Dr. Colpan does not serve on any committees of the Supervisory Board.

Audit Committee. The Audit Committee, which met six (6) times in Fiscal Year 2011, operates pursuant to a charter approved by the Supervisory Board and available online at www.qiagen.com. The Audit Committee consists of three members, Dr. Brandt (Chairman), Mr. Hornnaess and Ms. Tallett, and meets at least quarterly. The Audit Committee members are appointed by the Supervisory Board and serve for a term of one year. We believe that all members of our Audit Committee meet the independence requirements as set forth in Rule 10A-3 of the Securities Exchange Act of 1934, as amended, and the NASDAQ rules. The Audit Committee reviews major financial risk exposures, pre-approves related-party transactions, and reviews any legal matter that could have a significant impact on the Company’s financial statements. Further, the Audit Committee is responsible for establishing complaint procedures, including those for confidential, anonymous submission by employees of concerns regarding the receipt, retention and treatment of complaints received regarding accounting, internal accounting controls, or auditing matters. The Audit Committee is also responsible, together with the Managing Board, for the proposal of the independent registered public accounting firm to the Supervisory Board, which proposes the appointment of the independent registered public accounting firm to the General Meeting of Shareholders. The independent registered public accounting firm audits the consolidated financial statements and

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certain local books and records of QIAGEN and its subsidiaries, and the Audit Committee is further responsible for pre-approving the fees for such services. Additionally, the Audit Committee reviews the performance of the independent registered public accounting firm with management, discussing on a quarterly basis the scope and results of the reviews and audits with the independent registered public accounting firm; discusses our financial accounting and reporting principles and policies and the adequacy of our internal accounting, financial and operating controls and procedures with the independent registered public accounting firm and management; considers and approves any recommendations regarding changes to our accounting policies and processes; reviews with management and the independent registered public accounting firm our quarterly earnings reports prior to their release to the press; and reviews the quarterly and annual reports (reported on Forms 6-K and 20-F) to be furnished to or filed with the Securities and Exchange Commission and the Deutsche Boerse. The Board has designated Dr. Brandt as an “audit committee financial expert” as that term is defined in the United States Securities and Exchange Commission rules adopted pursuant to the Sarbanes-Oxley Act of 2002.

Compensation Committee. The Compensation Committee, which met twelve (12) times in Fiscal Year 2011, operates pursuant to a charter approved by the Supervisory Board and available online at www.qiagen.com. The Compensation Committee consists of three members, Mr. Erik Hornnaess (Chairman), Prof. Dr. Manfred Karobath and Ms. Tallett. Members are appointed by the Supervisory Board and serve for a term of one year. We believe that all of the members of the Compensation Committee meet the independence requirements set forth in the NASDAQ rules. The Compensation Committee reviews and approves all equity-based compensation, reviews and approves the annual salaries, bonuses and other benefits of executive officers, and reviews general policies relating to employee compensation and benefits.

Selection and Appointment Committee. The Selection and Appointment Committee, which met three (3) times in Fiscal Year 2011, operates pursuant to a charter approved by the Supervisory Board and available online at www.qiagen.com. The current members of the Selection and Appointment Committee are Prof. Dr. Detlev H. Riesner (Chairman) and Mr. Erik Hornnaess. Members are appointed by the Supervisory Board and serve for a term of one year. The Selection and Appointment Committee prepares the selection criteria and appointment procedures for members of our Supervisory Board and Managing Board, periodically evaluates the scope and composition of the Managing Board and Supervisory Board and proposes the profile of the Supervisory Board in relation thereto. Additionally, the Committee periodically evaluates the functioning of individual members of the Managing Board and Supervisory Board and reports the results thereof to the Supervisory Board and proposes the (re-)appointments of members of our Managing Board and Supervisory Board. The Committee prepares and submits to the Supervisory Board on an annual basis a report of its deliberations and findings.

Shareholder Communications to the Board. Generally, shareholders who have questions or concerns should contact our Investor Relations department at +49-2103-29-11709. However, any shareholders who wish to address questions regarding our business directly with the Supervisory Board, or any individual Supervisory Director, should direct questions in writing to the Chairman of the Board, Prof. Dr. Detlev Riesner, at QIAGEN N.V., Spoorstraat 50, 5911 KJ Venlo, The Netherlands.

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ADDITIONAL INFORMATION REGARDING COMPENSATION OF MANAGING DIRECTORS

The objective of QIAGEN’s remuneration policy is to achieve a total remuneration level, both short-term and long-term, that is comparable with levels provided by other European and United States companies of similar size and complexity in a similar industry. The level and structure of remuneration was determined in light of, among other things, the business and financial results, strategic position, share price performance and other developments relevant to QIAGEN. Independent external compensation surveys have been taken into account in determining the appropriate remuneration levels for the members of the Managing Board. Further, the Supervisory Board analyzed potential outcomes of the variable components of remuneration of the members of the Managing Board and considered the effect of these components on the total remuneration of the members of the Managing Board.

Compensation of the members of the Managing Board was within the compensation ranges set forth in the remuneration policy adopted by the General Meeting of Shareholders in 2005 and consisted of a fixed salary and other variable components. Variable compensation included one-time and annual payments linked to pre-determined targets which include business performance goals, strategic objectives and long term value creation targets, as well as long-term incentives containing risk elements, such as stock options or other equity-based compensation, as well as pension plans. The variable part of the compensation was designed to strengthen the Managing Board members’ commitment to QIAGEN’s objectives.

To ensure overall competitiveness of the remuneration provided to the Managing Board, the Compensation Committee assessed the remuneration levels of the Managing Board members against those at other companies of similar size and complexity in similar industries (biotechnology, life sciences supplies, diagnostics and pharmaceuticals) in Europe and the United States, and German companies listed on the MDAX and TecDAX.

Each annual bonus was determined in accordance with QIAGEN’s global bonus scheme, which is applicable to management and certain employees of QIAGEN and its affiliates. Each bonus award was based on overall financial goals of QIAGEN, as well as on the achievement of individual pre-defined and value creating performance goals by each Managing Board member of each Managing Board member and the performance of the department the respective Managing Board member is responsible for. Financial targets were based on net sales and operating income, adjusted for the impact of transactions, such as acquisitions. These targets were agreed upon by the Supervisory Board. Due to commercial and competitive considerations, QIAGEN does not publish the agreed upon targets. Bonus payments made to the members of the Managing Board are set forth in the first table below.

Members of the Managing Board are eligible to participate in a defined contribution benefit plan. They may also benefit from other non-cash compensation or benefit in kind. A typical example of such non-cash compensation is the use of a Company-owned car.

All members of the Managing Board participated in the defined contribution benefit plan, which is financed by conversion of the Managing Directors’ salaries and the employer’s contribution. Generally, each plan participant is entitled to a one-time pension payment upon retirement after his 65th birthday. In the event of death prior to the age of 65, the invested funds are disbursed to the Managing Director’s heirs. In the event that the Managing Director’s service is terminated prior to his 65th birthday, the employee-financed part of the pension expectancy is paid out to the employee, and the employer-financed part is due to the employee only if the termination occurs after the fifth anniversary of the Managing Director’s participation in the defined contribution benefit plan. The amount of the 2011 contribution to the defined contribution benefit plan for each Managing Director is set forth in the second table below.

Equity-based compensation for each Managing Director is detailed in the second and third tables below. In addition to non-qualified stock options, our Amended and Restated 2005 Stock Plan provides for grants of other equity-based awards, including incentive stock options, stock grants and restricted stock units. In 2011, members

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of the Managing Board were granted stock options to purchase 184,351 Common Shares and 577,225 restricted stock units, in the aggregate. Awards to each Managing Director are set forth in the second table below. The accompanying tables below were prepared in conformity with U.S. generally accepted accounting principles.

The employment agreements between the Company and the Managing Board members have an indefinite term, but can be terminated by the Company with six months’ notice and by the Managing Directors with three months’ notice. All members of the Managing Board have additional employment agreements with QIAGEN affiliates with terms of employment ranging from 24 to 36 months. There are no arrangements for early retirement of the Managing Board members. In the event of a sale of the Company or a transfer of all or substantially all of the Company’s assets or business to an acquirer in one or several transactions, including a merger, consolidation or a transfer of shares to a third party, each member of the Managing Board shall be entitled to receive a change of control bonus payment commensurate to a multiple of his then-current annual salary, including annual bonus, paid by the Company and QIAGEN affiliates in accordance with applicable employment agreements.

Year ended December 31, 2011 |  | Annual Compensation |
Name |  | Fixed Salary |  |  | Variable Cash Bonus |  |  | Other (1) |  |  | Total |
Peer M. Schatz |  | $ | 1,305,000 |  |  | $ | 539,000 |  |  | $ | 1,000 |  |  | $ | 1,845,000 |
Roland Sackers |  | $ | 576,000 |  |  | $ | 194,000 |  |  | $ | 26,000 |  |  | $ | 796,000 |
Dr. Joachim Schorr (2) |  | $ | 366,000 |  |  | $ | 138,000 |  |  | $ | 38,000 |  |  | $ | 542,000 |
Bernd Uder |  | $ | 370,000 |  |  | $ | 141,000 |  |  | $ | 15,000 |  |  | $ | 526,000 |

| (1) | Amounts include, among others, inventor bonus and relocation costs. We also occasionally reimburse our Managing Directors’ personal expenses related to attending out-of-town meetings but not directly related to their attendance. The value of such reimbursed personal expenses is reported above as “other.” Amounts do not include the reimbursement of certain expenses relating to travel incurred at the request of QIAGEN, other reimbursements or payments that in total did not exceed $10,000 or tax amounts paid by the Company to tax authorities in order to avoid double-taxation under multi-tax jurisdiction employment agreements.

| (2) | Dr. Schorr is not standing for re-election to the Managing Board.

Managing Board members also receive a variable compensation component, in the form of equity-based awards. Stock options granted to the Managing Board members must have an exercise price that is higher than the market price of the Company’s Common Shares on the date of grant. During 2011, members of the Managing Board were granted stock options to purchase 184,351 Common Shares and 577,225 restricted stock units, in the aggregate.

Year ended December 31, 2011 |  | Long-Term Compensation |
Name |  | Defined Contribution Benefit Plan |  |  | Stock Options |  |  | Restricted Stock Units |
Peer M. Schatz |  | $ | 91,000 |  |  |  | 112,653 |  |  |  | 388,427 |
Roland Sackers |  | $ | 93,000 |  |  |  | 37,815 |  |  |  | 130,385 |
Dr. Joachim Schorr |  | $ | 35,000 |  |  |  | 17,231 |  |  |  | 29,705 |
Bernd Uder |  | $ | 57,000 |  |  |  | 16,652 |  |  |  | 28,708 |

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The following table sets forth the vested and unvested stock options and stock awards of our Managing Directors as of January 27, 2012:

Name |  | Total Vested Options |  |  | Total Unvested Options |  |  | Expiration Dates |  |  | Exercise Prices |  |  | Total Unvested Stock Awards |
Peer M. Schatz |  |  | 2,107,371 |  |  |  | 234,096 |  |  |  | 9/2012 to 2/2021 |  |  | $ | 4.59 to $22.43 |  |  |  | 1,467,856 |
Roland Sackers |  |  | 60,198 |  |  |  | 77,563 |  |  |  | 2/2018 to 2/2021 |  |  | $ | 16.34 to $22.43 |  |  |  | 374,294 |
Dr. Joachim Schorr |  |  | 52,015 |  |  |  | 36,038 |  |  |  | 2/2017 to 2/2021 |  |  | $ | 16.34 to $22.43 |  |  |  | 193,683 |
Bernd Uder |  |  | 47,599 |  |  |  | 28,703 |  |  |  | 2/2017 to 2/2021 |  |  | $ | 16.34 to $22.43 |  |  |  | 193,099 |

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ATTENDANCE FORM TO: QIAGEN | N.V.

c/o American Stock Transfer and Trust Company

Attention: Proxy Department

6201 15th Avenue

Brooklyn, New York 11219

QIAGEN N.V.

Annual General Meeting of Shareholders

June 27, 2012

The undersigned, holder of registered shares (with share certificate number through ) of QIAGEN N.V. (the “Company”), hereby notifies the Company that he/she/it wishes to attend and to exercise his/her/its shareholder rights at the Annual General Meeting of Shareholders of the Company to be held on Wednesday, June 27, 2012 at 10:30 a.m., local time, at Maaspoort, Oude Markt 30, 5911 HH Venlo, The Netherlands, and requests that the Company add his/her/its name to the admission list for the Annual General Meeting.

The undersigned registered shareholder realizes that he/she/it can only exercise his/her/its shareholder rights for the shares registered in his/her/its name as of the close of business (New York time) on Wednesday, May 30, 2012, the record date for the Annual General Meeting.

In witness whereof the undersigned has duly executed this form/caused this form to be duly executed by its authorized officers at this day of , 2012.

(Signature of registered shareholder)

(Signature of registered shareholder)

(Print full name of registered shareholder(s))

If the shares are held jointly, each registered holder must sign. Notification should be received no later than 5 p.m. (New York time) on June 20, 2012 at the offices of American Stock Transfer and Trust Company, Attention: Proxy Department, 6201 15th Avenue, Brooklyn, New York 11219, United States of America.

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ANNUAL GENERAL MEETING OF SHAREHOLDERS OF

QIAGEN N.V.

June 27, 2012

NOTICE OF INTERNET AVAILABILITY OF PROXY MATERIAL:

The Notice of Meeting, Proxy Statement, 2011 Annual Report

and copies of other documentation related to the Annual General Meeting

are available at www.qiagen.com/agm2012

Please mark, sign, date and

mail your proxy card in the

envelope provided as soon

as possible.

The proxy card must be

received no later than 5 p.m.

(New York Time) on June 22,

2012 for your vote to count.

i Please detach along perforated line and mail in the envelope provided. i

n

PLEASE MARK, SIGN, DATE AND RETURN PROMPTLY IN THE ENCLOSED ENVELOPE. PLEASE MARK YOUR VOTE IN BLUE OR BLACK INK AS SHOWN HERE x

|  |  |  | FOR |  | AGAINST |  | ABSTAIN |  |  |  |  |  | FOR |  | AGAINST |  | ABSTAIN
1. |  | Proposal to adopt the Annual Accounts for the year ended December 31, 2011 (“Fiscal Year 2011”). |  | ¨ |  | ¨ |  | ¨ |  |  |  | f. Mr. Heino von Prondzynski |  | ¨ |  | ¨ |  | ¨
2. |  | Proposal to discharge from liability the Managing Directors for the performance of their duties during Fiscal Year 2011. |  | ¨ |  | ¨ |  | ¨ |  |  |  | g. Ms. Elizabeth E. Tallett |  | ¨ |  | ¨ |  | ¨
3. |  | Proposal to discharge from liability the Supervisory Directors for the performance of their duties during Fiscal Year 2011. |  | ¨ |  | ¨ |  | ¨ |  | 5. |  | Reappointment of the Managing Directors for a term ending on the date of the Annual General Meeting in 2013. |  |  |  |  |  |
4. |  | Reappointment of the Supervisory Directors for a term ending on the date of the Annual General Meeting in 2013. |  |  |  |  |  |  |  |  |  | a. Mr. Peer Schatz |  | ¨ |  | ¨ |  | ¨
|  | a. Prof. Dr. Detlev Riesner |  | ¨ |  | ¨ |  | ¨ |  |  |  | b. Mr. Roland Sackers |  | ¨ |  | ¨ |  | ¨
|  | b. Dr. Werner Brandt |  | ¨ |  | ¨ |  | ¨ |  |  |  | c. Mr. Bernd Uder |  | ¨ |  | ¨ |  | ¨
|  | c. Dr. Metin Colpan d. Mr. Erik Hornnaess |  | ¨ ¨ |  | ¨ ¨ |  | ¨ ¨ |  | 6. |  | Proposal to reappoint Ernst & Young Accountants as auditors of the Company for the fiscal year ending December 31, 2012. |  | ¨ |  | ¨ |  | ¨
|  | e. Prof. Dr. Manfred Karobath |  | ¨ |  | ¨ |  | ¨ |  | 7. |  | Proposal to authorize the Supervisory Board, until December 27, 2013, |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  | a. to issue a number of Common Shares and financing preference shares and grant rights to subscribe for such shares |  | ¨ |  | ¨ |  | ¨
|  |  |  |  |  |  |  |  |  |  |  | b. to restrict or exclude the pre-emptive rights with respect to issuing shares or granting subscription rights up to 20% of the aggregate par value of all shares issued and outstanding |  | ¨ |  | ¨ |  | ¨
|  |  |  |  |  |  |  |  |  | 8. |  | Proposal to authorize the Managing Board, until December 27, 2013, to acquire shares in the Company’s own share capital. |  | ¨ |  | ¨ |  | ¨
|  | THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED FOR AND IN FAVOR OF THE PROPOSALS SET FORTH HEREIN UNLESS A CONTRARY SPECIFICATION IS MADE.
To change the address on your account, please check the box at right and indicate your new address in the address space above. Please note that changes to the registered name(s) on the account may not be submitted via this method. |  | ¨ |  |

Signature of Shareholder |  |  |  | Date: |  |  |  | Signature of Shareholder |  |  |  | Date: |  |

Note: n |  | Please sign exactly as your name or names appear on this Proxy. When shares are held jointly, each holder should sign. When signing as executor, administrator, attorney, trustee or guardian, please give full title as such. If the person named on the stock certificate has died, please submit evidence of your authority. If the signer is a corporation, please sign full corporate name by a duly authorized officer, giving full title as such. If the signer is a partnership, please sign in partnership name by an authorized person. |  | n

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|  | ¨ |  | ¢
|  | QIAGEN N.V. Proxy for Annual General Meeting of Shareholders to be held June 27, 2012 THIS PROXY IS SOLICITED ON BEHALF OF THE MANAGING BOARD AND SUPERVISORY BOARD THE UNDERSIGNED hereby appoints an independent attorney, Mr. Thomas Dörmer of Linklaters LLP, and each attorney employed by Linklaters LLP, or either of them individually and each of them with full power of substitution, as proxies to vote for and on behalf of the undersigned at the Annual General Meeting of Shareholders of QIAGEN N.V. (the “Company”) to be held on Wednesday, June 27, 2012 at 10:30 a.m., local time, at Maaspoort, Oude Markt 30, 5911 HH Venlo, The Netherlands, upon and with respect to all of the Common Shares of the Company to which the undersigned would be entitled to vote and act if personally present. The undersigned hereby directs the proxies to vote in accordance with their judgment on any matters which may properly come before the meeting, all as indicated in the Notice of the meeting, receipt of which is hereby acknowledged, and to act on the following voting matters set forth in such Notice as specified by the undersigned. If no direction is given, this proxy will be voted FOR election of the Managing Directors and Supervisory Directors and FOR Proposals 1, 2, 3, 6, 7 and 8. (Continued and to be signed on the reverse side.) |  |

¢ |  | 14475 |  | ¢

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Voting Results of the 2012 Annual General Meeting of Shareholders

QIAGEN’s 2012 Annual General Meeting of Shareholders (the “Annual Meeting”) was held on June 27, 2012. The following actions were taken at the Annual Meeting:

| 1. | Proposal to adopt the Annual Accounts of QIAGEN N.V. (the “Company”) for the year ended December 31, 2011 (“Fiscal Year 2011”) was approved by a vote of 128,921,858 “for” versus 5,958 “against.” There were 183,923 abstentions.

| 2. | Proposal to discharge from liability the Managing Directors for the performance of their duties during Fiscal Year 2011 was approved by a vote of 124,918,983 “for” versus 1,372,755 “against.” There were 2,820,001 abstentions.

| 3. | Proposal to discharge from liability the Supervisory Directors for the performance of their duties during Fiscal Year 2011 was approved by a vote of 124,916,217 “for” versus 1,375,646 “against.” There were 2,819,876 abstentions.

| 4. | a. Proposal to reappoint Prof. Dr. Detlev Riesner as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 78,089,383 “for” versus 50,996,655 “against.” There were 25,701 abstentions.

b. Proposal to reappoint Dr. Werner Brandt as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 127,485,405 “for” versus 1,470,633 “against.” There were 155,701 abstentions.

c. Proposal to reappoint Dr. Metin Colpan as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 88,309,469 “for” versus 40,776,211 “against.” There were 26,059 abstentions.

d. Proposal to reappoint Mr. Erik Hornnaess as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 69,674,514 “for” versus 59,411,116 “against.” There were 26,109 abstentions.

e. Proposal to reappoint Prof. Dr. Manfred Karobath as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 76,191,828 “for” versus 52,893,811 “against.” There were 26,109 abstentions.

f. Proposal to reappoint Mr. Heino von Prondzynski as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 127,596,422 “for” versus 1,489,217 “against.” There were 26,109 abstentions.

g. Proposal to appoint Ms. Elizabeth Tallett as a Supervisory Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 126,390,845 “for” versus 2,017,324 “against.” There were 703,579 abstentions.

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| 5. | a. Proposal to reappoint Mr. Peer Schatz as a Managing Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 129,024,131 “for” versus 62,041 “against.” There were 25,567 abstentions.

b. Proposal to reappoint Mr. Roland Sackers as a Managing Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 129,022,774 “for” versus 64,098 “against.” There were 24,867 abstentions.

c. Proposal to reappoint Mr. Bernd Uder as a Managing Director of the Company for a term ending on the date of the Annual General Meeting in 2013 was approved by a vote of 129,044,745 “for” versus 41,377 “against.” There were 25,617 abstentions.

| 6. | Proposal to reappoint Ernst & Young Accountants as auditors of the Company for the fiscal year ending December 31, 2012 was approved by a vote of 127,304,304 “for” versus 1,549,078 “against.” There were 303,711 abstentions.

| 7. | a. Proposal to authorize the Supervisory Board to issue a number of Common Shares and financing preference shares and grant rights to subscribe for such shares, the aggregate par value of which shall be equal to the aggregate par value of all shares issued and outstanding in the capital of the Company as at December 31, 2011 as included in the Annual Accounts for Fiscal Year 2011 was approved by a vote of 101,267,169 “for” versus 27,789,338 “against.” There were 55,232 abstentions.

b. Proposal to authorize the Supervisory Board to restrict or exclude the pre-emptive rights with respect to issuing shares or granting subscription rights, the aggregate par value of such shares or subscription rights shall be up to a maximum of 20% of the aggregate par value of all shares issued and outstanding in the capital of the Company as at December 31, 2011 was approved by a vote of 102,008,024 “for” versus 26,901,757 “against.” There were 201,958 abstentions.

| 8. | Proposal to authorize the Managing Board to acquire shares in the Company’s own share capital until December 30, 2013 was approved by a vote of 127,729,479 “for” versus 747,334 “against.” There were 634,926 abstentions.

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KEY FIGURES

QIAGEN KEY FIGURES 2011

As of December 31

$1,000 except per share data Results |  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2008 |  |  | 2007 |
Net sales |  |  | 1,169,747 |  |  |  | 1,087,431 |  |  |  | 1,009,825 |  |  |  | 892,975 |  |  |  | 649,774 |
Operating income |  |  | 99,588 |  |  |  | 188,537 |  |  |  | 180,205 |  |  |  | 145,662 |  |  |  | 83,133 |
Net income 1 |  |  | 96,038 |  |  |  | 144,311 |  |  |  | 137,767 |  |  |  | 89,033 |  |  |  | 50,122 |
Basic earnings per share 1 |  |  | 0.41 |  |  |  | 0.62 |  |  |  | 0.67 |  |  |  | 0.45 |  |  |  | 0.30 |
Diluted earnings per share (EPS) 1, 2 |  |  | 0.40 |  |  |  | 0.60 |  |  |  | 0.64 |  |  |  | 0.44 |  |  |  | 0.28 |
Number of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common chares used to compute basic net income per common share |  |  | 233,850 |  |  |  | 232,635 |  |  |  | 206,928 |  |  |  | 196,804 |  |  |  | 168,457 |
Weighted average number of common shares used to compute diluted net income per common share |  |  | 239,064 |  |  |  | 240,483 |  |  |  | 213,612 |  |  |  | 204,259 |  |  |  | 175,959 |
Cash flow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow from operations |  |  | 244,779 |  |  |  | 250,752 |  |  |  | 216,995 |  |  |  | 172,998 |  |  |  | 84,811 |
Capital expenditures for property, plant and equipment |  |  | 86,805 |  |  |  | 79,667 |  |  |  | 52,179 |  |  |  | 39,448 |  |  |  | 34,492 |
Free cash flow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Cash flow from operations less capital expenditures) |  |  | 157,974 |  |  |  | 171,085 |  |  |  | 164,816 |  |  |  | 133,550 |  |  |  | 50,319 |
Cash EPS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Cash flow from operations / weighted average number of diluted shares) |  |  | 1.02 |  |  |  | 1.04 |  |  |  | 1.02 |  |  |  | 0.85 |  |  |  | 0.48 |
Balance sheet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  | 3,756,453 |  |  |  | 3,913,995 |  |  |  | 3,796,464 |  |  |  | 2,885,323 |  |  |  | 2,775,174 |
Cash and cash equivalents |  |  | 221,133 |  |  |  | 828,407 |  |  |  | 825,557 |  |  |  | 333,313 |  |  |  | 347,320 |
Total long-term liabilities, including current portion |  |  | 722,621 |  |  |  | 1,125,070 |  |  |  | 1,183,182 |  |  |  | 1,197,088 |  |  |  | 1,220,084 |
Total shareholders’ equity 1 |  |  | 2,548,304 |  |  |  | 2,476,353 |  |  |  | 2,291,169 |  |  |  | 1,453,844 |  |  |  | 1,391,575 |

1 | Attributable to the owners of QIAGEN N.V.

2 | 2010 results reflect capital increase in 2009 and corresponding change in number of shares outstanding

NET SALES |  | ADJUSTED NET INCOME |  | ADJUSTED DILUTED EARNINGS PER SHARE
|  | Excluding acquisition, business integration, restructuring and related charges as well as amortization of acquired IP and equity-based compensation of $61.4 million in 2007, $74.3 million in 2008, $61.8 million in 2009, $78.4 million in 2010, and $138.4 million in 2011. |  | Excluding acquisition, business integration, restructuring and related charges as well as amortization of acquired IP and equity-based compensation of $0.35 in 2007, $0.36 in 2008, $0.29 in 2009, $0.33 in 2010, and $0.58 in 2011.

$1,000 |  | $1,000 |  | $ per share

CAGR – Compound annual growth rate

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QIAGEN AT A GLANCE

CUSTOMER WORKFLOW

BIOLOGICAL SAMPLE |  |  |  | VALUABLE MOLECULAR INFORMATION
|  | Extraction, isolation and purification of the molecules of life – DNA, RNA and proteins – in reliable, standardized processes. |  | Wide range of tailor-made applications to make molecular information from biological samples visible and available for interpretation. |  |
PRODUCT CATEGORIES |  |  |  |
13% INSTRUMENTS |  |  |  | 87% CONSUMABLE PRODUCTS
are used with consumables, even enabling customers to fully automate processes from the preparation of clinical samples to delivery of valuable results. |  |  |  | are specialized kits that contain all necessary materials to support the use of sample and / or assay technologies. |  |
CUSTOMER CLASSES |  |  |  |

|  | Physicians, hospitals and healthcare providers use QIAGEN technologies to save lives and fight disease. Our products support disease prevention such as screening women for risk of cervical cancer; profiling of patients to pinpoint many diseases; personalized healthcare to guide treatment decisions; and point of need testing to provide on-site diagnosis. Professionals in fields such as human identification and forensics, food testing and veterinary medicine use QIAGEN technologies in commercial applications beyond human healthcare. Our products are helping to solve crimes, secure food supplies and detect potentially devastating livestock diseases. Scientists in the pharmaceutical and biotechnology industries look to QIAGEN to advance gene-based drug discovery and development, supporting the creation of new medical breakthroughs. Researchers at life science laboratories around the world depend on QIAGEN to advance our understanding of the molecular basis of life. Customers include universities and research institutes. |  |

Percentage share of 2011 net sales

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THE QIAGEN SPIRIT

LETTER TO OUR SHAREHOLDERS |  |  | 5 |
REPORT OF THE SUPERVISORY BOARD |  |  | 9 |
2011 REVIEW |  |  | 67 |

2 |  | QIAGEN Annual Report 2011

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QIAGEN Annual Report 2011 |  | 3

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Peer M. Schatz | Chief Executive Officer

Dear Shareholders

When I meet with the employees of QIAGEN at our locations around the world, I feel the spirit, pride and excitement among our people about their roles in shaping a new wave of growth in the molecular revolution. Our employees are committed to transforming the technologies and workflows used in healthcare, life sciences research, and industrial and public safety applications. They are applying state-of-the-art science to meet the urgent needs of society, and as a result creating significant value for our customers, shareholders and QIAGEN.

Indeed, our employees are helping make improvements in life possible, and our achievements to date have been the result of their outstanding level of commitment, energy and talent. I extend my sincere appreciation and thanks to each of our employees on behalf of the members of the Supervisory Board and Executive Committee.

It is clear that QIAGEN faced a very challenging year in 2011, one that began with unprecedented catastrophes in Japan and other countries in the Asia-Pacific region. The ongoing macroeconomic weakness in the U.S. and Europe led to continued softness in utilization of healthcare services, and the fiscal crisis prompted many governments to curb investments in life science research. These factors not only negatively affected the stock price of QIAGEN and many of our peers, but also were the key reasons that led to softer sales growth in 2011. Despite these volatilities, we still delivered growth in all regions

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THE QIAGEN SPIRIT | LETTER TO OUR SHAREHOLDERS

and all customer classes and were able to achieve our earnings targets. Net sales grew 8% to $1.17 billion, while net income attributable to owners of QIAGEN N.V. declined 33% to $96.0 million, primarily due to the impact of a $75 million restructuring charge related to our productivity initiative started in the fourth quarter of 2011 as well as charges related to two important strategic acquisitions made in the year. Our results on an adjusted basis, which exclude costs such as restructuring-related charges as well as the amortization of intangible assets and share-based compensation, showed sustained improvement over 2010.

We took important actions during 2011 to improve our performance as the year progressed, expanding net sales at a faster pace in the second half of the year and making significant progress on our strategy to leverage QIAGEN’s leadership in Sample & Assay Technologies to drive innovation and growth. QIAGEN is at an inflection point, and we see a new wave of growth and innovation emerging, energized by the spirit of our employees and focused on four strategic initiatives:

Driving platform success: Our focus has shifted from individual instruments to complete automation systems that cover entire laboratory workflows from initial sample processing to final result, and are based on long-term supply and service agreements. A prime example is the QIAsymphony RGQ, a breakthrough modular system that has started a new era of laboratory automation and workflow consolidation. The global rollout of this cutting-edge automation platform is progressing faster than initially expected. At the end of 2011, the QIAsymphony installed base exceeded 550 systems worldwide, and we have set an ambitious target to add 200 new systems by the end of 2012. We believe this platform is in the early years of a product cycle that will last at least a decade, driven by the need for effi-cient, highly versatile and flexible automation solutions manifest in all of QIAGEN’s customer classes. Also in 2011, we completed a key milestone in advancing our high-throughput automation portfolio by introducing the QIAensemble Decapper, a unique system that automates many tedious manual tasks for handling clinical liquid sample vials.

Adding content: Leveraging our automation platforms, QIAGEN is adding new test content through innovation and acquisitions to expand our offering in every customer class. In our largest customer class, Molecular Diagnostics, we already market a full portfolio of blood viral, microbiology and virology assays – plus proprietary companion diagnostics – in Europe and Asia. We have made a significant start on migrating these to the United States through three FDA regulatory submissions in 2011. The acquisitions of Cellestis Ltd. and Ipsogen S.A. added important assays for latent tuberculosis (TB) and a range of blood cancers to the QIAGEN portfolio. We have also significantly expanded our offering for our customers in Academia, Pharma and Applied Testing. Key product launches in 2011 included several new mericon assays for food safety testing, a series of new Investigator kits for forensic applications, as well as the Certal product line for quality control in bioprocessing. An updated version of our GeneGlobe online portal now provides scientists with access to about 60,000 gene-specific assays for R&D applications.

Broadening geographic presence: While we continue to find growth opportunities in developed countries, our expansion in emerging markets is truly dynamic. The top seven emerging markets generated 21% growth at constant exchange rates in 2011 and represented 12% of net sales. China represents our third-largest market in sales, and we opened subsidiaries in 2011 to begin direct sales in India and Taiwan. Key areas for future expansion are in Eastern Europe, Latin America and Asia.

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Growing efficiently and effectively: QIAGEN launched a project in late 2011 to boost productivity and free up an estimated $50 million in cost savings – mostly for reallocation to strategic initiatives designed to drive innovation and growth. Initial actions focused on eliminating organizational layers, overlapping structures and duplication. These measures have also led to workforce reductions, which were handled in a responsible manner with fair and respectful treatment of our employees. As we move forward, we are refocusing R&D activities on high-growth areas, optimizing capacity utilization at selected sites and capturing savings from shared service functions.

We believe a major advantage for QIAGEN is that our products and expertise span all customer classes in molecular testing. No other company from our perspective covers the entire continuum from basic research in Academia right into various commercial applications in Molecular Diagnostics, Pharma and Applied Testing in a depth and quality comparable to what QIAGEN has built. Today, as knowledge and invention flow ever more quickly from research to commercial products, I am convinced that QIAGEN is uniquely equipped to provide solutions at every step, and especially now that this continuum is starting to leverage its potential. We see opportunities to help our customers simplify and transform their workflows across all phases of the value chain.

In Molecular Diagnostics, which contributed 47% of net sales in 2011, QIAGEN made significant strides in expanding our test portfolio. One of the most exciting developments under way today in modern medicine is the emergence of ways to personalize healthcare – identifying the most appropriate treatments for a patient. QIAGEN has taken a strong leadership position as the provider of choice for molecular companion diagnostics, driven by a broad range of products, such as the KRAS and EGFR tests approved during 2011 in Japan. QIAGEN also completed two U.S. submissions in 2011 for the therascreen KRAS test as a companion diagnostic for novel colorectal cancer drugs. QIAGEN had another successful year in reaching new co-development partnerships with pharmaceutical companies and acquiring exclusive rights to novel biomarkers. We are very focused on providing significant value to our partners in the pharmaceutical industry, the laboratories providing companion diagnostic testing services, the payers expecting significant benefits, and most importantly the patients who can benefit from the use of these technologies to improve the quality and efficiency of healthcare.

An ongoing challenge in 2011 was the post-recession decline in U.S. utilization of healthcare services, including the use of our digene HPV Test to prevent cervical cancer (which accounted for approximately 15% of total net sales in 2011). We continue to drive market conversion to molecular HPV testing, approaching the 50% penetration threshold and growing test volumes, as well as locking in long-term contracts with key U.S. customers. We are also leading the global expansion of HPV testing, including initiatives in Europe and emerging markets. In China, we submitted our careHPV Test, an important advance for cervical cancer prevention in low-resource settings, and received regulatory approval for a next-generation careHCV test. A number of important submissions are planned for 2012.

Applied Testing, which contributed 7% of net sales in 2011, is growing thanks to QIAGEN’s easy-to-use platforms and proprietary technologies for applications that safeguard society and its food supplies. We are expanding our test content and transforming workflows. In forensics, QIAGEN is in the forefront of an ongoing shift toward uniform standards for human identification procedures. As a longtime leader in providing sample technology kits for forensics, we now offer a range of assays and instruments for genetic fingerprinting – thereby also offering a complete workflow and full systems.

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THE QIAGEN SPIRIT | LETTER TO OUR SHAREHOLDERS

We are also growing rapidly in food safety testing and veterinary diagnostics for livestock, with an array of molecular assays and instruments to automate testing in laboratories or in the field.

Pharma, which contributed 20% of net sales in 2011, faces industry challenges that include cost pressures and Big Pharma mergers. These have, however, also led to a situation where there has never been a greater need for more effective research and development. QIAGEN has built an extensive portfolio of products to enable Pharma research into disease pathways, and the automated work-flows of our QIAsymphony platform enhance the productivity of industry labs. Increasingly, our molecular technologies are also used in designing clinical trials, selecting and profiling patients, monitoring disease progression and providing insights for better drug development. We are seeing substantial growth in molecular testing for clinical research in Pharma and Academia.

Academia, which contributed 26% of net sales in 2011, is a group of customers that is the heart of the life science industry – generating new ideas about the secrets of life and creating innovative approaches to disease. As an area of strength for QIAGEN, Academia is very important for us. In addition to profit-able sales, relationships with academic scientists drive dissemination well beyond basic research labs. Increasingly, universities and institutes are expanding from discovery research into translational medicine, even conducting clinical trials, to move innovations into the marketplace. As translational research gains momentum, QIAGEN’s engagement across the entire value chain – basic research, drug development, clinical diagnostics and other commercial applications – provides a significant competitive advantage.

The strategies I have outlined here hold significant potential to deliver sustainable sales growth. At the same time, we are highly dedicated to driving earnings growth and increasing shareholder value in 2012 and beyond. The efficiency initiative started in 2011 will help us to improve margins through strategic actions to enhance productivity, streamline operations, and focus on growth in highly profit-able areas of our customer classes. Like you, we are not satisfied with the recent share price performance of QIAGEN, and we are as committed as ever to creating shareholder value by intensifying our focus on our strategic initiatives. Our vision for QIAGEN is to play an ever more pivotal role in the molecular revolution, leveraging the value of our growing portfolio of innovative technologies across all customer classes. We appreciate the dedicated spirit of our 3,900 employees and our business partners around the world, and we are committed to making QIAGEN a great workplace that attracts the very best people.

We are convinced that our strategy will deliver faster growth in the coming years and create value for all of our stakeholders – our shareholders, our employees, our customers and, above all, the people who benefit from our Sample & Assay Technologies – in line with our mission of making improvements in life possible.

Thank you for your loyalty and support of QIAGEN.

Peer M. Schatz

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To our Shareholder

The Supervisory Board wishes to thank all QIAGEN employees and members of the Executive Committee for contributing to our achievements in 2011. We would also like to thank our shareholders, customers, business partners and other stakeholders for honoring QIAGEN with your continued collaboration and trust.

Economic events created a challenging business environment in 2011, but QIAGEN delivered growth in all customer classes and across geographic regions.

We achieved significant milestones on our strategic initiatives, and as the year progressed we began to realize accelerating total sales growth. These advances confirm our conviction that QIAGEN’s innovative new products and strategic acquisitions will deliver growing value in the coming years for customers of our Sample & Assay Technologies, and increasing returns for shareholders.

Among the year’s strategic accomplishments, QIAGEN reached an installed base of more than 550 QIAsymphony instruments, propelled by introduction of the full QIAsymphony RGQ platform. We launched new test content in each customer class and pursued regulatory approvals in the U.S. for two KRAS companion diagnostic tests to expand global markets for promising assays in Molecular Diagnostics. The full acquisition of Cellestis Ltd. and an 89% majority stake in Ipsogen S.A. added breakthrough diagnostic technologies with dynamic growth opportunities. Geographic expansion continued, especially in emerging markets as QIAGEN began direct operations in India and Taiwan. Late in the year, after intensive discussion within the Supervisory Board, QIAGEN also began implementing a comprehensive project to improve productivity and enhance profitability through changes throughout the organization. As empowered by the Dutch Corporate Governance Code, the Supervisory Board devoted considerable time in 2011 to discussing QIAGEN’s corporate strategy, main risks and opportunities, and an annual assessment by the Managing Board of the design and effectiveness of internal risk management and control systems as well as any significant changes in them.

In addition, the Supervisory Board discussed and reviewed the functioning of its committees and individual members, its current composition, competence and desired profile. The Supervisory Board came to the conclusion that it and the Managing Board were properly functioning. Following the tragic passing in October 2011 of Dr. Vera Kallmeyer, who had joined the Supervisory Board earlier in the year, we have begun to search for additional candidates in our aim to expand the profile of the Supervisory Board in terms of competences, experiences and international background.

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THE QIAGEN SPIRIT | REPORT OF THE SUPERVISORY BOARD

Prof. Dr. Detlev H. Riesner | Chairman of the Supervisory Board

Through its Compensation Committee, the Supervisory Board executed and monitored compliance with the Remuneration Policy approved at the Annual General Meeting held on June 14, 2005.

Compensation of Managing Board members consists of a fixed salary and variable components. Variable compensation includes one-time and annual payments linked to business performance (bonuses) as well as long-term incentives containing risk elements, such as stock options or other equity-based compensation, and pension plans. The Remuneration Policy and the various aspects of compensation, including the detailed remuneration of individual Managing Board members, are described in the Remuneration Report, which is also available on QIAGEN’s website. Information on QIAGEN’s activities was communicated by the Managing Board to the Supervisory Board through regular meetings and business reports.

The Supervisory Board has appointed an Audit Committee, a Compensation Committee and a Selection and Appointment (Nomination) Committee, each composed of Supervisory Board members, and can appoint other committees as deemed beneficial.

The Supervisory Board has approved charters pursuant to which each of the committees operates. The charters are published on QIAGEN’s website. Further detailed information on the composition of the

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Supervisory Board and its committees, the number of committee meetings held in 2011 and the main topics of discussion, the independence of its members and their remuneration, as well as other information on the Supervisory Board, can be found in the Corporate Governance Report, which is an integral part of this Annual Report.

The Supervisory Board met nine times during 2011 with regular attendance of the members of the Managing Board for certain agenda items. The Supervisory Board also met to review and discuss agenda items in the absence of the Managing Board members, such as to review performance and strategy as well as to discuss compensation matters. We are pleased to report very high attendance at our meetings – no member of the Supervisory Board was frequently absent from the Supervisory Board meetings in 2011. Information about the Supervisory Board members, including positions held on other boards, is included in the Corporate Governance Report.

All members of the Supervisory Board fulfill the independence criteria as defined by the Marketplace Rules of the NASDAQ Stock Market and the Dutch Corporate Governance Code, with the exception of our former CEO Dr. Metin Colpan due to his position as a consultant for QIAGEN.

QIAGEN N.V. is a company organized under the laws of the Netherlands and has an international network of subsidiaries. The Supervisory Board follows the principle of increasing shareholder value as we represent the interests of all stakeholders, including shareholders, and has always pursued the highest standards in Corporate Governance.

QIAGEN is committed to a corporate governance structure that best suits its business and stakeholders, and that complies with relevant rules and regulations. Since 1997, QIAGEN has endorsed the recommendations made in the report of the Netherlands Committee on Corporate Governance, which was replaced by the Dutch Corporate Governance Code effective January 1, 2004, and amended and restated effective January 1, 2009. Our policy is to follow the guidelines of Good Practice of Corporate Governance as described in the Dutch Corporate Governance Code, although some minor deviations may result from the impact of factors such as legal requirements imposed on QIAGEN or industry standards.

QIAGEN is also subject to the rules regarding Corporate Governance set by NASDAQ, where our common shares have been listed since 1996. In addition, QIAGEN has adopted the standards set by the Corporate Governance Code of Germany, where our common shares have been listed since 1997. QIAGEN provides detailed disclosure in the Corporate Governance Report regarding compliance with the German and Dutch Corporate Governance Codes.

QIAGEN believes all of our operations are carried out in accordance with legal frameworks, including Dutch Corporate Law, U.S. laws and regulations, and the laws of the German capital market, in particular the Wertpapierhandelsgesetz.

QIAGEN’s common shares are registered and traded in the U.S. on the NASDAQ Global Select Market and in Germany on the Frankfurt Stock Exchange in the Prime Standard segment. Shareholders in the U.S. and Europe hold the majority of common shares. Among topics the Supervisory Board discussed during 2011 were strategies for allocation of capital to enhance returns to shareholders.

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THE QIAGEN SPIRIT | REPORT OF THE SUPERVISORY BOARD

In 2011, shareholders authorized the Managing Board, subject to approval of the Supervisory Board, to repurchase common shares through December 31, 2012. The Supervisory Board continues to actively consider its options.

In this Annual Report, the financial statements for 2011 are presented as prepared by the Managing Board, audited by Ernst & Young LLP (Independent Registered Public Accounting Firm), and examined and approved by the Supervisory Board.

The term of office for the members of the Supervisory Board expires as of the close of the Annual General Meeting of Shareholders of QIAGEN N.V., which is scheduled for June 27, 2012. All members of the Supervisory Board will stand for reelection at this meeting: Prof. Dr. Detlev H. Riesner, Dr. Werner Brandt, Dr. Metin Colpan, Erik Hornnaess, Prof. Dr. Manfred Karobath, Elizabeth E. Tallett and Heino von Prondzynski. The Supervisory Board also plans to propose during the Joint Meeting of members of the Supervisory Board and Managing Board that the members of the Managing Board be reelected at this Annual General Meeting.

Venlo, the Netherlands, March 2012

Prof. Dr. Detlev H. Riesner

Chairman of the Supervisory Board

IN MEMORIA M

DR. VER A K ALL MEYER

Dr. Vera Kallmeyer, a member of the QIAGEN

Supervisory Board, passed away on October 21, 2011.

Dr. Kallmeyer, a consulting professor in the Department of Neurosurgery at the Stanford University School of Medicine and founding partner of the investment and consulting firm Equity4Health LLC, joined the Supervisory Board and Audit Committee earlier in 2011. She quickly brought fresh scientific and business perspectives to QIAGEN before her life was unfortunately cut short. With M.D., Ph.D. and M.B.A. degrees, Dr. Kallmeyer had deep experience and was an international thought leader in entrepreneurial healthcare businesses. She taught at Stanford on biomedical innovation, translational medicine and entrepreneurship. During the short time Dr. Kallmeyer was with us, QIAGEN benefited from her rich insights and her friendship on the Supervisory Board.

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QIAGEN’S GROWTH

AND INNOVATION STRATEGY

WE ARE IMPLEMENTING A STRATEGY TO LEVERAGE OUR LEADERSHIP IN SAMPLE & ASSAY TECHNOLOGIES TO DRIVE GROWTH AND INNOVATION ACROSS ALL CUSTOMER CLASSES.

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THE QIAGEN SPIRIT | QIAGEN’S GROWTH STRATEGY

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“THE HEALTHCARE SYSTEM IS FIGHTING INCREASING COSTS. SINCE YOU DON’T WANT TO RATION CARE, THE ONLY VIABLE OPTION TO ADDRESS THIS ISSUE IS TO GET MORE EFFICIENT IN TREATMENT, TO BE SMARTER IN THE WAY WE PROVIDE CARE.”

The turning point for Carole Welsch came at Singapore General Hospital. With a Ph.D. in molecular and cellular biology, Dr. Welsch was working as a post-doctoral research scientist in the hospital’s National Cancer Center, and already understood the scientific intricacies of cancer and what makes treatments work. But it was the patients she encountered in Singapore who made the difference. “Being exposed every day to the cancer patients – so many of their situations are heartbreaking – it changes you. It makes you want to get up in the morning and go to work to help them,” Dr. Welsch says.

Now Dr. Welsch is more excited than ever about improving the lives of those patients. As a U.S. marketing manager for Molecular Diagnostics, she is helping to drive the 21st Century approach to medicine known as Personalized Health-care – a change that has only recently begun to take hold, but has already dramatically impacted the care of patients. Personalized Healthcare starts with the patients. Instead of applying a “best guess” approach to treatment, each patient is evaluated with companion diagnostics to determine the genetic likelihood of success with specific medicines. The right drug for the right patient at the right time can make a big difference.

“About 75% of patients in oncology don’t respond to treatment. Unfortunately, traditional therapy is often trial and error – patients get one treatment, and if that doesn’t work then they are led to the next treatment,” Dr. Welsch says. “With Personalized Healthcare, the patient doesn’t have to endure the process of waiting and watching to see what works, while also suffering through the side effects, which are often significant.”

Genomic Data Changes Everything

Genetic tests that enable personalized therapies are one of many rapidly growing areas in healthcare. As the largest customer class of QIAGEN, Molecular Diagnostics (47% of QIAGEN’s total sales in 2011) is providing products that tap into DNA and RNA, the most basic structures of life, to assist in human healthcare. Specialized Sample & Assay kits, used in tandem with advanced automation systems, can unlock valuable information from those molecules that may hold the keys to life or death, disease prevention or progression, and healing or declining in health. QIAGEN has strategically built its position as a leading company in Molecular Diagnostics by offering a broad portfolio of tests and automated systems for various healthcare needs. With a total global market estimated at more than $4.6 billion in 2011, and an annual compound growth rate of 15% from 2010 to 2015, molecular testing represents the most dynamic segment of the global in vitro diagnostics market. Focusing on various pillars of patient need, QIAGEN is executing its growth strategy across four areas:

PREVENTION – QIAGEN is building a range of solutions for screening non-symptomatic patients for disease risks to allow early intervention. For example, QIAGEN is helping to drive the global expansion of human papillomavirus (HPV) testing to support early detection of cervical cancer, a

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leading cause of cancer-related death among women. In 2011, QIAGEN’s acquisition of Cellestis Ltd., creator of a novel screening test for latent tuberculosis (TB), added a new growth driver in Prevention based on a unique “pre-molecular” technology that also holds promise in identifying other latent diseases present in a person but not yet active.

PROFILING – QIAGEN continues to expand its extensive menu of tests for profiling various diseases, such as infections with influenza, hepatitis, and HIV to allow a better diagnosis for early and targeted treatment.

PERSONALIZED HEALTHCARE – QIAGEN’s Personalized Health-care franchise is building on a broad portfolio of tests that cover more than 30 biomarkers and help unlock genomic information which enable physicians to tailor treatments to individual patients. In 2011, QIAGEN added new bio-markers to its pipeline of companion diagnostics, expanded partnerships with top pharmaceutical companies, and completed two Premarket Approval (PMA) application submissions to the U.S. Food and Drug Administration (FDA) for a test that guides colorectal cancer treatments. QIAGEN’s acquisition of an 89% majority stake in Ipsogen S.A. during 2011 added a new area of leadership with a portfolio of assays to profile leukemia and other blood cancers.

POINT OF NEED – Molecular testing is increasingly moving into the field and other settings with no laboratory infrastructure and the need for quick results. Following QIAGEN’s acquisition of the innovative ESE platform in 2010 that addresses exactly these requirements, new applications are being developed in Molecular Diagnostics and other fields.

QIAGEN is executing a clear strategy to accelerate growth in Molecular Diagnostics and drive the healthcare transformation: improving automation platforms, expanding assay menus and broadening its global presence – while emphasizing efficiency and effectiveness in managing growth. Achievements in each strategic initiative reinforce momentum in other areas. Placing QIAGEN’s systems in laboratories drives dissemination of sample and assay kits, while expanding the “content” menu increases the value of QIAGEN instruments to customers. Geographic expansion not only fuels sales but also builds QIAGEN’s global reputation and adds scale for effective product launches.

A major initiative of QIAGEN is the global rollout of QIAsym-phony, a flexible modular platform that addresses what is believed to be the largest market segment in molecular testing: low- to medium- throughput laboratories. QIAsymphony has helped to launch a new era of laboratory automation and workflow consolidation. In 2011, QIAGEN achieved its goal of more than 550 QIAsymphony systems installed worldwide since its launch and established a new target to reach more than 750 installed systems by the end of 2012. QIAsymphony RGQ is the complete sample-to-result version that was launched at the end of 2010. It provides the most versatile integrated workflow available, delivering reliable data with maximum speed and minimum hands-on time. The platform is achieving rapid acceptance among many

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different types of laboratory customers – in Molecular Diagnostics as well as in QIAGEN’s other customer classes. The business value of flexible automation for clinical laboratories is augmented by QIAGEN’s expanding menu of assays designed to run on the QIAsymphony platform. Equally important is that laboratories place a high value on QIAsym-phony’s versatility as the only automation system that can process both commercial assays as well as laboratory-developed tests. These tests, known as “LDTs,” were previously often performed manually. This was a time-consuming and expensive process given that LDTs account for up to 50% of test volumes in clinical laboratories. Based on its ability to be used with such a broad range of tests, the demand for QIAsymphony RGQ is expected to remain strong for many years and to be a key growth driver over the next decade.

Building on a longstanding reputation as a pioneer in life science research, QIAGEN has created a leading position in Molecular Diagnostics through relationships with the scientists and clinicians who are using genomic technologies to transform the work of hospital and independent laboratories. “QIAGEN is the most respected brand name among research labs because originally, we were a pure life science research company. Over the last decade, we have established the same thing with the clinical labs,” Dr. Welsch says. “Clinical labs have come to know QIAGEN for our quality and reliability. Now we are strengthening our position with therascreen companion diagnostics and other tests in areas such as Profiling and Prevention.” As the world faces an aging population and growing healthcare obligations, diagnostics account for only 2% of medical costs – but drive more than 70% of treatment decisions. Using biomarkers and genomic information to save lives, guide treatments and conserve scarce resources offers great promise.

Prevention Detects Disease and Saves Lives

One of the greatest advances in diagnostics is the ability to prevent disease by detecting changes in the body even before patients experience first symptoms, and molecular technologies like QIAGEN’s QuantiFERON-TB Gold for detection of latent tuberculosis or digene HC2 HPV Test for detection of HPV which causes cervical cancer carry screening to a whole new level of sensitivity and accuracy. HPV is the primary cause of cervical cancer, the second most common malignancy among women globally. Cervical cancer strikes nearly 500,000 women a year and contributes to 270,000 deaths annually. By detecting HPV infection,

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screening enables close monitoring and early treatment before cervical cancer can develop, protecting women from debilitating illness or death.

The value of HPV testing is increasingly recognized around the world, and QIAGEN is a leader in the expansion of screening. In 2011, QIAGEN’s market-leading digene HC2 HPV Test, the “gold standard” in testing for high-risk types of HPV, passed a milestone of more than 80 million kits delivered since the assay became the first HPV test to receive U.S. regulatory approval in 1999. In the U.S., where treatment guidelines recommend that women receiving the traditional Pap test also undergo periodic HPV testing, market conversion efforts have led to approximately 45% of women receiving co-testing. Other countries have established or are evaluating co-testing, primary screening or reflex HPV screening as a cornerstone of cervical cancer prevention. In late 2011, QIAGEN launched the QIAensemble Decapper, the first instrument to automate the tedious process of manually handling clinical liquid sample vials. Several other automation enhancements are being developed as part of the QIAensemble program.

QIAGEN has also been proactive in expanding access to HPV screening in emerging markets, creating the careHPV test for use in regions with limited healthcare resources and only basic infrastructures. In 2011, QIAGEN also submitted careHPV for regulatory approval in China. In Latin America, Asia and Africa, QIAGEN is working with health agencies to enable the use of its HPV tests for cervical cancer prevention in settings where limited care is available.

In 2011, QIAGEN added an important new growth driver in Prevention with the acquisition of Cellestis, an Australian bio-tech company whose patent-protected pre-molecular technology is capable of detecting many diseases at earlier stages than any other diagnostic methods. The technology, known as QuantiFERON, uses the immune system’s own memory to provide critical information on latent infections, where pathogens such as bacteria, viruses or fungi are present in such low amounts that they are not detectable with DNA-based testing or other methods. The lead product, QuantiFERON-TB Gold, is a breakthrough that is already on the market for detection of latent tuberculosis (TB). The World Health Organization estimates that about one third of the world’s population carries the TB bacteria. QuantiFERON-TB Gold has regulatory approvals in major markets including the United States, Europe, and Japan, and is being endorsed by numerous healthcare bodies as a key to prevention of active tuberculosis.

Patients with latent TB are infected with the tuberculosis bacterium, but it often remains hidden for years with no symptoms. About 5% to 10% of patients with latent TB at some point develop active tuberculosis, a contagious disease that typical spreads from one active patient to 10 to 20 other people. Given the recent emergence of completely drug-resistant TB strains, screening for latent TB becomes an increasingly important pillar in the global fight against this disease.

Screening for latent TB is particularly beneficial to prevent the development of active TB in dozens of medical situations such as healthcare workers and emergency personnel; patients whose immune systems are compromised or who need drugs contraindicated with latent TB; and populations whose living situations may expose them to tuberculosis (e.g., in the military, nursing homes or prisons). The potential global market in latent TB screening is estimated at 50 million tests and has still very low penetration rates. QuantiFERON-TB Gold had pro forma full-year net sales of approximately $55 million in 2011 and grew at a strong double-digit pace. Meanwhile, QIAGEN is actively pursuing additional applications for the QuantiFERON

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“WITH PERSONALIZED HEALTHCARE, THE PATIENT DOESN’T HAVE TO ENDURE THE PROCESS OF WAITING AND WATCHING TO SEE WHAT WORKS, WHILE ALSO SUFFERING THROUGH THE SIDE EFFECTS, WHICH ARE OFTEN SIGNIFICANT.”

technology, including the U.S. regulatory submission of the QuantiFERON CMV test along with a complementary DNA-based molecular diagnostic test in 2012. The benefit of advanced diagnostics for Prevention continues to grow as discoveries reveal more about the relationship of bio-markers and genetic information to the potential for disease present in the body.

Profiling Pinpoints the Type and Severity of Diseases

QIAGEN’s portfolio of more than 120 diagnostic tests, particularly the artus line of assays for infectious diseases, makes it a global leader in Molecular Diagnostics for Profiling. QIAGEN assays enable laboratories and physicians to pinpoint the type and severity of many diseases in symptomatic patients. QIAGEN’s offering includes tests for human immunodeficiency virus (HIV), hepatitis B (HBV), hepatitis C (HCV), and many other targets. The range of tests is being expanded for Profiling, such as through the submission of the artus Influenza assay in 2011 for FDA clearance. In the case of influenza and also many other tests, these assays are already marketed in Europe and Asia and are now being submitted to the regulatory approval process in the U.S.

QIAGEN’s business is also expanding in emerging markets. In China, QIAGEN gained regulatory approval in 2011 for its second-generation hepatitis C test, the careHCV RT-PCR Kit V2. Developed and manufactured by QIAGEN in China, the HCV kit is part of the care line of products addressing specific healthcare and testing needs of countries with limited resources or healthcare infrastructure.

Many of QIAGEN’s assays are already compatible with QIAsymphony RGQ, combining content with platform to build a growing presence in hospitals and clinics. QIAsymphony RGQ enables laboratories to consolidate Profiling tests into a streamlined workflow. The platform was launched with a comprehensive infectious disease panel, which is also useful in transplantation medicine, and this menu is being expanded with Personalized Healthcare assays.

‘Personalized’ Makes all the Difference

QIAGEN is in the vanguard of creating innovative molecular technologies to detect biomarkers that can predict the success or failure of treatments – guiding doctors to use the right drugs in the right patients. Sales in Personalized Healthcare reached approximately $75 million in 2011 – and are growing rapidly. “The healthcare system is fighting increasing costs. Since you don’t want to ration care, the only viable option to address this issue is to get more efficient in treatment, to be smarter in the way we provide care,” Dr. Welsch says. Personalized Healthcare and companion diagnostics support the approach of getting more efficient and effective in the way we treat cancer and other diseases.

QIAGEN’s leadership in Personalized Healthcare springs from a broad range of tests covering more than 30 biomark-ers already marketed in select regions of the world, as well as more than 15 projects under way to co-develop and market companion diagnostics with leading pharmaceutical and biotech companies such as Amgen, AstraZeneca, Boeh-ringer Ingelheim, Bristol-Myers Squibb, Eli Lilly and Company, and Pfizer. Companion diagnostics are taking hold first in cancer treatments, where the pressure to innovate is driven by poor patient outcomes due to low response rates with major chemotherapy drugs and by the high cost of therapies, both in financial impact and side effects for patients. Other diseases such as autoimmune and central nervous system disorders also are starting to leverage genomic data to individualize treatments. QIAGEN is rapidly building leadership in Personalized Healthcare around its therascreen brand of companion diagnostics, a family of assays designed to run on QIAsymphony RGQ and other QIAGEN instruments.

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In 2011, two PMA (Pre-Market Approval) applications were submitted to the FDA for companion diagnostics to detect mutations of the KRAS gene, which are common in cancer patients. The therascreen KRAS RGQ kit is paired with two novel drugs for use in treating metastatic colorectal cancer, one marketed by Bristol-Myers Squibb/Eli Lilly and the other by Amgen. As much as 40% of all colorectal cancer patients have KRAS mutations that make their cancers unresponsive to such treatments. U.S. regulators are expected to decide on marketing approvals in 2012. The KRAS biomarker is also at the center of a co-development agreement with Pfizer in another therapeutic area. QIAGEN is working on a companion diagnostic for submission to the FDA in non-small cell lung cancer (NSCLC). QIAGEN and Pfizer entered a collaboration agreement in 2011 to co-develop a KRAS assay paired with an investigational compound in global clinical trials for NSCLC. About 85% of lung cancers worldwide are classified as NSCLC, with a five-year survival rate of only about 15%. To date, QIAGEN markets a broad range of tests for Personalized Healthcare and research applications covering more than 30 different biomarkers, including CE-marked assays for KRAS among colorectal cancer patients, EGFR in non-small cell lung cancer (NSCLC) and BRAF in malignant melanoma. This portfolio also includes several assays based upon the Pyrosequencing technology, among others tests for detection of variants and quantification of methylation levels in genes associated with Alzheimer (APOE), Glioblastoma (MGMT), cardiovascular disorders (MTHFR), and other diseases. In 2011, Japan, one of the largest markets for companion diagnostics, approved the therascreen KRAS Mutation Detection Kit and the thera-screen EGFR Mutation Detection Kit RGQ to help guide cancer treatments. EGFR, or epidermal growth factor receptor, has been shown to play an important role in certain cancers and is the target of many new anticancer drugs.

Even as these companion diagnostics are emerging from the pipeline, QIAGEN continues to invest in deepening its portfolio of biomarkers and assays. The 2011 acquisition of Ipsogen added approximately 80 assays covering 15 bio-markers associated with various blood cancers, leading to an immediate partnership to develop its JAK2 biomarker as a companion diagnostic for an investigational drug compound under development by Eli Lilly & Company. In addition, QIAGEN gained an exclusive option in 2011 to all biomark-ers emerging from the Berlin based startup Alacris Theranos-tics GmbH, which is mining vast amounts of genomic data and large clinical sample sets in its cancer discovery efforts.

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“CLINICAL LABS HAVE COME TO KNOW QIAGEN FOR OUR QUALITY AND RELIABILITY. NOW WE ARE STRENGTHENING OUR POSITION WITH THERASCREEN COMPANION DIAGNOSTICS AND OTHER TESTS IN AREAS SUCH AS PROFILING AND PREVENTION.”

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t MOLECULAR DIAGNOSTICS OVERVIEW

Personalized Healthcare is clearly gaining momentum. The pharmaceutical industry and leading researchers have embraced molecular testing to guide the use of new drugs in cancer and other diseases. Private and public payers are also increasingly open to reimbursement for companion diagnostics. Dr. Welsch expects economics to become an increasingly strong growth driver. In colorectal cancer alone, she says, Personalized Healthcare promises about $600 million in annual savings in the U.S. only. The availability of FDA-approved tests will provide more reliable, standardized results for patients; much less expensive assays for payers; and efficient, easier-to-run tests for laboratory personnel.

“We’ve been talking about personalized medicine since the sequencing of the human genome early in the last decade. Only recently has it started to become cost-effective,” Dr. Welsch says. The U.S. market for companion diagnostics is expected to grow ten-fold in just six years, from about $150 million in 2009 to roughly $1.5 billion in 2015, according to the consulting firm Frost & Sullivan.

QIAGEN Focuses on the Future

Working at the heart of QIAGEN’s effort to transform health-care, Dr. Welsch finds a parallel activity when she goes home and recharges: She likes to unwind by running. Living in suburban Washington, D.C., an area of active lifestyles combined with a family-friendly environment, Dr. Welsch and her husband are raising “two adorable little girls,” ages 2 and 4. Running usually takes Dr. Welsch out on a 5 K or a 10 K competition, though recently she completed a marathon. Like the sport of running, transforming the world of medicine requires dedication, discipline and endurance. The work is exciting but intense. No two trails are alike. A focus on the destination fuels Dr. Welsch’s sense of hope. She thrives on the rapid progress in Personalized Healthcare. Life is improving for the patients, who still catch her eye. Spending her days educating doctors and healthcare executives on the value of the genomic revolution, Dr. Welsch knows it’s a marathon: “We are just at the beginning of this new wave.”

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60,000

DIFFERENT GENE-SPECIFIC ASSAYS AVAILABLE THROUGH QIAGEN’S GENEGLOBE ONLINE PORTAL

Shanghai is bustling. In the world’s largest city, 23 million people are making their way daily through crowded streets, driving the dramatic transformation of China’s largest city into an economic, commercial and financial center. For Songkai Liu, Ph.D., Shanghai is also undergoing a dramatic transformation – to become a new center for drug discovery and research. Pharma companies are increasingly moving R&D operations to Shanghai, building networks with major research universities, contract research organizations (CROs) and other pharmaceutical companies as this vibrant city emerges from its unique colonial past.

Dr. Liu is well suited for his role as QIAGEN’s business manager for key accounts with Pharma customers in Asia-Pacific. With a Ph.D. in molecular biology, he has extensive hands-on experience working in the R&D laboratory of a major pharmaceutical company. He is also glad to be back home in China after having studied and worked in Europe and the United States. “My industry background is a plus. Before I came to QIAGEN, when I was working in R&D, I was the customer, so I know what my former colleagues are thinking and the increasingly complex environment in which they are working,” Dr. Liu says. “It now goes beyond having to address the scientific demands for assays and instruments used in laboratories. Purchasing departments are increasingly playing a more active role in decisions, so more and more we must consider the business side and not just the technical point of view of our customers. Given my experience as a former customer, I can appreciate this fast-changing environment and better understand how QIAGEN can address a broad range of customer needs.” Dr. Liu’s job as a business manager is to provide full business solutions to meet the needs of Pharma companies and CROs. He interacts with people at multiple levels – not just lab directors – and crosses functional lines to coordinate sales representatives, customer support and commercial interactions. Globally, QIAGEN is helping the Pharma industry move forward drug discovery to create a new era of innovation. The Pharma customer class contributed 20% of sales in 2011, with net sales rising 4% at constant exchange rates (CER).

World of Pharma R&D is Changing

Under intense economic pressures, pharmaceutical and bio-tech companies worldwide are making more critical assessments of R&D spending and working to be more productive in creating new drugs. QIAGEN is partnering with the industry by providing fast, automated technologies and efficient processes. The pharmaceuticals industry faces multiple chal-

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lenges: The economic slowdown and austerity measures are squeezing government and private budgets for drugs. Several companies are losing revenues due to patent expirations on blockbuster products, mergers and acquisitions are driving the consolidation of R&D activities, and investors are questioning a lack of new drug approvals and return on investment in R&D.

As a result, the pharmaceuticals industry has slowed spending on R&D in recent years, and most of the top companies announced cuts in R&D spending and staff levels in 2010 or 2011. The pressures are ongoing. In its “2012 Global R&D Funding Forecast,” the Battelle Institute projects a 2.2% decline in R&D spending by the global life science industry this year (including an anticipated 5.7% decline in the U.S.). Pharma and biotech companies are responding by closing R&D sites, canceling some projects to focus pipelines more tightly, and seeking approaches to reduce risk. Large firms are looking to smaller biotech companies as sources of new products and also outsourcing more activities by hiring universities and CROs to do work ranging from discovery research to clinical trials. This more “virtual” or “open” approach to innovation makes relationships in the pharmaceutical industry more complex. For QIAGEN, these changes in Pharma present challenges – but also many new opportunities.

QIAGEN Tools Make R&D More Effective

QIAGEN is in the forefront of helping Pharma transform R&D. The molecular biology revolution has opened up new ways of understanding diseases and the biological pathways associated with them, and QIAGEN’s technologies for exploring those pathways are accelerating the creation of new drugs. Companies use QIAGEN tools across the entire R&D continuum: to identify and validate molecular targets, discover potential drugs and measure their activity, select patients for clinical trials and monitor disease progression, and finally market pharmaceuticals paired with companion diagnostics for greater safety and efficacy.

QIAGEN invests continually in expanding its portfolio of biomarkers – molecules such as nucleic acids or proteins that indicate cell processes or biochemical pathways associated with diseases – and designing technologies to detect and measure these markers. Biomarkers serve as an engine of innovation. Biomarkers translate into relevant new test content for Pharma R&D. The acquisition in 2010 of SABiosciences brought more than 100 assay panels for

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“MY INDUSTRY BACKGROUND IS A PLUS. BEFORE I CAME TO QIAGEN, WHEN I WAS WORKING IN R & D, I WAS THE CUSTOMER, SO I KNOW WHAT MY FORMER COLLEAGUES ARE THINKING AND THE INCREASINGLY COMPLEX ENVIRONMENT WHICH THEY ARE WORKING.”

high-performance analysis of DNA, RNA, epigenetic, and microRNA targets in pathways associated with specific diseases. In 2011, QIAGEN acquired a strategic stake in Alacris Theranostics, an innovative startup focusing on full genome-based cancer therapies, including an exclusive option to Alacris’ pipeline of biomarkers – the next generation of tests for discovery of drug targets and development of companion diagnostics.

QIAGEN’s GeneGlobe online portal, which in 2011 has seen the integration of the SABiosciences PCR assay panels and the implementation of new features for improved usability such as research and presentation tools, adds value for Pharma scientists with an industry-leading source of information on disease pathways, biomarkers and genomic information. GeneGlobe provides searchable, annotated data on 60,000 pathway and gene-related technologies, with links to order products related to each avenue of investigation. Additionally, QIAGEN offers Pharma comprehensive automation solutions to streamline workflows and novel solutions for quality control in bioprocessing. The rollout of QIAsymphony RGQ helps labs to accelerate projects and reduce staff time, the compatible Certal product line introduced in 2011 brings a new level of speed, efficiency and reliability to quality control of cell-culture-based biotechnolo-gy products, biopharmaceutical protein drugs and cell lines for vaccine production. Pharma labs are also benefiting from the new QIAxcel Advanced to streamline analysis of DNA and RNA, and new PyroMark platforms for applications in oncology, microbiology and pharmacogenetics.

QIAGEN Serves Pharma as a Full Partner

Innovation in QIAGEN technologies has transformed the company’s position from a component supplier to a full partner in pharmaceutical R&D solutions. As the Pharma industry responds to economic challenges in R&D, QIAGEN is partnering with its customers to support new ways of doing business – while driving innovation. QIAGEN’s commercial focus makes the company a preferred partner for Pharma companies implementing practices to help control R&D spending and ensure maximum value. QIAGEN works with global supply chains and invests in capabilities such as e-marketing and e-ordering to connect with procurement systems for customers.

Going beyond traditional sales calls targeting scientists, QIAGEN business managers address Pharma customers’ needs to demonstrate value and return on investment in laboratory platforms. Dedicated specialist teams work with decision makers across functions in Pharma companies, as well as outside collaborators.

“Today’s Pharma is far more complicated than it used to be,” Dr. Liu says. “You cannot just work with the pharma company itself – so much of the work is being outsourced to CROs or universities. We have to serve a broad range of customers

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that are involved in pharmaceutical R&D activities. As a business manager, you track all these project flows. It’s never just one stop.”

The increasing importance of genomic information in discovering and developing drugs – and the use of companion diagnostics paired with drugs for Personalized Healthcare – are transforming the Pharma industry with therapies targeted to be safer and more effective for specific patient groups. QIAGEN believes it is the global independent leader in partnering with Pharma companies for Personalized Healthcare, from early research into biomarkers for diseases, through clinical trials using molecular tests to select and monitor patients, through commercialization and marketing of drugs paired with companion diagnostics. The company’s relationships with Pharma and biotech customers begin in R&D laboratories but increasingly become full economic partnerships as the industry turns to designing new drugs in cancer, cardiovascular and metabolic diseases around the genomic characteristics of targeted patient groups. In more than 15 partnerships with leading companies, QIAGEN is more than a supplier of laboratory tools: It is bringing companion diagnostics to market alongside its partners’ important new drugs.

Emerging Markets Attract Pharma Business

As the pharmaceutical industry finds most of its growth coming from emerging markets, a key strength for QIAGEN is the company’s ability to work with global networks in serving Pharma customers – supported by its own presence in the markets of Asia, Latin America, the Middle East and Eastern

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“YOU CANNOT JUST WORK WITH THE PHARMA COMPANY ITSELF – SO MUCH OF THE WORK IS BEING OUTSOURCED TO CROs OR UNIVERSITIES. AS A BUSINESS MANAGER, YOU TRACK ALL THESE PROJECT FLOWS. IT’S NEVER JUST ONE STOP.”

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Europe. For example, China has gradually become a leading provider of pharmaceutical R&D services to the world. Most of the growth is coming from multinational drug companies and global CROs establishing R&D operations in China. QIAGEN’s relationships in emerging markets span these diverse organizations to provide full solutions for Pharma R&D in an era of outsourcing and collaboration.

“Pharma companies and CROs working in China often approach purchasing with a global perspective,” Dr. Liu says. Local lab directors or buyers often have to coordinate with their headquarters in Europe or North America and with colleagues around the world. This adds complexity to the relationships with pharmaceutical customers and can be challenging at times. One of the QIAGEN business manager’s roles, he says, is to work in global networks to help customers in a new environment where information flow is also truly global.

Dr. Liu, who lives with his wife and three-year-old daughter in Shanghai, has the kind of global background that perfectly suits this multinational commercial hub and he is passionate about serving Pharma. “Pharmaceutical R&D has been facing cuts globally, but the business is in a good position to grow in China during the next five to 10 years,” Dr. Liu says. “We expect to expand and prosper along with it and play a key role in the development of new medicines.”

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The Arab Spring revolutionary movements seized the attention of the world in 2011. People around the world followed the demonstrations on television, online or in print. For IzzEddeen Othman, QIAGEN’s regional manager of international sales, the impact was much closer to home. Mr. Othman supports QIAGEN customers in Egypt, Libya, Syria, Yemen and several other countries that became hotspots among the dramatic changes during 2011. QIAGEN’s Middle East region comprises 14 countries with 400 million people. Living with his wife and two children in Jordan, the recreational boxer travels the Middle East and stays in close contact with QIAGEN customers across the region.

“The Arab Spring shut down the normal business processes in several countries during a period of many weeks during 2011. We had no shipments into Libya during the war, while Egypt was frozen during the revolution,” Mr. Othman says. “However, the situation has been improving after these temporary business disruptions, and the long-term business outlook is more positive than ever before. Governments are moving to make bigger investments in healthcare, create a more supportive environment for life science research, and other policy actions that genuinely aim to benefit the populations of these countries.”

Coming out of the turmoil of 2011, Middle Eastern countries are pursuing a path common to many of the high-profile emerging markets. Whether in Latin America, Asia or North Africa, developing countries often invest in intellectual capital as a strategy for long-term economic and social progress. The investments create modern infrastructures, often leapfrogging older technologies and scientific tools to implement the latest breakthroughs.

“Governments are growing in their understanding of the importance of life sciences research, and in particular publishing that research and finding commercial applications. They know that life science research can improve medical care as well as the quality of their universities, and this can be very beneficial to their people,” Mr. Othman says.

Academia is a Driver of Innovation

Just like in many other countries, academic researchers are at the very forefront of this development. Universities and other research institutions are where many of the world’s top scientists are performing breakthrough research that is helping to unlock the molecular secrets of life. They are continuously extending the boundaries of our knowledge, ultimately spurring the development of new trends or entire

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400

MILLION PEOPLE LIVE IN QIAGEN’S MIDDLE EAST REGION WITH 14 COUNTRIES.

areas of research. To achieve high-quality results in the shortest time, however, scientists require reliable, cost-efficient and easy-to-use research tools. This is why QIAGEN technologies have been an integral part of many breakthrough discoveries since the beginning of the molecular revolution, and the company aims to continue to be a partner of choice for years to come. Close ties to the academic research community provide significant benefits for QIAGEN as well. Through collaborations with academic institutions, QIAGEN can identify and address emerging trends in life science research and help set new standards, which can then later be disseminated to the other customer classes of Molecular Diagnostics, Pharma and Applied Testing.

Collaborations with leading scientists exist across a wide array of research fields and applications, including fundamental research into molecular pathways of many diseases, veterinary and forensic testing, and translational studies for the development of new diagnostics and drugs. Many existing partnerships also support high-profile research. For example, following the Japanese earthquake and tsunami in 2011, QIAGEN joined forces with an international team that aims to study the genetic impact of radioactivity on animals and plants near the Fukushima Daiichi Nuclear Power Station.

QIAGEN is also collaborating with Wheaton College to establish genetic fingerprints for animal species to support conservation efforts in North America, or with international teams that work on the development of novel assays for detection of gene doping in sports.

QIAGEN’s close relationships with the academic research community pay off. Despite budget pressures from government austerity measures in 2011, QIAGEN sales to the Academia customer class rose 2% CER, representing 26% of total sales, underpinned by a differentiated product portfolio. Life science researchers look to QIAGEN test kits for highly reliable, reproducible results in areas such as epigenetics, gene pathway analysis, miRNA or gene expression and function, as well as the expertise of the company’s customer service employees, who speak the language of science and often help lab personnel solve tough problems. Instruments for efficient automated work-flows also save valuable time compared with traditional manual procedures.

An important tool to help outreach efforts to scientists in Academia is QIAGEN’s unique GeneGlobe online portal, which was further expanded in 2011 and builds upon the

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“GOVERNMENTS ARE GROWING IN THEIR UNDERSTANDING OF THE IMPORTANCE OF LIFE SCIENCES RESEARCH, AND IN PARTICULAR PUBLISHING THAT RESEARCH AND FINDING COMMERCIAL APPLICATIONS. THEY KNOW THAT LIFE SCIENCE RESEARCH CAN IMPROVE MEDICAL CARE AS WELL AS THE QUALITY OF THEIR UNIVERSITIES, AND THIS CAN BE VERY BENEFICIAL TO THEIR PEOPLE.”

expertise acquired with SABiosciences in 2010. GeneGlobe provides searchable information on some 60,000 assays, including intense annotation and references, based on extensive data mining. Researchers can match these assays against their molecular targets and laboratory samples to generate reliable, reproducible results. The GeneGlobe data link to online direct-ordering for test kits. Life science researchers have responded enthusiastically to GeneGlobe, and sales through this channel are growing rapidly.

In 2011, QIAGEN also introduced several new assays for investigation of a wide range of disease pathways. Additionally, the company launched new portfolios consolidating technologies for miRNA profiling, DNA methylation and reverse gene transcription, techniques often used in life science research. Advanced instrument systems, designed to save time and effort in laboratories, are attractive to universities and institutes facing tight budgets. Academic customers – particularly in areas related to clinical research and translational medicine – contributed significantly in 2011 to the highly successful rollout of QIAsymphony RGQ, which streamlines workflows by providing automated sample-to-result processing.

Academic Research Helping to Advance Societies

Innovation in emerging markets tends to follow a pattern driven by education: Students often leave to gain scientifis training in other parts of the world, then return to apply their knowledge for the benefit of people in their home countries. The process builds critical mass in developing countries’ universities. In the same way, Mr. Othman believes many young people who have left the Middle East for a time will bring their dreams home and build critical mass for scientific education and research in a more supportive environment. Leaders in the region are making this repatriation of knowledge an explicit goal. In Saudi Arabia, QIAGEN’s second-largest market in the Middle East following Egypt, life science research is growing significantly with support from the government – and help from QIAGEN technologies and expertise.

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For example, the Saudi government has created the King Abdullah University of Science and Technology (KAUST) as a center for graduate education and research. Since 2009, KAUST has attracted scholars from around the world to focus on life sciences, engineering, computer and physical sciences. In 2011, QIAGEN contributed to a life science research study by helping KAUST researchers network with clinicians in Molecular Diagnostics labs around the Kingdom of Saudi Arabia, Mr. Othman says. The scientists needed to connect with the hospital labs to gather a diverse selection of samples, and the doctors in the field were eager to help because they saw the value of the research for helping their patients. “We showed the scientists at KAUST that our automated systems, particularly the QIAsymphony, work very well for these sophisticated labs in the biggest hospitals of Saudi Arabia,” Othman says. “It was a win-win engagement with Academia and the molecular diagnostics community in this country.”

Emerging Market Strategy Delivers Growth

Driving the further expansion of QIAGEN’s footprint in emerging regions has been one of the company’s main strategic initiatives in 2011 and will also remain a priority going forward. When expanding its market presence, QIAGEN is implementing a proven approach to the rapidly growing needs of emerging markets for Sample & Assay Technologies: During early stages, QIAGEN will not only work through networks of national distributors but also cultivate academic researchers. Sales in the Middle East region have seen strong double-digit growth over the past three years (not counting the 2009 surge in H1N1 flu-related products). Mr. Othman’s team works through distributors

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“WE SHOWED THAT OUR AUTOMATED SYSTEMS, PARTICULARLY THE QIASYMPHONY, WORK VERY WELL FOR THESE SOPHISTICATED LABS IN THE BIGGEST HOSPITALS OF SAUDI ARABIA . IT WAS A WIN-WIN ENGAGEMENT WITH ACADEMIA AND THE MOLECULAR DIAGNOSTICS COMMUNITY IN THIS COUNTRY. ”

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but also provides demonstrations and support directly to customers, aided by his background as a Biology major who worked in a genetics laboratory for a specialty hospital.

In other emerging markets, QIAGEN has progressed from working with distributors to establishing a direct presence with subsidiaries and more extensive commercial, manufacturing or R&D operations.

In India, for example, QIAGEN established a direct presence in 2011 to build upon relationships in one of the world’s fastest growing economies. With 1.2 billion people, India’s rapidly expanding healthcare infrastructure, academic R&D, Pharma industry and Applied Testing markets make it attractive for expansion. QIAGEN expects a growth trajectory in India similar to its successful experience in China over the past several years. QIAGEN also launched a direct presence in Taiwan in 2011.

Mr. Othman says the Middle East is not at that stage yet – it may take a few years of building the business. But the growth of academic research and medical innovation holds great promise for the Middle East and other developing regions. The relationships QIAGEN is building in these markets, Mr. Othman says, can only grow stronger based on an established leadership in life science R&D.

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~50

ADDITIONAL EZ1 ADVANCED XL INSTRUMENTS WERE INSTALLED IN JAPAN FOLLOWING THE TSUNAMI DISASTER TO AID THE IDENTIFICATION OF VICTIMS.

March 11, 2011, is etched in memory for Naohito Isoyama. It was a normal day for the 39-year-old QIAGEN manager, who was working with his team to help customers adopt automated systems for molecular testing. At 2:46 in the afternoon, the world changed. A violent jolt struck the QIAGEN headquarters for Japan on the 6th floor of an office tower in downtown Tokyo as seismic waves rolled in from an earthquake centered more than 200 miles away. Everything started to shake. Books and computer monitors fell off desks. Employees crawled under desks for protection.

“It shook for a very long time, more than five minutes. Earthquakes are common in Japan, but this one felt worse than any I could remember,” Mr. Isoyama says. When the shaking stopped, damage was minimal in the QIAGEN office in Tokyo, and no one was hurt. At the warehouse in a nearby suburb, some QIAGEN instruments and test kits were damaged, but again the people were safe. But as the world now knows, the 9.0 magnitude Tohoku quake was just the beginning. About 40 minutes later, a wall of water up to 35 meters high crushed cities and devastated countryside in northeast Japan, triggered a nuclear crisis at the Fukushima power plant and drove tens of thousands of people from their homes. The count of confirmed dead would surpass 15,000, while several thousand are still missing. In the aftermath of the March 11 disaster, QIAGEN came to play a significant role in the recovery of Japan as employees provided advanced forensic tools and support that were critical for the identification of victims.

DNA Technologies Support Recovery

QIAGEN is a global leader in molecular technologies for human identification and forensics as part of the Applied Testing customer class, which also encompasses veterinary and food safety testing. Forensic laboratories around the world rely on QIAGEN instruments, sample extraction and assay kits to make identification after wars, crimes and disasters. Examples abound: the war in Bosnia-Herzegovi-na, Hurricane Katrina, the September 2001 attacks on the U.S., and the 2004 Indian Ocean tsunami.

Japan’s National Research Institute of Police Science, which oversees forensic procedures in the country, had chosen QIAGEN back in 2003 to install EZ1 series instruments for

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DNA sample processing in Japanese police labs. At the time, police in Japan had only used DNA testing in the most serious crimes, although in recent years authorities have been increasingly turning to DNA for the evaluation of evidence. After the earthquake and tsunami, the government turned to QIAGEN again to expand its capabilities with an emergency purchase of nearly 50 EZ1 Advanced XL instruments. EZ1 is widely used in forensics because of its accuracy, reliability and ease of use. “After the disaster, EZ1 Advanced XL instruments were installed in police science labs in every prefecture of Japan. The labs have appreciated the high quality of our instruments, kits and support service,” Mr. Isoyama says.

As authorities recovered the bodies, police science labs extracted DNA using the EZ1 instruments and compared genetic patterns with DNA records for the victims or relatives to make identification and provide closure for families and communities. The recovery effort in Japan is a dramatic example of what QIAGEN molecular technologies do around the world for commercial and governmental customers in the market segment known as Applied Testing.

Innovative Applications Offer Safeguards

Applied Testing, which represented 7% of QIAGEN’s total sales in 2011, promises to provide strong growth momentum in the coming years. QIAGEN’s innovative technologies offer growth opportunities at the intersection of molecular biology with daily life applications. QIAGEN products help safeguard the safety of food people buy in grocery stores, protect the health of livestock, and make human DNA identifications when society needs certainty. Customers in Applied Testing combine a commercial approach that demands speed and efficiency in molecular testing with a requirement for highest-quality results, since sample material can be scarce or challenging, and DNA identification as well as other applications can have important consequences for individuals and society. QIAGEN is strategically introducing waves of new content to these customers with a growing portfolio of test kits for forensics, food safety and veterinary applications.

HUMAN IDENTIFICATION AND FORENSICS – The market for “genetic fingerprinting” is changing dramatically through the harmonization of forensic testing standards, creating an

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“AFTER THE DISASTER, EZ1 ADVANCED XL INSTRUMENTS WERE INSTALLED IN POLICE SCIENCE LABS IN EVERY PREFECTURE OF JAPAN. THE LABS HAVE APPRECIATED THE HIGH QUALITY OF OUR INSTRUMENTS, KITS AND SUPPORT SERVICE.”

opportunity for QIAGEN in 2011 and 2012. In an effort to standardize DNA databases for investigations and thus facilitate the exchange of data between countries, forensic labs in the European Union must switch to new DNA identification procedures that meet rules known as the European Standard Set (ESS).

QIAGEN is a leader in forensic DNA sample processing and testing. Its Investigator range of kits for forensic applications provides a most comprehensive and versatile coverage of the latest standards in human ID. In 2011, the product offering was further expanded by the introduction of the Investigator ESSplex Plus assay, an improved version of its ESS-compliant kit to generate human DNA profiles with an extremely high sensitivity. The ability to generate full profiles even from the lowest amounts of DNA is a key requirement in human ID testing, since sample material can often be scarce or highly degraded. In addition, QIAGEN also introduced the Investigator Quantiplex Kit, a highly sensitive test that confirms whether a sample contains enough DNA to enable analysis by investigators. Standardization of forensic procedures represents a growth opportunity. The human identification market is estimated at $300 million in Europe alone, and QIAGEN expects harmonization to spread to other markets.

FOOD SAFETY – Demand for safety testing in the human food chain is growing as consumers become more aware, legal requirements tighten and food manufacturers deal with complex ingredients and supply chains. Following a 2010 acquisition of more than 70 food safety assays, QIAGEN continues to expand the range of tools for highly specific, sensitive real-time PCR analysis that food manufacturers and laboratories can use to ensure a safe food supply from farm to fork. In 2011, QIAGEN launched 12 new mericon test kits for reliable detection of pathogens, Genetically Modified Organisms (GMO), and various plant and animal ingredients. Recent deadly outbreaks of food-related infections in Europe and the United States highlight the urgent need for safeguards. Amid the unprecedented 2011 outbreak of enterohemorrhagic E. coli in Europe, QIAGEN’s mericon VTEC Kit served as a complete assay to detect – or rule out – the presence of the toxic strains.

VETERINARY DIAGNOSTICS – Diseases in livestock, which can economically devastate whole regions and threaten food supplies, drive the increasing demand for faster, more reliable detection technologies. QIAGEN addresses these needs with its cador product line and is strategically positioned to further expand its presence in molecular veterinary diagnostics with expertise and new products. In 2011, Applied Testing launched a new product tailored to the special challenges of veterinary samples such as whole blood. The QIAamp cador Pathogen Mini Kit analyzes viral DNA or RNA and bacterial DNA in a highly efficient process for veterinary customers. Veterinary applications of QIAGEN technologies are proliferating as agricultural studies focus on tracking livestock diseases, authorities step up efforts to contain outbreaks, and Point of Need technology makes molecular testing in the field more feasible. QIAGEN plans to expand its offering in this segment.

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Automated Platforms Drive Dissemination

QIAGEN’s advanced instrument platforms are driving dissemination of molecular technologies in Applied Testing. Tasks such as DNA extraction and analysis were time-consuming and labor-intensive in the past, but are now quick and efficient with the use of devices such as the EZ1, QIAcube and the new QIAsymphony RGQ.

“When I started in 2001, only the big institutes had our instruments. A customer had to spend a lot of time to prepare an instrument for each use. Now our instruments provide much easier handling, and the customer base has changed to a much broader variety of labs,” Mr. Isoyama says.

As in Japan’s emergency expansion of its human identification capabilities with the purchase of more EZ1 devices for police labs in 2011, commercial and industrial customers worldwide are attracted to QIAGEN platforms by their ease of use, efficient workflows and proven reliability. Instruments drive the use of sample and assay kits, and QIAGEN’s broad portfolio of content drives sales of its instruments. Point of Need devices such as QIAGEN’s ESEQuant platform offer particular benefits in locations not convenient to laboratories. In 2011, for example, many schools in Russia adopted ESEQuant devices for a comprehensive drug-screening program, allowing reliable detection and quantification of opiates, amphetamines, THC and other illegal substances in urine samples within only 10 minutes.

Taking “dissemination” to new lengths, QIAGEN is also collaborating with the European Space Agency on uses of molecular detection technologies for space missions.

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“ WHEN I STARTED IN 2001, ONLY THE BIG INSTITUTES HAD OUR INSTRUMENTS. A CUSTOMER HAD TO SPEND A LOT OF TIME TO PREPARE AN INSTRUMENT FOR EACH USE. NOW OUR INSTRUMENTS PROVIDE MUCH EASIER HANDLING, AND THE CUSTOMER BASE HAS CHANGED TO A MUCH BROADER VARIETY OF LABS.”

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In 2011, QIAGEN tools aided experiments on energy self-sufficiency for space stations and on analysis of Martian soil samples for signs of life.

QIAGEN Helps Solve Challenges in Japan

Since the March 11 earthquake, calm has returned to Japan. Some disruptions continue – for example, some laboratories only run experiments at night due to the risk of power shortages. QIAGEN’s mission has expanded to helping customers deal with a broad range of issues in their daily business routines that emerged in the aftermath of the disasters. Mr. Isoyama, who has master’s degrees in food and environmental microbiology from universities in Japan and the United States, leads an automated systems team that helps scientists solve technical and business issues. He and five QIAGEN colleagues demonstrate instruments and help find solutions for laboratories throughout the country.

In his spare time, Mr. Isoyama is passionate about photography and enjoys eating out. He and his wife, who live in a suburb of Tokyo, were not directly impacted by the earthquake or tsunami. Still, they realize how all of his approximately 100 colleagues’ lives changed following the disasters, and that 2011 was a year of extraordinary effort and achievement. “I am very proud of the QIAGEN team, which many of our customers relied upon for support during an extremely difficult time,” Mr. Isoyama says. “The rebuilding efforts will continue in 2012, and the experiences and memories will last for a very long time.”

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30%

OF ENERGY IS SAVED BY QIAGEN’S NEW “GREEN” R & D AND PRODUCTION FACILITIES IN EUROPE COMPARED TO CONVENTIONAL BUILDINGS.

For Stephany Foster, doing business sustainably is about more than checkmarks on a list of rules. It’s about employees – whether in Hilden, Germantown, Shanghai, Manchester, Tokyo or more than 30 other locations around the world – understanding that QIAGEN stands for doing the right thing, and that they are responsible for creating a sustainable business that is based on a culture of accountability. Success means that customers can rely on QIAGEN Sample & Assay Technologies to deliver reliable, reproducible results. Quality products – every day, anywhere in the world – that create sustainability. “This isn’t just a check-the-box idea. It’s about trust,” says Ms. Foster, Senior Director and Head of Internal Audit for QIAGEN. “If you establish trust with a customer or employee or community, you have to focus on keeping that trust. You cannot think of ethics or compliance as something where you just check a box and it won’t affect what you do tomorrow.”

Though Ms. Foster is trained as a CPA, her job as Head of Internal Audit goes well beyond accounting. Her team does focus on the numbers, to ensure QIAGEN’s financial statements and disclosures are sound. But Ms. Foster also sees her role as translating an ethical culture into consistent daily business practices. Traveling around the QIAGEN world, she loves meeting employees face-to-face and reinforcing the value of integrity and accountability. She’s a teacher and coach in compliance and business conduct.

QIAGEN follows a comprehensive approach to sustainability, creating consistent disciplines for economic progress, environmental development and corporate citizenship. While many companies respond reactively after they encounter increased scrutiny, QIAGEN’s proactive commitment is rooted in its culture.

Sustainable Economic Relationships Succeed

Only companies that are economically sustainable – growing, profitable, creating value for shareholders, and providing economic benefits to employees and communities – can achieve their strategic objectives. Ms. Foster stays close to the economic progress of QIAGEN. Sales have nearly tripled since she joined the world leader in molecular Sample & Assay Technologies in 2005. QIAGEN has made numerous acquisitions and integrated those businesses. QIAGEN has expanded from developed markets in Western Europe and North America to emerging and highly dynamic regions in Asia-Pacific and Latin America. Different nationalities and cultures are blending into a unified global corporate culture.

“It starts with the tone at the top – the CEO, CFO and other members of the Executive Committee. At QIAGEN, we are performance-driven but always focused on doing what’s right,” Ms. Foster says. “As a company, we will push to make sure we’re meeting targets. The tone is that we work really hard to get it done, but we want to get it done right.”

In pursuing financial integrity, Ms. Foster says creating understanding is the key to ensuring sustainable practices such as sound reporting and disclosure, compliance with laws governing business conduct, and generating an atmosphere of trust in relationships with employees and customers. The business of a company with annual sales of more than $1 billion and governed by regulations in more than 100 countries is

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complex, so ensuring compliance begins with communicating policies clearly and reinforcing them with training. “We translate all policies into multiple languages. This means not just English and German, but also into Spanish, French, Turkish, Portuguese, Chinese, Japanese and Italian. We try as often as possible to offer our training in local languages, with a video component to help employees fully understand the issues,” Ms. Foster says.

Virtually all employees receive training in the Code of Ethics and confidentiality issues, while training for specialized topics such as antitrust or insider trading is tailored specifically to relevant employees, she says. In 2011, QIAGEN continued to expand initiatives related to the global rollout of corporate policies, in particular by providing new online training modules, such as those related to conflicts of interest as a result of gifts and gratuities. QIAGEN maintains hotlines for employees to report suspected violations of business policies. Ms. Foster, as part of the Global Compliance Committee, which includes functions from Legal, Human Resources, and Regulatory, reviews any potential allegations, and updates policies as needed. Globalizing business processes also helps ensure good practices. In 2011, for instance, QIAGEN implemented a new global Procurement approach to standardize purchasing with online systems.

Ms. Foster is a believer in keeping communication personal. QIAGEN is still of a size that senior managers have relationships with high-level executives around the world and are accessible to mid-level managers and other employees, she notes. Many members of the Executive Committee have an open-door policy.

“Personally I’ve been to almost every QIAGEN location,” Ms. Foster says. She has conducted financial compliance training in Germany, Turkey, Italy, China, Singapore, India, Mexico, the United States, and members of her team have gone to even more countries. “The goal for me is to give employees a face when we are discussing these topics, which are critical to our future success and ability to operate in many countries.”

Keeping up with a rapidly growing business is a constant challenge. When QIAGEN makes an acquisition, Ms. Foster’s team is quickly involved, providing training and face-to-face contact to create understanding of sound principles and

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policies for accounting, compliance, and business conduct. “I think what motivates employees the most is their own supervisor. If they respect their supervisor, they would do anything for that person – so we focus our compliance training efforts on managers,” she says. “It’s really about leadership.”

Ms. Foster, a mother of two young children who lives just outside Washington, D.C., has a love for life that she says is also part of the QIAGEN culture. She is a “sports fanatic” who enjoys watching sports as well as playing flag football and golf. She also loves to travel, which she attributes to the benefits of her mother having worked as a flight attendant. A personal milestone in 2011 was the birth of her second child. As part of the QIAGEN management team, Ms. Foster knows meeting financial targets for a quarter or year is important, but after watching the fallout from the scandals that have hit companies around the world in recent years, she believes protecting a company’s integrity is far more important. “If you want the business to keep growing, as QIAGEN has over the last 25 years, you must have integrity,” she says. “It takes only one employee to put our operations and future at risk, and my team seeks to make this clear in interactions with QIAGEN employees around the world.”

Environmental Solutions Benefit Business

Since the early days of QIAGEN, protecting the environment, as well as the health and safety of people using its products, has been a central theme. Innovations from QIAGEN, for example, have transformed the preparation of biological samples to isolate and purify nucleic acids (DNA and RNA) from a risky encounter with toxic chemicals into an automated process utilizing easy-to-use kits.

The commitment to green development approaches has expanded well beyond product safety. QIAGEN proactively manages the environmental footprint of its own operations – and products – with great care. Continual improvement initiatives have been implemented to generate energy savings as well as reduce the use of water, paper, and packaging materials. Other initiatives have focused on waste reduction, and improving transportation efficiency.

Some of the most visible enhancements take the form of “green buildings” at QIAGEN’s key sites. In 2011, QIAGEN undertook major expansion projects at its headquarters sites in Hilden, Germany, and Germantown, Maryland, by enhancing the environmental performance of buildings at both sites to improve energy and water efficiency, air quality and materials. Two new buildings in Hilden, which were inaugurated during 2011, have received gold standard certifications under the U.S. Green Building Council’s LEED (Leadership in Energy and Environmental Design) certification program, and the environmental performance of existing buildings was also upgraded. Expansion of the Hilden operational headquarters includes a new R&D facility that is considered the first “green lab” in Europe, as well as a production facility and storage building. The new production and research facilities are expected to use up to 30% less energy than conventional facilities. A special heating system is expected to save an estimated 500 tons of CO2 and 250 kilowatts of power per year.

The North American headquarters and manufacturing center in Germantown incorporate cutting-edge designs and materials to minimize energy usage and provide an environmentally

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“SUSTAINABILITY ISN’T JUST A CHECK-THE-BOX IDEA. IT’S ABOUT TRUST. IF YOU ESTABLISH TRUST WITH A CUSTOMER OR EMPLOYEE OR COMMUNITY, YOU HAVE TO FOCUS ON KEEPING THAT TRUST.”

friendly campus. The U.S. production facility saves more than 4.5 million gallons of potable water per year, for example, by using wastewater produced in the manufacturing process to cool the building. Usage of variable-frequency drives on site has helped to reduce the electric utility bill by 11%, and new mechanical systems that were installed during the ongoing site expansion are approximately 15% more efficient than standard devices.

QIAGENcares Anchors Corporate Citizenship

A sense of social responsibility is core to the mission of making improvements in life possible – primarily through QIAGENcares, an umbrella for initiatives to aid in the fight against diseases by facilitating access around the world to advanced molecular diagnostic technologies.

While QIAGENcares is open to a broad range of initiatives, the program includes a strong commitment to testing for human papillomavirus (HPV) infections. HPV is the primary cause of cervical cancer, a disease that claims about 270,000 lives every year, 80% of them in developing countries. As studies have shown, these lives could be saved if women had access to advanced screening methods. To date, QIAGEN has announced its intention to donate more than

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“PEOPLE HAVE THEIR OWN INTERNAL GUIDES AS TO HOW THEY ACT IN THE WORKPLACE, AND IN LIFE IN GENERAL. MY OBJECTIVE IS TO ENSURE THAT EACH EMPLOYEE REFLECTS ON HOW THEIR INDIVIDUAL ACTIONS IMPACT OUR REPUTATION AND TO ENSURE THEY COMPLY WITH THE LETTER – AND SPIRIT – OF OUR POLICIES.”

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1.5 million HPV tests to bring cervical cancer screening to the world’s developing nations. QIAGEN works closely with global health advocates and public health partners to select and serve appropriate recipient groups. In 2011, QIAGEN initiated a comprehensive cervical cancer prevention program in Rwanda, partnering with the country’s government and Merck, the maker of the leading HPV vaccine. QIAGEN is offering women in Rwanda 250,000 HPV tests at no charge: the digene HPV Test and the careHPV Test, a portable testing system designed to reach women where access to medical care is more challenging.

The careHPV technology, developed in collaboration with the international health organization PATH, which is partly financed by the Bill and Melinda Gates Foundation, expands access to HPV testing in regions with limited healthcare resources and infrastructure, such as no running water or electricity. In 2011, QIAGEN also joined an innovative public-private partnership to combat cervical cancer in women in sub-Saharan Africa and Latin America, particularly HIV-positive women. The George W. Bush Institute, Susan G. Komen for the Cure, and U.S. and United Nations programs are all collaborating in the initiative, which also targets breast cancer. QIAGEN’s commitment of state-of-the-art molecular screening tests for HPV will help to identify women most at risk for cervical cancer. Infection with HIV weakens the immune system and reduces the body’s ability to fight infection with HPV, and cervical cancer is 4 to 5 times more common among women living with HIV than women who are HIV-negative.

In addition to deploying the careHPV Test in humanitarian efforts, in 2011 QIAGEN submitted careHPV for regulatory approval in China, a huge market with regions where the digene HPV Test may be appropriate and others where careHPV will likely work best. Chinese regulatory approval was granted in 2011 for the careHCV RT-PCR Kit V2, a second-generation hepatitis C test also designed for use in areas with limited resources or infrastructure. In many areas where QIAGEN operates, local health, cultural and social programs are supported under a policy that defines budgets and a selection process for donations and sponsorships.

Caring is More than a Set of Rules

While implementing good corporate citizenship often means designing and following policies for sound economic, environmental or societal interactions, caring is more than a set of rules for QIAGEN employees.

Ms. Foster likes to tell a story as a metaphor for corporate efforts to ensure responsible business conduct: A certain company had a dress code requiring professional business attire for all employees. One of the men liked to show his personality by always wearing Mickey Mouse ties to work. This was not appreciated by the management team. As a result, the CEO personally rewrote the dress code, this time outlawing all ties with cartoon characters. After implementation of the policy, the man arrived at work wearing suspenders that depicted, naturally, his favorite mouse of the cartoon variety. Suspenders, he observed, were not covered in the revised dress code.

“The lesson is that you can never write enough rules,” Ms. Foster says. “People have their own internal guides as to how they act in the workplace, and in life in general. My objective is to ensure that each employee reflects on how their individual actions impact our reputation and to ensure they comply with the letter – and spirit – of our policies.”

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Growing up in the Alps of northern Italy, Francesca Di Pasquale’s passion was skiing. But along the way to earning many scientific degrees, a new passion was added in the area of molecular biology. Today, the energy and intensity of Dr. Di Pasquale are creating new products in the cutting-edge Research and Development pipeline of QIAGEN. Exploring the science of DNA and other molecules, she is passionate about solving real-life problems with molecular technologies.

“This really tiny, small world – the world of DNA – is something which you cannot see but which has a big effect in life,” Dr. Di Pasquale says. She led the development of the new Investigator Quantiplex Kit launched by QIAGEN in 2011, a real-time PCR assay that provides superior speed and sensitivity in quantifying DNA, a crucial step in analyzing “trace” evidence for forensic investigations and human identification. As a senior scientist at QIAGEN’s major site in Hilden, Germany, Dr. Di Pasquale leads a team designing new assays for Applied Testing customers, which involve solutions for a variety of human ID, food safety and veterinary testing applications. The creative process in R&D, she says, looks at unmet needs by interacting with customers, considers the molecular technologies that already exist, and designs new solutions to solve people’s problems.

Leading Our Industry in Innovation

As one of the pioneers in life sciences from the start of the biotechnology revolution, QIAGEN has been pursuing success by seeking to lead the industry in innovation – aiming to consistently deliver the best new Sample & Assay Technologies to the market across all of QIAGEN’s four customer classes. To this end, QIAGEN has been committing approximately 11% of sales to Research and Development, representing a larger percentage of sales than many competitors. R&D spending in 2011 amounted to approximately $131 million, roughly a 4% increase from 2010.

The result of sustained commitment and strategic management of R&D is that QIAGEN is completing major regulatory submissions and delivering new products to its four customer classes. Highlights that emerged from this pipeline in

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~11%

OF 2011 ANNUAL SALES INVESTED IN R&D ACTIVITIES, WELL ABOVE THE INDUSTRY AVERAGE.

2011 include the regulatory submissions of two KRAS companion diagnostics in the U.S. for guiding treatment decisions for patients with metastatic colorectal cancer; the artus Influenza profiling assay submitted for U.S. clearance; the careHPV screening test, an important Prevention product for emerging markets, submitted in China; and the launch of new products in Applied Testing, including the Investigator Quantiplex Kit which help improve forensic investigations.

Creating the DNA Quantification Kit

In its most recent innovative success, Dr. Di Pasquale’s Applied Testing assay development team began with a critical challenge in forensic work: the fact that DNA evidence often is quite limited. The goal in police labs often is to take very small amounts of biological material – such as “trace” from a phone, keyboard or cigarette butt – and use the DNA to identify a human being. The “Crime Scene Investigation” of forensic labs may lack the sizzle of television dramas, but there are similarities between solving mysteries in real life and on TV. Real investigators may not wrap up the case in 60 minutes, but they face intense time pressures and

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“THIS REALLY TINY, SMALL WORLD – THE WORLD OF DNA – IS SOMETHING WHICH YOU CANNOT SEE BUT WHICH HAS A BIG EFFECT IN LIFE.”

they often work with tiny traces of saliva or blood. The Quantiplex project began in 2010 when QIAGEN looked at its portfolio of products for human ID – with an eye on adding content in the form of new assays. The quantification of DNA, a stage between extraction of the DNA and actual identification and analysis, was a gap in the offering for forensic workflow. But what, exactly, did the market need? Dr. Di Pasquale went to a major forensics conference in Berlin and interviewed about 50 CSI and forensic scientists from around the world. At the same time, QIAGEN sales and marketing teams surveyed their forensic customers. The answers were, essentially, that CSI labs needed faster and more sensitive DNA quantification – and less expensive tools – to solve crimes. Dr. Di Pasquale’s team designed a proprietary DNA quantification test with very high standards. The highly sensitive assay is designed to confirm whether a biological sample contains enough nucleic acid to enable DNA fingerprinting analysis and to establish whether “inhibitors” (or contaminants) in the sample might require further purification before proceeding further with the analysis. The team created a controlled study to test the kit under rigorous real-life conditions at labs around the world.

“The results were really amazing. Our Investigator Quanti-plex Kit provides more sensitive results with extremely small amounts of DNA in a sample, and they are reproducible across different ethnic groups and lab conditions in various regions,” Dr. Di Pasquale says. “The competitors’ quantification takes 1-1/2 hours, while QIAGEN’s kit takes only 48 minutes. Speed is a significant advantage in forensic labs.” QIAGEN launched the product in 2011, backed by the published results of the field test in forensic labs, and Dr. Di Pasquale’s team moved on to their next project in the pipeline.

Managing Innovation for Results

In a company deeply rooted in science, Dr. Di Pasquale says, it is critical to manage the R&D process. The goal is to create value in the form of products that emerge and succeed in the marketplace – not just to conduct studies. QIAGEN’s approach to innovation focuses on results.

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THE QIAGEN SPIRIT | INNOVATION

Dr. Di Pasquale notes that the complexity of innovation has increased as QIAGEN has grown and expanded into diverse technologies and applications. At the end of 2011, R&D had more than 700 researchers pursuing several dozen projects.

QIAGEN has taken a number of actions to stimulate and manage innovation:

| • |  | Teams are at the core. Small groups like Dr. Di Pasquale’s team of specialists are dedicated to discovering and developing new technologies of value in each of QIAGEN’s customer classes.

| • |  | The “Beyond!” program helps employees throughout QIAGEN introduce new ideas for products or approaches – even if they lie beyond the company’s current lines of business. An online database of innovative ideas, accessible to everyone in R&D, promotes creativity and interaction.

| • |  | A global network of volunteers from R&D, marketing and operations gathers ideas for new, innovative products. Following the assessment of the commercial potential of these ideas, portfolio teams in each customer class – Applied Testing, for example, has teams for forensics, food safety and veterinary – refine the most promising projects to pursue.

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“IT IS IMPORTANT TO LEARN HOW TO USE THE TOOLS WE HAVE, SO WE CAN THINK OUTSIDE THE BOX AND USE OUR EXISTING TOOLS TO DO SOMETHING ENTIRELY NEW. SOMETIMES, THE NEED IS TO LOOK OUTSIDE AT WHAT PEOPLE IN THE WORLD ARE DOING AND DEVELOP COMPLETELY NEW TOOLS TO SOLVE THEIR PROBLEMS.”

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THE QIAGEN SPIRIT | INNOVATION

QIAsymphony RGQ

QIAsymphony RGQ is a breakthrough modular platform that has started a new era of laboratory automation and workflow consolidation. The highly flexible and versatile flagship instrument can process both commercial assays and a broad array from laboratory-developed tests from sample to result. It is expected to be a key growth driver during the next decade and support global expansion in all customer classes.

| • |  | Centers of excellence in locations across Europe, North America and Asia each focus on a specialty in R&D such as companion diagnostics, automated systems or pathway analysis. Working together in these centers fosters collaboration among scientists.

| • |  | Incentives such as cash and non-cash prizes encourage the creativity of QIAGEN employees and development of new ideas.

In recognition of these initiatives, QIAGEN was honored in 2011 with an award for the best innovation management in Germany. The judges in a competition sponsored by strategy consultants A.T. Kearney and the business magazine WirtschaftsWoche cited QIAGEN’s global and cross-functional innovation strategy, anchored in corporate culture, with encouragement for “out of the box” thinking by all employees.

Outstanding individual scientists also drive innovation. In December 2011, Dr. Fabienne Hermitte, cofounder of Ipsogen SA, in which QIAGEN acquired a majority stake last year, was selected for the second prize among three winners of the European Commission’s First EU Prize for Women Innovators. The judges cited her leadership in R&D as enabling Ipsogen to pioneer diagnostics for Personalized Healthcare in various cancers.

Passion for Improving Life

Dr. Di Pasquale has moved on to her next project: an idea for increasing the number of real-time PCR reactions that can run in a single vessel from six to 12, or perhaps 30. The change offers promise for increasing the efficiency of instruments and speeding up the work of laboratory personnel. “Innovation has many different levels,” she says.

“It is important to learn how to use the tools we have, so we can think outside the box and use our existing tools to do something entirely new. Sometimes, the need is to look outside at what people in the world are doing and develop completely new tools to solve their problems.” This devotion to creating new applications and new tools is good news – for QIAGEN’s sustained growth in the future and for the people whose lives will be improved. “I think every scientist here has his or her own ‘baby’ – their own products that they are working on,” she says. “And we really have a lot of passion for our babies.”

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CONTENT

OVERVIEW |  |  | 70 |
The Executive Committee |  |  | 70 |
Common Shares |  |  | 73 |
MANAGEMENT REPORT |  |  | 77 |
Business and Operating Environment |  |  | 79 |
Opportunities and Risks |  |  | 92 |
Performance Review |  |  | 98 |
Human Resources |  |  | 106 |
Future Perspectives |  |  | 108 |
GOVERNANCE REPORT |  |  | 111 |
Corporate Structure |  |  | 113 |
Managing Board |  |  | 113 |

Supervisory Board |  |  | 115 |
Share Ownership |  |  | 120 |
Additional Information |  |  | 121 |
FINANCIAL RESULTS |  |  | 129 |
Consolidated Financial Statements |  |  | 131 |
Notes to Consolidated Financial Statements |  |  | 138 |
Auditor’s Report |  |  | 183 |
SERVICE |  |  | 186 |
QIAGEN Key Figures |  |  | 186 |
Glossary |  |  | 188 |
Service |  |  | 192 |

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THE EXECUTIVE COMMITTEE

DR. ULRICH SCHRIEK Senior Vice President Corporate Business Development |  | ROLAND SACKERS Managing Director, Chief Financial Officer |  | PEER M. SCHATZ Managing Director, Chief Executive Officer |  | DR. JOACHIM SCHORR Managing Director, Senior Vice President Global Research and Development
Joined QIAGEN in 1997 and was appointed Vice President Corporate Business Development in 2000. Dr. Schriek previously held sales and marketing positions at Pharmacia Biotech. He earned a degree in Biology and obtained his Ph.D. in Biochemistry from the Ruhr University in Bochum, Germany. Dr. Schriek is a member of various industry panels and organizations, including the World Economic Forum Technology Pioneers Selection Committee and the Nanobiotechnology Initiative started by the German Federal Ministry of Education and Research. |  | Joined QIAGEN in 1999 as Vice President Finance and has been Chief Financial Officer since 2004. In 2006, Mr. Sackers became a member of the Managing Board. Between 1995 and 1999, he served as an auditor with Arthur Andersen Wirtschafts-prüfungsgesellschaft Steuerberatungs-gesellschaft. Mr. Sackers earned his Diplom-Kaufmann from the Westfälische Wilhelms-Universität Münster, Germany, after studying business administration. Mr. Sackers is a board member of the industry association BIO Deutschland. He is also a non-executive director and chair of the audit committee of Immunodiagnostic Systems Holding (IDS), a leading producer of immunological tests for research and diagnostic applications publicly listed in the United Kingdom, as well as member of the board of directors and head of the audit committee of Ipsogen S.A. |  | Joined QIAGEN in 1993 as Chief Financial Officer and was appointed a Managing Director in 1998 and CEO in January 2004. Mr. Schatz was previously a partner in a private management buyout group in Switzerland and worked in finance and systems positions at Sandoz and Computerland AG as well as in leadership positions at various startup companies in Europe and the U.S. He graduated from the University of St. Gallen, Switzerland, and obtained an M.B.A. in Finance from the University of Chicago. Through January 2012, he served as a member of the German Corporate Governance Commission. He serves as a member of the Managing Board of PMS Asset Management GmbH and holds director positions of the U.S. industry associations AdvaMedDx and ALSSA. He is also chairman of the Board of Directors of Ipsogen S.A. |  | Joined QIAGEN in 1992 and was appointed Senior Vice President Research and Development and a Managing Director in 2004. Before joining QIAGEN, Dr. Schorr worked for the pharmaceutical company Hoechst AG and also was a co-founder of Coley Pharmaceuticals, EnPharma Pharmaceuticals and QBM Cell Sciences. He holds a Ph. D. in Molecular Biology and Virology from the University of Cologne. Dr. Schorr is currently a member of the Supervisory Board of QBM Cell Sciences.

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OVERVIEW The Executive Committee

BERND UDER Managing Director, Senior Vice President Global Sales |  | DR. THOMAS SCHWEINS Senior Vice President Human Resources, Marketing, Strategy |  | DOUGLAS LIU Senior Vice President Global Operations |  | DR. MICHAEL COLLASIUS Senior Vice President Automated Systems
Joined QIAGEN in 2001 as Vice President Sales and Marketing and was appointed a Managing Director and Senior Vice President Sales and Marketing in 2004. Mr. Uder became Senior Vice President Global Sales in 2005 following a restructuring of the sales and marketing organization. Before joining QIAGEN, he served as Vice President European Biolab Sales and Marketing with Pharmacia and Vice President Global e.business with Amersham Pharmacia Biotech. |  | Joined QIAGEN in 2004 as Vice President Corporate Strategy and was appointed Vice President Marketing & Strategy in 2005. In late 2011, Mr. Schweins also assumed responsibility for Human Resources. Dr. Schweins came to QIAGEN from The Boston Consulting Group. He previously worked as a Technology Manager, and later as an Assistant to the Management Board, at Hoechst /Aventis. Dr. Schweins earned an M.Sc. degree in biochemistry from the University of Hanover. He obtained his Ph.D. at the Max Planck Society and received an M.Sc. from the University of Southern California in Los Angeles where he studied business administration and chemistry. |  | Joined QIAGEN in 2005 as Vice President Global Operations. Before joining QIAGEN, Mr. Liu worked at Bayer Healthcare as Head of Operations for Nucleic Acid Diagnostics in the U.S. and in Strategic Planning and Consulting at Bayer AG in Leverkusen, Germany. Prior to these positions, Mr. Liu worked at Abbott Diagnostics and Chiron Diagnostics in the U.S. He earned a B.S. degree from the University of Illinois and an M.B.A. from Boston University. |  | Joined QIAGEN in 1992 and was appointed Vice President Automated Systems in 2001. He led the integration and development of QIAGEN’s instrumentation business as General Manager of QIAGEN Instruments since its acquisition in 1998. Dr. Collasius graduated from the Institute for Genetics in Cologne, Germany, and obtained his Ph.D. in Chemistry from the Max Planck Institute of Biochemistry in Martinsried, Germany.

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NASDAQ
Market |  | NASDAQ
Segment |  | NASDAQ
|  | Global Select Market
Ticker |  | QGEN
ISIN |  | NL0000240000
GERMANY
Market |  | Frankfurt Stock Exchange
Segment |  | Prime Standard
Ticker |  | QIA
WKN |  | 901626
CAPITALIZATION DEC. 31, 2011
Market |  | $ 3.23 billion
capitalization |  |
Shares |  | 234,221,000
outstanding |  |
Free float |  | approx. 86%

COMMON SHARES

QIAGEN and many peers in the molecular diagnostics and life science tools segment saw share prices under pressure in 2011 from global economic turbulence. Macro-level industry drivers overshadowed QIAGEN’s significant progress on strategic initiatives to return to a stronger growth profile. Our senior executives and Investor Relations team communicate proactively and openly with the financial community.

Market Environment

U.S. and European capital markets endured yet another volatile year in 2011. Investors tried at the start of the year to shrug off Europe’s debt problems, turmoil in North Africa and the Middle East, and Japan’s earthquake, tsunami and nuclear crisis. Attention soon turned to economic weakness in the U.S. and Europe, and decelerating growth prospects elsewhere, which led to mixed equity market performances around the world. All of these factors led to ongoing weak economic conditions in the U.S. and Europe and concerns for 2012.

Although the broad U.S. equity market showed modest gains in 2011, with the S&P 500 index rising 2.1%, the Morgan Stanley Capital Index (MSCI) showed that stocks in Europe returned –10.5%, while Japan returned –14.2% and emerging market stocks trailed all other markets and returned –18.2%.

The molecular diagnostics and life science tools segment was affected by austerity in government budgets in certain parts of Europe and the U.S., as well as restrained R&D investment among pharmaceutical companies. In the healthcare industry, a sluggish economy and continued high unemployment in the U.S. dampened patient utilization of physician services and diagnostic tests.

Against the backdrop of this challenging environment, QIAGEN focused on delivering solid growth in sales and adjusted earnings (which exclude restructuring-related charges as well as the amortization of intangible assets) in 2011, while investing in strategic initiatives to further accelerate growth in 2012 and beyond. These actions included investments in creating a new long-term product cycle with the QIAsymphony RGQ automation platform, adding valuable testing content to drive growth across all customer classes, expanding geographically, especially in the most promising emerging markets, and launching a project to improve efficiency and resource allocation.

Listings in the U.S. and Europe

QIAGEN’s global shares have been registered and traded in the United States since 1996 on the NASDAQ Global Select Market (NASDAQ National Market prior to July 2006) and in Germany since 1997 on the Frankfurt Stock Exchange (and the Prime Standard segment since its launch in 2003). Dual listing on NASDAQ and the Frankfurt Stock Exchange provides advantages for QIAGEN, our shareholders and employees. The dual listing enlarges the potential market and increases liquidity for our shares. Unlike American Depositary Receipts (ADRs), QIAGEN common shares provide equal corporate rights for all shareholders and can be traded on either exchange, in U.S. dollars or euros.

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OVERVIEW Common Shares

Share Price and Liquidity

QIAGEN common shares declined in 2011, ending the year at $13.81 (– 29%) on NASDAQ and at €10.65 (–28%) on the Frankfurt Stock Exchange. At the same time, QIAGEN common shares provided high liquidity during 2011, with average daily trading volume of approximately 2.7 million shares (1.9 million on NASDAQ, 0.8 million on the Frankfurt Stock Exchange (XETRA) and 15,500 on other German exchanges). As of December 31, 2011, the free float, which affects weighting of QIAGEN shares in various indexes, was approximately 86%.

Index Membership

QIAGEN is one of the largest constituents of Germany’s TecDAX, a stock index that tracks the 30 largest German companies from the technology sector not included in the benchmark DAX index. As of December 31, 2011, QIAGEN held the No. 2 position among the TecDAX constituents based on market capitalization.

In June 2011, QIAGEN was added to the U.S. large-cap Russell 1000 and broad-market Russell 3000 indexes. The Russell 3000 index measures performance of the 3,000 largest companies in the U.S. The Russell 1000 index is a subset of the Russell 3000 index and includes approximately 1,000 of the largest securities based on a combination of their market capitalization and current index membership. In December 2011, QIAGEN was removed from the NASDAQ 100, an index of 100 of the largest domestic and international non-financial companies listed on the NASDAQ based on market capitalization, following an annual review of index constituents.

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Shareholder Structure

QIAGEN has a truly global investor base comprised of more than 300 identified institutional investors, according to NASDAQ. QIAGEN’s shareholder base has undergone a transition in recent years from significant holdings by “Growth” style investors toward investors with a “Growth at a Reasonable Price” (GARP) or “Value” orientation. Members of the Managing Board and the Supervisory Board in total held approximately 3.4% of QIAGEN’s outstanding common shares at the end of 2011.

Annual Shareholders’ Meeting

At the 2011 Annual Shareholders’ Meeting, QIAGEN shareholders followed the Board of Directors’ recommendations for all proposed resolutions, voting in favor of all resolutions with significant majorities that were often well above 95% of shares present at the meeting. Shareholders present or represented at the meeting held on June 30, 2011, in Venlo, the Netherlands, held approximately 121.8 million shares, or 52% of the approximately 233.9 million issued and outstanding common shares of QIAGEN as of the record date for the meeting.

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OVERVIEW Common Shares

KEY SHARE DATA AS OF DECEMBER 31, 2011

|  | 2011 |  |  | 2010 |
Total stockholders’ equity (in $ thousand) |  |  | 2,548,304 |  |  |  | 2,476,353 |
Issued shares |  |  |  |  |  |  |  |
Outstanding shares at December 31 (in thousand) |  |  | 234,221 |  |  |  | 233,115 |
Basic weighted average number of shares outstanding (in thousand) |  |  | 233,850 |  |  |  | 232,635 |
Year-end market capitalization (in $ million) |  |  | 3,234 |  |  |  | 4,557 |
Year-end market capitalization (in € million) |  |  | 2,494 |  |  |  | 3,410 |

NASDAQ

|  | 2011 |  |  | 2010 |
Year-end price |  | $ | 13.81 |  |  | $ | 19.55 |
High |  | $ | 22.20 |  |  | $ | 24.00 |
Low |  | $ | 12.47 |  |  | $ | 16.86 |
Average daily trading volume (in shares) |  |  | 1,877,296 |  |  |  | 1,424,444 |

FRANKFURT STOCK EXCHANGE (XETRA)

|  | 2011 |  |  | 2010 |
Year-end price |  | € | 10.65 |  |  | € | 14.63 |
High |  | € | 15.25 |  |  | € | 17.87 |
Low |  | € | 9.07 |  |  | € | 12.06 |
Average daily trading volume (in shares) |  |  | 830,955 |  |  |  | 920,000 |

Investor Relations and Transparency

QIAGEN is committed to offering shareholders, analysts and communities around the world transparent, comprehensive and readily accessible information on our strategies, performance and prospects.

In 2011, QIAGEN received an Extel Award for Excellence, ranking No. 1 for best Investor Relations practices among biotechnology companies, based on the annual Thomson Reuters pan-European survey of investors.

Our leaders recognize the importance of maintaining close relationships with investors and analysts. QIAGEN executives presented at more than 30 national and international brokerage conferences in 2011. In addition to meetings during these conferences, QIAGEN executives took part in more than 200 visits to institutional investors in Europe, the United States and Asia, and were also involved in numerous calls. In total, these activities resulted in more than 900 direct discussions with investors and analysts.

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QIAGEN held in-depth conference calls to discuss quarterly results during 2011. An analyst and investor day was hosted in November at the annual meeting of the Association for Molecular Pathology (AMP) in Dallas, Texas. More than 50 financial industry professionals attended the event focused on strategic initiatives and QIAGEN’s growing presence in Molecular Diagnostics. All QIAGEN-hosted investor presentations are accessible as web-casts on www.qiagen.com.

More than 30 analysts from international brokerages followed QIAGEN in 2011. At year-end, approximately 30% of the analysts covering QIAGEN recommended buying QIAGEN common shares, while approximately 60% had “hold” or “neutral” recommendations and 10% had “sell” or “under-perform” recommendations.

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MANAGEMENT REPORT

Business and Operating Environment |  |  | 79 |
Opportunities and Risks |  |  | 92 |
Performance Review |  |  | 98 |
Human Resources |  |  | 106 |
Future Perspectives |  |  | 108 |

##### Table of Contents

MANAGEMENT REPORT Business and Operating Environment

MANAGEMENT REPORT

Business and Operating Environment

Overview

QIAGEN is the world’s leading provider of Sample & Assay Technologies. Our products and systems are playing a pivotal role in the biology revolution by empowering customers to transform raw biological samples into valuable molecular information. QIAGEN technologies allow healthcare providers to detect disease and make treatment decisions, scientists to explore the secrets of life, pharmaceutical companies to develop new drugs, and other professionals to apply advanced tools for a diverse range of needs that include human identification, veterinary medicine and food safety. Our mission is to make improvements in life possible by enabling our customers to achieve outstanding success and breakthroughs in Molecular Diagnostics, Applied Testing, Pharma and Academia.

Biological samples contain millions of molecules, but only a small portion of this material is typically of interest for specific medical or other applications. Sample technologies are used to collect biological materials and stabilize, extract and purify the molecule of interest. Assay technologies are then used to amplify and enrich this small amount of isolated material to make it readable and ready for interpretation. Sample & Assay Technologies operate in a highly synchronized manner.

QIAGEN began operations in 1986 by introducing to the emerging biotechnology sector a novel method that standardized and dramatically accelerated the extraction and purification of nucleic acids – biological molecules such as DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) that are essential for life as carriers of genetic information. Since the introduction of that first ready-to-use kit, QIAGEN has expanded to become the global leader with a broad offering of molecular technologies, including related automated systems.

Our products are used in virtually all areas of science focused on advancing knowledge about the molecular basis of life. QIAGEN has become a trusted partner by enabling researchers to obtain exciting insights with products that are considered standards for quality and reliability. More than one billion biological samples are estimated to already have been prepared or analyzed using QIAGEN technologies in laboratories around the world. Net sales of $1.2 billion in 2011 were composed of consumable kits and other revenues (87% of sales) and automated systems and instruments (13% of sales).

QIAGEN has leveraged its leadership position in Sample & Assay Technologies to build a strong position in Molecular Diagnostics. The commercial applications of molecular technologies are transforming healthcare by providing highly specific genetic information to guide prevention and treatment strategies. Molecular Diagnostics accounted for 47% of net sales in 2011. Our products are also increasingly used in Applied Testing, which are areas of molecular testing not related to human healthcare or research that include human identification and forensics, food and water safety, and veterinary testing.

With a focus on innovation, QIAGEN now markets more than 500 core products that are distributed in thousands of variations and combinations. Innovative products are continually being introduced to address new market opportunities or extend the life of existing product lines. We have made a number of strategic acquisitions to enhance our technology and product offerings. We have funded our growth through internally generated funds as well as through debt offerings and private and public sales of equity securities. QIAGEN shares are listed on the NASDAQ exchange under the ticker symbol “QGEN” and on the Frankfurt Prime Standard as “QIA.”

The company is registered under its commercial and legal name QIAGEN N.V. with the trade register (kamer van koophandel) of the Dutch region Limburg Noord under file number 12036979. QIAGEN N.V. is a public limited liability company (naamloze vennootschap) under Dutch law as a holding company. Our principal executive office is located at Spoorstraat 50, 5911 KJ Venlo, The Netherlands, and our telephone number is +31-77-320-8400.

As a holding company, QIAGEN conducts business through subsidiaries located throughout the world, including the Americas, Europe, China, Japan, Australia, India and other major markets. Further information about QIAGEN can be found at www.qiagen.com. By referring to our website, we do not incorporate the website or any portion of the website by reference into this Annual Report.

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Operating Environment in 2011

Economic Environment

In 2011 a weak economic recovery and uncertainties about the near-term outlook created a challenging business environment for QIAGEN and affected demand for our products. The pace of economic growth around the world slowed as 2011 progressed. A series of shocks and policy issues affected the economic environment: natural disasters including Japan’s earthquake, tsunami and nuclear crisis; political turmoil and armed conflicts in North Africa and the Middle East; the sovereign debt crisis in several European countries, particularly Greece; fiscal austerity moves by governments in Europe and the United States; and deceleration in what had been the rapid growth of emerging markets such as China and India.

For 2011, the Gross Domestic Product (GDP) in the 20 largest economies (known as “the G20”) grew an estimated 2.8%, considerably less than the 5% growth in 2010, the first year of recovery after the financial crisis and recession of 2008-09. The fourth quarter of 2011 brought a decline in GDP in Europe, fueling fears of a recession, and slower GDP expansion in the United States and other markets.

Industry Environment

Demand for QIAGEN products is influenced by industry developments in specific customer classes as well as by the broad economy. In 2011, economic weakness in the U.S. and Europe dampened utilization of healthcare services and diagnostic tests – for example, reducing women’s visits to their doctors and use of screening tests for human papillomavirus (HPV) as a strategy for prevention of cervical cancer. Customers in Academia faced limitations on public investments in life science research as the fiscal crisis prompted many governments to curtail spending. In the Pharma industry, many companies continued to reduce spending on R&D and cut staff and projects amid consolidation and pricing pressures.

The long-term growth trend in molecular technologies remains intact. Genomic information is transforming the practice of medicine, and healthcare providers are increasingly relying on molecular diagnostics to detect and profile diseases and then to guide treatments. Researchers in Academia and Pharma are using gene-based approaches to discover causes and mechanisms of diseases and new ways to treat them, as well as to design and monitor clinical trials for new drugs. Public and private users are finding new applications for DNA testing to solve crimes, improve productivity and safeguard food supplies.

Recent Developments

QIAGEN achieved a number of strategic milestones in the development of our business in 2011:

| • |  | In January, QIAGEN began direct sales through a subsidiary in India, a strategic market with 1.2 billion people and rapidly growing healthcare and R&D sectors. The new presence in India is a milestone in QIAGEN‘s strategy to expand our footprint in emerging, high-growth regions.

| • |  | In May, we updated our strategy for ongoing development of the QIAensemble suite of next-generation automation platforms, including the QIAensemble Decapper, the industry‘s first automated device to unseal liquid cytology sample vials, one of the most burdensome steps in laboratory workbox. The Decapper was launched in December 2011. The future QIAensemble suite is planned to incorporate proven core components from the QIAsymphony platform, enhancing compatibility and allowing migration of tests between the two platforms.

| • |  | In July, QIAGEN purchased 62% of the shares of Ipsogen S.A., a publicly listed French company that is a global leader in molecular profiling for leukemia and other blood cancers. We initiated a public tender offer for the remaining shares in October and held an 89% stake by year-end. QIAGEN intends to fully acquire Ipsogen. The relationship provides access to a broad range of assays covering 15 biomarkers used worldwide for the diagnosis, prognosis and monitoring of patients with various blood cancers. Many of these assays have the potential to be used as companion diagnostics to guide treatment decisions. Almost all of Ipsogen‘s assays have been developed for use on QIAGEN‘s Rotor-Gene Q real-time PCR system, which will enable smooth transfer onto the QIAsymphony RGQ platform.

| • |  | In August, we fully acquired Cellestis Ltd., a publicly listed Australian company that has developed and begun to commercialize QuantiFERON, a patent-protected “pre-molecular” technology capable of providing information on diseases far earlier than possible with other diagnostic methods. Cellestis has achieved regulatory approvals and product launches in major markets for QuantiFERON-TB Gold In-Tube, a leading test for latent tuberculosis (TB), a non-symptomatic infection that affects approximately one-third of the world‘s population. We believe QuantiFERON-TB Gold has significant untapped market potential as a preventive screening test to protect vulnerable populations from development of active TB disease.

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MANAGEMENT REPORT Business and Operating Environment

| • |  | In August, QIAGEN began direct sales in Taiwan, a rapidly growing, dynamic market that adds momentum to our expansion in Asia, especially in serving the active academic research and pharmaceutical drug development sectors in Taiwan.

| • |  | Also in August, we entered into a partnership with Pfizer Inc. for development of a companion diagnostic based on QIAGEN’s proprietary KRAS assay technology, which reliably detects mutations of the KRAS gene, for use in guiding treatment with an investigational Pfizer compound in global clinical development for non-small cell lung cancer (NSCLC).

| • |  | In September, QIAGEN entered into a partnership with Eli Lilly and Company for the development, manufacturing and commercialization of a companion diagnostic for an early stage investigational compound known as a Janus kinase 2 (JAK2) inhibitor. Lilly’s proposed drug targets the JAK2 gene, which has been shown to play a role in myeloprolif-erative neoplasms, a variety of blood cancers. We gained exclusive access to the JAK2 biomarker being used in developing the companion diagnostic through our agreement with Ipsogen.

| • |  | In November, QIAGEN began implementing a project to enhance productivity and free up resources for reallocation to strategic initiatives to drive growth and innovation. Initial actions focused on eliminating organizational layers, overlapping structures and duplication between global, regional and local activities. As part of this project, R&D activities will focus more tightly on high-growth areas in all customer classes. QIAGEN also plans to optimize capacity utilization at selected sites and capture savings from shared service functions. As part of this project, QIAGEN reduced its worldwide workforce by approximately 8 –10% at the end of 2011 and in early 2012. Annual pre-tax cost savings of approximately $ 50 million are expected in 2012, with the majority to be reinvested in strategic initiatives.

Our Products

QIAGEN holds leadership positions in a wide range of customer classes for Sample & Assay Technologies. We offer more than 500 core consumable products (known as “kits”) as well as a number of instrument solutions to fully automate the processing of almost all QIAGEN products used for sample preparation and subsequent analysis. The terms “Sample” and “Assay” Technologies define two phases of the process of unlocking valuable molecular information from raw biological materials, predominantly in digital form:

| • |  | Sample Technologies: QIAGEN has developed and advanced a broad range of technologies to extract and purify molecules of interest from biological samples such as blood, bone, tissue, etc. QIAGEN technologies ensure that a biological sample is consistently processed in a highly reproducible, standardized method with the highest level of quality before entering subsequent analysis with assay technologies.

| • |  | Assay Technologies: Building on its leadership in sample technologies, QIAGEN has developed assay technologies that enable the analysis of various kinds of molecules from virtually any biological sample. Assay technologies make information contained in isolated molecules visible and available for interpretation. Assays are tailor-made to address the specific demands of various research areas and commercial applications. Laboratory Developed Test (LDT) assays enable the customer to target molecules of interest for detection using reagents in the kit on platforms such as polymerase chain reaction (PCR). Commercially approved assays are preconfigured by QIAGEN to test for specific targets such as genetic mutations, gene expression levels, influenza, human papillomavirus (HPV), tuberculosis (TB), hepatitis and herpes viruses, or human immunodefi-ciency virus (HIV).

These technologies provide two main categories of revenue streams for QIAGEN:

| • |  | Revenues from consumables and related sales:

Consumable products, typically sample preparation or test kits and related sales, account for approximately 85 – 90% of our net sales. To maximize customer convenience and reduce user error, these kits contain all necessary reagents and buffers, and a manual including protocols and relevant background information. Each kit is sufficient to support a number of applications, varying from one to more than 1,000 tests.

Major applications for QIAGEN consumable products are plasmid DNA purification, RNA purification and stabilization; genomic and viral nucleic acid purification; nucleic acid transfection; polymerase chain reaction (PCR) implication; reverse transcription; DNA cleanup after PCR and sequencing; DNA cloning and protein purification. Our

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validated PCR assays enable detection of viral or bacterial pathogens and parasites in humans and animals, as well as pharmacogenomic testing and genotyping.

Our largest-selling product is the digene HC2 HPV Test, a signal-amplified test regarded as the “gold standard” in testing for high-risk strains of the human papillomavirus (HPV), the primary cause of cervical cancer in women.

Related revenues include royalties, milestone payments from co-development agreements with pharmaceutical companies for companion diagnostics, payments from technology licenses and patent sales. We also have revenue from custom services, such as whole genome amplification services, DNA sequencing, and non-cGMP DNA production on a contract basis.

| • |  | Automation systems and instruments:

Our instrumentation systems automate the use of Sample & Assay Technologies into efficient solutions for a broad range of laboratory needs. These systems, which account for approximately 10% to 15% of net sales, enable customers to perform reliable and reproducible nucleic acid sample preparation, assay setup, target detection and other laboratory tasks.

QIAGEN offers automated systems for all phases of testing, from sample to result. Among them:

| • |  | QIAsymphony is an innovative, easy-to-use modular system offering many features such as continuous loading, random access, and the ability to process an almost unlimited range of sample types. QIAsymphony received the Association for Laboratory Automation’s New Product Award (NPA) following its introduction in 2008. In late 2010, we launched QIAsymphony RGQ, an integrated system that has started a new era of integrated workflow consolidation and laboratory automation, covering all steps from initial sample processing to the final result. QIAsymphony RGQ gives customers access to a broad menu of commercially available assays while also allowing them to run their own PCR-based laboratory-developed tests (LDTs), which account for more than half of the volume of tests performed in many molecular diagnostic laboratories. In 2011, the installed base of QIAsymphony systems increased to more than 550 instruments worldwide.

| • |  | Rotor-Gene Q, the world’s first rotary real-time PCR cycler system, uses real-time PCR reactions to make specific sequences of DNA and RNA visible through amplification and quantifiable through real-time measurement. This system enhances QIAGEN’s options to offer sample and assay technology solutions spanning from sample to result, and is an integral part of the QIAsymphony RGQ system.

| • |  | PyroMark is a high-resolution detection platform based upon Pyrosequencing technology, that allows for the real-time analysis and quantification of genetic mutations and DNA methylation patterns down to the single base pair level. This enables users to identify even previously unknown mutations or variations in targeted DNA regions. This technology also can be employed in multiplex analysis for genetic and pathogen detection. Pyrosequencing plays a pivotal role in epigenetic research and also can be of great value to diagnostic laboratories running personalized healthcare and profiling assays.

| • |  | QIAcube, a sample processing instrument incorporating novel and proprietary technologies, allows users to fully automate the use of almost all of our products originally designed for manual processing of samples. The QIAcube received the NPA honor from the Association for Laboratory Automation in 2007.

| • |  | QIAxcel, designed to take the place of traditional slab-gel analysis, can replace tedious and time-consuming methods of nucleic acid separation in low- to high-throughput laboratories. QIAxcel is characterized by unprecedented sensitivity and time to results for analysis of DNA fragments and RNA.

| • |  | ESEQuant Tube Scanners are portable, battery-operated optical measurement devices based on technology developed by ESE GmbH, a company we acquired in 2010. These UV and fluorescence detection systems enable point of need testing in healthcare and applied testing markets. The ESE technology permits low-throughput molecular testing in physician practices, emergency rooms, remote field areas, and other settings where a laboratory infrastructure is not accessible and fast turnaround is required.

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Customers

From the early days of the biotechnology revolution, we believed that Sample & Assay Technologies for nucleic acids would play an increasingly important role in cutting-edge biology – and that major new commercial uses would develop for information extracted from DNA and RNA. We have been supplying customers since 1986 with innovative proprietary products for the analysis of nucleic acids.

We focus on four customer classes for our products:

| • |  | Molecular Diagnostics – enabling hospitals, physicians and other providers to save lives and fight disease. The commercial use of these technologies in human healthcare has grown to provide approximately half of QIAGEN net sales.

| • |  | Applied Testing – unlocking the potential of molecular information in testing fields not related to human healthcare, such as forensics, food and water testing, veterinary medicine, environmental testing and biosecurity.

| • |  | Pharma – supporting gene-based drug discovery and development by pharmaceutical and biotechnology companies as well as the manufacturing and quality control of biological medicines.

| • |  | Academia – providing tools for life sciences research, including academic institutions and governmental laboratories, such as the National Institutes of Health (NIH) in the U.S. and major research-based universities and institutes around the world.

Molecular Diagnostics

The ability of advanced diagnostic technologies to unlock molecular information from patients is changing the practice of medicine, while creating a significant and growing market for nucleic acid sample preparation and assay technology products. In recent years, the advent of polymerase chain reaction (PCR) and other amplification technologies has made the prospect of nucleic acid-based diagnostics feasible.

This new generation of molecular diagnostics can be used to identify microorganisms, cancer cells, bacteria and viruses by searching for their specific nucleic acid sequences – or to characterize previously unknown DNA sequences related to human diseases. Commercial applications for molecular diagnostics are multiplying as researchers identify new biological markers for disease and develop novel technologies for the detection and analysis of those diagnostic clues from the human body.

The molecular diagnostics market, with sales estimated at approximately $3 billion in 2011 is still a small part of the global in vitro diagnostics market, but it is the fastest growing segment at a projected compound annual growth rate of approximately 10%. Market penetration is still low in the U.S., other developed countries and emerging markets. However, given the advantages of precise genetic information over traditional tests, QIAGEN expects the molecular diagnostics market to provide significant growth opportunities over the long term.

Growth in the Molecular Diagnostics customer class is built upon four strategies for fighting disease, and QIAGEN is targeting each of these fields with a range of dedicated products and tailored marketing:

| • |  | Prevention – using advanced technologies to screen non-symptomatic patients as a preventive strategy, such as testing women for HPV to protect from cervical cancer or screening patients for latent tuberculosis (TB) infection to guard against active TB disease.

| • |  | Profiling – screening symptomatic patients to profile the precise type of disease, for example, testing patients with flu-like symptoms to confirm or rule out dangerous strains such as the influenza type A (H1N1) swine flu.

| • |  | Personalized Healthcare – determining which patients are most likely to respond positively to particular therapies, such as landmark QIAGEN tests for testing the mutation status of genes such as KRAS, EGFR, BRAF and others that influence the effectiveness and safety profile of novel medicines for treatment of various cancers.

| • |  | Point of Need – enabling on-site diagnosis in physician practices, emergency rooms, remote field areas, and other settings where a laboratory infrastructure is not accessible and fast turnaround is required.

We offer one of the broadest portfolios of molecular technologies for human healthcare. Success in Molecular Diagnostics depends on the ability to analyze purified nucleic acid samples from a variety of samples, including blood, tissue, body fluids and stool, and on automated systems that can handle

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hundreds of samples concurrently. Other key factors are the range of assays targeting various diseases and biomarkers, convenience and ease of laboratory workflow, versatility, reliability and standardization of the nucleic acid processing and detection procedures.

One of the largest prevention markets is screening for HPV, a viral infection that is the primary cause of cervical cancer, which kills about 270,000 women a year. We are the global market leader in HPV screening technologies. In the United States, we sell our HPV products primarily for two FDA-approved indications: adjunctive primary screening with a Pap test for women age 30 and older, and follow-up testing of inconsistent Pap test results in women of any age. In Europe and the rest of the world, HPV testing is in varying stages of adoption. We are working closely with public health authorities and researchers on an increasing number of clinical trials and policy initiatives aimed at expanding the use of HPV testing for prevention or follow-up to treatment of cervical cancer.

Following QIAGEN’s 2011 acquisition of Cellestis Ltd., with its early-warning QuantiFERON-TB Gold product to detect latent TB infection, we expect to drive the growth of this highly accurate screening test as a strategy for the prevention of active TB disease in vulnerable populations.

Approximately one-third of the world’s population is infected with the tuberculosis bacterium but suffers no symptoms, a condition known as latent TB. However, about 5% to 10% of those patients at some point will develop active tuberculosis, a potentially life-threatening contagious disease that typically spreads from one active patient to 10 to 20 other people. Sales of QuantiFERON-TB Gold were approximately $55 million in 2011, and the potential global market for latent TB detection is estimated at up to $1 billion.

In Profiling, we offer an extensive range of Sample & Assay Technologies for use in the diagnosis of patients for various diseases, including HIV, hepatitis, influenza and blood cancers. We are expanding this portfolio of assays, and intend to gain regulatory approvals for these products in various geographic regions in the coming years, particularly the U.S. A key element of this global expansion will be the use of these assay technologies on QIAsymphony RGQ.

In Personalized Healthcare, we enter into collaborative arrangements with pharmaceutical and biotech companies for the co-development of companion diagnostics for personalized healthcare. We have research projects with high-profile companies such as Amgen, Boehringer Ingelheim, Bristol-Myers Squibb/ImClone, Eli Lilly, and Pfizer. Acquisitions of biomarkers and other technologies contribute to our expanding co-development relationships. For example, shortly after our acquisition of a majority interest in Ipsogen in 2011, we entered an agreement with Eli Lilly to co-develop a companion diagnostic for a Lilly compound for certain blood cancers targeting the Janus kinase 2 (JAK2) gene, based on our exclusive access to the JAK2 biomarker through Ipsogen. The first companion diagnostics are already being marketed in Europe and other markets, and we made regulatory submissions in 2011 for two companion diagnostics to be used with colorectal cancer drugs in the U.S. A key element of the global expansion in this area is the ability of labs to efficiently use these assay technologies on QIAsymphony RGQ.

We market a range of automation systems designed for low-, medium-, and high-throughput nucleic acid sample preparation and handling tasks in laboratories performing molecular diagnostics. The flagship platform is QIAsymphony, based on its unique characteristics. Nucleic acid samples purified on our instruments are ready for use in the demanding and sensitive downstream assays performed in molecular diagnostic applications. We offer closed and open assay technologies. Open assay technologies contain PCR reagents to identify molecules of choice. Closed assays, diagnostics with predefined targets, include multiplexing and other pathogen or genetic mutation detection assays such as tests for HIV, tuberculosis, influenza or hepatitis. We market assays directly to end customers via our sales channels, and selected assays through major diagnostic partners with complementary customer groups. In addition, we intend to enter into partnerships or other agreements with companies to broaden the distribution of our products.

Applied Testing

Demand is growing in Applied Testing – our term for the use of molecular technologies outside of human healthcare and research applications. Industry and government organizations use standardized sample preparation and assay solutions for human identification and forensics, food and water safety, and veterinary testing. The value of genetic “finger-printing” has been shown in criminal investigations involving DNA analysis, public policy compliance for food safety and genetically modified organisms (GMOs), and containment of diseases in commercial livestock. Molecular testing can be

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performed by well-trained researchers in fully equipped laboratories, and increasingly also by less-trained personnel provided with easy-to-use, reproducible and standardized methods for point of need testing. Our manual DNA and RNA purification methods and the automated solutions on QIAsymphony, QIAcube, EZ1 Advanced, BioRobot EZ1 and other products, as well as our amplification enzymes and quantitative assays, address the needs in these markets.

Pharma

QIAGEN is a significant supplier for pharmaceutical and bio-technology companies. Drug discovery and development efforts increasingly employ genomic information, both to guide research in diseases and to differentiate the patient populations most likely to respond to particular therapies. Approximately half of QIAGEN sales in this customer class support research, while the remaining half of sales support clinical development processes, including the stratification of patient populations based on genetic information. QIAGEN’s GeneGlobe online portal offers scientists an industry-leading source of information with searchable data on 60,000 genomic technologies for disease pathways, including annotations and references, to guide research and to enable ordering from this very broad portfolio of assays.

As new drugs are commercialized, testing technologies developed in parallel with those therapies can move from Pharma R&D into the molecular diagnostics market as companion diagnostics, which would be marketed within the Molecular Diagnostics customer class. Healthcare professionals can then customize treatment by testing for specific genetic bio-markers that help to determine the safety and efficacy profiles of drugs in individual patients, achieving the best possible therapeutic results and avoiding unnecessary treatments. In the coming years, we expect a wave of newly discovered biomarkers and companion diagnostics to transform the treatment of an increasing number of diseases.

In addition to the broad portfolio of molecular technologies, QIAGEN brings to the Pharma market a full infrastructure for co-development programs, intellectual property on platforms and content, extensive regulatory experience, global reach in our sales channels, and independence as a company focusing exclusively on these types of technologies.

Academia

QIAGEN provides Sample & Assay Technologies to leading research institutions around the world. Many academic laboratories continue to utilize manual, labor intensive methods for nucleic acid separation and purification. Recognizing the opportunity to replace traditional methods with reliable, fast, highly reproducible, and high-quality nucleic acid extraction and purification technologies, QIAGEN has concentrated product development and marketing efforts on the research markets in industry and Academia.

The academic market also supports our presence in the Molecular Diagnostics and Pharma customer classes. Research in university settings often helps in the development of specific technologies for targeted biomolecules, and academic research can also result in scientific publications that validate the usefulness of QIAGEN technologies for specific applications.

Geographic Markets

QIAGEN currently markets products in more than 100 countries. The following table shows total revenue by geographic market for the past three years (net sales are attributed to countries based on the location of the subsidiary making the sale, as certain subsidiaries have international distribution):

$1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Americas: |  |  |  |  |  |  |  |  |  |  |  |
United States |  |  | 466,502 |  |  |  | 472,682 |  |  |  | 446,151 |
Other Americas |  |  | 55,137 |  |  |  | 50,912 |  |  |  | 47,995 |
Total Americas |  |  | 521,639 |  |  |  | 523,594 |  |  |  | 494,146 |
Europe |  |  | 444,441 |  |  |  | 398,029 |  |  |  | 363,949 |
Asia Pacific & Rest of World |  |  | 203,667 |  |  |  | 165,808 |  |  |  | 151,730 |
Total |  |  | 1,169,747 |  |  |  | 1,087,431 |  |  |  | 1,009,825 |

Expansion into high-potential geographic markets is a core priority. The top seven emerging markets (Brazil, Russia, India, China, South Korea, Mexico and Turkey) represented 12% of net sales in 2011. We have built a presence in China with approximately 350 employees, making it our third-largest geographic market in terms of sales. In 2011, new subsidiaries were created in India and Taiwan, further expanding our presence in Asia.

Research and Development

QIAGEN invests more in research and development, which totaled $130.6 million in 2011, or 11% of sales, than most companies in our industry. We are committed to expanding

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QIAGEN’s global leadership in Sample & Assay Technologies as rapid advances in molecular biology open up new and useful applications.

Our strategy for managing innovation focuses on addressing the most significant unmet medical and scientific needs. We target our resources to develop the most promising technologies for use by our customers in Molecular Diagnostics, Applied Testing, Pharma and Academia – and to meet the needs of healthcare professionals and scientists in key geographic markets.

Innovation at QIAGEN follows parallel paths:

| • |  | Creating new systems for automation of workflows – platforms for laboratories, hospitals and other users of these novel molecular technologies.

| • |  | Expanding our broad portfolio of “content” – in particular, novel assays to detect and characterize molecular structures and biomarkers for disease or genetic identification.

More than 700 employees in research and development work in eight centers of excellence on four continents. Our comprehensive intellectual property portfolio spans more than 1,000 granted patents and more than 1,000 pending applications.

Innovations in instrumentation are strengthening our leadership in the automation of these technologies, driving dissemination of molecular technologies in healthcare and other fields, and generating increased demand for QIAGEN consumable products. We continue to extend our modular, medium-throughput QIAsymphony platform, enabling hospitals and other customers to adopt or greatly expand their use of molecular diagnostics. QIAsymphony RGQ, designed to allow fully integrated processing from initial sample to final result, has expanded the QIAsymphony installed base since the launch of the fully integrated system in late 2010. We plan to integrate modules in the future for specialized needs such as pyrosequencing. In 2011, we updated development plans for the QIAensemble system, a high-throughput platform based on the same core technologies of QIAsymphony, including plans to enable migration of QIAGEN assays between the two platforms.

QIAGEN is commercializing a deep pipeline of content: molecular assays for preventive screening and diagnostic profiling of diseases, tests for important biomarkers to guide personalized cancer therapies, and assays for a broad range of other targets. The rollout of QIAsymphony RGQ is accompanied by an extensive development program involving assays for Molecular Diagnostics and other customer classes. Regulatory submissions planned for 2012 include companion diagnostics for cancer drugs targeting EGFR (epidermal growth factor receptor) in the U.S. and the BRAF gene in the European Union and molecular and pre-molecular assays for the infectious disease CMV (cytomegalovirus). In Applied Testing, QIAGEN continues to develop new content for human identification, food safety and veterinary diagnostics. We are also expanding our extensive portfolio of products for disease pathway research by Pharma and Academic customers. In addition, we are developing assays for specific applications in key markets such as China and Japan. The combined markets for QIAGEN’s current assay development portfolio total more than $1 billion in potential annual sales.

In addition, QIAGEN has invested in co-development of companion diagnostics for personalized healthcare through projects with pharmaceutical and biotech companies. We have created a center of excellence in companion diagnostics in Manchester, U.K. These programs typically begin with development of targeted assays to assist our customers in the clinical development of new drugs by identifying patient populations most likely to respond favorably to specific therapies. The collaborations have potential to develop into companion diagnostics marketed commercially along with the new drugs.

Sales and Marketing

We market our products in more than 100 countries throughout the world. We have established subsidiaries in markets we believe have the greatest sales potential in the Americas, Europe, Australia and Asia. We have established a network of experienced marketing personnel and employ a field sales force of more than 1,500 people, who sell QIAGEN products and provide direct support to customers. A significant number of marketing and sales staff members are experienced scientists with academic degrees in molecular biology or related areas. In addition, business managers oversee relationships with key accounts to ensure that QIAGEN is serving their needs on the commercial side, such as procurement systems, financing arrangements, data on the costs and value of our systems, and collaborations among organizations. We also have specialized independent distributors and importers in many markets.

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Our marketing strategy focuses on providing high-quality products that offer customers unique value, coupled with commitment to technical excellence and customer service. We have developed a range of marketing tools to provide customers with direct access to technical support and to inform them of new product offerings, as well as to enhance QIAGEN’s reputation for technical excellence, high-quality products and commitment to customer service. One such tool is our technical service hotline, which allows existing or potential customers to discuss a wide range of technical questions regarding our products and related molecular biology procedures, via phone or e-mail, with Ph.D. and M.Sc. scientists in our technical service group. Frequent communication with customers enables us to identify market needs, gain early insight into new developments and business opportunities, and address them with new products.

QIAGEN’s GeneGlobe online portal has become a valuable outreach to life science researchers in Pharma and Academia by providing an industry-leading resource on disease pathways, biomarkers and genomic information. GeneGlobe provides searchable, annotated data on 60,000 pathway and gene-related technologies, with links to order products related to each avenue of investigation.

We also distribute several publications, including our catalog, to existing and potential customers worldwide, providing new product information, product updates, and articles by customers and by our scientists about existing and new applications. Our website (www.qiagen.com) contains a full online product catalog and ordering system, as well as a host of support tools, scientific design tools and other resources. We have full Japanese and Chinese language versions of our website, and some information is available on our site in French, German and Korean to support these markets. Information contained on our website, or accessed through it, is not part of this Annual Report. In addition, QIAGEN holds numerous scientific seminars to present technical information at leading clinical, academic and industrial research institutes worldwide. We conduct direct marketing campaigns to announce new products or offer special promotions, and we offer personalized electronic newsletters with useful information for molecular biology applications.

In addition to keeping customers informed of new product offerings, we offer an inventory consignment program. The QIAcabinet is a storage cabinet owned by the company and placed in customer laboratories at their request. Stocked with QIAGEN products, the QIAcabinet offers customers the convenience of immediate access, reducing reorder procedures and shipping costs. We monitor cabinet inventory and bill the customers at regular intervals as products are used. QIAcabinet increases our visibility in the laboratory and helps maintain our competitive position, while reducing distribution costs.

Seasonality

Our business does not experience significant, predictable seasonality. Historically, a significant portion of our sales have been to researchers, universities, government laboratories and private foundations whose funding is dependent upon grants from government agencies, such as the National Institutes of Health and similar bodies. To the extent that our customers experience increases, decreases or delays in funding arrangements and budget approvals, and to the extent that any of our customers’ activities are slowed, such as during times of higher unemployment, vacation periods or delays in the approval of government budgets, including the U.S. federal government’s budget, we may experience fluctuations in sales volumes during the year or delays from one period to the next in the recognition of sales.

Intellectual Property, Proprietary Rights and Licenses

We have made and expect to continue to make investments in intellectual property. In 2011, our purchases of intangible assets totaled $34.6 million. While we do not depend solely on any individual patent or technology, we are significantly dependent in the aggregate on technology that we own or license. Therefore, we consider protection of proprietary technologies and products one of the major keys to our business success. We rely on a combination of patents, licenses and trademarks to establish and protect proprietary rights. As of December 31, 2011, we owned 186 issued patents in the United States, 136 issued patents in Germany and 740 issued patents in other major industrialized countries. We have over 1,000 pending patent applications. Our policy is to file patent applications in Western Europe, the United States and Japan. U.S. patents have a term of 17 years from the date of issue (for patents issued from applications submitted prior to June 8, 1995), or 20 years from the date of filing (in the case of patents issued from applications submitted on or after June 8, 1995). Patents in most other countries have a term of 20 years from the date of filing the patent application. We intend to aggressively prosecute and enforce patents and to otherwise protect our proprietary technologies. We also rely on trade secrets, know-how, continuing technological innovation and licensing opportunities to develop and maintain our competitive position.

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Our practice is to require employees, consultants, outside scientific collaborators, sponsored researchers and other advisers to execute confidentiality agreements upon commencement of their relationships with us. These agreements provide that all confidential information developed by or made known to the individual during the course of the relationship is to be kept confidential and not disclosed to third parties, subject to a right to publish certain information in scientific literature in certain circumstances and to other specific exceptions. In the case of our employees, the agreements provide that all inventions conceived by individuals in the course of their employment will be our exclusive property.

Competition

We believe our primary competition in sample technology products involves traditional separation and purification methods, such as phenol extraction, cesium chloride density gradient centrifugation, and precipitation. These methods utilize widely available reagents and other chemicals supplied by companies such as Sigma-Aldrich Corp. and Roche Diagnostics GmbH (Applied Sciences Division). We compete with these methods through our innovative technologies and products, which offer a comprehensive solution for nucleic acid collection, pre-treatment, separation and purification needs and provide significant advantages in speed, reliability, convenience, reproducibility and ease of use.

We also experience competition in various markets from other companies providing sample preparation products in kit form and assay solutions. These competitors include, but are not limited to, Promega Corp., Millipore Corp., and Macherey-Nagel GmbH for nucleic acid separation and purification; Life Technologies Corp. and Promega Corp. for assay solutions and for transfection reagents; and Sigma-Aldrich Corp. and Fisher Scientific for protein fractionation products. We believe our proprietary technologies and products offer significant advantages over competitors’ products with regard to purity, speed, reliability and ease-of-use.

In our HPV franchise, we face competition from well-established diagnostic technologies, such as cytology, and from emerging HPV testing approaches, such as signal amplified testing, research-based PCR, other indicators of disease and other traditional testing methods developed by laboratories.

Our competitors include companies such as Roche Diagnostics GmbH and Gen-Probe, Inc., whose HPV tests were approved in the U.S. during the second half of 2011, as well as Hologic, Inc., which has been marketing FDA-approved HPV testing products in the U.S. in recent years. We expect competition to intensify, but QIAGEN’s leading position in the HPV market is supported by our marketing efforts and the data supporting our “gold standard” digene HPV Test. We believe we have a competitive advantage driven by the fact that more than 80 million of these tests have been distributed worldwide as well as a multitude of clinical trials encompassing more than one million women. These clinical trial results, many of which have been published in peer-reviewed journals such as the New England Journal of Medicine, have validated that our HPV test products, used alone or in conjunction with the Pap test, demonstrate high clinical sensitivity and high negative predictive value for diagnosis of cervical disease and cancer. In addition to the industry-leading clinical performance of our assay, considering the high-volume needs of the HPV testing market, QIAGEN has another competitive benefit in terms of its offering for HPV testing automation systems, including performance and reliability, ease of use, standardization, cost, proprietary position and regulatory approvals. In 2011, multiyear contracts were concluded with a number of major U.S. customers for HPV screening products. Also in late 2011, QIAGEN launched the QIAensemble Decapper in the U.S., which automates several manual processing steps.

The medical diagnostics and biotechnology industries are subject to intense competition. Some of our other products, such as tests for Chlamydia, Gonorrhea, hepatitis B virus, herpes simplex virus and cytomegalovirus, compete against existing screening, monitoring and diagnostic technologies, including tissue culture and antigen-based diagnostic methodologies. Our competitors for gene-based diagnostic probes include Roche Diagnostics, Abbott, Siemens and Gen-Probe. We believe the primary competitive factors in the market for gene-based probe diagnostics and other screening devices are clinical validation, performance and reliability, ease of use, standardization, cost, proprietary position, competitors’ market shares, access to distribution channels, regulatory approvals and availability of reimbursement.

We do not believe our competitors have the same comprehensive approach to Sample & Assay Technologies as QIAGEN or the ability to provide the broad range of technologies and depth of products and services that we offer. With

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our complete range of manual and fully automated solutions, we believe we offer the value of standardization of procedures and, therefore, more reliable results. We also believe our integrated strategic approach gives us a competitive advantage. The quality of sample preparation – a field in which we have a unique market and leadership position – is a key prerequisite for reliable molecular assay solutions, which are increasingly being applied in emerging markets such as Molecular Diagnostics and Applied Testing.

Current and potential competitors may be in the process of seeking FDA or foreign regulatory approvals for their respective products. QIAGEN’s continued future success will depend in large part on our ability to maintain our technological advantage over competing products, expand our market presence and preserve customer loyalty. There can be no assurance that we will be able to compete effectively in the future or that development by others will not render our technologies or products non-competitive.

Suppliers

As part of our quality assessment procedures, we periodically evaluate the performance of our raw material suppliers, potential new alternative sources of such materials, and the risks and benefits of reliance on our existing suppliers. We buy materials for our products from many suppliers, and are not dependent on any one supplier or group of suppliers for our business as a whole. Raw materials generally include chemicals, raw separation media, biologics, plastics and packaging. Raw materials are generally readily available at competitive, stable prices from a number of suppliers. Certain raw materials are produced under our specifications, so we closely monitor stock levels to maintain adequate supplies. We believe we maintain inventories of raw materials at a sufficient level to ensure reasonable customer service levels and to guard against normal volatility in availability.

Government Regulations

We are not subject to direct regulation other than regulation generally applicable to businesses pursuant to various laws and regulations in effect in the different jurisdictions in which we operate, including laws and regulations applicable to environmental matters, such as the handling and disposal of hazardous wastes. Our research and development activities involve the controlled use of small amounts of hazardous materials, chemicals and radioactive compounds. Although we believe that our safety procedures for handling and disposing of such materials comply with the standards prescribed by applicable regulations, such as the United States Occupational Safety and Health Administration’s, or OSHA, Hazard Communication and Occupational Exposure to Hazardous Chemicals in Laboratories standards, the risk of accidental contamination or injury from these materials cannot be completely eliminated. In the event of such an accident, we could be held liable for any damages that result, and any such liability could have a material adverse effect on us.

We also comply with the OSHA Bloodborne Pathogens standard and the Center for Disease Control/National Institutes of Health Biosafety in Microbiological and Biomedical Laboratories standards for the handling of biological materials and comply with the United States Department of Transportation and International Air Transport Association regulations for the shipping of our kits which contain materials classified as hazardous. There are other federal, state and local laws and regulations applicable to our business, including those of the United States Environmental Protection Agency and the Maryland Department of the Environment. However, we do not expect that compliance with governmental regulations to which we are subject will have a material effect on our capital expenditures, earnings or competitive positions.

International sales of in vitro diagnostic (IVD) and other medical devices are subject to the regulatory requirements of each country or defined economic region, such as the European Union. The regulatory review process varies from country to country and many countries also impose product standards, packaging requirements, labeling requirements and import restrictions on devices.

In the United States, IVDs are regulated by the FDA as medical devices. Medical devices are classified into one of three classes on the basis of the controls deemed by the FDA to be necessary to reasonably ensure their safety and effectiveness. Class I devices are subject to general controls, including labeling, premarket notification and adherence to FDA’s quality system regulations, which are device-specific good manufacturing practices. Class II devices are subject to general controls and special controls, including performance standards and postmarket surveillance. Class III devices are subject to most of the previously identified requirements as well as to premarket approval. Class I devices are exempt from premarket submissions to the FDA; most Class II devices require the submission of a 510(k) premarket notification to the FDA; and Class III devices require submission of a

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premarket approval application, or PMA. Most in vitro diagnostic kits are regulated as Class I or Class II devices and are either exempt from premarket notification or require a 510(k) submission.

A 510(k) notification must demonstrate that a medical device is substantially equivalent to another legally marketed device, termed a “predicate device,” that is legally marketed in the United States and for which a PMA was not required. A device is substantially equivalent to a predicate device if it has the same intended use and technological characteristics as the predicate, or has the same intended use but different technological characteristics, where the information submitted to the FDA does not raise new questions of safety and effectiveness and demonstrates that the device is at least as safe and effective as the legally marketed device. Most 510(k)do not require clinical data for clearance, but a minority will. The FDA is supposed to issue a decision letter within 90 days of receipt of the 510(k) if it has no additional questions or send a first action letter requesting additional information within 75 days. Requests for additional data, including clinical data, will increase the time necessary to review the notice. If the FDA does not agree that the new device is substantially equivalent to the predicate device, the new medical device is automatically classified as a Class III device for which a PMA will be required. However, the sponsor may petition the FDA to make a risk-based determination that the device does not pose the type of risk associated with Class III devices and down-classify the device to Class I or Class II.

Class III devices, such as our HC2 HPV test, require the submission and approval of a PMA prior to product sale. The PMA process is more complex, costly and time consuming than the 510(k) process. A PMA must be supported by more detailed and comprehensive scientific evidence, including clinical data, to demonstrate the safety and efficacy of the medical device for its intended purpose. If the device is determined to present a “significant risk,” the sponsor may not begin a clinical trial until it submits an investigational device exemption, or IDE, to the FDA and obtains approval from the FDA to begin the trial. After the PMA is submitted, the FDA has 45 days to make a threshold determination that the PMA is sufficiently complete to permit a substantive review. If the PMA is complete, the FDA will file the PMA. The FDA is subject to a performance goal review time for a PMA of 180 days from the date of filing, although in practice this review time is longer. Questions from the FDA, requests for additional data and referrals to advisory committees may delay the process considerably. The total process may take several years, and the FDA may also request additional clinical data as a condition of approval or after the PMA is approved. Product changes after approval typically require a supplemental submission with FDA review cycles ranging from 30 to 180 days.

Any products manufactured or distributed pursuant to FDA clearances or approvals are subject to pervasive and continuing regulation by the FDA, including recordkeeping requirements, reporting of adverse experiences with the use of the device, and restrictions on advertising and promotion. Device manufacturers are required to register their establishments and list their devices with the FDA and are subject to periodic inspections by the FDA and certain state agencies. Noncompliance with applicable FDA requirements can result in, among other things, warning letters, fines, injunctions, civil penalties, recalls or seizures of products, total or partial suspension of production, refusal of the FDA to grant 510(k) or PMA approval for devices, withdrawal of 510(k) clearances and/or PMA approvals, or criminal prosecution.

Some of our test kits are sold for research use only in the United States. We do not promote these tests for clinical diagnostic use, and they are labeled “For Research Use Only” or RUO, as permitted by FDA regulations.

Receipt and maintenance of regulatory authorization to market and sell our products is vital to future success. In addition to seeking regulatory authorizations for our products, we work with other companies to seek regulatory clearance or approval for use of their products to provide the specimens necessary to perform our diagnostic tests. The time, money and resources required for new product clearances or approvals by the FDA and foreign authorities is unpredictable, and the necessary approvals or clearances may not be granted on a timely basis or at all. Delays or failure to receive such approvals or clearances could have a material adverse effect on our business, financial condition and results of operations.

Organizational Structure

QIAGEN N.V. is the holding company for more than 50 consolidated subsidiaries, the majority of which have the primary function of the distribution of our products and services on a regional basis. Certain subsidiaries also have research and development or production activities. A listing of our significant subsidiaries and their jurisdictions of incorporation is included on page 182 of this Annual Report.

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MANAGEMENT REPORT Business and Operating Environment

Property

QIAGEN’s production and manufacturing facilities for consumable products are located in Germany, the United States, China, France, and the United Kingdom. Our instrument production facilities are located in Switzerland. In recent years, we have made investments in automated and interchangeable production equipment to increase our production capacity and improve efficiency. Our production and manufacturing operations are highly integrated and benefit from sophisticated inventory control. Production management personnel are highly qualified, and many have advanced degrees in engineering, business and science. We also have installed and continue to expand production-planning systems that are included in our integrated information and control system based on the SAP R/3 business software package from SAP AG. Worldwide, we use SAP software to integrate most of our operating subsidiaries. Capital expenditures for property, plant and equipment totaled $86.8 million, $79.7 million and $52.2 million for 2011, 2010 and 2009, respectively.

QIAGEN has an established quality system, including standard manufacturing and documentation procedures, intended to ensure that products are produced and tested in accordance with the FDA’s Quality System Regulations, which impose current Good Manufacturing Practice (cGMP) requirements. For cGMP production, special areas were built in our facilities in Hilden, Germany, and Germantown and Gaithersburg, Maryland. These facilities operate in accordance with cGMP requirements.

The consumable products manufactured at QIAGEN GmbH in Germany, and QIAGEN Sciences, Inc. and QIAGEN Gaithersburg, Inc., both in Maryland, are produced under ISO 9001: 2000, ISO 13485:2003 for Medical Devices, and ISO 13485:2003 CMDCAS, and the EC Directive 98/79/EC for medical devices. QIAGEN Instruments AG in Switzerland, which produces the majority of our instrumentation product line, is also ISO 9001: 2000 and 13485:2003 certified. Our certifications form part of our ongoing commitment to provide our customers high-quality, state-of-the-art Sample & Assay Technologies and to the development of our Total Quality Management system.

Our facilities in Hilden, Germany, currently occupy a total of approximately 755,000 square feet, some of which is leased pursuant to separate contracts, the last of which expires in 2018. Our production capacity is increased through our manufacturing and research facilities in the United States. QIAGEN Sciences, Inc. owns a 27-acre site in Germantown, Maryland. The 200,000 square foot Germantown facility consists of several buildings in a campus-like arrangement and is intended to accommodate over 250 employees. There is room for future expansion of up to 200,000 square feet of facility space. We lease a facility in Gaithersburg, Maryland, comprising a total of 150,000 square feet for manufacturing, warehousing, distribution and research operations.

In 2009, we purchased additional land adjacent to our facility in Hilden, Germany, for € 2.5 million (approximately $3.2 million) and began construction to further expand our facilities for research and development and production. In 2010, we began construction on expansion of our research, production and administrative space in Germantown, Maryland. While the construction in Germany is complete, the U.S. expansion projects are expected to continue into 2014, with both projects estimated at a total cost of approximately $94.0 million, of which $54.1 million had been incurred as of December 31, 2011. We anticipate being able to fund these expansions with cash generated by operating activities.

Other subsidiaries throughout the world lease smaller amounts of space. Our corporate headquarters are located in leased office space in Venlo, The Netherlands.

We believe our existing and planned production and distribution facilities can support anticipated production needs for the next 36 months. Our production and manufacturing operations are subject to various federal, state, and local laws and regulations including environmental regulations. We do not believe we have any material issues relating to these laws and regulations.

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Opportunities and Risks

QIAGEN, like any other company, has business operations that involve significant opportunities and risks. Effective management is paramount to safeguarding the sustainable value creation, and the central task of the leadership team. Managing opportunities and risks is an integral part of the corporate governance system in place throughout QIAGEN, not the task of one particular organizational unit. According to our current assessment, we consider the opportunities and risks to be manageable and the survival of QIAGEN not to be endangered at the time of this report; QIAGEN is well prepared to meet future challenges.

Opportunities

As an international company, QIAGEN is exposed to a wide variety of developments in the various markets in which it operates. Our mission is to “make improvements in life possible” by capturing growth opportunities presented by the dissemination of molecular technologies across the four customer classes in Molecular Diagnostics, Applied Testing, Pharma and Academia. Due to increased life expectancy for people living in developed countries, and also the dynamic growth of healthcare demand in many emerging markets, the need for innovative diagnostics is increasing at a marked pace. This is underscored by the proven benefits of diagnostics to improve healthcare outcomes, particularly the advent of companion diagnostics to personalize healthcare, while still representing a small fraction of overall healthcare expenditures. Our internal R&D activities present major opportunities, and we are working to find new products and improve existing ones across our portfolio of Sample & Assay Technologies. We also continuously evaluate potential additional opportunities across our four customer classes as an integral part of our strategy. All of these factors represent future growth opportunities for QIAGEN.

Risks

This section outlines a number of significant risks to which QIAGEN is exposed. The order in which the risks are listed is not intended to imply any assessment as to the likelihood of their materialization or the extent of any resulting damages. They should also be seen in light of the opportunities that could result from positive trends. For further information, refer to the risks and uncertainties discussed under the caption “Risk Factors” in Item 3 of the 2011 Annual Report on Form 20-F on file with the U.S. Securities and Exchange Commission and throughout this Annual Report.

An inability to manage our growth, manage business expansion, or successfully integrate acquired businesses could adversely affect our business.

Our business has grown rapidly, with total net sales increasing to nearly $1.2 billion in 2011 from $893.0 million in 2008. We have made several acquisitions in recent years, including Cellestis Ltd. in August 2011 and purchased a majority of Ipsogen S.A. shares in July 2011. Other acquisitions include SABiosciences and DxS Ltd. in 2009; Corbett Life Science Pty. Ltd., or Corbett, in 2008; and Digene Corporation, or Digene, in 2007. We intend to identify and acquire other businesses in the future that support our strategy to build on our global leadership position in Sample & Assay Technologies. The successful integration of acquired businesses requires a significant effort and expense across all operational areas.

We have also made significant investments to expand our business operations. In January 2009, we purchased land adjacent to our facility in Germany and in August 2009 began a major expansion project to create additional facilities for research and development as well as to expand production capacity. This expansion project was substantially completed by the end of 2011. In addition, we began a project in June 2010 to expand our facility in Germantown, Maryland, for research, production and administrative space, and this project is expected to continue into 2014. These expansion projects increase our fixed costs, resulting in higher operational costs in the future that will negatively impact our gross profit and operating income until we fully utilize the additional capacity of these planned facilities. We also continue to upgrade our operating and financial systems and expand the geographic presence of our operations, which has resulted in the hiring of new employees as well as increased responsibilities for both existing and new management personnel. The rapid expansion of our business and the addition of new personnel may place a strain on our management and operational systems.

Our future operating results will depend on the ability of our management to continue to implement and improve our research, product development, manufacturing, sales and marketing and customer support programs, enhance our operational and financial control systems, expand, train and manage our employee base, integrate acquired businesses, and effectively address new issues related to our growth as they arise.

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MANAGEMENT REPORT Opportunities and Risks

Acquisitions expose us to new risks, and we may not achieve the anticipated benefits of acquisitions of technologies and businesses.

During the past several years, we have acquired and integrated a number of companies through which we have gained access to new technologies, products and businesses that complement our internally developed product lines. In the future, we expect to acquire additional technologies, products or businesses to expand our operations. Acquisitions expose us to new operating and other risks.

Our continued growth is dependent on the development and success of new products.

Rapid technological change and frequent new product introductions are typical in the markets we serve. Our future success will depend in part on continuous, timely development and introduction of new products that address evolving market requirements. We believe successful new product introductions provide a significant competitive advantage because customers make an investment of time in selecting and learning to use a new product and are reluctant to switch thereafter. To the extent that we fail to introduce new and innovative products, or such products suffer significant delays in development or are not accepted in the market, we may lose market share to our competitors, which will be difficult or impossible to regain. An inability to successfully develop and introduce new products, for technological or other reasons, could reduce our growth rate or otherwise have an adverse effect on our business.

Global economic conditions could adversely affect our business, results of operations and financial conditions.

Our results of operations could be materially affected by adverse general conditions in the global economy and global financial markets. In times of economic hardship or high unemployment, patients may decide to forego or delay routine tests, in particular for our HPV test used to screen women for risk of cervical cancer. Changes in the availability or reimbursement of our molecular diagnostic testing products by insurance providers and healthcare maintenance organizations could also have a significant adverse impact on our results of operations. Access to financing in the global financial markets has also been adversely affected for many businesses during the recent challenging economic times and public debt crisis. The uncertainty surrounding the resolution of the economic and sovereign debt crisis in Europe continues to have a negative impact on financial markets and economic conditions more generally. Our customers may face internal financing pressures that adversely impact spending decisions, the ability to purchase our products or that lead to a delay in collection of receivables and thus negatively impact our cashflow. A severe or prolonged economic downturn could result in a variety of risks to our business that would adversely impact our results of operations, including the reduction or delay in planned improvements to healthcare systems in various countries, the reduction of funding for life sciences research, and intensified efforts by governments and healthcare payors regarding cost-containment efforts.

Our concentration of a significant portion of revenues in products related to HPV testing increases our dependence on that product group’s success.

Contributions in 2011 from global sales of our HPV test products represent approximately 20% of our total net sales, of which approximately 15% were in the United States. While the ultimate decision to order this test is made by physicians in consultation with their patients, in the U.S. the test analysis is generally performed by reference laboratories, who in turn are the customers of QIAGEN in terms of ordering tests and related equipment. At present, a limited number of reference laboratories in the U.S. account for the majority of HPV test sales. In times of economic hardship or high unemployment patients may decide to forego or delay routine tests, as was the case during the second half of 2010 and during much of 2011 in the U.S. Further, the cost of HPV testing in the U.S. is reimbursed to reference laboratories by insurance providers and health maintenance organizations. If these insurance plans decide to limit the availability of payments for our test to their members, it could have a significant adverse impact on our results of operations. Growth in other areas through diversification and new product launches has reduced the proportion of total net sales coming from HPV tests in the U.S., but if we fail to further diversify, we could be at risk that under-performance of the HPV line or loss of a customer could materially affect results of operations.

We may encounter delays in receipt, or limits in the amount, of reimbursement approvals and public health funding, which will impact our ability to grow revenues in the healthcare market.

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Third-party payors are often reluctant to reimburse healthcare providers for the use of medical tests that involve new technologies or provide novel diagnostic information. In addition, third-party payors are increasingly limiting reimbursement coverage for medical diagnostic products and, in many instances, are exerting pressure on diagnostic product suppliers to reduce their prices. Since each third-party payor often makes reimbursement decisions on an individual patient basis, obtaining such approvals is a time-consuming and costly process that requires us to provide scientific and clinical data supporting the clinical benefits of each of our products. As a result, there can be no assurance that reimbursement approvals will be obtained. This process can delay the broad market introduction of new products, and could have a negative effect on our results of operations. As a result, third-party reimbursement may not be consistent or financially adequate to cover the cost of our products. This could limit our ability to sell our products or cause us to reduce prices, which would adversely affect our results of operations.

Reduction in research and development budgets and government funding may result in reduced sales.

Our customers include researchers at pharmaceutical and biotechnology companies, academic institutions, and government and private laboratories. Fluctuations in the research and development budgets of these organizations could have a significant adverse effect on demand for our products. Research and development budgets are affected by changes in available resources, the mergers of pharmaceutical and biotechnology companies, changes in spending priorities and institutional budgetary policies. Our results of operations could be adversely affected by any significant decrease in expenditures for life sciences research and development by pharmaceutical and biotechnology companies, academic institutions, and government and private laboratories. In addition, short-term changes in administrative, regulatory or purchasing-related procedures can create uncertainties or other impediments that can have an adverse impact on our results of operations. In recent years, the pharmaceutical and biotechnology industries have undergone substantial restructuring and consolidation. Additional mergers or consolidation within the pharmaceutical and biotechnology industries could cause us to lose existing customers and potential future customers, which could have a material adverse impact on our results of operations. Approximately 25% of our sales are generated from demand for our products used in the Academia customer class by researchers at universities, government laboratories and private foundations, and whose funding is dependent upon grants from government agencies, such as the U.S. National Institutes of Health (NIH). Although the level of research funding has been increasing in recent years, we cannot assure you that this trend will continue given federal and state budget constraints. Government funding of research and development is subject to the political process, which is inherently unpredictable. Future sales may be adversely affected if our customers delay purchases as a result of uncertainties regarding the approval of government or industrial budget proposals. Also, government proposals to reduce or eliminate budgetary deficits have sometimes included reduced allocations to the NIH and government agencies in other countries that fund life sciences research and development activities.

We rely on collaborative commercial relationships to develop some of our products.

Our long-term business strategy involves entering into strategic alliances as well as marketing and distribution arrangements with academic, corporate and other partners relating to the development, commercialization, marketing and distribution of certain of our existing and potential products. We may be unable to continue to negotiate these collaborative arrangements on acceptable terms, and these relationships also may not be scientifically or commercially successful. In addition, we may be unable to maintain these relationships, and our collaborative partners may pursue or develop competing products or technologies, either on their own or in collaboration with others.

Some of our customers are requiring us to change our sales arrangements to lower their costs, and this may limit our pricing flexibility and harm our business.

Some of our customers have developed purchasing initiatives to reduce the number of vendors from which they purchase products to lower their supply costs. In some cases, these customers have established agreements with large distributors, which include discounts and direct involvement in the distributor’s purchasing process. These activities may force us to supply large distributors with our products at discounts in order to continue providing products to some customers. For similar reasons, many larger customers, including the U.S. government, have requested, and may request in the future, special pricing arrangements, which can include blanket purchase agreements. These agreements may limit our pricing

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MANAGEMENT REPORT Opportunities and Risks

flexibility, which could harm our business and affect our results of operations. For a limited number of customers, and at the customer’s request, we have conducted sales transactions through third-party online intermediaries to whom we are required to pay commissions.

The time and expense needed to obtain regulatory approval and respond to changes in regulatory requirements could adversely affect our ability to commercially distribute our products and generate sales.

We and our customers operate in a highly regulated environment characterized by continuous changes in the governing regulatory framework, particularly for product approvals. Genetic research activities and products commonly referred to as “genetically engineered” (such as certain food and therapeutic products) are subject to extensive governmental regulation in most developed countries, especially in the major markets for pharmaceutical and diagnostic products such as the European Union, the U.S. and Japan. In recent years, several highly publicized scientific events (most notably in genomic research and “cloning”) have prompted intense public debates on the ethical, philosophical and religious implications of an unlimited expansion in genetic research and the use of products emerging from this research. As a result of this debate, some key countries may increase existing regulatory barriers, which could adversely affect demand for our products and prevent us from fulfilling our growth expectations. Furthermore, there can be no assurance that any future changes of applicable regulations will not require further expenditures or an alteration, suspension or liquidation of our operations in certain areas, or even in their entirety.

We heavily rely on air cargo carriers and other overnight logistics services, and shipping delays or interruptions could harm our business.

Our customers in the scientific research markets typically only keep a modest inventory of our products on hand, and consequently require overnight delivery of purchases. As a result, we heavily rely on air cargo carriers and logistic suppliers. If overnight services are suspended or delayed, and other delivery carriers and logistic suppliers cannot provide satisfactory services, customers may suspend a significant amount of their work.

Our success depends on the continued employment of our key personnel, any of whom we may lose at any time.

Our senior management consists of an Executive Committee comprised of the Managing Directors and our most senior executives responsible for core functions. Although we have not experienced any difficulties attracting or retaining key management and scientific staff, our ability to recruit and retain qualified, skilled employees will continue to be critical to our success. Given the intense competition for experienced scientists among pharmaceutical and biotechnology companies as well as academic and other research institutions, there can be no assurance that we will be able to attract and retain employees critical to our success on acceptable terms. Initiatives to expand QIAGEN will also require additional employees, including management with expertise in areas such as manufacturing and marketing, and the development of existing managers to lead a growing organization.

Changes in tax laws or their application could adversely affect our results of operations.

The integrated nature of our worldwide operations enables us to reduce the effective tax rate on our earnings since a portion of our earnings are taxed at more favorable rates in some jurisdictions. Changes in tax laws or their application with respect to matters such as changes in tax-rates, transfer pricing and income allocation, utilization of tax loss carry forwards, intercompany dividends, controlled corporations, and limitations on tax relief allowed on the interest on inter-company debt, and changes to tax credit mechanisms, could increase our effective tax rate and adversely affect our results of operations.

The U.S. healthcare reform law could affect our business.

Comprehensive healthcare reform legislation was signed into law in the U.S. in 2010. Although we cannot fully predict the many ways in which this healthcare reform might affect our business, the law imposes a 2.3% excise tax on certain transactions, including many sales of medical devices, which we expect will include the U.S. sales of our assays and instruments. This tax will apply to U.S. sales of all taxable medical devices occurring after December 31, 2012. The increased tax burden may adversely affect our results of operations.

Our business may require substantial additional capital.

Our future capital requirements and level of expenses will depend upon numerous factors. We currently anticipate that our short-term capital requirements will be satisfied by cash

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flow from our operations. As of December 31, 2011, we had short-term debt of $142.3 million due and paid in January 2012 and outstanding long-term loan facilities of approximately $447.6 million, of which $1.6 million is current and due in 2012. Furthermore, as of December 31, 2011, we have capital lease obligations, including the current portion, of $23.5 million, that expire in various years through 2018. We may need to refinance all or part of these liabilities before or at their contractual maturities. We currently do not foresee that this will happen, but if at some point in time our existing resources should be insufficient to fund our activities, we may need to raise funds through public or private debt or equity financings. The funds for the refinancing of existing liabilities or for the ongoing funding of our business may not be available or, if available, not on terms acceptable to us. If adequate funds are not available, we may be required to reduce or delay expenditures for research and development, production, marketing, capital expenditures and/or acquisitions, which could have a material adverse effect on our business and results of operations. To the extent that additional capital is raised through the sale of equity or convertible securities, the issuance of any securities could result in dilution to our shareholders.

An impairment of goodwill and intangible assets could reduce our earnings.

At December 31, 2011, our consolidated balance sheet reflected approximately $1.7 billion of goodwill and approximately $819.5 million of intangible assets. Goodwill is recorded when the purchase price of a business exceeds the fair market value of the tangible and separately measurable intangible net assets. U.S. generally accepted accounting principles (U.S. GAAP) requires us to test goodwill for impairment on an annual basis or when events or circumstances occur indicating that goodwill might be impaired. Long-lived assets, such as intangible assets with finite useful lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable.

Doing business internationally creates certain risks for our business.

Our business involves operations in several countries outside of the U.S. Our consumable manufacturing facilities are located in Germany, China, the United Kingdom and the U.S., and our instrumentation facilities are located in Switzerland. We have established sales subsidiaries in numerous countries including the U.S., Germany, Japan, the United Kingdom, France, Switzerland, Australia, Canada, the Netherlands, Sweden, Italy, Hong Kong, Singapore, Turkey, Korea, Malaysia, China, Spain, Brazil, Mexico and India. In addition, our products are sold through independent distributors serving more than 40 other countries. Conducting and launching operations on an international scale requires close coordination of activities across multiple jurisdictions and time zones and consumes significant management resources. We have invested heavily in computerized information systems in order to manage more efficiently the widely dispersed components of our operations. If we fail to coordinate and manage these activities effectively, our business and results of operations will be adversely affected. Our operations are subject to other risks inherent in international business activities, such as general economic conditions in the countries in which we operate, overlap of different tax structures, unexpected changes in regulatory requirements, compliance with a variety of foreign laws and regulations, and longer accounts receivable payment cycles in certain countries. Other risks associated with international operations include import and export licensing requirements, trade restrictions, exchange controls and changes in tariff and freight rates, as may occur as a result of rising energy costs.

Exchange rate fluctuations may adversely affect our business and operating results.

Since we currently market our products throughout the world, a significant portion of our business is conducted in currencies other than the U.S. dollar, our reporting currency. As a result, fluctuations in value, relative to the U.S. dollar, of the currencies in which we conduct our business have caused and will continue to cause foreign currency transaction gains and losses. Foreign currency transaction gains and losses arising from normal business operations are charged against earnings in the period when incurred. We hedge a portion of the anticipated cash flow that we expect to exchange into other currencies, subject to our short-term financing needs. Due to the number of currencies involved, the variability of currency exposures and the potential volatility of currency exchange rates, we cannot predict the effects of future exchange rate fluctuations. While we may engage in foreign exchange hedging transactions to manage our foreign currency exposure, there can be no assurance that our hedging strategy will adequately protect our operating results from the effects of future exchange rate fluctuations.

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MANAGEMENT REPORT Opportunities and Risks

We depend on patents and proprietary rights that may fail to protect our business.

Our success depends to a large extent on our ability to develop proprietary products and technologies and to establish and protect our patent and trademark rights in these products and technologies. As of December 31, 2011, we owned 186 issued patents in the United States, 136 issued patents in Germany and 740 issued patents in other major industrialized countries. In addition, at December 31, 2011, we had 1,045 pending patent applications, and we intend to file applications for additional patents as our products and technologies are developed. The patent positions of technology-based companies, including our Company, involve complex legal and factual questions and may be uncertain, and the laws governing the scope of patent coverage and the periods of enforceability of patent protection are subject to change. In addition, patent applications in the United States are maintained in secrecy until patents issue, and publication of discoveries in the scientific or patent literature tends to lag behind actual discoveries by several months. Therefore, no assurance can be given that patents will issue from any patent applications that we own or license or if patents do issue, that the claims allowed will be sufficiently broad to protect our technology. In addition, no assurance can be given that any issued patents that we own or license will not be challenged, invalidated or circumvented, or that the rights granted thereunder will provide us competitive advantages. Further, as issued patents expire, we may lose some competitive advantage as others develop competing products and as a result, we may lose revenue.

We are subject to risks associated with patent litigation.

The biotechnology industry has been characterized by extensive litigation regarding patents and other intellectual property rights. We are aware that patents have been applied for and/or issued to third parties claiming technologies for the Sample & Assay Technologies that are closely related to those we use. From time to time, we receive inquiries requesting confirmation that we do not infringe patents of third parties. We endeavor to follow developments in this field, and we do not believe that our technologies or products infringe any proprietary rights of third parties. However, there can be no assurance that third parties will not challenge our activities and, if so challenged, that we will prevail. In addition, the patent and proprietary rights of others could require that we alter our products or processes, pay licensing fees or cease certain activities, and there can be no assurance that we will be able to license any technologies that we may require on acceptable terms. In addition, litigation, including proceedings that may be declared by the U.S. Patent and Trademark Office or the International Trade Commission, may be necessary to respond to any assertions of infringement, enforce our patent rights and/or determine the scope and validity of our proprietary rights or those of third parties. Litigation could involve substantial cost, and there can be no assurance that we would prevail in any proceedings.

Our business exposes us to potential product liability.

The marketing and sale of our products and services for certain applications entail a potential risk of product liability. Although we are not currently subject to any material product liability claims, product liability claims may be brought against us in the future. Further, there can be no assurance that our products will not be included in unethical, illegal or inappropriate research or applications, which may in turn put us at risk of litigation. We carry product liability insurance coverage, which is limited in scope and amount, but that we believe is currently appropriate for us. There can be no assurance, however, that we will be able to maintain this insurance at a reasonable cost and on reasonable terms, or that this insurance will be adequate to protect us against any or all potential claims or losses. We are subject to various laws and regulations generally applicable to businesses in the different jurisdictions in which we operate, including laws and regulations applicable to the handling and disposal of hazardous substances. Although we believe that our procedures for the handling and disposal of hazardous materials comply with the standards prescribed by applicable regulations, the risk of accidental contamination or injury from these materials cannot be completely eliminated

Our operations have inherent IT risks.

Business and production process are increasingly dependent on information technology systems. Major disruptions or failure of global or regional business systems may result in the loss of data and/or impairment of business and production processes. QIAGEN has established a global IT organization with rules and regulations that define the relevant roles and responsibilities. Technical precautions have been established together with our IT service providers to address this risk.

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Performance Review

Forward-looking and Cautionary Statements

This report contains forward-looking statements that are subject to risks and uncertainties. These statements can be identified by the use of forward-looking terminology, such as “believe”, “hope”, “plan”, “intend”, “seek”, “may”, “will”, “could”, “should”, “would”, “expect”, “anticipate”, “estimate”, “continue” or other similar words. Such statements are based on management’s current expectations and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. We caution investors that there can be no assurance that actual results or business conditions will not differ materially from those projected or suggested in such forward-looking statements as a result of various factors, including, but not limited to, the following: risks associated with our expansion of operations, including the acquisition of new businesses; variability in our operating results from quarter to quarter; management of growth, international operations, and dependence on key personnel; intense competition; technological change; our ability to develop and protect proprietary products and technologies and to enter into and maintain collaborative commercial relationships; our future capital requirements; general economic conditions and capital market fluctuations; and uncertainties as to the extent of future government regulation of our business. As a result, our future success involves a high degree of risk. For further information, refer to the more specific risks and uncertainties discussed under the caption “Risk Factors” in Item 3 of the 2011 Annual Report on Form 20-F on file with the U.S. Securities and Exchange Commission and throughout this Annual Report.

Results of Operations

Overview

QIAGEN is the world’s leading provider of innovative Sample & Assay Technologies, based on independent market studies of United States and European market shares for our products and technologies. Our automated systems and consumable products empower customers to transform raw biological samples into valuable molecular information. Sample technologies are used to isolate DNA, RNA and proteins from any biological sample, such as blood or tissue. Assay technologies are then used to amplify, enrich and provide results for analysis of biomolecules, such as the DNA of a virus or a mutation of a gene.

We sell our products, sample and assay kits known as consumables and automated instrumentation systems using those technologies, to four major customer classes:

| • |  | Molecular Diagnostics – healthcare providers supporting many aspects of patient care including prevention, profiling of diseases, personalized healthcare and point of need testing

| • |  | Applied Testing – customers using molecular technologies in fields such as forensics, veterinary diagnostics and food safety testing

| • |  | Pharma – drug discovery and development efforts of pharmaceutical and biotechnology companies

| • |  | Academia – researchers exploring the secrets of life such as the mechanisms and pathways of diseases, and in some cases translating that research into drug targets or commercial applications

QIAGEN markets products in more than 100 countries throughout the world. We have established subsidiaries in markets we believe have the greatest sales potential, including countries throughout Europe, Asia, the Americas and Australia. We also work with specialized independent distributors and importers. As of December 31, 2011, we employed approximately 3,900 people in more than 35 locations worldwide.

In 2011, operating income on a consolidated basis was $99.6 million, a 47% decline from $188.5 million in 2010, which in turn was a 5% increase compared from $180.2 million in 2009. The 2011 decline was due to the impact of a restructuring-related charge in the fourth quarter of 2011 as well as charges related to the acquisitions of Cellestis and Ipsogen.

We have delivered five-year compound annual growth rates of approximately 20% in net sales and 6% in net income through 2011, as reported under U.S. GAAP. We have funded our growth through internally generated funds, debt, and private and public sales of equity securities.

Recent Acquisitions

QIAGEN has made a number of strategic acquisitions since 2009, expanding our technology and product offerings as well as extending our geographic presence. These transactions include:

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| • |  | In August 2011, we acquired Cellestis Ltd., a publicly listed Australian company that develops and provides in vitro diagnostics and life science research products based on its proprietary QuantiFERON technology. The technology provides information on the activity of the cell-mediated functions of the immune system from whole blood samples. By tapping into the body’s memory system, this approach allows detection of diseases much earlier than other diagnostic methods, such as PCR. With QuantiFERON, we are adding a “pre-molecular” technology that is complementary to our DNA-based molecular testing franchise. QuantiFERON is a trademark of Cellestis, Ltd.

| • |  | In July 2011, we entered into binding agreements with a group of major shareholders of Ipsogen S.A. and purchased a majority of the Ipsogen shares. Ipsogen S.A., a publicly listed French company that is a global leader in molecular profiling and personalized healthcare diagnostics for a broad range of blood cancers. In October 2011, we initiated a public tender offer for the remaining shares. By year-end 2011, we had acquired 89% of the shares of Ipsogen. QIAGEN intends to fully acquire Ipsogen through future public offers.

| • |  | In January 2010, we acquired ESE GmbH, now QIAGEN Lake Constance GmbH, a German developer and manufacturer of portable, battery-operated, “ultra-fast time to result” multiplex UV and fluorescence optical measurement devices. ESE’s systems for point of need testing in healthcare and applied testing enable low-throughput molecular testing in physician practices, emergency rooms, remote field areas, and other settings where a laboratory infrastructure is not accessible and fast turnaround is required.

| • |  | In December 2009, we acquired SABiosciences Corporation, a U.S. company that holds a leading position in the design and commercialization of disease- and pathway-focused real-time PCR-based assay panels (PCR Arrays), which are widely utilized in biomedical research and in development of new drugs and diagnostics.

| • |  | In September 2009, we acquired DxS Ltd, now QIAGEN Manchester, a pioneer in development and marketing of companion diagnostics that enable physicians to predict patient responses in order to make cancer therapies more effective. Headquartered in the U.K., QIAGEN Manchester, Ltd brings a portfolio of molecular diagnostic assays and related intellectual property, as well as a deep pipeline of companion diagnostic partnerships in oncology with leading pharmaceutical companies. The acquisition has given QIAGEN a QIAGEN Annual Report 2011 leading position in personalized healthcare and strengthen our overall strategic position in Molecular Diagnostics.

Our financial results include the contributions of our recent acquisitions from the date of acquisition, as well as costs related to the acquisitions and integrations of the acquired companies, such as the relocation and closure of certain facilities.

Other Changes

During 2010, we determined that QIAGEN operates as one business segment in accordance with ASC Topic 280, Segment Reporting. Our decision-making process has evolved as a result of continued growth, restructuring and streamlining of the organization, and revised internal budgeting and reporting approaches. Our chief operating decision maker (CODM) now makes decisions on business operations and resource allocation based on evaluations of the QIAGEN Group as a whole. With revenues derived from our entire product and service offerings, it is not practicable to provide a detail of revenues for each group of similar products and services or for each customer group, as full discrete financial information is not available. Considering the acquisitions made during 2011, we determined that we still operate as one business segment. However, we do provide certain revenue information by customer class to allow better insight into our operations. This information is estimated using certain assumptions to allocate revenue among the customer classes.

In March 2010, the U.S. President signed the Patient Protection and Affordable Care Act and a reconciliation bill that amended the Health Care and Education Reconciliation Act of 2010 (collectively, the “Acts”). As a result of the Acts, a 2.3% excise tax will be imposed on the sale, including leases, of any taxable medical devices by the manufacturer, producer or importer of such devices. A “taxable medical device” is any FDA-regulated device intended for human use. The excise tax will apply to U.S. sales of all taxable medical devices occurring after December 31, 2012. While we continue to evaluate the potential impact at the present time, we expect a net positive impact from the Acts effective 2013 due to the expected increase in net sales resulting from increased healthcare coverage, which will be partially offset by the excise tax.

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2011 compared to 2010

Net Sales

In 2011, net sales increased 8% to $1,169.7 million compared to $1,087.4 million in 2010. This increase in net sales reflected a positive impact of 4% from foreign exchange rates, an organic sales increase of 2% and sales from our recently acquired businesses of 2%. In 2011, consumable and related revenues, which represent approximately 87% of total sales, increased 8% as compared to 2010. Sales of instrumentation products, which represent 13% of net sales, increased 5% in 2011. QIAsymphony placements contributed to growth in cash sales and to growing pro-rata contributions under multiyear reagent rental agreements implemented since the launch of the full QIAsymphony RGQ system in late 2010.

In Molecular Diagnostics, which represents approximately 47% of net sales, we achieved an increase of 9% in 2011 compared to 2010. In 2011, healthcare-related sales advanced based on the global rollout of the QIAsymphony automation platform and increasing use of our companion diagnostics portfolio in Europe and other markets outside the U.S. Personalized Healthcare revenues also benefited from milestone payments for co-development projects with pharmaceutical companies. Global HPV (human papillomavirus) test sales were slightly lower in 2011, due mainly to the decline in U.S. sales linked to reduced demand for tests amid ongoing challenging economic conditions. Net sales in 2011 also included first-time contributions from Cellestis and Ipsogen, both of which were acquired in the second half of 2011.

In Applied Testing, which represents approximately 7% of net sales, we achieved 4% growth in 2011 compared to 2010, primarily as a result of higher instrumentation sales. Consumable sales of human identification and forensics products increased, benefitting from new European standards. Applied Testing also saw contributions from new veterinary testing and food safety products.

In Pharma, which represents approximately 20% of net sales, we experienced 7% growth in 2011 compared to 2010, led by a demand for products used in oncology research as well as the GeneGlobe portfolio. Also contributing to the growth was ongoing expansion of Certal products used on QIAsymphony for quality control in biopharmaceutical processing.

In Academia, which represents approximately 26% of net sales, we experienced 7% growth in 2011 compared to 2010, reflecting increased sales in consumable and instrumentation products following the success of targeted growth initiatives, primarily in Europe and Asia/Pacific. The Americas delivered flat sales amid ongoing budget uncertainty and cautious spending.

A significant portion of our revenues is denominated in euros and currencies other than the United States dollar. Changes in currency exchange rates can affect net sales, potentially to a significant degree. Net sales were positively impacted by $33.9 million in currency exchange movements for 2011 as compared to 2010.

Gross Profit

Gross profit was $749.8 million, or 64% of net sales, in 2011, compared to $715.6 million, or 66% of net sales, in 2010. The decline in gross margin was due to several factors. Generally, our consumable sample and assay products have a higher gross margin than our instrumentation products and service arrangements. Fluctuations in the sales levels of these products and services can result in fluctuations in gross margin between periods. An increase in milestone payments from companion diagnostic co-development arrangements in 2011 negatively affected the margin since the gross margin on these services is significantly below the margin on product sales. In addition, the QuantiFERON TB product acquired with the Cellestis acquisition in 2011 carries a lower gross margin. Gross margin also was negatively impacted by 2011 costs related to the relocation of production facilities, including moving into newly constructed production space in Hilden, Germany. Additionally, gross margin in 2011 reflects costs incurred following the Japanese earthquake and other natural disasters in the first half of 2011, as well as costs related to the restructuring announced late in 2011.

Amortization expense related to developed technology and patent and license rights acquired in a business combination is included in cost of sales. The amortization expense on acquisition-related intangibles within cost of sales increased to $70.2 million in 2011 from $61.8 million in 2010, as a result of an increase in intangibles acquired in recent business combinations. We expect our acquisition-related intangible amortization to continue to increase as a result of acquisitions.

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In addition, during 2011, a total of $9.6 million was expensed to acquisition and restructuring-related cost of sales in connection with the relocation of production facilities as well as the write-up of acquired inventory to fair market value as a result of business combinations. In accordance with purchase accounting rules, acquired inventory was written up to fair market value and subsequently expensed as the inventory was sold. In 2010, this expense was $1.3 million.

Research and Development

Research and development expenses increased by 4% to $130.6 million (11% of net sales) in 2011, compared to $126.0 million (12% of net sales) in 2010. The increase in research and development expense was positively affected by $5.5 million of currency exchange impact in 2011. Our business combinations, along with the acquisition of new technologies, have resulted in an increase in research and development costs. As we continue to discover, develop and acquire new products and technologies, we expect to incur additional expenses related to facilities, licenses and employees engaged in research and development efforts. Additionally, research and development costs are expected to increase as a result of seeking regulatory approvals, including U.S. FDA Pre-Market Approval (PMA), U.S. FDA 510(k) clearance and EU CE approval of certain assays or instruments. We have a strong commitment to innovation and expect to continue to make investments in our research and development efforts.

Sales and Marketing

Sales and marketing expenses increased 15% to $307.3 million (26% of net sales) in 2011 from $267.5 million (25% of net sales) in 2010. The increase in sales and marketing expenses reflects the acquisitions in 2011 along with increased sales and marketing investments to globalize the newly acquired Cellestis and Ipsogen product portfolios, as well as our investment in new sales subsidiaries in India and Taiwan. The increase also includes $11.3 million of currency exchange impact in 2011. Sales and marketing expenses are primarily associated with personnel, commissions, advertising, trade shows, publications, freight and logistics expenses and other promotional expenses. In addition, the sales and marketing expenses include the costs of maintaining separate sales organizations addressing customers in Molecular Diagnostics, Applied Testing, Pharma and Academia. We anticipate that sales and marketing costs will continue to increase along with new product introductions and growth in sales of our products, but we expect sales and marketing costs will grow at a relatively slower rate than our overall revenue growth over the long term.

General and Administrative, Integration and Other

General and administrative, business integration, restructuring and related costs increased by 69% to $185.5 million (16% of net sales) in 2011 from $110.0 million (10% of net sales) in 2010. The net increase is due primarily to $72.4 million in restructuring costs in 2011 related to internal restructuring of subsidiaries, including severance and retention costs, plus increased costs in connection with our 2011 acquisitions, partially offset by operational efficiencies. The restructuring costs primarily relate to a project we began in late 2011 to enhance productivity by streamlining the organization and freeing up resources for reallocation to strategic initiatives to help drive growth and innovation, strengthen our industry leadership position and improve longer-term profitability. This project aims to eliminate organizational layers and overlapping structures, actions that will enhance our processes, speed and productivity. Additionally, general and administrative, integration and related costs increased by $3.8 million due to currency impact in 2011, compared to the same period of 2010. During 2011, we incurred acquisition costs of approximately $13.9 million, primarily in connection with the acquisitions of Cellestis and Ipsogen. We have continued to incur integration costs for businesses acquired, totaling approximately $6.2 million in 2011, compared to $10.1 million in 2010. In connection with the integration of the acquired companies, we aim to improve efficiency in general and administrative operations. As we further integrate the acquired companies and pursue other opportunities to gain efficiencies, we expect to continue to incur additional business integration and restructuring costs in 2012. Over time, we believe the integration and restructuring activities will reduce general and administrative expenses as we improve efficiency in general and administrative operations.

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Acquisition-Related Intangible Amortization

Amortization expense related to developed technology and patent and license rights acquired in a business combination is included in cost of sales. Amortization of trademarks, customer base and noncompete agreements acquired in a business combination is recorded in operating expense under the caption “acquisition-related intangible amortization.” Amortization expenses of intangible assets not acquired in a business combination are recorded within cost of sales, research and development, or sales and marketing line items based on the use of the asset.

During 2011, amortization expense on acquisition-related intangibles within operating expense increased to $26.7 million, compared to $23.5 million in 2010. The increase in expense is the result of an increase in amortized intangibles acquired in our recent business combinations. We expect acquisition-related intangible amortization to continue to increase as a result of our acquisitions.

Other Income (Expense)

Other expense was $3.4 million in 2011, compared to $15.4 million in 2010. The decrease in total other expense in 2011 was primarily the result of increased interest income, lower interest expense and higher foreign currency gains, partially offset by lower income from equity method investees.

Interest expense decreased to $25.4 million in 2011, compared to $27.8 million in 2010. Interest costs primarily relate to long-term debt, discussed in Note 16 in the accompanying notes to the consolidated financial statements. The decrease in interest expense is primarily due to a lower outstanding debt balance following repayments of $469.9 million in 2011.

For the year ended December 31, 2011, interest income increased to $6.1 million from $4.5 million in 2010. The increase in interest income was primarily due to higher short-term investments during the first half of 2011.

For the year ended December 31, 2011, gains on foreign currency transactions increased to $12.4 million from $2.6 million in 2010, primarily as a result of favorable currency fluctuations while funding the Cellestis acquisition.

Provision for Income Taxes

In 2011 and 2010, our effective tax rates were 1.3% and 17%, respectively. Our operating subsidiaries are exposed to effective tax rates ranging from zero up to more than 40%. Fluctuations in the distribution of pre-tax income among our operating subsidiaries can lead to fluctuations of the effective tax rate in the consolidated financial statements. The effective rate for 2011 was impacted by restructuring charges, including impairments, that lowered the mix of earnings in our higher taxing jurisdictions. In addition, we realized a full-year benefit of the tax planning implemented in 2010, as well as a partial benefit recognized from additional tax planning where implementation began late in 2011.

Foreign Currencies

QIAGEN N.V.’s reporting currency is the U.S. dollar, and most of our subsidiaries’ functional currencies are the local currencies of the countries in which they are headquartered. All amounts in the financial statements of entities whose functional currency is not the U.S. dollar are translated into U.S. dollar equivalents at exchange rates as follows: (1) assets and liabilities at period-end rates, (2) income statement accounts at average exchange rates for the period, and (3) components of shareholders’ equity at historical rates. Translation gains or losses are recorded in shareholders’ equity, and transaction gains and losses are reflected in net income. The net gain (loss) on foreign currency transactions in 2011, 2010 and 2009 was $12.4 million, $2.6 million and $5.6 million, respectively, and is included in other income (expense), net.

Derivatives and Hedging

In the ordinary course of business, we use derivative instruments, including swaps, forwards and/or options, to manage potential losses from foreign currency exposures and variable-rate debt. The principal objective of such derivative instruments is to minimize the risks and/or costs associated with global financial and operating activities. We do not utilize derivative or other financial instruments for trading or other speculative purposes. All derivatives are recognized as either assets or liabilities in the balance sheet and are measured at fair value with any change in fair value recognized in earnings in the period of change, unless the derivative qualifies as an effective hedge that offsets certain exposures. In determining fair value, we consider both the counterparty

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credit risk and our own creditworthiness. To determine our own credit risk we estimate our own credit rating by benchmarking the price of our outstanding debt to publicly available comparable data from rated companies. Using the estimated rating, we quantify our credit risk by reference to publicly traded debt with a corresponding rating.

Foreign Currency Derivatives. As a globally active enterprise, we are subject to risks associated with fluctuations in foreign currencies in our ordinary operations. This includes foreign currency-denominated receivables, payables, debt and other balance sheet positions, including intercompany items. We manage our balance sheet exposure on a group-wide basis primarily using foreign exchange forward contracts.

Interest Rate Derivatives. We have used interest rate derivative contracts on certain borrowing transactions to hedge fluctuating interest rates. We entered into interest rate swaps in which we agreed to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. The interest swaps matured in 2011.

We make use of ‘economic hedges’ – i. e., derivatives that do not have a formally designated hedging relationship – as well as ‘accounting hedges.’ All derivatives that qualify for hedge accounting are ‘cash-flow hedges.’ Further details of our derivative and hedging activities can be found in Note 7 to the accompanying consolidated financial statements.

Liquidity and Capital Resources

To date, we have funded our business primarily through internally generated funds, debt, and private and public sales of equity. Our primary use of cash has been to support continuing operations and our capital expenditure requirements including construction of new facilities and acquisitions. As of December 31, 2011 and 2010, we had cash and cash equivalents of $221.1 million and $828.4 million, respectively. We also had short-term investments of $54.6 million at December 31, 2011. Cash and cash equivalents are primarily held in U.S. dollars and euros, other than those cash balances maintained in the local currency of subsidiaries to meet local working capital needs. At December 31, 2011, cash and cash equivalents had decreased by $607.3 million from December 31, 2010, primarily due to cash used in investing activities of $540.3 million and cash used in financing activities of $310.6 million partially offset by cash provided by operating activities of $244.8 million. As of December 31, 2011 and 2010, we had working capital of $266.8 million and $976.2 million, respectively.

Operating Activities. For the years ended December 31, 2011 and 2010, we generated net cash from operating activities of $244.8 million and $250.8 million, respectively. While net income of $94.9 million in 2011 decreased by $49.3 million as compared to the prior year, the non-cash components such as depreciation and amortization, share-based compensation, deferred income taxes and other non-cash activity including restructuring measures increased cash from operating activities by $210.4 million as of December 31, 2011. This increase was partially offset by net changes in operating assets and liabilities of $42.9 million, primarily due to an increase in inventories and accounts receivable. In 2011, inventories increased primarily due to increased safety stock in connection with the transfer of production activities to a new production facility in Germany. Because we rely heavily on cash generated from operating activities to fund our business, a decrease in demand for our products, longer collection cycles or significant technological advances of competitors would have a negative impact on our liquidity.

Investing Activities. Approximately $540.3 million of cash was used in investing activities during 2011, compared to $215.5 million during 2010. Investing activities during 2011 consisted principally of $186.8 million invested in short-term investments, $86.8 million in cash paid for purchases of property and equipment, primarily in our ongoing construction projects in Germany and the U.S., as well as $34.6 million paid for intangible assets. Cash paid for acquisitions, net of cash acquired, of $457.5 million was used primarily in the acquisitions of Cellestis and Ipsogen and includes $3.1 million of cash paid in connection with acquisition milestone achievements. As of December 31, 2011, we also acquired a stake in Alacris for $3.4 million and made an investment of $16.4 million in another privately held company. These investing activities were partially offset by $242.6 million from the sale of short-term investments.

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In 2009, we purchased the land and building adjacent to our facility in Hilden, Germany, for € 2.5 million (approximately $3.2 million) to further expand our German facilities for research and development and production. In addition, we started the expansion of our Germantown, Maryland, facility for production and administrative space in June 2010. While the construction in Germany is substantially complete, the U.S. expansion projects are expected to continue into 2014, with both projects at an estimated total cost of approximately $94.0 million. We anticipate that we will be able to fund these expansions with cash generated by operating activities.

In connection with certain acquisitions, we could be required to make additional contingent cash payments totaling up to $103.1 million based on the achievement of certain revenue and operating results milestones as follows: $26.5 million in 2012, $11.1 million in 2013, $12.3 million in 2014, $4.7 million in 2015, $6.4 million in 2016 and $42.1 million payable in any 12-month period from now until 2016 based on the accomplishment of certain revenue targets, the launch of certain products or the grant of certain patent rights. Of the $103.1 million total contingent obligation, approximately $39.8 million is accrued as of December 31, 2011.

Financing Activities. Financing activities used $310.6 million in cash for the year ended December 31, 2011 compared to $35.2 million for 2010. Cash used during 2011 was primarily related to the repayment of long-term of debt of $469.9 million partially offset by proceeds of short-term and long-term debt of $142.3 million and $44.0 million respectively. Also in 2011, $29.8 million was used to purchase additional shares of Ipsogen’s noncontrolling interest and other cash payments of $7.6 million were related to milestone payments from previous acquisitions. Cash used during 2010 was primarily due to the repayment of $50.0 million of long-term debt and capital lease payments, partially offset by proceeds from debt as well as cash provided by the issuance of common shares in connection with our equity compensation plans and tax benefits from stock-based compensation.

In December 2011, we entered into a €400.0 million syndicated multi-currency revolving credit facility expiring December 2016 of which €110.0 million (approximately $142.3 million) was utilized at December 31, 2011, and is due in 2012. We have additional credit lines totaling $8.6 million at variable interest rates, none of which was utilized as of December 31, 2011. We also have capital lease obligations, including interest, in the aggregate amount of $23.5 million, and carry $447.6 million of long-term debt, of which $1.6 million is current as of December 31, 2011. As of December 31, 2011, we have drawn down € 1.6 million under a loan to finance research and development projects in Germany. The loan bears interest at 3.5% and is due to be fully repaid by 2013.

In July 2007, we signed a Syndicated Multi-Currency Term Loan and Revolving Credit Facilities Agreement with Deutsche Bank AG, Deutsche Bank Luxembourg S.A., and the lenders named in the syndication agreement. We used the proceeds of the term loan and the bridge loan to pay the cash component of the Digene acquisition consideration and the fees and expenses of the Digene offer and the merger. During 2011, we repaid the debt in full.

We have notes payable, which are the long-term borrowings of the proceeds from the issuances of $150.0 million senior unsubordinated convertible notes, with a 1.5% coupon due in 2024 through QIAGEN Finance (2004 Notes), and of $300.0 million 3.25% senior convertible notes (2006 Notes) due in 2026 through QIAGEN Euro Finance. QIAGEN Finance and Euro Finance are unconsolidated subsidiaries, which were established for this purpose. The 2004 Notes are convertible into our common shares at a conversion price of $12.6449, subject to adjustment, and the 2006 Notes are convertible into our common shares at a conversion price of $20.00, subject to adjustment. In connection with conversion of $5.0 million of the 2004 Notes, we repaid $5.0 million of the debt to QIAGEN Finance. At December 31, 2011, $145.0 million and $300.0 million are included in long-term debt for the amount of the notes payable to QIAGEN Finance and Euro Finance, respectively. The $145.0 million note payable has an effective rate of 1.84%, and had an original maturity in July 2011. We refinanced the $145.0 million note, which has a new maturity date of February 2024. The $300.0 million note payable has an effective rate of 3.97% and is due in December 2014. QIAGEN N.V. has guaranteed the 2004 and 2006 Notes and has agreements with QIAGEN Finance and Euro Finance to issue shares to the investors in the event of conversion. These subscription rights, along with the related receivable, are recorded at fair value in the equity of QIAGEN N.V. as paid-in capital.

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We expect that cash from financing activities will continue to be impacted by issuances of our common shares in connection with our equity compensation plans and that the market performance of our stock will impact the timing and volume of the issuances. Additionally, we may make future acquisitions or investments requiring cash payments, the issuance of additional equity or debt financing.

We believe that funds from operations, existing cash and cash equivalents, together with the proceeds from our public and private sales of equity, and availability of financing facilities, will be sufficient to fund our planned operations and expansion during the coming year. However, the global economic downturn may have a greater impact on our business than currently expected, and we may experience a decrease in the sales of our products, which could impact our ability to generate cash. The availability of debt financing has also been negatively impacted by the global credit crisis. If our future cashflows from operations and other capital resources are not adequate to fund our liquidity needs, we may be required to obtain additional debt or equity financing or to reduce or delay our capital expenditures, acquisitions or research and development projects. If we could not obtain financing on a timely basis or at satisfactory terms, or implement timely reductions in our expenditures, our business could be adversely affected.

Off-Balance Sheet Arrangements

Other than our arrangements with QIAGEN Finance and Euro Finance as discussed above and in the notes to the consolidated financial statements, we did not use special purpose entities and do not have off-balance sheet financing arrangements as of and during the years ended December 31, 2011, 2010 and 2009.

Contractual Obligations

As of December 31, 2011, our future contractual cash obligations are as follows:

CONTRACTUAL OBLIGATIONS

|  | Payments Due by Period |
Contractual obligations (in $ thousand) |  | Total |  |  | 2012 |  |  | 2013 |  |  | 2014 |  |  | 2015 |  |  | 2016 |  |  | Thereafter |
Long-term debt |  |  | 447,622 |  |  |  | 1,617 |  |  |  | 486 |  |  |  | 300,000 |  |  |  | 519 |  |  |  | — |  |  |  | 145,000 |
Capital lease obligations |  |  | 23,503 |  |  |  | 4,008 |  |  |  | 4,191 |  |  |  | 4,366 |  |  |  | 4,640 |  |  |  | 3,674 |  |  |  | 2,624 |
Operating leases |  |  | 51,948 |  |  |  | 15,879 |  |  |  | 12,067 |  |  |  | 9,316 |  |  |  | 6,905 |  |  |  | 4,763 |  |  |  | 3,018 |
Purchase obligations |  |  | 80,738 |  |  |  | 54,686 |  |  |  | 25,556 |  |  |  | 496 |  |  |  | — |  |  |  | — |  |  |  | — |
License and royalty payments |  |  | 9,776 |  |  |  | 1,600 |  |  |  | 1,122 |  |  |  | 1,222 |  |  |  | 1,222 |  |  |  | 1,222 |  |  |  | 3,388 |
Total contractual cash obligations |  |  | 613,587 |  |  |  | 77,790 |  |  |  | 43,422 |  |  |  | 315,400 |  |  |  | 13,286 |  |  |  | 9,659 |  |  |  | 154,030 |

In addition to the above and pursuant to purchase agreements for several of our recent acquisitions, we could be required to make additional contingent cash payments totaling up to $103.1 million based on revenue and other milestones in 2012 and beyond.

Liabilities associated with uncertain tax positions, including interest, are currently estimated at $7.4 million and are not included in the table above, as we cannot reasonably estimate when, if ever, an amount would be paid to a government agency. Ultimate settlement of these liabilities is dependent on factors outside of our control, such as examinations by each agency and expiration of statutes of limitation for assessment of additional taxes.

Dividend

QIAGEN has not paid a cash dividend since its inception.

Credit Rating

QIAGEN is currently not rated by any credit rating agency.

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Human Resources

Overview

The skills, knowledge, dedication and passion of our employees are critical for the success of QIAGEN. We want to recruit, support and retain the best employees, offering performance-based remuneration, development opportunities and measures to balance work and family life. We are committed to diversity in our teams that reflect the various backgrounds of our business partners. At the end of 2011, QIAGEN had 3,938 full-time equivalent employees, a 10% increase from 3,587 at the end of 2010. Total personnel expenses in 2011 were $347 million compared to $334 million in 2010.

Training and Retention

At QIAGEN, we recognize that employees are our most important resource. Their exceptional talent, skill, and passion are key to our long-term success and corporate value. Employee development is therefore viewed as an integral success factor in creating lasting value for our customers, patients, colleagues, partners, and shareholders. QIAGEN has established a global Performance Enhancement System (PES) that creates a clear framework for regular, one-on-one review sessions in which managers discuss career development topics with each of their employees. These sessions include discussions of goals and their achievement, training needs and interests, career planning, organizational development, and the results of regularly performed “180° surveys.” Professional Training and Development at QIAGEN is an ongoing process reaching all employees, which cycles from PES to participation, review, follow-up, and back to PES.

Management Campus (MC)

This program, which is composed of two components, is designed to ensure the ongoing development of QIAGEN’s future management generations. MC I accelerates the careers of our professionals by providing insights into major management topics while focusing on individual development and business-related innovative actions. MC II is a senior executive program that is designed to invest in skill sets of QIAGEN’s senior managers.

QIAGEN Executive MBA Program

To support our future growth, QIAGEN offers employees the opportunity to participate in the QIAGEN Executive MBA Business Integration Program in cooperation with the University of Würzburg, Germany. The program provides professionals with a wide range of management skills and knowledge, which are key to an executive career in the industry and at QIAGEN in particular. Participants study in an international environment with colleagues from around the world. Two modules are conducted with partner universities in the U.S.: at Boston University in Boston, Massachusetts, and at Florida Gulf Coast University in Fort Myers, Florida.

Compensation System

Since the creation of QIAGEN, management has formed a culture that seeks to attract and retain the best talent worldwide and reward associates for their performance. This compensation system aims to foster focus on achieving corporate strategic initiatives as well as personal accountability.

It is critical for QIAGEN to offer attractive compensation packages on a global basis. According to the QIAGEN philosophy, an employee who achieves their performance objectives should generally be awarded compensation comparable to the median levels of compensation provided by relevant benchmark companies. QIAGEN participates in various compensation benchmarking surveys that provide information on the level, as well as the mix, of compensation awarded by various companies and industries for a broad range of positions around the world. In the case of QIAGEN, these include many peer life science and diagnostic companies based in the U.S.

QIAGEN has a “pay for performance” culture, with the compensation of employees linked to the achievement of corporate financial and individual performance goals. Business goals are established by the senior management. These goals are set at ambitious levels each year to motivate and drive performance, with a focus on both short-term and long-term quantifiable objectives. Performance metrics used for these goals include the achievement of targets for net sales, adjusted operating income and free cash flow. In 2011, the payments for short-term variable compensation were based on 77% achievement of the business goals.

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MANAGEMENT REPORT Human Resources

Compensation for a significant majority of employees worldwide includes fixed base compensation and benefits, which vary according to local market customs, as well as a short-term variable cash bonus. The level of fixed compensation is paid in cash, usually on a monthly basis, and is designed to provide the employee with a reasonable standard of living relative to the compensation offered by peer companies. The amount of short-term variable cash bonus is designed to reward performance, with the payout amount based on the achievement of overall corporate financial results as well as individual performance against a written set of objectives. In the case of the Managing Board members, the maximum individual bonus is equivalent to 40% of the annual fixed salary.

Furthermore, to align our compensation programs with the interests of shareholders, senior executives receive a portion of their total compensation in the form of long-term compensation, which is granted as equity as a reward for performance. These grants are determined on an individual basis and approved by the Compensation Committee. These equity grants are predominantly made in the form of Restricted Stock Units (RSUs) with a staggered vesting period typically over three (40%), five (50%) and 10 years (10%) and stock options, which have a staggered vesting period typically over three years.

Work-Life Balance

QIAGEN introduced services to help employees balance their personal life with our dynamic and driven work environment, including in-house corporate childcare and sabbatical programs, as well as company-sponsored fitness and health facilities, and programs. Flexible working hours apply to all employees except for functions that require on-time presence.

Workplace Health

In today’s business climate, the health of employees is often directly related to the health of the company. Increased job satisfaction, improved morale, reduced injuries, and increased productivity are just some of the benefits which a healthy work environment can have. At its headquarters, QIAGEN regularly offers “health days” where all employees are invited to receive free counsel and to participate in screening and nutrition programs, medical check-ups, etc. QIAGEN provides in-house gyms open to all employees, sports courses coached by professional trainers, and on-site soccer fields and beach volleyball courts, all free of charge. All female employees have free access to screening for HPV, the primary cause of cervical cancer.

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Future Perspectives

QIAGEN is playing a pivotal role in the molecular biology revolution by empowering customers to transform raw biological samples into valuable molecular information. We believe QIAGEN is in a strong position to take advantage of the significant opportunities thanks to our global leadership in Sample & Assay Technologies, which is underpinned by a stable and growing customer base, an excellent product portfolio and a pipeline of innovative projects.

QIAGEN believes the relevant global market for molecular diagnostics and life science research products totals approximately $70 billion. Among the fundamental growth drivers in the current business environment are ongoing breakthroughs and insights into molecular biology, new technologies to analyze molecular information, improvements in the quality and reductions in cost of healthcare using diagnostics, increasing demands for quality, and revenue streams made possible through consumable products.

We have grown substantially in recent years with a flexible strategy that includes developing innovative new products, partnering, and acquiring companies or technologies to complement our portfolio.

QIAGEN will continue to leverage its global leadership in Sample & Assay Technologies to expand in all customer groups. Our strategies for the future are guided by the QIAGEN vision of making improvements in life possible through the use of our innovative products in a growing number of applications.

QIAGEN Perspectives for 2012

QIAGEN continued to make good progress on achieving its strategic initiatives during 2011 to drive growth and innovation, as demonstrated by the stronger performance in the second half of the year despite challenging macroeconomic conditions.

QIAGEN intends to build on this momentum and accelerate full-year growth in 2012 compared to 2011, leveraging its leadership in Sample & Assay Technologies by (1) driving platform success, especially the rollout of QIAsymphony RGQ; (2) adding content to these platforms across all customer classes; (3) broadening its geographic presence in high-growth markets; and (4) growing efficiently and effectively.

QIAsymphony RGQ, the breakthrough modular platform, has started a new era of laboratory automation and workflow consolidation. This flagship instrument is expected to be a key growth driver during the next decade and support global expansion in all customer classes, particularly Molecular Diagnostics. QIAGEN achieved its year-end 2011 goal of more than 550 QIAsymphony systems installed worldwide, and has set a new goal to reach more than 750 installed systems by the end of 2012. Customer demand is very strong for QIAsymphony given its many features, including its status as the industry’s first automation system that can process both commercial assays and a broad array of laboratory-developed tests from sample to clinical result. Also in late 2011, QIAGEN introduced the novel QIAensemble DCU system, which is the first system automating the tedious process of manually handling clinical liquid sample vials.

Building on the QIAsymphony success, QIAGEN is adding high-value content for use on its automated systems, particularly novel biomarkers and companion diagnostics for use in Personalized Healthcare as well as by customers in Pharma and Academia:

• |  | Two separate U.S. regulatory submissions are under review for QIAGEN’s therascreen KRAS assay as companion diagnostics for use in combination with two medicines for treatment of patients with metastatic colorectal cancer. These submissions were completed in July and August 2011, marking the first regulatory submissions by QIAGEN for companion diagnostics in the U.S. Discussions with the FDA have been progressing well.

• |  | A further milestone in the Personalized Healthcare strategy was achieved in December 2011 with the regulatory approval of the therascreen EGFR mutation detection kit in Japan, which built on the country’s approval of the therascreen KRAS assay in April 2011. Both tests have been shown to play an important role in guiding cancer treatment decisions. Japan is one of the largest markets for companion diagnostic tests, with a combined potential patient population for EGFR and KRAS testing estimated at approximately 100,000 per year.

• |  | At the end of 2011, QIAGEN held an 89% stake in Ipsogen S.A. (Alternext:ALIPS), a French company that is a pioneer in molecular testing for leukemia and other blood cancers.

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MANAGEMENT REPORT Future Perspectives

| Ipsogen products are based on a rich intellectual property portfolio that includes 15 biomarkers such as JAK2, for which QIAGEN plans to develop a companion diagnostic in collaboration with Eli Lilly & Company. In July 2011 QIA-GEN announced its acquisition of a majority stake in Ipso-gen, and subsequently increased its holding through a public offer to acquire all remaining shares. QIAGEN intends to fully acquire Ipsogen through future public offers.

| • |  | In January 2012, QIAGEN reached agreements to acquire worldwide exclusive rights to three biomarkers expected to play important roles in personalizing treatment of various cancers. A strategic co-development partnership and licensing agreement with Insight Genetics, Inc. covers a genetic test for the ALK (anaplastic lymphoma kinase) biomarker, a promising target for a novel class of lung cancer drugs. In a separate agreement between Ipsogen and Personal Genome Diagnostics Inc., QIAGEN acquired exclusive rights to testing for mutations of the IDH1 and IDH2 genes, implicated in brain cancers, acute myelogenous leukemia (AML) and certain other malignancies. QIAGEN plans to provide these biomarker assays to researchers and to develop companion diagnostics for use with new medicines.

QIAGEN also added novel content to its portfolio through the acquisition of Cellestis Limited in August 2011, gaining access to a breakthrough “pre-molecular” technology for diagnosing diseases earlier than possible with other diagnostic methods. The QuantiFERON-TB Gold (QFT) test for latent tuberculosis (TB), which is approved and recommended in national guidelines in many developed countries (including U.S., Europe and Japan), had pro forma full-year net sales of approximately $55 million in 2011 and grew at a strong double-digit CER pace. Building on that success, QIAGEN intends to submit two tests for U.S. regulatory approval in 2012 for detection of the cytomegalovirus (CMV): the QuantiFERON-CMV test and a complementary DNA-based molecular diagnostic test.

QIAGEN is expanding its geographic presence after beginning direct sales in India and Taiwan during 2011. The top seven emerging markets (Brazil, Russia, India, China, South Korea, Mexico and Turkey) represented 12% of net sales in 2011 and generated 21% CER growth compared to 2010. Key areas under consideration for expansion are in Eastern Europe, Latin America and Asia. Ongoing strong growth in these markets is expected in 2012.

To grow more efficiently and effectively, QIAGEN launched a project in November 2011 to enhance productivity and free up resources for reallocation to strategic initiatives. Initial actions have focused on eliminating organizational layers, overlapping structures and duplication between global, regional and local activities. As part of this project, R&D activities will focus on high-growth areas in all customer classes. QIAGEN also plans to optimize capacity utilization at selected sites and capture savings from shared service functions. As a result of these reallocations and efficiency programs, the number of positions in QIAGEN’s worldwide work-force is being reduced by approximately 8–10%, with the vast majority of actions completed by the end of January 2012. Annual pre-tax cost savings of approximately $50 million are expected to be created in 2012, with the majority to be reinvested. A pre-tax restructuring charge of approximately $75 million was taken in the fourth quarter of 2011, of which approximately 40% was cash-related. QIAGEN plans to take a restructuring charge in 2012 for additional restructuring measures related to this program.

QIAGEN has set a goal to accelerate growth in 2012, building on the progress on strategic initiatives during 2011. For the full year, total net sales are expected to rise on a mix of organic growth and contributions from the Cellestis and Ipsogen acquisitions in 2011. Stable cash flows and a strong balance sheet will enable QIAGEN to build its business through internal investments in new products and geographic expansion as well as through targeted acquisitions.

Global Economic Perspectives for 2012

The near-term economic outlook is mixed. In the United States, improving conditions in employment, retail sales and the housing market suggest that growth continued in early 2012 and may be accelerating. Uncertainties include the impact of rising energy prices, slowdowns in Europe and other parts of the world, and potential political developments in the U.S. and abroad. In Europe, negative economic reports in early 2012 pointed toward a potential recession, although infusions of liquidity through monetary policy and negotiated settlements of sovereign debt for Greece seemed to stabilize the situation. Still, austerity policies targeting excessive sovereign debt in Europe and the U.S. present a potential risk to economic recovery. In addition, a slowdown in the growth of China and other emerging markets, together with the potential slowdown in Europe, could have negative impacts across all developed economies.

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Industry Perspectives for 2012

Customer classes served by QIAGEN present opportunities, and also uncertainties, for 2012 and beyond. In Molecular Diagnostics, demand continues to grow in 2012 based on the superiority of molecular testing in identifying and profiling many diseases. Companion diagnostics, using genetic bio-markers to personalize care by predicting the usefulness of treatments, are disseminating rapidly. U.S. regulatory approvals of new companion diagnostics are expected in 2012. On the other hand, pressure to control costs in healthcare is intensifying worldwide because of fiscal austerity efforts and the demands of aging populations. Political uncertainties in 2012 could affect the implementation of U.S. healthcare reform, which currently is set to impose a 2.3% surtax on medical devices (including assays and instruments) starting in 2013 and to greatly expand the number of U.S. residents with health benefits starting in 2014. In Applied Testing, two developments from 2011 – the European harmonization of standards for forensic laboratories and an increasing emphasis on food safety after crises in the U.S. and Europe – will create ongoing opportunities in 2012 for QIAGEN technologies. Research in Academia will likely face budget restrictions in 2012 from economic weakness and government austerity initiatives in certain areas of Europe as well as the United States and other markets. The Pharma industry has begun 2012 with additional announcements of cutbacks, although the industry’s need to improve effectiveness in developing new drugs is stronger than ever and supportive of demand for our products. In summary, QIAGEN intends to pursue growth opportunities across all of its customer classes.

Subsequent Events

There were no events requiring disclosure.

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GOVERNANCE REPORT

Corporate Structure |  |  | 113 |
Managing Board |  |  | 113 |
Supervisory Board |  |  | 115 |
Share Ownership |  |  | 120 |
Additional Information |  |  | 121 |

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GOVERNANCE REPORT Corporate Structure | Managing Board

GOVERNANCE REPORT

QIAGEN recognizes the importance of clear and straightforward rules on corporate governance and, where appropriate, has adapted its internal organization and processes to these rules.

This section provides an overview of QIAGEN’s corporate governance structure and includes details of the information required under the Dutch Corporate Governance Code (the “Code”). The Code is applicable to QIAGEN N.V. (in the following also referred to as the “Company”), as it is a publicly listed company incorporated under the laws of the Netherlands with a registered seat in Venlo, the Netherlands. The Code contains the principles and concrete provisions which the persons involved in a listed company (including Managing Board members and Supervisory Board members) and stakeholders should observe in relation to one another.

Corporate Structure

QIAGEN is a public company with limited liability (naamloze vennootschap) incorporated under Dutch law similar to a “Corporation” (Inc.) in the United States. QIAGEN has a two-tiered board structure. QIAGEN is managed by a Managing Board, which is supervised and advised by a Supervisory Board. It is in the interest of QIAGEN and all its stakeholders that each Board performs its functions appropriately and that there is a clear division of responsibilities between the Managing Board, the Supervisory Board, the general meeting of shareholders (“General Meeting”) and the external auditor in a well-functioning system of checks and balances.

Managing Board

General

The Managing Board is responsible for the management and the general affairs of QIAGEN as well as defining and achieving QIAGEN’s aims, strategy, policies and results. The Managing Board is also responsible for complying with all relevant legislation and regulations as well as for managing the risks associated with the business activities and the financing of QIAGEN. It reports related developments to and discusses the internal risk management and control systems with the Supervisory Board and the Audit Committee. The Managing Board is accountable for the performance of its duties to the Supervisory Board and the General Meeting. The Managing Board provides the Supervisory Board with timely information necessary for the exercise of the duties of the Supervisory Board. In discharging its duties, the Managing Board takes into account the interests of QIAGEN, its enterprises and all parties involved in QIAGEN, including shareholders and other stakeholders.

Composition and appointment

QIAGEN has also established an Executive Committee, of which four members currently serve as Managing Directors of QIAGEN.

As of December 31, 2011, our Managing Board consisted of the following individuals:

Name |  | Age* |  |  |
Peer M. Schatz |  |  |  |  |  |
Managing Director, Chief Executive Officer |  |  | 46 |  |  |
Roland Sackers |  |  |  |  |  |
Managing Director, Chief Financial Officer |  |  | 43 |  |  |
Dr. Joachim Schorr |  |  |  |  |  |
Managing Director, Senior Vice President, Research and Development |  |  | 51 |  |  |
Bernd Uder |  |  |  |  |  |
Managing Director, Senior Vice President, Global Sales |  |  | 54 |  |  |

* | As of December 31, 2011

The Managing Board consists of one or more members as determined by the Supervisory Board. The members of the Managing Board are appointed by the General Meeting upon the joint meeting of the Supervisory Board and the Managing Board (the “Joint Meeting”) having made a binding nomination for each vacancy. However, the General Meeting may at all times overrule the binding nature of such a nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half the issued share capital. Managing Directors are appointed annually for the period beginning on the date following the Annual General Meeting up to and including the date of the Annual General Meeting held in the following year.

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Members of the Managing Board may be suspended and dismissed by the General Meeting by a resolution adopted by a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital, unless the proposal was made by the Joint Meeting, in which case a simple majority of votes cast is sufficient. Furthermore, the Supervisory Board may at any time suspend (but not dismiss) a member of the Managing Board.

Conflicts of interest

Resolutions to enter into transactions under which members of the Managing Board could have a conflict of interest with QIAGEN, and which are of material significance to QIAGEN and/or the relevant member of the Managing Board, require the approval of the Supervisory Board. QIAGEN has not entered into any such transactions in 2011.

Remuneration

The remuneration granted to the members of the Managing Board in 2011 consisted of a fixed salary and other variable components, with the significant majority of remuneration awarded in the form of QIAGEN equity.

Variable compensation included annual payments linked to business performance (bonuses), as well as long-term equity incentives that were awarded based on individual performance. Stock options granted to the Managing Board members must have an exercise price that is higher than the market price at the time of grant. Restricted Share Units granted to the Managing Board members, vest over a 10-year period. Some of these grants contain vesting hurdles related to the achievement of specific operational and financial goals that are not disclosed due to confidential reasons. The long-term vesting periods are designed to strengthen the Managing Board members’ commitment to QIAGEN and achieving its strategic initiatives, which in turn would benefit shareholders and other stakeholders.

The tables below state the amounts earned on an accrual basis by our Managing Board members in 2011.

Year ended December 31, 2011

|  | Annual Compensation ($) |
Name |  | Fixed Salary |  |  | Variable Cash Bonus |  |  | Other1 |  |  | Total |
Managing Board: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Peer M. Schatz |  |  | 1,305,000 |  |  |  | 539,000 |  |  |  | 1,000 |  |  |  | 1,845,000 |
Roland Sackers |  |  | 576,000 |  |  |  | 194,000 |  |  |  | 26,000 |  |  |  | 796,000 |
Dr. Joachim Schorr |  |  | 366,000 |  |  |  | 138,000 |  |  |  | 38,000 |  |  |  | 542,000 |
Bernd Uder |  |  | 370,000 |  |  |  | 141,000 |  |  |  | 15,000 |  |  |  | 526,000 |

1 | Amounts include, among others, inventor bonus and relocation costs. We also occasionally reimburse our Managing Directors’ personal expenses related to attending out-of-town meetings but not directly related to their attendance. The value of such reimbursed personal expenses is reported above as “other.” Amounts do not include the reimbursement of certain expenses relating to travel incurred at the request of QIAGEN, other reimbursements or payments that in total did not exceed $10,000 or tax amounts paid by QIAGEN to tax authorities in order to avoid double-taxation under multi-tax jurisdiction employment agreements.

Year ended December 31, 2011

|  | Long-Term Compensation |
Name |  | Defined Contribution Beneit Plan |  |  | Stock Options |  |  | Restricted Stock Units |
Managing Board: |  |  |  |  |  |  |  |  |  |  |  |
Peer M. Schatz |  | $ | 91,000 |  |  |  | 112,653 |  |  |  | 388,427 |
Roland Sackers |  | $ | 93,000 |  |  |  | 37,815 |  |  |  | 130,385 |
Dr. Joachim Schorr |  | $ | 35,000 |  |  |  | 17,231 |  |  |  | 29,705 |
Bernd Uder |  | $ | 57,000 |  |  |  | 16,652 |  |  |  | 28,708 |

Further details on the composition of remuneration for the Managing Board, and the implementation of the Remuneration Policy during 2011, are disclosed in the Remuneration Report of the Compensation Committee as published on our website at www.qiagen.com.

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GOVERNANCE REPORT Supervisory Board

Supervisory Board

General

The Supervisory Board supervises the policies of the Managing Board, the general course of QIAGEN’s affairs and strategy and the business enterprises we operate. The Supervisory Board assists the Managing Board by providing advice relating to the business activities of QIAGEN. In 2011, the Supervisory Board had nine regular meetings that were held with the attendance of the Managing Board, while certain agenda items were discussed exclusively between the Supervisory Board members. In discharging its duties, the Supervisory Board takes into account the interests of QIAGEN, its enterprise and all parties involved in QIAGEN, including shareholders as well as other stakeholders. The Supervisory Board is responsible for the quality of its own performance. In this respect, the Supervisory Board conducts a self-evaluation on an annual basis.

Composition and appointment

The Supervisory Board consists of at least three members, or a larger number as determined by the Joint Meeting. Members of the Supervisory Board are appointed by the General Meeting upon the Joint Meeting having made a binding nomination for each vacancy. However, the General Meeting may at all times overrule the binding nature of such a nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half the issued share capital.

The Supervisory Board shall be composed in a way that enables it to carry out its duties properly and enables its members to act critically and independently of one another and of the Managing Board and any particular interests. To that effect, the Supervisory Board has adopted a profile of its size and composition that takes into account the nature of our business, our activities and the desired expertise and background of the members of the Supervisory Board. The current profile of the Supervisory Board can be found on our web-site. The Supervisory Board has appointed a chairman from its members who has the duties assigned to him by the Articles of Association and the Code.

Members of the Supervisory Board are appointed for one-year terms for the period beginning on the day after the Annual General Meeting up to and including the day of the Annual General Meeting held in the following year. Members of the Supervisory Board may be suspended and dismissed by the General Meeting by a resolution adopted by a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital, unless the proposal was made by the Joint Meeting, in which case a simple majority of votes cast is sufficient.

The Supervisory Board currently consists of the following members:

Name |  | Age* |  |  |
Prof. Dr. Detlev H. Riesner |  |  |  |  |  |
Chairman of the Supervisory Board, Supervisory Director and |  |  |  |  |  |
Chairman of the Selection and Appointment Committee |  |  | 70 |  |  |
Dr. Werner Brandt |  |  |  |  |  |
Supervisory Director and Chairman of the Audit Committee |  |  | 58 |  |  |
Dr. Metin Colpan |  |  |  |  |  |
Supervisory Director |  |  | 56 |  |  |
Erik Hornnaess |  |  |  |  |  |
Deputy Chairman of the Supervisory Board, Supervisory Director, |  |  |  |  |  |
Chairman of the Compensation Committee, Member of the Audit |  |  |  |  |  |
Committee and Member of the Selection and Appointment Committee |  |  | 74 |  |  |
Prof. Dr. Manfred Karobath |  |  |  |  |  |
Supervisory Director and Member of the Compensation Committee |  |  | 70 |  |  |
Heino von Prondzynski |  |  |  |  |  |
Supervisory Director |  |  | 62 |  |  |
Elizabeth E. Tallett |  |  |  |  |  |
Supervisory Director and Member of the Audit Committee and Member of the Compensation Committee |  |  | 62 |  |  |

* | As of December 31, 2011

The Supervisory Director Dr. Vera Kallmeyer passed away in October 2011.

The following is a brief summary of the background of each of the Supervisory Directors. References to “QIAGEN” in relation to periods prior to April 29, 1996, refer to QIAGEN GmbH and its consolidated subsidiaries:

Professor Dr. Detlev H. Riesner, 70, is a co-founder of the Company. He has been a member of the Supervisory Board since 1996 and was appointed Chairman of the Supervisory Board in 1999, and in 2005, he was also appointed Chairman of the Selection and Appointment Committee. Professor Riesner has held the Chair of Biophysics at the Heinrich-Heine-University in Duesseldorf since 1980 and retired in 2006. He has held the position of Dean of the Science

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Faculty (1991 – 92), Vice President of the University (Research) (1996 – 99) and Director of Technology (1999 – 2006). In 2007, he became a member of the University’s board of trustees. Prior to that, he was Professor of Biophysical Chemistry at the Darmstadt Institute of Technology and, from 1975 to 1977, Lecturer of Biophysical Chemistry at Hannover Medical School. He has held guest professorships at the Institute of Microbiology, Academia Sinica, Beijing, and the Department of Neurology at the University of California, San Francisco. He received his M.S. in Physics from Hannover Institute of Technology and his Ph.D. from the University of Braunschweig, with post-graduate work at Princeton University. Professor Riesner is either a member of the Supervisory Board or a director of AC Immune S.A., Lausanne; Algiax Pharmaceuticals GmbH (former Spinal Cord Therapeutics), Erkrath; Evocatal GmbH, Duesseldorf; DRK Blutspendedienst West gGmbH, Hagen; and DIWA GmbH, Duesseldorf. His memberships in the advisory boards of NewLab Bioquality AG and Direvo AG ended when the companies were sold in 2006. Professor Riesner is also a member of the scientific advisory boards of PrioNet, Canada, and the Alberta Prion Research Institute, Canada.

Dr. Werner Brandt, 58, joined the Company’s Supervisory Board in 2007. In the same year, he was appointed Chairman of the Audit Committee. Dr. Brandt has been a member of the Executive Board and the Chief Financial Officer of SAP AG since 2001. From 1999 to 2001, he was a member of the Executive Board and Chief Financial Officer of the German-American healthcare company, Fresenius Medical Care AG, where he also served as Labor Relations Director. From 1992 to 1999, Dr. Brandt was a member of the Managing Board of Baxter Deutschland GmbH and Vice President for European Operations. In this capacity, he was responsible for Baxter’s financial operations in Europe. Dr. Brandt began his career in 1981 at the former Price Water-house GmbH (now PricewaterhouseCoopers) in Frankfurt. Dr. Brandt completed his Doctorate in business administration from the Technical University of Darmstadt, Germany, in 1991, after studying business administration at the University of Nuremberg-Erlangen, Germany, from 1976 to 1981. Dr. Brandt is currently a member of the Supervisory Board of Deutsche Lufthansa AG.

Dr. Metin Colpan, 56, is a co-founder of the Company and was Chief Executive Officer and a Managing Director from 1985 through 2003. Dr. Colpan has been a member of the Supervisory Board since 2004. Dr. Colpan obtained his Ph.D. and M.S. in Organic Chemistry and Chemical Engineering from the Darmstadt Institute of Technology in 1983. Prior to founding QIAGEN, Dr. Colpan was an Assistant Investigator at the Institute for Biophysics at the University of Duesseldorf. Dr. Colpan has had wide experience in separation techniques, and in the separation and purification of nucleic acids in particular, and has filed many patents in the field. Dr. Colpan currently serves as a Supervisory Board member of Morphosys AG, Munich, Germany; and Qalovis Farmer Automatic Energy GmbH, Laer, Germany. Dr. Colpan previously served as Supervisory Board member of Ingenium Pharmaceuticals AG, GenPat77 Pharmacogenetics AG and GPC Biotech AG, each in Munich, Germany.

Erik Hornnaess, 74, has been a member of the Supervisory Board since 1998. He joined the Audit Committee in 2002, the Compensation Committee in 2005 and the Selection and Appointment Committee in 2007. He was appointed Deputy Chairman of the Supervisory Board in 2007. Mr. Hornnaess worked for Astra Pharmaceuticals, Sweden, from 1965 until 1979 in various management positions in Sweden, Australia, and Canada and, for the last three years of this period, as the General Manager for the Benelux region (Belgium, The Netherlands and Luxembourg). In 1979, he joined Abbott Laboratories European Headquarters in Paris, France, and from 1982, he was the Area Vice-President of Abbott Diagnostic Division in Europe, Middle-East and Africa, with headquarters in Wiesbaden, Germany. Mr. Hornnaess retired from Abbott Laboratories on March 1, 1997. Additionally, Mr. Hornnaess served as the Vice-President of European Diagnostic Manufacturers Association (EDMA), Brussels, in the period 1995 through 1997. Mr. Hornnaess graduated from Aarhus Handelshojskole, Denmark, with an M.B.A. and obtained a P.M.D. from the Harvard Business School.

Professor Dr. Manfred Karobath, 70, has been a member of the Supervisory Board since 2000 and joined the Compensation Committee in 2005. Prof. Dr. Karobath studied medicine, and from 1967 to 1980, he worked first in the Department of Biochemistry of the University of Vienna and, after a stage as postdoctoral fellow, he joined the Department of Psychiatry where he became Professor of Biological Psychiatry. In 1980, he joined Sandoz Pharma in Basel, first in drug discovery, and later he became Senior Vice President and head of R & D. In 1992, Prof. Dr. Karobath joined Rhone Poulenc Rorer (“RPR”) as President of R&D and Executive Vice President, and later, he became a member of the boards of directors of RPR, Pasteur Mérieux Connaught, Centeon and Rhone Poulenc Pharma. He has received several scientific awards and has published 92 scientific papers.

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GOVERNANCE REPORT Supervisory Board

Heino von Prondzynski, 62, joined the Supervisory Board as well as the Audit Committee in 2007. Mr. von Prondzynski retired in 2005 from Roche where he served as Chief Executive Officer of Roche Diagnostics and a member of the Executive Committee of the Roche Group. Prior to joining Roche in 2000, Mr. von Prondzynski worked at Chiron, first as General Manager and Chief Executive Officer in Germany and Italy, later as President of the Vaccines Division in Emeryville, USA. Mr. von Prondzynski started his career with Bayer in Germany as a sales representative and later worked in Austria and Brazil as General Manager. He studied mathematics, geography and history at Westfälische Wilhelms University of Münster in Germany. Mr. von Prondzynski is a director of Koninklijke Philips Electronics NV, and Hospira, Inc., and HTL Strefa. Mr. von Prondzynski was previously a director of Epigenomics AG and Chairman of Nobel Biocare Holding AG.

Elizabeth E. Tallett, 62, has been a Principal of Hunter Partners, LLC, a management company for early to midstage pharmaceutical, biotechnology and medical device companies, since 2002. Her senior management experience includes President and CEO of Transcell Technologies Inc., President of Centocor Pharmaceuticals, member of the ParkeDavis Executive Committee, and Director of Worldwide Strategic Planning for Warner-Lambert Company. Ms. Tallett graduated from Nottingham University, England, with dual Bachelor’s degrees with honors in mathematics and economics. She is a member of the board of directors of Principal Financial Group, Inc., Coventry Health Care, Inc., Meredith Corp., and IntegraMed America, Inc. Ms. Tallett is currently the Lead Director for both Principal and Coventry Health Care. She was also a director of Varian, Inc., Immunicon, Inc. and Varian Semiconductor Equipment Associates, Inc. at times during the past five years. Ms. Tallett was a founding board member of the Biotechnology Council of New Jersey and is a Trustee of Solebury School in Pennsylvania.

Conflicts of Interest

Resolutions to enter into transactions under which members of the Supervisory Board could have a confiict of interest with QIAGEN, and which are of material significance to QIAGEN and/or the relevant member of the Supervisory Board, require the approval of the Supervisory Board plenum. In 2011, neither QIAGEN nor its Supervisory Board members have entered into any such transactions.

Committees

The Supervisory Board has established an Audit Committee, a Compensation Committee and a Selection and Appointment (Nomination) Committee from among its members and can establish other committees as deemed beneficial. The Supervisory Board has approved charters under which each of the committees operates. These charters are published on our website (www.qiagen.com).

Audit Committee

The Audit Committee’s primary duties and responsibilities include, among other things, to serve as an independent and objective party to monitor QIAGEN’s accounting and finan-cial reporting process and internal risk management, control and compliance systems. The Audit Committee also is directly responsible for proposing the external auditor to the Supervisory Board, which then proposes the appointment of the external auditor to the General Meeting. Further, the Audit Committee is responsible for the compensation and oversight of QIAGEN’s external auditor and for providing an open avenue of communication among the external auditor as well as the Management Board and the Supervisory Board. Our Internal Audit department operates under the direct responsibility of the Audit Committee. The Audit Committee currently consists of three members: Dr. Brandt (Chairman), Ms. Tallett, and Mr. Hornnaess. The Audit Committee members are appointed by the Supervisory Board and serve for a term of one year. The Supervisory Board has designated Dr. Brandt as a “financial expert” as defined in provisions III.3.2 and III.5.7 of the Code.

The Audit Committee met six times in 2011 and did meet with the external auditor excluding members of the Managing Board in January 2012. Among other things, the Audit Committee discussed the selection of the external auditor to audit the consolidated financial statements and accounting and records of QIAGEN and its subsidiaries, along with the preapproval of fees for these services. Further, it reviewed QIAGEN’s compliance with various laws and policies, including the Code of Conduct; reviewed the risk management system; discussed the performance of the external auditor with management; and discussed on a quarterly basis the scope and results of the reviews and audits with the external auditor. The Audit Committee also discussed finan-cial accounting and reporting principles and policies as well

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as the adequacy of internal accounting, financial and operating controls and procedures with the external auditor and management. These discussions included a review of developments in accounting standards and their impact on QIAGEN’s financial statements. The Audit Committee considered and approved recommendations regarding changes to QIAGEN’s accounting policies and processes. In addition, the Audit Committee reviewed with management and the external auditor all quarterly reports prior to their public release as well as quarterly and annual reports prepared under U.S. GAAP (reported on Forms 6-K and 20-F) for filing with the U.S. Securities and Exchange Commission and the annual report prepared under IFRS. The Audit Committee performs a self-evaluation of its activities on an annual basis.

Compensation Committee

The Compensation Committee’s primary duties and responsibilities include, among other things, the preparation of a proposal for the Supervisory Board concerning the Remuneration Policy for the Managing Board to be adopted by the General Meeting, the preparation of a proposal concerning the individual compensation of Managing Board members to be adopted by the Supervisory Board and the preparation of the Remuneration Report on compensation policies for the Managing Board to be adopted by the Supervisory Board. The Remuneration Report reviews the implementation of the Remuneration Policy in the most recent year and provides an outline of the Remuneration Policy for the future.

The Compensation Committee currently consists of three members: Mr. Hornnaess (Chairman), Ms. Tallett and Prof. Dr. Karobath. Members are appointed by the Supervisory Board and serve for a term of one year. The Compensation Committee met 12 times in 2011. It reviewed, approved and made recommendations on QIAGEN’s compensation and benefits policies, practices and procedures to ensure that legal and fiduciary responsibilities of the Supervisory Board and the Managing Board are carried out. Further, the Compensation Committee approved equity-based remuneration systems and their application, including stock rights or stock option grants on a monthly basis.

Selection and Appointment Committee

The Selection and Appointment (Nomination) Committee is primarily responsible for the preparation of selection criteria and appointment procedures for members of the Supervisory Board and Managing Board as well as the periodic evaluation of the scope and composition of the Managing Board and the Supervisory Board, including the profile of the Supervisory Board.

Additionally, the Selection and Appointment Committee periodically evaluates the functioning of individual members of the Managing Board and Supervisory Board, reporting these results to our Supervisory Board. It also proposes the (re-)¬appointments of members of our Managing Board and Supervisory Board and supervises the policy of our Managing Board in relation to selection and appointment criteria for senior management. The Selection and Appointment Committee prepares and submits to our Supervisory Board an annual report of its deliberations and findings.

Current members of the Selection and Appointment Committee are Prof. Dr. Riesner (Chairman) and Mr. Hornnaess. Members are appointed by the Supervisory Board and serve for a one-year term. The Selection and Appointment Committee convened three times in 2011.

Remuneration

Compensation for the Supervisory Board in 2011 consisted of a fixed retainer compensation, additional retainer amounts for Chairman and Vice Chairman, and committee membership fees. Annual remuneration of the Supervisory Board members is as follows:

Fee paid to each member of the Supervisory Board |  | € | 30,000 |
Additional compensation payable to members holding the following positions: |  |  |  |
Chairman of the Supervisory Board |  | € | 20,000 |
Vice Chairman of the Supervisory Board |  | € | 5,000 |
Chairman of the Audit Committee |  | € | 15,000 |
Chairman of the Compensation Committee |  | € | 10,000 |
Fee payable to each member of the Audit Committee |  | € | 7,500 |
Fee payable to each member of the Compensation Committee |  | € | 5,000 |

Members of the Supervisory Board also receive €1,000 for attending the Annual General Meeting and €1,000 for attending each meeting of the Supervisory Board.

Members of the Supervisory Board receive €1,000 for attending each meeting of any subcommittees (other than the Audit Committee, Compensation Committee and Selection and Appointment Committee).

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GOVERNANCE REPORT Supervisory Board

Supervisory Board members also receive variable compensation, which is determined annually by the Compensation Committee pursuant to a formula based on growth of Adjusted Earnings per Share provided that such remuneration will not exceed €5,000 per year.

($) Name |  | Fixed Remuneration |  |  | Chairman / Vice Chairman Committee |  |  | Committee Membership |  |  | Meeting Attendance |  |  | Subcommittee Meeting Attendance |  |  | Variable Cash Remuneration |  |  | Total |
Supervisory Board: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prof. Dr. Detlev H. Riesner |  |  | 42,000 |  |  |  | 28,000 |  |  |  | — |  |  |  | 8,400 |  |  |  | 4,200 |  |  |  | 7,000 |  |  |  | 89,600 |
Dr. Werner Brandt |  |  | 42,000 |  |  |  | 21,000 |  |  |  | — |  |  |  | 7,000 |  |  |  | — |  |  |  | 7,000 |  |  |  | 77,000 |
Dr. Metin Colpan |  |  | 42,000 |  |  |  | — |  |  |  | — |  |  |  | 7,000 |  |  |  | 4,200 |  |  |  | 7,000 |  |  |  | 60,200 |
Erik Hornnaess |  |  | 42,000 |  |  |  | 21,000 |  |  |  | 10,500 |  |  |  | 7,000 |  |  |  | — |  |  |  | 7,000 |  |  |  | 87,500 |
Prof. Dr. Manfred Karobath |  |  | 42,000 |  |  |  | — |  |  |  | 7,000 |  |  |  | 7,000 |  |  |  | 4,200 |  |  |  | 7,000 |  |  |  | 67,200 |
Heino von Prondzynski |  |  | 42,000 |  |  |  | — |  |  |  | 6,125 |  |  |  | 5,600 |  |  |  | 4,200 |  |  |  | 7,000 |  |  |  | 64,925 |
Elizabeth E. Tallett |  |  | 21,000 |  |  |  | — |  |  |  | 5,250 |  |  |  | 4,200 |  |  |  | — |  |  |  | 3,500 |  |  |  | 33,950 |
Dr. Vera Kallmeyer 1 |  |  | 14,000 |  |  |  | — |  |  |  | 3,500 |  |  |  | 2,800 |  |  |  | 1,400 |  |  |  | 2,300 |  |  |  | 24,000 |

1 | Dr. Vera Kallmeyer was a member of our Supervisory Board from June 2011 until her passing in October 2011.

Supervisory Board members also receive a variable component, in the form of share-based compensation. Stock options granted to the Supervisory Board members must have an exercise price that is higher than the market price at the time of grant. During 2011, the following options or other share-based compensation were granted to the members of the Supervisory Board.

Year ended December 31, 2011

|  | Grants |
Name |  | Stock Options |  |  | Restricted Stock Units |
Supervisory Board: |  |  |  |  |  |  |  |
Prof. Dr. Detlev H. Riesner |  |  | 1,355 |  |  |  | 4,671 |
Dr. Werner Brandt |  |  | 1,355 |  |  |  | 4,671 |
Dr. Metin Colpan |  |  | 1,355 |  |  |  | 4,671 |
Erik Hornnaess |  |  | 1,355 |  |  |  | 4,671 |
Prof. Dr. Manfred Karobath |  |  | 1,355 |  |  |  | 4,671 |
Heino von Prondzynski |  |  | 1,355 |  |  |  | 4,671 |

In 2004, QIAGEN entered into a consulting agreement with Dr. Metin Colpan, our former Chief Executive Officer and current Supervisory Board member, pursuant to which Dr. Colpan is paid a fee of €2,750 per day for scientific consulting services, subject to adjustment. During 2011, QIAGEN paid approximately $100,000 to Dr. Colpan for scientific consulting services including travel reimbursements under this agreement. No agency or advisory service fees were paid to other members of the Supervisory Board. The agreement with Dr. Colpan was terminated in January 2012.

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Share Ownership

The following table sets forth certain information as of January 27, 2012, concerning the ownership of common shares by our directors and officers. In preparing the following table, we have relied on information furnished by these individuals.

Name and country of residence |  | Shares Beneficially Owned 1 |  |  | Percent Ownership2 |
Peer M. Schatz, Germany |  |  | 1,606,189 | 3 |  |  | 0.69 | %
Roland Sackers, Germany |  |  | 24,852 | 4 |  |  | * |
Dr. Joachim Schorr, Germany |  |  | — | 5 |  |  | * |
Bernd Uder, Germany |  |  | — | 6 |  |  | * |
Prof. Dr. Detlev H. Riesner, Germany |  |  | 1,752,735 | 7 |  |  | 0.75 | %
Dr. Werner Brandt, Germany |  |  | 6,882 | 8 |  |  | * |
Dr. Metin Colpan, Germany |  |  | 4,538,703 | 9 |  |  | 1.94 | %
Erik Hornnaess, Spain |  |  | 11,922 | 10 |  |  | * |
Professor Dr. Manfred Karobath, Austria |  |  | 2,257 | 11 |  |  | * |
Heino von Prondzynski, Switzerland |  |  | 882 | 12 |  |  | * |
Elizabeth E. Tallett, USA |  |  | — |  |  |  | * |

* | Indicates that the person beneficially owns less than 0.5% of the Common Shares issued and outstanding as of January 27, 2012.

1 | The number of Common Shares issued and outstanding as of January 27, 2012 was 234,260,408. The persons and entities named in the table have sole voting and investment power with respect to all shares shown as beneficially owned by them and have the same voting rights as shareholders with respect to Common Shares.

2 | Does not include Common Shares subject to options or awards held by such persons at January 27, 2012. See footnotes below for information regarding options now exercisable or that could become exercisable within 60 days of the date of this table.

3 | Does not include 2,226,064 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $4.590 to $22.430 per share. Options expire in increments during the period between 9/2012 and 2/2021. Does not include 316,627 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

4 | Does not include 99,363 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $16.340 to $22.430 per share. Options expire in increments during the period between 2/2018 and 2/2021.

5 | Does not include 70,342 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $16.34 to $22.430 per share. Options expire in increments during the period between 2/2017 and 2/2021. Does not include 48,221 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

6 | Does not include 62,202 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $16.340 to $22.430 per share. Options expire in increments during the period between 2/2017 and 2/2021. Does not include 47,354 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

7 | Does not include 53,485 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $6.018 to $22.430 per share. Options expire in increments during the period between 4/2013 and 2/2021. Includes 1,752,068 shares held by Riesner Verwaltungs GmbH, of which Professor Riesner is the sole stockholder. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

8 | Does not include 4,876 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $16.340 to $22.430 per share. Options expire in increments during the period between 4/2018 and 2/2021. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

9 | Does not include 646,818 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $6.018 to $22.430 per share. Options expire in increments during the period between 4/2012 and 2/2021. Includes 3,738,703 shares held by CC Verwaltungs GmbH, of which Dr. Colpan is the sole stockholder and 800,000 shares held by Colpan GbR. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

10 | Does not include 66,818 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $6.018 to $22.430 per share. Options expire in increments during the period between 4/2013 and 2/2021. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

11 | Does not include 60,818 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $6.018 to $22.430 per share. Options expire in increments during the period between 4/2013 and 2/2021. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

12 | Does not include 4,876 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from $16.340 to $22.430 per share. Options expire in increments during the period between 4/2018 and 2/2021. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

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GOVERNANCE REPORT Share Ownership | Additional Information

The following table sets forth the vested and unvested options and stock awards of our officers and directors as of January 27, 2012:

Name |  | Total Vested Options |  |  | Total Unvested Options |  |  | Expiration Dates |  | Exercise Price |  | Total Unvested Stock Awards |
Peer M. Schatz |  |  | 2,107,371 |  |  |  | 234,096 |  |  | 9/30/2012 to 2/28/2021 |  | $4.59 to $22.43 |  |  | 1,467,856 |
Roland Sackers |  |  | 60,198 |  |  |  | 77,563 |  |  | 2/28/2018 to 2/28/2021 |  | $16.34 to $22.43 |  |  | 374,294 |
Dr. Joachim Schorr |  |  | 52,015 |  |  |  | 36,038 |  |  | 2/28/2017 to 2/28/2021 |  | $16.34 to $22.43 |  |  | 193,683 |
Bernd Uder |  |  | 47,599 |  |  |  | 28,703 |  |  | 2/28/2017 to 2/28/2021 |  | $16.34 to $22.43 |  |  | 193,099 |
Prof. Dr. Detlev H. Riesner |  |  | 51,838 |  |  |  | 3,101 |  |  | 4/1/2013 to 2/28/2021 |  | $ 6.02 to $22.43 |  |  | 19,785 |
Dr. Werner Brandt |  |  | 3,229 |  |  |  | 3,101 |  |  | 4/29/2018 to 2/28/2021 |  | $16.34 to $22.43 |  |  | 16,553 |
Dr. Metin Colpan |  |  | 645,171 |  |  |  | 3,101 |  |  | 4/1/2012 to 2/28/2021 |  | $6.02 to $22.43 |  |  | 19,785 |
Erik Hornnaess |  |  | 65,171 |  |  |  | 3,101 |  |  | 4/1/2013 to 2/28/2021 |  | $6.02 to $22.43 |  |  | 19,785 |
Prof. Dr. Manfred Karobath |  |  | 59,171 |  |  |  | 3,101 |  |  | 4/1/2013 to 2/28/2021 |  | $6.02 to $22.43 |  |  | 19,785 |
Heino von Prondzynski |  |  | 3,229 |  |  |  | 3,101 |  |  | 4/29/2018 to 2/28/2021 |  | $16.34 to $22.43 |  |  | 16,553 |

Additional Information

Shareholders

Our shareholders exercise their voting rights through Annual and Extraordinary General Meetings. Resolutions of the General Meeting are adopted by an absolute majority of votes cast, unless a different majority of votes or quorum is required by Dutch law or the Articles of Association. Each common share confers the right to cast one vote.

Furthermore, the Managing Board, or where appropriate, the Supervisory Board, shall provide all shareholders and other parties in the financial markets with equal and simultaneous information about matters that may influence QIAGEN’s share price.

QIAGEN is required to convene an Annual General Meeting in the Netherlands no later than six months following the end of each year. The agenda for the Annual General Meeting must contain certain matters as specified in QIAGEN’s Articles of Association and under Dutch law, including, among other things, the adoption of QIAGEN’s annual financial statements.

Additional Extraordinary General Meetings may be convened at any time by the Managing Board, the Supervisory Board or by one or more shareholders jointly representing at least 40% of QIAGEN’s issued share capital. Furthermore, one or more shareholders, who jointly represent at least 10% of QIAGEN’s issued share capital may, on their application, be authorized by the district court judge having applications for interim relief, to convene a General Meeting. Shareholders are entitled to propose items for the agenda of the General Meeting provided that they hold at least 1% of the issued share capital or the shares they hold represent a market value of at least €50 million. Proposals for agenda items for the General Meeting must be submitted at least 60 days prior to the meeting date. The notice convening a General Meeting, accompanied by the agenda, shall be sent no later than 15 days prior to the meeting. QIAGEN informs the General Meeting by means of explanatory notes to the agenda, providing all facts and circumstances relevant to the proposed resolutions.

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The Audit of Financial Reporting

The external auditor is appointed annually by the General Meeting. The Audit Committee recommends to the Supervisory Board the external auditor to be proposed for (re)appointment by the General Meeting. In addition, the Audit Committee evaluates and, where appropriate, recommends the replacement of the external auditor. The external auditor is invited to attend the meeting of the Supervisory Board at which the financial statements shall be approved and is furthermore invited to attend the General Meeting at which the financial statements are adopted and may be questioned by the General Meeting on its statement on the fairness of our annual accounts. At the Annual General Meeting in 2011, Ernst & Young Accountants was appointed as external auditor for the Company for 2011.

Share-Based Compensation

During 2005, the QIAGEN N.V. Amended and Restated 2005 Stock Plan (the Plan) was adopted. The Plan allows for the granting of stock rights and incentive stock options, as well as non-qualified options, stock grants and stock-based awards, generally with terms of up to 10 years, subject to earlier termination in certain situations. Generally, options vest over a three-year period. The vesting and exercisability of certain stock rights will be accelerated in the event of a Change of Control, as defined in the Plan. To date, all option grants have been at the market value on the grant date or at a premium above the closing market price on the grant date. We issue new Common Shares to satisfy option exercises and had approximately 22.1 million Common Shares reserved and available for issuance under this plan at December 31, 2011.

In connection with the 2007 acquisition of Digene Corporation, we assumed three additional equity incentive plans. No new grants will be made under these plans. We had approximately 0.1 million common shares reserved and available for issuance under these plans at December 31, 2011.

Stock Options

During the years ended December 31, 2011 and 2010, we granted 601,897 and 570,282 stock options, respectively. A summary of the status of employee stock options as of December 31, 2011, and changes during the year then ended is presented below:

All employee options |  | Number of Shares (in thousand) |  |  | Weighted Average Exercise Price |  |  | Weighted Average Contractual Term |  |  | Aggregate Intrinsic Value ($1,000) |
Outstanding at January 1, 2011 |  |  | 7,332 |  |  | $ | 13.86 |  |  |  |  |  |  |  |  |
Granted |  |  | 602 |  |  | $ | 19.86 |  |  |  |  |  |  |  |  |
Exercised |  |  | (655 | ) |  | $ | 12.95 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (62 | ) |  | $ | 19.56 |  |  |  |  |  |  |  |  |
Expired |  |  | (690 | ) |  | $ | 21.79 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 6,527 |  |  | $ | 13.61 |  |  |  | 3.65 |  |  | $ | 15,315 |
Exercisable at December 31, 2011 |  |  | 5,453 |  |  | $ | 12.37 |  |  |  | 2.66 |  |  | $ | 15,315 |
Vested and expected to vest at December 31, 2011 |  |  | 6,436 |  |  | $ | 13.53 |  |  |  | 3.57 |  |  | $ | 15,315 |

Restricted Stock Units

Restricted stock units represent rights to receive common shares at a future date. There is no exercise price and the fair market value at the time of grant is recognized ratably over the requisite vesting period, generally 10 years.

A summary of QIAGEN’s restricted stock units as of December 31, 2011, and changes during the year is presented below:

Restricted Stock Units |  | Restricted Stock Units ($1,000) |  |  | Weighted Average Contractual Term |  |  | Aggregate Intrinsic Value ($1,000) |
Outstanding at January 1, 2011 |  |  | 4,417 |  |  |  |  |  |  |  |  |
Granted |  |  | 1,929 |  |  |  |  |  |  |  |  |
Vested |  |  | (451 | ) |  |  |  |  |  |  |  |
Forfeited |  |  | (244 | ) |  |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 5,651 |  |  |  | 2.91 |  |  |  | 78,030 |
Vested and expected to vest at December 31, 2011 |  |  | 4,597 |  |  |  | 2.78 |  |  |  | 63,488 |

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GOVERNANCE REPORT Additional Information

Risk Management

QIAGEN has identified various risk factors for our business that are reviewed in detail in the 2011 Form 20-F filed with the U.S. Securities and Exchange Commission. There may be current risks that we have not yet fully assessed or that are currently qualified as minor, but could have a material adverse impact on our performance in the future. The Managing Board has developed and implemented strategies, controls and mitigation measures to identify current and developing risks as part of our risk management system. A variety of functional experts evaluate these business risks, attempting to mitigate and manage these risks.

Risks identified by QIAGEN are subdivided into four major categories with the following key focus areas:

Functional Group |  | Risk Management Focus
Strategic risks |  | Identification and monitoring of competitive threats to the business
|  | Complexity of product portfolio
|  | Development and success of key R&D projects
|  | Dependence on key customers for single product groups
Operational risks |  | Monitoring of production risks, including contamination prevention, high-quality product assurance and existence of appropriate redundancy of operations including supplier dependence
|  | Dependence on individual production sites for certain key products
|  | Successful integration of acquisitions to achieve anticipated benefits
|  | Purchasing initiatives, price controls and changes to reimbursements
Compliance |  | Monitoring of regulatory risk, including compliance with various regulatory bodies and pending regulatory product approvals
|  | Monitoring safety in operations and environmental hazard risks
|  | Ability to defend against intellectual property infringements and maintain competitive advantage after expiration
|  | Extensive network of subsidiaries and distributors leads to increased risk of FCPA or anti-trust concerns
Financial |  | Tax compliance
|  | Fluctuation in currency exchange rates
|  | Goodwill impairment
|  | Economic risk (including healthcare funding)
|  | IT system risks

The senior executives managing these functional groups report either to the Chief Executive Officer or to a member of the Executive Committee. These executives, in connection with the Chief Financial Officer, make strategic determinations as to the proper risk management procedures to be employed based on their assessment of the risk level.

All identified risks are required to be systematically evaluated based on their likelihood of occurring and their potential impact (estimated in monetary terms). The goal is to determine risks that could significantly threaten our success. The results of the risk assessment and any updates are reported to the Audit Committee on a regular basis. At least once a year, the Supervisory Board discusses the corporate strategy and business risks as well as the results of an assessment by the Managing Board and the Audit Committee on the structure and operations of the internal risk management and control systems, including any significant changes.

In 2008, QIAGEN established a Compliance Committee under the leadership of the Chief Financial Officer in his function as Chief Compliance Officer. The Compliance Committee, which consists of senior executives from Human Resources, Internal Audit, SEC Reporting, Legal and Regulatory, performs a quarterly assessment of the legal and regulatory risks, and initiates any required corrective actions.

With publicly listed shares in the United States, QIAGEN is subject to Sections 302 and 404 of the Sarbanes Oxley Act. QIAGEN enacted internal controls and procedures over its financial reporting in 2011 as described in more detail in Item 15 of the 2011 Annual Report on Form 20-F on file with the U.S. Securities and Exchange Commission. In a report on its audit of internal controls over financial reporting, the external auditor Ernst & Young expressed the opinion that QIAGEN has maintained in all material respects effective internal control over financial reporting as of December 31, 2011, under the applied criteria issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), an organization formed by various professional accounting and auditing associations in the U.S.

Whistleblower Policy and Code of Conduct

QIAGEN adopted a Whistleblower Policy concerning the reporting of alleged irregularities within QIAGEN of a general, operational or financial nature. Furthermore, a Code of Conduct was adopted that outlines business principles for our employees and rules of conduct. The Code of Conduct can be found on our website at www.qiagen.com.

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Anti-Takeover Measures

In 2004, the Supervisory Board granted an option to the Dutch Foundation Stichting Preferente Aandelen QIAGEN that allows the Foundation to acquire preference shares from QIAGEN if (i) a person has (directly or indirectly) acquired or has expressed a desire to acquire more than 20% of our issued share capital, or (ii) a person holding at least a 10% interest in the share capital has been designated as a hostile person by our Supervisory Board. The option enables the Foundation to acquire preference shares equal to the number of our outstanding common shares at the time of the relevant exercise of the right, less one share. When exercising the option and exercising its voting rights on these shares, the Foundation must act in the interest of QIAGEN and the interests of our stakeholders. No preference shares are currently outstanding.

Dutch Corporate Governance Code

The corporate governance structure and compliance with the Code is the joint responsibility of the Managing Board and the Supervisory Board. They are accountable for this responsibility to the General Meeting. QIAGEN continues to seek ways to improve its corporate governance by measuring itself against international best practice. The Code was last amended on December 10, 2008, and can be found at www.commissiecorporategovernance.nl.

Non-application of a specific best practice provision is not in itself considered objectionable by the Code and may well be justified because of particular circumstances relevant to a company. In accordance with Dutch law, we disclose in our Annual Report the application of the Code’s principles and best practice provisions.

To the extent that we do not apply certain principles and best practice provisions, or do not intend to apply these in the current or the subsequent year, we state the reasons.

QIAGEN takes a positive view of the Code and applies nearly all of the best practice provisions. However, we prefer not to apply some provisions due to the international character of our business as well as the fact – acknowledged by the Commission that drafted the Code – that existing contractual agreements between QIAGEN and individual members of the Managing Board cannot be set aside at will.

The following provides an overview of exceptions that we have identified:

1. | Best practice provision II.1.1 recommends that a management board member is appointed for a maximum period of four years. A member may be reappointed for a term of not more than four years at a time.

Members of the Managing Board are appointed annually for a one-year period beginning on the day following the General Meeting up to and including the day of the General Meeting held in the following year. The employment agreements with the Managing Directors have an indefinite term, but can be terminated with a three-month notice period by the Managing Director and with a six-month notice period by QIAGEN. These agreements were entered into before the Code became applicable; the terms were not renegotiated since this was not considered to be in the interest of QIAGEN. All members of the Managing Board have additional employment agreements with other QIAGEN affiliates that have notice periods deviating from terms in the employment agreements with QIAGEN N.V. (Mr. Uder and Dr. Schorr 24 months, Mr. Schatz and Mr. Sackers 36 months).

2. | Best practice provision II.2.4 recommends that the number of granted options shall be dependent on the achievement of challenging targets specified beforehand.

From time to time, members of our Managing Board are granted options to acquire common shares at an exercise price higher than the market price on the grant date (as determined by reference to an organized trading market or association). Our view is that the “challenging target” has been set at the time of granting the options since the holder cannot realize any value from these options unless the price of our common shares has risen above the exercise price.

3. | Best practice provision II.2.5 recommends that shares granted to management board members without financial consideration shall be retained for a period of at least five years or until at least at the end of the employment, if this period is shorter. The number of shares to be granted shall be dependent on the achievement of clearly quantifiable and challenging targets specified before-hand.

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GOVERNANCE REPORT Additional Information

Members of the Managing Board are granted restricted stock units from time to time. Restricted stock units represent rights to receive common shares at a future date. The number of granted restricted stock units is dependent upon the achievement of predefined performance goals. Restricted stock units are structured so that 40% of a grant vests after three years, 50% after five years and the remaining 10% after ten years. Further, a portion of the restricted stock unit grants made to Mr. Schorr and Mr. Uder in 2011 are linked to certain predifined milestones that must be achieved before receiving the grants (in addition to the vesting periods).

4. | Best practice provision II.2.8 recommends that the maximum remuneration in the event of dismissal of a management board member may not exceed one year’s salary (the “fixed” remuneration component). If the maximum of one year’s salary would be manifestly unreasonable for a management board member who is dismissed during his first term of office, such board member shall be eligible for a severance pay not exceeding twice the annual salary.

As explained in item 1 (best practice provision II.1.1), in addition to their employment agreements with QIAGEN N.V., the Managing Board members have entered into employment agreements with certain QIAGEN affiliates that have notice periods of either 24 months or 36 months. In case of termination of an agreement without serious cause as defined by the applicable law, the respective affiliate would remain obliged to compensate the Managing Board member for the remaining term of the employment agreement. QIAGEN believes that these contractual arrangements are well justified due to the long tenures of the Managing Board members.

5. | Best practice provision II.2.11 recommends that the supervisory board may recover from the management board members any variable remuneration awarded on the basis of incorrect financial or other data.

The current employment agreements with the Managing Directors, which were entered into before the recent Code changes took effect, do not include so-called “clawback” provisions. In the event of unjustified variable remuneration awards that were based on incorrect financial or other data, the Supervisory Board would make use of its statutory powers.

6. | Best practice provision III.3.5 recommends that a person may be appointed to the supervisory board for a maximum of three 4-year terms.

The Chairman of the Supervisory Board, Prof. Riesner, has been a member of the Supervisory Board of QIAGEN N.V. since its establishment in 1996. Further, Mr. Horn-naess has served on the Supervisory Board since 1998. Prof. Riesner contributes his profound scientific expertise and excellent connections in the scientific community to the board profile, while Mr. Hornnaess contributes significant value due to his long-term experience in various management positions in the life science industry. Both board members have unique knowledge about QIAGEN that is considered to be highly valuable. As a result, QIAGEN strongly supports the reappointment of both members beyond the 12-year term as recommended by the Code.

7. | Best practice provision III.7.1 recommends that a supervisory board member may not be granted any shares and/or rights to shares by way of remuneration.

QIAGEN has granted stock options to the members of the Supervisory Board as a remuneration component since its establishment. Since 2007, Supervisory Board members have also been granted restricted stock units. This practice is in compliance with international business practice in our industry, and we consider the granting of stock options or stock rights as an important incentive to attract individuals with the required skills and expertise to serve on our Supervisory Board.

8. | Best practice provision IV.1.1 recommends that a general meeting of shareholders is empowered to cancel binding nominations of candidates for the management board and supervisory board, and to dismiss members of either board by a simple majority of votes of those in attendance, although the company may require a quorum of at least one third of the voting rights outstanding for such vote to have force. If such quorum is not represented, but a majority of those in attendance votes in favor of the proposal, a second meeting may be convened and its vote will be binding, even without a one-third quorum.

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Our Articles of Association currently state that the General Meeting may at all times overrule a binding nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital. Although a deviation from provision IV.1.1 of the Code, the Supervisory Board and the Managing Board hold the view that these provisions will enhance the continuity of QIAGEN’s management and policies.

Declaration of Compliance of QIAGEN N.V. regarding the German Corporate Governance Code

In QIAGEN’s 2001 Annual Report, the Managing Board and the Supervisory Board of QIAGEN N.V. declared their intention to disclose compliance with the German Corporate Governance Code pursuant to §161 of the German Stock Corporation Law (AktG) or state the deviations for a particular period. QIAGEN N.V. is a company organized under the laws of The Netherlands and subject to the laws, rules and regulations of this country. In addition, our shares are listed on the NASDAQ Stock Exchange. As a result, the compliance of QIAGEN with the German Corporate Governance Code is dependent on the code’s compatibility with the laws, rules, regulations and customs that QIAGEN is subject to in The Netherlands and the U.S. QIAGEN declares compliance with the German Corporate Governance Code with the following exceptions:

1. | Item 3.8 paragraph 2

If the company takes out a D&O (directors’ and officers’ liability insurance) policy for the Management Board, a deductible of at least 10% of the loss up to at least the amount of one and a half times the fixed annual compensation of the Management Board member must be agreed upon.

A similar deductible must be agreed upon in any D&O policy for the Supervisory Board.

QIAGEN’s D&O insurance policy provides for a fixed deductible of $10,000 for members of the Managing Board and the Supervisory Board, which we consider an appropriate sign by our members of taking responsibility for their actions.

2. | Item 4.2.3 paragraph 3

For instance, share or index-based compensation elements related to the enterprise may come into consideration as variable components. These elements shall be related to demanding, relevant comparison parameters. Changing such performance targets or the comparison parameters retroactively shall be excluded. For extraordinary developments a possibility of limitation (cap) must in general be agreed upon by the Supervisory Board.

From time to time, the members of our Managing Board are granted restricted stock units and options to acquire common shares at an exercise price set 2% higher than the market price on the grant date (as determined by reference to an organized trading market or association). These option rights and restricted stock units are subject to multiyear vesting periods and sales restrictions. Members of the Managing Board cannot realize any profit from these grants unless they succeed in increasing shareholder value on a long-term period. For these reasons, as well as to ensure comparability to equity-based incentives granted by peer companies in our industry, we consider these terms to be the most appropriate comparison parameters for the restricted stock units and stock options granted to Managing Board members.

3. | Item 4.2.3 paragraph 4 and 5

In concluding Management Board contracts, care shall be taken to ensure that payments made to a Management Board member on premature termination of his contract without serious cause do not exceed the value of two years’ compensation (severance payment cap) and compensate no more than the remaining term of the contract. The severance payment cap shall be calculated on the basis of the total compensation for the past full financial year and if appropriate also the expected total compensation for the current financial year.

Payments promised in the event of premature termination of a Management Board member’s contract due to a change of control shall not exceed 150% of the severance payment cap.

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GOVERNANCE REPORT Additional Information

The employment agreements with Managing Directors have an indefinite term, but can be terminated with a three-month notice period by the Managing Director and with a six-month notice period by QIAGEN. All members of the Managing Board have additional employment agreements with other QIAGEN affiliates that have longer notice periods (Mr. Uder and Dr. Schorr 24 months, Mr. Schatz and Mr. Sackers 36 months). In case of a termination without serious cause as defined by the applicable law, QIAGEN would remain obliged to compensate the Managing Board Member for the remaining term of the agreement.

No arrangements exist for early retirement of Managing Board members. In the event of the sale or transfer of all or substantially all of QIAGEN’s assets or business to an acquirer in one or several transactions including a merger, consolidation or a transfer of shares to a third party, the Managing Board members are entitled to a Change of Control bonus payment commensurate to a multiple (Mr. Schatz 5 times, Mr. Sackers 3 times, Mr. Uder and Dr. Schorr 2 times) of their annual salary (fixed payment and annual bonus). QIAGEN believes that these severance and Change of Control agreements are appropriate due to the long tenures of the Managing Board members.

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FINANCIAL RESULTS

Consolidated Financial Statements |  |  | 131 |
Notes to Consolidated Financial Statements |  |  | 138 |
Auditor’s Report |  |  | 183 |

##### Table of Contents

FINANCIAL RESULTS Consolidated Financial Statements

Financial Results

CONSOLIDATED BALANCE SHEETS: ASSETS

|  |  |  |  | As of December 31 |
$1,000 |  | Note |  |  | 2011 |  |  | 2010 |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | (2 | ) |  |  | 221,133 |  |  |  | 828,407 |
Short-term investments |  |  | (9 | ) |  |  | 54,577 |  |  |  | 106,077 |
Accounts receivable, net of allowance for doubtful accounts of $4,315 and $3,227 in 2011 and 2010, respectively |  |  | (2 | ) |  |  | 230,770 |  |  |  | 197,418 |
Income taxes receivable |  |  |  |  |  |  | 19,009 |  |  |  | 10,920 |
Inventories, net |  |  | (2 | ) |  |  | 132,236 |  |  |  | 126,633 |
Prepaid expenses and other current assets |  |  | (10 | ) |  |  | 59,055 |  |  |  | 64,402 |
Deferred income taxes |  |  | (14 | ) |  |  | 31,652 |  |  |  | 30,731 |
Total current assets |  |  |  |  |  |  | 748,432 |  |  |  | 1,364,588 |
Long-term assets: |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net |  |  | (11 | ) |  |  | 371,792 |  |  |  | 345,664 |
Goodwill |  |  | (13 | ) |  |  | 1,733,722 |  |  |  | 1,352,281 |
Intangible assets, net of accumulated amortization of $417,430 and $312,326 in 2011 and 2010, respectively |  |  | (13 | ) |  |  | 819,487 |  |  |  | 753,327 |
Deferred income taxes |  |  | (14 | ) |  |  | 26,866 |  |  |  | 37,182 |
Other long-term assets |  |  |  |  |  |  | 56,154 |  |  |  | 60,953 |
Total long-term assets |  |  |  |  |  |  | 3,008,021 |  |  |  | 2,549,407 |
Total assets |  |  |  |  |  |  | 3,756,453 |  |  |  | 3,913,995 |

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS: LIABILITIES AND EQUITY

|  |  |  |  | As of December 31 |
$1,000, except per value |  | Note |  |  | 2011 |  |  | 2010 |
Liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt |  |  | (16 | ) |  |  | 1,617 |  |  |  | 75,835 |
Short-term loans |  |  |  |  |  |  | 142,329 |  |  |  | — |
Accounts payable |  |  |  |  |  |  | 59,848 |  |  |  | 47,803 |
Accrued and other liabilities (of which $7,383 and $6,296 in 2011 and 2010 due to related parties) |  |  | (15 | ), (20) |  |  | 213,769 |  |  |  | 209,054 |
Income taxes payable |  |  |  |  |  |  | 31,211 |  |  |  | 25,211 |
Deferred income taxes |  |  | (14 | ) |  |  | 32,883 |  |  |  | 30,504 |
Total current liabilities |  |  |  |  |  |  | 481,657 |  |  |  | 388,407 |
Long-term liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, net of current portion (of which $445,000 in 2011 and 2010 due to related parties) |  |  | (16 | ), (20) |  |  | 446,005 |  |  |  | 797,171 |
Deferred income taxes |  |  | (14 | ) |  |  | 207,112 |  |  |  | 200,667 |
Other liabilities |  |  |  |  |  |  | 63,881 |  |  |  | 51,397 |
Total long-term liabilities |  |  |  |  |  |  | 716,998 |  |  |  | 1,049,235 |
Commitments and contingencies |  |  | (18 | ) |  |  |  |  |  |  |  |
Equity: |  |  |  |  |  |  |  |  |  |  |  |
Preference shares, 0.01 EUR par value, authorized – 450,000 shares, no shares issued and outstanding |  |  |  |  |  |  | — |  |  |  | — |
Financing preference shares, 0.01 EUR par value, authorized – 40,000 shares, no shares issued and outstanding |  |  |  |  |  |  | — |  |  |  | — |
Common Shares, 0.01 EUR par value, authorized – 410,000 shares, issued and outstanding – 234,221 and 233,115 shares at December 31, 2011 and 2010, respectively |  |  |  |  |  |  | 2,739 |  |  |  | 2,724 |
Additional paid-in capital |  |  |  |  |  |  | 1,673,733 |  |  |  | 1,648,985 |
Retained earnings |  |  |  |  |  |  | 855,928 |  |  |  | 759,890 |
Accumulated other comprehensive income |  |  | (6 | ) |  |  | 15,904 |  |  |  | 64,754 |
Equity attributable to the owners of QIAGEN N.V. |  |  |  |  |  |  | 2,548,304 |  |  |  | 2,476,353 |
Noncontrolling interest |  |  |  |  |  |  | 9,494 |  |  |  | — |
Total equity |  |  |  |  |  |  | 2,557,798 |  |  |  | 2,476,353 |
Total liabilities and equity |  |  |  |  |  |  | 3,756,453 |  |  |  | 3,913,995 |

The accompanying notes are an integral part of these consolidated financial statements.

132 |  | QIAGEN Annual Report 2011

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FINANCIAL RESULTS Consolidated Financial Statements

CONSOLIDATED STATEMENTS OF INCOME

|  |  |  |  |  |  |  | Years ended December 31 |
$1,000, except per share data |  | Note |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Net sales |  |  | (2 | ) |  |  | 1,169,747 |  |  |  | 1,087,431 |  |  |  | 1,009,825 |
Cost of sales |  |  |  |  |  |  | 419,938 |  |  |  | 371,869 |  |  |  | 342,752 |
Gross profit |  |  |  |  |  |  | 749,809 |  |  |  | 715,562 |  |  |  | 667,073 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  |  | (2 | ) |  |  | 130,636 |  |  |  | 126,040 |  |  |  | 107,900 |
Sales and marketing |  |  |  |  |  |  | 307,332 |  |  |  | 267,484 |  |  |  | 244,814 |
General and administrative, integration and other |  |  | (2 | ) |  |  | 185,507 |  |  |  | 110,009 |  |  |  | 115,933 |
Acquisition-related intangible amortization |  |  |  |  |  |  | 26,746 |  |  |  | 23,492 |  |  |  | 18,221 |
Total operating expenses |  |  |  |  |  |  | 650,221 |  |  |  | 527,025 |  |  |  | 486,868 |
Income from operations |  |  |  |  |  |  | 99,588 |  |  |  | 188,537 |  |  |  | 180,205 |
Other income (expense): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  | 6,128 |  |  |  | 4,457 |  |  |  | 3,522 |
Interest expense |  |  |  |  |  |  | (25,358 | ) |  |  | (27,815 | ) |  |  | (29,641 | )
Other income, net |  |  |  |  |  |  | 15,854 |  |  |  | 7,942 |  |  |  | 18,244 |
Total other expense |  |  |  |  |  |  | (3,376 | ) |  |  | (15,416 | ) |  |  | (7,875 | )
Income before provision for income taxes |  |  |  |  |  |  | 96,212 |  |  |  | 173,121 |  |  |  | 172,330 |
Provision for income taxes |  |  | (2 | ), (14) |  |  | 1,263 |  |  |  | 28,810 |  |  |  | 34,563 |
Net income |  |  |  |  |  |  | 94,949 |  |  |  | 144,311 |  |  |  | 137,767 |
Net (loss) attributable to noncontrolling interest |  |  |  |  |  |  | (1,089 | ) |  |  | — |  |  |  | — |
Net income attributable to the owners of QIAGEN N.V. |  |  |  |  |  |  | 96,038 |  |  |  | 144,311 |  |  |  | 137,767 |
Basic net income per common share attributable to the owners of QIAGEN N.V. |  |  |  |  |  |  | 0.41 |  |  |  | 0.62 |  |  |  | 0.67 |
Diluted net income per common share attributable to the owners of QIAGEN N.V. |  |  |  |  |  |  | 0.40 |  |  |  | 0.60 |  |  |  | 0.64 |
Weighted-average common shares outstanding (in thousand) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | (3 | ) |  |  | 233,850 |  |  |  | 232,635 |  |  |  | 206,928 |
Diluted |  |  | (3 | ) |  |  | 239,064 |  |  |  | 240,483 |  |  |  | 213,612 |

The accompanying notes are an integral part of these consolidated financial statements.

QIAGEN Annual Report 2011 |  | 133

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

|  | Years ended December 31 |
$1,000 |  | Note |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Net income |  |  |  |  |  |  | 94,949 |  |  |  | 144,311 |  |  |  | 137,767 |
Gains (losses) on cash flow hedges, before tax |  |  | (7 | ) |  |  | 5,417 |  |  |  | 14,636 |  |  |  | (12,741 | )
Reclassification adjustments on cash flow hedges, before tax |  |  | (7 | ) |  |  | (3,961 | ) |  |  | (8,874 | ) |  |  | 8,367 |
Cash flow hedges, before tax |  |  |  |  |  |  | 1,456 |  |  |  | 5,762 |  |  |  | (4,374 | )
Gains (losses) on pensions, before tax |  |  |  |  |  |  | 180 |  |  |  | (184 | ) |  |  | 300 |
Foreign currency translation adjustments, before tax |  |  |  |  |  |  | (51,383 | ) |  |  | 10,920 |  |  |  | 42,001 |
Other comprehensive (loss) income, before tax |  |  |  |  |  |  | (49,747 | ) |  |  | 16,498 |  |  |  | 37,927 |
Income tax relating to components of other comprehensive (loss) income |  |  |  |  |  |  | (1,174 | ) |  |  | (1,890 | ) |  |  | (2,936 | )
Total other comprehensive (loss) income, after tax |  |  |  |  |  |  | (50,921 | ) |  |  | 14,608 |  |  |  | 34,991 |
Comprehensive income |  |  |  |  |  |  | 44,028 |  |  |  | 158,919 |  |  |  | 172,758 |
Comprehensive loss attributable to noncontrolling interest |  |  |  |  |  |  | 3,160 |  |  |  | — |  |  |  | — |
Comprehensive income attributable to the owners of QIAGEN N.V. |  |  |  |  |  |  | 47,188 |  |  |  | 158,919 |  |  |  | 172,758 |

The accompanying notes are an integral part of these consolidated financial statements.

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FINANCIAL RESULTS Consolidated Financial Statements

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

|  |  |  |  | Common Shares |  |  | Additional Paid-In |  |  | Retained |  |  | Accumulated Other Comprehensive |  |  | Equity Attributable to the Owners of |  |  | Non- controlling |  |  | Total |
$1,000 except shares |  | Note |  |  | Shares |  |  | Amount |  |  | Capital |  |  | Earnings |  |  | Income (Loss) |  |  | QIAGEN N.V. |  |  | Interest |  |  | Equity |
Balance at December 31, 2008 |  |  |  |  |  |  | 197,839 |  |  |  | 2,212 |  |  |  | 958,665 |  |  |  | 477,812 |  |  |  | 15,155 |  |  |  | 1,453,844 |  |  |  | — |  |  |  | 1,453,844 |
Net income |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 137,767 |  |  |  | — |  |  |  | 137,767 |  |  |  | — |  |  |  | 137,767 |
Unrealized loss, net on hedging contracts |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (9,005 | ) |  |  | (9,005 | ) |  |  | — |  |  |  | (9,005 | )
Realized loss, net on hedging contracts |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,841 |  |  |  | 5,841 |  |  |  | — |  |  |  | 5,841 |
Unrealized gain, net on pension |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 210 |  |  |  | 210 |  |  |  | — |  |  |  | 210 |
Translation adjustment, net |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 37,945 |  |  |  | 37,945 |  |  |  | — |  |  |  | 37,945 |
Common stock issuance from public offering |  |  |  |  |  |  | 31,625 |  |  |  | 462 |  |  |  | 623,109 |  |  |  | — |  |  |  | — |  |  |  | 623,571 |  |  |  | — |  |  |  | 623,571 |
Common stock issuances from conversion of warrants |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | — |  |  |  | 1 |
Common stock issuances under employee stock plans |  |  |  |  |  |  | 2,610 |  |  |  | 37 |  |  |  | 26,883 |  |  |  | — |  |  |  | — |  |  |  | 26,920 |  |  |  | — |  |  |  | 26,920 |
Tax benefit of employee stock plans |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 3,363 |  |  |  | — |  |  |  | — |  |  |  | 3,363 |  |  |  | — |  |  |  | 3,363 |
Share-based compensation |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 9,747 |  |  |  | — |  |  |  | — |  |  |  | 9,747 |  |  |  | — |  |  |  | 9,747 |
Proceeds from subscription receivables |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 965 |  |  |  | — |  |  |  | — |  |  |  | 965 |  |  |  | — |  |  |  | 965 |
Balance at December 31, 2009 |  |  |  |  |  |  | 232,074 |  |  |  | 2,711 |  |  |  | 1,622,733 |  |  |  | 615,579 |  |  |  | 50,146 |  |  |  | 2,291,169 |  |  |  | — |  |  |  | 2,291,169 |
Net income |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 144,311 |  |  |  | — |  |  |  | 144,311 |  |  |  | — |  |  |  | 144,311 |
Unrealized gain, net on hedging contracts |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 9,807 |  |  |  | 9,807 |  |  |  | — |  |  |  | 9,807 |
Realized gain, net on hedging contracts |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (6,125 | ) |  |  | (6,125 | ) |  |  | — |  |  |  | (6,125 | )
Unrealized loss, net on pension |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (129 | ) |  |  | (129 | ) |  |  | — |  |  |  | (129 | )
Translation adjustment, net |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11,055 |  |  |  | 11,055 |  |  |  | — |  |  |  | 11,055 |
Common stock issuances under employee stock plans |  |  |  |  |  |  | 1,041 |  |  |  | 13 |  |  |  | 11,228 |  |  |  | — |  |  |  | — |  |  |  | 11,241 |  |  |  | — |  |  |  | 11,241 |
Tax benefit of employee stock plans |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 445 |  |  |  | — |  |  |  | — |  |  |  | 445 |  |  |  | — |  |  |  | 445 |
Share-based compensation |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 13,592 |  |  |  | — |  |  |  | — |  |  |  | 13,592 |  |  |  | — |  |  |  | 13,592 |
Proceeds from subscription receivables |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 987 |  |  |  | — |  |  |  | — |  |  |  | 987 |  |  |  | — |  |  |  | 987 |
Balance at December 31, 2010 |  |  |  |  |  |  | 233,115 |  |  |  | 2,724 |  |  |  | 1,648,985 |  |  |  | 759,890 |  |  |  | 64,754 |  |  |  | 2,476,353 |  |  |  | — |  |  |  | 2,476,353 |
Acquisition of Ipsogen S.A. |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 42,437 |  |  |  | 42,437 |
Acquisition of Ipsogen S.A. shares from noncontrolling interests |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (29,783 | ) |  |  | (29,783 | )
Net income (loss) |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 96,038 |  |  |  | — |  |  |  | 96,038 |  |  |  | (1,089 | ) |  |  | 94,949 |
Unrealized gain, net on hedging contracts |  |  | (6 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,707 |  |  |  | 3,707 |  |  |  | — |  |  |  | 3,707 |
Realized gain, net on hedging contracts |  |  | (6 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (2,825 | ) |  |  | (2,825 | ) |  |  | — |  |  |  | (2,825 | )
Unrealized gain, net on pension |  |  | (6 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 126 |  |  |  | 126 |  |  |  | — |  |  |  | 126 |
Translation adjustment, net |  |  | (6 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (49,858 | ) |  |  | (49,858 | ) |  |  | (2,071 | ) |  |  | (51,929 | )
Common stock issuances under employee stock plans |  |  |  |  |  |  | 1,106 |  |  |  | 15 |  |  |  | 8,763 |  |  |  | — |  |  |  | — |  |  |  | 8,778 |  |  |  | — |  |  |  | 8,778 |
Tax benefit of employee stock plans |  |  |  |  |  |  | — |  |  |  | — |  |  |  | (4,565 | ) |  |  | — |  |  |  | — |  |  |  | (4,565 | ) |  |  | — |  |  |  | (4,565 | )
Share-based compensation |  |  | (17 | ) |  |  | — |  |  |  | — |  |  |  | 19,539 |  |  |  | — |  |  |  | — |  |  |  | 19,539 |  |  |  | — |  |  |  | 19,539 |
Proceeds from subscription receivables |  |  |  |  |  |  | — |  |  |  | — |  |  |  | 1,011 |  |  |  | — |  |  |  | — |  |  |  | 1,011 |  |  |  | — |  |  |  | 1,011 |
Balance at December 31, 2011 |  |  |  |  |  |  | 234,221 |  |  |  | 2,739 |  |  |  | 1,673,733 |  |  |  | 855,928 |  |  |  | 15,904 |  |  |  | 2,548,304 |  |  |  | 9,494 |  |  |  | 2,557,798 |

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CASH FLOWS

|  | Years ended December 31 |
$1,000 |  | Note |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 94,949 |  |  |  | 144,311 |  |  |  | 137,767 |
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of businesses acquired: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  | 70,456 |  |  |  | 57,511 |  |  |  | 48,575 |
Amortization of acquisition-related intangible assets |  |  |  |  |  |  | 96,921 |  |  |  | 85,268 |  |  |  | 71,819 |
Non-cash acquisition and restructuring related costs |  |  |  |  |  |  | 43,029 |  |  |  | — |  |  |  | 10,030 |
Share-based compensation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  | (17 | ) |  |  | 19,539 |  |  |  | 13,592 |  |  |  | 9,747 |
Excess tax benefits from share-based compensation |  |  |  |  |  |  | (4,153 | ) |  |  | (1,976 | ) |  |  | (5,942 | )
Deferred income taxes |  |  | (14 | ) |  |  | (31,861 | ) |  |  | (19,942 | ) |  |  | (10,609 | )
Gain on sale of investments |  |  |  |  |  |  | — |  |  |  | — |  |  |  | (11,501 | )
Other |  |  |  |  |  |  | (1,184 | ) |  |  | (12,113 | ) |  |  | 1,907 |
Net changes in operating assets and liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  | (2 | ) |  |  | (28,203 | ) |  |  | (6,884 | ) |  |  | (25,213 | )
Inventories |  |  | (2 | ) |  |  | (15,945 | ) |  |  | 2,348 |  |  |  | (21,534 | )
Prepaid expenses and other |  |  | (10 | ) |  |  | (10,082 | ) |  |  | 6,431 |  |  |  | (9,364 | )
Other assets |  |  |  |  |  |  | (4,183 | ) |  |  | (2,965 | ) |  |  | (8,213 | )
Accounts payable |  |  |  |  |  |  | 7,261 |  |  |  | 3,482 |  |  |  | (9,076 | )
Accrued and other liabilities |  |  | (15 | ) |  |  | 19,577 |  |  |  | (26,983 | ) |  |  | 23,859 |
Income taxes |  |  | (14 | ) |  |  | (6,244 | ) |  |  | 13,639 |  |  |  | 12,473 |
Other |  |  |  |  |  |  | (5,098 | ) |  |  | (4,967 | ) |  |  | 2,270 |
Net cash provided by operating activities |  |  |  |  |  |  | 244,779 |  |  |  | 250,752 |  |  |  | 216,995 |
Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of property, plant and equipment |  |  |  |  |  |  | (86,805 | ) |  |  | (79,666 | ) |  |  | (52,179 | )
Proceeds from sale of equipment |  |  |  |  |  |  | 2,020 |  |  |  | 3,474 |  |  |  | 869 |
Purchases of intangible assets |  |  |  |  |  |  | (34,583 | ) |  |  | (44,243 | ) |  |  | (17,178 | )
Proceeds from sale / cash paid for investments |  |  |  |  |  |  | (19,284 | ) |  |  | 7,985 |  |  |  | 1,476 |
Purchases of short-term investments |  |  | (9 | ) |  |  | (186,817 | ) |  |  | (110,076 | ) |  |  | (40,000 | )
Sales of short-term investments |  |  | (9 | ) |  |  | 242,630 |  |  |  | 44,000 |  |  |  | — |
Cash paid for acquisitions, net of cash acquired |  |  | (4 | ) |  |  | (457,483 | ) |  |  | (36,985 | ) |  |  | (234,732 | )
Net cash used in investing activities |  |  |  |  |  |  | (540,322 | ) |  |  | (215,511 | ) |  |  | (341,744 | )

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FINANCIAL RESULTS Consolidated Financial Statements

CONSOLIDATED STATEMENTS OF CASH FLOWS

|  | Years ended December 31 |
$1,000 |  | Note |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from short-term debt |  |  | (16 | ) |  |  | 142,329 |  |  |  | — |  |  |  | — |
Proceeds from debt |  |  | (16 | ) |  |  | 44,000 |  |  |  | 3,016 |  |  |  | — |
Repayment of debt |  |  | (16 | ) |  |  | (469,857 | ) |  |  | (50,000 | ) |  |  | (25,000 | )
Principal payments on capital leases |  |  |  |  |  |  | (3,703 | ) |  |  | (3,262 | ) |  |  | (2,991 | )
Proceeds from subscription receivables |  |  |  |  |  |  | 1,011 |  |  |  | 987 |  |  |  | 965 |
Excess tax benefits from share-based compensation |  |  |  |  |  |  | 4,153 |  |  |  | 1,976 |  |  |  | 5,942 |
Issuance of common shares |  |  |  |  |  |  | 8,778 |  |  |  | 11,241 |  |  |  | 650,492 |
Acquisition of noncontrolling interest |  |  |  |  |  |  | (29,783 | ) |  |  | — |  |  |  | — |
Other financing activities |  |  |  |  |  |  | (7,558 | ) |  |  | 814 |  |  |  | (210 | )
Net cash (used in) provided by financing activities |  |  |  |  |  |  | (310,630 | ) |  |  | (35,228 | ) |  |  | 629,198 |
Effect of exchange rate changes on cash and cash equivalents |  |  |  |  |  |  | (1,101 | ) |  |  | 2,837 |  |  |  | (12,205 | )
Net (decrease) increase in cash and cash equivalents |  |  |  |  |  |  | (607,274 | ) |  |  | 2,850 |  |  |  | 492,244 |
Cash and cash equivalents, beginning of year |  |  |  |  |  |  | 828,407 |  |  |  | 825,557 |  |  |  | 333,313 |
Cash and cash equivalents, end of year |  |  |  |  |  |  | 221,133 |  |  |  | 828,407 |  |  |  | 825,557 |
Supplemental cash flow disclosures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for interest |  |  |  |  |  |  | 20,760 |  |  |  | 25,557 |  |  |  | 27,662 |
Cash paid for income taxes |  |  |  |  |  |  | 41,494 |  |  |  | 33,781 |  |  |  | 36,003 |
Supplemental disclosure of non-cash investing and financing activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment purchased through capital lease |  |  |  |  |  |  | 545 |  |  |  | 1,185 |  |  |  | 376 |
Intangible assets acquired in non-monetary exchange |  |  |  |  |  |  | — |  |  |  | 30,341 |  |  |  | — |

The accompanying notes are an integral part of these consolidated financial statements.

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Notes to Consolidated Financial Statements

December 31, 2011

1. | Description of the Business and Basis of Presentation

QIAGEN N.V., a Netherlands holding company, and subsidiaries (we, our or the Company) is a leading provider of innovative sample and assay technologies. These technologies – consumable products such as sample and assay kits and automated instrumentation systems – empower customers to transform raw biological samples into valuable molecular information. We serve four major customer classes: Molecular Diagnostics laboratories; Applied Testing customers in fields such as forensics, veterinary diagnostics and food safety; Pharmaceutical research and development groups, and Academic researchers. We market our products in more than 100 countries.

During 2011, we acquired all the shares of Cellestis Ltd. and a majority of the shares in Ipsogen S.A, as discussed more fully in Note 4. These acquisitions have been accounting for as business combinations, and the acquired companies’ results have been included in the accompanying financial statements form their respective dates of acquisition.

Basis of Presentation

The accompanying consolidated financial statements were prepared in conformity with U.S. generally accepted accounting principles (GAAP) and all amounts are presented in U.S. dollars rounded to the nearest thousand, unless otherwise indicated.

Reclassifications

Certain reclassifications of prior year amounts have been made to conform to the current year presentation in Note 14 related to the prior year presentation of certain gross deferred tax asset information.

2. | Summary of Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include the accounts of QIAGEN N.V. and its wholly-owned subsidiaries that are not considered variable interest entities. All significant intercompany accounts and transactions have been eliminated. Investments in companies where we exercise significant influence over the operations but do not have control, and where we are not the primary beneficiay, are accounted for using the equity method. All other investments are accounted for under the cost method. When there is a portion of equity in an acquired subsidiary not attributable, directly or indirectly, to the Company, we record the fair value of the noncontrolling interests at the acquisition date and classify the amounts attributable to noncontrolling interests separately in equity in the consolidated financial statements. Any subsequent changes in the Company’s ownership interest while the Company retains its controlling financial interest in its subsidiary are accounted for as equity transactions.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and disclosure of contingencies at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Concentrations of Risk

We buy materials for products from many suppliers, and are not dependent on any one supplier or group of suppliers for the business as a whole. However, key components of certain products, including certain instrumentation components and chemicals, are available only from a single source. If supplies from these vendors were delayed or interrupted for any reason, we may not be able to obtain these materials timely or in sufficient quantities in order to produce certain products and sales levels could be negatively affected. Additionally, our customers include researchers at pharmaceutical and biotechnology companies, academic institutions and government and private laboratories. Fluctuations in the research and development budgets of these researchers and their organizations for applications in which our products are used could have a significant effect on the demand for our products.

The financial instruments used in managing our foreign currency and interest rate exposures have an element of risk in that the counterparties may be unable to meet the terms of the agreements. We attempt to minimize this risk by limiting the counterparties to a diverse group of highly-rated international financial institutions. The carrying values of our financial instruments incorporate the non-performance risk by using market pricing for credit risk. However, we have no reason to believe that any counterparties will default on their obligations and therefore do not expect to record any losses as a result of counterparty default. In order to minimize our exposure with any single counterparty, we have entered into master agreements which allow us to manage the exposure with the respective counterparty on a net basis. In connection with such agreements, we do not require and are not required to pledge collateral for derivative transactions.

Other financial instruments that potentially subject us to concentrations of credit risk are cash and cash equivalents, short-term investments, and accounts receivable. We attempt to minimize the risks related to cash and cash equivalents and short-term investments by dealing with highly-rated financial institutions and investing in a broad and diverse range of financial instruments. We have established guidelines related to credit quality and maturities of investments intended to maintain safety and liquidity. Concentration of credit risk with respect to accounts receivable is limited due to a large and diverse customer base, which is dispersed over different geographic areas. Allowances are maintained for potential credit losses and such losses have historically been within expected ranges.

Foreign Currency Translation

Our reporting currency is the U.S. dollar and our subsidiaries’ functional currencies are generally the local currency of the respective countries in which they are headquartered. All amounts in the financial statements of entities whose functional currency is not the U.S. dollar are translated into U.S. dollar equivalents at exchange rates as follows: (1) assets and liabilities at period-end

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rates, (2) income statement accounts at average exchange rates for the period, and (3) components of equity at historical rates. Translation gains or losses are recorded in equity, and transaction gains and losses are reflected in net income as a component of other income, net. Realized gains or losses on the value of derivative contracts entered into to hedge the exchange rate exposure of receivables and payables are also included in net income as a component of other income, net. The net gain (loss) on foreign currency transactions in 2011, 2010 and 2009 was $12.4 million, $2.6 million, and $5.6 million, respectively, and is included in other income, net.

Segment Information

| • |  | We determined that we operate as one operating segment in accordance with the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 280, Segment Reporting. Our chief operating decision maker (CODM) makes decisions based on the Company as a whole. In addition, we have a common basis of organization and types of products and services which derive revenues and consistent product margins. Accordingly, we operate and make decisions as one reporting unit. Certain reclassifications of prior year amounts have been made to conform to the current year presentation, including reclassifications related to reporting as a single segment under ASC Topic 280, Segment Reporting.

Revenue Recognition

Our revenues are reported net of sales and value added taxes, discounts and sales allowances, and are derived primarily from the sale of consumable and instrumentation products, and to a much lesser extent, from the sale of services, intellectual property and technology. We recognize revenue when four basic criteria are met: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the fee is fixed or determinable; and (4) collectability is reasonably assured.

| • |  | Consumable and Related Products: Revenue from consumable product sales is generally recognized upon transfer of title consistent with the shipping terms. We maintain a small amount of consignment inventory at certain customer locations. Revenues for the consumable products which are consigned in this manner are recognized upon consumption. We generally allow returns of consumable products if the product is returned in a timely manner and in good condition. Allowances for returns are provided for based upon the historical pattern of returns and Management’s evaluation of specific factors that impact the risk of returns.

Related revenue includes license fees, intellectual property and patent sales, royalties and milestone payments. License fees from research collaborations include payments for technology transfer and access rights. Non-refundable, up-front payments received in connection with collaborative research and development agreements are generally deferred and recognized on a straight-line basis over the contract period during which there is any continuing obligation. Revenue from intellectual property and patent sales is recognized when earned, either at the time of sale, or over the performance period. Payments for milestones, generally based on the achievement of substantive and at-risk performance criteria, are recognized in full at such time as the specified milestone has been achieved according to the terms of the agreement. Royalties from licensees are based on reported sales of licensed products and revenues are calculated based on contract terms when reported sales are reliably measurable, fees are fixed or determinable and collectability is reasonably assured.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

| • |  | Instrumentation: Revenue from instrumentation includes the instrumentation equipment, installation, training and other instrumentation services, such as extended warranty services or product maintenance contracts. Revenue from instrumentation equipment is generally recognized when title passes to the customer, upon either shipment or written customer acceptance after satisfying any installation and training requirements. For instrumentation equipment sales that contain other obligations, such as providing consumables, advanced training, separately-priced extended warranty services or separately-priced extended maintenance contracts, revenue is first allocated to separately-priced extended warranty or maintenance contracts based on the stated contract price, then the remaining contract value is allocated to the remaining elements based on objective, verifiable evidence of the fair value of the individual components. The price charged when the element is sold separately generally determines its fair value. Revenues for extended warranty services or extended product maintenance contracts are deferred and recognized on a straight-line basis over the contract period.

We have contracts with multiple elements which are accounted for under ASC 605-25, Revenue Recognition – Multiple-Element Arrangements. Multiple-element arrangements are assessed to determine whether there is more than one unit of accounting. In order for a deliverable to qualify as a separate unit of accounting, all of the following criteria must be met:

| • |  | The delivered items have value to the client on a stand-alone basis;

| • |  | The arrangement includes a general right of return relative to the delivered items; and

| • |  | Delivery or performance of the undelivered items is considered probable and substantially in the control of the Company.

Arrangement consideration is allocated at the inception of the arrangement to all deliverables on the basis of their relative selling price. Effective as of January 1, 2011, when applying the relative selling price method, the selling price for each deliverable is determined using (a) vendor-specific objective evidence of selling price, if it exists; or otherwise (b) third-party evidence of selling price. If neither vendor-specific objective evidence nor third-party evidence of selling price exists for a deliverable, then the best estimated selling price for the deliverable is used. Prior to January 1, 2011, only the vendor-specific objective evidence of selling price was used. The arrangement consideration is allocated to the separate units of accounting based on each unit’s relative fair value. Revenue is then recognized using a proportional-performance method, such as recognizing revenue based on relative fair value of products or services delivered, or on a straight-line basis as appropriate. If these criteria are not met, deliverables included in an arrangement are accounted for as a single unit of accounting and revenue and costs are deferred until the period in which the final deliverable is provided.

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Warranty

We provide warranties on our products against defects in materials and workmanship generally for a period of one year. A provision for estimated future warranty costs is recorded in cost of sales at the time product revenue is recognized. Product warranty obligations are included in accrued and other liabilities in the accompanying consolidated balance sheets. The changes in the carrying amount of warranty obligations are as follows:

|  | Total |
$1,000 |  |  |
Balance at December 31, 2009 |  |  | 3,468 |
Provision charged to cost of sales |  |  | 3,678 |
Usage |  |  | (3,258 | )
Adjustments to previously provided warranties, net |  |  | (477 | )
Currency translation |  |  | 29 |
Balance at December 31, 2010 |  |  | 3,440 |
Provision charged to cost of sales |  |  | 4,376 |
Usage |  |  | (3,649 | )
Adjustments to previously provided warranties, net |  |  | (198 | )
Currency translation |  |  | (59 | )
Balance at December 31, 2011 |  |  | 3,910 |

Research and Development

Research and product development costs are expensed as incurred. Research and development expenses consist primarily of salaries and related expenses, facility costs and amounts paid to contract research organizations, and laboratories for the provision of services and materials as well as costs for internal use or clinical trials.

Government Grants

We recognize government grants when there is reasonable assurance that all conditions will be complied with and the grant will be received. Our government grants generally represent subsidies for specified activities and are therefore recognized when earned as a reduction of the expenses recorded for the activity that the grants are intended to compensate. Thus, when the grant relates to research and development expense, the grant is recognized over the same period that the related costs are incurred. Otherwise, amounts received under government grants are recorded as liabilities in the balance sheet. When the grant relates to an asset, the value of the grant is deducted from the carrying amount of the asset and recognized over the same period that the related asset is depreciated.

Shipping and Handling Income and Costs

Shipping and handling costs charged to customers are recorded as revenue in the period that the related product sale revenue is recorded. Associated costs of shipping and handling are included in sales and marketing expenses. For the years ended December 31, 2011, 2010 and 2009, shipping and handling costs totaled $24.0 million, $19.9 million and $17.5 million, respectively.

Advertising Costs

The costs of advertising are expensed as incurred and are included as a component of sales and marketing expense. Advertising costs for the years ended December 31, 2011, 2010 and 2009 were $6.3 million, $7.6 million and $10.6 million, respectively.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

General and Administrative, Integration and Other

General and administrative expenses primarily represent the costs required to support administrative infrastructure. In addition, we incur indirect acquisition and business integration costs in connection with business combinations. These costs represent incremental costs that we believe would not have been incurred absent the business combinations. Major components of these costs include payroll and related costs for employees remaining with the Company on a transitional basis; public relations, advertising and media costs for re-branding of the combined organization; and, consulting and related fees incurred to integrate or restructure the acquired operations. Other costs include relocation and restructuring costs. These costs are expensed as incurred.

Income Taxes

We account for income taxes under the liability method. Under this method, total income tax expense is the amount of income taxes expected to be payable for the current year plus the change from the beginning of the year for deferred income tax assets and liabilities established for the expected further tax consequences resulting from differences in the financial reporting and tax basis of assets and liabilities. Deferred tax assets and/or liabilities are determined by multiplying the differences between the financial reporting and tax reporting bases for assets and liabilities by the enacted tax rates expected to be in effect when such differences are recovered or settled. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date.

Tax benefits are initially recognized in the financial statements when it is more likely than not that the position will be sustained upon examination by the tax authorities. Such tax positions are initially and subsequently measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority using the cumulative probability method, assuming the tax authority has full knowledge of the position and all relevant facts. Our policy is to recognize interest accrued related to unrecognized tax benefits in interest expense and penalties within the income tax provision.

Derivative Instruments

We enter into derivative financial instrument contracts to minimize the variability of cash flows or income statement impact associated with the anticipated transactions being hedged or to hedge fluctuating interest rates. As changes in foreign currency or interest rate impact the value of anticipated transactions, the fair value of the forward or swap contracts also changes, offsetting foreign currency or interest rate fluctuations. Derivative instruments are recorded on the balance sheet at fair value. Changes in fair value of derivatives are recorded in current earnings or other comprehensive income, depending on whether a derivative is designated as part of a hedge transaction.

Share-Based Payments

Compensation cost for all share-based payments is recorded based on the grant date fair value.

Stock Options: We utilize the Black-Scholes-Merton valuation model for estimating the fair value of our stock options granted. Option valuation models, including Black-Scholes-Merton, require the input of highly subjective assumptions, and changes in the assumptions used can materially affect the grant date fair value of an award. These assumptions include the risk-free rate of interest, expected dividend yield, expected volatility, expected life of the award and forfeiture rate.

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| • |  | Risk-Free Interest Rate – This is the average U.S. Treasury rate (having a term that most closely resembles the expected life of the option) at the date the option was granted.

| • |  | Dividend Yield – We have never declared or paid dividends on our common stock and do not anticipate declaring or paying any dividends in the foreseeable future.

| • |  | Expected Volatility – Volatility is a measure of the amount by which a financial variable such as a share price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. We use a combination of the historical volatility of our stock price and the implied volatility of market-traded options of our stock to estimate the expected volatility assumption input to the Black-Scholes-Merton model. Our decision to use a combination of historical and implied volatility is based upon the availability of actively traded options of our stock and our assessment that such a combination is more representative of future expected stock price trends.

| • |  | Expected Life of the Option – This is the period of time that the options granted are expected to remain outstanding. We estimated the expected life by considering the historical exercise behavior. We use an even exercise methodology, which assumes that all vested, outstanding options are exercised uniformly over the balance of their contractual life.

| • |  | Forfeiture Rate – This is the estimated percentage of options granted that are expected to be forfeited or cancelled on an annual basis before becoming fully vested. We estimated the forfeiture rate based on historical forfeiture experience.

| • |  | Restricted Stock Units: Restricted stock units represent rights to receive Common Shares at a future date. The fair market value is determined based on the number of restricted stock units granted and the fair market value of our shares on the grant date. The fair market value at the time of the grant, less an estimate for pre-vesting forfeitures, is recognized in expense over the vesting period.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash on deposit in banks and other cash invested temporarily in various instruments that are short-term and highly liquid, and having an original maturity of less than 90 days at the date of purchase.

Short-Term Investments

Short-term investments are classified as “available for sale” and stated at fair value in the accompanying balance sheet. Interest income is accrued when earned and changes in fair market values are reflected as unrealized gains and losses, calculated on the specific identification method, as a component of accumulated other comprehensive income. The amortization of premiums and accretion of discounts to maturity arising from acquisition is included in interest income. A decline in fair value that is judged to be other-than-temporary is accounted for as a realized loss and the write-down is included in the consolidated statements of income. Realized gains and losses, determined on a specific identification basis, on the sale of short-term investments are included in income.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, notes receivable, accounts receivable, accounts payable and accrued liabilities approximate their fair values because of the short maturities of those instruments. The carrying value of our variable rate debt and capital leases approximates their fair values because of the short maturities and/or interest rates which are comparable to those available to us on similar terms. The fair values of the notes payable to QIAGEN Finance and Euro Finance, further discussed in Note 16, were estimated by using available over-the-counter market information on the convertible bonds which were issued by QIAGEN Finance and Euro Finance, the values of which correlate to the fair value of the loan arrangements we have with QIAGEN Finance and Euro Finance which include the notes payable, the guarantee and the warrant agreement (further discussed in Note 12).

Accounts Receivable

Our accounts receivable are unsecured and we are at risk to the extent such amounts become uncollectible. We continually monitor accounts receivable balances, and provide for an allowance for doubtful accounts at the time collection becomes questionable based on payment history or age of the receivable. Amounts determined to be uncollectible are written off against the reserve. For the years ended December 31, 2011, 2010 and 2009, write-offs of accounts receivable totaled $0.6 million, $0.8 million and $0.6 million, while provisions for doubtful accounts which were charged to expense totaled $2.1 million, $1.4 million and $1.7 million, respectively. For all years presented, no single customer represented more than ten percent of accounts receivable or consolidated net sales.

Inventories

Inventories are stated at the lower of cost, determined on a first-in, first-out basis, or market and include material, capitalized labor and overhead costs. Inventories consisted of the following as of December 31, 2011 and 2010:

|  | As of December 31 |
$1,000 |  | 2011 |  |  | 2010 |
Raw materials |  |  | 26,645 |  |  |  | 23,738 |
Work in process |  |  | 33,757 |  |  |  | 33,043 |
Finished goods |  |  | 71,834 |  |  |  | 69,852 |
Total inventories |  |  | 132,236 |  |  |  | 126,633 |

Property, Plant and Equipment

Property, plant and equipment, including equipment acquired under capital lease obligations, are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the assets (one to 40 years). Amortization of leasehold improvements is computed on a straight-line basis over the lesser of the remaining life of the lease or the estimated useful life of the improvement asset. We have a policy of capitalizing expenditures that materially increase assets’ useful lives and charging ordinary maintenance and repairs to operations as incurred. When property or equipment is disposed of, the cost and related accumulated depreciation and amortization are removed from the accounts and any gain or loss is included in earnings.

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Acquired Intangibles and Goodwill

Acquired intangibles with alternative future uses are carried at cost less accumulated amortization and consist of licenses to technology held by third parties and other acquired intangible assets. Amortization is computed over the estimated useful life of the underlying patents, which has historically ranged from one to twenty years. Purchased intangible assets acquired in business combinations, other than goodwill, are amortized over their estimated useful lives unless these lives are determined to be indefinite. Intangibles are assessed for recoverability considering the contract life and the period of time over which the intangible will contribute to future cash flow. The unamortized cost of intangible assets, where cash flows are independent and identifiable from other assets, is evaluated periodically and adjusted, if necessary, if events and circumstances indicate that a decline in value below the carrying amount has occurred.

Amortization expense related to developed technology and patent and license rights which have been acquired in a business combination is included in cost of sales. Amortization of trademarks, customer base and non-compete agreements which have been acquired in a business combination is recorded in operating expense under the caption ‘acquisition-related intangible amortization.’ Amortization expenses of intangible assets not acquired in a business combination are recorded within either the cost of sales, research and development or sales and marketing line items based on the use of the asset.

Goodwill represents the difference between the purchase price and the estimated fair value of the net assets acquired arising from business combinations. Goodwill is subject to impairment tests annually or earlier if indicators of potential impairment exist, using a fair-value-based approach. We have elected to perform our annual test for indications of impairment as of October 1 of each year. Following the annual impairment tests for the years ended December 31, 2011, 2010 and 2009, goodwill has not been impaired.

Investments

We have investments in non-marketable securities issued by privately held companies. These investments are included in other long-term assets in the accompanying consolidated balance sheets and are accounted for using the equity or cost method of accounting.

Investments are evaluated at least quarterly, or sooner if impairment indicators are noted, to determine if declines in value are other-than-temporary. In making that determination, we consider all available evidence relating to the realizable value of a security. This evidence includes, but is not limited to, the following:

| • |  | Adverse financial conditions of a specific issuer, segment, industry, region or other variables;

| • |  | The length of time and the extent to which the fair value has been less than cost; and

| • |  | The financial condition and near-term prospects of the issuer.

The fair values of any of our cost or equity method investments have declined below their carrying value whenever adverse events or changes in circumstances indicate that recorded values may not be recoverable. If any such decline is considered to be other than temporary (based on various factors, including historical financial results, product development activities and the overall health of the affiliate’s industry), then a write-down of the investment would be recorded in operating expense to its estimated fair value.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

Impairment of Long-Lived Assets

We review our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or a group of assets may not be recoverable. We consider, amongst other indicators, a history of operating losses or a change in expected sales levels to be indicators of potential impairment. Assets are grouped and evaluated for impairment at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other groups of assets. If an asset is determined to be impaired, the loss is measured as the amount by which the carrying amount of the asset exceeds fair value which is determined by applicable market prices, when available. When market prices are not available, we generally measure fair value by discounting projected future cash flows of the asset. Considerable judgment is necessary to estimate discounted future cash flows. Accordingly, actual results could differ from such estimates. During 2011, in connection with our internal restructuring we recorded an asset impairment charge of $42.1 million related to the abandonment of certain projects. There were no material impairment losses recognized for long-lived assets during the years ended December 31, 2010 and 2009.

Recent Authoritative Pronouncements

Adoption of New Accounting Standards

In September 2011, the FASB issued Accounting Standard Update (ASU) No. 2011-08, Testing Goodwill for Impairment (the revised standard). The revised standard is intended to reduce the cost and complexity of the annual goodwill impairment test by providing entities an option to perform a “qualitative” assessment to determine whether further impairment testing is necessary. We did not use this option in 2011.

In June 2011, the FASB issued ASU No. 2011-05, Comprehensive Income (Topic 220) – Presentation of Comprehensive Income, to increase the prominence of items reported in other comprehensive income and to facilitate convergence of U.S. GAAP and IFRS. This amendment requires that all nonowner changes in equity be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendment therefore eliminates the option to present components of other comprehensive income as part of the statement of changes in equity. This amendment does not change the items reported under other comprehensive income, it does not change when an item of other comprehensive income must be reclassified to net income and entities can choose to show line items net of tax effects or show one amount of aggregate income tax expense or benefit. This amendment must be applied retrospectively and for public entities, these amendments become effective for interim and fiscal periods beginning after December 15, 2011. We believe we currently comply with the provisions of this amendment by using the two statement approach.

In May 2011, the FASB issued ASU No. 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS, to amend FASB ASC 820, Fair Value Measurement, to improve comparability of fair value measurements in both U.S. GAAP and IFRS financial statements. Under these amendments, the FASB does not intend to cause any change in the application of the requirements under Topic 820. Some amendments provide clarification on the application of existing fair value measurement requirements, while other amendments change a particular principle or requirement for measuring fair value, or change disclosure requirements about fair value measurements. The amendments are to be applied prospectively and are effective for public entities for interim and annual periods beginning after December 15, 2011. We do not believe the adoption of this guidance will have a material impact on our consolidated financial statements.

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In December 2010, the FASB issued ASU No. 2010-29, Disclosure of Supplementary Pro Forma Information for Business Combinations – a consensus of the FASB Emerging Issues Task Force, to amend FASB ASC 805, Business Combinations, regarding how public entities disclose supplemental pro forma information for business combinations that occur during the year. Under the amended guidance, a public entity that presents comparative financial statements must disclose the revenue and earnings of the combined entity as though the business combination(s) that occurred during the current year had occurred as of the beginning of the prior annual reporting period. The guidance in ASU 2010-29 also amends ASC 805 to require public entities to provide a description of the nature and amount of any material, nonrecurring pro forma adjustments directly attributable to business combination(s) that are included in the reported pro forma revenue and earnings. We adopted this update on January 1, 2011.

In April 2010, the FASB issued ASU No. 2010-17, Revenue Recognition – Milestone Method (Topic 605): Milestone Method of Revenue Recognition. The ASU codifies the consensus reached in Emerging Issues Task Force Issue No. 08-9, “Milestone Method of Revenue Recognition.” The amendments in this ASU provide guidance on defining a milestone and determining when it may be appropriate to apply the milestone method of revenue recognition for research or development transactions. Consideration that is contingent on achievement of a milestone in its entirety may be recognized as revenue in the period in which the milestone is achieved only if the milestone is judged to meet certain criteria to be considered substantive. Milestones should be considered substantive in their entirety and may not be bifurcated. An arrangement may contain both substantive and nonsubstantive milestones, and each milestone should be evaluated individually to determine if it is substantive. The amendments in the ASU are effective on a prospective basis for milestones achieved in fiscal years, and interim periods within those years, beginning on or after June 15, 2010. Early adoption is permitted. We adopted these updates on January 1, 2011 without any impact.

In April 2010, the FASB issued ASU No. 2010-12, Income Taxes (Topic 740). This ASU codifies an SEC Staff Announcement relating to accounting for the Health Care and Education Reconciliation Act of 2010 and the Patient Protection and Affordable Care Act. On March 30, 2010, the U.S. President signed the Health Care and Education Reconciliation Act of 2010, which is a reconciliation bill that amends the Patient Protection and Affordable Care Act that was signed by the President on March 23, 2010 (collectively, the “Acts”). Questions had arisen about the effect, if any, of the two different signing dates. The SEC has concluded that the two Acts, when taken together, represent the current healthcare reforms as passed by U.S. Congress and signed by the U.S. President and therefore would not object to the view that the two Acts should be considered together for accounting purposes. As a result of the Acts, a 2.3% excise tax will be imposed on the sale, including leases, of any taxable medical devices by the manufacturer, producer or importer of such devices. A “taxable medical device” is any FDA regulated device intended for human use. The excise tax will apply to the sales of all taxable medical devices occurring in the U.S. after December 31, 2012. While we continue to evaluate the impact of the Acts, at the present time, we expect a net positive impact from the legislation due to the expected increase in net sales resulting from increased health coverage, which will be partially offset by the excise tax.

In October 2009, the FASB issued new authoritative guidance regarding “Revenue Recognition – Multiple Deliverable Revenue Arrangements.” This guidance provides amendments for separating consideration in multiple deliverable arrangements and removes the objective-and-reliable-evi-

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

dence-of-fair-value criterion from the separation criteria used to determine whether an arrangement involving multiple deliverables contains more than one unit of accounting, replaces references to “fair value” with “selling price” to distinguish from the fair value measurements required under the “Fair Value Measurements and Disclosures” guidance, provides a hierarchy that entities must use to estimate the selling price, eliminates the use of the residual method for allocation, and expands the ongoing disclosure requirements. We adopted this update on January 1, 2011 and will apply its requirements for all new contracts entered into or materially modified after January 1, 2011. The adoption of this guidance did not have any material impact on the consolidated financial statements.

3. | Net Income per Common Share Attributable to the Owners of QIAGEN N.V.

We present basic and diluted earnings per share. Basic earnings per share is calculated by dividing the net income attributable to the owners of QIAGEN N.V. by the weighted average number of common shares outstanding. Diluted earnings per share reflect the potential dilution that would occur if all “in the money” securities to issue common shares were exercised. The following schedule summarizes the information used to compute earnings per common share:

|  | Years ended December 31 |
$1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Weighted average number of Common Shares used to compute basic net income per Common Share |  |  | 233,850 |  |  |  | 232,635 |  |  |  | 206,928 |
Dilutive effect of stock options and restrictive stock units |  |  | 2,876 |  |  |  | 2,843 |  |  |  | 2,717 |
Dilutive effect of outstanding warrant shares |  |  | 2,338 |  |  |  | 5,005 |  |  |  | 3,967 |
Weighted average number of Common Shares used to compute diluted net income per Common Share |  |  | 239,064 |  |  |  | 240,483 |  |  |  | 213,612 |
Outstanding stock options and restrictive stock units having no dilutive effect, not included in above calculation |  |  | 3,995 |  |  |  | 2,152 |  |  |  | 2,627 |
Outstanding warrants having no dilutive effect, not included in above calculation |  |  | 23,591 |  |  |  | 21,462 |  |  |  | 22,500 |

4. | Acquisitions and Divestiture

Acquisitions have been accounted for as business combinations, and the acquired companies’ results have been included in the accompanying statements of income from their respective dates of acquisition. Our acquisitions have historically been made at prices above the fair value of the acquired net assets, resulting in goodwill, due to expectations of synergies of combining the businesses. These synergies include use of our existing infrastructure, such as sales force, shared service centers, distribution channels and customer relations, to expand sales of the acquired businesses’ products; use of the infrastructure of the acquired businesses to cost-effectively expand sales of our products; and elimination of duplicative facilities, functions and staffing.

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2011 Acquisitions

On August 29, 2011, we acquired all outstanding shares of Cellestis Ltd., a publicly listed Australian company, for $372.5 million in cash. Cellestis develops and provides in vitro diagnostics and life science research products based on its proprietary QuantiFERON technology. The technology provides information on the activity of the cell-mediated functions of the immune system from whole blood samples. By tapping into the body’s memory system, this approach allows diseases to be detected much earlier than with other diagnostic methods, such as PCR. With QuantiFERON , we are adding a “pre-molecular” technology that allows us to look even deeper than with DNA-based molecular testing and thereby strive to feed and drive our DNA-based molecular franchise. QuantiFERON is a trademark of Cellestis, Ltd.

On July 8, 2011, the Board of Directors of Ipsogen S.A. voted in favor of QIAGEN’s offer for €12.90 per share and QIAGEN entered into binding agreements with a group of major shareholders of Ipsogen to purchase a majority of the Ipsogen shares. Ipsogen, a publicly listed company founded in 1999 and based in Marseille, France, is a global leader in molecular profiling and personalized healthcare diagnostics for a broad range of applications in the field of hema-tology. The acquisition of Ipsogen provides QIAGEN access to a broad range of assays covering 15 biomarkers used worldwide for the diagnosis, prognosis and monitoring of patients with various blood cancers. Many of these assays also are used as companion diagnostics in personalized healthcare to make and guide treatment decisions. Many of Ipsogen’s assays have CE-IVD Marking in Europe and have been developed for use on QIAGEN’s Rotor-Gene Q real-time PCR system. This has the potential to enable the smooth and rapid transfer of these unique products onto QIAGEN’s QIAsymphony RGQ, a novel integrated sample-to-result laboratory automation platform that includes the Rotor-Gene Q system.

On July 12, 2011, we paid €40.9 million ($57.4 million) for the initial 62.6% of Ipsogen outstanding common shares. On the acquisition date, the fair value of the noncontrolling interest was $42.4 million and the fair value of all Ipsogen outstanding shares and other equity instruments was approximately €70.2 million ($99.9 million). The fair value of the noncontrolling interest was based on reference to quoted market values of Ipsogen stock. The assignment of the total consideration including the fair value of the noncontrolling interest as of the date of the acquisition is shown below.

Since QIAGEN held more than 50%, a public tender offer for the remaining shares at the same price was submitted and approved by the Autorité des marchés financiers. As of December 31, 2011, we paid an additional $29.8 million and hold 89.3% of the Ipsogen shares on a fully diluted basis.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

As of December 31, 2011, the preliminary purchase price allocations are as follows:

$1,000 |  | Cellestis Acquisition |  |  | Ipsogen Acquisition |  |  | Total |
Purchase price: |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration paid |  |  | 372,452 |  |  |  | 57,436 |  |  |  | 429,888 |
Fair value of remaining shares |  |  | — |  |  |  | 42,437 |  |  |  | 42,437 |
|  |  | 372,452 |  |  |  | 99,873 |  |  |  | 472,325 |
Preliminary allocation: |  |  |  |  |  |  |  |  |  |  |  |
Working capital |  |  | 16,893 |  |  |  | 15,246 |  |  |  | 32,139 |
Fixed and other long-term assets |  |  | 1,112 |  |  |  | 2,429 |  |  |  | 3,541 |
Developed technology, licenses and know-how |  |  | 67,200 |  |  |  | 36,400 |  |  |  | 103,600 |
Customer relationships |  |  | 42,600 |  |  |  | 10,600 |  |  |  | 53,200 |
Tradenames |  |  | 12,000 |  |  |  | 1,500 |  |  |  | 13,500 |
Goodwill |  |  | 270,860 |  |  |  | 52,095 |  |  |  | 322,955 |
Deferred tax liability on fair value of identifiable intangible assets acquired |  |  | (37,981 | ) |  |  | (16,485 | ) |  |  | (54,466 | )
Liabilities assumed |  |  | (232 | ) |  |  | (1,912 | ) |  |  | (2,144 | )
|  |  | 372,452 |  |  |  | 99,873 |  |  |  | 472,325 |

The allocations of the purchase prices are preliminary and based upon information that was available to management at the time the financial statements were prepared. Accordingly, the allocation may change. We have gathered no information that indicates the final purchase price allocations will differ materially from the preliminary estimates other than for the final determination of the intangible assets acquired and the resulting deferred taxes with the acquisition of Cellestis and Ipsogen. Acquisition-related costs are expensed when incurred and are included in general, administrative, integration and other in the accompanying consolidated statements of income.

The amortization periods for the acquired intangible assets with definite lives of Cellestis and Ipsogen is 10 years for developed technology, customer relationships and trade names and 7 years for licenses. The goodwill acquired in these acquisitions is not deductible for tax purposes.

Since the acquisition date, the results of Cellestis and Ipsogen are included in the consolidated results through December 31, 2011. Net sales for the combined companies totaled $28.6 million and net loss attributable to the owners of QIAGEN N.V. was $1.7 million as of December 31, 2011. Acquisition-related costs for Cellestis and Ipsogen for the year ended December 31, 2011, amounted to $5.8 million and $5.6 million, respectively.

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Pro Forma Results

The following unaudited pro forma information assumes that the above acquisitions occurred at the beginning of the periods presented. For the years ended December 31, 2011, and 2010, pro forma net sales would have been $1,213.5 million and $1,140.2 million, pro forma net income would have been $91.9 million and $139.2 million, and pro forma diluted net income per common share would have been $0.38 and $0.58, respectively. These unaudited pro forma results are intended for informational purposes only and are not necessarily indicative of the results of operations that would have occurred had the acquisitions been in effect at the beginning of the periods presented, or of future results of the combined operations.

Other 2011 Acquisitions

During 2011, we completed three acquisitions which individually were not significant to the overall consolidated financial statements. The cash paid for other 2011 acquisitions, net of cash acquired, was $47.9 million. Certain acquisitions included contingent consideration where we are required to assess the acquisition date fair value of the contingent consideration liabilities, which is recorded as part of the purchase consideration. This is discussed further in Note 8, “Fair Value Measurements,” where we continuously assess and adjust the fair value of the contingent consideration liabilities, if necessary, until the settlement or expiration of the contingency occurs. The total fair value of the milestone payments of approximately $24.9 million, determined as of the acquisition date, has been recognized as purchase price. The fair value of the milestone payments of approximately $23.5 million was determined using a discount rate of 0.80% and a probability regarding the accomplishment of the milestones of 90% to 100%. The fair value of the milestone payments of approximately $1.4 million was determined using a discount rate of 3.25% with the assumption that only the first milestone will be met based on the assumptions of the business plan. Under the purchase agreements, we could be required to make additional contingent cash payments totaling $44.0 million through 2016, of which $24.9 million was accrued at December 31, 2011.

2010 Acquisitions

In 2010, we completed two acquisitions which individually were not significant to the overall consolidated financial statements. We acquired 100% of the shares of ESE GmbH (subsequently renamed QIAGEN Lake Constance GmbH), a privately held developer and manufacturer of UV and fluorescence optical measurement devices. ESE is based in Stockach, Germany. ESE pioneered the development and manufacturing of optical measurement systems for medical and industrial applications. The systems utilize unique, high-performance and award-winning fluorescence detection technologies integrated into compact modules. We have demonstrated that ESE’s fluorescence detection systems can be used to measure signals generated by our existing testing technologies, including the HDA and tHDA isothermal assay systems. We also acquired the food market business of the Institute for Product Quality (ifp), a Berlin-based company which sells food, veterinary and environmental quality control assays. The transaction was an asset purchase of primarily patents, know-how, intellectual property rights and customer data related to the business. We have entered into license and contract manufacturing agreements with ifp under which ifp will perform the production for QIAGEN.

Aggregate consideration paid in 2010 for the acquisitions was $22.7 million and an amount of $2.9 million was retained in an escrow account to cover any claims for breach of any representations, warranties or indemnities. During 2011 and 2010, $1.3 million and $1.6 million, respectively, of the funds were released along with the preacquisition contingencies. Furthermore, the purchase agreements for both acquisitions included aggregate milestone payments of up to $8.1 million. As of December 31, 2011 and 2010, $2.6 million and $5.2 million, respectively, was accrued.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

2009 Acquisitions

DxS Ltd. Acquisition

On September 21, 2009, we acquired 100% of the outstanding shares of DxS Ltd. (DxS), a privately held developer and manufacturer of companion diagnostic products headquartered in Manchester, United Kingdom. With this acquisition, we believe that we have taken a strong leadership position in Personalized Healthcare (PHC). The transaction was valued at $94.5 million in cash, plus up to an additional $35.0 million in contingent consideration. The acquisition date fair value of the total consideration was $112.1 million, which consisted of $94.5 million in cash and $17.6 million for the acquisition date fair value of the contingent consideration. A portion of the purchase consideration was deposited in an escrow account with a paying agent to cover any claims for breach of representations, warranties, covenants or indemnities or failure to satisfy certain conditions. As a result, as of December 31, 2011, $4.8 million ($8.7 million as of December 31, 2010) is included in prepaid expenses and other in the accompanying consolidated balance sheets. Correspondingly, we have recorded preacquisition contingencies of $4.8 million ($8.7 million as of December 31, 2010) which are included in accrued and other liabilities in the accompanying consolidated balance sheets.

The contingent consideration of up to $35.0 million relates to specific commercial and other milestones, which, if met, will be paid. The preliminary total fair value of milestones was approximately $17.6 million which, as of the acquisition date, has been recognized as purchase price. The fair value of the milestone payments was determined using a discount rate of 3.25% and a probability regarding the accomplishment of the milestones of 90 – 95%. Refer to Note 8 of the Consolidated Financial Statements, “Fair Value Measurements”, for additional information on the fair market valuation of the contingent consideration. As of December 31, 2011 and 2010, $11.2 million and $14.3 million was accrued, respectively, and $6.3 million and $4.1 million was paid, respectively.

SABiosciences Acquisition

On December 14, 2009, we acquired 100% of the outstanding shares of SABiosciences Corporation, located in Frederick, Maryland (USA). SABiosciences holds a leading position in the design and commercialization of disease- and pathway-focused real-time PCR-based assay panels, which are widely utilized in biomedical research and in the development of future drugs and diagnostics. At closing, the purchase price was $97.6 million in cash. As of December 31, 2010, we have $5.9 million of the consideration in an escrow account with a paying agent to cover any claims for breach of representations, warranties, covenants or indemnities or failure to satisfy certain conditions. This amount is included in prepaid expenses and other in the accompanying Consolidated Balance Sheet. Correspondingly, we have preacquisition contingencies of $5.9 million which are included in accrued and other liabilities in the accompanying Consolidated Balance Sheet. As of December 31, 2011, the full amount of the escrow has been released along with the preacquisition contingencies.

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As of December 31, 2010, the final allocation of the purchase price and transaction costs for the acquisitions of DxS and SABiosciences are follows:

$1,000 |  | DxS Acquisition |  |  | SABiosciences Acquisition |  |  | Total |
Purchase price: |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  | 94,823 |  |  |  | 97,586 |  |  |  | 192,409 |
Fair value of milestones |  |  | 17,599 |  |  |  | — |  |  |  | 17,599 |
|  |  | 112,422 |  |  |  | 97,586 |  |  |  | 210,008 |
Final allocation: |  |  |  |  |  |  |  |  |  |  |  |
Working capital |  |  | 263 |  |  |  | 10,503 |  |  |  | 10,766 |
Fixed and other long-term assets |  |  | 2,199 |  |  |  | 2,215 |  |  |  | 4,414 |
Product technology and know-how |  |  | 16,400 |  |  |  | 26,400 |  |  |  | 42,800 |
Purchased in-process research and development |  |  | 1,400 |  |  |  | 1,700 |  |  |  | 3,100 |
Customer relationships |  |  | 54,900 |  |  |  | 8,400 |  |  |  | 63,300 |
Tradename |  |  | 4,100 |  |  |  | 1,900 |  |  |  | 6,000 |
Goodwill |  |  | 55,417 |  |  |  | 62,433 |  |  |  | 117,850 |
Deferred tax liability on fair value of identifiable intangibleassets acquired |  |  | (21,522 | ) |  |  | (15,965 | ) |  |  | (37,487 | )
Liabilities assumed |  |  | (735 | ) |  |  | — |  |  |  | (735 | )
|  |  | 112,422 |  |  |  | 97,586 |  |  |  | 210,008 |

The weighted-average amortization period for the intangible assets acquired with DxS is 15 years and with SABiosciences is 10 years. The goodwill acquired in these acquisitions is not deductible for tax purposes.

Other 2009 Acquisitions

On August 6, 2009, we acquired Explera s.r.l., a leading supplier in molecular diagnostics and personalized medicine in Italy. The transaction is valued at $7.5 million with a fixed purchase price of $5.0 million and milestone payments of $2.5 million. With this acquisition, we expanded the size of our Molecular Diagnostics sales channel in Italy and added several activities in the area of personalized medicine and access to a suite of CE-IVD pyrosequencing assays.

On November 12, 2009, we acquired 100% of the outstanding shares of a developer, producer and distributor of PCR-based technologies for forensics, kinship and paternity analysis, and other human identity testing applications located in Germany. Upon closing of the transaction, an upfront payment of $23.3 million was paid to the sellers, less an amount of $13.1 million which was originally retained in an escrow account to cover any claims for breach of any of representations, warranties or indemnities. The escrow funds were partially released to the sellers and another $1.6 million was paid to the sellers during 2010. There were no further claims against the escrow as of December 31, 2011.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

2009 Divestiture

In July 2009, through the sale of our subsidiary in Austria, we sold the Olerup SSP product line and related assets to Olerup International AB, a subsidiary of LinkMed, a Swedish venture capital company specializing in life sciences. The Olerup SSP product line includes molecular transplantation testing products used for DNA human leukocyte antigen (HLA) typing. We retained rights to all Olerup SSP assays for applications outside transplantation testing, such as in personalized medicine. The transaction does not affect our presence in new sequencing-based typing assays in the area of transplantation. We recorded a net gain of approximately $1.2 million on the sale of the business, which is recorded in other income, net in 2009.

5. | Restructuring

Late in 2011, we began a project to enhance productivity by streamlining the organization and freeing up resources for reallocation to strategic initiatives to help drive growth and innovation, strengthen our industry leadership position and improve longer-term profitability. This project aims to eliminate organizational layers and overlapping structures, actions that will enhance our processes, speed and productivity. We recorded pretax charges of $74.9 million in the fourth quarter of 2011, of which $5.5 million is recorded in cost of sales and $69.4 million is recorded in general, administrative, integration and other. The pretax charges consists of $20.1 million for workforce reductions and $42.1 million for intangible asset abandonment charges. Additionally, we incurred contract termination and consulting costs of $12.7 million. At December 31, 2011, a restructuring accrual of $26.9 million was included in accrued and other liabilities in the accompanying consolidated balance sheet. We expect to record additional restructuring charges in 2012 related to this program.

The specific restructuring measures and associated estimated costs were based on management’s best business judgment under the existing circumstances at the time the estimates were made. If future events require changes to these estimates, such adjustments will be reflected in the applicable line item in the consolidated statement of operations.

2009 Restructuring of Acquired Business

In October 2009, we started the closure of our facilities and relocation of our activities in Brisbane and Sydney to other locations, primarily to QIAGEN Instruments AG in Switzerland. These restructurings follow the acquisition of Corbett in 2008 and consolidate our instrument manufacturing activities. The closure and relocation were completed in 2010 at a total pre tax cost of approximately $4.2 million, of which $1.9 million was incurred in 2010.

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6. | Accumulated Other Comprehensive Income

The following table is a summary of the components of accumulated other comprehensive income at December 31:

$1,000 |  | 2011 |  |  | 2010 |
Net unrealized loss on cash flow hedging contracts, net of tax of $0.1 million and $0.7 million in 2011 and 2010, respectively |  |  | (762 | ) |  |  | (1,644 | )
Net unrealized gain (loss) on pension, net of tax |  |  | 115 |  |  |  | (11 | )
Foreign currency translation effects from intercompany long-term investment trans-actions, net of tax of $4.9 million and $4.4 million in 2011 and 2010, respectively |  |  | 7,369 |  |  |  | 5,774 |
Foreign currency translation adjustments |  |  | 9,182 |  |  |  | 60,635 |
Accumulated other comprehensive income |  |  | 15,904 |  |  |  | 64,754 |

7. | Derivatives and Hedging

Derivatives and Hedging

In the ordinary course of business, we use derivative instruments, including swaps, forwards and/or options, to manage potential losses from foreign currency exposures and variable rate debt. The principal objective of such derivative instruments is to minimize the risks and/or costs associated with global financial and operating activities. We do not utilize derivative or other financial instruments for trading or other speculative purposes. We recognize all derivatives as either assets or liabilities on the balance sheet on a gross basis, measure those instruments at fair value and recognize the change in fair value in earnings in the period of change, unless the derivative qualifies as an effective hedge that offsets certain exposures. We do not offset the fair value of derivative instruments with cash collateral held or received from the same counterparty under a master netting arrangement.

As of December 31, 2011 and December 31, 2010, all derivatives that qualify for hedge accounting are cash-flow hedges. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income (loss) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. In 2011 and 2010, we did not record any hedge ineffectiveness related to any cash-flow hedges in earnings and did not discontinue any cash-flow hedges. During the next 12 months, we expect that approximately $0.8 million of derivative losses included in accumulated other comprehensive income, based on their valuation as of December 31, 2011, will be reclassified into income. The cash flows derived from derivatives, including those that are not designated as hedges, are classified in the operating section of the consolidated statements of cash flows, in the same category as the consolidated balance sheet account of the underlying item.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

Foreign Currency Derivatives

As a globally active enterprise, we are subject to risks associated with fluctuations in foreign currencies in our ordinary operations. This includes foreign currency-denominated receivables, payables, debt, and other balance sheet positions including intercompany items. We manage balance sheet exposure on a group-wide basis primarily using foreign exchange forward contracts, foreign exchange options and cross-currency swaps.

We had been party to foreign currency forward contracts with an aggregate notional amount of $44.0 million, which were entered into in connection with the notes payable to QIAGEN Finance (see Note 16) and which qualify for hedge accounting as cash-flow hedges. We determined that no ineffectiveness exists related to these derivatives. However, the differences between spot and forward rates were excluded from the assessment of hedge effectiveness and included in interest income as it effectively constitutes the difference in the interest rates of the respective currency pairs. The contracts matured in July 2011, and had fair market values included in accrued and other liabilities in the accompanying consolidated balance sheet at December 31, 2010, of approximately $3.9 million.

In addition, we were party to cross-currency swaps which were entered into in connection with the notes payable to Euro Finance (see Note 16) and which qualified as cash-flow hedges with a notional amount of $120.0 million as of December 31, 2011 and 2010, which mature in November 2012 and had fair market values of $0.7 million included in prepaid and other assets and $1.7 million included in accrued and other liabilities as of December 31, 2011, and as of December 31, 2010, had $4.6 million included in other long-term liabilities in the accompanying consolidated balance sheets.

Undesignated Derivative Instruments

We are party to various foreign exchange forward and swap arrangements which had, at December 31, 2011, an aggregate notional value of approximately $204.0 million and fair values of $5.6 million and $0.8 million, which are included in other assets and other liabilities, respectively, and which expire at various dates through April 2012. The transactions have been entered into to offset the effects from short-term balance sheet exposure to foreign currency exchange risk. Changes in the fair value of these arrangements have been recognized in other income, net.

We were party to various foreign exchange forward and swap arrangements which had, at December 31, 2010, an aggregate notional value of approximately $295.4 million and fair values of $0.7 million and $5.1 million, which are included in other assets and other liabilities, respectively, and which expired at various dates through April 2011. The transactions have been used to offset the effects from short-term balance sheet exposure to foreign currency exchange risk. Changes in the fair value of these arrangements have been recognized in other income, net.

Interest Rate Derivatives

We use interest rate derivative contracts on certain borrowing transactions to hedge fluctuating interest rates. We have entered into interest rate swaps in which we agree to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. During 2008, we entered into interest rate swaps, which effectively fixed the variable interest rates on $200.0 million of our variable rate debt and qualify for hedge accounting as cash-flow hedges. We have determined that no ineffectiveness exists related to these swaps. During 2010, $100.0 million of the swaps matured. The remaining $100.0 million matured in October 2011. As of December 31, 2010, these swaps had an aggregate fair value of $2.7 million, which is recorded in accrued and other liabilities in the accompanying consolidated balance sheets.

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Fair Values of Derivative Instruments

The following table summarizes the fair value amounts of derivative instruments reported in the consolidated balance sheets as of December 31, 2011 and 2010:

|  | Derivatives in Asset Positions Fair Value |  |  | Derivatives in Liability Positions Fair Value |
$1,000 |  | December 31, 2011 |  |  | December 31, 2010 |  |  | December 31, 2011 |  |  | December 31, 2010 |
Derivative instruments designated as hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (2,663 | )
Foreign exchange contracts |  |  | 658 |  |  |  | — |  |  |  | (1,723 | ) |  |  | (8,452 | )
Total derivative instruments designated as hedges |  |  | 658 |  |  |  | — |  |  |  | (1,723 | ) |  |  | (11,115 | )
Undesignated derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  |  | 5,489 |  |  |  | 677 |  |  |  | (769 | ) |  |  | (5,113 | )
Total derivative instruments |  |  | 6,147 |  |  |  | 677 |  |  |  | (2,492 | ) |  |  | (16,228 | )

Gains and Losses on Derivative Instruments

The following tables summarize the locations and gains on derivative instruments for the years ended December 31, 2011 and 2010:

Year ended December 31, 2011 $1,000 |  | Gain (Loss) Recognized in AOCI |  |  | Location of (Gain) Loss in Income Statement |  | (Gain) Loss Reclassified from AOCI into Income |  |  | Gain Recognized in Income |
Cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  |  | 2,721 |  |  | Interest expense |  |  | — |  |  |  | — |
Foreign exchange contracts |  |  | 2,696 |  |  | Other income, net |  |  | (3,961 | ) |  |  | — |
Total |  |  | 5,417 |  |  |  |  |  | (3,961 | ) |  |  | — |
Undesignated derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  |  | — |  |  | Other income, net |  |  | — |  |  |  | 14,194 |
Year ended December 31, 2010 $1,000 |  | Gain (Loss) Recognized in AOCI |  |  | Location of (Gain) Loss in Income Statement |  | (Gain) Loss Reclassified from AOCI into Income |  |  | Loss Recognized in Income |
Cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  |  | 3,611 |  |  | Interest expense |  |  | — |  |  |  | NA |
Foreign exchange contracts |  |  | 11,025 |  |  | Other income, net |  |  | (8,874 | ) |  |  | NA |
Total |  |  | 14,636 |  |  |  |  |  | (8,874 | ) |  |  | NA |
Undesignated derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  |  | NA |  |  | Other income, net |  |  | NA |  |  |  | (2,239 | )

NA – Not applicable

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

The amounts noted in the table above for accumulated other comprehensive income (AOCI) do not include any adjustment for the impact of deferred income taxes.

8. | Fair Value Measurements

Assets and liabilities are measured at fair value according to a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows:

Level 1. Observable inputs, such as quoted prices in active markets;

Level 2. Inputs, other than the quoted price in active markets, that are observable either directly or indirectly; and

Level 3. Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

Our assets and liabilities measured at fair value on a recurring basis consist of short-term investments, which are classified in Level 1 and Level 2 of the fair value hierarchy, derivative contracts used to hedge currency and interest rate risk, which are classified in Level 2 of the fair value hierarchy, and contingent consideration accruals, which are classified in Level 3 of the fair value hierarchy, and are shown in the tables below. In determining fair value for Level 2 instruments, we apply a market approach, using quoted active market prices relevant to the particular instrument under valuation, giving consideration to the credit risk of both the respective counterparty to the contract and the Company. To determine our credit risk, we estimated our credit rating by benchmarking the price of outstanding debt to publicly-available comparable data from rated companies. Using the estimated rating, our credit risk was quantified by reference to publicly-traded debt with a corresponding rating. We value contingent consideration liabilities using Level 3 unobservable inputs, applying the income approach, such as the discounted cash flow technique, or the probability-weighted scenario method. Contingent consideration arrangements obligate us to pay the sellers of an acquired entity if specified future events occur or conditions are met such as the achievement of technological or revenue milestones. We use various key assumptions, such as the probability of achievement of the milestones and the discount rate, to represent the non-performing risk factors and time value when applying the income approach. We regularly review the fair value of the contingent consideration, and reflect any change in the accrual in the condensed consolidated statement of income in the line items commensurate with the underlying nature of milestone arrangements.

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The following table presents our fair value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2011 and 2010:

|  | As of December 31, 2011 |  |  | As of December 31, 2010 |
$1,000 |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term investments |  |  | 9,290 |  |  |  | 45,287 |  |  |  | — |  |  |  | 54,577 |  |  |  | 70,000 |  |  |  | 36,077 |  |  |  | — |  |  |  | 106,077 |
Foreign exchange contracts |  |  | — |  |  |  | 6,147 |  |  |  | — |  |  |  | 6,147 |  |  |  | — |  |  |  | 677 |  |  |  | — |  |  |  | 677 |
|  |  | 9,290 |  |  |  | 51,434 |  |  |  | — |  |  |  | 60,724 |  |  |  | 70,000 |  |  |  | 36,754 |  |  |  | — |  |  |  | 106,754 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  |  | — |  |  |  | 2,492 |  |  |  | — |  |  |  | 2,492 |  |  |  | — |  |  |  | 13,565 |  |  |  | — |  |  |  | 13,565 |
Interest rate contracts |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,663 |  |  |  | — |  |  |  | 2,663 |
Contingent consideration |  |  | — |  |  |  | — |  |  |  | 38,646 |  |  |  | 38,646 |  |  |  | — |  |  |  | — |  |  |  | 22,510 |  |  |  | 22,510 |
|  |  | — |  |  |  | 2,492 |  |  |  | 38,646 |  |  |  | 41,138 |  |  |  | — |  |  |  | 16,228 |  |  |  | 22,510 |  |  |  | 38,738 |

For liabilities with Level 3 inputs, the following table summarizes the activity as of December 31, 2011:

$1,000 |  | Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Contingent Consideration |
Beginning balance at December 31, 2010 |  |  | 22,510 |
Additions from acquisitions |  |  | 24,885 |
Payments |  |  | (9,065 | )
Total loss included in earnings |  |  | 253 |
Foreign currency translation |  |  | 63 |
Ending balance at December 31, 2011 |  |  | 38,646 |

The carrying values of financial instruments, including cash and equivalents, accounts receivable, accounts payable and other accrued liabilities, approximate their fair values due to their short-term maturities. The estimated fair value of long-term debt as disclosed in Note 16 was based on current interest rates for similar types of borrowings. The estimated fair values may not represent actual values of the financial instruments that could be realized as of the balance sheet date or that will be realized in the future. There were no fair value adjustments in the years ended December 31, 2011 and 2010 for nonfinancial assets or liabilities required to be measured at fair value on a nonrecurring basis.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

9. | Short-Term Investments

At December 31, 2011, we had EUR 35.0 million ($45.3 million as of December 31, 2011) of loan note receivables due from financial institutions. These loan receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market and are carried at fair market value, which is equal to the cost. These loans consist of $25.9 million which finally matures in November 2013, and $19.4 million which finally matures in October 2013 with put option rights on a quarterly basis. Interest income is determined using the effective interest rate method. These loans are classified as current assets in the accompanying consolidated balance sheets since we may put the loans at our discretion.

At December 31, 2011, we also had EUR 7.2 million ($9.3 million) in term deposits with final maturities between July 2012 and December 2014. The deposits can be withdrawn at the end of each quarter without penalty.

At December 31, 2010, short-term investments consisted of $70.0 million of investments in short-term funds that have a fixed maturity date. Thereof $50.0 million matured in January 2011 and $20.0 million matured in May 2011. These fund investments are carried at fair market value, which is equal to the cost. Additionally, we had EUR 27.0 million ($36.1 million as of December 31, 2010) of loan note receivables due from financial institutions. These loan receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. These loans consist of $9.4 million which matured in February 2011, and $26.7 million which matures in November 2013 with put option rights on a quarterly basis beginning in February 2011. Interest income is determined using the effective interest rate method. These loans are classified as current assets in the accompanying consolidated balance sheets since we may put the loans at our discretion.

For the years ended December 31, 2011 and 2010, proceeds from sales of short-term investments totaled $242.6 million and $44.0 million, respectively. There were no realized gains or losses during 2011 or 2010.

10. | Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets are summarized as follows as of December 31, 2011 and 2010:

$1,000 |  | 2011 |  |  | 2010 |
Prepaid expenses |  |  | 27,832 |  |  |  | 24,061 |
Amounts held in escrow in connection with acquisitions |  |  | 7,026 |  |  |  | 27,006 |
Value added tax |  |  | 9,488 |  |  |  | 7,039 |
Other receivables |  |  | 14,709 |  |  |  | 6,296 |
Total |  |  | 59,055 |  |  |  | 64,402 |

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11. | Property, Plant and Equipment

Property, plant and equipment, including equipment acquired under capital lease obligations, are summarized as follows as of December 31, 2011 and 2010:

$1,000 |  | Estimated Useful Life (in Years) |  |  | 2011 |  |  | 2010 |
Land |  |  | — |  |  |  | 15,686 |  |  |  | 16,053 |
Buildings and improvements |  |  | 1–40 |  |  |  | 275,529 |  |  |  | 232,946 |
Machinery and equipment |  |  | 1–15 |  |  |  | 176,662 |  |  |  | 157,973 |
Computer software |  |  | 1–10 |  |  |  | 65,344 |  |  |  | 53,948 |
Furniture and office equipment |  |  | 1–15 |  |  |  | 76,809 |  |  |  | 75,030 |
Construction in progress |  |  | — |  |  |  | 51,827 |  |  |  | 59,418 |
|  |  |  |  |  |  | 661,857 |  |  |  | 595,368 |
Less: Accumulated depreciation and amortization |  |  |  |  |  |  | (290,065 | ) |  |  | (249,704 | )
Property, plant and equipment, net |  |  |  |  |  |  | 371,792 |  |  |  | 345,664 |

Amortization of assets acquired under capital lease obligations is included within accumulated depreciation and amortization above for the years ended December 31, 2011 and 2010, respectively. For the years ended December 31, 2011, 2010 and 2009, depreciation and amortization expense totaled $57.0 million, $47.9 million and $42.0 million, respectively. Repairs and maintenance expense was $12.9 million, $11.8 million and $10.9 million in 2011, 2010 and 2009, respectively. For the years ended December 31, 2011 and 2010, construction in progress includes amounts related to the construction of new facilities in Germany and the United States. For the years ended December 31, 2011, 2010 and 2009, interest capitalized in connection with construction projects was not significant.

12. | Investments

We have made strategic investments in certain companies that are accounted for using the equity or cost method of accounting. The method of accounting for an investment depends on the level of influence. We monitor changes in circumstances that may require a reassessment of the level of influence. We periodically review the carrying value of these investments for impairment, considering factors such as the most recent stock transactions and book values from the recent financial statements. The fair value of cost and equity-method investments are estimated

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

when there are identified events or changes in circumstances that may have an impact on the fair value of the investment. A summary of these investments, which are included in other assets, is as follows:

$1,000 |  |  |  |  | Equity Investments as of December 31 |  |  | Share of Income (Loss) for the Years Ended December 31 |
Company |  | Ownership |  |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |  |  | 2009 |
PreAnalytiX GmbH |  |  | 50.00 | % |  |  | 15,723 |  |  |  | 15,308 |  |  |  | 390 |  |  |  | 2,969 |  |  |  | 2,887 |
QBM Cell Science |  |  | 19.50 | % |  |  | 395 |  |  |  | 405 |  |  |  | (10 | ) |  |  | 11 |  |  |  | (49 | )
QIAGEN Finance |  |  | 100.00 | % |  |  | 252 |  |  |  | 949 |  |  |  | 103 |  |  |  | 131 |  |  |  | 115 |
QIAGEN Euro Finance |  |  | 100.00 | % |  |  | 622 |  |  |  | 1,306 |  |  |  | 266 |  |  |  | 273 |  |  |  | 300 |
Pyrobett |  |  | 19.00 | % |  |  | 3,749 |  |  |  | 3,927 |  |  |  | (178 | ) |  |  | (73 | ) |  |  | — |
Dx Assays Pte Ltd |  |  | 33.30 | % |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (316 | )
Scandinavian Gene Synthesis AB |  |  | 40.00 | % |  |  | 15,714 |  |  |  | — |  |  |  | 23 |  |  |  | — |  |  |  | — |
Peak-Service |  |  | 40.00 | % |  |  | 20 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |

We have a 50% interest in a joint venture company, PreAnalytiX GmbH, for which we are not the primary beneficiary. Thus, the investment is accounted for under the equity method. PreAnalytiX was formed to develop, manufacture and market integrated systems for the collection, stabilization and purification of nucleic acids for molecular diagnostic testing. At present, our maximum exposure to loss as a result of our involvement with PreAnalytiX is limited to our share of losses from the equity method investment itself.

We have a 100% interest in QIAGEN Finance (Luxembourg) S.A. (QIAGEN Finance) and QIAGEN Euro Finance (Luxembourg) S.A. (Euro Finance), companies established for the purpose of issuing convertible debt in 2004 and 2006, respectively. In August 2004, we issued $150.0 million of 1.5% Senior Convertible Notes (2004 Notes) due in 2024 through QIAGEN Finance. In May 2006, we completed the offering of $300.0 million of 3.25% Senior Convertible Notes (2006 Notes) due in 2026 through Euro Finance. The proceeds of the 2004 and 2006 Notes were loaned to subsidiaries within the consolidated QIAGEN N.V. group. QIAGEN N.V. has guaranteed all of these Notes, and has agreements with each of QIAGEN Finance and Euro Finance to issue common shares to the investors in the event of conversion of any of the Notes. QIAGEN Finance and Euro Finance are variable interest entities. We are not the primary beneficiary, therefore neither is consolidated. Accordingly, the 2004 and 2006 convertible debt is not included in the consolidated statements of QIAGEN N.V., though QIAGEN N.V. does report the full obligation of the debt through its liabilities to QIAGEN Finance and Euro Finance. QIAGEN N.V. accounts for its investments in QIAGEN Finance and Euro Finance as equity investments and accordingly records 100% of the profit or loss of QIAGEN Finance and Euro Finance in the gain or loss from equity method investees. At present, our maximum exposure to loss as a result of our involvement with QIAGEN Finance and Euro Finance is limited to our share of losses from the equity method investments.

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In 2010, we made a $4.0 million investment in Pyrobett, a company located in Singapore which performs research and development activities related to the development of instruments for use in life sciences.

During the second quarter of 2011, we paid $9.7 million for a 40% share together with a $6.7 million advance payment towards the potential future acquisition of the remaining 60% of Scandinavian Gene Synthesis AB. We hold a call option, exercisable for two months after October 2012 to acquire the remaining 60% of shares. Conversely, the sellers in this transaction hold a put option to sell the remaining 60% of shares to us, exercisable for two months after October 2012. In case neither the put nor the call option is exercised, the sellers must repay $6.7 million. The investment is accounted for under the equity method.

At December 31, 2011 and 2010, we had a total of cost-method investments in non-publicly traded companies with carrying amounts of $6.8 million and $3.4 million, respectively, which are included in other assets. The fair value of these cost-method investments are not estimated as there are no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment.

At December 31, 2011 and 2010, we had a loan receivable of $1.5 million and $1.6 million, respectively, included in other long-term assets, due from Dx Assays, which bears interest at 15% and is due in March 2013.

During 2009, we sold our investment in a privately held company which had been accounted for under the cost method of accounting, and realized a gain of $10.5 million in 2009. The proceeds were received in January 2010, and an additional gain of $0.6 million was recorded in 2010 following the receipt of additional proceeds which had been held in escrow.

13. | Intangible Assets

The following sets forth the acquired intangible assets by major asset class as of December 31, 2011, and December 31, 2010:

|  |  |  |  | 2011 |  |  | 2010 |
$1,000 |  | Weighted Average Life |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patent and license rights |  |  | 11.8 years |  |  |  | 294,854 |  |  |  | (115,310 | ) |  |  | 289,199 |  |  |  | (88,275 | )
Developed technology |  |  | 10.3 years |  |  |  | 605,847 |  |  |  | (210,022 | ) |  |  | 501,287 |  |  |  | (157,838 | )
Customer base, trademarks, in-process R & D and non-compete agreements |  |  | 10.6 years |  |  |  | 336,216 |  |  |  | (92,098 | ) |  |  | 275,167 |  |  |  | (66,213 | )
|  |  |  |  |  |  | 1,236,917 |  |  |  | (417,430 | ) |  |  | 1,065,653 |  |  |  | (312,326 | )
Unamortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | 1,733,722 |  |  |  |  |  |  |  | 1,352,281 |  |  |  |  |

164 |  | QIAGEN Annual Report 2011

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

In connection with the acquisitions as more fully discussed in Note 4, approximately $0.6 million of purchase price was allocated to purchased in-process research and development and capitalized in 2010. No purchased in-process research and development was capitalized in 2011. During 2009, $1.6 million of goodwill from a previous acquisition was written off following the acquisition of DxS Ltd. and is recorded in general and administrative, integration and other expenses in the accompanying consolidated statements of income. Accumulated goodwill impairment totaled $1.6 million as of December 31, 2011 and 2010.

Amortization expense on intangible assets totaled approximately $110.4 million, $94.9 million and $78.4 million, respectively, for the years ended December 31, 2011, 2010 and 2009. During 2011, in connection with the restructuring discussed more fully in Note 5, an abandonment charge of $42.1 million related to discontinued projects was recorded in general, administrative and other. During 2009, additional amortization of $5.0 million was recorded in cost of sales related to the impairment of developed technology, which was triggered by the acquisition of DxS and SABiosciences.

Amortization of intangibles for the next five years is expected to be approximately:

$1,000 |  | Amortization |
Years ended December 31: |  |  |  |
2012 |  |  | 121,763 |
2013 |  |  | 116,004 |
2014 |  |  | 115,021 |
2015 |  |  | 113,826 |
2016 |  |  | 110,979 |

The changes in the carrying amount of goodwill for the years ended December 31, 2011 and 2010 are as follows:

$1,000 |  | Total |
Balance at December 31, 2009 |  |  | 1,337,064 |
Earn-out and milestone payments |  |  | 2,983 |
Purchase adjustments |  |  | 579 |
Effect of foreign currency translation |  |  | 11,655 |
Balance at December 31, 2010 |  |  | 1,352,281 |
Goodwill acquired during the year |  |  | 402,575 |
Earn-out and milestone payments |  |  | 1,122 |
Purchase adjustments |  |  | 615 |
Effect of foreign currency translation |  |  | (22,871 | )
Balance at December 31, 2011 |  |  | 1,733,722 |

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The changes in the carrying amount of goodwill during the year ended December 31, 2011 resulted from the 2011 acquisitions, foreign currency translation and purchase price adjustments primarily related to the 2010 acquisitions. During 2010, changes in goodwill resulted from earn-out and milestone payments, purchase price adjustments related to the 2009 acquisitions and foreign currency translation.

We occasionally enter into transactions which include the purchase, sale, or licensing of patented or non-patented technology as well as supply agreements, particularly in the areas of Pharma and Molecular Diagnostics. The agreements may be structured such that the transaction is required to be accounted for in accordance with ASC No. 845, Nonmonetary Transactions (“ASC No. 845”) and may include multiple deliverables accounted for in accordance with ASC No. 605, Revenue Recognition.

During 2010, we entered into a series of transactions with a third party, under which we exchanged certain intangible assets in a nonmonetary exchange. We have accounted for this transaction under ASC No. 845, and recorded the intangible assets received at the fair value of the assets surrendered. As there is no observable market for these assets, we have performed this nonrecurring fair value measurement based on significant unobservable inputs (Level 3 as defined in Note 8). We have performed the fair value analysis using an income approach, including development of inputs such as future revenues to be generated under the assets, and future costs associated with product development, production, and distribution under the patents, in order to determine an exit price from the perspective of a market participant that holds the assets. As a result of nonmonetary transactions, we recorded intangible assets of $30.3 million, net sales of $11.0 million and deferred revenues of $19.3 million. In the same series of transactions, we agreed to supply certain products and the deferred revenue will be recognized ratably in connection with the supply of the products. During 2011, we recognized $1.6 million of the deferred revenue.

14. | Income Taxes

Income before provision for income taxes for the years ended December 31, 2011, 2010 and 2009 consisted of:

$1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Pretax income in The Netherlands |  |  | 30,232 |  |  |  | 55,431 |  |  |  | 72,190 |
Pretax income from foreign operations |  |  | 65,980 |  |  |  | 117,690 |  |  |  | 100,140 |
|  |  | 96,212 |  |  |  | 173,121 |  |  |  | 172,330 |

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

The provisions for income taxes for the years ended December 31, 2011, 2010 and 2009 are as follows:

$1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Current |  |  |  |  |  |  |  |  |  |  |  |
The Netherlands |  |  | 6,752 |  |  |  | 12,265 |  |  |  | 12,633 |
Foreign |  |  | 26,372 |  |  |  | 36,487 |  |  |  | 32,539 |
|  |  | 33,124 |  |  |  | 48,752 |  |  |  | 45,172 |
Deferred |  |  |  |  |  |  |  |  |  |  |  |
The Netherlands |  |  | — |  |  |  | — |  |  |  | — |
Foreign |  |  | (31,861 | ) |  |  | (19,942 | ) |  |  | (10,609 | )
|  |  | (31,861 | ) |  |  | (19,942 | ) |  |  | (10,609 | )
Total provision for income taxes |  |  | 1,263 |  |  |  | 28,810 |  |  |  | 34,563 |

The Netherlands statutory income tax rate for the years ended December 31, 2011, 2010 and 2009, was 25%, 25.5% and 25.5%. The principal items comprising the differences between income taxes computed at The Netherlands statutory rate and the effective tax rate for the years ended December 31, 2011, 2010 and 2009, are as follows:

|  | 2011 |  |  | 2010 |  |  | 2009 |
$1,000 |  | Amount |  |  | % |  |  | Amount |  |  | % |  |  | Amount |  |  | % |
Income taxes at The Netherlands statutory rate |  |  | 24,053 |  |  |  | 25.0 |  |  |  | 44,146 |  |  |  | 25.5 |  |  |  | 43,944 |  |  |  | 25.5 |
Earnings of subsidiaries taxed at different rates |  |  | 3,204 |  |  |  | 3.3 |  |  |  | 7,710 |  |  |  | 4.5 |  |  |  | 4,710 |  |  |  | 2.7 |
Tax impact from permanent items |  |  | 5,989 |  |  |  | 6.2 |  |  |  | 3,295 |  |  |  | 1.9 |  |  |  | — |  |  |  | — |
Tax impact from tax exempt income |  |  | (23,382 | ) |  |  | (24.3 | ) |  |  | (10,283 | ) |  |  | (6.0 | ) |  |  | (11,039 | ) |  |  | (6.4 | )
Tax contingencies, net |  |  | (1,675 | ) |  |  | (1.7 | ) |  |  | (1,269 | ) |  |  | (0.7 | ) |  |  | 1,774 |  |  |  | 1.0 |
Taxes due to changes in tax rates |  |  | (3,521 | ) |  |  | (3.7 | ) |  |  | (1,400 | ) |  |  | (0.8 | ) |  |  | (3,671 | ) |  |  | (2.0 | )
Restructuring |  |  | — |  |  |  | — |  |  |  | (12,903 | ) |  |  | (7.5 | ) |  |  | — |  |  |  | — |
Prior year taxes |  |  | (2,632 | ) |  |  | (2.7 | ) |  |  | 476 |  |  |  | 0.3 |  |  |  | 912 |  |  |  | 0.5 |
Other items, net |  |  | (773 | ) |  |  | (0.8 | ) |  |  | (962 | ) |  |  | (0.6 | ) |  |  | (2,067 | ) |  |  | (1.2 | )
Total provision for income taxes |  |  | 1,263 |  |  |  | 1.3 |  |  |  | 28,810 |  |  |  | 16.6 |  |  |  | 34,563 |  |  |  | 20.1 |

We conduct business globally and, as a result, file numerous consolidated and separate income tax returns in the Netherlands, Germany, Switzerland and the U.S. federal jurisdiction, as well as in various other state and foreign jurisdictions. In the normal course of business, we are subject to examination by taxing authorities throughout the world. Our tax years since 2000 are open for income tax examinations by tax authorities. Our subsidiaries, with few exceptions, are no longer subject to income tax examinations by tax authorities for years before 2007. The U.S. consolidated group is subject to federal and most state income tax examinations by tax authorities beginning the year ending December 31, 2007, through the current period.

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During 2011, the tax authorities audited the income tax returns of our German subsidiaries for the tax years 2006 through 2009. The outcome of the audit resulted in a current tax liability of $5.3 million primarily related to the timing of certain deductions. As such, a deferred tax asset and deferred tax benefit was recorded that substantially offset the current year liability and expense. As a result of the audit being settled in 2011, the Company released $2.3 million of tax reserves through income tax expense.

We do not currently anticipate that our existing reserves related to uncertain tax positions as of December 31, 2011, will significantly increase or decrease during the twelve-month period ending December 31, 2012; however, various events could cause our current expectations to change in the future. The majority of these uncertain tax positions, if ever recognized in the financial statements, would be recorded in the statement of operations as part of the income tax provision.

Changes in the gross amount of unrecognized tax benefits are as follows:

$1,000 |  | Unrecognized Tax Benefits |
Balance at December 31, 2009 |  |  | 10,338 |
Additions based on tax positions related to the current year |  |  | 322 |
Additions for tax positions of prior years |  |  | 124 |
Settlements with taxing authorities |  |  | (592 | )
Reductions due to lapse of statute of limitations |  |  | (1,361 | )
Decrease from currency translation |  |  | (158 | )
Balance at December 31, 2010 |  |  | 8,673 |
Additions based on tax positions related to the current year |  |  | 757 |
Additions for tax positions of prior years |  |  | 31 |
Settlements with taxing authorities |  |  | (2,257 | )
Reductions due to lapse of statute of limitations |  |  | (207 | )
Decrease from currency translation |  |  | (62 | )
Balance at December 31, 2011 |  |  | 6,935 |

At December 31, 2011, and December 31, 2010, our net unrecognized tax benefits totaled approximately $6.3 million and $8.0 million, respectively, of which $6.3 million in benefits, if recognized, would favorably, affect our effective tax rate in any future period. It is possible that approximately $0.5 million of the unrecognized tax benefits may be released during the next 12 months due to lapse of statute of limitations or settlements with tax authorities.

Our policy is to recognize interest accrued related to unrecognized tax benefits in interest expense and penalties within tax provision expense. At December 31, 2011 and 2010, we have net interest expense and penalties of $0.1 million. At December 31, 2011 and 2010, we have accrued interest of $0.5 million and $0.4 million, respectively, that are not included in the table above.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

We have recorded net deferred tax liabilities of $181.5 million and $163.3 million at December 31, 2011 and 2010, respectively, which are reflected on the consolidated balance sheets at December 31, 2011 and 2010 as follows:

$1,000 |  | 2011 |  |  | 2010 |
Current deferred tax asset |  |  | 31,652 |  |  |  | 30,731 |
Current deferred tax liabilities |  |  | (32,883 | ) |  |  | (30,504 | )
Non-current deferred tax asset |  |  | 26,866 |  |  |  | 37,182 |
Non-current deferred tax liabilities |  |  | (207,112 | ) |  |  | (200,667 | )
Net deferred tax liabilities |  |  | (181,477 | ) |  |  | (163,258 | )

The components of the net deferred tax liability at December 31, 2011 and December 31, 2010 are as follows:

|  | 2011 |  |  | 2010 |
$1,000 |  | Deferred Tax Assets |  |  | Deferred Tax Liability |  |  | Deferred Tax Assets |  |  | Deferred Tax Liability |
Net operating loss carry forwards |  |  | 10,389 |  |  |  | — |  |  |  | 13,658 |  |  |  | — |
Accrued and other liabilities |  |  | 25,981 |  |  |  | (65 | ) |  |  | 30,138 |  |  |  | (6,487 | )
Inventories |  |  | 3,106 |  |  |  | (1,578 | ) |  |  | 3,134 |  |  |  | (1,915 | )
Allowance for bad debts |  |  | 726 |  |  |  | (471 | ) |  |  | 744 |  |  |  | (473 | )
Currency revaluation |  |  | 1,846 |  |  |  | — |  |  |  | 2,303 |  |  |  | (3,588 | )
Depreciation and amortization |  |  | 124 |  |  |  | (19,854 | ) |  |  | 51 |  |  |  | (9,272 | )
Tax credits |  |  | 6,848 |  |  |  | — |  |  |  | 9,067 |  |  |  | — |
Unremitted profits and earnings |  |  | — |  |  |  | (1,175 | ) |  |  | — |  |  |  | (1,042 | )
Intangibles |  |  | 2,523 |  |  |  | (218,027 | ) |  |  | 1,228 |  |  |  | (206,481 | )
Equity awards |  |  | 7,289 |  |  |  | — |  |  |  | 5,624 |  |  |  | — |
Other |  |  | 6,553 |  |  |  | (1,432 | ) |  |  | 7,342 |  |  |  | (1,913 | )
Valuation allowance |  |  | (4,260 | ) |  |  | — |  |  |  | (5,376 | ) |  |  | — |
|  |  | 61,125 |  |  |  | (242,602 | ) |  |  | 67,913 |  |  |  | (231,171 | )
Net deferred tax liabilities |  |  |  |  |  |  | (181,477 | ) |  |  |  |  |  |  | (163,258 | )

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At December 31, 2011, and December 31, 2010, we had $39.4 million and $57.6 million in total foreign net operating losses. At December 31, 2011, and December 31, 2010, we had $5.1 million and $23.5 million of U.S. federal net operating loss (NOL) carryforwards. At December 31, 2011, the entire NOLs in the U.S. are subject to limitations under Section 382 of the Internal Revenue Code but all losses subject to IRC 382 limitation are expected to be utilized before they expire. The net operating losses in the U.S. will expire beginning December 31, 2021 through December 31, 2027. As of December 31, 2011, and December 31, 2010, we had other foreign NOL carryforwards totaling approximately $34.3 million and $34.1 million, respectively. These NOLs were primarily generated from acquisitions and operating losses from our subsidiaries. A portion of the foreign net operating losses will be expiring beginning December 31, 2012. The valuation allowance amounts for the years ended December 31, 2011 and 2010 are $4.3 million and $5.4 million, respectively. We had a decrease of $1.1 million in 2011 largely due to the release of the valuation allowance on assets that were used to offset current tax liability. In 2010, the company had a decrease of valuation allowance of $10.2 million, whereby the tax effects were eliminated by the assets that were no longer available for future use as a result of intercompany sale of assets.

As of December 31, 2011, residual Netherlands income taxes have not been provided on the undistributed earnings of the majority of our foreign subsidiaries as these earnings are considered to be either permanently reinvested or can be repatriated tax free. We have $17.8 million dollars of undistributed earnings that we do not consider permanently reinvested and have recorded deferred income taxes or withholding taxes at December 31, 2011, and December 31, 2010, of approximately $1.2 million and $1.0 million, respectively. All other undistributed earnings can be both distributed in a tax efficient manner and are considered permanently reinvested.

There are no income tax consequences regarding payment of dividends to our shareholders. To date, we have never paid dividends.

15. | Accrued and Other Liabilities

Accrued and other liabilities at December 31, 2011 and 2010 consist of the following:

$1,000 |  | 2011 |  |  | 2010 |
Accrued expenses |  |  | 82,342 |  |  |  | 54,122 |
Payroll and related accruals |  |  | 44,421 |  |  |  | 42,503 |
Preacquisition contingencies assumed in acquisition |  |  | 6,203 |  |  |  | 28,679 |
Accrued earn-outs and milestone payments |  |  | 17,470 |  |  |  | 24,808 |
Swaps and forwards |  |  | 2,492 |  |  |  | 11,685 |
Accrued royalties |  |  | 25,659 |  |  |  | 16,400 |
Deferred revenue |  |  | 23,793 |  |  |  | 20,973 |
Accrued interest on long-term debt |  |  | 7,383 |  |  |  | 6,296 |
Current portion of capital lease obligations |  |  | 4,006 |  |  |  | 3,588 |
Total accrued and other liabilities |  |  | 213,769 |  |  |  | 209,054 |

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

16. | Lines of Credit and Debt

The credit facilities available at December 31, 2011, totaled €406.6 million (approximately $526.1 million). This includes a €400.0 million syndicated multi-currency revolving credit facility expiring December 2016, of which €110.0 million (approximately $142.3 million) was utilized at December 31, 2011, and four other lines of credit amounting to €6.6 million with no expiration date, none of which were utilized as of December 31, 2011. The €400.0 million facility can be utilized in euro, U.K pound or U.S. dollar and bears interest of 0.8% to 2.35% above three months EURIBOR, or LIBOR in relation to any loan not in euro, and is offered with interest periods of one, two, three, six or twelve months. The commitment fee is calculated based on 35% of the applicable margin. No commitment fees were paid in 2011. The revolving facility agreement contains certain financial and non-financial covenants, including but not limited to, restrictions on the encumbrance of assets and the maintenance of certain financial ratios. We were in compliance with these covenants at December 31, 2011. There was no significant outstanding line of credit or short-term borrowings as of December 31, 2010. The credit facilities are for general corporate purposes.

At December 31, 2011, total long-term debt was approximately $447.6 million, $1.6 million of which is current. We believe that funds from operations, existing cash and cash equivalents, and availability of financing facilities as needed, will be sufficient to fund our debt repayments coming due in 2012.

Total long-term debt consists of the following at December 31, 2011 and 2010:

$1,000 |  | 2011 |  |  | 2010 |
$500 million note payable bearing interest at LIBOR plus a variable margin, repaid in 2011 |  |  | — |  |  |  | 425,000 |
Notes payable to QIAGEN Euro Finance bearing interest at an effective rate of 3.97% due in December 2014 |  |  | 300,000 |  |  |  | 300,000 |
Notes payable to QIAGEN Finance bearing interest at an effective rate of 1.84% due in February 2024 |  |  | 145,000 |  |  |  | 145,000 |
R&D-related loan bearing interest at 3.50% due in 2013 |  |  | 2,103 |  |  |  | 3,006 |
Production-related loans bearing interest at effective rates of 4.57% and 6.28% due in May and November 2015 |  |  | 519 |  |  |  | — |
Total long-term debt |  |  | 447,622 |  |  |  | 873,006 |
Less current portion |  |  | 1,617 |  |  |  | 75,835 |
Long-term portion |  |  | 446,005 |  |  |  | 797,171 |

Ipsogen S.A., acquired in July 2011 as discussed in Note 4 above, carries two long-term bank debts. The first loan, effective as of May 25, 2009, was for €0.3 million, having an effective rate of 6.28% and monthly payments due through May 2015. The second loan, effective as of June 25, 2009, was for €0.3 million, having an effective rate of 4.57% and monthly payments due through November 2015. The fair value of both debts approximate their carrying values at December 31, 2011.

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Future principal maturities of long-term debt as of December 31, 2011, are as follows:

Years ending December 31 |  | $1,000 |
2012 |  |  | 1,617 |
2013 |  |  | 486 |
2014 |  |  | 300,000 |
2015 |  |  | 519 |
2016 |  |  | — |
Thereafter |  |  | 145,000 |
|  |  | 447,622 |

Interest expense on long-term debt was $22.1 million, $24.9 million and $26.7 million for the years ended December 31, 2011, 2010 and 2009, respectively.

In May 2006, we completed the offering of $300 million of 3.25% Senior Convertible Notes due in 2026 (2006 Notes) through an unconsolidated subsidiary, QIAGEN Euro Finance. The net proceeds of the 2006 Notes were loaned by Euro Finance to consolidated subsidiaries and at December 31, 2011 and 2010, $300 million is included in long-term debt for the loan amounts payable to Euro Finance. These long-term notes payable to Euro Finance have an effective interest rate of 3.97% and are due in December 2014. Interest is payable semi-annually in May and November. The 2006 Notes were issued at 100% of principal value, and are convertible into 15.0 million common shares at the option of the holders upon the occurrence of certain events, at a price of $20.00 per share, subject to adjustment. QIAGEN N.V. has an agreement with Euro Finance to issue shares to the investors in the event of conversion. This subscription right, along with the related receivable, is recorded at fair value in the equity of QIAGEN N.V. as paid-in capital. The 2006 Notes cannot be called for the first 7 years and are callable thereafter subject to a provisional call trigger of 130% of the conversion price. In addition, the holders of the 2006 Notes may require QIAGEN to repurchase all or a portion of the outstanding Notes for 100% of the principal amount, plus accrued interest, on May 16, 2013, 2017 and 2022. Based on an estimation using available over-the-counter market information on the convertible bond issued by QIAGEN Euro Finance, the fair value of the 2006 Notes at December 31, 2011, was $311.6 million. We have reserved 15.0 million common shares for issuance in the event of conversion.

In August 2004, we completed the sale of $150 million of 1.5% Senior Convertible Notes due in 2024 (2004 Notes), through our unconsolidated subsidiary QIAGEN Finance. The net proceeds of the Senior Convertible Notes were loaned by QIAGEN Finance to consolidated subsidiaries in the U.S. and Switzerland and at December 31, 2011 and 2010, $145 million is included in long-term debt for the loan amounts payable to QIAGEN Finance. These longterm notes payable to QIAGEN Finance originally matured in July 2011. We refinanced the $145 million note, which was loaned under another agreement to another consolidated subsidiary, and is payable to QIAGEN Finance with an effective interest rate of 1.84% and is due in February 2024. This refinancing does not impact the amounts payable by QIAGEN Finance under the 2004 Notes. Interest is payable semi-annually in February and August. The 2004 Notes were issued at 100%

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

of principal value, and are convertible into 11.5 million common shares at the option of the holders upon the occurrence of certain events at a price of $ 12.6449 per share, subject to adjustment. QIAGEN N.V. has an agreement with QIAGEN Finance to issue shares to the investors in the event of conversion. This subscription right, along with the related receivable, is recorded at fair value in the equity of QIAGEN N.V. as paid-in capital. The 2004 Notes may be redeemed, in whole or in part, at QIAGEN’s option on or after August 18, 2011, at 100% of the principal amount, provided that the actual trading price of our common shares exceeds 120% of the conversion price for twenty consecutive trading days. In addition, the holders of the 2004 Notes may require QIAGEN to repurchase all or a portion of the outstanding 2004 Notes for 100% of the principal amount, plus accrued interest, on August 18, 2014 and 2019. Based on an estimation using available over-the-counter market information on the convertible bond issued by QIAGEN Finance, the fair value of the 2004 Notes at December 31, 2011 was $167.0 million. We have reserved 11.5 million common shares for issuance in the event of conversion.

17. | Share-Based Compensation

We adopted the QIAGEN N.V. Amended and Restated 2005 Stock Plan (the Plan) in 2005. The Plan allows for the granting of stock rights and incentive stock options, as well as non-qualified options, stock grants and stock-based awards, generally with terms of up to 10 years, subject to earlier termination in certain situations. Generally, options vest over a three-year period. The vesting and exercisability of certain stock rights will be accelerated in the event of a Change of Control, as defined in the Plan. To date, all option grants have been at the market value on the grant date or at a premium above the closing market price on the grant date. We issue new Common Shares to satisfy option exercises and had approximately 22.1 million Common Shares reserved and available for issuance under this plan at December 31, 2011.

In connection with the 2007 acquisition of Digene Corporation, we assumed three additional equity incentive plans. No new grants will be made under these plans. We had approximately 0.1 million common shares reserved and available for issuance under these plans at December 31, 2011.

Stock Options

During the years ended December 31, 2011 and 2010, we granted 601,897 and 570,282 stock options, respectively. The following are the weighted-average assumptions used in valuing the stock options granted to employees for the years ended December 31, 2011, 2010 and 2009:

|  | 2011 |  |  | 2010 |  |  | 2009 |
Stock price volatility |  |  | 34 | % |  |  | 31 | % |  |  | 40 | %
Risk-free interest rate |  |  | 1.88 | % |  |  | 2.12 | % |  |  | 2.13 | %
Expected life (in years) |  |  | 4.97 |  |  |  | 4.84 |  |  |  | 5.01 |
Dividend rate |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Forfeiture rate |  |  | 6.1 | % |  |  | 7.0 | % |  |  | 7.7 | %

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A summary of the status of employee stock options as of December 31, 2011, and changes during the year then ended is presented below:

All employee options |  | Number of Shares (in thousand) |  |  | Weighted Average Exercise Price |  |  | Weighted Average Contractual Term |  |  | Aggregate Intrinsic Value $1,000 |
Outstanding at January 1, 2011 |  |  | 7,332 |  |  | $ | 13.86 |  |  |  |  |  |  |  |  |
Granted |  |  | 602 |  |  | $ | 19.86 |  |  |  |  |  |  |  |  |
Exercised |  |  | (655 | ) |  | $ | 12.95 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (62 | ) |  | $ | 19.56 |  |  |  |  |  |  |  |  |
Expired |  |  | (690 | ) |  | $ | 21.79 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 6,527 |  |  | $ | 13.61 |  |  |  | 3.65 |  |  | $ | 15,315 |
Exercisable at December 31, 2011 |  |  | 5,453 |  |  | $ | 12.37 |  |  |  | 2.66 |  |  | $ | 15,315 |
Vested and expected to vest at December 31, 2011 |  |  | 6,436 |  |  | $ | 13.53 |  |  |  | 3.57 |  |  | $ | 15,315 |

Generally, stock option grants are valued as a single award with a single average expected term and are amortized over the vesting period. The weighted-average grant date fair value of options granted during the years ended December 31, 2011, 2010 and 2009 was $6.49, $6.42 and $6.33, respectively. The total intrinsic value of options exercised during the years ended December 31, 2011 and 2010 was $3.7 million and $7.7 million, respectively. At December 31, 2011, the unrecognized share-based compensation expense related to employee stock option awards including estimated forfeitures is approximately $4.0 million and will be recognized over a weighted average period of approximately 1.73 years.

At December 31, 2011, 2010 and 2009, options were exercisable with respect to 5.5 million, 6.4 million and 7.4 million Common Shares at a weighted average price of $12.37, $12.93 and $14.36 per share, respectively. The options outstanding at December 31, 2011, expire in various years through 2021.

Restricted Stock Units

Restricted stock units represent rights to receive Common Shares at a future date. There is no exercise price and the fair market value at the time of the grant is recognized ratably over the requisite vesting period, generally 10 years. The fair market value is determined based on the number of restricted stock units granted and the market value of our shares on the grant date. Prevesting forfeitures were estimated to be approximately 7.7%. At December 31, 2011, there was $61.1 million remaining in unrecognized compensation cost including estimated forfeitures related to these awards, which is expected to be recognized over a weighted average period of 8.0 years. The weighted average grant date fair value of restricted stock units granted during the year ended December 31, 2011, was $19.82. The total fair value of restricted stock units released during the years ended December 31, 2011, and 2010 was $8.8 million and $2.5 million, respectively.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

A summary of restricted stock units as of December 31, 2011, and changes during the year are presented below:

Restricted Stock Units |  | Restricted Stock Units (in thousand) |  |  | Weighted Average Contractual Term |  |  | Aggregate Intrinsic Value $1,000 |
Outstanding at January 1, 2011 |  |  | 4,417 |  |  |  |  |  |  |  |  |
Granted |  |  | 1,929 |  |  |  |  |  |  |  |  |
Vested |  |  | (451 | ) |  |  |  |  |  |  |  |
Forfeited and cancelled |  |  | (244 | ) |  |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 5,651 |  |  |  | 2.91 |  |  |  | 78,030 |
Vested and expected to vest at December 31, 2011 |  |  | 4,597 |  |  |  | 2.78 |  |  |  | 63,488 |

Compensation Expense

Share-based compensation expense before taxes for the years ended December 31, 2011, 2010 and 2009 totaled approximately $19.5 million, $13.6 million and $9.7 million, respectively, as shown in the table below. No share-based compensation cost was capitalized in inventory in 2011, 2010 or 2009 as the amounts were not material. The excess tax benefit realized for the tax deductions of the share-based payment arrangements totaled $4.2 million, $2.0 million and $5.9 million, respectively, for the years ended December 31, 2011, 2010 and 2009.

Compensation expense $1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Cost of sales |  |  | 1,672 |  |  |  | 932 |  |  |  | 799 |
Research and development |  |  | 3,055 |  |  |  | 2,087 |  |  |  | 1,826 |
Sales and marketing |  |  | 4,285 |  |  |  | 2,885 |  |  |  | 1,936 |
General and administrative |  |  | 10,528 |  |  |  | 7,688 |  |  |  | 5,186 |
Share-based compensation expense before taxes |  |  | 19,540 |  |  |  | 13,592 |  |  |  | 9,747 |
Income tax benefit |  |  | 4,231 |  |  |  | 2,856 |  |  |  | 2,913 |
Net share-based compensation expense |  |  | 15,309 |  |  |  | 10,736 |  |  |  | 6,834 |

18. | Commitments and Contingencies

Lease Commitments

We lease facilities and equipment under operating lease arrangements expiring in various years through an indefinite period of time. Certain rental commitments provide for escalating rental payments or have renewal options extending through various years. Certain facility and equipment leases constitute capital leases expiring in various years through 2018. The accompanying consolidated financial statements include the assets and liabilities arising from these capital lease obligations. Rent expense under operating lease agreements was $20.3 million, $17.9 million and $13.0 million for the years ended December 31, 2011, 2010 and 2009, respectively.

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Minimum future obligations under capital and operating leases at December 31, 2011, are as follows:

$1,000 |  | Capital Leases |  |  | Operating Leases |
2012 |  |  | 5,384 |  |  |  | 15,879 |
2013 |  |  | 5,307 |  |  |  | 12,067 |
2014 |  |  | 5,196 |  |  |  | 9,316 |
2015 |  |  | 5,178 |  |  |  | 6,905 |
2016 |  |  | 3,922 |  |  |  | 4,763 |
Thereafter |  |  | 2,802 |  |  |  | 3,018 |
|  |  | 27,789 |  |  |  | 51,948 |
Less: Amount representing interest |  |  | (4,287 | ) |  |  |  |
|  |  | 23,502 |  |  |  |  |
Less: Current portion |  |  | (4,006 | ) |  |  |  |
Long-term portion |  |  | 19,496 |  |  |  |  |

Licensing and Purchase Commitments

We have licensing agreements with companies, universities and individuals, some of which require certain up-front payments. Royalty payments are required on net product sales ranging from one to 25 percent of covered products or based on quantities sold. Several of these agreements have minimum royalty requirements. The accompanying consolidated financial statements include accrued royalties relating to these agreements in the amount of $25.7 million and $16.4 million at December 31, 2011 and 2010, respectively. Royalty expense relating to these agreements amounted to $43.3 million, $45.7 million, and $47.2 million for the years ended December 31, 2011, 2010 and 2009, respectively. Royalty expense is primarily recorded in cost of sales, with a small portion recorded as research and development expense depending on the use of the technology under license. Some of these agreements also have minimum raw material purchase requirements and requirements to perform specific types of research.

At December 31, 2011, we had commitments to purchase goods or services, and for future minimum guaranteed royalties. They are as follows:

$1,000 |  | Purchase Commitments |  |  | License & Royalty Commitments |
2012 |  |  | 54,686 |  |  |  | 1,600 |
2013 |  |  | 25,556 |  |  |  | 1,122 |
2014 |  |  | 496 |  |  |  | 1,222 |
2015 |  |  | — |  |  |  | 1,222 |
2016 |  |  | — |  |  |  | 1,222 |
Thereafter |  |  | — |  |  |  | 3,388 |
|  |  | 80,738 |  |  |  | 9,776 |

176 |  | QIAGEN Annual Report 2011

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

Contingent Consideration Commitments

Pursuant to the purchase agreements for certain acquisitions, as discussed more fully in Note 4, we could be required to make additional contingent cash payments totaling up to $103.1 million based on the achievement of certain revenue and operating results milestones as follows: $26.5 million in 2012, $11.1 million in 2013 , $12.3 million in 2014, $4.7 million in 2015, $6.4 million in 2016, and $42.1 million, payable in any 12-month period from now until 2016 based on the accomplishment of certain revenue targets, the launch of certain products or the grant of certain patent rights. Of the $103.1 million total contingent obligation, approximately $39.8 million is accrued as of December 31, 2011. We reassessed the fair value of the contingent consideration as of December 31, 2011, the result of which was not materially different from the fair value determined as of the date of the acquisitions.

Employment Agreements

Certain of our employment contracts contain provisions which guarantee the payments of certain amounts in the event of a change in control, as defined in the agreements, or if the executive is terminated for reasons other than cause, as defined in the agreements. At December 31, 2011, the commitment under these agreements totaled $19.2 million.

Contingencies

In the ordinary course of business, we provide a warranty to customers that our products are free of defects and will conform to published specifications. Generally, the applicable product warranty period is one year from the date of delivery of the product to the customer or of site acceptance, if required. Additionally, we typically provide limited warranties with respect to our services. From time to time, we also make other warranties to customers, including warranties that our products are manufactured in accordance with applicable laws and not in violation of third-party rights. We provide for estimated warranty costs at the time of the product sale. We believe our warranty reserves as of December 31, 2011 and 2010 appropriately reflect the estimated cost of such warranty obligations.

Preacquistion Contingencies

In connection with certain acquisitions, amounts were paid into escrow accounts to cover preacquistion contingencies assumed in the acquisition. The escrow amounts expected to be claimed by QIAGEN are recorded as an asset in prepaid and other expenses and amount to $7.0 million as of December 31, 2011 ($27.0 million as of December 31, 2010). In addition, we have recorded $6.2 million for preacquistion contingencies as a liability under accrued and other liabilities as of December 31, 2011 ($28.7 million as of December 31, 2010).

Litigation

From time to time, QIAGEN may be party to legal proceedings incidental to its business. As of December 31, 2011, certain claims, suits or legal proceedings arising out of the normal course of business have been filed or were pending against QIAGEN or its subsidiaries. These matters have arisen in the ordinary course and conduct of business, as well as through acquisition. Although it is not possible to predict the outcome of such litigation, based on the facts known to QIAGEN and after consultation with legal counsel, management believes that such litigation will not have a material adverse effect on QIAGEN’s financial position or results of operations.

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QIAGEN Sciences, Inc. vs. Operon Biotechnologies, Inc.

On July 2, 2009, Operon Biotechnologies, Inc. (Operon) commenced arbitration against QIAGEN Sciences, Inc. asserting a breach of a supply agreement between the parties and seeking monetary damages. Operon asserted that QIAGEN failed to comply with the preferred supplier provisions of the agreement and that this breach caused damages, including lost profits. QIAGEN denied the allegations and asserted counterclaims. The dispute was submitted to an arbitration panel and in June 2011 the arbitration panel concluded in favor of QIAGEN on all claims. As a result, in 2011, Operon paid QIAGEN approximately $ 2.1 million for past-due receivables, interest and legal fees.

Cybeles Life Science Consulting (Claimant) vs. Research Biolabs Ptd. Ltd. (Respondent)

On August 18, 2010, Cybeles Life Science Consulting (Cybeles) initiated an arbitration proceeding against QIAGEN’s Singaporean affiliate Research Biolabs Pte. Ltd. (Research Biolabs) in the Swiss Chambers’ Court of Arbitration and Mediation. The Notice of Arbitration alleged breaches of the distribution agreement between the parties, and claimed loss and damage in the amount of approximately $ 1.3 million. Research Biolabs considers the complaint as not justified and will continue to vigorously defend the claim.

19. | Employee Benefit Plans

We maintain various benefit plans, including defined contribution and defined benefit plans. Our U.S. defined contribution plan is qualified under Section 401(k) of the Internal Revenue Code, and covers substantially all U.S. employees. Participants may contribute a portion of their compensation not exceeding a limit set annually by the Internal Revenue Service. This plan includes a provision for us to match a portion of employee contributions. Total expense under the 401(k) plans, including the plans acquired via business acquisitions, was $ 2.3 million, $ 2.1 million and $ 2.0 million for the years ended December 31, 2011, 2010 and 2009, respectively. We also have a defined contribution plan which covers certain executives. We make matching contributions up to an established maximum. Matching contributions made to the plan, and expensed, totaled approximately $ 0.3 million in each year ended December 31, 2011, 2010 and 2009.

We have four defined benefit, non-contributory retirement or termination plans that cover certain employees in Germany, France, Japan and Italy. These defined benefit plans provide benefits to covered individuals satisfying certain age and service requirements. For certain plans, we calculate the vested benefits to which employees are entitled if they separate immediately. The benefits accrued on a pro-rata basis during the employees’ employment period are based on the individuals’ salaries, adjusted for inflation. The liability under the defined benefit plans was $ 2.9 million at December 31, 2011, and $ 2.4 million at December 31, 2010, and is included as a component of other long-term liabilities on the consolidated balance sheets.

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

20. | Related Party Transactions

In 2011 and 2010, we had a consulting agreement with Dr. Metin Colpan, our former Chief Executive Officer and current Supervisory Board member, pursuant to which Dr. Colpan is paid a fee of €2,750 per day for consulting services, subject to adjustment. We incurred consulting expenses of approximately $0.1 million and $0.3 million in December 31, 2011 and 2010, respectively, for scientific consulting services under this agreement. In January 2012, the agreement under which Dr. Colpan provided scientific consulting services was terminated.

We have a 100% interest in QIAGEN Finance (Luxembourg) S.A. (QIAGEN Finance) and QIAGEN Euro Finance (Luxembourg) S.A. (Euro Finance), which were established for the purpose of issuing convertible debt. As discussed in Note 12, QIAGEN Finance and Euro Finance are variable interest entities with no primary beneficiary, thus they are not consolidated. Accordingly, the convertible debt is not included in the consolidated statements of QIAGEN N.V., though QIAGEN N.V. does report the full obligation of the debt through its liabilities to QIAGEN Finance and Euro Finance. As of December 31, 2011 and 2010, we had loans payable to QIAGEN Finance of $145.0 million and accrued interest due to QIAGEN Finance of $4.4 million and $3.3 million, respectively. We also had amounts receivable from QIAGEN Finance of $3.4 million and $2.3 million, respectively. As of December 31, 2011 and 2010, we have a loan payable to Euro Finance of $300.0 million, accrued interest due to Euro Finance of $3.0 million and amounts receivable from Euro Finance of $1.6 million. The amounts receivable are related to subscription rights which are recorded net in the equity of QIAGEN N.V. as paid-in capital.

From time to time, we have transactions with other companies in which we hold an interest all of which are individually and in the aggregate immaterial, as summarized in the table below.

Years ended December 31 $1,000 |  | 2011 |  |  | 2010 |
Net sales |  |  | 6,287 |  |  |  | 2,605 |
Loans receivable |  |  | 1,539 |  |  |  | 1,560 |
Accounts receivable |  |  | 3,606 |  |  |  | 2,400 |
Accounts payable |  |  | 4,642 |  |  |  | 1,755 |

21. | Segment Information

Considering the acquisitions made during 2011, we determined that we still operate as one business segment in accordance with ASC Topic 280, Segment Reporting. As a result of our continued restructuring and streamlining of the growing organization, and with revised internal budgeting and reporting approaches, our chief operating decision maker (CODM) makes decisions with regard to business operations and resource allocation based on evaluations of QIAGEN as a whole. Accordingly, we operate as one business segment. Summarized product category and geographic information is shown in the tables below.

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Product Category Information

Net sales for the product categories are attributed based on those revenues related to sample and assay products and similarly related revenues, and revenues derived from instrumentation sales.

$1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Consumables and Related Revenues |  |  | 1,011,863 |  |  |  | 937,714 |  |  |  | 870,216 |
Instrumentation |  |  | 157,884 |  |  |  | 149,717 |  |  |  | 139,609 |
Total |  |  | 1,169,747 |  |  |  | 1,087,431 |  |  |  | 1,009,825 |

Geographical Information

Net sales are attributed to countries based on the location of the subsidiary generating the sale. QIAGEN operates manufacturing facilities in Germany, Switzerland, China, the United Kingdom, France and the United States that supply products to other countries. The sales from these manufacturing operations to other countries are included in the Net Sales of the countries in which the manufacturing locations are based. The intersegment portions of such net sales are excluded to derive consolidated net sales. No single customer represents more than ten percent of consolidated net sales. Our official country of domicile is the Netherlands, which reported net sales of $23.9 million, $21.5 million and $20.3 million for the years ended 2011, 2010 and 2009, respectively, and these amounts are included in the line item Europe as shown in the table below.

$1,000 |  | 2011 |  |  | 2010 |  |  | 2009 |
Net sales |  |  |  |  |  |  |  |  |  |  |  |
Americas: |  |  |  |  |  |  |  |  |  |  |  |
United States |  |  | 466,502 |  |  |  | 472,682 |  |  |  | 446,151 |
Other Americas |  |  | 55,137 |  |  |  | 50,912 |  |  |  | 47,995 |
Total Americas |  |  | 521,639 |  |  |  | 523,594 |  |  |  | 494,146 |
Europe |  |  | 444,441 |  |  |  | 398,029 |  |  |  | 363,949 |
Asia Pacific & Rest of World |  |  | 203,667 |  |  |  | 165,808 |  |  |  | 151,730 |
Total |  |  | 1,169,747 |  |  |  | 1,087,431 |  |  |  | 1,009,825 |

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FINANCIAL RESULTS Notes to Consolidated Financial Statements

Long-lived assets include property, plant and equipment. The Netherlands, which is included in the balances for Europe, reported long-lived assets of $1.1 million and $0.5 million for the years ended 2011 and 2010, respectively.

$1,000 |  | 2011 |  |  | 2010 |
Long-lived assets |  |  |  |  |  |  |  |
Americas: |  |  |  |  |  |  |  |
United States |  |  | 98,717 |  |  |  | 100,342 |
Other Americas |  |  | 2,579 |  |  |  | 2,154 |
Total Americas |  |  | 101,296 |  |  |  | 102,496 |
Europe |  |  | 259,220 |  |  |  | 231,405 |
Asia Pacific & Rest of World |  |  | 11,276 |  |  |  | 11,763 |
Total |  |  | 371,792 |  |  |  | 345,664 |

QIAGEN N.V. AND SUBSIDIARIES SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

For the years ended December 31, 2011, 2010 and 2009 $1,000 |  | Balance at Beginning of Year |  |  | Provision Charged to Expense |  |  | Write-Offs |  |  | Foreign Exchange and Other |  |  | Balance at End of Year |
Year ended December 31, 2009: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  |  | 3,070 |  |  |  | 1,705 |  |  |  | (562 | ) |  |  | (811 | ) |  |  | 3,402 |
Year ended December 31, 2010: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  |  | 3,402 |  |  |  | 1,444 |  |  |  | (771 | ) |  |  | (848 | ) |  |  | 3,227 |
Year ended December 31, 2011: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  |  | 3,227 |  |  |  | 2,131 |  |  |  | (593 | ) |  |  | (450 | ) |  |  | 4,315 |

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List of Subsidiaries

The following is a list of subsidiaries as of December 31, 2011, other than certain subsidiaries that did not in the aggregate constitute a significant subsidiary

Company Name |  | Jurisdiction of Incorporation
Cellestis Limited |  | Australia
Cellestis GmbH |  | Germany
Corbett Research Ltd Pty |  | Australia
Ipsogen SA |  | France
QIAGEN Australia Holding |  | Australia
QIAGEN Inc. (Canada) |  | Canada
QIAGEN Deutschland Holding GmbH |  | Germany
QIAGEN Gaithersburg, Inc. |  | Delaware
QIAGEN GmbH |  | Germany
QIAGEN Hamburg GmbH |  | Germany
QIAGEN, U.S. Finance Holdings |  | Luxembourg
QIAGEN, Finance (MALTA) Ltd |  | Malta
QIAGEN, Inc. (USA) |  | California
QIAGEN Instruments AG |  | Switzerland
QIAGEN K.K. |  | Japan
QIAGEN Lake Constance GmbH |  | Germany
QIAGEN Ltd. |  | U.K.
QIAGEN Manchester Ltd. |  | U.K.
QIAGEN Mexico |  | Mexico
QIAGEN North American Holdings Inc. |  | California
QIAGEN Pty. Ltd. |  | Australia
QIAGEN SA |  | France
QIAGEN Sciences, LLC |  | Maryland
QIAGEN Shenzhen Co. Ltd. |  | China
QIAGEN SpA |  | Italy
Quanta Biosciences, Inc. |  | Maryland
SABiosciences |  | Maryland

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FINANCIAL RESULTS Notes to Consolidated Financial Statements | Auditor’s Report

Report of Independent Registered Public Accounting Firm

The Supervisory Board and Shareholders of QIAGEN N.V. and Subsidiaries

We have audited the accompanying consolidated balance sheets of QIAGEN N.V. and Subsidiaries as of December 31, 2011 and 2010, and the related consolidated statements of income, comprehensive income, equity and cash flows for each of the three years in the period ended December 31, 2011. Our audits also included the financial statement schedule listed in the Index at Item 18(A). These financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of QIAGEN N.V. and Subsidiaries at December 31, 2011 and 2010, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2011, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), QIAGEN N.V. and Subsidiaries’ internal control over financial reporting as of December 31, 2011, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 26, 2012, expressed an unqualified opinion thereon.

Ernst &Young GmbH
Wirtschaftsprüfungsgesellschaft

March 26, 2012

Mannheim, Germany

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Report of Independent Registered Public Accounting Firm

The Supervisory Board and Shareholders of QIAGEN N.V. and Subsidiaries

We have audited QIAGEN N.V. and Subsidiaries’ internal control over financial reporting as of December 31, 2011, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). QIAGEN N.V. and Subsidiaries’ management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Report of Management on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, QIAGEN N.V. and Subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2011, based on the COSO criteria.

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FINANCIAL RESULTS Auditor’s Report

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of QIAGEN N.V. and Subsidiaries as of December 31, 2011 and 2010, and the related consolidated statements of income, comprehensive income, equity and cash flows for each of the three years in the period ended December 31, 2011, of QIAGEN N.V. and Subsidiaries and our report dated March 26, 2012, expressed an unqualified opinion thereon.

Ernst & Young GmbH

Wirtschaftsprüfungsgesellschaft

March 26, 2012

Mannheim, Germany

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QIAGEN KEY FIGURES

QIAGEN KEY FIGURES

$1,000 except per share data Results |  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2008 |
Net sales |  |  | 1,169,747 |  |  |  | 1,087,431 |  |  |  | 1,009,825 |  |  |  | 892,975 |
Operating income |  |  | 99,588 |  |  |  | 188,537 |  |  |  | 180,205 |  |  |  | 145,662 |
Net income* |  |  | 96,038 |  |  |  | 144,311 |  |  |  | 137,767 |  |  |  | 89,033 |
Basic earnings per share (EPS) * |  |  | 0.41 |  |  |  | 0.62 |  |  |  | 0.67 |  |  |  | 0.45 |
Diluted earnings per share (EPS)* |  |  | 0.40 |  |  |  | 0.60 |  |  |  | 0.64 |  |  |  | 0.44 |
Number of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares used to compute basic net income per common share |  |  | 233,850 |  |  |  | 232,635 |  |  |  | 206,928 |  |  |  | 196,804 |
Weighted average number of common shares used to compute diluted net income per common share |  |  | 239,064 |  |  |  | 240,483 |  |  |  | 213,612 |  |  |  | 204,259 |
Cash flow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash flow from operations |  |  | 244,779 |  |  |  | 250,752 |  |  |  | 216,995 |  |  |  | 172,998 |
Capital expenditures for property, plant and equipment |  |  | 86,805 |  |  |  | 79,667 |  |  |  | 52,179 |  |  |  | 39,448 |
Free cash flow (Cash flow from operations less capital expenditures) |  |  | 157,974 |  |  |  | 171,085 |  |  |  | 164,816 |  |  |  | 133,550 |
Cash EPS (Cash flow from operations / weighted average number of diluted shares) |  |  | 1.02 |  |  |  | 1.04 |  |  |  | 1.02 |  |  |  | 0.85 |
Balance sheet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  | 3,756,453 |  |  |  | 3,913,995 |  |  |  | 3,796,464 |  |  |  | 2,885,323 |
Cash and cash equivalents |  |  | 221,133 |  |  |  | 828,407 |  |  |  | 825,557 |  |  |  | 333,313 |
Total long-term liabilities, including current portion |  |  | 722,621 |  |  |  | 1,125,070 |  |  |  | 1,183,182 |  |  |  | 1,197,088 |
Total equity* |  |  | 2,548,304 |  |  |  | 2,476,353 |  |  |  | 2,291,169 |  |  |  | 1,453,844 |

* | Attributable to the owners of QIAGEN N.V.

186 |  | QIAGEN Annual Report 2011

##### Table of Contents

SERVICE QIAGEN Key Figures

|  | As of December 31 |
|  | 2007 |  |  | 2006 |  |  | 2005 |  |  | 2004 |  |  | 2003 |  |  | 2002 |
|  |  | 649,774 |  |  |  | 465,778 |  |  |  | 398,395 |  |  |  | 380,629 |  |  |  | 351,404 |  |  |  | 298,607 |
|  |  | 83,133 |  |  |  | 100,601 |  |  |  | 94,837 |  |  |  | 84,140 |  |  |  | 68,889 |  |  |  | 43,185 |
|  |  | 50,122 |  |  |  | 70,539 |  |  |  | 62,225 |  |  |  | 48,705 |  |  |  | 42,850 |  |  |  | 23,142 |
|  |  | 0.30 |  |  |  | 0.47 |  |  |  | 0.42 |  |  |  | 0.33 |  |  |  | 0.29 |  |  |  | 0.16 |
|  |  | 0.28 |  |  |  | 0.46 |  |  |  | 0.41 |  |  |  | 0.33 |  |  |  | 0.29 |  |  |  | 0.16 |
|  |  | 168,457 |  |  |  | 149,504 |  |  |  | 147,837 |  |  |  | 146,658 |  |  |  | 145,832 |  |  |  | 144,795 |
|  |  | 175,959 |  |  |  | 153,517 |  |  |  | 150,172 |  |  |  | 148,519 |  |  |  | 147,173 |  |  |  | 145,787 |
|  |  | 84,811 |  |  |  | 101,479 |  |  |  | 91,237 |  |  |  | 53,798 |  |  |  | 64,060 |  |  |  | 36,686 |
|  |  | 34,492 |  |  |  | 28,995 |  |  |  | 13,728 |  |  |  | 12,621 |  |  |  | 19,558 |  |  |  | 59,136 |
|  |  | 50,319 |  |  |  | 72,484 |  |  |  | 77,509 |  |  |  | 41,177 |  |  |  | 44,502 |  |  |  | (22,450 | )
|  |  | 0.48 |  |  |  | 0.66 |  |  |  | 0.61 |  |  |  | 0.36 |  |  |  | 0.44 |  |  |  | 0.25 |
|  |  | 2,775,174 |  |  |  | 1,212,012 |  |  |  | 765,298 |  |  |  | 714,599 |  |  |  | 551,930 |  |  |  | 454,511 |
|  |  | 347,320 |  |  |  | 430,357 |  |  |  | 191,700 |  |  |  | 196,375 |  |  |  | 98,993 |  |  |  | 44,893 |
|  |  | 1,220,084 |  |  |  | 536,738 |  |  |  | 230,086 |  |  |  | 234,138 |  |  |  | 131,095 |  |  |  | 112,331 |
|  |  | 1,391,575 |  |  |  | 566,165 |  |  |  | 450,457 |  |  |  | 400,376 |  |  |  | 334,786 |  |  |  | 263,031 |

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GLOSSARY

A

Amplification Making multiple copies of nucleic acid sequences to enable analysis for diagnostic or identification purposes. Various technologies are used to amplify genomic information in the laboratory, the most popular being the Polymerase Chain Reaction (PCR).

Applied Testing Use of Sample & Assay Technologies for professional applications beyond healthcare and research, including human identification and forensics, veterinary testing, food safety and other uses in non-human health applications.

B

Biomarker Molecules found in the body that indicate a specific biological condition such as a disease, predisposition to a disease, or probable response to drugs, which are increasingly used to personalize medical treatments for various conditions.

Biomedical research Scientific investigation of any matter related to living or biological systems. “Biomedical” usually denotes an emphasis on problems related to human health and diseases.

Bioprocessing Use of biological materials such as cells in culture or enzymes to manufacture products – for example, pharmaceutical companies’ use of recombinant DNA technology to produce protein-based therapeutics.

C

CE mark A mandatory mark, officially called “CE marking,” that designates products as meeting safety, health and environmental requirements for the European Economic Area (EEA). The CE mark is a precondition to market products that can be used for in vitro diagnostics in Europe, and is also accepted by many other countries outside of Europe.

Clinical trial A research study involving patients or human subjects. The most common clinical trials evaluate new drugs, medical devices, biologics or other patient interventions in scientifically controlled settings, and are required for regulatory approval of new therapies or diagnostics.

Companion diagnostics A key tool for personalized medicine. Companion diagnostics are tests administered ahead of, or in combination with, individual drug therapies, allowing physicians to assess the likely outcome and safety, and eliminating a “trial and error” approach to treatment of disease.

CT Chlamydia trachomatis, a disease-causing bacteria. Chlamydia infections are the most common bacterial sexually transmitted infections in humans and are the leading cause of infectious blindness worldwide.

Cytology Study of cells and their structure, function, multiplication and pathology.

D

DNA Deoxyribonucleic acid is a molecule seen as a basic building block of life. It contains genetic information including the instructions needed for an organism to develop, survive and reproduce. In DNA, two strands form a double helix structure built up from the four nucleotides, or “bases,” adenine, cytosine, thymine and guanine (A, C, T and G).

DNA methylation A type of chemical modification, where DNA acts as an “on” and “off” switch for individual genes. Methylation patterns can be analyzed to diagnose conditions and determine the presence or absence of disease.

DNA sequencing The process used to obtain the sequential DNA arrangement of the nucleotides, or “bases,” A, C, G and T. The DNA sequence carries information that a cell needs to assemble protein and RNA molecules and is important in investigating the functions of genes.

Drug metabolism The chemical alteration of a drug by the body.

Drug target The biological target for a medicine to act in the body and fight disease.

E

EGFR The epidermal growth factor receptor, which has been shown to play an important role in certain cancers and is the target of new anticancer drugs known as EGFR inhibitors.

Epigenetics A research area devoted to the analysis of hereditary factors that may have an impact on the phenotype of an organism or its gene expression, but are not associated with changes in the underlying DNA sequence. A key mechanism in epigenetics is DNA methylation.

F

FDA The Food and Drug Administration is an agency of the U.S. Department of Health and Human Services responsible for regulating drugs, medical devices, biologicals such as vaccines, food, dietary supplements, blood products, radiation-emitting devices, veterinary products and cosmetics in the United States.

Forensics Application of scientific techniques to legal matters – for example, analysis of physical evidence from crime scenes or use of DNA evidence for identification of victims or perpetrators.

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##### Table of Contents

SERVICE Glossary

Functional genomics Study of genes, their resulting proteins and the functions of specific proteins in the body.

G

GC Gonococcus, or Neisseria gonorrhoeae, is a species of Gram-negative bacteria responsible for the sexually transmitted disease gonorrhea.

Gene expression Transfer of genetic information to its active form, usually from DNA via RNA (transcription) into proteins (translation).

Gene silencing Repression of gene expression, especially using the recently discovered mechanism of RNAi (RNA interference). siRNA duplexes can be designed to target and repress expression of specific genes.

Genetic modification (GM) The process of manipulating genes, usually outside the organism’s normal reproductive process, to obtain different characteristics, for example in genetically modified foods.

Genome The entire genetic information of an organism. In most organisms it consists of DNA; in some viruses it can consist of RNA.

Genomic DNA A representative sample of DNA contained in a genome.

Genomics Scientific study of genes and their role in an organism’s structure, growth, health, disease, ability to resist disease, etc.

Genotyping Genetic fingerprinting, DNA testing, DNA typing, and DNA profiling – study or testing of variations in the genetic information among different individuals.

H

HDA Helicase-dependent amplification is an amplification technology for nucleic acids working at constant temperatures, unlike changing temperatures involved in PCR.

High-throughput screening Testing of large numbers of samples, often simultaneously.

HLA Human leukocyte antigen is a gene product of the major histocompatibility complex that influences immune response. These antigens play an important role in human organ transplantation, transfusions in refractory patients and certain disease associations.

HPV A virus identified as a necessary factor in the development of nearly all cases of cervical cancer in women. Approximately 130 human papillomavirus (HPV) types have been identified. Persistent infection with one of 15 “high-risk” subtypes of sexually transmitted HPV may lead to potentially precancerous lesions and can progress to invasive cancer.

Hybrid capture technology Proprietary technology used to detect various infections such as HPV, chlamydia trachomatis (CT), neisseria gonorrhea (GC) and cytomegalovirus (CMV). In “hybrid capture,” RNA probes bind to DNA in the targeted virus or bacterium, forming a “hybrid.” This hybrid is then “captured” by an antibody added to the solution. In a later step, additional antibodies that produce light in the presence of hybrids are introduced. They bind to the hybrids, resulting in the emission of light that is measured by an instrument called a luminometer. The amount of light detected indicates the amount of target DNA present.

I

Immunoassay Biochemical test that measures concentration of a specific antibody in a biological liquid, typically serum or urine, using the reaction of an antibody or antibodies to its antigen. The assay takes advantage of the specific binding of an antibody to its antigen.

In vitro diagnostics These tests, known as IVD, are medical devices intended to perform diagnoses from assays in a laboratory test tube, or more generally in a controlled environment outside a living organism. In Latin, in vitro means “in glass.”

K

KRAS The KRAS gene (short for Kirsten rat sarcoma viral oncogene homolog) encodes a protein also known as KRAS that is involved in regulating cell division. While the protein product of the unmutated KRAS gene performs an essential function in normal tissue signaling, mutated KRAS genes are potent oncogenes that play a role in many cancers.

L

Latent TB Condition of being infected with the tuberculosis bacterium but suffering no active disease or symptoms. About one-third of the world’s population is estimated to have latent TB, and most will not show any symptoms. About 5% –10% of these patients, however, eventually develop active tuberculosis during their lifetime, a potentially lifethreatening and highly contagious disease.

M

Metabolic enzyme A protein that catalyzes biochemical reactions for the synthesis, modification and breakdown of molecules (e.g., drugs) in a living organism. The metabolic enzyme pattern differs among individuals and provides a basis for analyzing individual drug responses in patients.

Metabolic markers A molecular marker associated with a metabolic function.

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MicroRNAs (miRNAs) Single-stranded RNA molecules about 21–23 nucleotides in length, which regulate gene expression. miRNAs are encoded by genes that are transcribed from DNA but not translated into proteins (non-coding RNA).

Molecular biology The study of life processes at the molecular level, typically through the study of nucleic acids (DNA and RNA) and proteins.

Molecular diagnostics The use of DNA, RNA and proteins to test for specific health conditions in humans.

Multiplex assay A type of laboratory procedure that performs multiple assays concurrently.

N

Nucleic acid Single or double-stranded polynucleotides involving RNA or DNA, which are the crucial building blocks of life involved in storage and expression of genetic information.

O

Oncogene An oncogene is a gene that, when mutated or expressed at high levels, helps turn a normal cell into a tumor cell. Examples are PI3K, BRAF, KRAS, BCL-ABL.

Optical fluorescence detection technology A technique using optical measurement to quantify and analyze light emissions specific to molecular interactions in a variety of diagnostic and other applications.

P

Pap smear The Papanicolaou test (also called Pap smear, Pap test, cervical smear, or smear test) is a cytology-based screening test used to detect premalignant and malignant (cancerous) processes in the cervix.

Pathogen A pathogen or infectious agent is a biological agent that causes disease or illness.

Pathway A series of metabolic / biological actions among molecules in a cell. An understanding of entire pathways and the complex interactions of all molecules involved – as opposed to the study of individual molecules – is a key to understanding the specifics of many diseases and the development of new diagnostics and drugs.

PCR Polymerase chain reaction is the most widely used laboratory technique to amplify DNA or RNA sequences. The temperature of a sample is repeatedly raised and lowered to help heat-stable polymerase enzymes copy the target nucleic acid sequence. PCR can produce a billion copies of the target sequence in a few hours.

Personalized medicine Use of information from a patient’s genotype, level of gene expression and other clinical data to stratify disease, select a medication or dosage, or initiate a therapeutic or preventive measure that is particularly suited to that patient at the time of administration.

Pharmacogenetics Study of the association between specific genetic characteristics and response to drug therapy to select “the right medicine for the right patient.”

Pharmacogenomics Analyzing the entire spectrum of genes that determine drug behavior and sensitivity, pharmacogenomics is concerned with genetic effects on drugs themselves, and with genetic variances that contribute to variable effects of drugs in different individuals.

Polymerases Enzymes that catalyze the production of a nucleic acid strand using an existing strand as a template – used in PCR and RT-PCR.

Predisposition A genetic effect that influences the observable characteristics of an organism but can be modified by environmental conditions. Genetic testing can identify individuals who are genetically predisposed to certain health problems.

Primer A strand of nucleic acid that serves as a starting point for DNA or RNA synthesis. They are required because the enzymes that catalyze replication, DNA polymerases, can only add new nucleotides to an existing strand of DNA.

Pyrosequencing A next-generation DNA sequencing technology based on the “sequencing by synthesis” principle. Pyrosequencing enables decoding of short to medium-length DNA sequences and is highly useful for analyzing DNA methylation patterns.

Q

QuantiFERON Proprietary “pre-molecular” technology that uses the immune system’s own memory to provide information on latent infections, where pathogens are present in such low amounts that they are not detectable with DNA-based testing or other methods. QIAGEN acquired the QuantiFERON products and technology with the acquisition of Cellestis Ltd. in 2011.

R

Real-time PCR Polymerase chain reaction in real time that involves the sequence-specific amplification of DNA molecules using heat-stable polymerase enzymes. It is often used to measure the amount of a specific DNA molecule in a sample.

RNA Ribonucleic acid is one of the building blocks of life, included in many types of biologically relevant molecules, especially mRNA (messenger RNA), which is copied from DNA and encodes proteins.

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##### Table of Contents

SERVICE Glossary

RNAi RNA interference is one methodology used to cause gene silencing.

RT-PCR Reverse-transcriptase polymerase chain reaction is a technique that transcribes RNA molecules into DNA molecules, which are then amplified by PCR.

S

SARS Severe acute respiratory syndrome is an atypical pneumonia, caused by the SARS coronavirus (SARS CoV), a novel coronavirus.

Sensitivity A statistical measure of how well a test correctly identifies a condition. For example, sensitivity in a medical test to determine if a person has a certain disease is the probability that if the person has the disease, the test result will be “positive.” High sensitivity is required when early diagnosis and treatment are beneficial to patients, or when a disease is infectious and screening is needed to contain it.

siRNA Short interfering RNA is a specific short sequence of double-stranded RNA (dsRNA) with less than 30 base pairs.

SNP Single nucleotide polymorphism – DNA sequence variations occurring when a single nucleotide (A, C, T or G) in the genome differs between members of a species. Variations in DNA sequences can affect how humans develop diseases and respond to pathogens, drugs, vaccines and other agents, and thus serve as potential biomarkers. SNPs are thought to be key enablers in achieving the potential of personalized medicine.

Specificity A statistical measure of how well a test correctly identifies the negative cases, those that do not meet the condition under study. For example, specificity in a medical test to determine if a person has a certain disease is the probability that a “negative” result accurately indicates that the person does not have the disease. High specificity is important when the treatment or diagnosis could be harmful to patients, mentally and / or physically.

Swine flu Any strain of the influenza virus that can be endemic in pigs (swine), and also found in humans. The 2009–2010 pandemic in humans, widely known as “swine flu” or “H1N1,” was due to a strain of influenza. A virus subtype H1N1 that global health authorities viewed as a particularly dangerous threat.

W

Workflow An orderly series of steps a laboratory must follow to take a sample from raw biological material through isolation and purification, identification and measurement by molecular assays, on to analysis and through final results. Automation systems increasingly move beyond individual lab tasks to focus on enhancing the efficiency of entire workflows.

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##### Table of Contents

SERVICE

CORPORATE COMMUNICATIONS

FOR INVESTORS

Phone worldwide: + 49 2103 29 11711

Phone U.S.: + 1 240 686 2222

Email: ir@qiagen.com

FOR MEDIA

Phone worldwide: + 49 2103 29 11826

Phone U.S.: + 1 240 686 7425

Email: pr@qiagen.com

QUAGEN IN THE INTERNET

www.qiagen.com

CREDITS

CONCEPT AND DESIGN

3st kommunikation, Mainz

PHOTOGRAPHY

Andreas Fechner (pages 2, 3, 14-64)

Michael Dannenmann (pages 4, 70, 71)

Antonia Nahas (page 9)

PUBLICATION DATE

Published on March 30, 2012,

by QIAGEN N.V.

FINANCIAL CALENDAR

APRIL 25, 2012

First Quarter 2012 Results

JUNE 27, 2012

Annual General Meeting

JULY 24, 2012

Second Quarter 2012 Results

OCTOBER 29, 2012

Third Quarter 2012 Results

JANUARY 2013

Fourth Quarter 2012 Results

TRADEMARKS

Our name together with our logo is registered as a trademark in the United States and a number of other countries: QIAGEN®.

For a complete list of QIAGEN’s trademarks and disclaimers, please refer to QIAGEN’s webpage under http://www.qiagen.com/ trademarks_disclaimers.aspx

In this annual report QIAGEN is using the term molecular diagnostics. The use of this term is in reference to certain countries, such as the United States, limited to products subject to regulatory requirements. As of February 2012, QIAGEN molecular diagnostics products included 7 FDA (PMA approved or 510K cleared) products, 16 clinical sample concentrator products (12 kits and 4 instruments), 61 EU CE IVD assays (from QIAGEN GmbH, QIAGEN Gaithersburg Inc, QIAGEN Manchester Ltd), 9 EU CE IVD sample preparation products, 20 EU CE IVD instruments for sample purification or detection, 8 China SFDA IVD assays and 7 China SFDA IVD instruments.

This Annual Report may also contain trade names or trademarks of companies other than QIAGEN.

© 2012 QIAGEN, all rights reserved.

192 |  | QIAGEN Annual Report 2011

##### Table of Contents

QIAGEN N.V., VENLO, THE NETHERLANDS

Annual Report 2011

##### Table of Contents

QIAGEN N.V.

Annual Report 2011 |  |  |  |
Report of the Supervisory Board |  |  | 1 |
Management Report |  |  | 4 |
Corporate Governance Report |  |  | 58 |
Corporate Governance Statement |  |  | 78 |
Responsibility Statement of the Management Board |  |  | 79 |
Consolidated Financial Statements QIAGEN N.V. and Subsidiaries |  |  |  |
Consolidated Statement of Financial Position |  |  | F-1 |
Consolidated Income Statement |  |  | F-3 |
Consolidated Statement of Comprehensive Income |  |  | F-4 |
Consolidated Statement of Cash Flows |  |  | F-5 |
Consolidated Statement of Changes in Equity |  |  | F-6 |
Notes to the Consolidated Financial Statements |  |  | F-7 |
Financial Statements QIAGEN N.V. |  |  |  |
Statement of Financial Position and Income Statement |  |  | F-75 |
Statement of Changes in Equity |  |  | F-76 |
Notes to the Company Financial Statements |  |  | F-77 |
Other Information |  |  |  |
Appropriation of Net Income |  |  | F-82 |
Subsequent Events |  |  | F-83 |
Independent Auditor’s Report |  |  | F-84 |

Annual Report 2011

##### Table of Contents

QIAGEN N.V.

Report of the Supervisory Board

To our Shareholders

The Supervisory Board wishes to thank all QIAGEN employees and members of the Executive Committee for contributing to our achievements in 2011. We would also like to thank our shareholders, customers, business partners and other stakeholders for honouring QIAGEN with your continued collaboration and trust.

Economic events created a challenging business environment in 2011, but QIAGEN delivered growth in all customer classes and across geographic regions.

We achieved significant milestones on our strategic initiatives, and as the year progressed we began to realize accelerating total sales growth. These advances confirm our conviction that QIAGEN’s innovative new products and strategic acquisitions will deliver growing value in the coming years for customers of our Sample & Assay Technologies, and increasing returns for shareholders,

Among the year’s strategic accomplishments, QIAGEN reached an installed base of more than 550 QIAsymphony instruments, propelled by introduction of the full QIAsymphony RGQ platform. We launched new test content in each customer class and pursued regulatory approvals in the U.S. for two KRAS companion diagnostic tests to expand global markets for promising assays in Molecular Diagnostics. The full acquisition of Cellestis Ltd. and an 89% majority stake in Ipsogen S.A. added breakthrough diagnostic technologies with dynamic growth opportunities. Geographic expansion continued, especially in emerging markets as QIAGEN began direct operations in India and Taiwan. Late in the year, after intensive discussion within the Supervisory Board QIAGEN also began implementing a comprehensive project to improve productivity and enhance profitability through changes throughout the organization.

As empowered by the Dutch Corporate Governance Code, the Supervisory Board devoted considerable time in 2011 to discussing QIAGEN’s corporate strategy, main risks and opportunities, and an annual assessment by the Managing Board of the design and effectiveness of internal risk management and control systems as well as any significant changes in them.

In addition, the Supervisory Board discussed and reviewed the functioning of its committees and individual members, its current composition, competence and desired profile. The Supervisory Board came to the conclusion that it and the Managing Board were properly functioning. Following the tragic passing in October 2011 of Dr. Vera Kallmeyer, who had joined the Supervisory Board earlier in the year, we have begun to search for additional candidates in our aim to expand the profile of the Supervisory Board in terms of competences, experiences and international background.

Through its Compensation Committee, the Supervisory Board executed and monitored compliance with the Remuneration Policy approved at the Annual General Meeting held on June 14, 2005.

Compensation of Managing Board members consists of a fixed salary and variable components. Variable compensation includes one-time and annual payments linked to business performance (bonuses) as well as long-term incentives containing risk elements, such as stock options or other equity-based compensation, and pension plans. The Remuneration Policy and the various aspects of compensation, including the detailed remuneration of individual Managing Board members, are described in the Remuneration Report, which is also available on QIAGEN’s website. Information on QIAGEN’s activities was communicated by the Managing Board to the Supervisory Board through regular meetings and business reports.

The Supervisory Board has appointed an Audit Committee, a Compensation Committee and a Selection and Appointment (Nomination) Committee, each composed of Supervisory Board members, and can appoint other committees as deemed beneficial.

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QIAGEN N.V.

The Supervisory Board has approved charters pursuant to which each of the committees operates. The charters are published on QIAGEN’s website. Further detailed information on the composition of the Supervisory Board and its committees, the number of committee meetings held in 2011 and the main topics of discussion, the independence of its members and their remuneration, as well as other information on the Supervisory Board, can be found in the Corporate Governance Report, which is an integral part of this Annual Report.

The Supervisory Board met nine times during 2011 with regular attendance of the members of the Managing Board for certain agenda items. The Supervisory Board also met to review and discuss agenda items in the absence of the Managing Board members, such as to review performance and strategy as well as to discuss compensation matters. We are pleased to report very high attendance at our meetings – no member of the Supervisory Board was frequently absent from the Supervisory Board meetings in 2011. Information about the Supervisory Board members, including positions held on other boards, is included in the Corporate Governance Report.

All members of the Supervisory Board fulfill the independence criteria as defined by the Marketplace Rules of the NASDAQ Stock Market and the Dutch Corporate Governance Code, with the exception of our former CEO Dr. Metin Colpan due to his position as a consultant for QIAGEN..

QIAGEN N.V. is a company organized under the laws of the Netherlands and has an international network of subsidiaries. The Supervisory Board follows the principle of increasing shareholder value as we represent the interests of all stakeholders, including shareholders, and has always pursued the highest standards in Corporate Governance.

QIAGEN is committed to a corporate governance structure that best suits its business and stakeholders, and that complies with relevant rules and regulations. Since 1997, QIAGEN has endorsed the recommendations made in the report of the Netherlands Committee on Corporate Governance, which was replaced by the Dutch Corporate Governance Code effective January 1, 2004, and amended and restated effective January 1, 2009. Our policy is to follow the guidelines of Good Practice of Corporate Governance as described in the Dutch Corporate Governance Code, although some minor deviations may result from the impact of factors such as legal requirements imposed on QIAGEN or industry standards.

QIAGEN is also subject to the rules regarding Corporate Governance set by NASDAQ, where our common shares have been listed since 1996. In addition, QIAGEN has adopted the standards set by the Corporate Governance Code of Germany, where our common shares have been listed since 1997. QIAGEN provides detailed disclosure in the Corporate Governance Report regarding compliance with the German and Dutch Corporate Governance Codes.

QIAGEN believes all of our operations are carried out in accordance with legal frameworks, including Dutch Corporate Law, U.S. laws and regulations, and the laws of the German capital market, in particular the Wertpapierhandelsgesetz.

QIAGEN’s common shares are registered and traded in the U.S. on the NASDAQ Global Select Market and in Germany on the Frankfurt Stock Exchange in the Prime Standard segment. Shareholders in the U.S. and Europe hold the majority of common shares. Among topics the Supervisory Board discussed during 2011 were strategies for allocation of capital to enhance returns to shareholders. In 2011, shareholders authorized the Managing Board, subject to approval of the Supervisory Board, to repurchase common shares through December 31, 2012. The Supervisory Board continues to actively consider its options.

In this Annual Report, the financial statements for 2011 are presented as prepared by the Managing Board, audited by Ernst & Young Accountants LLP, and examined and approved by the Supervisory Board.

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QIAGEN N.V.

The term of office for the members of the Supervisory Board expires as of the close of the Annual General Meeting of Shareholders of QIAGEN N.V., which is scheduled for June 27, 2012. All members of the Supervisory Board will stand for re-election at this meeting: Prof. Dr. Detlev H. Riesner, Dr. Werner Brandt, Dr. Metin Colpan, Erik Hornnaess, Prof. Dr. Manfred Karobath, Elizabeth E. Tallett and Heino von Prondzynski. The Supervisory Board also plans to propose during the Joint Meeting of members of the Supervisory Board and Managing Board that the members of the Managing Board be re-elected at this Annual General Meeting.

Venlo, the Netherlands, April 2012

Prof. Dr. Detlev H. Riesner

Chairman of the Supervisory Board

In Memoriam: Dr. Vera Kallmeyer

Dr. Vera Kallmeyer, a member of the QIAGEN Supervisory Board, passed away on October 21, 2011.

Dr. Kallmeyer, a consulting professor in the Department of Neurosurgery at the Stanford University School of Medicine and founding partner of the investment and consulting firm Equity4Health LLC, joined the Supervisory Board and Audit Committee earlier in 2011. She quickly brought fresh scientific and business perspectives to QIAGEN before her life was unfortunately cut short. With M.D., Ph.D. and M.B.A. degrees, Dr. Kallmeyer had deep experience and was an international thought leader in entrepreneurial healthcare businesses. She taught at Stanford on biomedical innovation, translational medicine and entrepreneurship.

During the short time Dr. Kallmeyer was with us, QIAGEN benefited from her rich insights and her friendship on the Supervisory Board.

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QIAGEN N.V.

Management Report

Company overview

QIAGEN is the world’s leading provider of Sample & Assay Technologies. Our products and systems are playing a pivotal role in the biology revolution by empowering customers to transform raw biological samples into valuable molecular information. QIAGEN technologies allow healthcare providers to detect disease and make treatment decisions, scientists to explore the secrets of life, pharmaceutical companies to develop new drugs, and other professionals to apply advanced tools for a diverse range of needs that include human identification, veterinary medicine and food safety. Our mission is to make improvements in life possible by enabling our customers to achieve outstanding success and breakthroughs in Molecular Diagnostics, Applied Testing, Pharma and Academia.

Biological samples contain millions of molecules, but only a small portion of this material is typically of interest for specific medical or other applications. Sample technologies are used to collect biological materials and stabilize, extract and purify the molecule of interest. Assay technologies are then used to amplify and enrich this small amount of isolated material to make it readable and ready for interpretation. Sample & Assay Technologies operate in a highly synchronized manner.

QIAGEN began operations in 1986 by introducing to the emerging biotechnology sector a novel method that standardized and dramatically accelerated the extraction and purification of nucleic acids-biological molecules such as DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) that are essential for life as carriers of genetic information. Since the introduction of that first ready-to-use kit, QIAGEN has expanded to become the global leader with a broad offering of molecular technologies, including related automated systems.

Our products are used in virtually all areas of science focused on advancing knowledge about the molecular basis of life. QIAGEN has become a trusted partner by enabling researchers to obtain exciting insights with products that are considered standards for quality and reliability. More than one billion biological samples are estimated to already have been prepared or analyzed using QIAGEN technologies in laboratories around the world. Net sales of US$ 1,2 billion in 2011 were composed of consumable kits and other revenues (87% of sales) and automated systems and instruments (13% of sales).

QIAGEN has leveraged its leadership position in Sample & Assay Technologies to build a strong position in Molecular Diagnostics. The commercial applications of molecular technologies are transforming healthcare by providing highly specific genetic information to guide prevention and treatment strategies. Molecular Diagnostics accounted for 47% of net sales in 2011. Our products also are increasingly used in Applied Testing, which are areas of molecular testing not related to human healthcare or research that include human identification and forensics, food and water safety, and veterinary testing.

With a focus on innovation, QIAGEN now markets more than 500 core products that are distributed in thousands of variations and combinations. Innovative products are continually being introduced to address new market opportunities or extend the life of existing product lines. We have made a number of strategic acquisitions to enhance our technology and product offerings. We have funded our growth through internally generated funds as well as through debt offerings and private and public sales of equity securities. QIAGEN shares are listed on the NASDAQ exchange under the ticker symbol “QGEN” and on the Frankfurt Prime Standard as “QIA.”

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QIAGEN N.V.

The company is registered under its commercial and legal name QIAGEN N.V. with the trade register (kamer van koophandel) of the Dutch region Limburg Noord under file number 12036979. QIAGEN N.V. is a public limited liability company (naamloze vennootschap) under Dutch law as a holding company. Our principal executive office is located at Spoorstraat 50, 5911 KJ Venlo, The Netherlands, and our telephone number is +31-77-320-8400.

As a holding company, QIAGEN conducts business through subsidiaries located throughout the world, including the Americas, Europe, China, Japan, Australia, India and other major markets. Further information about QIAGEN can be found at www.qiagen.com. By referring to our website, we do not incorporate the website or any portion of the website by reference into this Annual Report.

Recent Developments

QIAGEN achieved a number of strategic milestones in the development of our business in 2011:

| • |  | In January, QIAGEN began direct sales through a subsidiary in India, a strategic market with 1,2 billion people and rapidly growing healthcare and R&D sectors. The new presence in India is a milestone in QIAGEN’s strategy to expand our footprint in emerging, high-growth regions.

| • |  | In May, we updated our strategy for ongoing development of the QIAensemble suite of next-generation automation platforms, including the QIAensemble Decapper, the industry’s first automated device to unseal liquid cytology sample vials, one of the most burdensome steps in laboratory workflow. The Decapper was launched in December 2011. The future QIAensemble suite is planned to incorporate proven core components from the QIAsymphony platform, enhancing compatibility and allowing migration of tests between the two platforms.

| • |  | In July, QIAGEN purchased 62% of the shares of Ipsogen S.A., a publicly listed French company that is a global leader in molecular profiling for leukemia and other blood cancers. We initiated a public tender offer for the remaining shares in October and held an 89% stake by year-end. QIAGEN intends to fully acquire Ipsogen. The relationship provides access to a broad range of assays covering 15 biomarkers used worldwide for the diagnosis, prognosis and monitoring of patients with various blood cancers. Many of these assays have the potential to be used as companion diagnostics to guide treatment decisions. Almost all of Ipsogen’s assays have been developed for use on QIAGEN’s Rotor-Gene Q real-time PCR system, which will enable smooth transfer onto the QIAsymphony RGQ platform.

| • |  | In August, we fully acquired Cellestis Ltd., a publicly listed Australian company that has developed and begun to commercialize QuantiFERON®, a patent-protected “pre-molecular” technology capable of providing information on diseases far earlier than possible with other diagnostic methods. Cellestis has achieved regulatory approvals and product launches in major markets for QuantiFERON®-TB Gold In-Tube, a leading test for latent tuberculosis (TB), a non-symptomatic infection that affects approximately one-third of the world’s population. We believe QuantiFERON-TB Gold has significant untapped market potential as a preventive screening test to protect vulnerable populations from development of active TB disease.

| • |  | In August, QIAGEN began direct sales in Taiwan, a rapidly growing, dynamic market that adds momentum to our expansion in Asia, especially in serving the active academic research and pharmaceutical drug development sectors in Taiwan.

| • |  | Also in August, we entered into a partnership with Pfizer Inc. for development of a companion diagnostic based on QIAGEN’s proprietary KRAS assay technology, which reliably detects mutations of the KRAS gene, for use in guiding treatment with an investigational Pfizer compound in global clinical development for non-small cell lung cancer (NSCLC).

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| • |  | In September, QIAGEN entered into a partnership with Eli Lilly and Company for the development, manufacturing and commercialization of a companion diagnostic for an early stage investigational compound known as a Janus kinase 2 (JAK2) inhibitor. Lilly’s proposed drug targets the JAK2 gene, which has been shown to play a role in myeloproliferative neoplasms, a variety of blood cancers. We gained exclusive access to the JAK2 biomarker being used in developing the companion diagnostic through our agreement with Ipsogen.

| • |  | In November, QIAGEN began implementing a project to enhance productivity and free up resources for reallocation to strategic initiatives to drive growth and innovation. Initial actions focused on eliminating organizational layers, overlapping structures and duplication between global, regional and local activities. As part of this project, R&D activities will focus more tightly on high-growth areas in all customer classes. QIAGEN also plans to optimize capacity utilization at selected sites and capture savings from shared service functions. As part of this project, QIAGEN reduced its worldwide workforce by approximately 8-10% at the end of 2011 and in early 2012. Annual pre-tax cost savings of approximately US$ 50 million are expected in 2012, with the majority to be reinvested in strategic initiatives.

Our Products

QIAGEN holds leadership positions in a wide range of customer classes for Sample & Assay Technologies. We offer more than 500 core consumable products (known as “kits”) as well as a number of instrument solutions to fully automate the processing of almost all QIAGEN products used for sample preparation and subsequent analysis. The terms “Sample” and “Assay” Technologies define two phases of the process of unlocking valuable molecular information from raw biological materials, predominantly in digital form:

Sample Technologies: QIAGEN has developed and advanced a broad range of technologies to extract and purify molecules of interest from biological samples such as blood, bone, tissue, etc. QIAGEN technologies ensure that a biological sample is consistently processed in a highly reproducible, standardized method with the highest level of quality before entering subsequent analysis with assay technologies.

Assay Technologies: Building on its leadership in sample technologies, QIAGEN has developed assay technologies that enable the analysis of various kinds of molecules from virtually any biological sample. Assay technologies make information contained in isolated molecules visible and available for interpretation. Assays are tailor-made to address the specific demands of various research areas and commercial applications. Laboratory Developed Test (LDT) assays enable the customer to target molecules of interest for detection using reagents in the kit on platforms such as polymerase chain reaction (PCR). Commercially approved assays are preconfigured by QIAGEN to test for specific targets such as genetic mutations, gene expression levels, influenza, human papillomavirus (HPV), tuberculosis (TB), hepatitis and herpes viruses, or human immunodeficiency virus (HIV).

These technologies provide two main categories of revenue streams for QIAGEN:

Revenues from consumables and related sales:

Consumable products, typically sample preparation or test kits and related sales, account for approximately 85-90% of our net sales. To maximize customer convenience and reduce user error, these kits contain all necessary reagents and buffers, and a manual including protocols and relevant background information. Each kit is sufficient to support a number of applications, varying from one to more than 1.000 tests.

Major applications for QIAGEN consumable products are plasmid DNA purification, RNA purification and stabilization; genomic and viral nucleic acid purification; nucleic acid transfection; polymerase chain reaction (PCR) amplification; reverse transcription; DNA cleanup after PCR and sequencing; DNA cloning and protein purification. Our validated PCR assays enable detection of viral or bacterial pathogens and parasites in humans and animals, as well as pharmacogenomic testing and genotyping.

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Our largest-selling product is the digene HC2 HPV Test, a signal-amplified test regarded as the “gold standard” in testing for high-risk strains of the human papillomavirus (HPV), the primary cause of cervical cancer in women.

Related revenues include royalties, milestone payments from co-development agreements with pharmaceutical companies for companion diagnostics, payments from technology licenses and patent sales. We also have revenue from custom services, such as whole genome amplification services, DNA sequencing, and non-cGMP DNA production on a contract basis.

Automation systems and instruments:

Our instrumentation systems automate the use of Sample & Assay Technologies into efficient solutions for a broad range of laboratory needs. These systems, which account for approximately 10% to 15% of net sales, enable customers to perform reliable and reproducible nucleic acid sample preparation, assay setup, target detection and other laboratory tasks.

QIAGEN offers automated systems for all phases of testing, from sample to result. Among them:

QIAsymphony is an innovative, easy-to-use modular system offering many features such as continuous loading, random access, and the ability to process an almost unlimited range of sample types. QIAsymphony received the Association for Laboratory Automation’s New Product Award (NPA) following its introduction in 2008. In late 2010, we launched QIAsymphony RGQ, an integrated system that has started a new era of integrated workflow consolidation and laboratory automation, covering all steps from initial sample processing to the final result. QIAsymphony RGQ gives customers access to a broad menu of commercially available assays while also allowing them to run their own PCR-based laboratory-developed tests (LDTs), which account for more than half of the volume of tests performed in many molecular diagnostic laboratories. In 2011, the installed base of QIAsymphony systems increased to more than 550 instruments worldwide.

Rotor-Gene Q, the world’s first rotary real-time PCR cycler system, uses real-time PCR reactions to make specific sequences of DNA and RNA visible through amplification and quantifiable through real-time measurement. This system enhances QIAGEN’s options to offer sample and assay technology solutions spanning from sample to result, and is an integral part of the QIAsymphony RGQ system.

PyroMark is a high-resolution detection platform based upon Pyrosequencing technology, that allows for the real-time analysis and quantification of genetic mutations and DNA methylation patterns down to the single base pair level. This enables users to identify even previously unknown mutations or variations in targeted DNA regions. This technology also can be employed in multiplex analysis for genetic and pathogen detection. Pyrosequencing plays a pivotal role in epigenetic research and also can be of great value to diagnostic laboratories running personalized healthcare and profiling assays.

QIAcube, a sample processing instrument incorporating novel and proprietary technologies, allows users to fully automate the use of almost all of our products originally designed for manual processing of samples. The QIAcube received the NPA honor from the Association for Laboratory Automation in 2007.

QIAxcel, designed to take the place of traditional slab-gel analysis, can replace tedious and time-consuming methods of nucleic acid separation in low- to high-throughput laboratories. QIAxcel is characterized by unprecedented sensitivity and time to results for analysis of DNA fragments and RNA.

ESE-Quant Tube Scanners are portable, battery-operated optical measurement devices based on technology developed by ESE GmbH, a company we acquired in 2010. These UV and fluorescence detection systems enable point of need testing in healthcare and applied testing markets. The ESE technology permits low-throughput molecular testing in physician practices, emergency rooms, remote field areas, and other settings where a laboratory infrastructure is not accessible and fast turnaround is required

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Customers

From the early days of the biotechnology revolution, we believed that Sample & Assay Technologies for nucleic acids would play an increasingly important role in cutting-edge biology-and that major new commercial uses would develop for information extracted from DNA and RNA. We have been supplying customers since 1986 with innovative proprietary products for the analysis of nucleic acids.

We focus on four customer classes for our products:

Molecular Diagnostics-enabling hospitals, physicians and other providers to save lives and fight disease. The commercial use of these technologies in human healthcare has grown to provide approximately half of QIAGEN net sales.

Applied Testing-unlocking the potential of molecular information in testing fields not related to human healthcare, such as forensics, food and water testing, veterinary medicine, environmental testing and biosecurity.

Pharma-supporting gene-based drug discovery and development by pharmaceutical and biotechnology companies as well as the manufacturing and quality control of biological medicines.

Academia-providing tools for life sciences research, including academic institutions and governmental laboratories, such as the National Institutes of Health (NIH) in the U.S. and major research-based universities and institutes around the world.

Molecular Diagnostics

The ability of advanced diagnostic technologies to unlock molecular information from patients is changing the practice of medicine, while creating a significant and growing market for nucleic acid sample preparation and assay technology products. In recent years, the advent of polymerase chain reaction (PCR) and other amplification technologies has made the prospect of nucleic acid-based diagnostics feasible.

This new generation of molecular diagnostics can be used to identify microorganisms, cancer cells, bacteria and viruses by searching for their specific nucleic acid sequences-or to characterize previously unknown DNA sequences related to human diseases. Commercial applications for molecular diagnostics are multiplying as researchers identify new biological markers for disease and develop novel technologies for detection and analysis of those diagnostic clues from the human body.

The molecular diagnostics market, with sales estimated at approximately US$ 3 billion in 2011 is still a small part of the global in vitro diagnostics market, but it is the fastest growing segment at a projected compound annual growth rate of approximately 10%. Market penetration is still low in the U.S., other developed countries and emerging markets. However, given the advantages of precise genetic information over traditional tests, QIAGEN expects the molecular diagnostics market to provide significant growth opportunities over the long term.

Growth in the Molecular Diagnostics customer class is built upon four strategies for fighting disease, and QIAGEN is targeting each of these fields with a range of dedicated products and tailored marketing:

Prevention-using advanced technologies to screen non-symptomatic patients as a preventive strategy, such as testing women for HPV to protect from cervical cancer or screening patients for latent tuberculosis (TB) infection to guard against active TB disease.

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Profiling-screening symptomatic patients to profile the precise type of disease, for example testing patients with flu-like symptoms to confirm or rule out dangerous strains such as the influenza type A (H1N1) swine flu.

Personalized Healthcare-determining which patients are most likely to respond positively to particular therapies, such as landmark QIAGEN tests for testing the mutation status of genes such as KRAS, EGFR, BRAF and others that influence the effectiveness and safety profile of novel medicines for treatment of various cancers.

Point of Need-enabling on-site diagnosis in physician practices, emergency rooms, remote field areas, and other settings where a laboratory infrastructure is not accessible and fast turnaround is required.

We offer one of the broadest portfolios of molecular technologies for human healthcare. Success in Molecular Diagnostics depends on the ability to analyze purified nucleic acid samples from a variety of samples, including blood, tissue, body fluids and stool, and on automated systems that can handle hundreds of samples concurrently. Other key factors are the range of assays targeting various diseases and biomarkers, convenience and ease of laboratory workflow, versatility, reliability and standardization of the nucleic acid processing and detection procedures.

One of the largest prevention markets is screening for HPV, a viral infection that is the primary cause of cervical cancer, which kills about 270.000 women a year. We are the global market leader in HPV screening technologies. In the United States, we sell our HPV products primarily for two FDA-approved indications: adjunctive primary screening with a Pap test for women age 30 and older, and follow-up testing of inconsistent Pap test results in women of any age. In Europe and the rest of the world, HPV testing is in varying stages of adoption. We are working closely with public health authorities and researchers on an increasing number of clinical trials and policy initiatives aimed at expanding the use of HPV testing for prevention or follow-up to treatment of cervical cancer.

Following QIAGEN’s 2011 acquisition of Cellestis Ltd., with its early-warning QuantiFERON®-TB Gold product to detect latent TB infection, we expect to drive the growth of this highly accurate screening test as a strategy for the prevention of active TB disease in vulnerable populations.

Approximately one-third of the world’s population is infected with the tuberculosis bacterium but suffers no symptoms, a condition known as latent TB. However, about 5% to 10% of those patients at some point will develop active tuberculosis, a potentially life-threatening contagious disease that typical spreads from one active patient to 10 to 20 other people. Sales of QuantiFERON®-TB Gold were approximately US$ 55 million in 2011, and the potential global market for latent TB detection is estimated at up to US$ 1 billion.

In Profiling, we offer an extensive range of Sample & Assay Technologies for use in the diagnosis of patients for various infectious diseases, including HIV, hepatitis and influenza. We are expanding this portfolio of assays and intends to gain regulatory approvals for these products in various geographic regions in the coming years, particularly the U.S.A. key element of this global expansion will be the use of these assay technologies on QIAsymphony RGQ.

In Personalized Healthcare, we enter into collaborative arrangements with pharmaceutical and biotech companies for the co-development of companion diagnostics for personalized healthcare. We have research projects with high-profile companies such as Amgen, Boehringer Ingelheim, Bristol-Myers Squibb/ImClone, Eli Lilly, and Pfizer. Acquisitions of biomarkers and other technologies contribute to our expanding co-development relationships. For example, shortly after our acquisition of a majority interest in Ipsogen in 2011, we entered an agreement with Eli Lilly to co-develop a companion diagnostic for a Lilly compound for certain blood cancers targeting the Janus kinase 2 (JAK2) gene, based on our exclusive access to the JAK2 biomarker through Ipsogen. The first companion diagnostics are already being marketed in Europe and other markets, and we made regulatory submissions in 2011 for two companion diagnostics to be used with colorectal cancer drugs in the U.S.A. key element of the global expansion in this area is the ability of labs to efficiently use these assay technologies on QIAsymphony RGQ.

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We market a range of automation systems designed for low-, medium-, and high-throughput nucleic acid sample preparation and handling tasks in laboratories performing molecular diagnostics. The flagship platform is QIAsymphony, based on its unique characteristics. Nucleic acid samples purified on our instruments are ready for use in the demanding and sensitive downstream assays performed in molecular diagnostic applications. We offer closed and open assay technologies. Open assay technologies contain PCR reagents to identify molecules of choice. Closed assays, diagnostics with predefined targets, include multiplexing and other pathogen or genetic mutation detection assays such as tests for HIV, tuberculosis, influenza or hepatitis. We market assays directly to end customers via our sales channels, and selected assays through major diagnostic partners with complementary customer groups. In addition, we intend to enter into partnerships or other agreements with companies to broaden the distribution of our products.

Applied Testing

Demand is growing in Applied Testing-our term for the use of molecular technologies outside of human healthcare and research applications. Industry and government organizations use standardized sample preparation and assay solutions for human identification and forensics, food and water safety, and veterinary testing. The value of genetic “fingerprinting” has been shown in criminal investigations involving DNA analysis, public policy compliance for food safety and genetically modified organisms (GMOs), and containment of diseases in commercial livestock. Molecular testing can be performed by well-trained researchers in fully equipped laboratories, and increasingly also by less-trained personnel provided with easy-to-use, reproducible and standardized methods for point of need testing. Our manual DNA and RNA purification methods and the automated solutions on QIAsymphony, QIAcube, EZ1 Advanced, BioRobot EZ1 and other products, as well as our amplification enzymes and quantitative assays, address the needs in these markets.

Pharma

QIAGEN is a significant supplier for pharmaceutical and biotechnology companies. Drug discovery and development efforts increasingly employ genomic information, both to guide research in diseases and to differentiate the patient populations most likely to respond to particular therapies. Approximately half of QIAGEN sales in this customer class support research, while the remaining half of sales support clinical development processes, including the stratification of patient populations based on genetic information. QIAGEN’s GeneGlobe online portal offers scientists an industry-leading source of information with searchable data on 60.000 genomic technologies for disease pathways, including annotations and references, to guide research and to enable ordering from this very broad portfolio of assays.

As new drugs are commercialized, testing technologies developed in parallel with those therapies can move from Pharma R&D into the molecular diagnostics market as companion diagnostics, which would be marketed within the Molecular Diagnostics customer class. Healthcare professionals then can customize treatment by testing for specific genetic biomarkers that help to determine the safety and efficacy profiles of drugs in individual patients, achieving the best possible therapeutic results and avoiding unnecessary treatments. In the coming years, we expect a wave of newly discovered biomarkers and companion diagnostics to transform the treatment of an increasing number of diseases.

In addition to the broad portfolio of molecular technologies, QIAGEN brings to the Pharma market a full infrastructure for co-development programs, intellectual property on platforms and content, extensive regulatory experience, global reach in our sales channels, and independence as a company focusing exclusively on these types of technologies.

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Academia

QIAGEN provides Sample & Assay Technologies to leading research institutions around the world. Many academic laboratories continue to utilize manual, labor intensive methods for nucleic acid separation and purification. Recognizing the opportunity to replace traditional methods with reliable, fast, highly reproducible, and high-quality nucleic acid extraction and purification technologies, QIAGEN has concentrated product development and marketing efforts on the research markets in industry and Academia.

The academic market also supports our presence in the Molecular Diagnostics and Pharma customer classes. Research in university settings often helps in the development of specific technologies for targeted biomolecules, and academic research also can result in scientific publications that validate the usefulness of QIAGEN technologies for specific applications.

Global Presence by Geographic Market

QIAGEN currently markets products in more than 100 countries. The following table shows total revenue by geographic market for the past three years (net sales are attributed to countries based on the location of the subsidiary making the sale, as certain subsidiaries have international distribution):

(in US$ thousands) |  | 2011 |  |  | 2010 |
United States |  |  | 466.502 |  |  |  | 472.682 |
Other Americas |  |  | 55.137 |  |  |  | 50.912 |
Total Americas |  |  | 521.639 |  |  |  | 523.594 |
Europe |  |  | 444.441 |  |  |  | 398.029 |
Asia Pacific |  |  | 203.667 |  |  |  | 165.808 |
Net Sales |  |  | 1.169.747 |  |  |  | 1.087.431 |

Expansion into high-potential geographic markets is a core priority. The top seven emerging markets (Brazil, Russia, India, China, South Korea, Mexico and Turkey) represented 12% of net sales in 2011. We have built a presence in China with approximately 350 employees, making it our third-largest geographic market in terms of sales. In 2011, new subsidiaries were created in India and Taiwan, further expanding our presence in Asia.

Strategic Initiatives

QIAGEN believes the relevant global market for molecular diagnostics and life science research products totals approximately US$ 70 billion. Among the fundamental growth drivers in the current business environment are ongoing breakthroughs and insights into molecular biology, new technologies to analyze molecular information, improvements in the quality and reductions in cost of healthcare using diagnostics, increasing demands for quality, and revenue streams made possible through consumable products.

We have grown substantially in recent years with a flexible strategy that includes developing innovative new products, partnering, and acquiring companies or technologies to complement our portfolio.

QIAGEN has established these strategic initiatives:

| • |  | Drive platform success, particularly for QIAsymphony and QIAensemble systems

| • |  | Add content by bringing new tests to market across all customer classes

| • |  | Broaden geographic presence, especially in high-growth emerging markets

| • |  | Grow efficiently and effectively with sustained growth and improved profitability

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Research and Development

QIAGEN invests more in research and development than most companies in our industry. We are committed to expanding QIAGEN’s global leadership in Sample & Assay Technologies as rapid advances in molecular biology open up new and useful applications.

Our strategy for managing innovation focuses on addressing the most significant unmet medical and scientific needs. We target our resources to develop the most promising technologies for use by our customers in Molecular Diagnostics, Applied Testing, Pharma and Academia - and to meet the needs of healthcare professionals and scientists in key geographic markets.

Innovation at QIAGEN follows parallel paths:

| • |  | Creating new systems for automation of workflows-platforms for laboratories, hospitals and other users of these novel molecular technologies.

| • |  | Expanding our broad portfolio of “content”-in particular, novel assays to detect and characterize molecular structures and biomarkers for disease or genetic identification.

More than 700 employees in research and development work in eight centers of excellence on four continents. Our comprehensive intellectual property portfolio spans more than 1.000 granted patents and more than 1.000 pending applications.

Innovations in instrumentation are strengthening our leadership in the automation of these technologies, driving dissemination of molecular technologies in healthcare and other fields, and generating increased demand for QIAGEN consumable products. We continue to extend our modular, medium-throughput QIAsymphony platform, enabling hospitals and other customers to adopt or greatly expand their use of molecular diagnostics. QIAsymphony RGQ, designed to allow fully integrated processing from initial sample to final result, has expanded the QIAsymphony installed base since the launch of the fully integrated system in late 2010. We plan to integrate modules in the future for specialized needs such as pyrosequencing. In 2011, we updated development plans for the QIAensemble system, a high-throughput platform based on the same core technologies of QIAsymphony, including plans to enable migration of QIAGEN assays between the two platforms.

QIAGEN is commercializing a deep pipeline of content: molecular assays for preventive screening and diagnostic profiling of diseases, tests for important biomarkers to guide personalized cancer therapies, and assays for a broad range of other targets. The rollout of QIAsymphony RGQ is accompanied by an extensive development program involving assays for Molecular Diagnostics and other customer classes. Regulatory submissions planned for 2012 include companion diagnostics for cancer drugs targeting EGFR (epidermal growth factor receptor) in the U.S. and the BRAF gene in the European Union and molecular and pre-molecular assays for the infectious disease CMV (cytomegalovirus). In Applied Testing, QIAGEN continues to develop new content for human identification, food safety and veterinary diagnostics. We are also expanding our extensive portfolio of products for disease pathway research by Pharma and Academic customers. In addition, we are developing assays for specific applications in key markets such as China and Japan. The combined markets for QIAGEN’s current assay development portfolio total more than US$ 1 billion in potential annual sales.

In addition, QIAGEN has invested in co-development of companion diagnostics for personalized healthcare through projects with pharmaceutical and biotech companies. We have created a center of excellence in companion diagnostics in Manchester, U.K. These programs typically begin with development of targeted assays to assist our customers in the clinical development of new drugs by identifying patient populations most likely to respond favorably to specific therapies. The collaborations have potential to develop into companion diagnostics marketed commercially along with the new drugs.

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Sales and Marketing

We market our products in more than 100 countries throughout the world. We have established subsidiaries in markets we believe have the greatest sales potential in the Americas, Europe, Australia and Asia. We have established a network of experienced marketing personnel and employ a field sales force of more than 1.500 people, who sell QIAGEN products and provide direct support to customers. A significant number of marketing and sales staff members are experienced scientists with academic degrees in molecular biology or related areas. In addition, business managers oversee relationships with key accounts to ensure that QIAGEN is serving their needs on the commercial side, such as procurement systems, financing arrangements, data on the costs and value of our systems, and collaborations among organizations. We also have specialized independent distributors and importers in many markets.

Our marketing strategy focuses on providing high-quality products that offer customers unique value, coupled with commitment to technical excellence and customer service. We have developed a range of marketing tools to provide customers with direct access to technical support and to inform them of new product offerings, as well as to enhance QIAGEN’s reputation for technical excellence, high-quality products and commitment to customer service. One such tool is our technical service hotline, which allows existing or potential customers to discuss a wide range of technical questions regarding our products and related molecular biology procedures, via phone or e-mail, with Ph.D. and M.Sc. scientists in our technical service group. Frequent communication with customers enables us to identify market needs, gain early insight into new developments and business opportunities, and address them with new products.

QIAGEN’s GeneGlobe online portal has become a valuable outreach to life science researchers in Pharma and Academia by providing an industry-leading resource on disease pathways, biomarkers and genomic information. GeneGlobe provides searchable, annotated data on 60.000 pathway and gene-related technologies, with links to order products related to each avenue of investigation.

We also distribute several publications, including our catalog, to existing and potential customers worldwide, providing new product information, product updates, and articles by customers and by our scientists about existing and new applications. Our website (www.qiagen.com) contains a full online product catalog and ordering system, as well as a host of support tools, scientific design tools and other resources. We have full Japanese and Chinese language versions of our website, and some information is available on our site in French, German and Korean to support these markets. Information contained on our website, or accessed through it, is not part of this Annual Report. In addition, QIAGEN holds numerous scientific seminars to present technical information at leading clinical, academic and industrial research institutes worldwide. We conduct direct marketing campaigns to announce new products or offer special promotions, and we offer personalized electronic newsletters with useful information for molecular biology applications.

In addition to keeping customers informed of new product offerings, we offer an inventory consignment program. The QIAcabinet is a storage cabinet owned by the company and placed in customer laboratories at their request. Stocked with QIAGEN products, the QIAcabinet offers customers the convenience of immediate access, reducing reorder procedures and shipping costs. We monitor cabinet inventory and bill the customers at regular intervals as products are used. QIAcabinet increases our visibility in the laboratory and helps maintain our competitive position, while reducing distribution costs.

Seasonality

Our business does not experience significant, predictable seasonality. Historically, a significant portion of our sales have been to researchers, universities, government laboratories and private foundations whose funding is dependent upon grants from government agencies, such as the National Institutes of Health and similar

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bodies. To the extent that our customers experience increases, decreases or delays in funding arrangements and budget approvals, and to the extent that any of our customers’ activities are slowed, such as during times of higher unemployment, vacation periods or delays in the approval of government budgets, including the U.S. federal government’s budget, we may experience fluctuations in sales volumes during the year or delays from one period to the next in the recognition of sales.

Intellectual Property, Proprietary Rights and Licenses

We have made and expect to continue to make investments in intellectual property. In 2011, our purchases of intangible assets totaled US$ 34,6 million. While we do not depend solely on any individual patent or technology, we are significantly dependent in the aggregate on technology that we own or license. Therefore, we consider protection of proprietary technologies and products one of the major keys to our business success. We rely on a combination of patents, licenses and trademarks to establish and protect proprietary rights. As of December 31, 2011, we owned 186 issued patents in the United States, 136 issued patents in Germany and 740 issued patents in other major industrialized countries. We have over 1,000 pending patent applications. Our policy is to file patent applications in Western Europe, the United States and Japan. U.S. patents have a term of 17 years from the date of issue (for patents issued from applications submitted prior to June 8, 1995), or 20 years from the date of filing (in the case of patents issued from applications submitted on or after June 8, 1995). Patents in most other countries have a term of 20 years from the date of filing the patent application. We intend to aggressively prosecute and enforce patents and to otherwise protect our proprietary technologies. We also rely on trade secrets, know-how, continuing technological innovation and licensing opportunities to develop and maintain our competitive position.

Our practice is to require employees, consultants, outside scientific collaborators, sponsored researchers and other advisers to execute confidentiality agreements upon commencement of their relationships with us. These agreements provide that all confidential information developed by or made known to the individual during the course of the relationship is to be kept confidential and not disclosed to third parties, subject to a right to publish certain information in scientific literature in certain circumstances and to other specific exceptions. In the case of our employees, the agreements provide that all inventions conceived by individuals in the course of their employment will be our exclusive property.

Competition

We believe our primary competition in sample technology products involves traditional separation and purification methods, such as phenol extraction, cesium chloride density gradient centrifugation, and precipitation. These methods utilize widely available reagents and other chemicals supplied by companies such as Sigma-Aldrich Corp. and Roche Diagnostics GmbH (Applied Sciences Division). We compete with these methods through our innovative technologies and products, which offer a comprehensive solution for nucleic acid collection, pre-treatment, separation and purification needs and provide significant advantages in speed, reliability, convenience, reproducibility and ease of use.

We also experience competition in various markets from other companies providing sample preparation products in kit form and assay solutions. These competitors include, but are not limited to, Promega Corp., Millipore Corp., and Macherey-Nagel GmbH for nucleic acid separation and purification; Life Technologies Corp. and Promega Corp. for assay solutions and for transfection reagents; and Sigma-Aldrich Corp. and Fisher Scientific for protein fractionation products. We believe our proprietary technologies and products offer significant advantages over competitors’ products with regard to purity, speed, reliability and ease-of-use.

In our HPV franchise, we face competition from well-established diagnostic technologies, such as cytology, and from emerging HPV testing approaches, such as signal amplified testing, research-based PCR, other indicators of disease and other traditional testing methods developed by laboratories. Our competitors include

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companies such as Roche Diagnostics GmbH and Gen-Probe, Inc., whose HPV tests were approved in the U.S. during the second half of 2011, as well as Hologic, Inc., which has been marketing FDA-approved HPV testing products in the U.S. in recent years. We expect competition to intensify, but QIAGEN’s leading position in the HPV market is supported by our marketing efforts and the data supporting our “gold standard” digene HPV Test. We believe we have a competitive advantage driven by the fact that more than 80 million of these tests have been distributed worldwide as well as a multitude of clinical trials encompassing more than one million women. These clinical trial results, many of which have been published in peer-reviewed journals such as the New England Journal of Medicine, have validated that our HPV test products, used alone or in conjunction with the Pap test, demonstrate high clinical sensitivity and high negative predictive value for diagnosis of cervical disease and cancer. In addition to the industry-leading clinical performance of our assay, considering the high-volume needs of the HPV testing market, QIAGEN has another competitive benefit in terms of its offering for HPV testing automation systems, including performance and reliability, ease of use, standardization, cost, proprietary position and regulatory approvals. In 2011, multiyear contracts were concluded with a number of major U.S. customers for HPV screening products. Also in late 2011, QIAGEN launched the QIAensemble Decapper in the U.S., which automates several manual processing steps.

The medical diagnostics and biotechnology industries are subject to intense competition. Some of our other products, such as tests for Chlamydia, Gonorrhea, hepatitis B virus, herpes simplex virus and cytomegalovirus, compete against existing screening, monitoring and diagnostic technologies, including tissue culture and antigen-based diagnostic methodologies. Our competitors for gene-based diagnostic probes include Roche Diagnostics, Abbott, Siemens and Gen-Probe. We believe the primary competitive factors in the market for gene-based probe diagnostics and other screening devices are clinical validation, performance and reliability, ease of use, standardization, cost, proprietary position, competitors’ market shares, access to distribution channels, regulatory approvals and availability of reimbursement.

We do not believe our competitors have the same comprehensive approach to Sample & Assay Technologies as QIAGEN or the ability to provide the broad range of technologies and depth of products and services that we offer. With our complete range of manual and fully automated solutions, we believe we offer the value of standardization of procedures and, therefore, more reliable results. We also believe our integrated strategic approach gives us a competitive advantage. The quality of sample preparation-a field in which we have a unique market and leadership position-is a key prerequisite for reliable molecular assay solutions, which increasingly are being applied in emerging markets such as Molecular Diagnostics and Applied Testing.

Current and potential competitors may be in the process of seeking FDA or foreign regulatory approvals for their respective products. QIAGEN’s continued future success will depend in large part on our ability to maintain our technological advantage over competing products, expand our market presence and preserve customer loyalty. There can be no assurance that we will be able to compete effectively in the future or that development by others will not render our technologies or products non-competitive.

Suppliers

As part of our quality assessment procedures, we periodically evaluate the performance of our raw material suppliers, potential new alternative sources of such materials, and the risks and benefits of reliance on our existing suppliers. We buy materials for our products from many suppliers, and are not dependent on any one supplier or group of suppliers for our business as a whole. Raw materials generally include chemicals, raw separation media, biologics, plastics and packaging. Raw materials are generally readily available at competitive, stable prices from a number of suppliers. Certain raw materials are produced under our specifications, so we closely monitor stock levels to maintain adequate supplies. We believe we maintain inventories of raw materials at a sufficient level to ensure reasonable customer service levels and to guard against normal volatility in availability.

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Government Regulations

We are not subject to direct regulation other than regulation generally applicable to businesses pursuant to various laws and regulations in effect in the different jurisdictions in which we operate, including laws and regulations applicable to environmental matters, such as the handling and disposal of hazardous wastes. Our research and development activities involve the controlled use of small amounts of hazardous materials, chemicals and radioactive compounds. Although we believe that our safety procedures for handling and disposing of such materials comply with the standards prescribed by applicable regulations, such as the United States Occupational Safety and Health Administration’s, or OSHA, Hazard Communication and Occupational Exposure to Hazardous Chemicals in Laboratories standards, the risk of accidental contamination or injury from these materials cannot be completely eliminated. In the event of such an accident, we could be held liable for any damages that result, and any such liability could have a material adverse effect on us.

We also comply with the OSHA Bloodborne Pathogens standard and the Center for Disease Control/National Institutes of Health Biosafety in Microbiological and Biomedical Laboratories standards for the handling of biological materials and comply with the United States Department of Transportation and International Air Transport Association regulations for the shipping of our kits which contain materials classified as hazardous. There are other federal, state and local laws and regulations applicable to our business, including those of the United States Environmental Protection Agency and the Maryland Department of the Environment. However, we do not expect that compliance with governmental regulations to which we are subject will have a material effect on our capital expenditures, earnings or competitive positions.

International sales of in vitro diagnostic (IVD) and other medical devices are subject to the regulatory requirements of each country or defined economic region, such as the European Union. The regulatory review process varies from country to country and many countries also impose product standards, packaging requirements, labeling requirements and import restrictions on devices.

In the United States, IVDs are regulated by the FDA as medical devices. Medical devices are classified into one of three classes on the basis of the controls deemed by the FDA to be necessary to reasonably ensure their safety and effectiveness. Class I devices are subject to general controls, including labeling, premarket notification and adherence to FDA’s quality system regulations, which are device-specific good manufacturing practices. Class II devices are subject to general controls and special controls, including performance standards and postmarket surveillance. Class III devices are subject to most of the previously identified requirements as well as to premarket approval. Class I devices are exempt from premarket submissions to the FDA; most Class II devices require the submission of a 510(k) premarket notification to the FDA; and Class III devices require submission of a premarket approval application, or PMA. Most in vitro diagnostic kits are regulated as Class I or Class II devices and are either exempt from premarket notification or require a 510(k) submission.

A 510(k) notification must demonstrate that a medical device is substantially equivalent to another legally marketed device, termed a “predicate device,” that is legally marketed in the United States and for which a PMA was not required. A device is substantially equivalent to a predicate device if it has the same intended use and technological characteristics as the predicate, or has the same intended use but different technological characteristics, where the information submitted to the FDA does not raise new questions of safety and effectiveness and demonstrates that the device is at least as safe and effective as the legally marketed device. Most 510(k)s do not require clinical data for clearance, but a minority will. The FDA is supposed to issue a decision letter within 90 days of receipt of the 510(k) if it has no additional questions or send a first action letter requesting additional information within 75 days. Requests for additional data, including clinical data, will increase the time necessary to review the notice. If the FDA does not agree that the new device is substantially equivalent to the predicate device, the new medical device is automatically classified as a Class III device for which a PMA will be required. However, the sponsor may petition the FDA to make a risk-based determination that the device does not pose the type of risk associated with Class III devices and down-classify the device to Class I or Class II.

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Class III devices, such as our HC2 HPV test, require the submission and approval of a PMA prior to product sale. The PMA process is more complex, costly and time consuming than the 510(k) process. A PMA must be supported by more detailed and comprehensive scientific evidence, including clinical data, to demonstrate the safety and efficacy of the medical device for its intended purpose. If the device is determined to present a “significant risk,” the sponsor may not begin a clinical trial until it submits an investigational device exemption, or IDE, to the FDA and obtains approval from the FDA to begin the trial. After the PMA is submitted, the FDA has 45 days to make a threshold determination that the PMA is sufficiently complete to permit a substantive review. If the PMA is complete, the FDA will file the PMA. The FDA is subject to a performance goal review time for a PMA of 180 days from the date of filing, although in practice this review time is longer. Questions from the FDA, requests for additional data and referrals to advisory committees may delay the process considerably. The total process may take several years, and the FDA may also request additional clinical data as a condition of approval or after the PMA is approved. Product changes after approval typically require a supplemental submission with FDA review cycles ranging from 30 to 180 days.

Any products manufactured or distributed pursuant to FDA clearances or approvals are subject to pervasive and continuing regulation by the FDA, including recordkeeping requirements, reporting of adverse experiences with the use of the device, and restrictions on advertising and promotion. Device manufacturers are required to register their establishments and list their devices with the FDA and are subject to periodic inspections by the FDA and certain state agencies. Noncompliance with applicable FDA requirements can result in, among other things, warning letters, fines, injunctions, civil penalties, recalls or seizures of products, total or partial suspension of production, refusal of the FDA to grant 510(k) or PMA approval for devices, withdrawal of 510(k) clearances and/or PMA approvals, or criminal prosecution.

Some of our test kits are sold for research use only in the United States. We do not promote these tests for clinical diagnostic use, and they are labeled “For Research Use Only” or RUO, as permitted by FDA regulations.

Receipt and maintenance of regulatory authorization to market and sell our products is vital to future success. In addition to seeking regulatory authorizations for our products, we work with other companies to seek regulatory clearance or approval for use of their products to provide the specimens necessary to perform our diagnostic tests. The time, money and resources required for new product clearances or approvals by the FDA and foreign authorities is unpredictable, and the necessary approvals or clearances may not be granted on a timely basis or at all. Delays or failure to receive such approvals or clearances could have a material adverse effect on our business, financial condition and results of operations.

Organizational Structure

QIAGEN N.V. is the holding company for more than 50 consolidated subsidiaries, the majority of which have the primary function of the distribution of our products and services on a regional basis. Certain subsidiaries also have research and development or production activities. A listing of our significant subsidiaries and their jurisdictions of incorporation is included in the Notes to the Consolidated Financial Statements.

Description of Property

QIAGEN’s production and manufacturing facilities for consumable products are located in Germany, the United States, China, France, and the United Kingdom. Our instrument production facilities are located in Switzerland. In recent years, we have made investments in automated and interchangeable production equipment to increase our production capacity and improve efficiency.

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Our production and manufacturing operations are highly integrated and benefit from sophisticated inventory control. Production management personnel are highly qualified, and many have advanced degrees in engineering, business and science. We also have installed and continue to expand production-planning systems that are included in our integrated information and control system based on the SAP R/3 business software package from SAP AG. Worldwide, we use SAP software to integrate most of our operating subsidiaries. Capital expenditures for property, plant and equipment totaled US$ 86,8 million and US$ 79,7 million for 2011 and 2010, respectively.

QIAGEN has an established quality system, including standard manufacturing and documentation procedures, intended to ensure that products are produced and tested in accordance with the FDA’s Quality System Regulations, which impose current Good Manufacturing Practice (cGMP) requirements. For cGMP production, special areas were built in our facilities in Hilden, Germany, and Germantown and Gaithersburg, Maryland. These facilities operate in accordance with cGMP requirements.

The consumable products manufactured at QIAGEN GmbH in Germany, and QIAGEN Sciences, Inc. and QIAGEN Gaithersburg, Inc., both in Maryland, are produced under ISO 9001: 2000, ISO 13485:2003 for Medical Devices, and ISO 13485:2003 CMDCAS, and the EC Directive 98/79/EC for medical devices. QIAGEN Instruments AG in Switzerland, which produces the majority of our instrumentation product line, is also ISO 9001: 2000 and 13485:2003 certified. Our certifications form part of our ongoing commitment to provide our customers high-quality, state-of-the-art Sample & Assay Technologies and to the development of our Total Quality Management system.

Our facilities in Hilden, Germany, currently occupy a total of approximately 755.000 square feet, some of which is leased pursuant to separate contracts, the last of which expires in 2018. Our production capacity is increased through our manufacturing and research facilities in the United States. QIAGEN Sciences, Inc. owns a 27-acre site in Germantown, Maryland. The 200.000 square foot Germantown facility consists of several buildings in a campus-like arrangement and is intended to accommodate over 250 employees. There is room for future expansion of up to 200.000 square feet of facility space. We lease a facility in Gaithersburg, Maryland, comprising a total of 150.000 square feet for manufacturing, warehousing, distribution and research operations.

In 2009, we purchased additional land adjacent to our facility in Hilden, Germany, for EUR 2,5 million (approximately US$ 3,2 million) and began construction to further expand our facilities for research and development and production. In 2010, we began construction on expansion of our research, production and administrative space in Germantown, Maryland. While the construction in Germany is complete, the U.S. expansion projects are expected to continue into 2014, with both projects estimated at a total cost of approximately US$ 94,0 million, of which US$ 54,1 million had been incurred as of December 31, 2011. We anticipate being able to fund these expansions with cash generated by operating activities.

Other subsidiaries throughout the world lease smaller amounts of space. Our corporate headquarters are located in leased office space in Venlo, The Netherlands.

We believe our existing and planned production and distribution facilities can support anticipated production needs for the next 36 months. Our production and manufacturing operations are subject to various federal, state, and local laws and regulations including environmental regulations. We do not believe we have any material issues relating to these laws and regulations.

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Operating and Financial Review and Prospects for the Period from January 1, 2011, to December 31, 2011

Note regarding Forward-Looking Statements and Risk Factors

Our future operating results may be affected by various risk factors, many of which are beyond our control. Certain of the statements included in this Annual Report and the documents incorporated herein by reference may be forward-looking statements as amended, including statements regarding potential future net sales, gross profit, net income and liquidity. These statements can be identified by the use of forward-looking terminology such as “believe,” “hope,” “plan,” “intend,” “seek,” “may,” “will,” “could,” “should,” “would,” “expect,” “anticipate,” “estimate,” “continue” or other similar words. Reference is made in particular to the description of our plans and objectives for future operations, assumptions underlying such plans and objectives, and other forward-looking statements. Such statements are based on management’s current expectations and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. We caution investors that there can be no assurance that actual results or business conditions will not differ materially from those projected or suggested in such forward-looking statements as a result of various factors. Factors which could cause such results to differ materially from those described in the forward-looking statements include those set forth in the risk factors below. As a result, our future success involves a high degree of risk. When considering forward-looking statements, you should keep in mind that the risk factors could cause our actual results to differ significantly from those contained in any forward-looking statement.

Results of Operations, Financial Position

Overview

QIAGEN is the world’s leading provider of innovative Sample & Assay Technologies, based on independent market studies of United States and European market shares for our products and technologies. Our automated systems and consumable products empower customers to transform raw biological samples into valuable molecular information. Sample technologies are used to isolate DNA, RNA and proteins from any biological sample, such as blood or tissue. Assay technologies are then used to amplify, enrich and provide results for analysis of biomolecules, such as the DNA of a virus or a mutation of a gene.

We sell our products, sample and assay kits known as consumables and automated instrumentation systems using those technologies, to four major customer classes:

| • |  | Molecular Diagnostics – healthcare providers supporting many aspects of patient care including prevention, profiling of diseases, personalized healthcare and point of need testing

| • |  | Applied Testing – customers using molecular technologies in fields such as forensics, veterinary diagnostics and food safety testing

| • |  | Pharma – drug discovery and development efforts of pharmaceutical and biotechnology companies

| • |  | Academia – researchers exploring the secrets of life such as the mechanisms and pathways of diseases, and in some cases translating that research into drug targets or commercial applications

QIAGEN markets products in more than 100 countries throughout the world. We have established subsidiaries in markets we believe have the greatest sales potential, including countries throughout Europe, Asia, the Americas and Australia. We also work with specialized independent distributors and importers. As of December 31, 2011, we employed approximately 3,900 people in more than 35 locations worldwide.

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In 2011, operating income on a consolidated basis was US$ 30,3 million, a 85% decline from US$ 196,5 million in 2010. The decline in operating income was due to the impact of a restructuring-related charge in the fourth quarter of 2011 as well as charges related to the acquisitions of Cellestis and Ipsogen.

We have achieved five-year compound annual growth rates of approximately 20% in net sales through 2011, as reported under IFRS. We have funded our growth through internally generated funds, debt, and private and public sales of equity securities.

Recent Acquisitions

QIAGEN has made a number of strategic acquisitions since 2008, expanding our technology and product offerings as well as extending our geographic presence. These transactions include:

| • |  | In August 2011, we acquired Cellestis Ltd., a publicly listed Australian company that develops and provides in-vitro diagnostics and life science research products based on its proprietary QuantiFERON® technology. The technology provides information on the activity of the cell-mediated functions of the immune system from whole blood samples. By tapping into the body’s memory system, this approach allows diseases to be detected much earlier than with other diagnostic methods, such as PCR. With QuantiFERON®, we are adding a “pre-molecular” technology that allows us to look even deeper than with DNA-based molecular testing and thereby strive to feed and drive our DNA-based molecular franchise. QuantiFERON® is a trademark of Cellestis, Ltd.

| • |  | In July 2011, we entered into binding agreements with a group of major shareholders of Ipsogen S.A. and purchased a majority of the Ipsogen shares. Ipsogen S.A., a publicly listed French company that is a global leader in molecular profiling and personalized healthcare diagnostics for a broad range of blood cancers. In October 2011, we initiated a public tender offer for the remaining shares. By year-end 2011, we had acquired 89% of the shares of Ipsogen. QIAGEN intends to fully acquire Ipsogen through future public offers.

| • |  | In January 2010, we acquired ESE GmbH, now QIAGEN Lake Constance GmbH, a German developer and manufacturer of portable, battery-operated, “ultra-fast time to result” multiplex UV and fluorescence optical measurement devices. ESE’s fluorescence detection systems for point of need testing in healthcare and in Applied Testing enable low-throughput molecular testing in physician practices, emergency rooms, remote field areas, and other settings where a laboratory infrastructure is not accessible and fast turnaround is required.

| • |  | In December 2009, we acquired SABiosciences Corporation, based in Frederick, Maryland. SABiosciences holds a leading position in the design and commercialization of disease- and pathway-focused real-time PCR-based assay panels (PCR Arrays), which are widely utilized in biomedical research and in development of new drugs and diagnostics.

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| • |  | In September 2009, we acquired DxS Ltd, a pioneer in development and marketing of companion diagnostics that enable physicians to predict patient responses in order to make cancer therapies more effective. Headquartered in Manchester, U.K., QIAGEN Manchester, Ltd brings a portfolio of molecular diagnostic assays and related intellectual property, as well as a deep pipeline of companion diagnostic partnerships in oncology with leading Pharmaceutical companies. With the acquisition, we believe we can take a leading position in personalized healthcare and strengthen our overall strategic position in Molecular Diagnostics.

Our financial results include the contributions of our recent acquisitions from the date of acquisition, as well as the costs related to the acquisitions and integrations of the acquired companies, such as the costs related to the relocation and closure of certain facilities.

Restructuring

In November 2011, QIAGEN began implementing a project to enhance productivity and free up resources for reallocation to strategic initiatives to drive growth and innovation. Initial actions focused on eliminating organizational layers, overlapping structures and duplication between global, regional and local activities. As part of this project, R&D activities will focus more tightly on high-growth areas in all customer classes. QIAGEN also plans to optimize capacity utilization at selected sites and capture savings from shared service functions. As part of this project, QIAGEN reduced its worldwide workforce by approximately 8-10% at the end of 2011 and in early 2012. Annual pre-tax cost savings of approximately US$ 50 million are expected in 2012, with the majority to be reinvested in strategic initiatives.

In connection with this project we recorded total pretax charges of US$ 131,0 million in the fourth quarter of 2011, of which US$ 5,5 million is recorded in cost of sales, US$ 69,4 million is recorded in general, administrative, integration and other expense, US$ 48,6 is included in research and development expense and US$ 7,5 million is included in purchase intangibles amortization. The pretax charges consist of US$ 20,1 million for workforce reductions and US$ 98,2 million for intangible asset impairment charges which have been recorded against the respective assets. Additionally we incurred contract termination and consulting costs of US$ 12,7 million. At December 31, 2011, a restructuring accrual of US$ 26,9 million was included in other current liabilities.

Other Changes in 2010

During 2010, we determined that QIAGEN operates as one business segment in accordance with IFRS 8, Segment Reporting. Our decision-making process has evolved as a result of our continued growth, restructuring and streamlining of the organization, and revised internal budgeting and reporting approaches. Our chief operating decision maker (CODM) has now transitioned to making decisions on business operations and resource allocation based on evaluations of the QIAGEN Group as a whole. With revenues derived from our entire product and service offerings, it is not practicable to provide a detail of revenues for each group of similar products and services or for each customer group, as full discrete financial information is not available. Accordingly, we operate as one reporting segment. However, we do provide certain revenue information by customer class to allow better insight into our operations. This information is estimated using certain assumptions to allocate revenue among the customer classes.

In March 2010, the U.S. President signed the Patient Protection and Affordable Care Act and a reconciliation bill that amended the Health Care and Education Reconciliation Act of 2010 (collectively, the “Acts”). As a result of the Acts, a 2,3% excise tax will be imposed on the sale, including leases, of any taxable medical

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devices by the manufacturer, producer or importer of such devices. A “taxable medical device” is any FDA-regulated device intended for human use. The excise tax will apply to U.S. sales of all taxable medical devices occurring after December 31, 2012. While we continue to evaluate the potential impact at the present time, we expect a net positive impact from the Acts effective 2013 due to the expected increase in net sales resulting from increased healthcare coverage, which will be partially offset by the excise tax.

Year Ended December 31, 2011, Compared to 2010

Net Sales

In 2011, net sales increased 8% to US$ 1.169,7 million compared to US$ 1.087,4 million in 2010. Organic sales increased by 2% as well as sales from our recently acquired businesses companies (2%). In 2011, consumable and related revenues, which represent approximately 87% of total sales, reported an 8% increase as compared to 2010. Sales of instrumentation products, which represent 13% of net sales, increased 5% in 2011. QIAsymphony placements contributed to growth in cash sales and growing pro-rata contributions under multiyear reagent rental agreements implemented since the launch of the full QIAsymphony RGQ system in late 2010.

In Molecular Diagnostics, which represents approximately 47% of net sales, we achieved an increase of 9% in 2011 compared to 2010. In 2011, healthcare-related sales advanced based on the global rollout of the QIAsymphony automation platform and increasing use of our companion diagnostics portfolio in Europe and other markets outside the U.S. Personalized Healthcare revenues also benefited from milestone payments for co-development projects with Pharmaceutical companies. Global HPV (human papillomavirus) test sales were slightly lower in 2011, due mainly to the decline in U.S. sales linked to reduced demand for tests amid ongoing challenging economic conditions. Net sales in 2011 also included first-time contributions from Cellestis and Ipsogen, both of which were acquired in the second half of 2011.

In Applied Testing, which represents approximately 7% of net sales; we achieved 4% growth in 2011 compared to 2010, primarily as a result of higher instrumentation sales. Consumable sales of human identification and forensics products increased, benefitting from new European standards. Applied Testing also saw contributions from new veterinary testing and food safety products.

In Pharma, which represents approximately 20% of net sales, we experienced 7% growth in 2011 compared to 2010, led by a demand for products used in oncology research as well as the GeneGlobe portfolio. Also contributing to the growth was ongoing expansion of Certal products used on QIAsymphony for quality control in biopharmaceutical processing.

In Academia, which represents approximately 26% of our net sales, we experienced 7% growth in 2011 compared to 2010, reflecting increased sales in both consumable and instrumentation products following the success of targeted growth initiatives, primarily in Europe and Asia/Pacific, while the Americas continues to experience ongoing budget uncertainty and cautious spending.

A significant portion of our revenues is denominated in euros and currencies other than the United States dollar. Changes in currency exchange rates can affect net sales, potentially to a significant degree. Net sales were positively impacted by US$ 33,9 million in currency exchange movements for 2011 as compared to 2010.

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Gross Profit

Gross profit was US$ 748,4 million, or 64% of net sales, in 2011, compared to US$ 715,6 million, or 66% of net sales; in 2010 The decline in gross margin was due to several factors. Generally, our consumable sample and assay products have a higher gross margin than our instrumentation products and service arrangements. Fluctuations in the sales levels of these products and services can result in fluctuations in gross margin between periods. An increase in milestone payments from companion diagnostic co-development arrangements in 2011 negatively affected the margin since the gross margin on these services is significantly below the margin on product sales. In addition, the QuantiFERON TB product acquired with the Cellestis acquisition in 2011 carries a lower gross margin. Gross margin also was negatively impacted by 2011 costs related to the relocation of production facilities, including moving into newly constructed production space in Hilden, Germany. Additionally, gross margin in 2011 reflects costs incurred following the Japanese earthquake and other natural disasters in the first half of 2011, as well as costs related to the restructuring announced late in 2011.

Amortization expense related to developed technology and patent and license rights acquired in a business combination is included in cost of sales. The amortization expense on purchased intangibles amortization within cost of sales increased to US$ 70,2 million in 2011 from US$ 61,8 million in 2010, as a result of an increase in intangibles acquired in recent business combinations. We expect our purchased intangibles amortization to continue to increase as a result of our acquisitions.

In addition, during 2011, a total of US$ 9,6 million was expensed to acquisition-related cost of sales in connection with the write-off of inventories made obsolete following an acquisition as well as the write-up of acquired inventory to fair market value as a result of business combinations. In 2010, this expense was US$ 1,3 million. In accordance with purchase accounting rules, acquired inventory was written up to fair market value and subsequently expensed as the inventory was sold.

For the adjusted results reconciliation we have eliminated share-based compensation expense included in cost of sales of US$ 3,1 million (2010: 0,9 million), business integration, acquisition and restructuring cost of US$ 10,9 million (2010: US$ 1,3 million) and purchased intangibles amortization expense of US$ 70,2 million (2010: 61,8 million). The gross profit, net of any of such cost increased to US$ 832,5 million (2010: 779,6 million), the adjusted gross profit margin amounts 71,2% (2010: 71,7%).

Research and Development Expense

Research and development expenses increased by 53% to US$ 175,8 million (15% of net sales) in 2011, compared to US$ 114,8 million (11% of net sales) in 2010. The increase is the result of an impairment assessment during 2011 where we considered additional charges from the write-off of several older projects of US$ 56,1 million (2010: US$ 1,4 million) included in research and development expense. Our business combinations, along with the acquisition of new technologies, have resulted in an increase in research and development costs. As we continue to discover, develop and acquire new products and technologies, we expect to incur additional expenses related to facilities, licenses and employees engaged in research and development efforts. Additionally, research and development costs are expected to increase as a result of seeking regulatory approvals, including U.S. FDA Pre-Market Approval (PMA), U.S. FDA 510(k) clearance and EU CE approval of certain assays or instruments. We have a strong commitment to innovation and expect to continue to make investments in our research and development efforts. Share-based compensation expense

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included in research and development expense amount to US$ 5,9 million (2010: 2,1 million). For the adjusted result we have eliminated impairment charges from the write-off of several older projects of US$ 56,1 million (2010: 1,4 million) and the before-mentioned share-based compensation.

Sales and Marketing Expense

Sales and marketing expenses increased 16% to US$ 311,3 million (27% of net sales) in 2011 from US$ 267,5 million (25% of net sales) in 2010. The increase in sales and marketing expenses reflects the acquisitions in 2011 along with increased sales and marketing investments to globalize the newly acquired Cellestis and Ipsogen product portfolios, as well as our investment in new sales subsidiaries in India and Taiwan. Sales and marketing expenses are primarily associated with personnel, commissions, advertising, trade shows, publications, freight and logistics expenses and other promotional expenses. In addition, the sales and marketing expenses include the costs of maintaining separate sales organizations addressing customers in Molecular Diagnostics, Applied Testing, Pharma and Academia. We anticipate that sales and marketing costs will continue to increase along with new product introductions and growth in sales of our products, but we expect sales and marketing costs will grow at a relatively slower rate than our overall revenue growth over the long term.

Sales and marketing expense include share-based compensation expense of US$ 8,5 million (2010: 3,1 million) which is eliminated for the adjusted result.

General and Administrative, Integration and Other Expense

General and administrative, business integration, restructuring and related costs increased by 75% to US$ 195,6 million (17% of net sales) in 2011 from $111,6 million (10% of net sales) in 2010. The net increase is due primarily to US$ 74,9 million in restructuring costs in 2011 related to internal restructuring of subsidiaries, including severance and retention costs, plus increased costs in connection with our 2011 acquisitions, partially offset by operational efficiencies. The restructuring costs primarily relate to a project we began in late 2011 to enhance productivity by streamlining the organization and freeing up resources for reallocation to strategic initiatives to help drive growth and innovation, strengthen our industry leadership position and improve longer-term profitability. This project aims to eliminate organizational layers and overlapping structures, actions that will enhance our processes, speed and productivity. During 2011, we incurred acquisition costs of approximately US$ 13,9 million, primarily in connection with the acquisitions of Cellestis and Ipsogen. We have continued to incur integration costs for businesses acquired, totalling approximately US$ 6,2 million in 2011, compared to US$ 10,1 million in 2010. In connection with the integration of the acquired companies, we aim to improve efficiency in general and administrative operations. As we further integrate the acquired companies and pursue other opportunities to gain efficiencies, we expect to continue to incur additional business integration and restructuring costs in 2012. Over time, we believe the integration and restructuring activities will reduce general and administrative expenses as we improve efficiency in general and administrative operations.

General administration, integration and other expenses include share-based compensation expense of US$ 20,7 million (2010: 7,7 million) and business integration, acquisition and restructuring charges of US$ 91,8 million (2010: 17,5 million).

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Purchased Intangibles Amortization

Amortization expense related to developed technology and patent and license rights acquired in a business combination is included in cost of sales. Amortization of trademarks, customer base and noncompete agreements acquired in a business combination is recorded in operating expense under the caption “purchased intangibles amortization”. Amortization expenses of intangible assets not acquired in a business combination are recorded within cost of sales, research and development, or sales and marketing line items based on the use of the asset.

During 2011, amortization expense on acquisition-related intangibles within operating expense increased to US$ 37,4 million, compared to US$ 26,6 million in 2010, the result of an increase in amortized intangibles acquired in our recent business combinations. We expect acquisition-related intangible amortization to continue to increase as a result of our acquisitions.

When eliminating purchased intangibles amortization from the reported results, the adjusted income from operations would have been higher by US$ 107,6 million (2010: US$ 88,4 million).

Financial Income and Expense

For the year ended December 31, 2011, financial income increased to US$ 7,4 million from US$ 4,5 million in 2010. The increase in financial income was primarily due to higher short-term investments during the first half of 2011.

Financial expense decreased to US$ 38,0 million in 2011 compared to US$ 40,6 million in 2010. Interest costs primarily relate to our long-term debt discussed in the accompanying notes to the consolidated financial statements. The decrease in interest expense is primarily due to a decrease in the interest expense on our long-term debt as a result of a lower market interest rates, matured interest hedging contracts and repayments of US$ 469,9 million in 2011.

When eliminating interest expense from bifurcation of the intangible debts from the reported results, the adjusted income before tax would have been higher by US$ 13,1 million in 2011, compared to US$ 14,3 million in 2010.

QIAGEN N.V.’s functional currency is the U.S. dollar and our subsidiaries’ functional currencies are the local currency of the respective countries in which they are headquartered. All amounts in the financial statements of entities whose functional currency is not the U.S. dollar are translated into U.S. dollar equivalents at exchange rates as follows: (1) assets and liabilities at period-end rates, (2) income statement accounts at average exchange rates for the period, and (3) components of shareholders’ equity at historical rates. Translation gains or losses are recorded in shareholders’ equity, and transaction gains and losses are reflected in net income. The net gain on foreign currency transactions in 2011 and 2010 was US$ 12,4 million and US$ 2,6 million, respectively. The higher gain was primarily the result of favorable currency fluctuations while funding the Cellestis acquisition.

Gains from investments in associates decreased to US$ 0,2 million in 2011 compared to US$ 2,9 million in 2010.

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As per end of December 31, 2011, other financial income was US$ 0,6 million, compared to US$ 0,6 million in 2010. The income relates to the sale of an investment in a privately held company.

Income Taxes

Our operating subsidiaries are exposed to effective tax rates ranging from zero up to more than 40%. Fluctuations in the distribution of pre-tax income among our operating subsidiaries can lead to fluctuations of the effective tax rate in the consolidated financial statements. The effective rate for 2011 is impacted by the restructuring charges, including impairments that lowered the mix of earnings in our higher taxing jurisdictions. In addition, we realized a full year benefit of the tax planning implemented in 2010 as well a partial benefit recognized from additional tax planning where implementation began late in 2011.

Reconciliation of Reported to Adjusted Results (Non-IFRS)

In its press releases QIAGEN has regularly reported adjusted results, to give additional insight into its financial performance. Adjusted results should be considered in addition to the reported results prepared in accordance with International Financial Reporting Standards, but should not be considered as a substitute. The company believes certain items should be excluded from adjusted results when they are outside of its ongoing core operations, vary significantly from period to period, or affect the comparability of results with the company’s competitors and its own prior periods.

When eliminating business integration, acquisition related and restructuring costs as well as purchased intangibles amortization and share-based compensation from the reported results, the adjusted income from operations would have been US$ 328,0 million or 28% of net sales, in 2011, compared to US$ 319,3 million, or 29% of net sales, in 2010. The income before income taxes would have been US$ 313,0 million, compared to US$ 303,5 million in 2010.

The full reconciliation of reported to adjusted results is shown in the Notes to the Consolidated Financial Statements (Note 9).

Liquidity and Capital Resources

To date, we have funded our business primarily through internally generated funds, debt, and private and public sales of equity. Our primary use of cash has been to support continuing operations and our capital expenditure requirements including construction of new facilities and acquisitions. As of December 31, 2011 and 2010, we had cash and cash equivalents of US$ 221,6 million and US$ 830,4 million, respectively. We also had short-term investments of US$ 54,6 million at December 31, 2011. Cash and cash equivalents are primarily held in U.S. dollars and Euros, other than those cash balances maintained in the local currency of subsidiaries to meet local working capital needs. At December 31, 2011, cash and cash equivalents had decreased by US$ 608,8 million from December 31, 2010, primarily due to cash used in investing activities of US$ 556,9 million and cash used in financing activities of US$ 315,8 million partially offset by cash provided by operating activities of US$ 266,7 million. As of December 31, 2011 and 2010, we had working capital of US$ 253,2 million and US$ 970,5 million, respectively.

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Cash Flows from Operating Activities

For the years ended December 31, 2011 and 2010, we generated net cash from operating activities of US$ 266,7 million and US$ 271,8 million, respectively. While net income of US$ 42,1 million in 2011 decreased by US$ 99,9 million as compared to the prior year, the non-cash components such as depreciation and amortization, share-based compensation and other non-cash activity including restructuring measures increased cash from operating activities. This increase was partially offset by net changes in operating assets and liabilities, primarily due to an increase in inventories and accounts receivable. In 2011, inventories increased primarily due to increased safety stock in connection with the transfer of production activities to a new production facility in Germany. Because we rely heavily on cash generated from operating activities to fund our business, a decrease in demand for our products, longer collection cycles or significant technological advances of competitors would have a negative impact on our liquidity.

Cash Flows from Investing Activities

Approximately US$ 556,9 million of cash was used in investing activities during 2011, compared to US$ 233,4 million during 2010. Investing activities during 2011 consisted principally of US$ 86,8 million in cash paid for purchases of property and equipment, primarily in our ongoing construction projects in Germany and the U.S., as well as US$ 34,6 million paid for intangible assets and US$ 16,5 million from capitalization of development expense according to IAS 38. Cash paid for acquisitions, net of cash acquired, of US$ 457,5 million was used primarily in the acquisitions of Cellestis and Ipsogen and includes US$ 3,1 million of cash paid in connection with acquisition milestone achievements. As of December 31, 2011, we also acquired a stake in Alacris for US$ 3,4 million and made an investment of US$ 16,4 million in another privately held company.

In 2009, we purchased the land and building adjacent to our facility in Hilden, Germany for EUR 2,5 million (approximately US$ 3,2 million) to further expand our German facilities for research and development and production. In addition, we started the expansion of our Germantown, Maryland, USA facility for production and administrative space in June 2010. While the construction in Germany is substantially complete, the U.S. expansion projects are expected to continue into 2014, with both projects at an estimated total cost of approximately US$ 94,0 million. We anticipate that we will be able to fund these expansions with cash generated by operating activities.

In connection with certain acquisitions, we could be required to make additional contingent cash payments totaling up to US$ 103,1 million based on the achievement of certain revenue and operating results milestones as follows: US$ 26,5 million in 2012, US$ 11,1 million in 2013, US$ 12,3 million in 2014, US$ 4,7 million in 2015, US$ 6,4 million in 2016 and US$ 42,1 million payable in any 12-month period from now until 2016 based on the accomplishment of certain revenue targets, the launch of certain products or the grant of certain patent rights. Of the US$ 103,1 million total contingent obligation, approximately US$ 39,8 million is accrued as of December 31, 2011.

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Cash Flows from Financing Activities

Financing activities used US$ 315,8 million in cash for the year ended December 31, 2011 compared to US$ 38,2 million for 2010. Cash used during 2011 was primarily related to the repayment of long-term of debt of US$ 469,9 million partially offset by proceeds from debt of US$ 186,3 million. Also in 2011, US$ 37,4 million was used to purchase additional shares of Ipsogen’s noncontrolling interest. Cash used during 2010 was primarily due to the repayment of US$ 50,0 million of long-term debt and finance lease payments, partially offset by proceeds from debt as well as cash provided by the issuance of common shares in connection with our equity compensation plans and tax benefits from stock-based compensation.

In December 2011, we entered into a EUR 400,0 million syndicated multi-currency revolving credit facility expiring December 2016 of which EUR 110,0 million (approximately US$ 142,3 million) was utilized at December 31, 2011 and is due in 2012. We have additional credit lines totaling US$ 8,6 million at variable interest rates, none of which was utilized as of December 31, 2011. We also have finance lease obligations, including interest, in the aggregate amount of US$ 23,5 million, and carry US$ 576,5 million of long-term debt, of which US$ 146,0 million is current as of December 31, 2011. As of December 31, 2011, we have drawn down EUR 1,6 million under a loan to finance research and development projects of the Company in Germany. The loan bears interest at 3,5% and is due to be fully repaid by 2013.

In July 2007, we signed a Syndicated Multi-Currency Term Loan and Revolving Credit Facilities Agreement with Deutsche Bank AG, Deutsche Bank Luxembourg S.A., and the lenders named in the syndication agreement. We used the proceeds of the term loan and the bridge loan to pay the cash component of the Digene acquisition consideration and the fees and expenses of the Digene offer and the merger. During 2011, we repaid the debt in full.

In August 2004, the Company completed the sale of US$ 150,0 million principal amount of 1,50% convertible unsubordinated notes (Notes) due 2024, through its subsidiary QIAGEN Finance (Luxembourg) S.A. Interest on the Notes is payable semi-annually in February and August. The Notes were issued at 100% of principal value, and are convertible into 11,5 million shares of common shares at the option of the holder upon the occurrence of certain events at a price of US$ 12,6449 per share, subject to adjustment. In November 2008, the Company issued 395.417 common shares upon the exercise of a portion of the subscription rights in connection with the conversion of US$ 5,0 million of the Notes. The Notes may be redeemed, in whole or in part, at QIAGEN’s option on or after 7 years, at 100% of the principal amount provided the actual trading price of our common stock exceeds 120% of the conversion price for twenty consecutive trading days. In addition, the holders of the Notes may require QIAGEN to repurchase all or a portion of the outstanding Notes for 100% of the principal amount, plus accrued interest, on August 18, 2011, 2014 and 2019. The effective interest rate of the Notes amounts to 5,20%. The Company has reserved 11,5 million shares of common stock for issuance in the event of conversion.

In May 2006, the Company completed the sale of US$ 300,0 million principal amount of 3,25% senior convertible notes (2006 Notes) due 2026, through its subsidiary QIAGEN Euro Finance (Luxembourg) S.A. Interest on the 2006 Notes is payable semi-annually in May and November. The 2006 Notes were issued at 100% of principal value, and are convertible into 15,0 million shares of common shares at the option of the holder upon the occurrence of certain events at a price of US$ 20,00 per share, subject to adjustment. The 2006 Notes cannot be called for the first 7 years and are callable thereafter subject to a provisional call trigger of 130% of the conversion price. In addition, the holders of the 2006 Notes may require QIAGEN to repurchase

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all or a portion of the outstanding Notes for 100% of the principal amount, plus accrued interest, on May 16, 2013, 2017 and 2022. The effective interest rate of the Notes amounts to 7,3%. The Company has reserved 15,0 million of common stock for issuance in the event of conversion.

We expect that cash from financing activities will continue to be impacted by issuances of our common shares in connection with our equity compensation plans and that the market performance of our stock will impact the timing and volume of the issuances. Additionally, we may make future acquisitions or investments requiring cash payments, the issuance of additional equity or debt financing.

We believe that funds from operations, existing cash and cash equivalents, together with the proceeds from our public and private sales of equity, and availability of financing facilities, will be sufficient to fund our planned operations and expansion during the coming year. However, the global economic downturn may have a greater impact on our business than currently expected, and we may experience a decrease in the sales of our products, which could impact our ability to generate cash. The availability of debt financing has also been negatively impacted by the global credit crisis. If our future cash flows from operations and other capital resources are not adequate to fund our liquidity needs, we may be required to obtain additional debt or equity financing or to reduce or delay our capital expenditures, acquisitions or research and development projects. If we could not obtain financing on a timely basis or at satisfactory terms, or implement timely reductions in our expenditures, our business could be adversely affected.

Employees

As of December 31, 2011, we employed 3.938 individuals, of which 19% worked in research and development, 39% in sales, 23% in production/logistics, 7% in marketing and 12% in administration.

|  | Americas |  |  | Europe |  |  | Asia Pacific |  |  | Total |
Research & development |  |  | 153 |  |  |  | 556 |  |  |  | 49 |  |  |  | 758 |
Sales |  |  | 511 |  |  |  | 555 |  |  |  | 443 |  |  |  | 1.509 |
Production |  |  | 238 |  |  |  | 583 |  |  |  | 103 |  |  |  | 924 |
Marketing |  |  | 55 |  |  |  | 179 |  |  |  | 47 |  |  |  | 281 |
Administration |  |  | 115 |  |  |  | 270 |  |  |  | 81 |  |  |  | 466 |
Employees |  |  | 1.072 |  |  |  | 2.143 |  |  |  | 723 |  |  |  | 3.938 |

At December 31, 2010, we employed 3.587 individuals, respectively. None of our employees is represented by a labor union or subject to a collective bargaining agreement. Management believes that its relations with employees are good.

Our success depends, to a significant extent, on key members of our management and our scientific staff. The loss of such employees could have a material adverse effect on QIAGEN. Our ability to recruit and retain qualified skilled personnel to perform future research and development work will also be critical to our success. Due to the intense competition for experienced scientists from numerous Pharmaceutical and biotechnology companies and academic and other research institutions, there can be no assurance that we will be able to attract and retain such personnel on acceptable terms. Our planned activities will also require additional personnel, including management, with expertise in areas such as manufacturing and marketing, and the development of such expertise by existing management personnel. The inability to acquire such personnel or develop such expertise could have a material adverse impact on our operations.

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Compensation of Directors and Officers

Reference is made to the disclosures in the Corporate Governance Report.

Research and Development

QIAGEN invests more in research and development than most companies in our industry. We are committed to expanding QIAGEN’s global leadership in Sample & Assay Technologies as rapid advances in molecular biology open up new and useful applications.

Our strategy for managing innovation focuses on addressing the most significant unmet medical and scientific needs. We target our resources to develop the most promising technologies for use by our customers in Molecular Diagnostics, Applied Testing, Pharma and Academia – and to meet the needs of healthcare professionals and scientists in key geographic markets.

Innovation at QIAGEN follows parallel paths:

| • |  | Creating new systems for automation of workflows – platforms for laboratories, hospitals and other users of these novel molecular technologies.

| • |  | Expanding our broad portfolio of “content” – in particular, novel assays to detect and characterize molecular structures and biomarkers for disease or genetic identification.

More than 700 employees in research and development work in eight centers of excellence on four continents. Our comprehensive intellectual property portfolio spans more than 1.000 granted patents and more than 1.000 pending applications.

Innovations in instrumentation are strengthening our leadership in the automation of these technologies, driving dissemination of molecular technologies in healthcare and other fields, and generating increased demand for QIAGEN consumable products. We continue to extend our modular, medium-throughput QIAsymphony platform, enabling hospitals and other customers to adopt or greatly expand their use of Molecular Diagnostics. QIAsymphony RGQ, designed to allow fully integrated processing from initial sample to final result, has expanded the QIAsymphony installed base since the launch of the fully integrated system in late 2010. We plan to integrate modules in the future for specialized needs such as pyrosequencing. In 2011, we updated development plans for the QIAensemble system, a high-throughput platform based on the same core technologies of QIAsymphony, including plans to enable migration of QIAGEN assays between the two platforms.

QIAGEN is commercializing a deep pipeline of content: molecular assays for preventive screening and diagnostic profiling of diseases, tests for important biomarkers to guide personalized cancer therapies, and assays for a broad range of other targets. The rollout of QIAsymphony RGQ is accompanied by an extensive development program involving assays for Molecular Diagnostics and other customer classes. Regulatory submissions planned for 2012 include companion diagnostics for cancer drugs targeting EGFR (epidermal growth factor receptor) in the U.S. and the BRAF gene in the European Union and molecular and pre-molecular assays for the infectious disease CMV (cytomegalovirus). In Applied Testing, QIAGEN continues to develop new content for human identification, food safety and veterinary diagnostics. We are also expanding

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our extensive portfolio of products for disease pathway research by Pharma and Academic customers. In addition, we are developing assays for specific applications in key markets such as China and Japan. The combined markets for QIAGEN’s current assay development portfolio total more than $1 billion in potential annual sales.

In addition, QIAGEN has invested in co-development of companion diagnostics for personalized healthcare through projects with Pharmaceutical and biotech companies. We have created a center of excellence in companion diagnostics in Manchester, U.K. These programs typically begin with development of targeted assays to assist our customers in the clinical development of new drugs by identifying patient populations most likely to respond favorably to specific therapies. The collaborations have potential to develop into companion diagnostics mark.

Risks Related to Our Business and Risk Management

The Company has identified various risk factors for its business which are set forth in detail below. There may be current risks that the Company has not yet fully assessed or which are currently qualified as minor but which could have a material impact on the performance of the Company at a later stage. The Managing Board has developed and implemented strategies, controls and mitigation measures to identify current and developing risks as part of the Company’s risk management system. The Company has a variety of functional experts to evaluate and attempt to mitigate and manage its business risks. These groups and their respective main areas of focus are presented in detail in the Corporate Governance Report.

Risks Related to the Growth of Our Business

An inability to manage our growth, manage the expansion of our operations, or successfully integrate acquired businesses could adversely affect our business.

Our business has grown rapidly, with total net sales increasing to nearly US$ 1,2 billion in 2011 from US$ 893,0 million in 2008. We have made several acquisitions in recent years, including Cellestis Ltd. in August 2011 and purchased a majority of Ipsogen S.A. shares in July 2011. Other acquisitions include SABiosciences and DxS Ltd. in 2009; Corbett Life Science Pty. Ltd., or Corbett, in 2008; and Digene Corporation, or Digene, in 2007. We intend to identify and acquire other businesses in the future that support our strategy to build on our global leadership position in Sample & Assay technologies. The successful integration of acquired businesses requires a significant effort and expense across all operational areas.

We have also made significant investments to expand our business operations. In January 2009, we purchased land adjacent to our facility in Germany and in August 2009 began a major expansion project to create additional facilities for research and development as well as to expand production capacity. This expansion project was substantially completed by the end of 2011. In addition, we began a project in June 2010 to expand our facility in Germantown, Maryland, for research, production and administrative space, and this project is expected to continue into 2014. These expansion projects increase our fixed costs, resulting in higher operational costs in the future that will negatively impact our gross profit and operating income until we fully utilize the additional capacity of these planned facilities. We also continue to upgrade our operating and financial systems and expand the geographic presence of our operations, which has resulted in the hiring of new employees as well as increased responsibilities for both existing and new management personnel. The rapid expansion of our business and the addition of new personnel may place a strain on our management and operational systems.

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Our future operating results will depend on the ability of our management to continue to implement and improve our research, product development, manufacturing, sales and marketing and customer support programs, enhance our operational and financial control systems, expand, train and manage our employee base, integrate acquired businesses, and effectively address new issues related to our growth as they arise. There can be no assurance that we will be able to manage our recent or any future expansion or acquisitions successfully, and any inability to do so could have a material adverse effect on our results of operations.

Our acquisitions expose us to new risks, and we may not achieve the anticipated benefits of acquisitions of technologies and businesses.

During the past several years, we have acquired and integrated a number of companies through which we have gained access to new technologies, products and businesses that complement our internally developed product lines. In the future, we expect to acquire additional technologies, products or businesses to expand our operations. Acquisitions expose us to new operating and other risks, including risks associated with the:

| • |  | assimilation of new products, technologies, operations, sites and personnel;

| • |  | application for and achievement of regulatory approvals or other clearances;

| • |  | diversion of resources from our existing business and technologies;

| • |  | generation of sales to offset associated acquisition costs;

| • |  | implementation and maintenance of uniform standards and effective controls and procedures;

| • |  | maintenance of relationships with employees and customers and integration of new management personnel;

| • |  | issuance of dilutive equity securities;

| • |  | incurrence or assumption of debt;

| • |  | amortization or impairment of acquired intangible assets or potential businesses; and

| • |  | exposure to liabilities of and claims against acquired entities.

Our failure to address the above risks successfully in the future may prevent us from achieving the anticipated benefits from any acquisition in a reasonable time frame, or at all.

Our continued growth is dependent on the development and success of new products.

Rapid technological change and frequent new product introductions are typical in the markets we serve. Our future success will depend in part on continuous, timely development and introduction of new products that address evolving market requirements. We believe successful new product introductions provide a significant competitive advantage because customers make an investment of time in selecting and learning to use a new product and are reluctant to switch thereafter. To the extent that we fail to introduce new and innovative products, or such products suffer significant delays in development or are not accepted in the market, we may lose market share to our competitors, which will be difficult or impossible to regain. An inability to successfully develop and introduce new products, for technological or other reasons, could reduce our growth rate or otherwise have an adverse effect on our business. In the past, we have experienced delays in the development and introduction of products, including regulatory approvals, and we may experience delays in the future.

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As a result, we cannot assure you that we will keep pace with the rapid rate of change in our markets or that our new products will adequately meet the requirements of the marketplace, achieve market acceptance or regulatory approval or compete successfully with competitive technologies. Some of the factors affecting market acceptance of new products include:

| • |  | availability, quality and price relative to competitive products;

| • |  | the timing of introduction of the new product relative to competitive products;

| • |  | opinions of the new product’s utility;

| • |  | citation of the new product in published research;

| • |  | regulatory trends and approvals; and

| • |  | general trends in life sciences research, applied markets and Molecular Diagnostics.

The expenses or losses associated with unsuccessful product development activities or lack of market acceptance of our new products could materially adversely affect our business, financial condition and results of operations.

Important new product programs underway include our modular medium-throughput QIAsymphony automation platform and our high-throughput QIAensemble automation platform and related Sample & Assay Technologies.

The speed and level of adoption of our QIAsymphony platform will affect sales of instrumentation but also of sample and assay kits designed to run on this system. In 2011 we exceeded our goal of reaching an installed based of 550 QIAsymphony systems, driven by the global rollout of QIAsymphony RGQ, our complete sample-to-result platform that was launched in late 2010. We have established a target of more than 750 QIAsymphony systems installed by year-end 2012. The rollout of QIAsymphony is intended to drive the dissemination and increasing sales of sample and assay kits that run on this platform, and we are seeking regulatory approvals for a number of these new products. In turn, the availability and regulatory approval of more tests to run on QIAsymphony, especially molecular assays for specific diseases or companion diagnostics paired with new drugs, will influence the value of the instruments to prospective buyers. The risk of slower adoption of QIAsymphony or the complete QIAsymphony RGQ system could significantly affect sales of products designed to run on these platforms.

The launch of the QIAensemble Decapper in late 2011, similarly, is an automation platform that affects sales of our test kits, primarily to high-throughput laboratories that run our HPV test to screen women for risk of cervical cancer. The level of acceptance of this instrument in the marketplace, and the development of future enhancements for the QIAensemble system, could significantly affect sales of products designed to run in the high-throughput setting.

Global economic conditions could adversely affect our business, results of operations and financial condition.

Our results of operations could be materially affected by adverse general conditions in the global economy and global financial markets. In times of economic hardship or high unemployment, patients may decide to forego or delay routine tests, in particular for our HPV test used to screen women for risk of cervical cancer. Changes in the availability or reimbursement of our molecular diagnostic testing products by insurance providers and healthcare maintenance organizations could also have a significant adverse impact on our results of operations.

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Access to financing in the global financial markets has also been adversely affected for many businesses during the recent challenging economic times and public debt crisis. The uncertainty surrounding the resolution of the economic and sovereign debt crisis in Europe continues to have a negative impact on financial markets and economic conditions more generally. Our customers may face internal financing pressures that adversely impact spending decisions, the ability to purchase our products or that lead to a delay in collection of receivables and thus negatively impact our cash flow. A severe or prolonged economic downturn could result in a variety of risks to our business that would adversely impact our results of operations, including the reduction or delay in planned improvements to healthcare systems in various countries, the reduction of funding for life sciences research, and intensified efforts by governments and healthcare payors regarding cost-containment efforts.

As is the case for many businesses, we face the following risks in regard to financial markets:

| • |  | severely limited access to financing over an extended period of time, which may limit our ability to fund our growth strategy and could result in delays to capital expenditures, acquisitions or research and development projects;

| • |  | failures of currently solvent financial institutions, which may cause losses from our short-term cash investments or our hedging transactions due to a counterparty’s inability to fulfill its payment obligations;

| • |  | inability to refinance existing debt at competitive rates, reasonable terms or sufficient amounts; and

| • |  | increased volatility or adverse movements in foreign currency exchange rates.

Our concentration of a significant portion of revenues in products related to HPV testing increases our dependence on that product group’s success, our reliance on relationships with a relatively small number of customers particularly in the United States, and our reliance on a diversification strategy to increase sales in other product areas.

Contributions in 2011 from global sales of our HPV test products represent approximately 20% of our total net sales, of which approximately 15% were in the United States. While the ultimate decision to order this test is made by physicians in consultation with their patients, in the U.S. the test analysis is generally performed by reference laboratories, who in turn are the customers of QIAGEN in terms of ordering tests and related equipment. At present, a limited number of reference laboratories in the U.S. account for the majority of HPV test sales. In times of economic hardship or high unemployment patients may decide to forego or delay routine tests, as was the case during the second half of 2010 and during much of 2011 in the U.S. Further, the cost of HPV testing in the U.S. is reimbursed to reference laboratories by insurance providers and health maintenance organizations. If these insurance plans decide to limit the availability of payments for our test to their members, it could have a significant adverse impact on our results of operations. Growth in other areas through diversification and new product launches has reduced the proportion of total net sales coming from HPV tests in the U.S., but if we fail to further diversify, we could be at risk that under-performance of the HPV line or loss of a customer could materially affect results of operations.

Our sales of HPV products will be affected by the level of acceptance of HPV screening by physicians and laboratories.

Sales of our HPV-related Molecular Diagnostics products depend upon our ability to develop greater acceptance by physicians and laboratories of the clinical benefits of HPV screening as a necessary part of the standard of care for screening women for risk of cervical cancer, either alone or in conjunction with cytology-based tests (Pap smears).

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This applies to the U.S. as well as Europe and other markets around the world. Pap tests have been the principal means of cervical cancer screening since the 1940s. Our HPV test is supported by extensive clinical data showing its significant benefits in better identifying women at risk for cervical cancer than a Pap test alone, and standards of care in the U.S. now recommend HPV tests in conjunction with Pap tests. In the U.S. approximately 45% of cervical cancer screening includes co-testing of molecular HPV tests along with Pap smears. These standards are also being adopted in other countries around the world. However, technological advances designed to improve quality control over sample collection and preservation, as well as to reduce the susceptibility of Pap tests to human error, may increase physician reliance on the Pap test and solidify its market position as the most widely used screening test.

HPV testing applies a new molecular-based approach that is different from the cytology-based approach (reviewing cells under a microscope) of the Pap test. Significant resources are required to educate physicians and laboratories about the patient benefits that can result from using HPV test products in addition to the Pap test, and to assist laboratory customers in learning how to use our HPV test products. The addition of our HPV test products to the Pap test for primary screening in the United States may be seen by some customers as adding unnecessary expense to traditional cervical cancer screening. As a result, our ability to continue to grow revenues from HPV testing in the U.S. and around the world depends on providing information on the proven benefits of using our molecular technologies to identify women at risk for cervical cancer

We may encounter delays in receipt, or limits in the amount, of reimbursement approvals and public health funding, which will impact our ability to grow revenues in the healthcare market.

Third-party payors are often reluctant to reimburse healthcare providers for the use of medical tests that involve new technologies or provide novel diagnostic information. In addition, third-party payors are increasingly limiting reimbursement coverage for medical diagnostic products and, in many instances, are exerting pressure on diagnostic product suppliers to reduce their prices. Since each third-party payor often makes reimbursement decisions on an individual patient basis, obtaining such approvals is a time-consuming and costly process that requires us to provide scientific and clinical data supporting the clinical benefits of each of our products. As a result, there can be no assurance that reimbursement approvals will be obtained. This process can delay the broad market introduction of new products, and could have a negative effect on our results of operations. As a result, third-party reimbursement may not be consistent or financially adequate to cover the cost of our products. This could limit our ability to sell our products or cause us to reduce prices, which would adversely affect our results of operations.

Reduction in research and development budgets and government funding may result in reduced sales.

Our customers include researchers at pharmaceutical and biotechnology companies, academic institutions, and government and private laboratories. Fluctuations in the research and development budgets of these organizations could have a significant adverse effect on demand for our products. Research and development budgets are affected by changes in available resources, the mergers of pharmaceutical and biotechnology companies, changes in spending priorities and institutional budgetary policies. Our results of operations could be adversely affected by any significant decrease in expenditures for life sciences research and development by pharmaceutical and biotechnology companies, academic institutions, and government and private laboratories. In addition, short-term changes in administrative, regulatory or purchasing-related procedures can create uncertainties or other impediments that can have an adverse impact on our results of operations.

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In recent years, the pharmaceutical and biotechnology industries have undergone substantial restructuring and consolidation. Additional mergers or consolidation within the pharmaceutical and biotechnology industries could cause us to lose existing customers and potential future customers, which could have a material adverse impact on our results of operations.

Approximately 25% of our sales are generated from demand for our products used in the Academia customer class by researchers at universities, government laboratories and private foundations, and whose funding is dependent upon grants from government agencies, such as the U.S. National Institutes of Health (NIH). Although the level of research funding has been increasing in recent years, we cannot assure you that this trend will continue given federal and state budget constraints. Government funding of research and development is subject to the political process, which is inherently unpredictable. Future sales may be adversely affected if our customers delay purchases as a result of uncertainties regarding the approval of government or industrial budget proposals. Also, government proposals to reduce or eliminate budgetary deficits have sometimes included reduced allocations to the NIH and government agencies in other countries that fund life sciences research and development activities. A reduction in government funding for the NIH or government research agencies in other countries could have a serious adverse impact on our results of operations.

Competition could reduce our sales.

We face various competitive factors against greater adoption of our products, in particular the use of “home-brew” methods, where widely available reagents and other chemicals are used in a non-standardized manner to perform sample and assay processing. We are also aware that a significant number of laboratory organizations and competitor companies are developing and using their own internally developed molecular assay tests. Some competitor companies may seek regulatory approvals from the U.S. Food and Drug Administration (FDA) or similar non-U.S. regulatory authorities and bring to the market alternative products that could limit the use of our products. The success of our business depends in part on the continued conversion of current users of “home brew” methods to our standardized Sample & Assay Technologies and products. There can be no assurance, however, as to the continued conversion of these potential customers.

We have experienced, and expect to continue to experience, increasing competition from companies that provide competitive pre-analytical solutions and also other products used by our customers. The markets for some of our products are very competitive and price sensitive. Other product suppliers may have significant advantages in terms of financial, operational, sales and marketing resources as well as experience in research and development. These companies may have developed, or could develop in the future, new technologies that compete with our products or even render our products obsolete. The development of products offering superior technology or a more cost-effective alternative to our products could have a material adverse effect on our results of operations.

We believe that customers in the market for pre-analytical solutions and assay technologies display a significant amount of loyalty to their initial supplier of a particular product, in particular given the time and expense required by customers to properly implement these products into their operations. As a result, it may be difficult to convert customers who have purchased products from competitors, and our competitive position may suffer if we are unable to be the first to develop and supply new products.

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Risks Related to the Development, Manufacture and Distribution of Our Products

The time and expense needed to obtain regulatory approval and respond to changes in regulatory requirements could adversely affect our ability to commercially distribute our products and generate sales.

We and our customers operate in a highly regulated environment characterized by continuous changes in the governing regulatory framework, particularly for product approvals. Genetic research activities and products commonly referred to as “genetically engineered” (such as certain food and therapeutic products) are subject to extensive governmental regulation in most developed countries, especially in the major markets for pharmaceutical and diagnostic products such as the European Union, the U.S. and Japan. In recent years, several highly publicized scientific events (most notably in genomic research and “cloning”) have prompted intense public debates on the ethical, philosophical and religious implications of an unlimited expansion in genetic research and the use of products emerging from this research. As a result of this debate, some key countries may increase existing regulatory barriers, which could adversely affect demand for our products and prevent us from fulfilling our growth expectations. Furthermore, there can be no assurance that any future changes of applicable regulations will not require further expenditures or an alteration, suspension or liquidation of our operations in certain areas, or even in their entirety.

Changes in the existing regulations or adoption of new requirements or policies could adversely affect our ability to sell our approved products or to seek approvals for new products in other countries around the world. Future sales of certain products now in development may be dependent upon us successfully conducting pre-clinical studies, clinical trials and other tasks required to gain regulatory approvals. These trials could be subject to extensive regulation by governmental authorities in the U.S., particularly the FDA, and regulatory agencies in other countries. These trials involve substantial uncertainties and could impact customer demand for our products.

In addition, certain products, especially those intended for use in in vitro diagnostics applications, require regulatory approvals in various countries. For example, since the European Union Directive 98/79/EC on in vitro diagnostic medical devices, or EU-IvD-D, went into effect in 2003, all products and kits used for in vitro diagnostic applications must be compliant with this directive. In addition to high-risk products such as HIV testing systems (list A of Annex II of the directive) or blood glucose testing systems (list B of Annex II of the directive), nucleic acid purification products, which are used in diagnostic workflows, are affected by this regulatory framework. The major goals of this directive are to standardize diagnostic procedures within the European Union, to increase reliability of diagnostic analysis and to enhance patient safety. If we fail to obtain any required clearance or approvals, it could significantly damage our business in these markets.

Additionally, we may be required to incur significant costs to comply with laws and regulations in the future, and changes or additions to existing laws or regulations may have a material adverse effect upon our business, financial condition and results of operations.

Several of our key products and programs are medical devices subject to extensive regulation by the FDA under the Federal Food, Drug and Cosmetic Act. We plan to apply for FDA clearance or approval of additional products in the future as medical devices. Regulatory agencies in other countries also have medical device approval regulations that are becoming more extensive. These regulations govern most commercial activities associated with medical devices, including indications for the use of these products as well as other aspects

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that include product development, testing, manufacturing, labeling, storage, recordkeeping, advertising and promotion. Compliance with these regulations is expensive and time-consuming. Our HPV products were the first to obtain regulatory approval in the U.S. and in many European countries for clinical use in screening women for cervical cancer, which adds to our marketing expenses and increases the degree of regulatory review and oversight. The expense of submitting regulatory approval applications in multiple countries, as compared to our available resources, will impact the decisions we make about entering new markets.

Each medical device that we wish to distribute commercially in the U.S. will likely require us to seek either 510(k) clearance or approval of a pre-market approval application (PMA) from the FDA prior to marketing the device for in-vitro diagnostic use. Clinical trials related to our regulatory submissions take years to complete and represent a significant expense. The 510(k) clearance pathway usually takes from three to twelve months, but can take longer. The PMA pathway is more costly, lengthy and uncertain, and can take from one to three years, or longer. For example, it took more than four years to receive pre-market approval from the FDA for our HPV test product for use as a test for the presence of HPV in women with equivocal Pap test results and pre-market approval for the use of our HPV test as a primary adjunctive cervical cancer screening test to be performed in combination with the Pap test for women age 30 and older. The uncertain time period required for regulatory review increases our costs to develop new products and increases the risk that we will not succeed in introducing or selling new products in the U.S.

Our cleared or approved devices, including our diagnostic tests and related equipment, are subject to numerous post-approval requirements. We are subject to inspection and marketing surveillance by the FDA to determine our compliance with regulatory requirements. If the FDA determines that we have failed to comply, it can institute a wide variety of enforcement actions, ranging from warning letters to more severe sanctions such as fines, injunctions and civil penalties, recalls or seizures of our products, operating restrictions, partial suspension or total shutdown of production, denial of our requests for 510(k) clearance or pre-market approval of product candidates, withdrawal of 510(k) clearance or pre-market approval already granted and criminal prosecution. Any enforcement action by the FDA may affect our ability to commercially distribute these products in the U.S.

Some of our products are sold for research purposes in the U.S. We do not promote these products for clinical diagnostic use, and they are labeled “For Research Use Only” (RUO) or “for molecular biology applications”. If the FDA were to disagree with our designation of a product, we could be forced to stop selling the product until appropriate regulatory clearance or approval has been obtained. Further, some of our products are used in “Laboratory Developed Tests” (LDT), where laboratories use our materials for assays manufactured, validated and performed in house. We do not promote these products for clinical diagnostic use. If the FDA were to stop the practice of LDTs, sales of our products in the U.S. could be adversely affected.

Further, the FDA has announced its intention to begin regulating lab-developed tests (LDTs) in a phased-in approach, but details of proposed regulations have not yet emerged. LDTs represent the majority of molecular tests currently in use in terms of volume, and our automation systems – particularly the QIAsymphony platform – are designed to accommodate the automation and validation of these tests. The flexibility to handle LDTs is an advantage for these instruments. On the consumables side, LDTs can be competitors to our own commercially approved tests. We are pursuing a strategy of developing new content for our platforms partly by seeking regulatory approvals for new assays in Molecular Diagnostics, as well as approvals for these tests to run on QIAGEN instruments. We believe standardized tests that pass regulatory scrutiny may be attractive not only to reference laboratories and healthcare providers, but also to translational researchers in Pharma and

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Academia using molecular assays to develop and study products they expect to commercialize. On the other hand, laboratories creating LDTs may use some of our materials in their tests. We do not promote these products for clinical diagnostic use, but if the FDA were to stop the use of LDTs, sales of some of our products in the U.S. could be adversely affected. At this point the ultimate impact of potential new FDA policies on lab-developed tests is uncertain

We depend on suppliers for materials used to manufacture our products, and if shipments from these suppliers are delayed or interrupted, we may be unable to manufacture our products.

We buy materials to create our products from a number of suppliers and are not dependent on any one supplier or group of suppliers for our business as a whole. However, key components of certain products, including certain instrumentation components and chemicals, are available only from a single source. If supplies from these vendors are delayed or interrupted for any reason, we may not be able to obtain these materials timely or in sufficient quantities or qualities in order to produce certain products, and this could have an adverse impact on our results of operations.

We rely on collaborative commercial relationships to develop some of our products.

Our long-term business strategy involves entering into strategic alliances as well as marketing and distribution arrangements with academic, corporate and other partners relating to the development, commercialization, marketing and distribution of certain of our existing and potential products. We may be unable to continue to negotiate these collaborative arrangements on acceptable terms, and these relationships also may not be scientifically or commercially successful. In addition, we may be unable to maintain these relationships, and our collaborative partners may pursue or develop competing products or technologies, either on their own or in collaboration with others.

For example, our Personalized Healthcare business includes projects with pharmaceutical and biotechnology companies to co-develop companion diagnostics paired with drugs that those companies either market currently or are developing for future use. The success of these co-development programs, including regulatory approvals for the companion diagnostics, depends upon the continued commitment of our Pharma partners to development of those drugs, the outcome of clinical trials for the drugs and diagnostics, and regulatory approvals of the paired diagnostic tests and drugs. In addition, the future level of sales for companion diagnostics that we bring to market depends, in some measure, on the commercial success of the relevant drugs. More companion diagnostics would be sold in combination with a widely prescribed drug than a drug with limited use. Hence, the future success of these diagnostics depends on our Pharma partners’ actions and commercial success.

Some of our customers are requiring us to change our sales arrangements to lower their costs, and this may limit our pricing flexibility and harm our business.

Some of our customers have developed purchasing initiatives to reduce the number of vendors from which they purchase products to lower their supply costs. In some cases, these customers have established agreements with large distributors, which include discounts and direct involvement in the distributor’s purchasing process. These activities may force us to supply large distributors with our products at discounts in order to continue providing products to some customers. For similar reasons, many larger customers, including the U.S. government, have requested, and may request in the future, special pricing arrangements, which can

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include blanket purchase agreements. These agreements may limit our pricing flexibility, which could harm our business and affect our results of operations. For a limited number of customers, and at the customer’s request, we have conducted sales transactions through third-party online intermediaries to whom we are required to pay commissions. If sales grow through these intermediaries, it could have an adverse impact on our results of operations, particularly a negative impact on our gross profit.

We heavily rely on air cargo carriers and other overnight logistics services, and shipping delays or interruptions could harm our business.

Our customers in the scientific research markets typically only keep a modest inventory of our products on hand, and consequently require overnight delivery of purchases. As a result, we heavily rely on air cargo carriers and logistic suppliers. If overnight services are suspended or delayed, and other delivery carriers and logistic suppliers cannot provide satisfactory services, customers may suspend a significant amount of their work. The lack of adequate delivery alternatives would have a serious adverse impact on our results of operations.

Risks Related to Our Operations

Our success depends on the continued employment of our key personnel, any of whom we may lose at any time.

Our senior management consists of an Executive Committee comprised of the Managing Directors and our most senior executives responsible for core functions, and led by Mr. Peer Schatz, our Chief Executive Officer. The loss of Mr. Schatz or any of our Managing Directors could have a material adverse effect on our operations. Further, although we have not experienced any difficulties attracting or retaining key management and scientific staff, our ability to recruit and retain qualified, skilled employees will continue to be critical to our success. Given the intense competition for experienced scientists among pharmaceutical and biotechnology companies as well as academic and other research institutions, there can be no assurance that we will be able to attract and retain employees critical to our success on acceptable terms. Initiatives to expand QIAGEN will also require additional employees, including management with expertise in areas such as manufacturing and marketing, and the development of existing managers to lead a growing organization. The failure to recruit new employees, or develop existing employees, could have a material adverse impact on our results of operations.

Our ability to accurately forecast our results during each quarter may be negatively impacted by the fact that a substantial percentage of our sales may be recorded in the final weeks or days of the quarter.

The markets we serve are typically characterized by a high percentage of purchase orders being received in the final few weeks or even days of each quarter. Although this varies from quarter to quarter, many customers make a large portion of their purchase decisions late in each quarter, in particular since it is during this period that they receive new information on both their budgets and requirements. As a result, even late in each quarter, we cannot predict with certainty whether our sales forecasts for the quarter will be achieved.

Historically, we have been able to rely on the overall pattern of customer purchase orders during prior periods to project with reasonable accuracy our anticipated sales for the current or coming quarters. However, if customer purchasing trends during a quarter vary from historical patterns as may occur with changes in market

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conditions, our quarterly financial results could deviate significantly from our projections. As a result, our sales forecasts for any given quarter may prove not to have been accurate. We also may not have sufficient, timely information to confirm or revise our sales projections for a specific quarter. If we fail to achieve our forecasted sales for a particular quarter, the value of our Common Shares could be adversely affected.

Changes in tax laws or their application could adversely affect our results of operations.

The integrated nature of our worldwide operations enables us to reduce the effective tax rate on our earnings since a portion of our earnings are taxed at more favorable rates in some jurisdictions. Changes in tax laws or their application with respect to matters such as changes in tax-rates, transfer pricing and income allocation, utilization of tax loss carry forwards, intercompany dividends, controlled corporations, and limitations on tax relief allowed on the interest on intercompany debt, and changes to tax credit mechanisms, could increase our effective tax rate and adversely affect our results of operations.

The U.S. health care reform law could affect our business, profitability and stock price.

Comprehensive healthcare reform legislation was signed into law in the U.S. in 2010. Although we cannot fully predict the many ways in which this healthcare reform might affect our business, the law imposes a 2,3% excise tax on certain transactions, including many sales of medical devices, which we expect will include the U.S. sales of our assays and instruments. This tax will apply to U.S. sales of all taxable medical devices occurring after December 31, 2012. The increased tax burden may adversely affect our results of operations.

We have a significant amount of debt that may adversely affect our financial condition.

We have a significant amount of debt, which creates significant debt service obligations. A high level of indebtedness increases the risk that we may default on our debt obligations. We cannot assure you that we will be able to generate sufficient cash flow to pay the interest on our debt or that future working capital, borrowings or equity financing will be available to repay or refinance our debt. If we are unable to generate sufficient cash flow to pay the interest on our debt, we may have to delay or curtail our research and development programs. The level of our indebtedness could, among other things:

| • |  | make it difficult for us to make required payments on our debt;

| • |  | make it difficult for us to obtain any financing in the future necessary for working capital, capital expenditures, debt service requirements or other purposes;

| • |  | limit our flexibility in planning for, or reacting to, changes in our business and the industry in which we compete; and

| • |  | make us more vulnerable in the event of a downturn in our business.

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Our business may require substantial additional capital, which we may not be able to obtain on terms acceptable to us, if at all.

Our future capital requirements and level of expenses will depend upon numerous factors, including the costs associated with:

| • |  | marketing, sales and customer support efforts;

| • |  | research and development activities;

| • |  | expansion of our facilities;

| • |  | consummation of possible future acquisitions of technologies, products or businesses;

| • |  | demand for our products and services; and

| • |  | repayment or refinancing of debt.

We currently anticipate that our short-term capital requirements will be satisfied by cash flow from our operations. As of December 31, 2011, we had short-term debt of US$ 146.0 million and outstanding long-term loan debt of approximately US$ 430.6 million. Furthermore, as of December 31, 2011, we have finance lease obligations, including the current portion, of US$ 23,5 million, that expire in various years through 2018. We may need to refinance all or part of these liabilities before or at their contractual maturities.

We currently do not foresee that this will happen, but if at some point in time our existing resources should be insufficient to fund our activities, we may need to raise funds through public or private debt or equity financings. The funds for the refinancing of existing liabilities or for the ongoing funding of our business may not be available or, if available, not on terms acceptable to us. If adequate funds are not available, we may be required to reduce or delay expenditures for research and development, production, marketing, capital expenditures and/or acquisitions, which could have a material adverse effect on our business and results of operations. To the extent that additional capital is raised through the sale of equity or convertible securities, the issuance of any securities could result in dilution to our shareholders.

An impairment of goodwill and intangible assets could reduce our earnings.

At December 31, 2011, our consolidated statement of financial position reflected approximately US$ 1,7 billion of goodwill and approximately US$ 891,9 million of intangible assets. Goodwill is recorded when the purchase price of a business exceeds the fair market value of the tangible and separately measurable intangible net assets. IFRS generally requires us to test goodwill for impairment on an annual basis or when events or circumstances occur indicating that goodwill might be impaired. Long-lived assets, such as intangible assets with finite useful lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. If we determine that any of our goodwill or intangible assets were impaired, we would be required to take an immediate charge to earnings and our results of operations could be adversely affected.

Our strategic equity investments may result in losses.

We have made, and may continue to make, strategic investments in complementary businesses as opportunities arise. We periodically review the carrying value of these investments for impairment, considering factors that include the most recent stock transactions, book values from the most recent financial statements, and forecasts and expectations of the investee. The results of these valuations may fluctuate due to market conditions and other conditions over which we have no control.

Estimating the fair value of non-marketable equity investments in life science companies is inherently subjective. If actual events differ from our assumptions and other than temporary unfavorable fluctuations in the valuations of the investments are indicated, we could be required to write-down the investment. This could result in future charges on our earnings that could materially adversely affect our results of operations. It is uncertain whether or not we will realize any long-term benefits from these strategic investments.

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Risk of price controls is a threat to our profitability.

The ability of many of our customers to successfully market their products depends in part on the extent to which reimbursement for the costs of these products is available from governmental health administrations, private health insurers and other organizations. Governmental and other third-party payors are increasingly seeking to contain healthcare costs and to reduce the price of medical products and services. As a result, the biotechnology, diagnostics and pharmaceutical industries are exposed to the potential risk of price controls by these entities. If there are not adequate reimbursement levels, our business and results of operations could be adversely affected.

Risks Related to Our Global Operations

Doing business internationally creates certain risks for our business.

Our business involves operations in several countries outside of the U.S. Our consumable manufacturing facilities are located in Germany, China, the United Kingdom and the U.S., and our instrumentation facilities are located in Switzerland. We have established sales subsidiaries in numerous countries including the U.S., Germany, Japan, the United Kingdom, France, Switzerland, Australia, Canada, the Netherlands, Sweden, Italy, Hong Kong, Singapore, Turkey, Korea, Malaysia, China, Spain, Brazil, Mexico and India. In addition, our products are sold through independent distributors serving more than 40 other countries. Conducting and launching operations on an international scale requires close coordination of activities across multiple jurisdictions and time zones and consumes significant management resources. We have invested heavily in computerized information systems in order to manage more efficiently the widely dispersed components of our operations. If we fail to coordinate and manage these activities effectively, our business and results of operations will be adversely affected.

Our operations are subject to other risks inherent in international business activities, such as general economic conditions in the countries in which we operate, overlap of different tax structures, unexpected changes in regulatory requirements, compliance with a variety of foreign laws and regulations, and longer accounts receivable payment cycles in certain countries. Other risks associated with international operations include import and export licensing requirements, trade restrictions, exchange controls and changes in tariff and freight rates, as may occur as a result of rising energy costs. As a result of these conditions, an inability to successfully manage our international operations could have a material adverse impact on our business and results of operations.

Our business in countries with a history of corruption and transactions with foreign governments increase the risks associated with our international activities.

Based on our international operations, we are subject to the U.S. Foreign Corrupt Practices Act, or the FCPA, the U.K. Bribery Act and other laws that prohibit improper payments or offers of payments to foreign governments and their officials and political parties by business entities for the purpose of obtaining or retaining business. We have operations, agreements with third parties and make sales in countries known to experience corruption. Further international expansion may involve increased exposure to such practices. Our

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activities in these countries create the risk of unauthorized payments or offers of payments by one of our employees, consultants, sales agents or distributors that could be in violation of various laws, including the FCPA, even though these parties are not always subject to our control. It is our policy to implement safeguards to discourage these practices by our employees and distributors. However, our existing safeguards and any future improvements may not prove to be effective, and our employees, consultants, sales agents or distributors may engage in conduct for which we might be held responsible. Violations of the FCPA and other laws may result in criminal or civil sanctions, which could be severe, and we may be subject to other liabilities, which could negatively affect our business, results of operations and financial condition.

Exchange rate fluctuations may adversely affect our business and operating results.

Since we currently market our products throughout the world, a significant portion of our business is conducted in currencies other than the U.S. dollar, our reporting currency. As a result, fluctuations in value, relative to the U.S. dollar, of the currencies in which we conduct our business have caused and will continue to cause foreign currency transaction gains and losses. Foreign currency transaction gains and losses arising from normal business operations are charged against earnings in the period when incurred. We hedge a portion of the anticipated cash flow that we expect to exchange into other currencies, subject to our short-term financing needs. Due to the number of currencies involved, the variability of currency exposures and the potential volatility of currency exchange rates, we cannot predict the effects of future exchange rate fluctuations. While we may engage in foreign exchange hedging transactions to manage our foreign currency exposure, there can be no assurance that our hedging strategy will adequately protect our operating results from the effects of future exchange rate fluctuations.

We have made investments in and are expanding our business into emerging markets and regions, which exposes us to new risks.

We have recently expanded our business into emerging markets in Asia, South America and Africa, and we expect to continue to focus on expanding our business in these fast-growing markets. In addition to the currency and international operation risks described above, our international operations are subject to a variety of risks that include those arising out of the economy, political outlook and language and cultural barriers in countries where we have operations or do business. In many of these emerging markets, we may be faced with several risks that are more significant than in other countries in which we have a history of doing business. These risks include economies that may be dependent on only a few products and are therefore subject to significant fluctuations, weak legal systems which may affect our ability to enforce contractual rights, exchange controls, unstable governments, and privatization or other government actions affecting the flow of goods and currency. In conducting our business, we move products from one country to another and may provide services in one country from a subsidiary located in another country. Accordingly, we are vulnerable to abrupt changes in customs and tax regimes that could have significant negative impacts on our results of operations.

Our global operations may be affected by actions of governments, global or regional economic developments, weather or transportation delays, natural disasters or other force majeure events (collectively, unforeseen events) which may negatively impact our suppliers, our customers or us.

Our business involves operations around the world. Our consumable manufacturing facilities are located in Germany, China and the U.S., and our instrumentation facilities are located in Switzerland. We have

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established sales subsidiaries in numerous countries and our products are sold through independent distributors serving more than 40 additional countries. Our facilities may be harmed by unforeseen events, and in the event we or our customers are affected by a disaster, we may experience delays or reductions in sales or production, or increased costs, or may be required to identify alternate suppliers or rely on third-party manufacturers.

Our instrumentation manufacturing processes are dependent upon certain components provided by third-party suppliers located in Japan, which experienced a severe earthquake followed by a tsunami in March 2011. As a result, to the extent that our suppliers are impacted by an event, we may experience periods of reduced instrumentation production. Any unexpected interruptions in our instrumentation production capabilities may lead to delayed or lost sales and may adversely affect our results of operations for the affected period.

In addition, to the extent we temporarily shutdown any facility following such an unforeseen event, we may experience disruptions in our ability to ship products to customers or otherwise operate our business as a result of the unforeseen event. While our global operations give us the ability to ship product from alternative sites, we may not be able to do so because our customers’ facilities are shutdown or the local logistics infrastructure is not functioning, and our sales will suffer.

Damage to our property due to unforeseen events and the disruption of our business from casualties may be covered by insurance, but this insurance may not be sufficient to cover all of our potential losses and such insurance may not continue to be available to us on acceptable terms, or at all. In addition, we may incur incremental costs following an unforeseen event which will reduce profits and adversely affect our results of operations.

Risks Related to our Intellectual Property

We depend on patents and proprietary rights that may fail to protect our business.

Our success depends to a large extent on our ability to develop proprietary products and technologies and to establish and protect our patent and trademark rights in these products and technologies. As of December 31, 2011, we owned 186 issued patents in the United States, 136 issued patents in Germany and 740 issued patents in other major industrialized countries. In addition, at December 31, 2011, we had 1.045 pending patent applications, and we intend to file applications for additional patents as our products and technologies are developed. The patent positions of technology-based companies, including our Company, involve complex legal and factual questions and may be uncertain, and the laws governing the scope of patent coverage and the periods of enforceability of patent protection are subject to change. In addition, patent applications in the United States are maintained in secrecy until patents issue, and publication of discoveries in the scientific or patent literature tends to lag behind actual discoveries by several months. Therefore, no assurance can be given that patents will issue from any patent applications that we own or license or if patents do issue, that the claims allowed will be sufficiently broad to protect our technology. In addition, no assurance can be given that any issued patents that we own or license will not be challenged, invalidated or circumvented, or that the rights granted thereunder will provide us competitive advantages. Further, as issued patents expire, we may lose some competitive advantage as others develop competing products and as a result, we may lose revenue.

A significant portion of HPV-related intellectual property is in the public domain, while additional HPV-related intellectual property is subject to our patents some of which will begin to expire in the next few years or are licensed to us on a non-exclusive basis. As a result, other companies have developed or may develop HPV detection tests.

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Certain of our products incorporate patents and technologies that are licensed from third parties and for certain products, these in-licensed patents together with other patents provide us with a competitive advantage. These licenses impose various commercialization, sublicensing and other obligations on us. Our failure to comply with these requirements could result in the conversion of the applicable license from being exclusive to non-exclusive or, in some cases, termination of the license, and as a result, we may lose some competitive advantage and experience a loss of revenue.

We also rely on trade secrets and proprietary know-how, which we seek to protect through confidentiality agreements with our employees and consultants. There can be no assurance that any confidentiality agreements that we have with our employees, consultants, outside scientific collaborators and sponsored researchers and other advisors will provide meaningful protection for our trade secrets or adequate remedies in the event of unauthorized use or disclosure of such information. There also can be no assurance that our trade secrets will not otherwise become known or be independently developed by competitors.

We currently engage in, and may continue to engage in, collaborations with academic researchers and institutions. There can be no assurance that under the terms of such collaborations, third parties will not acquire rights in certain inventions developed during the course of these collaborations.

We are subject to risks associated with patent litigation.

The biotechnology industry has been characterized by extensive litigation regarding patents and other intellectual property rights. We are aware that patents have been applied for and/or issued to third parties claiming technologies for the sample and assay technologies that are closely related to those we use. From time to time, we receive inquiries requesting confirmation that we do not infringe patents of third parties. We endeavor to follow developments in this field, and we do not believe that our technologies or products infringe any proprietary rights of third parties. However, there can be no assurance that third parties will not challenge our activities and, if so challenged, that we will prevail. In addition, the patent and proprietary rights of others could require that we alter our products or processes, pay licensing fees or cease certain activities, and there can be no assurance that we will be able to license any technologies that we may require on acceptable terms. In addition, litigation, including proceedings that may be declared by the U.S. Patent and Trademark Office or the International Trade Commission, may be necessary to respond to any assertions of infringement, enforce our patent rights and/or determine the scope and validity of our proprietary rights or those of third parties. Litigation could involve substantial cost, and there can be no assurance that we would prevail in any proceedings.

Risks Related to Product Liability Issues

Our business exposes us to potential product liability.

The marketing and sale of our products and services for certain applications entail a potential risk of product liability. Although we are not currently subject to any material product liability claims, product liability claims may be brought against us in the future. Further, there can be no assurance that our products will not be included in unethical, illegal or inappropriate research or applications, which may in turn put us at risk of

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litigation. We carry product liability insurance coverage, which is limited in scope and amount, but that we believe is currently appropriate for us. There can be no assurance, however, that we will be able to maintain this insurance at a reasonable cost and on reasonable terms, or that this insurance will be adequate to protect us against any or all potential claims or losses.

We are subject to various laws and regulations generally applicable to businesses in the different jurisdictions in which we operate, including laws and regulations applicable to the handling and disposal of hazardous substances. Although we believe that our procedures for the handling and disposal of hazardous materials comply with the standards prescribed by applicable regulations, the risk of accidental contamination or injury from these materials cannot be completely eliminated. In the event of such an accident, we could be held liable for any damages that result, and any such liability could have a material adverse impact on us.

Risks Related to Our Common Shares

Our operating results may vary significantly from period to period and this may affect the market price of our Common Shares.

Our operating results may vary significantly from quarter to quarter, and also from year to year, since they are dependent upon a broad range of factors that include demand for our products, the level and timing of customer research budgets and commercialization efforts, the timing of government funding budgets of our customers, the timing of our research and development activities and related regulatory approvals, the impact of sales and marketing expenses, the introduction of new products by us or our competitors, competitive market conditions, exchange rate fluctuations and general economic conditions. Our expense levels are based in part on our expectations as to future sales trends. As a result, sales and earnings may vary significantly from quarter to quarter or from year to year, and actual sales and earnings results in any one period will not necessarily be indicative of results to be anticipated in subsequent periods. Our results may also fail to meet or exceed the expectations of securities analysts or investors, which could cause a decline in the market price of our Common Shares.

Our holding company structure makes us dependent on the operations of our subsidiaries.

QIAGEN N.V. is incorporated under Dutch law as a public limited liability company (naamloze vennootschap), and is organized as a holding company. Currently, the material assets are the outstanding shares of the QIAGEN subsidiaries, intercompany receivables and other financial assets such as cash and short-term investments. As a result, QIAGEN N.V. is dependent upon payments, dividends and distributions from the subsidiaries for funds to pay operating and other expenses as well as to pay future cash dividends or distributions, if any, to holders of our Common Shares. Dividends or distributions by subsidiaries in a currency other than the U.S. dollar may result in a loss upon a subsequent conversion into U.S. dollars.

U.S. civil liabilities may not be enforceable against us.

We are incorporated under Dutch law, and substantial portions of our assets are located outside of the U.S. In addition, certain members of our Managing and Supervisory Boards and our officers reside outside the U.S. As a result, it may be difficult for investors to effect service of process within the U.S. upon us or such other persons, or to enforce outside the U.S. any judgments obtained against such persons in U.S. courts, in any action, including actions predicated upon the civil liability provisions of U.S. securities laws.

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In addition, it may be difficult for investors to enforce, in original actions brought in courts in jurisdictions located outside the U.S., rights predicated upon the U.S. securities laws. There is no treaty between the U.S. and the Netherlands for the mutual recognition and enforcement of judgments (other than arbitration awards) in civil and commercial matters. As a result, a final judgment for the payment of money rendered by any federal or state court in the U.S. based on civil liability, whether or not predicated solely upon the federal securities laws, would not be directly enforceable in the Netherlands. However, if the party in whose favor such final judgment is rendered brings a new suit in a competent court in the Netherlands, such party may submit to the Dutch court the final judgment which has been rendered in the U.S. If the Dutch court finds that the jurisdiction of the federal or state court in the U.S. has been based on grounds that are internationally acceptable and that proper legal procedures have been observed, the Dutch court will, in principle, give binding effect to the final judgment which has been rendered in the U.S. unless such judgment contravenes Dutch principles of public policy. Based on the foregoing, there can be no assurance that U.S. investors will be able to enforce against us, members of our Managing or Supervisory Boards, or officers who are residents of the Netherlands or countries other than the U.S. any judgments obtained in U.S. courts in civil and commercial matters, including judgments under the federal securities laws. In addition, there is doubt as to whether a Dutch court would impose civil liability on us, the members of our Managing or Supervisory Boards, or our officers in an original action predicated solely upon the federal securities laws of the U.S. brought in a court of competent jurisdiction in the Netherlands against us or such members or officers, respectively.

Our Common Shares may have a volatile public trading price.

The market price of our Common Shares since our initial public offering in September 1996 has increased significantly and been highly volatile. In the last two years, the price of our Common Shares has ranged from a high of US$ 24,00 to a low of US$ 12,47 on NASDAQ, and a high of EUR 17,87 to a low of EUR 9,07 on the Frankfurt Stock Exchange. In addition to overall stock market fluctuations, factors that may have a significant impact on the price of our Common Shares include:

| • |  | announcements of technological innovations or the introduction of new products by us or our competitors;

| • |  | developments in our relationships with collaborative partners;

| • |  | quarterly variations in our operating results or those of our peer companies;

| • |  | changes in government regulations or patent laws;

| • |  | developments in patent or other intellectual property rights;

| • |  | developments in government spending budgets for life sciences-related research;

| • |  | general market conditions relating to the diagnostics, applied testing, pharmaceutical and biotechnology industries; and

| • |  | impact from foreign exchange rates.

The stock market has from time to time experienced extreme price and trading volume fluctuations that have particularly affected the market for technology-based companies. These fluctuations have not necessarily been related to the operating performance of these companies. These broad market fluctuations may adversely affect the market price of our Common Shares.

Holders of our Common Shares should not expect to receive dividend income.

We have not paid cash dividends since our inception and do not anticipate paying any cash dividends on our Common Shares for the foreseeable future. Although we do not anticipate paying any cash dividends, the

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distribution of any cash dividends in a currency other than the U.S. dollar will be subject to the risk of foreign currency transaction losses. Investors should not invest in our Common Shares if they are seeking dividend income; the only return that may be realized through investing in our Common Shares would be through an appreciation in the share price.

Shareholders who are United States residents could be subject to unfavorable tax treatment.

We may be classified as a “passive foreign investment company,” or a PFIC, for U.S. federal income tax purposes if certain tests are met. Our treatment as a PFIC could result in a reduction in the after-tax return to holders of Common Shares and would likely cause a reduction in the value of these shares. If we were determined to be a PFIC for U.S. federal income tax purposes, highly complex rules would apply to our U.S. shareholders. We would be considered a PFIC with respect to a U.S. shareholder if for any taxable year in which the U.S. shareholder held the Common Shares, either (i) 75% or more of our gross income for the taxable year is passive income; or (ii) the average value of our assets (during the taxable year) which produce or are held for the production of passive income is at least 50% of the average value of all assets for such year. Based on our income, assets and activities, we do not believe that we were a PFIC for U.S. federal income tax purposes for our taxable year ended December 31, 2011, and do not expect to be a PFIC for the current taxable year or any future taxable year. No assurances can be made, however, that the Internal Revenue Service will not challenge this position or that we will not subsequently become a PFIC. In countries outside the U.S., other or similar tax regimes may apply and result in unfavorable tax treatment for any dividends received.

Future sales and issuances of our Common Shares could adversely affect our stock price.

Any future sale or issuance of a substantial number of our Common Shares in the public market, or any perception that a sale may occur, could adversely affect the market price of our Common Shares. Under Dutch law, a company can issue shares up to its authorized share capital provided for in its Articles of Association. Pursuant to our Articles of Association, our authorized share capital amounts to EUR 9,0 million, which is divided into 410,0 million common shares, 40,0 million financing preference shares and 450,0 million preference shares, with all shares having a EUR 0,01 par value. As of December 31, 2011, a total of approximately 234,2 million Common Shares were outstanding along with approximately 12,2 million additional shares reserved for issuance upon exercise or release of outstanding stock options and awards, of which 5,5 million were vested. A total of approximately 22,2 million Common Shares are reserved and available for issuances under our stock plans as of December 31, 2011, including the shares subject to outstanding stock options and awards. The majority of our outstanding Common Shares are free for sale, except shares held by our affiliates, which are subject to certain limitations on resale. Additionally, holders of notes issued by QIAGEN Finance (Luxembourg) S.A. and QIAGEN Euro Finance (Luxembourg) S.A. are entitled to convert their notes into approximately 26,5 million Common Shares, subject to adjustments in certain cases.

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Provisions of our Articles of Association and Dutch law and an option we have granted may make it difficult to replace or remove management and may inhibit or delay a takeover.

Our Articles of Association, or Articles, provide that our shareholders may only suspend or dismiss our Managing Directors and Supervisory Directors against their wishes with a vote of two-thirds of the votes cast if such votes represent more than 50% of our issued share capital. If the proposal was made by the joint meeting of the Supervisory Board and the Managing Board, a simple majority is sufficient. The Articles also provide that if the members of our Supervisory Board and our Managing Board have been nominated by the joint meeting of the Supervisory Board and Managing Board, shareholders may only overrule this nomination with a vote of two-thirds of the votes cast if such votes represent more than 50% of our issued share capital.

Certain other provisions of our Articles allow us, under certain circumstances, to prevent a third party from obtaining a majority of the voting control of our Common Shares through the issuance of Preference Shares. Pursuant to our Articles and the resolution adopted by our General Meeting of Shareholders on October 11, 2007, our Supervisory Board is entitled to issue Preference Shares in case of an intended takeover of our company by (i) any person who alone or with one or more other persons, directly or indirectly, have acquired or given notice of an intent to acquire (beneficial) ownership of an equity stake which in aggregate equals 20% or more of our share capital then outstanding or (ii) an “adverse person” as determined by the Supervisory Board. If the Supervisory Board opposes an intended takeover and authorizes the issuance of Preference Shares, the bidder may withdraw its bid or enter into negotiations with the Managing Board and/or Supervisory Board and agree on a higher bid price for our Shares.

In 2004 (as amended in 2008), we granted an option to the Stichting Preferente Aandelen QIAGEN, or the Foundation (Stichting), whereby the exercise of the option by the Foundation is subject to the conditions described in the paragraph above and which option allows the Foundation to acquire Preference Shares from us. The option enables the Foundation to acquire such number of Preference Shares as equals the number of our outstanding Common Shares at the time of the relevant exercise of the option, less one Preference Share. When exercising the option and exercising its voting rights on these Preference Shares, the Foundation must act in our interest and the interests of our stakeholders. The purpose of the Foundation option is to prevent or delay a change of control that would not be in the best interests of us and our stakeholders. An important restriction on the Foundation’s ability to prevent or delay a change of control is that a public offer must be announced by a third party before it can issue (preference or other) protective shares that would enable the Foundation to exercise rights to 30% or more of the voting rights without an obligation to make a mandatory offer for all shares held by the remaining shareholders. In addition, the holding period for these shares by the Foundation is restricted to two years, and this protective stake must fall below the 30% voting rights threshold before the two-year period ends.

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Reporting in accordance with Directive 2004/25/EC of the European Parliament and of the Council of April 21. 2004, on takeover bids

Structure of our capital, including securities which are not admitted to trading on a regulated market in a Member State of the European Union

The authorized classes of our shares consist of common shares, Financing Preference Shares and Preference Shares. No Financing Preference Shares or Preference Shares have been issued.

As of December 31, 2011, we had outstanding approximately 234,2 million common shares plus approximately 12,2 million additional shares reserved for issuance upon exercise or release of outstanding stock options and awards, of which 5,5 million were vested. A total of approximately 22,2 million common shares are reserved and available for issuances under our stock plans as of December 31, 2010, including those shares subject to outstanding stock options and awards. The majority of our outstanding common shares are freely saleable except shares held by our affiliates, which are subject to certain limitations on resale. Additionally, holders of notes issued by QIAGEN Finance (Luxembourg) S.A. and QIAGEN Euro Finance (Luxembourg) S.A. are entitled to convert their notes into approximately 26,5 million common shares, subject to adjustments in certain cases.

Restrictions on the transfer of securities

Common shares are issued in registered form only. Common shares are available either without issue of a sharecertificate, or Type I shares, or with issue of a share certificate, or Type II shares, in either case in the form of an entry in the share register. At the discretion of the Supervisory Board, Type I shares may be issued and the holders of such Type I shares will be registered in either our shareholders register with American Stock Transfer & Trust Company, or New York Transfer Agent, our transfer agent and registrar in New York, or our shareholder register with TMF FundServices B.V., Westblaak 89, NL-3012 KG Rotterdam, the Netherlands. The Type II shares are registered with our New York Transfer Agent.

The transfer of registered shares requires that we issue a written instrument of transfer and the written acknowledgement of such transfer (or, in the case of Type II shares, the New York Transfer Agent (in our name)), and surrender of the share certificates, if any, to us or (in our name) to the New York Transfer Agent. Upon surrender of a share certificate for the purpose of transfer of the relevant shares, we (or the New York Transfer Agent in our name) acknowledge the transfer by endorsement on the share certificate or by issuance of a new share certificate to the transferee, at the discretion of the Managing Board.

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Significant direct and indirect shareholdings

The following table sets forth certain information as of December 31, 2011, concerning the ownership of common shares of each holder of greater than five percent ownership. None of these holders have any different voting rights than other holders of our common shares.

Name and Country of Residence |  | Shares Beneficially Owned Number2) |  |  | Percent Ownership1) |
BlackRock, Inc., United States |  |  | 13.094.141 |  |  |  | 5,59 | %

(1) | The percentage ownership was calculated based on 234.220.808 common shares issued and outstanding as of December 31, 2011.

(2) | Of the 13,094,141 shares attributed to BlackRock, Inc., it has sole voting power and sole dispositive power over all 13,094,141 shares. This information is based solely on the Schedule 13G filed by BlackRock, Inc. with the Securities and Exchange Commission on February 9, 2012, which reported ownership as of December 31, 2011.

Our common stock is traded on the NASDAQ Global Select Market in the United States, and on the Prime Standard Segment of the Frankfurt Stock Exchange in Germany. A significant portion of our shares are held in street name, therefore we generally have no way of determining who our shareholders are, their geographical location or how many shares a particular shareholder owns. As of January 27, 2012, there were 197 shareholders of record of our common shares.

Holders of any securities with special control rights

Not applicable.

System of control of any employee share scheme where the control rights are not exercised directly by the employees

Not applicable.

Restrictions on voting rights

At the General Meeting, each share shall confer the right to cast one vote, unless otherwise provided by law or the Articles. No votes may be cast in respect of shares that we or our subsidiaries hold, or by usufructuaries and pledges of shares. All shareholders and other persons entitled to vote at General Meetings are entitled to attend General Meetings, to address the meeting and to vote. They must notify the Managing Board in writing of their intention to be present or represented not later than on the third day prior to the day of the meeting, unless the Managing Board permits notification within a shorter period of time prior to any such meeting. Subject to certain exceptions, resolutions may be passed by a simple majority of the votes cast.

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Agreements between shareholders which are known to the Company and may result in restrictions on the transfer of securities and/or voting rights

Not applicable.

Rules governing the appointment and replacement of board members and the amendment of the articles of association

Supervisory Directors and Managing Directors are appointed annually for the period beginning on the date following the Annual General Meeting up to and including the date of the Annual General Meeting held in the following fiscal year.

Managing Directors shall be appointed by the general meeting upon the joint meeting of the Supervisory board and the Managing Board, or Joint Meeting, having made a binding nomination for each vacancy. However, the General Meeting may at all times overrule the binding nature of such a nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half the issued share capital. This is different from the provisions of many American corporate statutes, including the Delaware General Corporation Law, which give the directors of a corporation greater authority in choosing the executive officers of a corporation. Under our Articles, the general meeting may suspend or dismiss a managing director at any time. The Supervisory Board shall also at all times be entitled to suspend (but not to dismiss) a Managing Director. The Articles provide that the Supervisory Board may adopt management rules governing the internal organization of the Managing Board.

The Supervisory Directors shall be appointed by the General Meeting upon the Joint Meeting having made a binding nomination for each vacancy. If during a financial year a vacancy occurs in the Supervisory Board, the Supervisory Board may appoint a Supervisory Director who will cease to hold office at the next Annual General Meeting. Under Dutch law and the Dutch Corporate Governance Code, a Supervisory Director must excuse him or herself in the case of any conflict of interest. Decisions to enter into transactions under which a Supervisory Director would have a conflict of interest that are of material significance to QIAGEN and/or to the Supervisory Director concerned, require the approval of the Supervisory Board. Under our Articles, the General Meeting may suspend or dismiss a Supervisory Director at any time. This is different from the provisions of many American corporate statutes, including the Delaware General Corporation Law, which provides that directors may vote to fill vacancies in the board of directors of a corporation.

The Selection and Appointment Committee prepares the selection criteria and appointment procedures for members of our Supervisory Board and the Managing Board; periodically evaluates the scope and composition of the Managing Board and Supervisory Board and proposes the profile of the Supervisory Board in relation thereto. Additionally, the Committee periodically evaluates the functioning of individual members of the Managing Board and Supervisory Board and reports the results thereof to the Supervisory Board and proposes the (re-)appointments of members of our Managing Board and Supervisory Board. The Committee prepares and submits to the Supervisory Board on an annual basis a report of its deliberations and findings.

A resolution of the General Meeting to amend the Articles, dissolve QIAGEN, issue shares or grant rights to subscribe for shares or limit or exclude any pre-emptive rights to which shareholders shall be entitled is valid only if proposed to the General Meeting by the Supervisory Board.

A resolution of the General Meeting to amend the Articles is further only valid if the complete proposal has been made available for inspection by the shareholders and the other persons entitled to attend General Meetings at our offices as from the day of notice convening such meeting until the end of the meeting. A resolution to amend the Articles to change the rights attached to the shares of a specific class requires the approval of the relevant class meeting.

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Powers of board members and in particular the power to issue or buy back shares

The Managing Board manages QIAGEN and is responsible for achieving QIAGEN’s aims, strategy, policies and results. The Managing Board is also responsible for complying with all relevant legislation and regulations, for managing the risks associated with the activities of QIAGEN and the financing of QIAGEN. It reports related developments to and discusses the internal risk management and control systems with the Supervisory Board and the Audit Committee. The Managing Board is accountable for the performance of its duties to the Supervisory Board and the General Meeting of Shareholders. The Managing Board provides the Supervisory Board with timely information necessary for the exercise of the duties of the Supervisory Board. In discharging its duties, the Managing Board takes into account the interests of QIAGEN, its enterprise and all parties involved in QIAGEN, including shareholders and other stakeholders.

The members of our Supervisory Board have the powers assigned to them by Dutch law and the Articles. The Supervisory Board assists the Managing Board by providing advice relating to the business activities of QIAGEN. In discharging its duties, the Supervisory Board takes into account the interests of QIAGEN, its enterprise and all parties involved in QIAGEN, including shareholders and other stakeholders. In particular, the Supervisory Board has the authority to (i) issue common shares up to its presently authorized capital of 410 million, (ii) issue Financing Preference Shares up to its presently authorized capital of 40 million (iii) grant rights to subscribe for such common shares and Financing Preference Shares and (iv) exclude or limit the pre-emptive rights of existing shareholders relating to up to 50% of the number of common shares to be issued or rights to subscribe for common shares.

We may acquire our own shares, subject to certain provisions of Dutch law and the Articles, if (i) shareholders’ equity less the payment required to make the acquisition does not fall below the sum of paid-up and called up capital and any reserves required by Dutch law or the Articles and (ii) we and our subsidiaries would not thereafter hold shares with an aggregate par value exceeding one-tenth of our issued share capital. Shares that we hold in our own capital or shares held by one of our subsidiaries may not be voted. The Managing Board, subject to the approval of the Supervisory Board, may effect our acquisition of shares in our own capital. Our acquisitions of shares in our own capital may only take place if the General Meeting has granted to the Managing Board the authority to effect such acquisitions. Such authority may apply for a maximum period of 18 months and must specify the number of shares that may be acquired, the manner in which shares may be acquired and the price limits within which shares may be acquired. On June 30, 2010, the General Meeting resolved to extend the authorization of the Managing Board in such manner that the Managing Board may cause us to acquire shares in our own share capital, up to 10% of the outstanding shares, for an 18-month period beginning June 30, 2010, or until December 30, 2011, without limitation at a price between one Euro cent (Euro 0,01) and one hundred ten percent (110%) of the price for such shares on the NASDAQ Global Select Market for the five trading days prior to the day of purchase, or, with respect to Preference and Finance Preference shares, against a price between one Euro cent (Euro 0,01) and three times the issuance price and in accordance with applicable provisions of Dutch law and our Articles.

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Significant agreements to which the Company is a party and which take effect alter or terminate upon a change of control of the Company following a takeover bid

Certain other provisions of our Articles allow us, under certain circumstances, to prevent a third party from obtaining a majority of the voting control of our common shares by issuing preference shares. Pursuant to our Articles and the resolution adopted by our General Meeting on June 16, 2004, QIAGEN’s Supervisory Board is entitled to resolve to issue Preference Shares in case of an intended take-over of our Company by (i) any person who alone or with one or more other persons, directly or indirectly, have acquired or given notice of an intent to acquire (beneficial) ownership of an equity stake which in aggregate equals 20% or more of our share capital then outstanding or (ii) an “adverse person” as determined by the Supervisory Board. If the Supervisory Board opposes an intended take-over and authorizes the issuance of preference shares, the bidder may withdraw its bid or enter into negotiations with the Managing Board and/or Supervisory Board and agree on a higher bid price for our shares.

In 2004 (as amended in 2008), we granted an option to the Stichting Preferente Aandelen QIAGEN (the “Foundation” (Stichting)), whereby the exercise of the option by the Foundation is subject to the conditions described in the paragraph above and which option allows the Foundation to acquire preference shares from us. The option enables the Foundation to acquire such number of preference shares as equals the number of our outstanding common shares at the time of the relevant exercise of the right less one share. When exercising the option and exercising its voting rights on such shares, the Foundation must act in our interest and the interests of our stakeholders. The purpose of the Foundation option is to prevent or delay a change of control that would not be in the best interests of us and our stakeholders. An important restriction on the Foundation’s ability to prevent or delay a change of control is that issuing (preference or other) protective shares enabling the Foundation to exercise 30% or more of the voting rights without the obligation to make a mandatory offer for all shares held by the remaining shareholders, is only allowed after a public offer has been announced by a third party. In addition, the holding of such a block of shares by the Foundation is restricted to two years and as a consequence, the size of the protective stake will need to be decreased below the 30% voting rights threshold before the two year period lapses.

During 2005, we adopted the QIAGEN N.V. Amended and Restated 2005 Stock Plan (the Plan) which was approved by our shareholders on June 14, 2005. Pursuant to the Plan, stock rights, which include options to purchase our common shares, stock grants and stock-based awards, may be granted to employees and consultants of QIAGEN and its subsidiaries and to Supervisory Directors. An aggregate of 22.000.000 common shares have been reserved for issuance pursuant to the Plan, subject to certain antidilution adjustments. Options granted pursuant to the Plan may either be incentive stock options within the meaning of Section 422 of the United States Internal Revenue Code of 1986, as amended (the Code), or non-qualified stock options. Options granted to members of the Supervisory Board and the Managing Board must have an exercise price that is higher than the market price at the time of grant. Generally, each of the options has a term of ten years, subject to earlier termination in the event of death, disability or other termination of employment.

The Plan is administered by the Compensation Committee of the Supervisory Board, which selects participants from among eligible employees, consultants and directors and determines the number of shares subject to the option, the length of time the option will remain outstanding, the manner and time of the option’s exercise, the exercise price per share subject to the option and other terms and conditions of the option consistent with the Plan. The Compensation Committee’s decisions are subject to the approval of the Supervisory Board.

The vesting and exercisability of certain stock rights will be accelerated in the event of a Change of Control. A “Change of Control” means the occurrence of a merger or consolidation of QIAGEN, whether or not approved by the Board of Directors, other than a merger or consolidation which would result in the voting securities of QIAGEN outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or the parent of such corporation) at least 50% of

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the total voting power represented by the voting securities of QIAGEN or such surviving entity or parent of such corporation, as the case may be, outstanding immediately after such merger or consolidation, or the stockholders of QIAGEN approve an agreement for the sale or disposition by QIAGEN of all or substantially all of QIAGEN’s assets.

Certain of our employment contracts contain provisions which guarantee the payments of certain amounts in the event of a change in control, as defined in the agreements, or if the executive is terminated for reasons other than cause, as defined in the agreements. At December 31, 2011, the commitment under these agreements totaled US$ 19,2 million (2010: US$ 19,4 million).

Agreements between the Company and its board members or employees providing for compensation if they resign or are made redundant without valid reason or if their employment ceases because of a takeover bid

The members of the Managing Board are appointed annually by the General Meeting of Shareholders based on the nomination of the Joint Meeting. Further, the members of the Managing Board have entered into employment agreements with QIAGEN N.V. and other QIAGEN affiliates. The term of these agreements varies for each Managing Board member due to individual arrangements and goes beyond the one year term of appointment by the General Meeting of Shareholders. These agreements cannot be terminated without cause and, absent such cause, have to be fulfilled during their stated term. There are no arrangements for any extra compensation in case of resignation or redundancy.

The members of the Supervisory Board are also appointed annually by the General Meeting of Shareholders based on the nomination of the Joint Meeting. There are no additional employments in place and there are no arrangements for any extra compensation in case of resignation or redundancy. The General Meeting determines the remuneration of the members of the Supervisory Board.

Subsequent Events

Based on the Company’s review, no other events or transactions have occurred subsequent to December 31, 2011, that would have a material impact on the financial statements as presented.

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Outlook

From our inception, we have believed that sample and assay technologies for nucleic acids and proteins would play an increasingly important role in cutting-edge molecular biology and that major new commercial uses of nucleic acids would be developed. We have been supplying customers with proprietary products for the processing of nucleic acids since 1986. Customers include major academic institutions and governmental laboratories, such as the NIH, as well as leading Pharmaceutical and biotechnology companies. In addition, fundamental developments in recent years have created significant new opportunities for us in the emerging markets of nucleic acid-based Molecular Diagnostics, such as HPV-testing or personalized healthcare, and Applied Testing (or the use of Molecular Diagnostics outside of human healthcare), such as forensics, veterinary diagnostics, testing of genetically modified organism, or GMO, and other food testing, drug discovery and development. In response to these opportunities, we are currently targeting our products and marketing activities to each of these markets.

Venlo, The Netherlands, April 2012
Peer M. Schatz
Chief Executive Officer

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Corporate Governance Report

This section provides an overview of QIAGEN’s corporate governance structure and includes details of the information required under the Dutch Corporate Governance Code (the “Code”). The Code is applicable to QIAGEN N.V. (in the following also referred to as the “Company”), as it is a publicly listed company incorporated under the laws of the Netherlands with a registered seat in Venlo, the Netherlands. The Code contains the principles and concrete provisions which the persons involved in a listed company (including Managing Board members and Supervisory Board members) and stakeholders should observe in relation to one another.

QIAGEN recognizes the importance of clear and straightforward rules on corporate governance and, where appropriate, has adapted its internal organization and processes to these rules.

Corporate Structure

QIAGEN is a public company with limited liability (naamloze vennootschap) incorporated under Dutch law similar to a “Corporation” (Inc.) in the United States. QIAGEN has a two-tiered board structure. QIAGEN is managed by a Managing Board, which is supervised and advised by a Supervisory Board. It is in the interest of QIAGEN and all its stakeholders that each Board performs its functions appropriately and that there is a clear division of responsibilities between the Managing Board, the Supervisory Board, the general meeting of shareholders (“General Meeting”) and the external auditor in a well-functioning system of checks and balances.

Managing Board

General

The Managing Board is responsible for the management and the general affairs of QIAGEN as well as defining and achieving QIAGEN’s aims, strategy, policies and results. The Managing Board is also responsible for complying with all relevant legislation and regulations as well as for managing the risks associated with the business activities and the financing of QIAGEN. It reports related developments to and discusses the internal risk management and control systems with the Supervisory Board and the Audit Committee. The Managing Board is accountable for the performance of its duties to the Supervisory Board and the General Meeting. The Managing Board provides the Supervisory Board with timely information necessary for the exercise of the duties of the Supervisory Board. In discharging its duties, the Managing Board takes into account the interests of QIAGEN, its enterprises and all parties involved in QIAGEN, including shareholders and other stakeholders.

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Composition and appointment

QIAGEN has also established an Executive Committee, of which four members currently serve as Managing Directors of QIAGEN.

Our Managing Board currently consists of the following individuals:

Name |  | Age* |  |  | Position
Peer M. Schatz |  |  | 46 |  |  | Managing Director, Chief Executive Officer
Roland Sackers |  |  | 43 |  |  | Managing Director, Chief Financial Officer
Dr. Joachim Schorr |  |  | 51 |  |  | Managing Director, Senior Vice President Research and Development
Bernd Uder |  |  | 54 |  |  | Managing Director, Senior Vice President Global Sales

* | As of January 27, 2012

The Managing Board consists of one or more members as determined by the Supervisory Board. The members of the Managing Board are appointed by the General Meeting upon the joint meeting of the Supervisory Board and the Managing Board (the “Joint Meeting”) having made a binding nomination for each vacancy. However, the General Meeting may at all times overrule the binding nature of such a nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half the issued share capital. Managing Directors are appointed annually for the period beginning on the date following the Annual General Meeting up to and including the date of the Annual General Meeting held in the following year.

Members of the Managing Board may be suspended and dismissed by the General Meeting by a resolution adopted by a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital, unless the proposal was made by the Joint Meeting, in which case a simple majority of votes cast is sufficient. Furthermore, the Supervisory Board may at any time suspend (but not dismiss) a member of the Managing Board.

Conflicts of interest

Resolutions to enter into transactions under which members of the Managing Board could have a conflict of interest with QIAGEN, and which are of material significance to QIAGEN and/or the relevant member of the Managing Board, require the approval of the Supervisory Board. QIAGEN has not entered into any such transactions in 2011.

Remuneration

The remuneration granted to the members of the Managing Board in 2011 consisted of a fixed salary and other variable components, with the significant majority of remuneration awarded in the form of QIAGEN equity.

Variable compensation included annual payments linked to business performance (bonuses), as well as long-term equity incentives that were awarded based on individual performance. Stock options granted to the Managing Board members must have an exercise price that is higher than the market price at the time of grant. Restricted Share Units granted to the Managing Board members, vest over a 10-year period. Some of these grants contain vesting hurdles related to the achievement of specific operational and financial goals that are not disclosed due to confidential reasons. The long-term vesting periods are designed to strengthen the Managing Board members’ commitment to QIAGEN and achieving its strategic initiatives, which in turn would benefit shareholders and other stakeholders.

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The tables below state the amounts earned on an accrual basis by our Managing Board members in 2011.

|  | Peer M. |  |  | Roland |  |  | Dr. Joachim |  |  | Bernd |
(in US$ thousands, except for number of share grants and options) |  | Schatz |  |  | Sackers |  |  | Schorr |  |  | Uder |
Fixed Salary |  |  | 1.305 |  |  |  | 576 |  |  |  | 366 |  |  |  | 370 |
Other |  |  | 1 |  |  |  | 26 |  |  |  | 38 |  |  |  | 15 |
Total fixed income 2011 |  |  | 1.306 |  |  |  | 602 |  |  |  | 404 |  |  |  | 385 |
Short-term variable cash bonus |  |  | 539 |  |  |  | 194 |  |  |  | 138 |  |  |  | 141 |
Total short-term income 2011 |  |  | 1.845 |  |  |  | 796 |  |  |  | 542 |  |  |  | 526 |
Defined contribution on benefit plan |  |  | 91 |  |  |  | 93 |  |  |  | 35 |  |  |  | 57 |
Number of stock options granted 2011 |  |  | 112.653 |  |  |  | 37.815 |  |  |  | 17.231 |  |  |  | 16.652 |
Related recognized compensation expense |  |  | 436 |  |  |  | 146 |  |  |  | 67 |  |  |  | 64 |
Number of restricted stock units granted 2011 |  |  | 388.427 |  |  |  | 130.385 |  |  |  | 29.705 |  |  |  | 28.708 |
Related recognized compensation expense |  |  | 1.606 |  |  |  | 539 |  |  |  | 123 |  |  |  | 119 |

The total recognized compensation expense in accordance with IFRS 2 in the year 2011 (2010) for stock options and restricted stock units including recognized expenses for equity awards granted in previous years as well as for any non-periodical share-based payments in kind of a bonus amounted to US$ 7,1 million (US$ 5,8 million) for Mr. Schatz, US$ 2,1 million (US$ 2,0 million) for Mr. Sackers, US$ 1,0 million (US$ 0,9) for Mr. Schorr and US$ 0,9 million (US$ 0,9 million) for Mr. Uder.

Based on such valuations the total compensation including recognized compensation expenses for members of the Managing Board was US$ 15,1 million (US$ 13,2 million), and amounts US$ 9,0 million (US$ 7,6 million) for Mr. Schatz, US$ 3,0 million (US$ 2,8 million) for Mr. Sackers, US$ 1,5 million (US$ 1,4 million) for Mr. Schorr and US$ 1,5 million (US$ 1,4 million) for Mr. Uder. Total non-periodical remuneration according to Dutch Civil Code included in total compensation was US$ 4,1 million (US$ 4,1 million) and amounts to US$ 2,6 million (US$ 2,5 million) for Mr. Schatz, US$ 0,9 million (US$ 0,8 million) for Mr. Sackers, US$ 0,3 million (US$ 0,4 million) for Mr. Schorr and US$ 0,3 million (US$ 0,4 million) for Mr. Uder.

Further details on the composition of remuneration for the Managing Board, and the implementation of the Remuneration Policy during 2011, are disclosed in the Remuneration Report of the Compensation Committee as published on our website at www.qiagen.com.

Supervisory Board

General

The Supervisory Board supervises the policies of the Managing Board, the general course of QIAGEN’s affairs and strategy and the business enterprises we operate. The Supervisory Board assists the Managing Board by providing advice relating to the business activities of QIAGEN. In 2011, the Supervisory Board had nine regular meetings that were held with the attendance of the Managing Board, while certain agenda items were discussed exclusively between the Supervisory Board members. In discharging its duties, the Supervisory Board takes into account the interests of QIAGEN, its enterprise and all parties involved in QIAGEN, including shareholders as well as other stakeholders. The Supervisory Board is responsible for the quality of its own performance. In this respect, the Supervisory Board conducts a self-evaluation on an annual basis.

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Composition and appointment

The Supervisory Board consists of at least three members, or a larger number as determined by the Joint Meeting. Members of the Supervisory Board are appointed by the General Meeting upon the Joint Meeting having made a binding nomination for each vacancy. However, the General Meeting may at all times overrule the binding nature of such a nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half the issued share capital.

The Supervisory Board shall be composed in a way that enables it to carry out its duties properly and enables its members to act critically and independently of one another and of the Managing Board and any particular interests. To that effect, the Supervisory Board has adopted a profile of its size and composition that takes into account the nature of our business, our activities and the desired expertise and background of the members of the Supervisory Board. The current profile of the Supervisory Board can be found on our website. The Supervisory Board has appointed a chairman from its members who has the duties assigned to him by the Articles of Association and the Code.

Members of the Supervisory Board are appointed for one-year terms for the period beginning on the day after the Annual General Meeting up to and including the day of the Annual General Meeting held in the following year. Members of the Supervisory Board may be suspended and dismissed by the General Meeting by a resolution adopted by a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital, unless the proposal was made by the Joint Meeting, in which case a simple majority of votes cast is sufficient.

The Supervisory Board currently consists of the following members:

Name |  | Age |  |  | Position
Prof. Dr. Detlev H. Riesner |  |  | 70 |  |  | Chairman of the Supervisory Board, Supervisory Director and Chairman of the Selection and Appointment Committee
Dr. Werner Brandt |  |  | 58 |  |  | Supervisory Director and Chairman of the Audit Committee
Dr. Metin Colpan |  |  | 56 |  |  | Supervisory Director
Erik Hornnaess |  |  | 74 |  |  | Deputy Chairman of the Supervisory Board, Supervisory Director, Chairman of the Compensation Committee, Member of the Audit Committee and Member of the Selection and Appointment Committee
Prof. Dr. Manfred Karobath |  |  | 70 |  |  | Supervisory Director and Member of the Compensation Committee
Heino von Prondzynski |  |  | 62 |  |  | Supervisory Director and Member of the Audit Committee
Elizabeth Tallett |  |  | 62 |  |  | Supervisory Director and Member of the Audit Committee and Compensation Committee

The Supervisory Director Dr. Vera Kallmeyer passed away in October 2011.

The following is a brief summary of the background of each of the Supervisory Directors. References to “QIAGEN” in relation to periods prior to April 29, 1996, refer to QIAGEN GmbH and its consolidated subsidiaries:

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Professor Dr. Detlev H. Riesner, 70, is a co-founder of the Company. He has been a member of the Supervisory Board since 1996 and was appointed Chairman of the Supervisory Board in 1999, and in 2005, he was also appointed Chairman of the Selection and Appointment Committee. Professor Riesner has held the Chair of Biophysics at the Heinrich-Heine-University in Düsseldorf since 1980 and retired in 2006. He has held the position of Dean of the Science Faculty (1991-92), Vice President of the University (Research) (1996-99) and Director of Technology (1999-2006). In 2007, he became a member of the University’s board of trustees. Prior to that, he was Professor of Biophysical Chemistry at the Darmstadt Institute of Technology and, from 1975 to 1977, Lecturer of Biophysical Chemistry at Hannover Medical School. He has held guest professorships at the Institute of Microbiology, Academia Sinica, Beijing, and the Department of Neurology at the University of California, San Francisco. He received his M.S. in Physics from Hannover Institute of Technology and his Ph.D. from the University of Braunschweig, with post-graduate work at Princeton University. Professor Riesner is either a member of the Supervisory Board or a director of AC Immune S.A., Lausanne; Algiax Pharmaceuticals GmbH (former Spinal Cord Therapeutics), Erkrath; Evocatal GmbH, Düsseldorf; DRK Blutspendedienst West gGmbH and DIWA GmbH, Düsseldorf, Hagen. His memberships in the advisory boards of NewLab Bioquality AG and Direvo AG ended when the companies were sold in 2006. Professor Riesner is also a member of the scientific advisory boards of PrioNet, Canada, and Alberta Prion Research Institute, Canada.

Dr. Werner Brandt, 58, joined the Company’s Supervisory Board in 2007. In the same year, he was appointed Chairman of the Audit Committee. Dr. Brandt has been a member of the Executive Board and the Chief Financial Officer of SAP AG since 2001. From 1999 to 2001, he was a member of the Executive Board and Chief Financial Officer of the German-American healthcare company, Fresenius Medical Care AG, where he also served as Labor Relations Director. From 1992 to 1999, Dr. Brandt was a member of the Managing Board of Baxter Deutschland GmbH and Vice President for European Operations. In this capacity, he was responsible for Baxter’s financial operations in Europe. Dr. Brandt began his career in 1981 at the former Price Waterhouse GmbH (now PricewaterhouseCoopers) in Frankfurt. Dr. Brandt completed his Doctorate in business administration from the Technical University of Darmstadt, Germany in 1991, after studying business administration at the University of Nuremberg-Erlangen, Germany, from 1976 to 1981. Dr. Brandt is currently a member of the Supervisory Board of Deutsche Lufthansa AG.

Dr. Metin Colpan, 56, is a co-founder of the Company and was Chief Executive Officer and a Managing Director from 1985 through 2003. Dr. Colpan has been a member of the Supervisory Board since 2004. Dr. Colpan obtained his Ph.D. and M.S. in Organic Chemistry and Chemical Engineering from the Darmstadt Institute of Technology in 1983. Prior to founding QIAGEN, Dr. Colpan was an Assistant Investigator at the Institute for Biophysics at the University of Düsseldorf. Dr. Colpan has had wide experience in separation techniques, and in the separation and purification of nucleic acids in particular, and has filed many patents in the field. Dr. Colpan currently serves as a Supervisory Board member of Morphosys AG, Munich, Germany, and Qalovis Farmer Automatic Energy GmbH, Laer, Germany. Dr. Colpan previously served as Supervisory Board member of Ingenium Pharmaceuticals AG, GenPat77 Pharmacogenetics AG and GPC Biotech AG, each in Munich, Germany.

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Erik Hornnaess, 74, has been a member of the Supervisory Board since 1998. He joined the Audit Committee in 2002, the Compensation Committee in 2005 and the Selection and Appointment Committee in 2007. He was appointed Deputy Chairman of the Supervisory Board in 2007. Mr. Hornnaess worked for Astra Pharmaceuticals, Sweden, from 1965 until 1979 in various management positions in Sweden, Australia, and Canada and, for the last three years of this period, as the General Manager for the Benelux region (Belgium, The Netherlands and Luxembourg). In 1979, he joined Abbott Laboratories European Headquarters in Paris, France, and from 1982, he was the Area Vice-President of Abbott Diagnostic Division in Europe, Middle-East and Africa, with headquarters in Wiesbaden, Germany. Mr. Hornnaess retired from Abbott Laboratories on March 1, 1997. Additionally, Mr. Hornnaess served as the Vice-President of European Diagnostic Manufacturers Association (EDMA), Brussels, in the period 1995 through 1997. Mr. Hornnaess graduated from Aarhus Handelshojskole, Denmark, with an M.B.A. and obtained a P.M.D. from the Harvard Business School.

Professor Dr. Manfred Karobath, 70, has been a member of the Supervisory Board since 2000 and joined the Compensation Committee in 2005. Prof. Dr. Karobath studied medicine, and from 1967 to 1980, he worked first in the Department of Biochemistry of the University of Vienna and, after a stage as postdoctoral fellow, he joined the Department of Psychiatry where he became Professor of Biological Psychiatry. In 1980, he joined Sandoz Pharma in Basel, first in drug discovery, and later he became Senior Vice President and head of R&D. In 1992, Prof. Dr. Karobath joined Rhone Poulenc Rorer (“RPR”) as President of R&D and Executive Vice President, and later, he became a member of the boards of directors of RPR, Pasteur Mérieux Connaught, Centeon and Rhone Poulenc Pharma. He has received several scientific awards and has published 92 scientific papers.

Heino von Prondzynski, 62, joined the Supervisory Board as well as the Audit Committee in 2007. Mr. von Prondzynski retired in 2005 from Roche where he served as Chief Executive Officer of Roche Diagnostics and a member of the Executive Committee of the Roche Group. Prior to joining Roche in 2000, Mr. von Prondzynski worked at Chiron, first as General Manager and Chief Executive Officer in Germany and Italy, later as President of the Vaccines Division in Emeryville, USA. Mr. von Prondzynski started his career with Bayer in Germany as a sales representative and later worked in Austria and Brazil as General Manager. He studied mathematics, geography and history at Westfälische Wilhelms University of Münster in Germany. Mr. von Prondzynski is a director of Koninklijke Philips Electronics NV, Hospira, Inc. and HTL Strefa. Mr. von Prondzynski was previously a director of Epigenomics AG and Chairman of Nobel Biocare Holding AG.

Elizabeth E. Tallett, 62, has been a Principal of Hunter Partners, LLC, a management company for early to mid-stage pharmaceutical, biotechnology and medical device companies, since 2002. Her senior management experience includes President and CEO of Transcell Technologies Inc., President of Centocor Pharmaceuticals, member of the Parke-Davis Executive Committee, and Director of Worldwide Strategic Planning for Warner-Lambert Company. Ms. Tallett graduated from Nottingham University, England, with dual Bachelor’s degrees with honors in mathematics and economics. She is a member of the board of directors of Principal Financial Group, Inc., Coventry Health Care, Inc., Meredith Corp., IntegraMed America, Inc. Ms. Tallett is currently the Lead Director for both Principal and Coventry Health Care. She was also a director of Varian Inc., Immunicon, Inc. and Varian Semiconductor Equipment Associates, Inc. at times during the past five years. Ms. Tallett was a founding board member of the Biotechnology Council of New Jersey and is a Trustee of Solebury School in Pennsylvania.

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Conflicts of interest

Resolutions to enter into transactions under which members of the Supervisory Board could have a conflict of interest with QIAGEN, and which are of material significance to QIAGEN and/or the relevant member of the Supervisory Board, require the approval of the Supervisory Board plenum. In 2011, neither QIAGEN nor its Supervisory Board members have entered into any such transactions.

Committees

The Supervisory Board has established an Audit Committee, a Compensation Committee and a Selection and Appointment (Nomination) Committee from among its members and can establish other committees as deemed beneficial. The Supervisory Board has approved charters under which each of the committees operates. These charters are published on our website (www.qiagen.com).

Audit Committee

The Audit Committee’s primary duties and responsibilities include, among other things, to serve as an independent and objective party to monitor QIAGEN’s accounting and financial reporting process and internal risk management, control and compliance systems. The Audit Committee also is directly responsible for proposing the external auditor to the Supervisory Board, which then proposes the appointment of the external auditor to the General Meeting. Further, the Audit Committee is responsible for the compensation and oversight of QIAGEN’s external auditor and for providing an open avenue of communication among the external auditor as well as the Management Board and the Supervisory Board. Our Internal Audit department operates under the direct responsibility of the Audit Committee. The Audit Committee currently consists of three members: Dr. Brandt (Chairman), Ms. Tallett, and Mr. Hornnaess. The Audit Committee members are appointed by the Supervisory Board and serve for a term of one year. The Supervisory Board has designated Dr. Brandt as a “financial expert” as defined in provisions III.3.2 and III.5.7 of the Code.

The Audit Committee met six times in 2011 and did meet with the external auditor excluding members of the Managing Board in January 2012. Among other things, the Audit Committee discussed the selection of the external auditor to audit the consolidated financial statements and accounting and records of QIAGEN and its subsidiaries, along with the pre-approval of fees for these services. Further, it reviewed QIAGEN’s compliance with various laws and policies, including the Code of Conduct; reviewed the risk management system; discussed the performance of the external auditor with management; and discussed on a quarterly basis the scope and results of the reviews and audits with the external auditor. The Audit Committee also discussed financial accounting and reporting principles and policies as well as the adequacy of internal accounting, financial and operating controls and procedures with the external auditor and management. These discussions included a review of developments in accounting standards and their impact on QIAGEN’s financial statements. The Audit Committee considered and approved recommendations regarding changes to QIAGEN’s accounting policies and processes. In addition, the Audit Committee reviewed with management and the external auditor all quarterly reports prior to their public release as well as quarterly and annual reports prepared under U.S. GAAP (reported on Forms 6-K and 20-F) for filing with the U.S. Securities and Exchange Commission and the annual report prepared under IFRS. The Audit Committee performs a self-evaluation of its activities on an annual basis.

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Compensation Committee

The Compensation Committee’s primary duties and responsibilities include, among other things, the preparation of a proposal for the Supervisory Board concerning the Remuneration Policy for the Managing Board to be adopted by the General Meeting, the preparation of a proposal concerning the individual compensation of Managing Board members to be adopted by the Supervisory Board and the preparation of the Remuneration Report on compensation policies for the Managing Board to be adopted by the Supervisory Board. The Remuneration Report reviews the implementation of the Remuneration Policy in the most recent year and provides an outline of the Remuneration Policy for the future.

The Compensation Committee currently consists of three members: Mr. Hornnaess (Chairman), Ms. Tallett and Prof. Dr. Karobath. Members are appointed by the Supervisory Board and serve for a term of one year. The Compensation Committee met twelve times in 2011. It reviewed, approved and made recommendations on QIAGEN’s compensation and benefits policies, practices and procedures to ensure that legal and fiduciary responsibilities of the Supervisory Board and the Managing Board are carried out. Further, the Compensation Committee approved equity-based remuneration systems and their application, including stock rights or stock option grants on a monthly basis.

Selection and Appointment Committee

The Selection and Appointment (Nomination) Committee is primarily responsible for the preparation of selection criteria and appointment procedures for members of the Supervisory Board and Managing Board as well as the periodic evaluation of the scope and composition of the Managing Board and the Supervisory Board, including the profile of the Supervisory Board.

Additionally, the Selection and Appointment Committee periodically evaluates the functioning of individual members of the Managing Board and Supervisory Board, reporting these results to our Supervisory Board. It also proposes the (re-)appointments of members of our Managing Board and Supervisory Board and supervises the policy of our Managing Board in relation to selection and appointment criteria for senior management. The Selection and Appointment Committee prepares and submits to our Supervisory Board an annual report of its deliberations and findings.

Current members of the Selection and Appointment Committee are Prof. Dr. Riesner (Chairman) and Mr. Hornnaess. Members are appointed by the Supervisory Board and serve for a one-year term. The Selection and Appointment Committee convened three times in 2011.

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Remuneration

Compensation for the Supervisory Board in 2011 consisted of a fixed retainer compensation, additional retainer amounts for Chairman and Vice Chairman, and committee membership fees. Annual remuneration of the Supervisory Board members is as follows:

• Fee paid to each member of the Supervisory Board |  | € | 30.000 |

Additional compensation payable to members holding the following positions:

• Chairman of the Supervisory Board |  | € | 20.000 |
• Vice Chairman of the Supervisory Board |  | € | 5.000 |
• Chairman of the Audit Committee |  | € | 15.000 |
• Chairman of the Compensation Committee |  | € | 10.000 |
• Fee payable to each member of the Audit Committee |  | € | 7.500 |
• Fee payable to each member of the Compensation Committee |  | € | 5.000 |

Members of the Supervisory Board also receive €1,000 for attending the Annual General Meeting and €1,000 for attending each meeting of the Supervisory Board.

Members of the Supervisory Board receive €1,000 for attending each meeting of any subcommittees (other than the Audit Committee, Compensation Committee and Selection and Appointment Committee).

Supervisory Board members also receive variable cash compensation, which is determined annually by the Compensation Committee pursuant to a formula based on growth of Adjusted Earnings per Share provided that such remuneration will not exceed €5,000 per year.

Supervisory Board members also receive a variable component, in the form of share-based compensation. Stock options granted to the Supervisory Board members must have an exercise price that is higher than the market price at the time of grant.

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The following table summarizes the total compensation paid to the members of the Supervisory Board in 2011:

(in US$ thousands, except for number of share grants and options) |  | Prof. Dr. Detlev Riesner |  |  | Dr. Werner Brandt |  |  | Dr. Metin Colpan |  |  | Erik Hornnaess |  |  | Prof. Dr. Manfred Karobath |  |  | Heino von Prondzynski |  |  | Elizabeth E. Tallett |  |  | Dr. Vera Kallmeyer |
Short-term compensation 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed remuneration |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 21,0 |  |  |  | 14,0 |
Chairman / vice chairman committee |  |  | 28,0 |  |  |  | 21,0 |  |  |  | — |  |  |  | 21,0 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Meeting attendance |  |  | 8,4 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 5,6 |  |  |  | 4,2 |  |  |  | 2,8 |
Committee membership |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10,5 |  |  |  | 7,0 |  |  |  | 6,1 |  |  |  | 5,3 |  |  |  | 3,5 |
Subcommittee meeting attendance |  |  | 4,2 |  |  |  | — |  |  |  | 4,2 |  |  |  | — |  |  |  | 4,2 |  |  |  | 4,2 |  |  |  | — |  |  |  | 1,4 |
Variable cash bonus |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 3,5 |  |  |  | 2,3 |
|  |  | 89,6 |  |  |  | 77,0 |  |  |  | 60,2 |  |  |  | 87,5 |  |  |  | 67,2 |  |  |  | 64,9 |  |  |  | 34,0 |  |  |  | 24,0 |
Long-term compensation 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock options granted |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | — |  |  |  | — |
Related recognized compensation expense |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | — |  |  |  | — |
Number of restricted stock units granted |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | — |  |  |  | — |
Related recognized compensation expense |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | — |  |  |  | — |

The total recognized compensation expense in accordance with IFRS 2 in the year 2011 (2010) for stock options and restricted stock units including recognized expenses for equity awards granted in previous years as well as for any non-periodical share-based payments in kind of a bonus amounted to US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Riesner, US$ 86,6 thousands (US$ 76,0 thousands) for Mr. Brandt, US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Colpan, US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Hornnaess, US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Karobath, US$ 86,6 thousands (US$ 76,0 thousands) for Mr. von Prondzynski.

Based on such valuations the total compensation including recognized compensation expenses for members of the Supervisory Board was US$ 1.064,0 thousands (US$ 953,5 thousands) and amounts US$ 186,2 thousands (US$ 177,5 thousands) for Mr. Riesner, US$ 163,6 thousands (US$ 150,5 thousands) for Mr. Brandt, US$ 156,8 thousands (US$ 151,0 thousands) for Mr. Colpan, US$ 184,1 thousands (US$ 177,0 thousands) for Mr. Hornnaess, US$ 163,8 thousands (US$ 156,0 thousands) for Mr. Karobath, US$ 151,5 thousands (US$ 141,5 thousands) for Mr. von Prondzynski, US$ 33,9 thousands (US$ 0) for Ms. Tallett and US$ 24,0 thousands (US$ 0) for Ms. Kallmeyer. Total non-periodical remuneration according to Dutch Civil Code included in total compensation was US$ 198,4 thousands (US$ 198,6 thousands) and amounts US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Riesner, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Brandt, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Colpan, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Hornnaess, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Karobath, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. von Prondzynski, US$ 3,5 thousands (US$ 0) for Ms. Tallett and US$ 2,3 thousands (US$ 0) for Ms. Kallmeyer.

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In 2004, QIAGEN entered into a consulting agreement with Dr. Metin Colpan, our former Chief Executive Officer and current Supervisory Board member, pursuant to which Dr. Colpan is paid a fee of €2.750 per day for scientific consulting services, subject to adjustment. During 2011, QIAGEN paid approximately US$ 100.000 to Dr. Colpan for scientific consulting services including travel reimbursements under this agreement. No agency or advisory service fees were paid to other members of the Supervisory Board. The agreement with Dr. Colpan terminated in January 2012.

Share Ownership

The following table sets forth certain information as of January 27, 2012, concerning the ownership of common shares by our directors and officers. In preparing the following table, we have relied on information furnished by these individuals.

Name and Country of Residence |  | Shares beneficially Owned (1) Number |  |  | Note |  | Percent Ownership (2) |
Peer M. Schatz, Germany |  |  | 1.606.189 |  |  | (3) |  |  | 0,7 | %
Roland Sackers, Germany |  |  | 24.852 |  |  | (4) |  |  | * |
Dr. Joachim Schorr, Germany |  |  | 0 |  |  | (5) |  |  | * |
Bernd Uder, Germany |  |  | 0 |  |  | (6) |  |  | * |
Prof. Dr. Detlev H. Riesner, Germany |  |  | 1.752.735 |  |  | (7) |  |  | 0,8 | %
Dr. Werner Brandt, Germany |  |  | 6.882 |  |  | (8) |  |  | * |
Dr. Metin Colpan, Germany |  |  | 4.538.703 |  |  | (9) |  |  | 2,0 | %
Erik Hornnaess, Spain |  |  | 11.922 |  |  | (10) |  |  | * |
Professor Dr. Manfred Karobath, Austria |  |  | 2.257 |  |  | (11) |  |  | * |
Heino von Prondzynski, Switzerland |  |  | 882 |  |  | (12) |  |  | * |

* | Indicates that the person beneficially owns less than 0,5% of the common shares issued and outstanding as of January 27, 2012.

(1) | The number of common shares issued and outstanding as of January 27, 2012 was 234.260.408. The persons and entities named in the table have sole voting and investment power with respect to all shares shown as beneficially owned by them and have the same voting rights as other shareholders with respect to common shares.

(2) | Does not include common shares subject to options or awards held by such persons at January 27, 2012. See footnotes below for information regarding options now exercisable or that could become exercisable within 60 days of the date of this table.

(3) | Does not include 2.226.064 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 4,590 to US$ 22,430 per share. Options expire in increments during the period between September 2012 and February 2021. Does not include 316.627 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(4) | Does not include 99.363 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 16,340 to US$ 22,430 per share. Options expire in increments during the period between February 2018 and February 2021.

(5) | Does not include 70.342 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 16,34 to US$ 22,430 per share. Options expire in increments during the period between February 2017 and February 2021. Does not include 48.221 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(6) | Does not include 62.202 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 16,340 to US$ 22,430 per share. Options expire in increments during the period between February 2017 and February 2021. Does not include 47.354 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

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(7) | Does not include 53.485 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 6,018 to US$ 22,430 per share. Options expire in increments during the period between April 2013 and February 2021. Includes 1.752.068 shares held by Riesner Verwaltungs GmbH, of which Professor Riesner is the sole stockholder. Does not include 2.146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(8) | Does not include 4.876 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 16,340 to US$ 22,430 per share. Options expire in increments during the period between April 2018 and February 2021. Does not include 2.146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(9) | Does not include 646.818 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 6,018 to US$ 22,430 per share. Options expire in increments during the period between April 2012 and February 2021. Includes 3.738.703 shares held by CC Verwaltungs GmbH, of which Dr. Colpan is the sole stockholder and 800.000 shares held by Colpan GbR. Does not include 2.146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(10) | Does not include 66.818 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 6,018 to US$ 22,430 per share. Options expire in increments during the period between April 2013 and February 2021. Does not include 2.146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(11) | Does not include 60.818 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 6,018 to US$ 22,430 per share. Options expire in increments during the period between April 2014 and February2021. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

(12) | Does not include 4.876 shares issuable upon the exercise of options now exercisable or that could become exercisable within 60 days from the date of this table having exercise prices ranging from US$ 16,340 to US$ 22,430 per share. Options expire in increments during the period between April 2018 and February 2021. Does not include 2,146 shares issuable upon the release of unvested stock awards that could become releasable within 60 days from the date of this table.

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Shareholders

Our shareholders exercise their voting rights through Annual and Extraordinary General Meetings. Resolutions of the General Meeting are adopted by an absolute majority of votes cast, unless a different majority of votes or quorum is required by Dutch law or the Articles of Association. Each common share confers the right to cast one vote.

Furthermore, the Managing Board, or where appropriate, the Supervisory Board, shall provide all shareholders and other parties in the financial markets with equal and simultaneous information about matters that may influence QIAGEN’s share price.

QIAGEN is required to convene an Annual General Meeting in the Netherlands no later than six months following the end of each year. The agenda for the Annual General Meeting must contain certain matters as specified in QIAGEN’s Articles of Association and under Dutch law, including, among other things, the adoption of QIAGEN’s annual financial statements.

Additional Extraordinary General Meetings may be convened at any time by the Managing Board, the Supervisory Board or by one or more shareholders jointly representing at least 40% of QIAGEN’s issued share capital. Furthermore, one or more shareholders, who jointly represent at least 10% of QIAGEN’s issued share capital may, on their application, be authorized by the district court judge having applications for interim relief, to convene a General Meeting. Shareholders are entitled to propose items for the agenda of the General Meeting provided that they hold at least 1% of the issued share capital or the shares they hold represent a market value of at least €50 million. Proposals for agenda items for the General Meeting must be submitted at least 60 days prior to the meeting date. The notice convening a General Meeting, accompanied by the agenda, shall be sent no later than 15 days prior to the meeting. QIAGEN informs the General Meeting by means of explanatory notes to the agenda, providing all facts and circumstances relevant to the proposed resolutions.

The Audit of Financial Reporting

The external auditor is appointed annually by the General Meeting. The Audit Committee recommends to the Supervisory Board the external auditor to be proposed for (re)appointment by the General Meeting. In addition, the Audit Committee evaluates and, where appropriate, recommends the replacement of the external auditor. The external auditor is invited to attend the meeting of the Supervisory Board at which the financial statements shall be approved and is furthermore invited to attend the General Meeting at which the financial statements are adopted and may be questioned by the General Meeting on its statement on the fairness of our annual accounts. At the Annual General Meeting in 2011, Ernst & Young Accountants was appointed as external auditor for the Company for 2011.

Share-Based Compensation

During 2005, the QIAGEN N.V. Amended and Restated 2005 Stock Plan (the Plan) was adopted. The Plan allows for the granting of stock rights and incentive stock options, as well as non-qualified options, stock grants and stock-based awards, generally with terms of up to 10 years, subject to earlier termination in certain situations. Generally, options vest over a three-year period. The vesting and exercisability of certain stock rights will be accelerated in the event of a Change of Control, as defined in the Plan. To date, all option grants have been at the market value on the grant date or at a premium above the closing market price on the grant date. We issue new Common Shares to satisfy option exercises and had approximately 22,1 million Common Shares reserved and available for issuance under this plan at December 31, 2011.

In connection with the 2007 acquisition of Digene Corporation, we assumed three additional equity incentive plans. No new grants will be made under these plans. We had approximately 0,1 million common shares reserved and available for issuance under these plans at December 31, 2011.

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Stock Options

During the years ended December 31, 2011 and 2010, we granted 601.897 and 570.282 stock options, respectively. A summary of the status of employee stock options as of December 31, 2011, and changes during the year then ended is presented below:

All Employee Options |  | Number of Shares (in thousands) |  |  | Weighted Average Exercise Price (US$) |  |  | Weighted Average Contractual Term (US$) |  |  | Aggregate Intrinsic Value (US$ thousands) |
Outstanding at January 1, 2011 |  |  | 7.332 |  |  |  | 13,860 |  |  |  | — |  |  |  | — |
Granted |  |  | 602 |  |  |  | 19,860 |  |  |  | — |  |  |  | — |
Exercised |  |  | (665 | ) |  |  | 12,950 |  |  |  | — |  |  |  | — |
Forfeitured |  |  | (62 | ) |  |  | 19,560 |  |  |  | — |  |  |  | — |
Expired |  |  | (690 | ) |  |  | 21,790 |  |  |  | — |  |  |  | — |
Outstanding at December 31, 2011 |  |  | 6.527 |  |  |  | 13,610 |  |  |  | 3,65 |  |  |  | 15.315 |
Exercisable at December 31, 2011 |  |  | 5.453 |  |  |  | 12,370 |  |  |  | 2,66 |  |  |  | 15.315 |
Vested and expected to vest at December 31, 2011 |  |  | 6.436 |  |  |  | 13,530 |  |  |  | 3,57 |  |  |  | 15.315 |

Restricted Stock Units

Restricted stock units represent rights to receive common shares at a future date. There is no exercise price and the fair market value at the time of grant is recognized ratably over the requisite vesting period, generally 10 years.

A summary of QIAGEN’s restricted stock units as of December 31, 2011, and changes during the year are presented below:

Restricted Stock Units |  | Restricted Stock Units (in thousands) |  |  | Weighted Average Contractual Term (US$) |  |  | Aggregate Intrinsic Value (US$ thousands) |
Outstanding at January 1, 2011 |  |  | 4.417 |  |  |  | — |  |  |  | — |
Granted |  |  | 1.929 |  |  |  | — |  |  |  | — |
Vested |  |  | (451 | ) |  |  | — |  |  |  | — |
Forfeitured and cancelled |  |  | (244 | ) |  |  | — |  |  |  | — |
Outstanding at December 31, 2011 |  |  | 5.651 |  |  |  | 2,91 |  |  |  | 78.030 |
Vested and expected to vest at December 31, 2011 |  |  | 4.597 |  |  |  | 2,78 |  |  |  | 63.488 |

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Risk Management

QIAGEN has identified various risk factors for our business that are reviewed in detail in the 2011 Annual Report. There may be current risks that we have not yet fully assessed or that are currently qualified as minor, but could have a material adverse impact on our performance in the future. The Managing Board has developed and implemented strategies, controls and mitigation measures to identify current and developing risks as part of our risk management system. A variety of functional experts evaluate these business risks, attempting to mitigate and manage these risks.

Risks identified by QIAGEN are subdivided into four major categories with the following key focus areas identified

Functional Group |  | Risk Management Focus
Strategic Risks |  | • Identification and monitoring of competitive threats to the business
|  | • Complexity of product portfolio
|  | • Development and success of key R&D projects
|  | • Dependence on key customers for single product groups
Operational Risk |  | • Monitoring of production risks, including contamination prevention, high-quality product assurance and existence of appropriate redundancy of operations including supplier dependence
|  | • Dependence on individual production sites for certain key products
|  | • Successful integration of acquisitions to achieve anticipated benefits
|  | • Purchasing initiatives, price controls and changes to reimbursements
Compliance/Legal Risks |  | • Monitoring of regulatory risk, including compliance with various regulatory bodies and pending regulatory product approvals
|  | • Monitoring safety in operations and environmental hazard risks
|  | • Ability to defend against intellectual property infringements and maintain competitive advantage after expiration
|  | • Extensive network of subsidiaries and distributors leads to increased risk of FCPA or anti-trust concerns
Financial & Financial Reporting Risks |  | • Tax compliance
| • Fluctuation in currency exchange rates
|  | • Goodwill impairment
|  | • Economic risk (including healthcare funding)
|  | • IT system risks

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The senior executives managing these functional groups report either to the Chief Executive Officer or to a member of the Executive Committee. These executives, in connection with the Chief Financial Officer, make strategic determinations as to the proper risk management procedures to be employed based on their assessment of the risk level.

All identified risks are required to be systematically evaluated based on their likelihood of occurring and their potential impact (estimated in monetary terms). The goal is to determine risks that could significantly threaten our success. The results of the risk assessment and any updates are reported to the Audit Committee on a regular basis. At least once a year, the Supervisory Board discusses the corporate strategy and business risks as well as the results of an assessment by the Managing Board and the Audit Committee on the structure and operations of the internal risk management and control systems, including any significant changes.

In 2008, QIAGEN established a Compliance Committee under the leadership of the Chief Financial Officer in his function as Chief Compliance Officer. The Compliance Committee, which consists of senior executives from Human Resources, Internal Audit, SEC Reporting, Legal and Regulatory, performs a quarterly assessment of the legal and regulatory risks, and initiates any required corrective actions.

With publicly listed shares in the United States, QIAGEN is subject to Sections 302 and 404 of the Sarbanes Oxley Act. QIAGEN enacted internal controls and procedures over its financial reporting in 2011 as described in more detail in the 2011 Annual Report. In a report on its audit of internal controls over financial reporting, the external auditor Ernst & Young expressed the opinion that QIAGEN has maintained in all material respects effective internal control over financial reporting as of December 31, 2011, under the applied criteria issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), an organization formed by various professional accounting and auditing associations in the U.S.

Whistleblower Policy and Code of Conduct

QIAGEN adopted a Whistleblower Policy concerning the reporting of alleged irregularities within QIAGEN of a general, operational or financial nature. Furthermore, a Code of Conduct was adopted that outlines business principles for our employees and rules of conduct. The Code of Conduct can be found on our website at www.qiagen.com.

Anti-Takeover Measures

In 2004 (as amended in 2008), the Supervisory Board granted an option to the Dutch Foundation Stichting Preferente Aandelen QIAGEN that allows the Foundation to acquire preference shares from QIAGEN if (i) a person has (directly or indirectly) acquired or has expressed a desire to acquire more than 20% of our issued share capital, or (ii) a person holding at least a 10% interest in the share capital has been designated as a hostile person by our Supervisory Board. The option enables the Foundation to acquire preference shares equal to the number of our outstanding common shares at the time of the relevant exercise of the right, less one share. When exercising the option and exercising its voting rights on these shares, the Foundation must act in the interest of QIAGEN and the interests of our stakeholders. No preference shares are currently outstanding.

Comply or Explain

The corporate governance structure and compliance with the Code is the joint responsibility of the Managing Board and the Supervisory Board. They are accountable for this responsibility to the General Meeting. QIAGEN continues to seek ways to improve its corporate governance by measuring itself against international best practice. The Code was last amended on December 10, 2008, and can be found at www.commissiecorporategovernance.nl.

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Non-application of a specific best practice provision is not in itself considered objectionable by the Code and may well be justified because of particular circumstances relevant to a company. In accordance with Dutch law, we disclose in our Annual Report the application of the Code’s principles and best practice provisions.

To the extent that we do not apply certain principles and best practice provisions, or do not intend to apply these in the current or the subsequent year, we state the reasons.

QIAGEN takes a positive view of the Code and applies nearly all of the best practice provisions. However, we prefer not to apply some provisions due to the international character of our business as well as the fact – acknowledged by the Commission that drafted the Code – that existing contractual agreements between QIAGEN and individual members of the Managing Board cannot be set aside at will.

The following provides an overview of exceptions that we have identified:

1. | Best practice provision II.1.1 recommends that a management board member is appointed for a maximum period of four years. A member may be reappointed for a term of not more than four years at a time.

Members of the Managing Board are appointed annually for a one-year period beginning on the day following the General Meeting up to and including the day of the General Meeting held in the following year. The employment agreements with the Managing Directors have an indefinite term, but can be terminated with a three-month notice period by the Managing Director and with a six-month notice period by QIAGEN. These agreements were entered into before the Code became applicable; the terms were not renegotiated since this was not considered to be in the interest of QIAGEN. All members of the Managing Board have additional employment agreements with other QIAGEN affiliates that have notice periods deviating from terms in the employment agreements with QIAGEN N.V. (Mr. Uder and Dr. Schorr 24 months, Mr. Schatz and Mr. Sackers 36 months).

2. | Best practice provision II.2.4 recommends that the number of granted options shall be dependent on the achievement of challenging targets specified beforehand.

From time to time, members of our Managing Board are granted options to acquire common shares at an exercise price higher than the market price on the grant date (as determined by reference to an organized trading market or association). Our view is that the “challenging target” has been set at the time of granting the options since the holder cannot realize any value from these options unless the price of our common shares has risen above the exercise price.

3. | Best practice provision II.2.5 recommends that shares granted to management board members without financial consideration shall be retained for a period of at least five years or until at least at the end of the employment, if this period is shorter. The number of shares to be granted shall be dependent on the achievement of clearly quantifiable and challenging targets specified beforehand.

Members of the Managing Board are granted restricted stock units from time to time. Restricted stock units represent rights to receive common shares at a future date. The number of granted restricted stock units is dependent upon the achievement of pre-defined performance goals. Restricted stock units are structured so that 40% of a grant vests after three years, 50% after five years and the remaining 10% after ten years. Further, a portion of the restricted stock unit grants made to Mr. Schorr and Mr. Uder in 2011 are linked to certain pre-defined milestones that must be achieved before receiving the grants (in addition to the vesting periods).

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4. | Pursuant to best practice provision II.2.8 the maximum remuneration in the event of dismissal of a management board member may not exceed one year’s salary (the “fixed” remuneration component). If the maximum of one year’s salary would be manifestly unreasonable for a management board member who is dismissed during his first term of office, such board member shall be eligible for a severance pay not exceeding twice the annual salary.

As explained in item 1 (best practice provision II.1.1), in addition to their employment agreements with QIAGEN N.V., the Managing Board members have entered into employment agreements with certain QIAGEN affiliates that have notice periods of either 24 months or 36 months. In case of termination of an agreement without serious cause as defined by the applicable law, the respective affiliate would remain obliged to compensate the Managing Board member for the remaining term of the employment agreement. QIAGEN believes that these contractual arrangements are well justified due to the long tenures of the Managing Board members.

5. | Best practise provision II.2.11 recommends that the supervisory board may recover from the management board members any variable remuneration awarded on the basis of incorrect financial or other data.

The current employment agreements with the Managing Directors, which were entered into before the recent Code changes took effect, do not include so-called “clawback” provisions. In the event of unjustified variable remuneration awards that were based on incorrect financial or other data, the Supervisory Board would make use of its statutory powers.

6. | Best practise provision III.3.5 recommends that a person may be appointed to the supervisory board for a maximum of three 4-year terms.

The Chairman of the Supervisory Board, Prof. Riesner, has been a member of the Supervisory Board of QIAGEN N.V. since its establishment in 1996. Further, Mr. Hornnaess has served on the Supervisory Board since 1998. Prof. Riesner contributes his profound scientific expertise and excellent connections in the scientific community to the board profile, while Mr. Hornnaess contributes significant value due to his long-term experience in various management positions in the life science industry. Both board members have unique knowledge about QIAGEN that is considered to be highly valuable. As a result, QIAGEN strongly supports the reappointment of both members beyond the 12-year term as recommended by the Code.

7. | Best practice provision III.7.1 recommends that a supervisory board member may not be granted any shares and/or rights to shares by way of remuneration.

QIAGEN has granted stock options to the members of the Supervisory Board as a remuneration component since its establishment. Since 2007, Supervisory Board members have also been granted restricted stock units. This practice is in compliance with international business practice in our industry, and we consider the granting of stock options or stock rights as an important incentive to attract individuals with the required skills and expertise to serve on our Supervisory Board.

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8. | Best practice provision IV.1.1 recommends that a general meeting of shareholders is empowered to cancel binding nominations of candidates for the management board and supervisory board, and to dismiss members of either board by a simple majority of votes of those in attendance, a-though the company may require a quorum of at least one third of the voting rights outstanding for such vote to have force. If such quorum is not represented, but a majority of those in attendance votes in favour of the proposal, a second meeting may be convened and its vote will be binding, even without a one-third quorum.

Our Articles of Association currently state that the General Meeting may at all times overrule a binding nomination by a resolution adopted by at least a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital. Although a deviation from provision IV.1.1 of the Code, the Supervisory Board and the Managing Board hold the view that these provisions will enhance the continuity of QIAGEN’s management and policies.

Declaration of Compliance of QIAGEN N.V. regarding the German Corporate Governance Code

In QIAGEN’s 2001 Annual Report, the Managing Board and the Supervisory Board of QIAGEN N.V. declared their intention to disclose compliance with the German Corporate Governance Code pursuant to §161 of the German Stock Corporation Law (AktG) or state the deviations for a particular period. QIAGEN N.V. is a company organized under the laws of The Netherlands and subject to the laws, rules and regulations of this country. In addition, our shares are listed on the NASDAQ Stock Exchange. As a result, the compliance of QIAGEN with the German Corporate Governance Code is dependent on the code’s compatibility with the laws, rules, regulations and customs that QIAGEN is subject to in The Netherlands and the U.S. QIAGEN declares compliance with the German Corporate Governance Code with the following exceptions:

1. | Item 3.8 paragraph 2

If the company takes out a D&O (directors’ and officers’ liability insurance) policy for the Management Board, a deductible of at least 10% of the loss up to at least the amount of one and a half times the fixed annual compensation of the Management Board member must be agreed upon.

A similar deductible must be agreed upon in any D&O policy for the Supervisory Board.

QIAGEN’s D&O insurance policy provides for a fixed deductible of US$ 10.000 for members of the Managing Board and the Supervisory Board, which we consider an appropriate sign by our members of taking responsibility for their actions.

2. | Item 4.2.3 paragraph 3

For instance, share or index-based compensation elements related to the enterprise may come into consideration as variable components. These elements shall be related to demanding, relevant comparison parameters. Changing such performance targets or the comparison parameters retroactively shall be excluded. For extraordinary developments a possibility of limitation (cap) must in general be agreed upon by the Supervisory Board.

From time to time, the members of our Managing Board are granted restricted stock units and options to acquire common shares at an exercise price set 2% higher than the market price on the grant date (as determined by reference to an organized trading market or association). These option rights and restricted stock units are subject to multi-year vesting periods and sales restrictions. Members of the Managing Board cannot realize any profit from these grants unless they succeed in increasing shareholder value on a long-term

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period. For these reasons, as well as to ensure comparability to equity-based incentives granted by peer companies in our industry, we consider these terms to be the most appropriate comparison parameters for the restricted stock units and stock options granted to Managing Board members.

3. | Item 4.2.3 paragraph 4 and 5

In concluding Management Board contracts, care shall be taken to ensure that payments made to a Management Board member on premature termination of his contract without serious cause do not exceed the value of two years’ compensation (severance payment cap) and compensate no more than the remaining term of the contract. The severance payment cap shall be calculated on the basis of the total compensation for the past full financial year and if appropriate also the expected total compensation for the current financial year.

Payments promised in the event of premature termination of a Management Board member’s con-tract due to a change of control shall not exceed 150% of the severance payment cap.

The employment agreements with Managing Directors have an indefinite term, but can be terminated with a three-month notice period by the Managing Director and with a six-month notice period by QIAGEN. All members of the Managing Board have additional employment agreements with other QIAGEN affiliates that have longer notice periods (Mr. Uder and Dr. Schorr 24 months, Mr. Schatz and Mr. Sackers 36 months). In case of a termination without serious cause as defined by the applicable law, QIAGEN would remain obliged to compensate the Managing Board Member for the remaining term of the agreement.

No arrangements exist for early retirement of Managing Board members. In the event of the sale or transfer of all or substantially all of QIAGEN’s assets or business to an acquirer in one or several transactions including a merger, consolidation or a transfer of shares to a third party, the members are entitled to a Change of Control bonus payment commensurate to a multiple (Mr. Schatz 5 times, Mr. Sackers 3 times, Mr. Uder and Dr. Schorr 2 times) of their annual salary (fixed payment and annual bonus). QIAGEN believes that these severance and Change of Control agreements are appropriate due to the long tenures of the Managing Board members.

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Corporate Governance Statement

This is a statement concerning corporate governance as referred to in article 2a of the decree on additional requirements for annual reports (Vaststellingsbesluit nadere voorschriften inhoud jaarverslag) effective as of January 1, 2010 (the “Decree”). The information required to be included in this corporate governance statement as described in articles 3, 3a and 3b of the Decree can be found in the following sections of this Annual Report:

| • |  | The information concerning compliance with the Dutch Corporate Governance Code (published at www.commissiecorporategovernance.nl), as required by article 3 of the Decree, can be found in the relevant sections under “Corporate Governance Report” in this Annual Report;

| • |  | The information concerning QIAGEN’s risk management and control frameworks relating to the financial reporting process, as required by article 3a sub a of the Decree, can be found in the relevant sections under “Corporate Governance Report” in this Annual Report;

| • |  | The information regarding the functioning of QIAGEN’s General Meeting of Shareholders, and the authority and rights of QIAGEN’s shareholders, as required by article 3a sub b of the Decree, can be found in the relevant sections under “Corporate Governance Report” in this Annual Report;

| • |  | The information regarding the composition and functioning of QIAGEN’s Managing Board, the Supervisory Board and its committees, as required by article 3a sub c of the Decree, can be found in the relevant sections under “Corporate Governance Report” and the Report of the Supervisory Board in this Annual Report;

| • |  | The information concerning the inclusion of the information required by the Decree Article 10 EU Takeover Directive, as required by article 3b of the Decree, can be found in the relevant sections under “Corporate Governance Report” in this Annual Report;

Requirements – Germany

QIAGEN is required, as a company of which the shares are listed on the Frankfurt Stock Exchange, to state how it has applied the main principles and how far it has complied with the provisions of the German Corporate Governance Code.

Requirements – the United States

QIAGEN’s shares are listed on the NASDAQ Global Select Market and must therefore comply with such of the requirements of US legislation, such as the Sarbanes-Oxley Act of 2002, regulations enacted under US securities laws and the listing standards of NASDAQ as are applicable to foreign private issuers.

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Responsibility Statement of the Management Board

In accordance with best practice II.1.5 of the Dutch corporate governance code of December 2008, taking into account the recommendation of the Corporate Governance Code Monitoring Committee on the application thereof, the Managing Board confirms that internal controls over financial reporting provide a reasonable level of assurance that the financial reporting does not contain any material inaccuracies, and confirms that these controls functioned properly in the year under review and that there are no indications that they will not continue to do so. The financial statements fairly represent the Company’s financial condition and the results of the Company’s operations and provide the required disclosures.

It should be noted that the above does not imply that these systems and procedures provide absolute assurance as to the realization of operational and strategic business objectives, or that they can prevent all misstatements, inaccuracies, errors, fraud and non-compliances with legislation, rules and regulations.

In accordance with Article 5.25c of the Financial Markets Supervisory Act, and in view of all of the above the management board confirms that, to its knowledge, the financial statements give a true and fair view of the assets, liabilities, financial position and profit or loss of the Company and the annual report includes a fair review of the position at the balance sheet date and the development and performance of the business during the financial year together with a description of the principal risks and uncertainties that the Company faces.

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FINANCIAL STATEMENTS

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Consolidated statement of financial position

for the year ended December 31, 2011

(in US$ thousands) |  | Note |  |  | December 31, 2011 |  |  | December 31, 2010 |
ASSETS |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | (16 | ) |  |  | 221.598 |  |  |  | 830.354 |
Current available-for-sale financial instruments |  |  | (17 | ) |  |  | 54.577 |  |  |  | 106.077 |
Trade accounts receivable |  |  | (18 | ) |  |  | 230.770 |  |  |  | 197.418 |
Inventories |  |  | (19 | ) |  |  | 132.236 |  |  |  | 126.633 |
Income tax receivable |  |  |  |  |  |  | 19.009 |  |  |  | 10.920 |
Prepaid expenses and other current assets |  |  | (20 | ) |  |  | 42.726 |  |  |  | 52.936 |
Total current assets |  |  |  |  |  |  | 700.916 |  |  |  | 1.324.338 |
Property, plant and equipment |  |  | (21 | ) |  |  | 345.170 |  |  |  | 323.941 |
Goodwill |  |  | (22 | ) |  |  | 1.746.773 |  |  |  | 1.365.156 |
Other intangible assets |  |  | (23 | ) |  |  | 891.887 |  |  |  | 873.903 |
Investments in associates |  |  | (24 | ) |  |  | 35.647 |  |  |  | 19.640 |
Non-current available-for-sale financial instruments |  |  | (17 | ) |  |  | 6.802 |  |  |  | 3.359 |
Deferred tax assets |  |  | (15 | ) |  |  | 94.127 |  |  |  | 99.098 |
Other non-current assets |  |  |  |  |  |  | 12.832 |  |  |  | 34.463 |
Total non-current assets |  |  |  |  |  |  | 3.133.238 |  |  |  | 2.719.560 |
Total assets |  |  |  |  |  |  | 3.834.154 |  |  |  | 4.043.898 |

Consolidated Financial Statements | ASSETS | F - 1

##### Table of Contents

QIAGEN N.V.

Consolidated statement of financial position

for the year ended December 31, 2011

(in US$ thousands, except share data) |  | Note |  |  | December 31, 2011 |  |  | December 31, 2010 |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |  |  |  |  |
Current financial debts |  |  | (25 | ) |  |  | 145.963 |  |  |  | 77.851 |
Trade and other accounts payable |  |  |  |  |  |  | 59.848 |  |  |  | 47.803 |
Provisions |  |  | (26 | ) |  |  | 5.063 |  |  |  | 6.405 |
Income tax payable |  |  |  |  |  |  | 31.364 |  |  |  | 25.211 |
Other current liabilities |  |  | (27 | ) |  |  | 205.482 |  |  |  | 196.532 |
Total current liabilities |  |  |  |  |  |  | 447.720 |  |  |  | 353.802 |
Non-current financial debts |  |  | (25 | ) |  |  | 430.562 |  |  |  | 767.333 |
Deferred tax liabilities |  |  | (15 | ) |  |  | 259.286 |  |  |  | 273.558 |
Other non-current liabilities |  |  | (28 | ) |  |  | 63.775 |  |  |  | 51.108 |
Total non-current liabilities |  |  |  |  |  |  | 753.623 |  |  |  | 1.091.999 |
Common shares |  |  |  |  |  |  | 2.739 |  |  |  | 2.724 |
Share premium |  |  |  |  |  |  | 1.842.648 |  |  |  | 1.811.633 |
Reserves |  |  |  |  |  |  | 20.466 |  |  |  | 69.417 |
Retained earnings |  |  | (30 | ) |  |  | 757.464 |  |  |  | 714.323 |
Equity attributable to equity holders of the parent |  |  |  |  |  |  | 2.623.317 |  |  |  | 2.598.097 |
Non-controlling interests |  |  | (10 | ) |  |  | 9.494 |  |  |  | 0 |
Total equity |  |  |  |  |  |  | 2.632.811 |  |  |  | 2.598.097 |
Total liabilities and equity |  |  |  |  |  |  | 3.834.154 |  |  |  | 4.043.898 |
Issued and outstanding shares (in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Authorized common shares: 410.000, EUR 0,01 par value |  |  |  |  |  |  | 234.221 |  |  |  | 233.115 |
Preference shares: 450.000, EUR 0,01 par value |  |  |  |  |  |  | 0 |  |  |  | 0 |
Financing shares: 40.000, EUR 0,01 par value |  |  |  |  |  |  | 0 |  |  |  | 0 |

Consolidated Financial Statements | LIABILITIES AND EQUITY | F - 2

##### Table of Contents

QIAGEN N.V.

Consolidated income statement

for the year ended December 31, 2011

(in US$ thousands, except share data) |  | Note |  |  | 2011 |  |  | 2010 |
Net sales |  |  |  |  |  |  | 1.169.747 |  |  |  | 1.087.431 |
Cost of sales |  |  |  |  |  |  | (341.567 | ) |  |  | (308.770 | )
Cost of sales acquisition related |  |  |  |  |  |  | (9.648 | ) |  |  | (1.322 | )
Purchased intangibles amortization |  |  |  |  |  |  | (70.176 | ) |  |  | (61.777 | )
Gross profit |  |  |  |  |  |  | 748.356 |  |  |  | 715.562 |
Other operating income |  |  |  |  |  |  | 6.005 |  |  |  | 6.385 |
Research and development expense |  |  |  |  |  |  | (175.848 | ) |  |  | (114.778 | )
Sales and marketing expense |  |  |  |  |  |  | (311.303 | ) |  |  | (267.484 | )
General and administrative, integration and other expense |  |  | (12 | ) |  |  | (195.644 | ) |  |  | (111.582 | )
Purchased intangibles amortization |  |  |  |  |  |  | (37.377 | ) |  |  | (26.588 | )
Other operating expense |  |  |  |  |  |  | (3.869 | ) |  |  | (5.017 | )
Income from operations |  |  |  |  |  |  | 30.320 |  |  |  | 196.498 |
Financial income |  |  |  |  |  |  | 7.390 |  |  |  | 4.472 |
Financial expense |  |  |  |  |  |  | (38.049 | ) |  |  | (40.560 | )
Foreign currency gains, net |  |  |  |  |  |  | 12.392 |  |  |  | 2.641 |
Gain from investments in associates |  |  | (24 | ) |  |  | 196 |  |  |  | 2.907 |
Other financial income |  |  | (14 | ) |  |  | 604 |  |  |  | 604 |
Income before tax |  |  |  |  |  |  | 12.853 |  |  |  | 166.562 |
Income taxes |  |  | (15 | ) |  |  | 29.199 |  |  |  | (24.565 | )
Net income for the period |  |  |  |  |  |  | 42.052 |  |  |  | 141.997 |
- attributable to equity holders of the parent |  |  |  |  |  |  | 43.141 |  |  |  | 141.997 |
- attributable to non-controlling interests |  |  |  |  |  |  | (1.089 | ) |  |  | 0 |
Earnings per share attributable to equity holders of the parent - basic and diluted* |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares (basic) |  |  |  |  |  |  | 233.850 |  |  |  | 232.635 |
Basic in US$ per share |  |  | (8 | ) |  | $ | 0,18 |  |  | $ | 0,61 |
Weighted average number of common shares (diluted) |  |  |  |  |  |  | 236.726 |  |  |  | 235.478 |
Diluted in US$ per share |  |  | (8 | ) |  | $ | 0,18 |  |  | $ | 0,60 |

* | Please refer to Note 9 for details on the adjusted earnings per share.

Consolidated Financial Statements | INCOME | F - 3

##### Table of Contents

QIAGEN N.V.

Consolidated statement of comprehensive Income

for the year ended December 31, 2011

(in US$ thousands) |  | Note |  |  | 2011 |  |  | 2010 |
Net income for the period |  |  |  |  |  |  | 42.052 |  |  |  | 141.997 |
Cash flow hedge reserve: |  |  |  |  |  |  |  |  |  |  |  |
Gains /(losses) on hedging contracts |  |  |  |  |  |  | 5.417 |  |  |  | 14.636 |
Reclassification adjustments for gains/(losses) included in the income statement |  |  |  |  |  |  | (3.961 | ) |  |  | (8.874 | )
Net gain/ (loss) on cash flow hedging contracts |  |  |  |  |  |  | 1.456 |  |  |  | 5.762 |
Income Tax |  |  | (15 | ) |  |  | (574 | ) |  |  | (2.079 | )
Cash flow hedge reserve, net of tax |  |  |  |  |  |  | 882 |  |  |  | 3.683 |
Foreign currency translation reserve: |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation differences |  |  |  |  |  |  | (49.287 | ) |  |  | 5.966 |
Income Tax |  |  | (15 | ) |  |  | (546 | ) |  |  | 134 |
Foreign currency translation reserve, net of tax: |  |  |  |  |  |  | (49.833 | ) |  |  | 6.100 |
Comprehensive income for the period, net of tax |  |  |  |  |  |  | (48.951 | ) |  |  | 9.783 |
Total Comprehensive income |  |  |  |  |  |  | (6.899 | ) |  |  | 151.780 |
- attributable to equity holders of the parent |  |  |  |  |  |  | (3.739 | ) |  |  | 151.780 |
- attributable to non-controlling interest interests |  |  |  |  |  |  | (3.160 | ) |  |  | 0 |

Consolidated Financial Statements | OTHER COMPREHENSIVE INCOME | F - 4

##### Table of Contents

QIAGEN N.V.

Consolidated statement of cash flows

for the year ended December 31, 2011

(in US$ thousands) |  | Note |  |  | 2011 |  |  | 2010 |
Net income for the period |  |  |  |  |  |  | 42.052 |  |  |  | 141.997 |
Adjustments to reconcile to net cash flows: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, amortization and impairment of intangible and other fixed assets |  |  |  |  |  |  | 236.916 |  |  |  | 154.149 |
Non cash acquisition related costs |  |  |  |  |  |  | 43.029 |  |  |  | 0 |
Non cash impacts from convertible bond |  |  |  |  |  |  | 13.179 |  |  |  | 15.135 |
Gain on sale of PP&E |  |  |  |  |  |  | 293 |  |  |  | 0 |
Gain on sale of investments |  |  |  |  |  |  | (604 | ) |  |  | 0 |
Deferred income taxes |  |  |  |  |  |  | (61.416 | ) |  |  | (25.021 | )
Share based compensation |  |  |  |  |  |  | 37.941 |  |  |  | 13.592 |
Other non cash items |  |  |  |  |  |  | 2.491 |  |  |  | (11.325 | )
(Increase) / decrease in accounts receivable |  |  |  |  |  |  | (29.356 | ) |  |  | (6.884 | )
(Increase) / decrease in inventories |  |  |  |  |  |  | (15.945 | ) |  |  | 2.348 |
(Increase) / decrease in income tax receivables |  |  |  |  |  |  | (7.154 | ) |  |  | 2.052 |
(Increase) / decrease in other assets |  |  |  |  |  |  | 9.720 |  |  |  | 1.889 |
Increase / (decrease) in accounts payable |  |  |  |  |  |  | 7.261 |  |  |  | 3.482 |
Increase / (decrease) in accrued and other liabilities |  |  |  |  |  |  | (9.703 | ) |  |  | (32.041 | )
Increase / (decrease) in income tax payables |  |  |  |  |  |  | (1.963 | ) |  |  | 12.401 |
Net cash provided by operating activities |  |  |  |  |  |  | 266.741 |  |  |  | 271.774 |
Purchases of property, plant and equipment |  |  |  |  |  |  | (86.805 | ) |  |  | (79.666 | )
Purchases of intangible assets |  |  |  |  |  |  | (34.583 | ) |  |  | (44.243 | )
Capitalization of development expenses |  |  |  |  |  |  | (16.529 | ) |  |  | (17.892 | )
Proceeds from sale of equipment |  |  |  |  |  |  | 2.020 |  |  |  | 3.474 |
Sale / (purchase) of available-for-sale assets |  |  |  |  |  |  | 55.813 |  |  |  | (66.077 | )
Sale / (purchase) of investments |  |  |  |  |  |  | (19.284 | ) |  |  | 7.985 |
Cash paid for acquisitions, net of cash acquired |  |  |  |  |  |  | (457.483 | ) |  |  | (36.985 | )
Net cash used in investing activities |  |  |  |  |  |  | (556.851 | ) |  |  | (233.404 | )
Proceeds from debt |  |  |  |  |  |  | 186.329 |  |  |  | 3.016 |
Repayments of debt |  |  |  |  |  |  | (469.857 | ) |  |  | (50.000 | )
Principal payments on finance leases |  |  |  |  |  |  | (3.704 | ) |  |  | (3.262 | )
Issuance of common shares |  |  |  |  |  |  | 8.779 |  |  |  | 11.241 |
Other financing activities |  |  |  |  |  |  | (37.341 | ) |  |  | 814 |
Net cash provided by financing activities |  |  |  |  |  |  | (315.794 | ) |  |  | (38.191 | )
Effect of exchange rate changes on cash and cash equivalents |  |  |  |  |  |  | (2.852 | ) |  |  | 2.837 |
Net increase / (decrease) in cash and cash equivalents |  |  |  |  |  |  | (608.756 | ) |  |  | 3.016 |
Cash and cash equivalents at January 1st |  |  |  |  |  |  | 830.354 |  |  |  | 827.338 |
Cash and cash Equivalents at December 31st |  |  | (16 | ) |  |  | 221.598 |  |  |  | 830.354 |
Supplemental cash flow disclosures: |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for interest |  |  |  |  |  |  | (20.432 | ) |  |  | (25.046 | )
Cash received for interest |  |  |  |  |  |  | 6.128 |  |  |  | 4.310 |
Cash paid for income taxes |  |  |  |  |  |  | (41.494 | ) |  |  | (33.781 | )
Non-cash investing and financing transactions: |  |  |  |  |  |  |  |  |  |  |  |
Equipment purchased through finance lease |  |  |  |  |  |  | 545 |  |  |  | 1.185 |

Consolidated Financial Statements | CASH FLOWS | F - 5

##### Table of Contents

QIAGEN N.V.

Consolidated statement of changes in equity

for the year ended December 31, 2010

(in U$ thousands) |  |  |  |  | Common shares |  |  | Share premium |  |  | Retained earnings |  |  | Cash flow hedge reserve |  |  | Foreign currency translation |  |  | Reserves |  |  | Attributable to equity holders of the parent |  |  | Non- controlling interests |  |  | Total equity |
At January 1, 2010 |  |  |  |  |  |  | 2.711 |  |  |  | 1.785.345 |  |  |  | 572.326 |  |  |  | (5.327 | ) |  |  | 64.961 |  |  |  | 59.634 |  |  |  | 2.420.016 |  |  |  | 0 |  |  |  | 2.420.016 |
Net income for the period |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 141.997 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 141.997 |  |  |  | 0 |  |  |  | 141.997 |
Other comprehensive income |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 3.683 |  |  |  | 6.100 |  |  |  | 9.783 |  |  |  | 9.783 |  |  |  | 0 |  |  |  | 9.783 |
Total comprehensive Income |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 141.997 |  |  |  | 3.683 |  |  |  | 6.100 |  |  |  | 9.783 |  |  |  | 151.780 |  |  |  | 0 |  |  |  | 151.780 |
Tax benefit of employee stock plans |  |  |  |  |  |  | 0 |  |  |  | 445 |  |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 445 |  |  |  | 0 |  |  |  | 445 |
Share-based payments |  |  |  |  |  |  | 0 |  |  |  | 14.615 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 14.615 |  |  |  | 0 |  |  |  | 14.615 |
Employee stock plans |  |  |  |  |  |  | 13 |  |  |  | 11.228 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 11.241 |  |  |  | 0 |  |  |  | 11.241 |
At December 31, 2010 |  |  |  |  |  |  | 2.724 |  |  |  | 1.811.633 |  |  |  | 714.323 |  |  |  | (1.644 | ) |  |  | 71.061 |  |  |  | 69.417 |  |  |  | 2.598.097 |  |  |  | 0 |  |  |  | 2.598.097 |
for the year ended December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(in U$ thousands) |  | Note |  |  | Common shares |  |  | Share premium |  |  | Retained earnings |  |  | Cash flow hedge reserve |  |  | Foreign currency translation |  |  | Reserves |  |  | Attributable to equity holders of the parent |  |  | Non- controlling interests (10) |  |  | Total equity |
At January 1, 2011 |  |  |  |  |  |  | 2.724 |  |  |  | 1.811.633 |  |  |  | 714.323 |  |  |  | (1.644 | ) |  |  | 71.061 |  |  |  | 69.417 |  |  |  | 2.598.097 |  |  |  | 0 |  |  |  | 2.598.097 |
Net income for the period |  |  | (30 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 43.141 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 43.141 |  |  |  | (1.089 | ) |  |  | 42.052 |
Other comprehensive income (loss) |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 882 |  |  |  | (49.833 | ) |  |  | (48.951 | ) |  |  | (48.951 | ) |  |  | (2.071 | ) |  |  | (51.022 | )
Total comprehensive Income |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 43.141 |  |  |  | 882 |  |  |  | (49.833 | ) |  |  | (48.951 | ) |  |  | (5.810 | ) |  |  | (3.160 | ) |  |  | (8.970 | )
Tax benefit of employee stock plans |  |  |  |  |  |  | 0 |  |  |  | (4.565 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (4.565 | ) |  |  | 0 |  |  |  | (4.565 | )
Share-based payments |  |  |  |  |  |  | 0 |  |  |  | 26.817 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 26.817 |  |  |  | 0 |  |  |  | 26.817 |
Employee stock plans |  |  | (31 | ) |  |  | 15 |  |  |  | 8.763 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 8.778 |  |  |  | 0 |  |  |  | 8.778 |
Acquisition of subsidiary |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 12.654 |  |  |  | 12.654 |
At December 31, 2011 |  |  |  |  |  |  | 2.739 |  |  |  | 1.842.648 |  |  |  | 757.464 |  |  |  | (762 | ) |  |  | 21.228 |  |  |  | 20.466 |  |  |  | 2.623.317 |  |  |  | 9.494 |  |  |  | 2.632.811 |

Consolidated Financial Statements | EQUITY CHANGES | F - 6

##### Table of Contents

QIAGEN N.V.

QIAGEN N.V.

NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2011

1. | Corporate Information

QIAGEN N.V. is a public limited liability company (‘naamloze vennootschap’) under Dutch law with registered office at Spoorstraat 50, Venlo, The Netherlands. QIAGEN N.V. as the holding company and Subsidiaries (‘the Company’, ‘Group’, ‘we’ or ‘QIAGEN’) is a leading provider of innovative sample and assay technologies. These technologies – consumable products such as sample and assay kits and automated instrumentation systems – empower customers to transform raw biological samples into valuable molecular information. We serve four major customer classes: molecular diagnostics laboratories, academic researchers, pharmaceutical research and development groups, and applied testing customers in fields such as forensics, veterinary diagnostics, food safety and biosecurity. We market our products in more than 100 countries.

The consolidated financial statements of QIAGEN for the year ended December 31, 2011, were authorized for issue in accordance with a resolution of the Board of Directors on April 19, 2012.

2. | Basis of Preparation

The consolidated financial statements have been prepared on a historical cost basis, except for derivative financial instruments and available-for-sale financial instruments that have been measured at fair value. The consolidated financial statements are presented in U.S. Dollar (US$) and all values are rounded to the nearest thousand ($000) except when otherwise indicated.

3. | Statement of Compliance

The consolidated financial statements of QIAGEN have been prepared in accordance with international Financial Reporting standards (IFRS) as endorsed by the European Union (EU).

4. | Consolidation Principles

The consolidated financial statements comprise the financial statements of the Group and its subsidiaries as at December 31, 2011.

Subsidiaries are fully consolidated from the date of acquisition, being the date on which the Group obtains control, and continue to be consolidated until the date that such control ceases. The financial statements of the subsidiaries are prepared for the same reporting period as the parent company, using consistent accounting policies. All intra-group balances, income and expenses, unrealized gains and losses and dividends resulting from intra-group transactions are eliminated in full.

Profit or loss and each component of other comprehensive income are attributed to the owners of the parent and to the non-controlling interest. Total comprehensive income is attributed to the owners of the parent and to the non-controlling interest even this results in a deficit balance.

Consolidated Financial Statements | NOTES | F - 7

##### Table of Contents

QIAGEN N.V.

A change in the ownership interest of a subsidiary, without a change of control, is accounted for as an equity transaction.

If the Group loses control over a subsidiary, it derecognizes the assets (including goodwill) and liabilities of the subsidiary, the carrying amount of any non-controlling interest, the cumulative translation differences, recorded in equity, recognizes the fair value of the consideration received, recognizes the fair value of any investment retained, any surplus or deficit in profit or loss and reclassifies the parent’s share of components previously recognized in other comprehensive income to profit or loss.

5. | Changes in Accounting Policy and Disclosures

5.1. | The Group has adopted the following new and amended IFRSs and IFRIC interpretations as of January 1, 2011:

| • |  | IAS 32 (amended) ‘Presentation – Classification of rights issues’. The amendment addresses the accounting for rights issues (rights, options or warrants) that are denominated in a currency other than the functional currency of the issuer. The amendment did not have any impact on the financial position or performance of the Group.

| • |  | IAS 24 (revised) ‘Related party disclosures’. The standard is revised by simplifying the definition of a related party, clarifying its intended meaning and eliminating inconsistencies from the definition. Furthermore a partial exemption from disclosure requirements for government-related entities is provided. The adoption of the new IAS 24 did not have any impact on the financial position or performance of the Group.

| • |  | Improvements to IFRSs and IFRIC interpretations as issued in 2010. In this edition of the annual improvements, the IASB issued eleven amendments to six standards and one interpretation. The resulting amendments were implemented on their respective effective dates and did not have any impact on the financial position of performance of the Group.

The following Interpretations and amendments to interpretations did not have any impact on the accounting policies, financial position or performance of QIAGEN:

| • |  | IFRIC 14 (amended) ‘IAS 19 – The limit on a defined benefit asset, minimum funding requirements and their interaction’.

| • |  | IFRIC 19 ‘Extinguishing financial liabilities with equity instruments’.

5.2. | New and amended IFRSs and IFRIC interpretations not effective for the financial year beginning January 1, 2011 :

The Group has not early adopted the following new and amended standards. QIAGEN does not expect any significant impact on the financial position or performance resulting from the new and amended standards listed below. QIAGEN intends to adopt the new and amended standards at their respective effective dates.

| • |  | IAS 1, ‘Financial statements presentation – presentation of items of other comprehensive income’ changes the grouping of items presented in other comprehensive income and affects its presentation. Items that could be reclassified to profit or loss at a future point would be presented separately from items that will never be reclassified. The amendment becomes effective for annual periods beginning on or after July 1, 2012.

| • |  | IAS 12, ‘Income taxes – Recovery of underlying assets’ clarifies the determination of deferred taxes on investment property measured at fair value and is effective for periods beginning on or after January 1, 2012.

Consolidated Financial Statements | NOTES | F - 8

##### Table of Contents

QIAGEN N.V.

| • |  | IAS 19, ‘Employee benefits’ eliminates the corridor approach and calculates finance costs on a net funding basis. The amendment is mandatory for periods beginning on or after January 1, 2013.

| • |  | IFRS 7, ‘Financial instruments: Disclosures: Transfer of financial assets’ the amendment promotes transparency in the reporting of transfer transactions and improves users’ understanding of the risk exposures relating to transfers of financial assets and the effect of those risks on an entity’s financial position, particularly those involving securitization of financial assets. The amendment becomes effective for periods beginning on or after July 1, 2011.

| • |  | IFRS 7, ‘Financial instruments: Offsetting financial assets and financial liabilities’ these amendments would provide users with information that is useful in (a) evaluating the effect or potential effect of netting arrangements on an entity’s financial position and (b) analyzing and comparing financial statements prepared in accordance with IFRSs and US GAAP. The amendments to IFRS 7 are to be applied retrospectively for annual periods beginning on or after January 1, 2013.

| • |  | IAS 32, ‘Financial instruments: Presentation: Offsetting financial assets and financial liabilities’, effective January 1, 2014. These amendments clarify the meaning of “currently has a legally enforceable right to set-off” and also clarify the application of the IAS 32 offsetting criteria to settlement systems (such as central clearing house systems) which apply gross settlement mechanisms that are not simultaneous.

| • |  | IFRS 9, ‘Financial instruments – Classification and measurement’ addresses the classification, measurement and recognition of financial assets and financial liabilities. IFRS 9 requires financial assets to be classified into two measurement categories: those measured as at fair value and those measured at amortised cost. The determination is made at initial recognition. The classification depends on the entity’s business model for managing its financial instruments and the contractual cash flow characteristics of the instrument. For financial liabilities, the standard retains most of the IAS 39 requirements. The main change is that, in cases where the fair value option is taken for financial liabilities, the part of a fair value change due to an entity’s own credit risk is recorded in other comprehensive income rather than the income statement, unless this creates an accounting mismatch. The amendment becomes effective January 1, 2015,

| • |  | IFRS 10, ‘Consolidated financial statements’ is mandatory for periods beginning on or after January 1, 2013. The standard provides additional guidance to assist in the determination of control where this is difficult to assess and defines the principle of control, and establishes control as the basis for consolidation.

| • |  | IFRS 11, ‘Joint arrangements’, effective for periods beginning on or after January 1, 2013, defines two types of joint arrangement: joint operations and joint ventures. Joint operations arise where a joint operator has rights to the assets and obligations relating to the arrangement and hence accounts for its interest in assets, liabilities, revenue and expenses. Joint ventures arise where the joint operator has rights to the net assets of the arrangement and hence equity accounts for its interest. Proportional consolidation of joint ventures is no longer allowed.

| • |  | IFRS 12, ‘Disclosures of interests in other entities’ includes the disclosure requirements for all forms of interests in other entities, including joint arrangements, associates, special purpose vehicles and other off-balance sheet vehicles. The new standard becomes effective for periods beginning on or after January 1, 2013.

| • |  | IFRS 13, ‘Fair value measurement’, aims to improve consistency and to reduce complexity by providing a precise definition of fair value and a single source of fair value measurement and disclosure requirements for use across IFRSs. The new standard becomes effective for periods beginning on or after January 1, 2013.

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There are no other IFRSs or IFRIC interpretations that are not yet effective that would be expected to have a significant effect on the accounting policies, financial position or performance of the Group.

5.3. | Changes in Presentation and Corrections of Errors

The supplementary cash flow disclosure for cash paid for interest has been changed for the year ended December 31, 2010, due to the correction of an error. The correct amount of cash paid for interest for the year ended December 31, 2010, is US$ 25,0 million instead US$ 5,0 million which has been reported in the prior year financial statements. The correction of this disclosure does not impact the presentation of the consolidated statement of cash flows. The cash flows from operating, investing and financing activities were correctly stated in the prior year financial statements and remain unchanged.

6. | Significant Accounting Estimates and Judgments

The preparation of the consolidated financial statements in conformity with IFRS requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates and assumptions that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year are described below.

Impairment of Assets

Assets are tested or reviewed for impairment in accordance with the accounting policy stated under Note 7.21. Considerable management judgment is necessary to identify impairment indicators and to estimate future sales and expenses, which underlie the discounted future cash flow projection. Factors such as changes in the planned use of buildings, machinery and equipment, closing of facilities, lower than anticipated sales for products with capitalized rights, changes in the legal framework covering patents, technology rights or licenses could result in shortened useful lives or impairment losses to be recognized in the period in which such determination is made.

Development Costs

Development costs are capitalized in accordance with the accounting policy stated under Note 7.5. Determining the amounts to be capitalized requires management to make assumptions regarding the expected future cash generation of the assets, discount rates to be applied and the expected period of benefits. During 2011 the management reviewed the carrying amount of projects and assessed whether they were impaired or not. As per end of December 31, 2011, we considered an impairment loss of US$ 56,1 million (2010: US$ 1,5 million), included in amortization of capitalized development costs under R&D expenses.

Income Taxes

The Group is subject to income taxes in numerous jurisdictions. Significant judgment is required in determining provisions for income taxes. Some of these estimates are based on interpretations of existing laws or regulations. Various internal and external factors, such as changes in tax laws, regulations and rates, changing interpretations of existing tax laws or regulations, future level of research and development spending and changes in overall levels of pre-tax income may have favorable or unfavorable effects on the income tax and deferred tax provisions in the period in which such determination is made.

Deferred tax assets are recognized in accordance with the accounting policy stated in Note 7.10. Deferred tax assets are recognized for net operating loss carry-forwards to the extent that it is probable that taxable profit will be available against which the losses can be utilized. Significant management judgment is required to determine the amount of deferred tax assets that can be recognized based upon the likely timing and level of future taxable profits.

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Share-Based Payments

The Company utilizes the Black-Scholes-Merton valuation model for estimating the fair value of its stock options as stated under Note 31. ‘Share-Based Payments’. Option valuation models, including Black-Scholes-Merton, require the input of highly subjective assumptions, and changes in the assumptions used can materially affect the grant date fair value of an award:

| • |  | Risk-Free Interest Rate: This is the average U.S. Treasury rate (having a term that most closely resembles the expected life of the option) at the date the option was granted.

| • |  | Dividend Yield: We have never declared or paid dividends on our common stock and do not anticipate declaring or paying any dividends in the foreseeable future.

| • |  | Expected Volatility: Volatility is a measure of the amount by which a financial variable such as a share price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. The Company uses a combination of the historical volatility of its stock price and the implied volatility of market-traded options of the Company’s stock to estimate the expected volatility assumption input to the Black-Scholes model in accordance with IFRS 2 ‘Share-based Payment’. The Company’s decision to use a combination of historical and implied volatility is based upon the availability of actively traded options of its stock and its assessment that such a combination is more representative of future expected stock price trends.

| • |  | Expected Life of the Option: This is the period of time that the options granted are expected to remain outstanding. The Company estimated the expected life by considering the historical exercise behavior. The Company uses an even exercise methodology, which assumes that all vested, outstanding options are exercised uniformly over the balance of their contractual life.

| • |  | Forfeiture Rate: This is the estimated percentage of options granted that are expected to be forfeited or cancelled on an annual basis before becoming fully vested. The Company estimated the forfeiture rate based on historical forfeiture experience.

Restricted Stock Units

Restricted stock units represent rights to receive common shares at a future date. The fair market value is determined based on the number of restricted stock units granted and the market value of the Company’s shares on the grant date. The fair market value at the time of the grant, less an estimate for pre-vesting forfeitures, is amortized to expense over the vesting period on a tranche-by-tranche basis.

7. | Summary of Significant Accounting Policies

7.1. | Business Combinations

Business combinations are accounted for using the acquisition method. The cost of an acquisition is measured as the aggregate of the consideration transferred, measured at acquisition date fair value and the amount of any non-controlling interest in the acquiree. The Group measures the non-controlling interest in the acquiree at fair-value. Acquisition related costs incurred are expensed.

When the Group acquires a business, it assesses the financial assets and liabilities assumed for appropriate classification and designation in accordance with the contractual terms, economic circumstances and pertinent conditions as at the acquisition date.

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Any contingent consideration to be transferred by the acquirer will be recognized at fair value at the acquisition date. Subsequent changes to the fair value of the contingent consideration which is deemed to be an asset or liability will be recognized either in profit or loss or as change to other comprehensive income. If the contingent consideration is classified as equity, it shall not be remeasured until it is finally settled within equity.

Goodwill is initially measured at cost being the excess of the consideration transferred and the amount recognized for non-controlling interest over the Group’s net identifiable assets acquired and liabilities assumed. If this consideration is lower than the fair value of the net assets of the subsidiary acquired, the difference is recognized in profit or loss.

After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, allocated to each of the Group’s cash generating units that are expected to benefit from the combination, irrespective of whether other assets or liabilities of the acquiree are assigned to those units.

Where goodwill forms part of a cash-generating unit and part of the operation within that unit is disposed of, the goodwill associated with the operation disposed of is included in the carrying amount of the operation when determining the gain or loss on disposal of the operation. Goodwill disposed of in this circumstance is measured based on the relative values of the operation disposed of and the portion of the cash-generating unit retained.

Management monitors and makes decisions regarding the Company’s operations on a functional specific and global level. Therefore, we concluded that the consolidated group as a whole qualifies as one cash generating unit.

7.2. | Investments in Associates

Investments in associates are accounted for using the equity method. An associate is an entity in which the Group has significant influence, generally participations of 20% or more of the voting power, but over which it does not exercise management control.

Under the equity method, the investment in the associate is carried in the statement of financial position at cost plus post acquisition changes in the Group’s share of net assets of the associate.

After application of the equity method, the Group determines whether it is necessary to recognize an additional impairment loss on the Group’s investment in its associates. The Group determines at each reporting date whether there is any objective evidence that the investment in the associate is impaired. If this is the case the Group calculates the amount of impairment as the difference between the recoverable amount of the associate and its carrying value and recognizes the amount in the income statement.

Upon loss of significant influence over the associate, the Group measures and recognizes any retaining investment at its fair value.

7.3. | Foreign Currency Translation

The Company’s presentation currency is the U.S. dollar (US$) which is also the parents company’s functional currency. The subsidiaries’ functional currencies are the local currency of the respective country with the exception of QIAGEN Finance (Luxembourg) S.A. and QIAGEN Euro Finance (Luxembourg) S.A. which functional currencies is the U.S. dollar. Statements of financial position prepared in their functional currencies are translated to the presentation currency at exchange rates in effect at the end of the accounting period except for shareholders’ equity accounts, which are translated at rates in effect when these balances were originally recorded. Revenue and expense accounts are translated at a weighted average of exchange rates during the period. The cumulative effect of translation is included in shareholders’ equity. On disposal of the Group Company, such translation differences are recognized in the income statement as part of the gain or loss on sale.

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Foreign currency transactions are translated using the exchange rate prevailing at the dates of the transactions. Foreign currency transaction gains and losses are included in the income statement, except for those related to intercompany transactions of a long-term investment nature which represent in substance part of the reporting entity’s net investment in a foreign entity; such gains and losses are included in the cumulative foreign currency translation adjustments component of shareholders’ equity. The exchange rates of key currencies affecting the Company were as follows:

|  | Closing rate as at December 31, |  |  | Annual average rate |
(US$ equivalent for one) |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Euro (EUR) |  |  | 1,2939 |  |  |  | 1,3362 |  |  |  | 1,3917 |  |  |  | 1,3268 |
Pound Sterling (GBP) |  |  | 1,5490 |  |  |  | 1,5524 |  |  |  | 1,6035 |  |  |  | 1,5457 |
Swiss Franc (CHF) |  |  | 1,0644 |  |  |  | 1,0686 |  |  |  | 1,1302 |  |  |  | 0,9612 |
Australian Dollar (AUD) |  |  | 1,0170 |  |  |  | 1,0172 |  |  |  | 1,0323 |  |  |  | 0,9198 |
Canadian Dollar (CAD) |  |  | 0,9791 |  |  |  | 1,0030 |  |  |  | 1,0117 |  |  |  | 0,9710 |
Japanese Yen (JPY) |  |  | 0,0129 |  |  |  | 0,0123 |  |  |  | 0,0125 |  |  |  | 0,0114 |
Chinese Yuan (CNY) |  |  | 0,1586 |  |  |  | 0,1515 |  |  |  | 0,1547 |  |  |  | 0,1478 |

7.4. | Revenue Recognition

Revenue from the sale of products and from the sale and/or licensing of technologies is recognized upon transfer of significant risks and rewards of ownership to the customer. For instrumentation equipment sales that contain other obligations, such as providing consumables, advanced training, extended warranty services or preventative maintenance contracts, revenue is allocated based on the relative fair values of the individual components as determined by list prices. Revenues for extended warranty services or product maintenance contracts are recognized on a straight-line basis over the contract period.

Revenue from the sales of products is reported net of sales and value added taxes, rebates and discounts and after eliminating sales within the Group. Provisions for rebates and discounts are recognized in the same period that the related sales are recorded, based on the contract terms and historical experience. Provisions for product returns are made based on historical trends and specific knowledge of any customer’s intent to return products. Royalty and licensing incomes are recognized on an accrual basis in accordance with the economic substance of the agreement. Revenue from the rendering of services is recognized as the service is rendered over the contract period and reported as part of revenue from the sale of products.

Consumable and Related Products

Revenue from consumable product sales is generally recognized upon transfer of title consistent with the shipping terms. Per the Company’s usual shipping terms, title and risk of loss pass to the customer upon delivery of product to the shipping location. The Company maintains a small amount of consignment inventory at certain customer locations. Revenues for the consumable products which are consigned in this manner are recognized upon consumption. The Company generally allows returns of consumable products if the product is returned in a timely manner and in good condition. Allowances for returns are provided for based upon the historical pattern of returns and Management’s evaluation of specific factors that impact the risk of returns.

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Related revenue includes license fees, intellectual property and patent sales, royalties and milestone payments. License fees from research collaborations include payments for technology transfer and access rights. Non-refundable, up-front payments received in connection with collaborative research and development agreements are generally deferred and recognized on a straight-line basis over the contract period during which there is any continuing obligation. Payments for milestones, generally based on the achievement of substantive and at-risk performance criteria, are recognized in full at such time as the specified milestone has been achieved according to the terms of the agreement. Royalties from licensees are based on reported sales of licensed products and revenues are calculated based on contract terms when reported sales are reliably measurable, fees are fixed and determinable and collectability is reasonably assured.

Instrumentation

Revenue from instrumentation includes the instrumentation equipment, installation, training and other instrumentation services, such as extended warranty services or product maintenance contracts. Revenue from instrumentation equipment is generally recognized when title passes to the customer, upon either shipment or written customer acceptance after satisfying any installation and training requirements. For instrumentation equipment sales that contain other obligations, such as providing consumables, advanced training, separately-priced extended warranty services or separately-priced extended maintenance contracts, revenue is first allocated to separately-priced extended warranty or maintenance contracts based on the stated contract price, then the remaining contract value is allocated to the remaining elements based on objective, verifiable evidence of the fair value of the individual components. The price charged when the element is sold separately generally determines its fair value. Revenues for extended warranty services or extended product maintenance contracts are deferred and recognized on a straight-line basis over the contract period.

We also enter into arrangements whereby revenues are derived from multiple deliverables. In these arrangements, we record revenue as the separate elements are delivered to the customer if the delivered item is determined to represent a separate earnings process, there is objective and reliable evidence of the fair value of the undelivered item, and delivery or performance of the undelivered item is probable and substantially in our control. For instruments where installation is determined to be a separate earnings process, the portion of the sales price allocable to the fair value of the installation is deferred and recognized when installation is complete. We determine the fair value of the installation process based on technician labor billing rates, the expected number of hours to install the instrument based on historical experience, and amounts charged by third-parties. We continually monitor the level of effort required for the installation of our instruments to ensure that appropriate fair values have been determined.

Shipping and Handling Income and Costs

Shipping and handling costs charged to customers are recorded as revenue in the period that the related product sale revenue is recorded. Associated costs of shipping and handling are included in sales and marketing expenses.

Advertising Costs

The costs of advertising are expensed as incurred and are included as a component of sales and marketing expense.

General and Administrative, Integration and Other

General and administrative expenses primarily represent the costs required to support administrative infrastructure. In addition, we incur indirect acquisition and business integration costs in connection with purchase business combinations. These costs represent incremental costs that we believe would not have been incurred absent the business combinations. Major components of these costs include payroll and related costs for employees remaining with the Company on a transitional basis; public relations, advertising and media costs for re-branding of the combined organization; and, consulting and related fees incurred to integrate or restructure the acquired operations. Other costs include relocation and restructuring costs. These costs are expensed as incurred.

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7.5. Research and Development

Research costs are expensed as incurred. Development expenditures on an individual project are recognized as an intangible asset when the Group can demonstrate:

| • |  | The technical feasibility of completing the intangible asset so that it will be available for use or sale.

| • |  | Its intention to complete and its ability to use or sell the asset.

| • |  | How the asset will generate future economic benefits.

| • |  | The availability of resources to complete the asset.

| • |  | The ability to measure reliably the expenditure during development.

Following initial recognition of the development expenditure as an asset, the cost model is applied requiring the asset to be carried at cost less any accumulated amortization and accumulated impairment losses.

Amortization of the asset begins when development is complete and the asset is available for use. It is amortized over the period of expected future benefit. Amortization is recorded in cost of sales. During the period of development, the asset is tested for impairment annually. The capitalized expenses are amortized on a straight-line basis over their estimated useful lives (between two and twelve years).

7.6. Government Grants

We recognize government grants when there is reasonable assurance that all conditions will be complied with and the grant will be received. Our government grants generally represent subsidies for specified activities and are therefore recognized when earned as a reduction of the expenses recorded for the activity that the grants are intended to compensate. Thus, when the grant relates to research and development expense, the grant is recognized over the same period that the related costs are incurred. Otherwise, amounts received under government grants are recorded as liabilities in the statement of financial position. When the grant relates to an asset, the value of the grant is deducted from the carrying amount of the asset and recognized over the same period that the related asset is depreciated.

7.7. Borrowing Costs

Borrowing costs directly attributable to the acquisition, construction or production of an asset that necessarily takes a substantial period of time to get ready for its intended use or sale are capitalized as part of the cost of the respective assets (qualifying asset). All other borrowing costs are expensed in the period they occur.

7.8. Pension Obligations

The Group operates a number of defined benefit and defined contribution plans. For defined benefit plans, the Group companies provide for benefits payable to their employees on retirement by charging current service costs to income. The defined benefit liability comprises the present value of the defined benefit obligation less past service cost and actuarial gains and losses not yet recognized and less the fair value of plan assets out of which the obligations are to be settled directly. Defined benefit obligation is calculated annually by independent actuaries using the projected unit

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credit method, which reflects services rendered by employees to the date of valuation, incorporates assumptions concerning employees’ projected salaries and uses interest rates of highly liquid corporate bonds which have terms to maturity approximating the terms of the related liability. Significant actuarial gains or losses arising from experience adjustments, changes in actuarial assumptions and amendments to pension plans are charged or credited to income over the average service life of the related employees when they exceed the corridor. The Group’s contributions to the defined contribution pension plans are charged to the income statement in the year to which they relate. The cost of providing benefits under the defined benefit plans is determined separately for each plan using the projected unit credit method. Actuarial gains and losses are recognized as income or expense when the net cumulative unrecognized actuarial gains and losses for each individual plan at the end of the previous reporting period exceed 10% of the higher of the defined benefit obligation and the fair value of plan assets at that date. These gains or losses are recognized over the expected average remaining working lives of the employees participating in the plans.

7.9. Share-Based Payments

The Company has a stock option plan, which is described in detail under 33. ‘Share-Based Payments’. A compensation charge is calculated at the date the options are granted. This charge is recognized over the stock option’s vesting period. When the option is exercised, the proceeds received net of any transaction costs are credited to share capital and share premium.

7.10. Taxation

Taxes reported in the consolidated income statements include current and deferred income taxes.

Current income tax

Current income tax assets and liabilities for the current and prior periods are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted, by the reporting date, in the countries where the Group operates and generates taxable income.

Current income tax relating to items recognized directly in equity is recognized in equity and not in the income statement. Management periodically evaluates positions taken in the tax returns with respect to situations in which applicable tax regulations are subject to interpretation and establishes provisions where appropriate.

Deferred tax

Deferred tax is provided using the liability method on temporary differences at the reporting date between the tax bases of assets and liabilities and their carrying amounts for financial reporting purposes.

Deferred tax assets and liabilities are measured at the tax rates that are expected to apply in the year when the asset is realized or the liability is settled, based on tax rates (and tax laws) that have been enacted or substantively enacted at the reporting date.

Deferred tax relating to items recognized outside profit or loss is recognized outside profit or loss. Deferred tax items are recognized in correlation to the underlying transaction either in other comprehensive income or directly in equity.

Deferred tax assets and deferred tax liabilities are offset, if a legally enforceable right exists to set off current tax assets against current income tax liabilities and the deferred taxes relate to the same taxable entity and the same taxation authority.

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Uncertain tax positions

Uncertainties exist with respect to the interpretation of complex tax regulations, changes in tax laws, and the amount and timing of future taxable income. Given the wide range of international business relationships and the long-term nature and complexity of existing contractual agreements, differences arising between the actual results and the assumptions made, or future changes to such assumptions, could necessitate future adjustments to tax income and expense already recorded.

The Group establishes provisions, based on reasonable estimates, for possible consequences of audits by the tax authorities of the respective counties in which it operates. The amount of such provisions is based on various factors, such as experience of previous tax audits and differing interpretations of tax regulations by the taxable entity and the responsible tax authority. Such differences of Interpretation may arise on a wide variety of issues depending on the conditions prevailing in the respective Group Company’s domicile. As the Group assesses the probability for litigation and subsequent cash outflow with respect to taxes as remote, no contingent liability has been recognized.

7.11. Financial Assets

The Group classifies its financial assets in the following categories: at fair value through profit or loss (FVTPL), loans and receivables (LaR), held-to maturity, and available for sale (Afs), or as derivatives designated as hedging instruments in an effective hedge, as appropriate. The Group determines the classification of its financial assets at initial recognition.

All financial assets are recognized initially at fair value plus, in the case of investments not at fair value through profit or loss, directly attributable transaction costs.

The Group’s financial assets include cash and short-term deposits, trade and other receivables, loan and other receivables, quoted and unquoted financial instruments, and derivative financial instruments.

Financial assets are derecognized when the rights to receive cash flows from the assets have expired, the Group retains the right to receive cash flows from the assets, but has assumed an obligation to pay them in full without material delay to a third party under a ‘pass through’ arrangement, or the Group has transferred its rights to receive cash flows from the assets and either (a) has transferred substantially all the risks and rewards of the assets or (b) has neither transferred nor retained substantially all the risks and rewards of the assets, but has transferred control of the assets.

Where the Group has transferred its rights to receive cash flows from assets and has neither transferred nor retained substantially all the risks and rewards of the assets nor transferred control of the assets, the assets are recognized to the extent of the Group’s continuing involvement in the assets. Continuing involvement that takes the form of a guarantee over the transferred assets is measured at the lower of the original carrying amount of the assets and the maximum amount of consideration that the Group could be required to repay.

Continuing involvement that takes the form of a guarantee over the transferred asset is measured at the lower of the original carrying amount of the asset and the maximum amount of consideration that the Group could be required to repay.

Financial assets at fair value through profit or loss (FVTPL)

Financial assets at fair value through profit or loss include derivative financial instruments not designated as hedging instrument and financial assets designated upon initial recognition at fair value through profit or loss. Financial assets are classified as at fair value through profit or loss if they are acquired for the purpose of selling or repurchasing in the near term.

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Financial assets at fair value through profit and loss are carried in the statement of financial position at fair value with changes in fair value recognized in finance income or finance cost in the income statement.

The Group has not designated any financial assets upon initial recognition as at fair value through profit or loss.

The Group evaluated its financial assets at fair value through profit and loss whether the intent to sell them in the near term is still appropriate. When the Group is unable to trade these financial assets due to inactive markets and management’s intent to sell them in the foreseeable future significantly changes, the Group may elect to reclassify these financial assets in rare circumstances. The reclassification to loans and receivables, available-for-sale or held to maturity depends on the nature of the asset. This evaluation does not affect any financial assets designated at fair value through profit or loss using the fair value option at designation.

This category includes derivative financial instruments entered into by the Group that are not designated as hedging instruments and hedge relations as defined by IAS 39 Derivatives.

Loans and receivables (LaR)

Loans and receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. After initial measurement, such financial assets are subsequently measured at amortized cost using the effective interest rate method, less impairment. Amortized cost is calculated by taking into account any discount or premium on acquisition and fee or costs that are an integral part of the effective interest rate.

The effective interest rate amortization is included in finance income in the income statement. The losses arising from impairment are recognized in the income statement in finance costs

Held-to-maturity investments

Non-derivative financial assets with fixed or determinable payments and fixed maturities are classified as held-to maturity when the Group has the positive intention and ability to hold it to maturity. After initial measurement held-to-maturity investments are measured at amortized cost using the effective interest method, less impairment. Amortized cost is calculated by taking into account any discount or premium on acquisition and fee or costs that are an integral part of the effective interest rate. The effective interest rate amortization is included in finance income in the income statement. The losses arising from impairment are recognized in the income statement in finance costs. The Group did not have any held-to-maturity investments during the years ended December 31, 2011 and 2010.

Available-for-sale financial investments (Afs)

Available-for-sale financial investments include equity and debt securities. Equity investments classified as available-for sale are those, which are neither classified as held for trading nor designated at fair value through profit or loss. Debt securities in this category are those which are intended to be held for an indefinite period of time and which may be sold in response to needs for liquidity or in response to changes in the market conditions.

After initial measurement, available-for-sale financial investments are subsequently measured at fair value with unrealized gains or losses recognized as other comprehensive income in the available-for-sale reserve until the investment is derecognized, at which time the cumulative gain or loss is recognized in other financial income and expense, or determined to be impaired, at which time the cumulative loss is recognized in the income statement in other financial income and expense and removed from the available-for-sale reserve.

The Group evaluated its available-for-sale financial assets whether the ability and intention to sell them in the near term is still appropriate. When the Group is unable to trade these financial assets due to inactive markets and management’s intent significantly changes to do so in the foreseeable future, the Group may elect to reclassify these financial assets in rare circumstances. Reclassification to loans and receivables is permitted when the financial asset meets the definition of loans and receivables and has the intent and ability to hold these assets for the foreseeable future or maturity.

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For a financial asset reclassified out of the available-for-sale category, any previous gain or loss on that asset that has been recognized in equity (Available-for-sale reserve in other comprehensive income) is amortized to profit or loss over the remaining life of the investment using the effective interest rate. Any difference between the new amortized cost and the expected cash flows is also amortized over the remaining life of the asset using the effective interest rate. If the asset is subsequently determined to be impaired then the amount recorded in equity is reclassified to the income statement other financial income and expense.

7.12. Financial Liabilities

Financial liabilities within the scope of IAS 39 are classified as financial liabilities at fair value through profit or loss, loans and borrowings, or as derivatives designated as hedging instruments in an effective hedge, as appropriate. The Group determines the classification of its financial liabilities at initial recognition.

All financial liabilities are recognized initially at fair value and in the case of loans and borrowings, plus directly attributable transaction costs.

The Group’s financial liabilities include trade and other payables, bank overdraft, loans and borrowings, financial guarantee contracts, and derivative financial instruments.

A financial liability is derecognized when the obligation under the liability is discharged or cancelled or expires.

When an existing financial liability is replaced by another from the same lender on substantially different terms, or the terms of an existing liability are substantially modified, such an exchange or modification is treated as a derecognition of the original liability and the recognition of a new liability, and the difference in the respective carrying amounts is recognized in the income statement.

Financial liabilities at fair value through profit or loss

Financial liabilities are classified at fair value through profit or loss if they are acquired for the purpose of selling in the near term. This category includes derivative financial instruments entered into by the Group that are not designated as hedging instruments in hedge relationships as defined by IAS 39.

Gains or losses on liabilities at fair value through profit or losses are recognized in the income statement.

The Group has not designated any financial liabilities upon initial recognition as at fair value through profit or loss.

Loans and borrowings

After initial recognition, interest bearing loans and borrowings are subsequently measured at amortized cost using the effective interest rate method. Gains and losses are recognized in the income statement when the liabilities are derecognized as well as through the effective interest rate method amortization process.

Amortized cost is calculated by taking into account any discount or premium on acquisition and fee or costs that are an integral part of the effective interest rate. The effective interest rate amortization is included in finance cost in the income statement.

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7.13. Offsetting of Financial Instruments

Financial assets and financial liabilities are offset and the net amount reported in the consolidated statement of financial position if, and only if, there is a currently enforceable legal right to offset the recognized amounts and there is an intention to settle on a net basis, or to realize the assets and settle the liabilities simultaneously.

7.14. Fair Value of Financial Instruments

The fair value of financial instruments that are traded in active markets at each reporting date is determined by reference to quoted market prices or dealer price quotations (mid-price), without any deduction for transaction costs.

For financial instruments not traded in an active market, the fair value is determined using appropriate valuation techniques. Such techniques may include using recent arm’s length market transactions; reference to the current fair value of another instrument that is substantially the same; discounted cash flow analysis or other valuation models.

An analysis of fair values of financial instruments and further details as to how they are measured are provided in Note 29. ‘Fair Value Measurements’.

7.15. Derivative Financial Instruments and Hedge Accounting

Initial recognition and subsequent measurement The Group uses derivative financial instruments such as forward currency contracts and interest rate swaps contracts to hedge its foreign currency risks and interest rate risks. Such derivative financial instruments are initially recognized at fair value on the date on which a derivative contract is entered into and are subsequently re-measured at fair value. Derivatives are carried as financial assets when the fair value is positive and as financial liabilities when the fair value is negative.

Any gains or losses arising from changes in fair value on derivatives are taken directly to the income statement, except for the effective portion of cash flow hedges, which is recognized in other comprehensive income (cash flow hedge reserve).

For the purpose of hedge accounting, hedges are classified as:

Cash flow hedges when hedging exposure to variability in cash flows that is either attributable to a particular risk associated with a recognized asset or liability or a highly probable forecast transaction or the foreign currency risk in an unrecognized firm commitment.

At the inception of a hedge relationship, the Group formally designates and documents the hedge relationship to which the Group wishes to apply hedge accounting and the risk management objective and strategy for undertaking the hedge. The documentation includes identification of the hedging instrument, the hedged item or transaction, the nature of the risk being hedged and how the entity will assess the effectiveness of changes in the hedging instrument’s fair value in offsetting the exposure to changes in the hedged item’s fair value or cash flows attributable to the hedged risk. Such hedges are expected to be highly effective in achieving offsetting changes in fair value or cash flows and are assessed on an ongoing basis to determine that they actually have been highly effective throughout the financial reporting periods for which they were designated.

Cash flow hedges

The effective portion of the gain or loss on the hedging instrument is recognized directly as other comprehensive income in the cash flow hedge reserve, while any ineffective portion is recognized immediately in the income statement in finance costs.

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Amounts recognized as other comprehensive income are transferred to the income statement when the hedged transaction affects profit or loss, such as when the hedged financial income or financial expense is recognized or when a forecast sale occurs. Where the hedged item is the cost of a non-financial asset or non-financial liability, the amounts recognized as other comprehensive income are transferred to the initial carrying amount of the nonfinancial asset or liability.

If the forecast transaction or firm commitment is no longer expected to occur, the cumulative gain or loss previously recognized in equity are transferred to the income statement. If the hedging instrument expires or is sold, terminated or exercised without replacement or rollover, or if its designation as a hedge is revoked, any cumulative gain or loss previously recognized in other comprehensive income remains in other comprehensive income until the forecast transaction or firm commitment affects profit or loss.

The Group uses forward currency contracts as hedges of its exposure to foreign currency risk in forecasted transactions and firm commitments. Refer to Note 35. ‘Financial Risk Factors and Use of Derivative Financial Instruments’ for more details.

7.16. Cash and Cash Equivalents

Cash and cash equivalents consist of cash on deposit in banks and other cash invested temporarily in various instruments that are short-term and highly liquid, and having an original maturity of less than 90 days at the date of purchase and which are readily convertible to known amounts of cash. This definition is also used for the consolidated statements of cash flows. The Company maintains its cash accounts in highly qualified institutions.

7.17. Inventories

Inventories are stated at the lower of cost and net realizable value. The moving average method of valuation is used. The cost of work in process and finished goods includes raw materials, direct labor and production overhead expenditure based upon normal operating capacity. Net realizable value is the estimated selling price in the ordinary course of business less the cost of completion and distribution expenses. Provisions are established for slow-moving and obsolete inventory.

7.18. Property, Plant and Equipment

Property, plant and equipment, including equipment under finance lease, are stated at cost of acquisition or construction cost less accumulated depreciation and accumulated impairment in value. Depreciation is computed using the straight-line and declining balance methods over the following estimated useful lives of the assets:

Buildings and improvements |  | 1-40 years
Machinery and equipment |  | 1-15 years
Furniture and office equipment |  | 1-15 years

Land is not depreciated. Construction costs include borrowing costs and operating expenses that are directly attributable to items of property, plant and equipment capitalized during construction. Borrowing costs incurred for the construction of any qualifying asset are capitalized during the period of time that is required to complete and prepare the asset for its intended use. Subsequent expenditure on an item of property, plant and equipment is capitalized at cost only when it is probable that future economic benefits associated with the item will flow to the Group and the cost of the item can be measured reliably. Repair and maintenance costs are expensed as incurred. Gains and

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losses on disposal or retirement of items of property, plant and equipment are determined by comparing the proceeds received with the carrying amounts and are included in the consolidated income statements. The asset’s residual values, useful lives and methods of depreciation are reviewed, and adjusted if appropriate, at each financial year end.

7.19. Leases

The determination of whether an arrangement is, or contains, a lease is based on the substance of the arrangement at inception date: whether fulfillment of the arrangement is dependent on the use of a specific asset or assets or the arrangement conveys a right to use the asset.

Group as a lessee

Finance leases, which transfer to the Group substantially all the risks and benefits incidental to ownership of the leased item, are capitalized at the commencement of the lease at the fair value of the leased property or, if lower, at the present value of the minimum lease payments. Lease payments are apportioned between finance charges and reduction of the lease liability so as to achieve a constant rate of interest on the remaining balance of the liability. Finance charges are recognized in the income statement.

Leased assets are depreciated over the useful life of the asset. However, if there is no reasonable certainty that the Group will obtain ownership by the end of the lease term, the asset is depreciated over the shorter of the estimated useful life of the asset and the lease term.

Operating lease payments are recognized as an expense in the income statement on a straight line basis over the lease term.

Group as a lessor

Leases where the Group does not transfer substantially all the risks and benefits of ownership of the asset are classified as operating leases. Initial direct costs incurred in negotiating an operating lease are added to the carrying amount of the leased asset and recognized over the lease term on the same bases as rental income. Contingent rents are recognized as revenue in the period in which they are earned.

7.20. Intangible Assets

Intangible assets acquired separately are measured on initial recognition at cost. The cost of intangible assets acquired in a business combination is its fair value as at the date of acquisition. Expenditure on acquired technology rights, patents, trademarks and licenses are capitalized as intangible assets when it is probable that future economic benefits will flow to the Group and the cost can be measured reliably. Following initial recognition, intangible assets are carried at cost less any accumulated amortization and any accumulated impairment losses.

Amortization expense related to developed technology and patent and license rights acquired in a business combination is included in cost of sales. Amortization of trademarks, customer base and non-compete agreements acquired in a business combination is recorded in operating expense under the caption “purchased intangibles amortization.” Amortization expenses of intangible assets not acquired in a business combination are recorded within cost of sales, research and development, or sales and marketing line items based on the use of the asset.

The useful lives of intangible assets are assessed as either finite or indefinite. Intangible assets with finite lives are amortized over the useful economic life and assessed for impairment whenever there is an indication that the intangible asset may be impaired. The amortization period and the amortization method for an intangible asset with a finite useful life is reviewed at least at each financial year end. Changes in the expected useful life or the expected

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pattern of consumption of future economic benefits embodied in the asset is accounted for by changing the amortization period or method, as appropriate, and are treated as changes in accounting estimates. The amortization expense on intangible assets with finite lives is recognized in the income statement in the expense category consistent with the function of the intangible asset.

Technology rights, patents, trademarks and licenses are amortized on a straight-line basis over their estimated useful lives as follows:

Technology rights and patents |  | 5-15 years
Computer software |  | 1-10 years
Development expenses |  | 3-14 years
Other intellectual properties |  | 3-14 years

7.21. Impairment

Impairment of financial assets

The Group assesses at each reporting date whether there is any objective evidence that a financial asset or a group of financial assets is impaired. A financial asset or a group of financial assets is deemed to be impaired if, and only if, there is objective evidence of impairment as a result of one or more events that has occurred after the initial recognition of the asset (an incurred ‘loss event’) and that loss event has an impact on the estimated future cash flows of the financial asset or the group of financial assets that can be reliably estimated. Evidence of impairment may include indications that the debtors or a group of debtors is experiencing significant financial difficulty, default or delinquency in interest or principal payments, the probability that they will enter bankruptcy or other financial reorganization and where observable data indicate that there is a measurable decrease in the estimated future cash flows, such as changes in arrears or economic conditions that correlate with defaults.

Impairment of non-financial assets

The Group assesses at each reporting date whether there is an indication that an asset may be impaired. If any indication exists, or when annual impairment testing for an asset is required, the Group estimates the asset’s recoverable amount. An asset’s recoverable amount is the higher of an asset’s or cash-generating unit’s (CGU) fair value less costs to sell and its value in use and is determined for an individual asset, unless the asset does not generate cash inflows that are largely independent of those from other assets or groups of assets. Where the carrying amount of an asset or CGU exceeds its recoverable amount, the asset is considered impaired and is written down to its recoverable amount. In assessing value in use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset. In determining fair value less costs to sell, an appropriate valuation model is used. These calculations are corroborated by valuation multiples, quoted share prices for publicly traded subsidiaries or other available fair value indicators.

Impairment losses are recognized in the income statement in those expense categories consistent with the function of the impaired asset, except for property previously revalued where the revaluation was taken to other comprehensive income. In this case, the impairment is also recognized in other comprehensive income up to the amount of any previous revaluation.

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For assets excluding goodwill, an assessment is made at each reporting date as to whether there is any indication that previously recognized impairment losses may no longer exist or may have decreased. If such indication exists, the Group estimates the asset’s or cash-generating unit’s recoverable amount. A previously recognized impairment loss is reversed only if there has been a change in the assumptions used to determine the asset’s recoverable amount since the last impairment loss was recognized. The reversal is limited so that the carrying amount of the asset does not exceed its recoverable amount, nor exceed the carrying amount that would have been determined, net of depreciation, had no impairment loss been recognized for the asset in prior years. Such reversal is recognized in the income statement unless the asset is carried at a revalued amount, in which case the reversal is treated as a revaluation increase.

Goodwill

Goodwill is tested for impairment annually and when circumstances indicate that the carrying value may be impaired.

Impairment is determined for goodwill by assessing the recoverable amount of each cash-generating unit (or group of cash-generating units) to which the goodwill relates. Where the recoverable amount of the cash generating unit is less than their carrying amount an impairment loss is recognized. Impairment losses relating to goodwill cannot be reversed in future periods.

Intangible assets

Intangible assets with indefinite useful lives are tested for impairment annually as at December 31 either individually or at the cash generating unit level, as appropriate and when circumstances indicate that the carrying value may be impaired.

7.22. Provisions

Provisions are recognized by the Group when a present legal or constructive obligation exists as a result of past events, it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation and a reliable estimate of the amount of the obligation can be made. Where the effect of the time value of money is material, the amount of a provision is the present value of the expenditures expected to be required to settle the obligation. Where discounting is used, the increase in the provision due to the passage of time is recognized as a financing cost.

Restructuring provisions are recorded in the period in which management has committed to a detailed formal plan, has raised a valid expectation in those affected that it will carry out the restructuring and it becomes probable that a liability will be incurred and the amount can be reasonably estimated. Restructuring provisions comprise lease termination penalties, other penalties and employee termination payments.

7.23. Segment Reporting

In connection with recent acquisitions and internal restructurings, the Company has determined it operates as one operating segment. The Company’s chief operating decision maker (CODM) makes decisions based on the Company as a whole. In addition, the Company shares the common basis of organization and types of products and services which derive revenues and consistent product margins. Accordingly, the Company operates and makes decisions as one reporting unit.

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7.24. Cash Flow Statement

The cash flow statement provides an explanation of the changes in cash and cash equivalents. It is prepared on the basis of a comparison of the statements of financial position as of January 1 and December 31 using the indirect method. Investing and financing transactions that do not require the use of cash or cash equivalents have been excluded from the cash flow statement. In 2011 and 2010 such eliminations primarily related to non-cash impacts from the convertible bonds.

8. | Earnings per Share

Basic Earnings per Share

Basic earnings per share is calculated by dividing the net income attributable to shareholders by the weighted average number of shares outstanding during the year.

Diluted earnings per share

For diluted earnings per share, the weighted average number of common shares outstanding is adjusted to assume conversion of all potential dilutive shares arising from outstanding stock options and the convertible bond. For stock options, a calculation is made to determine the number of shares that could have been acquired at fair value based on proceeds from the exercise of stock options. The number of shares calculated as above is compared with the number of shares that would have been issued assuming the exercise of the stock options. The difference is added to the denominator as additional shares for no consideration. There is no adjustment made to the numerator. In 2011, share equivalents of 2.876.000 common shares (2010: 2.843.000 common shares) arising from stock options granted to employees and directors were included in calculating diluted earnings per share. In 2011, 3.995.000 outstanding stock options (2010: 2.152.000 stock options) were not considered in the calculation as they were anti-dilutive.

For the convertible bonds, the number of shares into which the bonds are assumed to be fully convertible is added to the denominator. The numerator is increased by eliminating the interest expense, net of tax that would not be incurred if the bonds were converted. In 2011 and 2010, the effect of the convertible bonds was excluded from calculating diluted earnings per share as it was antidilutive.

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9. | Reconciliation of Reported to Adjusted Results (Non-IFRS)

(in US$ thousands, except per share data) |  | 2011 |  |  | 2010 |
Gross profit, as reported |  |  | 748.356 |  |  |  | 715.562 |
Business integration, acquisition related and restructuring costs |  |  | 10.850 |  |  |  | 1.322 |
Purchased intangibles amortization |  |  | 70.176 |  |  |  | 61.777 |
Share-based compensation |  |  | 3.125 |  |  |  | 932 |
Gross profit, as adjusted |  |  | 832.507 |  |  |  | 779.593 |
Gross margin, as adjusted |  |  | 71,2 | % |  |  | 71,7 | %
Income from operations, as reported |  |  | 30.320 |  |  |  | 196.498 |
Business integration, acquisition related and restructuring cost |  |  | 152.170 |  |  |  | 20.808 |
Purchased intangibles amortization |  |  | 107.553 |  |  |  | 88.365 |
Share-based compensation |  |  | 37.942 |  |  |  | 13.592 |
Income from operations, as adjusted |  |  | 327.985 |  |  |  | 319.263 |
Operating margin, as adjusted |  |  | 28,0 | % |  |  | 29,4 | %
Income before tax, as reported |  |  | 12.853 |  |  |  | 166.562 |
Business integration, acquisition related and restructuring cost |  |  | 152.170 |  |  |  | 21.224 |
Purchased intangibles amortization |  |  | 107.553 |  |  |  | 88.365 |
Share-based compensation |  |  | 37.942 |  |  |  | 13.592 |
Interest expense from bifurcation of convertible debt |  |  | 13.066 |  |  |  | 14.332 |
Other financial income |  |  | (10.608 | ) |  |  | (604 | )
Income before tax, as adjusted |  |  | 312.976 |  |  |  | 303.471 |
Income taxes as reported |  |  | 29.199 |  |  |  | (24.565 | )
Income taxes on adjustments |  |  | (102.367 | ) |  |  | (44.452 | )
Net income for the period, as adjusted |  |  | 239.808 |  |  |  | 234.454 |
Effective income tax rate, as adjusted |  |  | 23,3 | % |  |  | 22,7 | %
Earnings per share attributable to equity holders of the parent - as adjusted |  |  |  |  |  |  |  |
Weighted average number of common shares (diluted) |  |  | 236.726 |  |  |  | 235.478 |
Diluted in US$ per share, as adjusted |  | $ | 1,01 |  |  | $ | 1,00 |
Diluted in US$ per share, as reported |  | $ | 0,18 |  |  | $ | 0,60 |

In its press releases QIAGEN reports adjusted results, to give additional insight into the financial performance of the Group. Adjusted results should be considered in addition to the reported results prepared in accordance with International Financial Reporting Standards, but should not be considered as a substitute. The company believes certain items should be excluded from adjusted results when they are outside of its on-going core operations, vary significantly from period to period, or affect the comparability of results with the company’s competitors and its own prior periods.

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10. | Acquisitions

2011 Acquisitions (including noncontrolling interest)

On August 29, 2011, we acquired all outstanding shares of Cellestis Ltd., a publicly listed Australian company, for US$ 372,5 million in cash. Cellestis develops and provides in-vitro diagnostics and life science research products based on its proprietary QuantiFERON® technology. The technology provides information on the activity of the cell-mediated functions of the immune system from whole blood samples. By tapping into the body’s memory system, this approach allows diseases to be detected much earlier than with other diagnostic methods, such as PCR. With QuantiFERON®, we are adding a “pre-molecular” technology that allows us to look even deeper than with DNA-based molecular testing and thereby strive to feed and drive our DNA-based molecular franchise. QuantiFERON® is a trademark of Cellestis, Ltd.

On July 8, 2011, the Board of Directors of Ipsogen S.A. voted in favor of QIAGEN’s offer for EUR 12,90 per share and QIAGEN entered into binding agreements with a group of major shareholders of Ipsogen to purchase a majority of the Ipsogen shares. Ipsogen, a publicly listed company founded in 1999 and based in Marseille, France, is a global leader in molecular profiling and personalized healthcare diagnostics for a broad range of applications in the field of hematology. The acquisition of Ipsogen provides QIAGEN access to a broad range of assays covering 15 biomarkers used worldwide for the diagnosis, prognosis and monitoring of patients with various blood cancers. Many of these assays also are used as companion diagnostics in personalized healthcare to make and guide treatment decisions. Many of Ipsogen’s assays have CE-IVD Marking in Europe and have been developed for use on QIAGEN’s Rotor-Gene Q real-time PCR system. This has the potential to enable the smooth and rapid transfer of these unique products onto QIAGEN’s QIAsymphony RGQ, a novel integrated sample-to-result laboratory automation platform that includes the Rotor-Gene Q system.

On July 12, 2011, we paid EUR 40,9 million (US$ 57,4 million) for the initial 62,6% of Ipsogen outstanding common shares. On the acquisition date, the fair value of the noncontrolling interest was US$ 42,4 million and the fair value of all Ipsogen outstanding shares and other equity instruments was approximately EUR 70,2 million (US$ 99,9 million). The fair value of the noncontrolling interest was based on reference to quoted market values of Ipsogen stock. The assignment of the total consideration including the fair value of the noncontrolling interest as of the date of the acquisition is shown below.

Since QIAGEN held more than 50%, a public tender offer for the remaining shares at the same price was submitted and approved by the Autorité Des Marchés Financiers. As of December 31, 2011, we paid an additional US$ 29,8 million and hold 89,3% of the Ipsogen shares on a fully diluted basis.

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As of December 31, 2011, the preliminary purchase price allocations are as follows:

(in US$ thousands) |  | Total |  |  | Cellestis |  |  | Ipsogen |
Cash consideration |  |  | 429.888 |  |  |  | 372.452 |  |  |  | 57.436 |
Fair value of non-controlling interest |  |  | 42.437 |  |  |  | 0 |  |  |  | 42.437 |
Purchase Price |  |  | 472.325 |  |  |  | 372.452 |  |  |  | 99.873 |
Cash and cash equivalents |  |  | 19.607 |  |  |  | 13.636 |  |  |  | 5.971 |
Marketable securities |  |  | 5.060 |  |  |  | 0 |  |  |  | 5.060 |
Accounts receivable (trade), net |  |  | 8.004 |  |  |  | 4.583 |  |  |  | 3.421 |
Accounts payable |  |  | (4.165 | ) |  |  | (2.383 | ) |  |  | (1.782 | )
Other working capital |  |  | 3.633 |  |  |  | 1.057 |  |  |  | 2.576 |
Fixed and other non-current assets |  |  | 3.541 |  |  |  | 1.112 |  |  |  | 2.429 |
Developed intellectual property |  |  | 103.600 |  |  |  | 67.200 |  |  |  | 36.400 |
Customer relationships |  |  | 53.200 |  |  |  | 42.600 |  |  |  | 10.600 |
Tradenames |  |  | 13.500 |  |  |  | 12.000 |  |  |  | 1.500 |
Goodwill |  |  | 322.955 |  |  |  | 270.860 |  |  |  | 52.095 |
Deferred tax liability |  |  | (54.466 | ) |  |  | (37.981 | ) |  |  | (16.485 | )
Liabilities assumed |  |  | (2.144 | ) |  |  | (232 | ) |  |  | (1.912 | )
Preliminary allocation (fair values) |  |  | 472.325 |  |  |  | 372.452 |  |  |  | 99.873 |

In connection with the Ipsogen acquisition pre-acquisition contingencies in the amount of US$ 6,3 million have been recorded which relate to obligations incurred in connection with the transaction and royalty obligations. In connection with the Cellestis acquisition pre-acquisition contingencies in the amount of US$ 2,5 million have been recorded which relate to royalty obligations. It is expected that the cash outflows will take place within one year from the respective transaction dates.

Deferred tax liabilities are recognized on the fair value of the identifiable intangible assets acquired.

The allocations of the purchase prices are preliminary and are based upon information that was available to management at the time the financial statements were prepared. Accordingly, the allocation may change. We have gathered no information that indicates the final purchase price allocations will differ materially from the preliminary estimates other than for the final determination of the intangible assets acquired and the resulting deferred taxes with the acquisition of Cellestis and Ipsogen. Acquisition-related costs are expensed when incurred and are included in general, administrative, integration and other in the accompanying consolidated statements of income.

The amortization periods for the acquired intangible assets with definite lives of Cellestis and Ipsogen is 10 years for developed technology, customer relationships and trade names and 7 years for licenses. The goodwill acquired in these acquisitions is not deductible for tax purposes.

Since the acquisition date, the results of Cellestis and Ipsogen are included in the consolidated results through December 31, 2011. Net sales for the combined companies totaled US$ 28,6 million and net loss attributable to the owners of QIAGEN N.V. was US$ 1,7 million as of December 31, 2011. Acquisition-related costs for Cellestis and Ipsogen for the year-ended December 31, 2011 amounted to US$ 5,8 million and US$ 5,6 million, respectively.

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Pro forma results

The following unaudited pro forma information assumes that the above acquisitions occurred at the beginning of the periods presented. For the years ended December 31, 2011 and 2010, pro forma net sales would have been US$ 1.213,5 million and US$ 1.140,2 million, pro forma net income would have been US$ 55,6 million and US$ 136,9 million, and pro forma diluted net income per common share would have been US$ 0,23 and US$ 0,58, respectively. These unaudited pro forma results are intended for informational purposes only and are not necessarily indicative of the results of operations that would have occurred had the acquisitions been in effect at the beginning of the periods presented, or of future results of the combined operations. Due to the integration of the acquired entities into the existing structure of the Group it is impracticable to disclose the amount of the acquiree’s profit or loss which relates to the period subsequently to the acquisition and which is included in the profit of the Group for 2011. The integration of the acquired entities relates to the use of the Company’s existing infrastructure such as sales force, distribution channels and customer relations to expand sales of the acquired businesses’ products.

Other 2011 Acquisitions

During 2011, we completed three acquisitions which individually were not significant to the overall consolidated financial statements. The cash paid for other 2011 acquisitions, net of cash acquired, was US$ 47,9 million. Certain acquisitions included contingent consideration where we are required to assess the acquisition date fair value of the contingent consideration liabilities, which is recorded as part of the purchase consideration. This is discussed further in Note 29, “Fair Value Measurements,” where we continuously assess and adjust the fair value of the contingent consideration liabilities, if necessary, until the settlement or expiration of the contingency occurs. The total fair value of the milestone payments of approximately US$ 24,9 million, determined as of the acquisition date, has been recognized as purchase price. The fair value of the milestone payments of approximately US$ 23,5 million was determined using a discount rate of 0,80% and a probability regarding the accomplishment of the milestones of 90% to 100%. The fair value of the milestone payments of approximately US$ 1,4 million was determined using a discount rate of 3,25% with the assumption that only the first milestone will be met based on the assumptions of the business plan. Under the purchase agreements, we could be required to make additional contingent cash payments totaling US$ 44,0 million through 2016, of which US$ 24,9 million was accrued at December 31, 2011.

2010 Acquisitions

In 2010, we completed two acquisitions which individually were not significant to the overall consolidated financial statements. We acquired 100% of the shares of ESE GmbH, a privately held developer and manufacturer of UV and fluorescence optical measurement devices. ESE is based in Stockach, Germany. ESE has pioneered the development and manufacturing of optical measurement systems for medical and industrial applications. The systems utilize unique, high-performance and award-winning fluorescence detection technologies integrated into compact modules. We have demonstrated that ESE’s fluorescence detection systems can be used to measure signals generated by our existing testing technologies, including the HDA and tHDA isothermal assay systems. We also acquired the food market business of the Institute for Product Quality (ifp), a Berlin-based company which sells food, veterinary and environmental quality control assays. The transaction was an asset purchase of primarily patents, know-how, intellectual property rights and customer data related to the business. We have entered into license and contract manufacturing agreement with ifp under which ifp will perform the production for QIAGEN.

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Aggregate consideration paid in 2010 for the acquisitions was US$ 22,7 million and an amount of US$ 2,9 million was retained in an escrow account to cover any claims for breach of any representations, warranties or indemnities. During 2011 and 2010, US$ 1,3 million and US$ 1,6 million, respectively of the funds were released along with the preacquisition contingencies. Furthermore, the purchase agreements for both acquisitions included aggregate milestone payments of up to US$ 8,1 million. As of December 31, 2011 and 2010, US$ 2,6 million and US$ 5,2 million, respectively, was accrued.

Final allocation of 2009 acquisitions

DxS Ltd. Acquisition

On September 21, 2009, we acquired 100% of the outstanding shares of DxS Ltd. (DxS), a privately-held developer and manufacturer of companion diagnostic products headquartered in Manchester, United Kingdom. With this acquisition, we believe that we have taken a strong leadership position in personalized healthcare (PHC). The transaction was valued at US$ 94,5 million in cash, plus up to an additional US$ 35,0 million in contingent consideration. The acquisition date fair value of the total consideration was US$ 112,1 million, which consisted of US$ 94,5 million in cash and US$ 17,6 million for the acquisition date fair value of the contingent consideration. A portion of the purchase consideration was deposited in an escrow account with a paying agent to cover any claims for breach of representations, warranties, covenants or indemnities or failure to satisfy certain conditions. As a result, as of December 31, 2011, US$ 4,8 million (US$ 8,7 million as of December 31, 2010) is included in prepaid expenses and other in the accompanying consolidated statement of financial position. Correspondingly, we have recorded preacquisition contingencies of US$ 4,8 million (US$ 8,7 million as of December 31, 2010) which are included in accrued and other liabilities in the accompanying consolidated statement of financial position.

The contingent consideration of up to US$ 35,0 million relates to specific commercial and other milestones, which, if met, will be paid. The preliminary total fair value of milestones was approximately US$ 17,6 million which, as of the acquisition date, has been recognized as purchase price. The fair value of the milestone payments was determined using a discount rate of 3.25% and a probability regarding the accomplishment of the milestones of 90 to 95%. Refer to Note 29 of the Consolidated Financial Statements, “Fair Value Measurements”, for additional information on the fair market valuation of the contingent consideration. As of December 31, 2011 and 2010, US$ 11,2 million and US$ 14,3 million was accrued respectively, and US$ 6,3 million and US$ 4,1 million was paid, respectively.

SABiosciences Acquisition

On December 14, 2009, we acquired 100% of the outstanding shares of SABiosciences Corporation, located in Frederick, Maryland (USA). SABiosciences holds a leading position in the design and commercialization of disease- and pathway-focused real-time PCR-based assay panels, which are widely utilized in biomedical research and in the development of future drugs and diagnostics. At closing, the purchase price was US$ 97,6 million in cash. As of December 31, 2010, we have US$ 5,9 million of the consideration in an escrow account with a paying agent to cover any claims for breach of representations, warranties, covenants or indemnities or failure to satisfy certain conditions. This amount is included in prepaid expenses and other current assets in the accompanying consolidated statement of financial position. Correspondingly, we have preacquisition contingencies of US$ 5,9 million which are included in other current liabilities in the accompanying consolidated statement of financial position. As of December 31, 2011, the full amount of the escrow has been released along with the preacquisition contingencies.

Consolidated Financial Statements | NOTES | F - 30

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QIAGEN N.V.

The Company’s acquisitions have historically been made at prices above the fair value of the acquired assets, resulting in goodwill, due to expectations of synergies of combining the businesses. These synergies include use of the Company’s existing infrastructure, such as sales force, distribution channels and customer relations, to expand sales of the acquired businesses’ products; use of the infrastructure of the acquired businesses to cost-effectively expand sales of Company products; and elimination of duplicative facilities, functions and staffing.

As of December 31, 2010, the final allocation of the purchase price and transaction costs for the acquisitions of DxS and SABiosciences are follows:

(in US$ thousands) |  | Total |  |  | SABiosciences |  |  | DxS Ltd. |
Cash consideration |  |  | 192.409 |  |  |  | 97.586 |  |  |  | 94.823 |
Fair value of milestones |  |  | 17.599 |  |  |  | 0 |  |  |  | 17.599 |
Purchase Price |  |  | 210.008 |  |  |  | 97.586 |  |  |  | 112.422 |
Working capital |  |  | 10.766 |  |  |  | 10.503 |  |  |  | 263 |
Fixed and other non-current assets |  |  | 4.414 |  |  |  | 2.215 |  |  |  | 2.199 |
Product technology and know how |  |  | 42.800 |  |  |  | 26.400 |  |  |  | 16.400 |
In-process R&D |  |  | 3.100 |  |  |  | 1.700 |  |  |  | 1.400 |
Customer relationship |  |  | 63.300 |  |  |  | 8.400 |  |  |  | 54.900 |
Tradenames |  |  | 6.000 |  |  |  | 1.900 |  |  |  | 4.100 |
Goodwill |  |  | 117.850 |  |  |  | 62.433 |  |  |  | 55.417 |
Deferred tax liability |  |  | (37.487 | ) |  |  | (15.965 | ) |  |  | (21.522 | )
Liabilities assumed |  |  | (735 | ) |  |  | 0 |  |  |  | (735 | )
Final allocation |  |  | 210.008 |  |  |  | 97.586 |  |  |  | 112.422 |

11. | Government Grants

The Company has received cost grants and investment grants. In 2011 the Company recorded income from Government grants in the amount of US$ 3,3 million (2010: US$ 2,7 million). As of December 31, 2011, liabilities in the amount of US$ 2,9 million (2010: US$ 3,2 million) are recorded with respect to grants which have been received but for which not all conditions have been met.

12. | General and Administrative, Integration and Other Expense

In 2011, costs for businesses acquired and restructurings of US$ 141,3 million (2010: US$ 19,5 million) are included in general and administrative expense.

Consolidated Financial Statements | NOTES | F - 31

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QIAGEN N.V.

13. | Personnel Costs

Personnel costs amounted to US$ 347,4 million in 2011 (2010: US$ 333,9 million). As of December 31, 2011, there were 3.938 employees within the Group (2010: 3.587).

(in US$ thousands) |  | 2011 |  |  | 2010 |
Salaries and wages |  |  | 234.961 |  |  |  | 221.465 |
Social security |  |  | 41.961 |  |  |  | 36.972 |
Other |  |  | 70.438 |  |  |  | 75.419 |
Personnel Costs |  |  | 347.360 |  |  |  | 333.856 |

The personnel costs are allocated to the functional areas in which the respective employees are working. Other personnel costs among other positions contain share-based compensation. Please also refer to Note 33. ‘Employee Benefits’ for further details on pension costs and other contributions.

14. | Other Financial Income

In 2010 and 2011, other financial income includes additional proceeds from selling an investment in a privately-held company in 2010 of US$ 0,6 million and US$ 0,6 million, respectively.

15. | Income Tax

Major components of income tax expense as presented in the income statement for the years ended December 31, 2011 and 2010, are:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Current Income Tax |  |  | 30.264 |  |  |  | 48.908 |
Current income tax charge |  |  | 28.981 |  |  |  | 47.858 |
Adjustment in respect of current income tax of previous years |  |  | 1.283 |  |  |  | 1.050 |
Deferred Income Tax |  |  | (59.463 | ) |  |  | (24.343 | )
Relating to origination and reversal of temporary differences |  |  | (55.942 | ) |  |  | (22.943 | )
Relating to changes in tax rates |  |  | (3.521 | ) |  |  | (1.400 | )
Total Income Tax |  |  | (29.199 | ) |  |  | 24.565 |

Deferred tax related to items charged or credited directly to equity during the year and shown in the statement of comprehensive income comprises:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Net (loss) / gain on revaluation of cash flow hedges |  |  | (574 | ) |  |  | (2.079 | )
Net (loss) / gain on foreign currency translation differences |  |  | (546 | ) |  |  | 134 |
Total Income Tax in Statement of Comprehensive Income |  |  | (1.120 | ) |  |  | (1.945 | )

The applicable statutory income tax rate in The Netherlands was 25,0% in 2011 and 25,5% in 2010. A reconciliation of income tax expense applicable to accounting profit before income tax at the statutory income tax rate to income tax expense at the Group’s effective income tax rate for the years ended December 31, 2011 and 2010 is as follows:

Consolidated Financial Statements | NOTES | F - 32

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QIAGEN N.V.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Income before Tax |  |  | 12.853 |  |  |  | 166.562 |
At Dutch statutory income tax rate of 25,0% |  |  | 6.806 |  |  |  | 42.473 |
Effect of tax rate differences |  |  | (2.565 | ) |  |  | 10.897 |
Income taxes related to prior years |  |  | (3.835 | ) |  |  | 1.050 |
Changes in tax rates impacting deferred taxes |  |  | (3.521 | ) |  |  | (1.400 | )
Income tax impact from permanent differences |  |  | (17.392 | ) |  |  | (26.549 | )
Income tax impact related to Stock Option Plan |  |  | (5.574 | ) |  |  | 0 |
Other |  |  | (3.118 | ) |  |  | (1.906 | )
Total Income Tax |  |  | (29.199 | ) |  |  | 24.565 |

We conduct business globally and, as a result, file numerous consolidated and separate income tax returns in the Netherlands, Germany, Switzerland and the U.S. federal jurisdiction, as well as in various other state and foreign jurisdictions. In the normal course of business, we are subject to examination by taxing authorities throughout the world. Our tax years since 2000 are open for income tax examinations by tax authorities. Our subsidiaries, with few exceptions, are no longer subject to income tax examinations by tax authorities for years before 2007. The U.S. consolidated group is subject to federal and most state income tax examinations by tax authorities beginning the year ending December 31, 2007 through the current period.

During 2011, the tax authorities audited the income tax returns of our German subsidiaries for the tax years 2006 through 2009. The outcome of the audit resulted in a current tax liability of US$ 5,3 million primarily related to the timing of certain deductions. As such, a deferred tax asset and deferred tax benefit was recorded that substantially offset the current year liability and expense. As a result of the audit, the Company released US$ 2,3 million of tax reserves through income tax expense.

Consolidated Financial Statements | NOTES | F - 33

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QIAGEN N.V.

The components of the net deferred tax liability at December 31, 2011 and December 31, 2010 are as follows:

(in US$ thousands) |  | Dec. 31, 2011 |  |  | Dec. 31, 2010 |  |  | Change |
Accrued liabilities |  |  | 25.981 |  |  |  | 30.138 |  |  |  | (4.157 | )
Equity awards |  |  | 25.339 |  |  |  | 28.181 |  |  |  | (2.842 | )
Inventories |  |  | 20.563 |  |  |  | 11.599 |  |  |  | 8.964 |
Tax credits |  |  | 6.848 |  |  |  | 9.067 |  |  |  | (2.219 | )
NOL carry forward |  |  | 10.389 |  |  |  | 8.282 |  |  |  | 2.107 |
Currency revaluation |  |  | 1.846 |  |  |  | 2.303 |  |  |  | (457 | )
Intangibles |  |  | 2.523 |  |  |  | 1.228 |  |  |  | 1.295 |
Allowance for bad debts |  |  | 726 |  |  |  | 744 |  |  |  | (18 | )
Depreciation and amortization |  |  | 124 |  |  |  | 51 |  |  |  | 73 |
Other |  |  | 2.395 |  |  |  | 7.505 |  |  |  | (5.110 | )
Offsetting |  |  | (2.607 | ) |  |  | 0 |  |  |  | (2.607 | )
Deferred Tax Asset |  |  | 94.127 |  |  |  | 99.098 |  |  |  | (4.971 | )
Intangibles |  |  | (233.083 | ) |  |  | (240.600 | ) |  |  | 7.517 |
Bifurcation of convertible debt |  |  | (4.296 | ) |  |  | (8.275 | ) |  |  | 3.979 |
Depreciation and amortization |  |  | (19.854 | ) |  |  | (7.757 | ) |  |  | (12.097 | )
Accrued liabilities |  |  | (65 | ) |  |  | (6.487 | ) |  |  | 6.422 |
Currency revaluation |  |  | 0 |  |  |  | (3.588 | ) |  |  | 3.588 |
Inventories |  |  | (1.578 | ) |  |  | (1.915 | ) |  |  | 337 |
Finance lease |  |  | 0 |  |  |  | (1.515 | ) |  |  | 1.515 |
Unremitted profits earnings |  |  | 0 |  |  |  | (1.042 | ) |  |  | 1.042 |
Allowance for bad debts |  |  | (471 | ) |  |  | (473 | ) |  |  | 2 |
Other |  |  | (2.546 | ) |  |  | (1.906 | ) |  |  | (640 | )
Offsetting |  |  | 2.607 |  |  |  | 0 |  |  |  | 2.607 |
Deferred Tax (Liability) |  |  | (259.286 | ) |  |  | (273.558 | ) |  |  | 14.272 |
Net Deferred Tax Asset/ (Liability) |  |  | (165.159 | ) |  |  | (174.460 | ) |  |  | 9.301 |

The movement in deferred income tax assets and liabilities during the year is as follows:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Change in deferred income tax provision |  |  | 7.188 |  |  |  | 4.468 |
Reclassification of deferred tax assets |  |  | (5.627 | ) |  |  | 1.462 |
Change booked through equity |  |  | 7.740 |  |  |  | 9.377 |
Change in Deferred Tax |  |  | 9.301 |  |  |  | 15.307 |

Consolidated Financial Statements | NOTES | F - 34

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QIAGEN N.V.

We have recorded net deferred tax liabilities of US$ 165,2 million and US$ 174,5 million at December 31, 2011 and 2010, respectively which are reflected on the consolidated statement of financial position at December 31, 2011 and 2010 as follows:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Deferred tax assets to be recovered after more than 12 months |  |  | 44.916 |  |  |  | 61.635 |
Deferred tax assets to be recovered within 12 months |  |  | 49.211 |  |  |  | 37.463 |
Deferred Tax Assets |  |  | 94.127 |  |  |  | 99.098 |
Deferred tax liabilities to be recovered after more than 12 months |  |  | (219.097 | ) |  |  | (217.177 | )
Deferred tax liabilities to be recovered within 12 months |  |  | (40.189 | ) |  |  | (56.381 | )
Deferred Tax Liabilities |  |  | (259.286 | ) |  |  | (273.558 | )
Net Deferred Tax Liabilities |  |  | (165.159 | ) |  |  | (174.460 | )

At December 31, 2011 and December 31, 2010 we had US$ 39,4 million and US$ 57,6 million in total foreign net operating losses. At December 31, 2011 and December 31, 2010 we had US$ 5,1 million and US$ 23,5 million of U.S. federal net operating loss (NOL) carryforwards. At December 31, 2011, the entire NOLs in the U.S. are subject to limitations under Section 382 of the Internal Revenue Code but all losses subject to IRC 382 limitation are expected to be utilized before they expire. The net operating losses in the U.S. will expire beginning December 31, 2021 through December 31, 2027. As of December 31, 2011 and December 31, 2010, we had other foreign NOL carryforwards totaling approximately US$ 34,3 million and US$ 34,1 million, respectively. These NOLs were primarily generated from acquisitions and operating losses from our subsidiaries. A portion of the foreign net operating losses will be expiring beginning December 31, 2012. The unrecognized NOLs amount for the years ended December 31, 2011 and 2010 are US$ 4,3 million and US$ 5,4 million, respectively. We had a decrease of US$ 1,1 million in 2011 largely due to the release of the valuation allowance on assets that were used to offset current tax liability. In 2010, the company had a decrease of valuation allowance of US$ 10,2 million whereby the tax effects were eliminated by the assets that were no longer available for future use as a result of intercompany sale of assets.

As of December 31, 2011, residual Netherlands income taxes have not been provided on the undistributed earnings of the majority of our foreign subsidiaries as these earnings are considered to be either permanently reinvested or can be repatriated tax free. For certain entities where we have not asserted permanent reinvestment, we have recorded deferred income taxes or withholding taxes at December 31, 2011 and December 31, 2010, of approximately US$ 1,2 million and US$ 1,0 million, respectively.

There are no income tax consequences regarding payment of dividends to our shareholders. To date, we have never paid dividends.

16. | Cash and Cash Equivalents

(in US$ thousands) |  | 2011 |  |  | 2010 |
Cash at bank and on hand |  |  | 139.103 |  |  |  | 197.154 |
Short-term bank deposits |  |  | 82.495 |  |  |  | 633.200 |
Cash and Cash Equivalents |  |  | 221.598 |  |  |  | 830.354 |

Short-term bank deposits have a maturity of three months or less. All funds are placed with banks with a high credit rating.

Consolidated Financial Statements | NOTES | F - 35

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QIAGEN N.V.

17. | Available-for-sale Financial Instruments

(in US$ thousands) |  | 2011 |  |  | 2010 |
Unquoted equity securities |  |  | 6.802 |  |  |  | 3.359 |
Unquoted debt securities |  |  | 45.287 |  |  |  | 36.077 |
Term deposits and short-term funds |  |  | 9.290 |  |  |  | 70.000 |
Available-for-sale Financial Instruments |  |  | 61.379 |  |  |  | 109.436 |
thereof current Afs financial instruments |  |  | 54.577 |  |  |  | 106.077 |
thereof non-current Afs financial instruments |  |  | 6.802 |  |  |  | 3.359 |

At December 31, 2011, the Company holds investments of US$ 6,8 million for two non-controlling interests in privately-held companies which are classified as non-current available-for-sale equity securities (2010: US$ 3,4 million). The investments are accounted for under the cost-method.

Investments in unquoted equity instruments are measured at cost as their fair values cannot be measured reliably due to the lack of reliable information needed for the determination of the fair values. However, it is estimated that the carrying amounts of these investment approximate their fair values.

At December 31, 2011, we had EUR 35,0 million (US$ 45,3 million as of December 31, 2011) of loan note receivables due from financial institutions. These loan receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market and are carried at fair market value, which is equal to the cost. These loans consist of US$ 25,9 million which finally matures in November 2013, and US$ 19,4 million which finally matures in October 2013 with put option rights on a quarterly basis. Interest income is determined using the effective interest rate method. These loans are classified as current assets in the accompanying consolidated statement of financial position since we may put the loans at our discretion.

At December 31, 2011, we also had EUR 7,2 million (US$ 9,3 million) in term deposits with final maturities between July 2012 and December 2014. The deposits can be withdrawn at the end of each quarter without penalty.

At December 31, 2010, short-term investments consisted of US$ 70,0 million of investments in short-term funds that have a fixed maturity date. Thereof US$ 50,0 million matured in January 2011 and US$ 20,0 million matured in May 2011. These fund investments are carried at fair market value, which is equal to the cost. Additionally, we had EUR 27,0 million (US$ 36,1 million as of December 31, 2010) of loan note receivables due from financial institutions. These loan receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. These loans consist of US$ 9,4 million which matured in February 2011, and US$ 26,7 million which matures in November 2013 with put option rights on a quarterly basis beginning in February 2011. Interest income is determined using the effective interest rate method. These loans are classified as current assets in the accompanying consolidated statement of financial position since we may put the loans at our discretion.

For the year ended December 31, 2011 and 2010, proceeds from sales of short term investments totaled US$ 242,6 million and US$ 44,0 million, respectively. There were no realized gains or losses during 2011 or 2010.

Consolidated Financial Statements | NOTES | F - 36

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Movements in available-for-sale financial assets were as follows:

(in US$ thousands) |  | 2011 |  |  | 2010 |
January, 1st |  |  | 109.436 |  |  |  | 40.000 |
Unquoted equity securities acquired during the year |  |  | 3.443 |  |  |  | 3.359 |
Unquoted debt securities acquired during the year |  |  | 186.817 |  |  |  | 110.077 |
Disposals of unquoted debt securities during the year |  |  | (242.630 | ) |  |  | (44.000 | )
Other |  |  | 4.313 |  |  |  | 0 |
December 31st |  |  | 61.379 |  |  |  | 109.436 |

In connection with the acquisition of Ipsogen SA we have recognized US$ 4,3 million of marketable securities (short-term funds).

18. | Trade Accounts Receivable

(in US$ thousands) |  | 2011 |  |  | 2010 |
Trade accounts receivable |  |  | 225.541 |  |  |  | 193.090 |
Provision for doubtful accounts |  |  | (4.315 | ) |  |  | (3.227 | )
Notes receivable |  |  | 9.544 |  |  |  | 7.555 |
Trade Accounts Receivable |  |  | 230.770 |  |  |  | 197.418 |

The Group sells its products worldwide through sales subsidiaries and distributors. There is no concentration of credit risk with respect to trade accounts receivable as the Group has a large number of internationally dispersed customers. Trade accounts receivable are non-interest bearing and mostly have payment terms of 30-90 days.

The following table provides a breakdown of trade accounts receivable which are neither past due nor impaired and which are past due but not impaired:

(in US$ thousands) |  | Carrying amount |  |  | Thereof neither past due nor impaired |  |  | Less than 30 days |  |  | Between 31 to 60 days |  |  | Between 61 to 90 days |  |  | More than 90 days |
December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade accounts receivable |  |  | 221.226 |  |  |  | 119.332 |  |  |  | 50.232 |  |  |  | 15.445 |  |  |  | 11.997 |  |  |  | 24.220 |
December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade accounts receivable |  |  | 189.863 |  |  |  | 111.183 |  |  |  | 38.687 |  |  |  | 13.713 |  |  |  | 11.192 |  |  |  | 15.088 |

With respect to the trade accounts receivable that are neither impaired nor past due, there are no indications during the reporting periods 2011 and 2010 that the debtors will not meet their payment obligations.

The notes receivable represent a written promise from customers to pay definite amounts of money on specific future dates.

Consolidated Financial Statements | NOTES | F - 37

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QIAGEN N.V.

The following table shows the development of allowances on trade accounts receivable:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Provision for doubtful accounts as at January, 1st |  |  | 3.227 |  |  |  | 3.402 |
Additions (recognized as expense) |  |  | 2.131 |  |  |  | 1.444 |
Write-offs |  |  | (593 | ) |  |  | (771 | )
Currency translation adjustments |  |  | (450 | ) |  |  | (848 | )
Provision for doubtful accounts as at December 31st |  |  | 4.315 |  |  |  | 3.227 |

All additions and write-offs relate to allowances for individual impairments.

19. | Inventories

(in US$ thousands) |  | 2011 |  |  | 2010 |
Raw materials |  |  | 26.645 |  |  |  | 23.738 |
Work in process |  |  | 33.757 |  |  |  | 33.043 |
Finished goods |  |  | 71.834 |  |  |  | 69.852 |
Inventories |  |  | 132.236 |  |  |  | 126.633 |

Included in inventories as of December 31, 2011, are US$ 12,1 million (2010: US$ 13,9 million) of inventory provisions. The movement in inventory provisions was recorded under cost of sales. During 2011 inventories in the amount of US$ 126,4 million have been recognized as cost of sales (2010: US$ 130,8 million).

20. | Prepaid Expenses and Other Current Assets

(in US$ thousands) |  | 2011 |  |  | 2010 |
Prepaid expenses |  |  | 17.841 |  |  |  | 16.772 |
Value added tax |  |  | 9.909 |  |  |  | 7.039 |
Escrow in connection with acquisitions |  |  | 7.026 |  |  |  | 27.006 |
Fair values of derivative financial instruments |  |  | 6.147 |  |  |  | 677 |
Grant receivables |  |  | 1.429 |  |  |  | 751 |
Current lease receivables |  |  | 374 |  |  |  | 691 |
Prepaid Expenses and Other Current Assets |  |  | 42.726 |  |  |  | 52.936 |

Please refer to Note 29. ‘Fair Value Measurements’ for additional information on fair values of derivative financial instruments.

Consolidated Financial Statements | NOTES | F - 38

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21. | Property, Plant and Equipment

Cost

|  | Land and buildings |  |  | Machinery and equipment |  |  | Furniture and office equipment |  |  | Leasehold improvements |  |  | Construction in progress |  |  | Total |
Jan. 1, 2010 |  |  | 228.968 |  |  |  | 142.407 |  |  |  | 70.674 |  |  |  | 24.620 |  |  |  | 16.999 |  |  |  | 483.668 |
Currency adjustments |  |  | (10.378 | ) |  |  | (3.457 | ) |  |  | (2.035 | ) |  |  | 437 |  |  |  | (926 | ) |  |  | (16.359 | )
Additions |  |  | 1.352 |  |  |  | 13.717 |  |  |  | 4.308 |  |  |  | 2.631 |  |  |  | 53.884 |  |  |  | 75.892 |
Business combinations |  |  | 0 |  |  |  | 209 |  |  |  | 84 |  |  |  | 145 |  |  |  | 0 |  |  |  | 438 |
Disposals |  |  | 0 |  |  |  | (4.136 | ) |  |  | (3.120 | ) |  |  | (901 | ) |  |  | (168 | ) |  |  | (8.325 | )
Transfers |  |  | (2 | ) |  |  | 9.254 |  |  |  | 5.118 |  |  |  | 2.123 |  |  |  | (10.412 | ) |  |  | 6.081 |
Dec. 31, 2010 |  |  | 219.940 |  |  |  | 157.994 |  |  |  | 75.029 |  |  |  | 29.055 |  |  |  | 59.377 |  |  |  | 541.395 |
Currency adjustments |  |  | (4.196 | ) |  |  | (3.578 | ) |  |  | (1.278 | ) |  |  | (359 | ) |  |  | (1.483 | ) |  |  | (10.894 | )
Additions |  |  | 12.674 |  |  |  | 15.333 |  |  |  | 6.019 |  |  |  | 1.750 |  |  |  | 41.914 |  |  |  | 77.690 |
Business combinations |  |  | 0 |  |  |  | 2.753 |  |  |  | 1.423 |  |  |  | 1.387 |  |  |  | 0 |  |  |  | 5.563 |
Disposals |  |  | 0 |  |  |  | (76 | ) |  |  | (9.222 | ) |  |  | (344 | ) |  |  | 2.666 |  |  |  | (6.976 | )
Transfers |  |  | 28.868 |  |  |  | 4.375 |  |  |  | 4.975 |  |  |  | 2.454 |  |  |  | (50.688 | ) |  |  | (10.016 | )
Dec. 31, 2011 |  |  | 257.286 |  |  |  | 176.801 |  |  |  | 76.946 |  |  |  | 33.943 |  |  |  | 51.786 |  |  |  | 596.762 |

Depreciation

|  | Land and buildings |  |  | Machinery and equipment |  |  | Furniture and office equipment |  |  | Leasehold improvements |  |  | Construction in progress |  |  | Total |
Jan. 1, 2010 |  |  | (47.200 | ) |  |  | (80.403 | ) |  |  | (45.759 | ) |  |  | (16.762 | ) |  |  | 0 |  |  |  | (190.124 | )
Currency adjustments |  |  | 2.083 |  |  |  | 1.436 |  |  |  | 1.341 |  |  |  | (538 | ) |  |  | 0 |  |  |  | 4.322 |
Additions |  |  | (8.320 | ) |  |  | (22.502 | ) |  |  | (7.000 | ) |  |  | (2.871 | ) |  |  | 0 |  |  |  | (40.693 | )
Disposals |  |  | 38 |  |  |  | 5.956 |  |  |  | 2.244 |  |  |  | 839 |  |  |  | 0 |  |  |  | 9.077 |
Transfers |  |  | 0 |  |  |  | (479 | ) |  |  | 443 |  |  |  | 0 |  |  |  | 0 |  |  |  | (36 | )
Dec. 31, 2010 |  |  | (53.399 | ) |  |  | (95.992 | ) |  |  | (48.731 | ) |  |  | (19.332 | ) |  |  | 0 |  |  |  | (217.454 | )
Currency adjustments |  |  | 1.281 |  |  |  | 2.941 |  |  |  | 1.183 |  |  |  | 373 |  |  |  | 0 |  |  |  | 5.778 |
Additions |  |  | (9.223 | ) |  |  | (26.762 | ) |  |  | (9.802 | ) |  |  | (3.193 | ) |  |  | 0 |  |  |  | (48.980 | )
Disposals |  |  | 0 |  |  |  | 4.840 |  |  |  | 4.085 |  |  |  | 103 |  |  |  | 0 |  |  |  | 9.028 |
Transfers |  |  | (24 | ) |  |  | 378 |  |  |  | (332 | ) |  |  | 14 |  |  |  | 0 |  |  |  | 36 |
Dec. 31, 2011 |  |  | (61.365 | ) |  |  | (114.595 | ) |  |  | (53.597 | ) |  |  | (22.035 | ) |  |  | 0 |  |  |  | (251.592 | )
Net book value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dec. 31, 2010 |  |  | 166.541 |  |  |  | 62.002 |  |  |  | 26.298 |  |  |  | 9.723 |  |  |  | 59.377 |  |  |  | 323.941 |
Dec. 31, 2011 |  |  | 195.921 |  |  |  | 62.206 |  |  |  | 23.349 |  |  |  | 11.908 |  |  |  | 51.786 |  |  |  | 345.170 |

Consolidated Financial Statements | NOTES | F - 39

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QIAGEN N.V.

No property, plant and equipment were pledged as security against non-current financial debts at December 31, 2011 and 2010. The net carrying amount of property, plant and equipment under finance lease contracts amounts to US$ 6,2 million as of December 31, 2011 (2010: US$ 7,2 million).

The asset’s residual values, useful lives and methods of depreciation are reviewed, and adjusted if appropriate, at each financial year end.

For the year ended December 31, 2011, construction in progress includes amounts related to the construction of new facilities in Germany and the United States. For the years ended December 31, 2011 and 2010, interest capitalized in connection with construction projects was not significant.

22. | Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2011 and 2010, are as follows:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Goodwill as at January, 1st |  |  | 1.365.156 |  |  |  | 1.349.916 |
Goodwill acquired during the year |  |  | 402.575 |  |  |  | 0 |
Earn-out and milestones payments |  |  | 1.122 |  |  |  | 2.983 |
Purchase adjustments |  |  | 615 |  |  |  | 579 |
Currency adjustments |  |  | (22.695 | ) |  |  | 11.678 |
Goodwill as at December 31st |  |  | 1.746.773 |  |  |  | 1.365.156 |

With respect to additions to goodwill reference is made to 10. ‘Acquisitions’. In 2011 adjustments primarily reflect adjustments for earn-out payments and currency adjustments.

In the fourth quarter of 2011, we performed our annual impairment assessment of goodwill (using data as of October 1, 2011) in accordance with the provisions of IAS 36. No events or changes in circumstances indicated that the acquired goodwill might be impaired.

Management monitors and makes decisions regarding the Company’s operations on a functional specific and global level. Therefore, we concluded that the goodwill impairment test needs to be performed on the level of the consolidated Group as a whole (one cash generating unit). In testing for potential impairment, we measured the estimated fair value of the cash generating unit based upon discounted future operating cash flows using a discount rate reflecting our estimated average cost of funds.

For impairment testing, the recoverable amount of goodwill allocated to the cash generating unit (higher of the cash generating unit’s fair value less selling costs and its value in use) is compared to the carrying amount of the net assets employed (including goodwill) of the cash generating unit. Value in use is normally assumed to be higher than the fair value less selling costs; therefore, fair value less selling costs is only investigated when value in use is lower than the carrying amount of the cash generating unit.

Key assumptions used in the value in use calculations

The value in use is calculated based on estimated future cash flow projections expected to result from the use of the cash generating unit, discounted using an appropriate long-term pre-tax discount rate. The value in use calculations use cash flow projections based on financial budgets and models over the projection period (six years) as available

Consolidated Financial Statements | NOTES | F - 40

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QIAGEN N.V.

for internal reporting purposes and in accordance with standard valuation practices. The growth rates used are based on industry growth forecasts for the projected period as well as for the subsequent period (long-term growth rate of 3%). The discount rates used are based on the weighted average cost of capital (2011: 8,40%; 2010: 8,00%) as calculated using the Black Scholes valuation model and verified by external analyst reports.

Sensitivity to changes in assumptions

Changes in assumptions used in projecting future operating cash flows and cost of funds could have a significant impact on the determination of impairment amounts. In estimating future cash flows, we used our internal budgets. Our budgets were based on recent sales data for existing products, planned timing of new product launches or capital projects, and customer commitments related to new and existing products. These budgets also included assumptions of future production volumes and pricing. The calculation of value in use is most sensitive to discount rates and growth rates used.

Discount rates reflect management’s estimate of the risks profile for the respective valuation object. The growth rates used are based on industry growth forecasts for the projected period as well as for the subsequent period.

We concluded that no impairment existed. Even if our estimates of projected future cash flows were too high by 10%, there would be no impact on the reported value of goodwill at December 31, 2011. Due to the numerous variables associated with our judgments and assumptions relating to the valuation of the cash generating unit and the effects of changes in circumstances affecting these valuations, both the precision and reliability of the resulting estimates are subject to uncertainty, and as additional information becomes known, we may change our estimates.

23. | Other Intangible Assets

Cost

|  | Technology rights and patents |  |  | Software licenses |  |  | Development expense |  |  | Other intellectual properties |  |  | Total |
Jan. 1, 2010 |  |  | 710.400 |  |  |  | 53.044 |  |  |  | 130.791 |  |  |  | 261.627 |  |  |  | 1.155.862 |
Currency adjustments |  |  | (5.722 | ) |  |  | (1.903 | ) |  |  | (5.811 | ) |  |  | (1.828 | ) |  |  | (15.264 | )
Additions |  |  | 69.607 |  |  |  | 3.859 |  |  |  | 19.376 |  |  |  | 2.796 |  |  |  | 95.638 |
Business combinations |  |  | 21.394 |  |  |  | 23 |  |  |  | 0 |  |  |  | 9.938 |  |  |  | 31.355 |
Disposals |  |  | (1.651 | ) |  |  | (473 | ) |  |  | 0 |  |  |  | (907 | ) |  |  | (3.031 | )
Transfers |  |  | 0 |  |  |  | (601 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (601 | )
Dec. 31, 2010 |  |  | 794.028 |  |  |  | 53.949 |  |  |  | 144.356 |  |  |  | 271.626 |  |  |  | 1.263.959 |
Currency adjustments |  |  | (6.671 | ) |  |  | (1.061 | ) |  |  | (1.735 | ) |  |  | (1.957 | ) |  |  | (11.424 | )
Additions |  |  | 46.260 |  |  |  | 6.043 |  |  |  | 16.641 |  |  |  | 10.702 |  |  |  | 79.646 |
Business combinations |  |  | 98.243 |  |  |  | 350 |  |  |  | 0 |  |  |  | 62.852 |  |  |  | 161.445 |
Disposals |  |  | (32.687 | ) |  |  | (3.952 | ) |  |  | 0 |  |  |  | (5.480 | ) |  |  | (42.119 | )
Transfers |  |  | 3.349 |  |  |  | 10.016 |  |  |  | 0 |  |  |  | (3.349 | ) |  |  | 10.016 |
Dec. 31, 2011 |  |  | 902.522 |  |  |  | 65.345 |  |  |  | 159.262 |  |  |  | 334.394 |  |  |  | 1.461.523 |

Consolidated Financial Statements | NOTES | F - 41

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QIAGEN N.V.

Other Intangible Assets, continued

Amortization

|  | Technology rights and patents |  |  | Software licenses |  |  | Development expense |  |  | Other intellectual properties |  |  | Total |
Jan. 1, 2010 |  |  | (177.553 | ) |  |  | (29.121 | ) |  |  | (32.640 | ) |  |  | (42.179 | ) |  |  | (281.493 | )
Currency adjustments |  |  | 1.851 |  |  |  | 581 |  |  |  | (102 | ) |  |  | (619 | ) |  |  | 1.711 |
Additions |  |  | (70.562 | ) |  |  | (4.569 | ) |  |  | (11.307 | ) |  |  | (23.258 | ) |  |  | (109.696 | )
Impairment losses |  |  | 0 |  |  |  | 0 |  |  |  | (1.453 | ) |  |  | 0 |  |  |  | (1.453 | )
Disposals |  |  | (20 | ) |  |  | 846 |  |  |  | 0 |  |  |  | 13 |  |  |  | 839 |
Transfers |  |  | 62 |  |  |  | 36 |  |  |  | 0 |  |  |  | (62 | ) |  |  | 36 |
Dec. 31, 2010 |  |  | (246.222 | ) |  |  | (32.227 | ) |  |  | (45.502 | ) |  |  | (66.105 | ) |  |  | (390.056 | )
Currency adjustments |  |  | 3.716 |  |  |  | 862 |  |  |  | 1.670 |  |  |  | 1.054 |  |  |  | 7.302 |
Additions |  |  | (63.422 | ) |  |  | (7.776 | ) |  |  | (13.537 | ) |  |  | (16.524 | ) |  |  | (101.259 | )
Impairment losses |  |  | (23.266 | ) |  |  | 0 |  |  |  | (56.114 | ) |  |  | (10.266 | ) |  |  | (89.646 | )
Disposals |  |  | 3.606 |  |  |  | 453 |  |  |  | 0 |  |  |  | 0 |  |  |  | 4.059 |
Transfers |  |  | 184 |  |  |  | (36 | ) |  |  | 0 |  |  |  | (184 | ) |  |  | (36 | )
Dec. 31, 2011 |  |  | (325.404 | ) |  |  | (38.724 | ) |  |  | (113.483 | ) |  |  | (92.025 | ) |  |  | (569.636 | )
Net book value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dec. 31, 2010 |  |  | 547.806 |  |  |  | 21.722 |  |  |  | 98.854 |  |  |  | 205.521 |  |  |  | 873.903 |
Dec. 31, 2011 |  |  | 577.118 |  |  |  | 26.621 |  |  |  | 45.779 |  |  |  | 242.369 |  |  |  | 891.887 |

The amortization of intangible assets is allocated to the functional areas in which the respective intangible assets are used (primarily cost of sales, research & development expense and sales and marketing expense). In 2011 purchased intangibles amortization in the amount of US$ 70,2 million is included in cost of sales (2010: US$ 61,8 million) and purchased intangibles amortization in the amount of US$ 29,9 million is included in operating expenses (2010: US$ 26,6 million). In connection with our latest strategic initiative to strengthen our industry leadership we considered impairment charges on capitalized development expenses for projects we will not continue of US$ 48,6 million in 2011 (2010: US$ 1,5 million) and additionally we recorded impairment charges on in-process research and development projects which we have capitalized in the past in connection with the acquisition of the Digene group of US$ 7,5 million (2010: zero) in research and development expense.

The weighted-average amortization period for the intangible assets acquired in the 2011 acquisitions is 10 years.

Consolidated Financial Statements | NOTES | F - 42

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24. | Investments in Associates

We have made strategic investments in certain companies that are accounted for using the equity or cost method of accounting. The method of accounting for an investment depends on the level of influence. We monitor changes in circumstances that may require a reassessment of the level of influence. We periodically review the carrying value of these investments for impairment, considering factors such as the most recent stock transactions and book values from the recent financial statements. The fair value of cost-method investments is estimated when there are identified events or changes in circumstances that may have an impact on the fair value of the investment.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Investments in associates as at January 1st |  |  | 19.640 |  |  |  | 11.299 |
Acquisition of shares |  |  | 15.779 |  |  |  | 3.927 |
Share of profit / (loss) |  |  | 1.874 |  |  |  | 2.907 |
Exchange rate differences |  |  | (1.646 | ) |  |  | 1.507 |
Investments in associates as at December 31st |  |  | 35.647 |  |  |  | 19.640 |

We have a 50% interest in a joint venture company, PreAnalytiX GmbH, for which we are not the primary beneficiary. Thus, the investment is accounted for under the equity method. PreAnalytiX was formed to develop, manufacture and market integrated systems for the collection, stabilization and purification of nucleic acids for molecular diagnostic testing. At present, our maximum exposure to loss as a result of our involvement with PreAnalytiX is limited to our share of losses from the equity method investment itself. For further information on PreAnalytix reference is made to 34. ‘Related Party Transactions’.

During the second quarter of 2011, we paid US$ 9,7 million for a 40% share together with a US$ 6,7 million advance payment towards the potential future acquisition of the remaining 60% of another privately-held company. We hold a call option, exercisable for two months after October 2012 to acquire the remaining 60% of shares. Conversely, the sellers in this transaction hold a put option to sell the remaining 60% of shares to us, exercisable for two months after October 2012. In case neither the put nor the call option is exercised the sellers must repay US$ 6,7 million. The investment is accounted for under the equity-method.

In 2010, the Company made a US$ 4,0 million investment in Pyrobett Pte Ltd., a company located in Singapore which performs research and development activities related to the development of instruments for use in life sciences.

Amounts from Equity-Accounted Investments considered in the financial statements are as follows:

Shareholding |  | 2011 |  |  | 2010 |
PreAnalytix GmbH, Germany |  |  | 50,0 | % |  |  | 50,0 | %
Pyrobett Pte Ltd, Singapore |  |  | 19,0 | % |  |  | 20,0 | %
QBM Cell Science Ltd, Canada |  |  | 19,5 | % |  |  | 19,5 | %
Dx Assays Pte Ltd, Singapore |  |  | 33,3 | % |  |  | 33,3 | %
Scandinavian Gene Synthesis AB |  |  | 40,0 | % |  |  | — |
Peak Service |  |  | 40,0 | % |  |  | — |

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QIAGEN N.V.

As a QIAGEN representative has a board seat at QBM Cell Science, QIAGEN has significant influence on that company. Accordingly, the share in QBM Cell Science is recorded at equity in spite of the fact that QIAGEN’s share is below 20%. The following overview reflects 100% of the assets and liabilities of the relating companies:

(in US$ millions) |  | 2011 |  |  | 2010 |
Total assets |  |  | 52,0 |  |  |  | 45,0 |
Shareholders’ equity |  |  | 43,0 |  |  |  | 29,4 |
Net sales |  |  | 21,0 |  |  |  | 13,5 |
Net result (Group’s share) |  |  | 1,9 |  |  |  | 2,9 |

At December 31, 2011 and 2010, the Company had a loan receivable of US$ 1,5 million and US$ 1,6 million, respectively, included in other non-current assets, due from Dx Assays, which bears interest at 15% and is due in March 2013.

25. | Financial Debts

At December 31, 2011, total long-term debt was approximately US$ 576,6 million, US$ 146,0 million of which is current. We believe that funds from operations, existing cash and cash equivalents, and availability of financing facilities as needed, will be sufficient to fund our debt repayments coming due in 2012.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Term loan |  |  | 142.329 |  |  |  | 425.000 |
Convertible Bond 2006/2026 |  |  | 285.777 |  |  |  | 275.434 |
Convertible Bond 2004/2024 |  |  | 145.797 |  |  |  | 141.744 |
Other loan |  |  | 2.622 |  |  |  | 3.006 |
Total current and non-current financial debts |  |  | 576.525 |  |  |  | 845.184 |
Less: current portion of financial debts |  |  | 145.963 |  |  |  | 77.851 |
Total non-current financial debts |  |  | 430.562 |  |  |  | 767.333 |
Total amount secured |  |  | 0 |  |  |  | 0 |
Unused lines of credit for short-term financing |  |  | 383.800 |  |  |  | 160.800 |

Breakdown by maturities for payments due for nominal amounts and future interest and development of future carrying values as per December 31, 2011, is as follows:

(in US$ thousands) |  | Carrying value |  |  | Loans (fixed and floating-rate) |  |  | Convertible bonds (fixed-rate) |  |  | Total Cash out |
2012 |  |  | 143.947 |  |  |  | 144.237 |  |  |  | 11.925 |  |  |  | 156.162 |
2013 |  |  | 286.262 |  |  |  | 502 |  |  |  | 305.858 |  |  |  | 306.360 |
2014 |  |  | 145.797 |  |  |  | 0 |  |  |  | 146.378 |  |  |  | 146.378 |
2015 |  |  | 519 |  |  |  | 519 |  |  |  | 0 |  |  |  | 519 |
Thereafter |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Total financial debts 2011 |  |  | 576.525 |  |  |  | 145.258 |  |  |  | 464.161 |  |  |  | 609.419 |

Consolidated Financial Statements | NOTES | F - 44

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QIAGEN N.V.

For the year ended December 31, 2010:

(in US$ thousands) |  | Carrying value |  |  | Loans (fixed and floating-rate) |  |  | Convertible Bonds (fixed-rate) |  |  | Total Cash out |
2011 |  |  | 224.646 |  |  |  | 78.234 |  |  |  | 156.128 |  |  |  | 234.362 |
2012 |  |  | 360.396 |  |  |  | 352.959 |  |  |  | 9.750 |  |  |  | 362.709 |
2013 |  |  | 260.142 |  |  |  | 951 |  |  |  | 303.683 |  |  |  | 304.634 |
2014 |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Thereafter |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Total financial debts 2010 |  |  | 845.184 |  |  |  | 432.144 |  |  |  | 469.561 |  |  |  | 901.705 |

Please refer to Note 35.2 ‘Use of Derivative Financial Instruments’ for maturities of derivative financial instruments.

The credit facilities available at December 31, 2011 total EUR 406,6 million (approximately US$ 526,1 million). This includes a EUR 400,0 million syndicated multi-currency revolving credit facility expiring December 2016 of which EUR 110,0 million (approximately US$ 142,3 million) was utilized at December 31, 2011, and four other lines of credit amounting to EUR 6,6 million with no expiration date, none of which were utilized as of December 31, 2011. The EUR 400,0 million facility can be utilized in euro, U.K pound or U.S. dollar and bears interest of 0,8% to 2,65% above three months EURIBOR, or LIBOR in relation to any loan not in euro, and is offered with interest periods of one, two, three, six or twelve months. The commitment fee is calculated based on 35% of the applicable margin. No commitment fees were paid in 2011. The revolving facility agreement contains certain financial and non-financial covenants, including but not limited to, restrictions on the encumbrance of assets and the maintenance of certain financial ratios. We were in compliance with these covenants at December 31, 2011. There was no significant outstanding line of credit or short-term borrowings as of December 31, 2010. The credit facilities are for general corporate purposes.

The carrying amounts of current and non-current financial debts, excluding the convertible bonds, approximate their fair values. The fair values are based on future cash flows using market rates of interests for borrowings with similar credit status and maturities.

Interest expense on non-current debt was US$ 34,8 million for the year ended December 31, 2011 (2010: US$ 37,6 million).

(in US$ thousands) |  | 2011 |  |  | 2010 |
Face value (2004) |  |  | 145.000 |  |  |  | 145.000 |
Transaction costs |  |  | (3.300 | ) |  |  | (3.300 | )
Equity conversion component |  |  | (35.584 | ) |  |  | (35.584 | )
Liability component on initial recognition (2004) |  |  | 106.116 |  |  |  | 106.116 |
Accrued interest expense |  |  | 39.681 |  |  |  | 35.628 |
Convertible Bond 2004/2024 |  |  | 145.797 |  |  |  | 141.744 |

In August 2004, the Company completed the sale of US$ 150,0 million principal amount of 1,50% convertible unsubordinated notes (Notes) due 2024, through its subsidiary QIAGEN Finance (Luxembourg) S.A. Interest on the Notes is payable semi-annually in February and August. The Notes were issued at 100% of principal value, and are

Consolidated Financial Statements | NOTES | F - 45

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QIAGEN N.V.

convertible into 11,5 million shares of common shares at the option of the holder upon the occurrence of certain events at a price of US$ 12,6449 per share, subject to adjustment. In November 2008, the Company issued 395.417 common shares upon the exercise of a portion of the subscription rights in connection with the conversion of US$ 5,0 million of the Notes. The Notes may be redeemed, in whole or in part, at QIAGEN’s option on or after 7 years, at 100% of the principal amount provided the actual trading price of our common stock exceeds 120% of the conversion price for twenty consecutive trading days. In addition, the holders of the Notes may require QIAGEN to repurchase all or a portion of the outstanding Notes for 100% of the principal amount, plus accrued interest, on August 18, 2011, 2014 and 2019. Based on an estimation using available over-the-counter market information on the convertible bond issued by QIAGEN Finance (Luxembourg) S.A., the fair value of the Notes at December 31, 2011, was approximately US$ 167 million (2010: US$ 228,8 million). The effective interest rate of the Notes amounts to 5,20%. The Company has reserved 11,5 million shares of common stock for issuance in the event of conversion.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Face value (2006) |  |  | 300.000 |  |  |  | 300.000 |
Transaction costs |  |  | (4.788 | ) |  |  | (4.788 | )
Equity conversion component |  |  | (60.561 | ) |  |  | (60.561 | )
Liability component on initial recognition (2006) |  |  | 234.651 |  |  |  | 234.651 |
Accrued interest expense |  |  | 51.126 |  |  |  | 40.783 |
Convertible Bond 2006/2026 |  |  | 285.777 |  |  |  | 275.434 |

In May 2006, the Company completed the sale of US$ 300,0 million principal amount of 3,25% senior convertible notes (2006 Notes) due 2026, through its subsidiary QIAGEN Euro Finance (Luxembourg) S.A. Interest on the 2006 Notes is payable semi-annually in May and November. The 2006 Notes were issued at 100% of principal value, and are convertible into 15,0 million shares of common shares at the option of the holder upon the occurrence of certain events at a price of US$ 20,00 per share, subject to adjustment. The 2006 Notes cannot be called for the first 7 years and are callable thereafter subject to a provisional call trigger of 130% of the conversion price. In addition, the holders of the 2006 Notes may require QIAGEN to repurchase all or a portion of the outstanding Notes for 100% of the principal amount, plus accrued interest, on May 16, 2013, 2017 and 2022. Based on an estimation using available over-the-counter market information on the convertible bond issued by QIAGEN Euro Finance (Luxembourg) S.A., the fair value of the Notes at December 31, 2011, was approximately US$ 311,6 million (2010: US$ 365,0 million). The effective interest rate of the Notes amounts to 7,3%. The Company has reserved 15,0 million of common stock for issuance in the event of conversion.

26. | Provisions

Warranty provision

We provide warranties on our products against defects in materials and workmanship generally for a period of one year. A provision for estimated future warranty costs is recorded in cost of sales at the time product revenue is recognized. Product warranty obligations are included in accrued and other liabilities in the accompanying consolidated statement of financial position. The changes in the carrying amount of warranty obligations are as follows:

Consolidated Financial Statements | NOTES | F - 46

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QIAGEN N.V.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Warranty obligation as at January 1st |  |  | 3.440 |  |  |  | 3.468 |
Provision charged to income |  |  | 4.376 |  |  |  | 3.678 |
Usage |  |  | (3.649 | ) |  |  | (3.258 | )
Adjustments to previously provided amounts, net |  |  | (198 | ) |  |  | (477 | )
Currency adjustments |  |  | (59 | ) |  |  | 29 |
Warranty obligation as at December 31st |  |  | 3.910 |  |  |  | 3.440 |

Acquisition related cost

The provision for acquisition and related costs primarily relates to severance and employee related costs as well as to lease and related costs.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Acquisition related costs as at January 1st |  |  | 2.965 |  |  |  | 5.558 |
Provision charged to income |  |  | 3.728 |  |  |  | 2.970 |
Usage |  |  | (5.574 | ) |  |  | (5.053 | )
Currency adjustments |  |  | 34 |  |  |  | (510 | )
Acquisition related costs as at December 31st |  |  | 1.153 |  |  |  | 2.965 |

For all provisions it is expected that the respective amounts will be utilized in the next financial year.

27. | Other Current Liabilities

(in US$ thousands) |  | 2011 |  |  | 2010 |
Payroll and related accrued liabilities |  |  | 44.420 |  |  |  | 42.503 |
Relocation and restructuring costs |  |  | 26.909 |  |  |  | 3.208 |
Royalties |  |  | 25.659 |  |  |  | 16.400 |
Deferred revenue |  |  | 23.793 |  |  |  | 20.973 |
Accrued expenses |  |  | 23.778 |  |  |  | 22.965 |
Accrued earn-out and milestones payments |  |  | 17.470 |  |  |  | 24.808 |
Pre-acquisition contingencies assumed in acquisition |  |  | 6.203 |  |  |  | 28.679 |
Current finance lease obligations |  |  | 4.006 |  |  |  | 3.588 |
Fair values of derivative financial instruments |  |  | 2.492 |  |  |  | 11.685 |
Other liabilities |  |  | 30.752 |  |  |  | 21.723 |
Other current liabilities |  |  | 205.482 |  |  |  | 196.532 |

In November, QIAGEN began implementing a project to enhance productivity and free up resources for reallocation to strategic initiatives to drive growth and innovation. Initial actions focused on eliminating organizational layers, overlapping structures and duplication between global, regional and local activities. As part of this project, R&D

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activities will focus more tightly on high-growth areas in all customer classes. QIAGEN also plans to optimize capacity utilization at selected sites and capture savings from shared service functions. As part of this project, QIAGEN reduced its worldwide workforce by approximately 8-10% at the end of 2011 and in early 2012. Annual pre-tax cost savings of approximately US$ 50 million are expected in 2012, with the majority to be reinvested in strategic initiatives.

In connection with this project we recorded total pretax charges of US$ 131,0 million in the fourth quarter of 2011, of which US$ 5,5 million is recorded in cost of sales, US$ 69,4 million is recorded in general, administrative, integration and other expense, US$ 48,6 is included in research and development expense and US$ 7,5 million is included in purchase intangibles amortization. The pretax charges consist of US$ 20,1 million for workforce reductions and US$ 98,2 million for intangible asset impairment charges which have been recorded against the respective assets. Additionally we incurred contract termination and consulting costs of US$ 12,7 million. At December 31, 2011, a restructuring accrual of US$ 26,9 million was included in other current liabilities.

Revenues for extended warranty services or product maintenance contracts are deferred and recognized on a straight-line basis over the contract period.

Accrued expenses mainly comprise accrued sales tax, professional fees and advance payments from customers.

For additional information on fair values of derivative financial instruments please refer to Note 29.

Other current liabilities have an average term of six months.

28. | Other Non-Current Liabilities

As per end of December 31, 2011, non-current finance lease obligations of US$ 19.495 thousands (2010: US$ 23.354 thousands) are included in other non-current liabilities. Other non-current liabilities include accrued revenue milestones payments as at December 31, 2011 of US$ 22.292 thousands (2010: zero).

29. | Fair Value Measurements

Financial Instruments are measured at fair value according to a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows:

Level 1, Observable inputs, such as quoted prices in active markets;

Level 2, Inputs, other than the quoted price in active markets, that are observable either directly or indirectly; and

Level 3, Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

Our assets and liabilities measured at fair value on a recurring basis consist of short-term investments, which are classified in Level 1 and Level 2 of the fair value hierarchy, derivative contracts used to hedge currency and interest rate risk, which are classified in Level 2 of the fair value hierarchy, and contingent consideration accruals, which are classified in Level 3 of the fair value hierarchy, and are shown in the tables below. In determining fair value for Level 2 instruments, we apply a market approach, using quoted active market prices relevant to the particular instrument under valuation, giving consideration to the credit risk of both the respective counterparty to the contract and the Company. To determine our credit risk we estimated our credit rating by benchmarking the price of outstanding debt to publicly-available comparable data from rated companies. Using the estimated rating, our credit risk was quantified

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by reference to publicly-traded debt with a corresponding rating. We value contingent consideration liabilities using Level 3 unobservable inputs, applying the income approach, such as the discounted cash flow technique, or the probability-weighted scenario method. Contingent consideration arrangements obligate us to pay the sellers of an acquired entity if specified future events occur or conditions are met such as the achievement of technological or revenue milestones. We use various key assumptions, such as the probability of achievement of the milestones and the discount rate, to represent the non-performing risk factors and time value when applying the income approach. We regularly review the fair value of the contingent consideration, and reflect any change in the accrual in the condensed consolidated statement of income in the line items commensurate with the underlying nature of milestone arrangements.

As at December 31, 2011, the Group held the following financial instruments carried at fair value on the statement of financial position:

(in US$ thousands) |  | Dec. 31, 2011 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Available-for-sale financial assets |  |  | 54.577 |  |  |  | 9.290 |  |  |  | 45.287 |  |  |  | 0 |
Foreign exchange contracts, designated |  |  | 658 |  |  |  | 0 |  |  |  | 658 |  |  |  | 0 |
Foreign exchange contracts, undesignated |  |  | 5.489 |  |  |  | 0 |  |  |  | 5.489 |  |  |  | 0 |
Assets |  |  | 60.427 |  |  |  | 9.290 |  |  |  | 51.434 |  |  |  | 0 |
Foreign exchange contracts, designated |  |  | 1.723 |  |  |  | 0 |  |  |  | 1.723 |  |  |  | 0 |
Foreign exchange contracts, undesignated |  |  | 769 |  |  |  | 0 |  |  |  | 769 |  |  |  | 0 |
Contingent consideration |  |  | 38.646 |  |  |  | 0 |  |  |  | 0 |  |  |  | 38.646 |
Liabilities |  |  | 41.138 |  |  |  | 0 |  |  |  | 2.492 |  |  |  | 38.646 |

As at 2010, the Group held the following financial instruments carried at fair value on the statement of financial position:

(in US$ thousands) |  | Dec. 31, 2010 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Available-for-sale financial assets |  |  | 106.077 |  |  |  | 70.000 |  |  |  | 36.077 |  |  |  | 0 |
Foreign exchange contracts, undesignated |  |  | 677 |  |  |  | 0 |  |  |  | 677 |  |  |  | 0 |
Assets |  |  | 106.754 |  |  |  | 70.000 |  |  |  | 36.754 |  |  |  | 0 |
Foreign exchange contracts, designated |  |  | 8.452 |  |  |  | 0 |  |  |  | 8.452 |  |  |  | 0 |
Foreign exchange contracts, undesignated |  |  | 5.113 |  |  |  | 0 |  |  |  | 5.113 |  |  |  | 0 |
Interest rate contracts, designated |  |  | 2.663 |  |  |  | 0 |  |  |  | 2.663 |  |  |  | 0 |
Contingent consideration |  |  | 22.510 |  |  |  | 0 |  |  |  | 0 |  |  |  | 22.510 |
Liabilities |  |  | 38.738 |  |  |  | 0 |  |  |  | 16.228 |  |  |  | 22.510 |

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For liabilities with Level 3 inputs, the following table summarizes the activity as of December 31, 2011:

(in US$ thousands) |  | 2011 |
Beginning balance as at January 1st |  |  | 22.510 |
Additions from acquisitions |  |  | 24.885 |
Payments |  |  | (9.065 | )
Total loss considered in earnings |  |  | 253 |
Currency adjustments |  |  | 63 |
Acquisition related costs as at December 31st |  |  | 38.646 |

30. | Retained Earnings

At the Annual General Meeting of Shareholders on June 30, 2011, the Board of Directors will propose to carry forward the profit for the year of QIAGEN N.V., the holding company of the Group, which is determined in accordance with the legal provisions of the Dutch Civil Code.

31. | Share-Based Payments

The Company adopted the QIAGEN N.V. Amended and Restated 2005 Stock Plan (the Plan) in 2005. The Plan allows for the granting of stock rights and incentive stock options, as well as non-qualified options, stock grants and stock based awards, generally with terms of up to 10 years, subject to earlier termination in certain situations. Generally, options vest over a three-year period. The vesting and exercisability of certain stock rights will be accelerated in the event of a Change of Control, as defined in the Plan. To date all option grants have been at the market value on the grant date or at a premium above the closing market price on the grant date. The Company issues new common shares to satisfy option exercises and had approximately 22,1 million shares of common stock reserved and available for issuance under this plan at December 31, 2011.

In connection with the 2007 acquisition of Digene Corporation the Company assumed three additional equity incentive plans. No new grants will be made under these plans. The Company had approximately 0,1 million common stock reserved and available for issuance under these plans at December 31, 2011.

Stock Options

During the years ended December 31, 2011 and 2010, the Company granted 601.897 and 570.282 stock options, respectively. Following are the weighted-average assumptions used in valuing the stock options granted to employees for the years ended December 31:

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(in US$ thousands) |  | 2011 |  |  | 2010 |
Stock price volatility |  |  | 34,0 | % |  |  | 31,0 | %
Risk-free interest rate |  |  | 1,9 | % |  |  | 2,1 | %
Expected life (in years) |  |  | 5,0 |  |  |  | 4,8 |
Dividend rate |  |  | 0,0 | % |  |  | 0,0 | %
Forfeiture rate |  |  | 6,1 | % |  |  | 7,0 | %

A summary of the status of the Company’s employee stock options as of December 31, 2011 and 2010, and changes during the years then ended is presented below:

(in thousands) |  | Stock Options |  |  | Weighted Average Exercise Price US$ |
Stock Option as at January 1, 2011 |  |  | 7.332 |  |  |  | 13,86 |
Granted |  |  | 602 |  |  |  | 19,86 |
Exercised |  |  | (655 | ) |  |  | 12,95 |
Forfeitured |  |  | (62 | ) |  |  | 19,56 |
Expired |  |  | (690 | ) |  |  | 21,79 |
Outstanding at December 31, 2011 |  |  | 6.527 |  |  |  | 13,61 |
Exercisable at December 31, 2011 |  |  | 5.453 |  |  |  | 12,37 |
Vested and expected to vest at December 31, 2011 |  |  | 6.436 |  |  |  | 13,53 |
Stock Option as at January 1, 2010 |  |  | 8.282 |  |  |  | 14,74 |
Granted |  |  | 570 |  |  |  | 21,27 |
Exercised |  |  | (925 | ) |  |  | 12,47 |
Forfeitured |  |  | (595 | ) |  |  | 35,42 |
Outstanding at December 31, 2010 |  |  | 7.332 |  |  |  | 13,86 |
Exercisable at December 31, 2010 |  |  | 6.351 |  |  |  | 12,93 |

Generally, stock option grants are valued as a single award with a single average expected term and are amortized over the vesting period. The weighted-average grant-date fair value of options granted during the years ended December 31, 2011 and 2010, was US$ 6,49 and US$ 6,42, respectively. The total intrinsic value of options exercised during the years ended December 31, 2011 and 2010 was US$ 3,7 million and US$ 7,7 million, respectively. At December 31, 2011, the unrecognized share-based compensation expense related to employee stock option awards including estimated forfeitures is approximately US$ 4,0 million and will be recognized over a weighted average period of approximately 1,7 years.

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At December 31, 2011 and 2010, options were exercisable with respect to 5,5 million and 6,4 million common shares at a weighted average price of US$ 12,37 and US$ 12,93 per share, respectively. The options outstanding at December 31, 2011 expire in various years through 2021.

Restricted Stock Units

Restricted stock units represent rights to receive common shares at a future date. There is no exercise price and the fair market value at the time of the grant is amortized to expense over the vesting period, generally 10 years. The fair market value is determined based on the number of restricted stock units granted and the market value of the Company’s shares on the grant date. Pre-vesting forfeitures were estimated to be approximately 7,7% (2010: 7,3%). At December 31, 2011, there was US$ 61,1 million remaining in unrecognized compensation cost related to these awards, which is expected to be recognized over a weighted average period of 2,9 years (2010: US$ 51,8 million over a weighted average period of 8,2 years). The weighted average grant date fair value of restricted stock units granted during the year ended December 31, 2011, was US$ 19,82 (2010: US$ 21,15). The total fair value of restricted stock units released during the years ended December 31, 2011 and 2010, was US$ 8,8 million and US$ 2,5 million, respectively.

A summary of the Company’s restricted stock units (RSU’s) as of December 31, 2011 and 2010, and changes during the year then ended are presented below:

(in thousands) |  | 2011 |  |  | 2010 |
RSU as at January, 1st |  |  | 4.417 |  |  |  | 3.039 |
Granted |  |  | 1.929 |  |  |  | 1.648 |
Released |  |  | (451 | ) |  |  | (116 | )
Forfeitured |  |  | (244 | ) |  |  | (154 | )
Outstanding at December 31st |  |  | 5.651 |  |  |  | 4.417 |
Vested and expected to vest at December 31st |  |  | 4.597 |  |  |  | 3.595 |

Compensation Expense

Share-based compensation expense for the years ended December 31, 2011 and 2010, totaled approximately US$ 16,0 million and US$ 10,7 million, respectively as shown in the table below. No share-based compensation cost was capitalized in inventory in 2011 and 2010 as the amounts were not material.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Cost of sales |  |  | 3.125 |  |  |  | 932 |
Research and development |  |  | 5.889 |  |  |  | 2.087 |
Sales and marketing |  |  | 8.256 |  |  |  | 2.885 |
General and administrative |  |  | 20.672 |  |  |  | 7.688 |
Share-based compensation expense before any tax |  |  | 37.942 |  |  |  | 13.592 |
Income tax benefit |  |  | 21.894 |  |  |  | 2.856 |
Share-based compensation expense, net of tax |  |  | 16.048 |  |  |  | 10.736 |

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32. | Commitments and Contingencies

Lease commitments

We lease facilities and equipment under operating lease arrangements expiring in various years through an indefinite period of time. Certain rental commitments provide for escalating rental payments or have renewal options extending through various years which are not considered to be material. Certain facility and equipment leases constitute finance leases expiring in various years through 2018. The accompanying consolidated financial statements include the assets and liabilities arising from these finance lease obligations. Rent expense under non-cancelable operating lease agreements was US$ 20,3 million in 2011 and US$ 17,9 million in 2010.

Minimum future obligations under finance and operating leases at December 31, 2011, are as follows:

(in US$ thousands) |  | Finance Leases |  |  | Operating Leases |
2012 |  |  | 5.384 |  |  |  | 15.879 |
2013 |  |  | 5.307 |  |  |  | 12.067 |
2014 |  |  | 5.196 |  |  |  | 9.316 |
2015 |  |  | 5.178 |  |  |  | 6.905 |
2016 |  |  | 3.922 |  |  |  | 4.763 |
Thereafter |  |  | 2.802 |  |  |  | 3.018 |
Total minimum lease obligations at December 31, 2011 |  |  | 27.789 |  |  |  | 51.948 |
Less: amount representing interest |  |  | 4.287 |  |  |  |  |
Less: current portion |  |  | 4.006 |  |  |  |  |
Present value of minimum lease obligations at December 31, 2011 |  |  | 19.496 |  |  |  |  |

The information for the comparative period is provided below:

(in US$ thousands) |  | Finance Leases |  |  | Operating Leases |
2011 |  |  | 5.251 |  |  |  | 13.989 |
2012 |  |  | 5.272 |  |  |  | 12.145 |
2013 |  |  | 5.209 |  |  |  | 9.332 |
2014 |  |  | 5.121 |  |  |  | 7.862 |
2015 |  |  | 5.149 |  |  |  | 6.196 |
Thereafter |  |  | 7.062 |  |  |  | 11.013 |
Total minimum lease obligations at December 31, 2010 |  |  | 33.064 |  |  |  | 60.537 |
Less: amount representing interest |  |  | 6.121 |  |  |  |  |
Less: current portion |  |  | 3.588 |  |  |  |  |
Present value of minimum lease obligations at December 31, 2010 |  |  | 23.355 |  |  |  |  |

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Licensing and Purchase Commitments

We have licensing agreements with companies, universities and individuals, some of which require certain up-front payments. Royalty payments are required on net product sales ranging from one to 25 percent of covered products or based on quantities sold. Several of these agreements have minimum royalty requirements. The accompanying consolidated financial statements include accrued royalties relating to these agreements in the amount of US$ 25,7 million and US$ 16,4 million at December 31, 2011 and 2010, respectively. Royalty expense relating to these agreements amounted to US$ 43,3 million and US$ 45,7 million for the years ended December 31, 2011 and 2010, respectively. Royalty expense is primarily recorded in cost of sales, with a small portion recorded as research and development expense depending on the use of the technology under license. Some of these agreements also have minimum raw material purchase requirements and requirements to perform specific types of research.

At December 31, 2011, we had commitments to purchase goods or services, and for future minimum guaranteed royalties. They are as follows:

(in US$ thousands) |  | Purchase Commitments |  |  | Licensing Commitments |
2012 |  |  | 54.686 |  |  |  | 1.600 |
2013 |  |  | 25.556 |  |  |  | 1.122 |
2014 |  |  | 496 |  |  |  | 1.222 |
2015 |  |  | — |  |  |  | 1.222 |
2016 |  |  | — |  |  |  | 1.222 |
Thereafter |  |  | — |  |  |  | 3.388 |
Total licensing and purchase commitments at Dec. 31, 2011 |  |  | 80.738 |  |  |  | 9.776 |

The information for the comparative period is provided below:

(in US$ thousands) |  | Purchase Commitments |  |  | Licensing Commitments |
2011 |  |  | 50.888 |  |  |  | 1.064 |
2012 |  |  | 3.013 |  |  |  | 1.168 |
2013 |  |  | 1.600 |  |  |  | 1.368 |
2014 |  |  | 355 |  |  |  | 1.468 |
2015 |  |  | 355 |  |  |  | 1.468 |
Thereafter |  |  | 203 |  |  |  | 4.385 |
Total licensing and purchase commitments at Dec. 31, 2010 |  |  | 56.414 |  |  |  | 10.921 |

Contingent Consideration Commitments

Pursuant to the purchase agreements for certain acquisitions, as discussed in detail under 10. ‘Acquisitions’ the Company could be required to make additional contingent cash payments totaling up to US$ 103,1 million based on the achievement of certain revenue and operating results milestones as follows: US$ 26,5 million in 2012, US$ 11,1 million in 2013 , US$ 12,3 million in 2014, US$ 4,7 million in 2015, US$ 6,4 million in 2016, and US$ 42,1 million, payable in any 12-month period from now until 2016 based on the accomplishment of certain revenue targets, the launch of certain products or the grant of certain patent rights. Of the US$ 103,1 million total contingent obligation, approximately US$ 39,8 million is accrued as of December 31, 2011. We reassessed the fair value of the contingent consideration as of December 31, 2011, the result of which was not materially different from the fair value determined as of the date of the acquisitions.

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Employment Agreements

Certain of our employment contracts contain provisions which guarantee the payments of certain amounts in the event of a change in control, as defined in the agreements, or if the executive is terminated for reasons other than cause, as defined in the agreements. At December 31, 2011, the commitment under these agreements totaled US$ 19,2 million (2010: 19,4 million).

Contingencies

In the ordinary course of business, we provide a warranty to customers that our products are free of defects and will conform to published specifications. Generally, the applicable product warranty period is one year from the date of delivery of the product to the customer or of site acceptance, if required. Additionally, we typically provide limited warranties with respect to our services. From time to time, we also make other warranties to customers, including warranties that our products are manufactured in accordance with applicable laws and not in violation of third-party rights. We provide for estimated warranty costs at the time of the product sale. We believe our warranty reserves as of December 31, 2011 and 2010 appropriately reflect the estimated cost of such warranty obligations.

Preacquistion Contingencies

In connection with certain acquisitions, amounts were paid into escrow accounts to cover preacquistion contingencies assumed in the acquisition. The escrow amounts expected to be claimed by QIAGEN are recorded as an asset in prepaid expenses and other current assets and amount to US$ 7,0 million as of December 31, 2011 (US$ 27,0 million as of December 31, 2010). In addition, we have recorded US$ 6,2 million for preacquistion contingencies as a liability under other current liabilities as of December 31, 2011 (US$ 28,7 million as of December 31, 2010). We reassessed the fair value of the preacquistion contingencies as of December 31, 2011, the result of which was not materially different from the fair value determined as of the date of the acquisitions.

Litigation

From time to time, QIAGEN may be party to legal proceedings incidental to its business. As of December 31, 2011, certain claims, suits or legal proceedings arising out of the normal course of business have been filed or were pending against QIAGEN or its subsidiaries. These matters have arisen in the ordinary course and conduct of business, as well as through acquisition. Although it is not possible to predict the outcome of such litigation, based on the facts known to QIAGEN and after consultation with legal counsel, management believes that such litigation will not have a material adverse effect on QIAGEN’s financial position or results of operations.

QIAGEN Sciences, Inc. v. Operon Biotechnologies, Inc.

On July 2, 2009, Operon Biotechnologies, Inc. (Operon) commenced arbitration against QIAGEN Sciences, Inc. asserting a breach of a supply agreement between the parties and seeking monetary damages. Operon asserted that QIAGEN failed to comply with the preferred supplier provisions of the agreement and that this breach caused damages, including lost profits. QIAGEN denied the allegations and asserted counterclaims. The dispute was submitted to an arbitration panel and in June 2011 the arbitration panel concluded in favor of QIAGEN on all claims. As a result, as of December 31, 2011, Operon paid QIAGEN approximately US$ 2,1 million for past-due receivables, interest and legal fees.

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Cybeles Life Science Consulting (Claimant) vs. Research Biolabs Ptd. Ltd. (Respondent)

On August 18, 2010, Cybeles Life Science Consulting (Cybeles) initiated an arbitration proceeding against QIAGEN’s Singaporean affiliate Research Biolabs Pte. Ltd. (Research Biolabs) in the Swiss Chambers’ Court of Arbitration and Mediation. The Notice of Arbitration alleged breaches of the distribution agreement between the parties, and claimed loss and damage in the amount of approximately US$ 1,3 million. Research Biolabs considers the complaint as not justified and will continue to vigorously defend the claim.

33. | Employee Benefits

We maintain various benefit plans, including defined contribution and defined benefit plans. Our U.S. defined contribution plan is qualified under Section 401(k) of the Internal Revenue Code, and covers substantially all U.S. employees. Participants may contribute a portion of their compensation not exceeding a limit set annually by the Internal Revenue Service. This plan includes a provision for us to match a portion of employee contributions. Total expense under the 401(k) plans, including the plans acquired via business acquisitions, was US$ 2,3 million and US$ 2,1 million for the years ended December 31, 2011 and 2010, respectively. We also have a defined contribution plan which covers certain executives. We make matching contributions up to an established maximum. Matching contributions to the plan totaled approximately US$ 0,3 million in the years ended December 31, 2011 and 2010.

We have four defined benefit, non-contributory retirement or termination plans that cover certain employees in Germany, France, Japan and Italy. These defined benefit plans provide benefits to covered individuals satisfying certain age and service requirements. For certain plans, we calculate the vested benefits to which employees are entitled if they separate immediately. The benefits accrued on a pro-rata basis during the employees’ employment period are based on the individuals’ salaries, adjusted for inflation. The liability under the defined benefit plans was US$ 2,9 million at December 31, 2011, and US$ 2,4 million at December 31, 2010.

34. | Related Party Transaction

The Company has a consulting agreement with Dr. Metin Colpan, the Company’s former Chief Executive Officer and current Supervisory Board member, pursuant to which Dr. Colpan is paid a fee of EUR 2.750 per day for consulting services, subject to adjustment. We incurred consulting expenses of approximately US$ 0,1 million and US$ 0,3 million in December 31, 2011 and 2010, respectively, for scientific consulting services under this agreement.

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From time to time, the Company has transactions with other companies in which the Company holds an interest all of which are individually and in the aggregate immaterial, as summarized in the table below:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Net sales |  |  | 6.287 |  |  |  | 2.605 |
Loans receivable |  |  | 1.539 |  |  |  | 1.560 |
Accounts receivable |  |  | 3.606 |  |  |  | 2.400 |
Accounts payable |  |  | 4.642 |  |  |  | 1.755 |

Compensation of Directors and Officers

Total compensation for members of the Managing Board and the Supervisory Board for the period ended December 31, 2011, amounts to US$ 16,1 million (2010: 14,2 million). Total non-periodical remuneration according to Dutch Civil Code included in total compensation was US$ 4,3 million (US$ 4,3 million).

Compensation Policy

Since the creation of QIAGEN, management has formed a culture that seeks to attract and retain the best talent worldwide and reward associates for their performance. This compensation system aims to foster focus on achieving corporate strategic initiatives as well as personal accountability.

It is critical for QIAGEN to offer attractive compensation packages on a global basis. According to the QIAGEN philosophy, an employee who achieves their performance objectives should generally be awarded compensation comparable to the medial levels of compensation provided by relevant benchmark companies. In case of over or under performance, the actual total compensation may significantly differ from the benchmark median. QIAGEN participates in various compensation benchmarking surveys that provide information on the level, as well as the mix, of compensation awarded by various companies and industries for a broad range of positions around the world. In the case of QIAGEN, these include many peer life science and diagnostic companies based in the U.S.

QIAGEN has a “pay for performance” culture, with the compensation of employees linked to the achievement of business and individual performance goals. Business goals are established by the Executive Committee each year, and approved by the Compensation Committee. These goals are set at ambitious levels each year to motivate and drive performance, with a focus on both short-term and long-term quantifiable objectives. Performance metrics used for these goals include the achievement of targets for net sales, adjusted operating income and free cash flow. In 2011, the payments for short-term variable compensation were based on 77% achievement of the business goals.

Compensation for a significant majority of employees worldwide includes fixed base compensation and benefits, which vary according to local market customs, as well as a short-term variable cash bonus. The level of fixed compensation is paid in cash, usually on a monthly basis, and is designed to provide the employee with a reasonable standard of living relative to the compensation offered by peer companies. The amount of short-term variable cash bonus is designed to reward performance, with the payout amount based on the achievement of overall company results as well as individual performance against a written set of objectives. The payout cap for the short-term variable cash bonus, including for members of the Managing Board, is capped at 200% of the individual’s personal target bonus.

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Furthermore, to align our compensation programs with the interests of shareholders, senior executives receive a portion of their total compensation in the form of long-term compensation, which is granted as equity as a reward for performance. These grants are determined on an individual basis and approved by the Compensation Committee. These equity grants are predominantly made in the form of Restricted Stock Units (RSUs) with a staggered vesting period typically over three (40%), five (50%) and 10 years (10%) and stock options, which have a staggered vesting period typically over three years.

Compensation of Managing Board members:

The compensation granted to the members of the Managing Board in 2011 consisted of a fixed salary and other variable components, with the significant majority of compensation awarded in the form of QIAGEN equity.

Variable compensation included annual payments linked to business performance (bonuses), as well as long-term equity incentives that were awarded based on individual performance. Stock options granted to the Managing Board members must have an exercise price that is higher than the market price at the time of grant. Restricted Share Units granted to the Managing Board members, as is the case with all grants to employees, vest over a 10-year period. Some of these grants contain vesting hurdles related to the achievement of specific operational and financial goals that are not disclosed due to confidential reasons. The long-term vesting periods are designed to strengthen the Managing Board members’ commitment to QIAGEN and achieving its strategic initiatives, which in turn would benefit shareholders and other stakeholders. Reference is made to the corporate governance report which is part of the annual report and the section describing the remuneration of Managing Board and Supervisory Board.

The table below states the amounts earned on an accrual basis by our Managing Board members in 2011.

(in US$ thousands, except for number of share grants and options) |  | Peer M. Schatz |  |  | Roland Sackers |  |  | Dr. Joachim Schorr |  |  | Bernd Uder |
Fixed Salary |  |  | 1.305 |  |  |  | 576 |  |  |  | 366 |  |  |  | 370 |
Other |  |  | 1 |  |  |  | 26 |  |  |  | 38 |  |  |  | 15 |
Total fixed income 2011 |  |  | 1.306 |  |  |  | 602 |  |  |  | 404 |  |  |  | 385 |
Short-term variable cash bonus |  |  | 539 |  |  |  | 194 |  |  |  | 138 |  |  |  | 141 |
Total short-term income 2011 |  |  | 1.845 |  |  |  | 796 |  |  |  | 542 |  |  |  | 526 |
Defined contribution on benefit plan |  |  | 91 |  |  |  | 93 |  |  |  | 35 |  |  |  | 57 |
Number of stock options granted 2011 |  |  | 112.653 |  |  |  | 37.815 |  |  |  | 17.231 |  |  |  | 16.652 |
Related recognized compensation expense |  |  | 436 |  |  |  | 146 |  |  |  | 67 |  |  |  | 64 |
Number of restricted stock units granted 2011 |  |  | 388.427 |  |  |  | 130.385 |  |  |  | 29.705 |  |  |  | 28.708 |
Related recognized compensation expense |  |  | 1.606 |  |  |  | 539 |  |  |  | 123 |  |  |  | 119 |

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(in US$ thousands, except for number of share grants and options) |  | Peer M. Schatz |  |  | Roland Sackers |  |  | Dr. Joachim Schorr |  |  | Bernd Uder |
Fixed Salary |  |  | 1.219 |  |  |  | 522 |  |  |  | 341 |  |  |  | 345 |
Other |  |  | 1 |  |  |  | 43 |  |  |  | 23 |  |  |  | 14 |
Total fixed income 2010 |  |  | 1.220 |  |  |  | 565 |  |  |  | 364 |  |  |  | 359 |
Short-term variable cash bonus |  |  | 502 |  |  |  | 179 |  |  |  | 124 |  |  |  | 134 |
Total short-term income 2010 |  |  | 1.722 |  |  |  | 744 |  |  |  | 488 |  |  |  | 493 |
Defined contribution on benefit plan |  |  | 86 |  |  |  | 89 |  |  |  | 33 |  |  |  | 54 |
Number of stock options granted 2010 |  |  | 120.903 |  |  |  | 39.564 |  |  |  | 18.665 |  |  |  | 8.992 |
Related recognized compensation expense |  |  | 451 |  |  |  | 147 |  |  |  | 70 |  |  |  | 34 |
Number of restricted stock units granted 2010 |  |  | 339.470 |  |  |  | 106.179 |  |  |  | 50.091 |  |  |  | 54.296 |
Related recognized compensation expense |  |  | 1.494 |  |  |  | 467 |  |  |  | 220 |  |  |  | 239 |

The compensation expense for stock options and restricted stock units has been determined in accordance with IFRS 2.

The total recognized compensation expense in accordance with IFRS 2 in the year 2011 (2010) for stock options and restricted stock units including recognized expenses for equity awards granted in previous years amounted to US$ 7,1 million (US$ 5,8 million) for Mr. Schatz, US$ 2,1 million (US$ 2,0 million) for Mr. Sackers, US$ 1,0 million (US$ 0,9) for Mr. Schorr and US$ 0,9 million (US$ 0,9 million) for Mr. Uder.

Based on such valuations the total compensation including recognized compensation expenses for members of the Managing Board was US$ 15,1 million (US$ 13,2 million), and amounts US$ 9,0 million (US$ 7,6 million) for Mr. Schatz, US$ 3,0 million (US$ 2,8 million) for Mr. Sackers, US$ 1,5 million (US$ 1,4 million) for Mr. Schorr and US$ 1,5 million (US$ 1,4 million) for Mr. Uder. Total non-periodical remuneration according to Dutch Civil Code included in total compensation was US$ 4,1 million (US$ 4,1 million) and amounts to US$ 2,6 million (US$ 2,5 million) for Mr. Schatz, US$ 0,9 million (US$ 0,8 million) for Mr. Sackers, US$ 0,3 million (US$ 0,4 million) for Mr. Schorr and US$ 0,3 million (US$ 0,4 million) for Mr. Uder.

Compensation of Supervisory Board

The Supervisory Board compensation for 2011 consists of fixed retainer compensation, additional retainer amounts for Chairman and Vice Chairman, and committee membership fees. Annual remuneration of the Supervisory Board members is as follows:

| • |  | Fee paid to each member of the Supervisory Board: EUR 30.000

| • |  | Additional compensation payable to members holding the following Supervisory Board positions:

| • |  | Chairman: EUR 20.000, Vice Chairman: EUR 5.000

| • |  | Audit Committee: Chairman EUR 15.000, each member EUR 7.500

| • |  | Compensation Committee: Chairman EUR 10.000, each member EUR 5.000

Members of the Supervisory Board also receive EUR 1.000 for attending the Annual General Meeting and EUR 1.000 for attending each meeting of the Supervisory Board.

Consolidated Financial Statements | NOTES | F - 59

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Members of the Supervisory Board receive EUR 1.000 for attending each meeting of any subcommittees (other than Audit Committee, Compensation Committee and Selection and Appointment Committee).

Supervisory Board members also receive variable compensation, which is determined annually by the Compensation Committee pursuant to a formula based on growth of adjusted Earnings per Share provided that such remuneration will not exceed EUR 5.000 per year. We did not pay any agency or advisory service fees to members of the Supervisory Board other than US$ 0,3 million to Dr. Colpan for his scientific consulting services, including travel reimbursements.

Committees of the Supervisory Board

The Supervisory Board has established an Audit Committee, a Compensation Committee and a Selection and Appointment Committee, which are comprised of the following members:

Name |  | Independent |  | Member of Audit Committee |  | Member of Compensation Committee |  | Member of Selection and Appointment Committee
Prof. Dr. Detlev Riesner |  | · |  |  |  |  |  | · Chairman
Dr. Werner Brandt |  | · |  | · Chairman |  |  |  |
Erik Hornnaess |  | · |  | · |  | · Chairman |  | ·
Prof. Dr. Manfred Karobath |  | · |  |  |  | · |  |
Heino von Prondzynski |  | · |  | · |  |  |  |
Elizabeth E. Tallett |  | · |  | · |  | · |  |

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Total annual Supervisory Board compensation in 2011:

(in US$ thousands, except for number of share grants and options) |  | Prof. Dr. Detlev Riesner |  |  | Dr. Werner Brandt |  |  | Dr. Metin Colpan |  |  | Erik Hornnaess |  |  | Prof. Dr. Manfred Karobath |  |  | Heino von Prondzynski |  |  | Elizabeth E. Tallett |  |  | Dr. Vera Kallmeyer |
Short-term compensation 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed remuneration |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 42,0 |  |  |  | 21,0 |  |  |  | 14,0 |
Chairman / vice chairman committee |  |  | 28,0 |  |  |  | 21,0 |  |  |  | — |  |  |  | 21,0 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Meeting attendance |  |  | 8,4 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 5,6 |  |  |  | 4,2 |  |  |  | 2,8 |
Committee membership |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10,5 |  |  |  | 7,0 |  |  |  | 6,1 |  |  |  | 5,3 |  |  |  | 3,5 |
Subcommittee meeting attendance |  |  | 4,2 |  |  |  | — |  |  |  | 4,2 |  |  |  | — |  |  |  | 4,2 |  |  |  | 4,2 |  |  |  | — |  |  |  | 1,4 |
Variable cash bonus |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 7,0 |  |  |  | 3,5 |  |  |  | 2,3 |
|  |  | 89,6 |  |  |  | 77,0 |  |  |  | 60,2 |  |  |  | 87,5 |  |  |  | 67,2 |  |  |  | 64,9 |  |  |  | 34,0 |  |  |  | 24,0 |
Long-term compensation 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock options granted |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | 1.355 |  |  |  | — |  |  |  | — |
Related recognized compensation expense |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | 5,6 |  |  |  | — |  |  |  | — |
Number of restricted stock units granted |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | 4.671 |  |  |  | — |  |  |  | — |
Related recognized compensation expense |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | 19,5 |  |  |  | — |  |  |  | — |

The compensation expense for stock options and restricted stock units has been determined in accordance with IFRS 2.

The total recognized compensation expense in accordance with IFRS 2 in the year 2011 (2010) for stock options and restricted stock units including recognized expenses for equity awards granted in previous years amounted to US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Riesner, US$ 86,6 thousands (US$ 76,0 thousands) for Mr. Brandt, US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Colpan, US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Hornnaess, US$ 96,6 thousands (US$ 94,0 thousands) for Mr. Karobath, US$ 86,6 thousands (US$ 76,0 thousands) for Mr. von Prondzynski.

Based on such valuations the total compensation including recognized compensation expenses for members of the Supervisory Board was US$ 1.064,0 thousands (US$ 953,5 thousands) and amounts US$ 186,2 thousands (US$ 177,5 thousands) for Mr. Riesner, US$ 163,6 thousands (US$ 150,5 thousands) for Mr. Brandt, US$ 156,8 thousands (US$ 151,0 thousands) for Mr. Colpan, US$ 184,1 thousands (US$ 177,0 thousands) for Mr. Hornnaess, US$ 163,8 thousands (US$ 156,0 thousands) for Mr. Karobath, US$ 151,5 thousands (US$ 141,5 thousands) for Mr. von Prondzynski, US$ 33,9 thousands (US$ 0) for Ms. Tallett and US$ 24,0 thousands (US$ 0) for Ms. Kallmeyer. Total non-periodical remuneration according to Dutch Civil Code included in total compensation was US$ 198,4 thousands (US$ 198,6 thousands) and amounts to US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Riesner, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Brandt, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Colpan, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Hornnaess, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. Karobath, US$ 32,1 thousands (US$ 33,1 thousands) for Mr. von Prondzynski, US$ 3,5 thousands (US$ 0) for Ms. Tallett and US$ 2,3 thousands (US$ 0) for Ms. Kallmeyer.

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Total annual Supervisory Board compensation in 2010:

(in US$ thousands, except for number of share grants and options) |  | Prof. Dr. Detlev Riesner |  |  | Dr. Werner Brandt |  |  | Dr. Metin Colpan |  |  | Erik Hornnaess |  |  | Prof. Dr. Manfred Karobath |  |  | Heino von Prondzynski |
Short-term compensation 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed remuneration |  |  | 40,0 |  |  |  | 40,0 |  |  |  | 40,0 |  |  |  | 40,0 |  |  |  | 40,0 |  |  |  | 40,0 |
Chairman / vice chairman committee |  |  | 26,5 |  |  |  | 20,0 |  |  |  | — |  |  |  | 20,0 |  |  |  | — |  |  |  | — |
Meeting attendance |  |  | 8,0 |  |  |  | 8,0 |  |  |  | 8,0 |  |  |  | 6,5 |  |  |  | 6,5 |  |  |  | 6,5 |
Committee membership |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 10,0 |  |  |  | 6,5 |  |  |  | 10,0 |
Subcommittee meeting attendance |  |  | 2,5 |  |  |  | — |  |  |  | 2,5 |  |  |  | — |  |  |  | 2,5 |  |  |  | 2,5 |
Variable cash bonus |  |  | 6,5 |  |  |  | 6,5 |  |  |  | 6,5 |  |  |  | 6,5 |  |  |  | 6,5 |  |  |  | 6,5 |
|  |  | 83,5 |  |  |  | 74,5 |  |  |  | 57,0 |  |  |  | 83,0 |  |  |  | 62,0 |  |  |  | 65,5 |
Long-term compensation 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock options granted |  |  | 1.649 |  |  |  | 1.649 |  |  |  | 1.649 |  |  |  | 1.649 |  |  |  | 1.649 |  |  |  | 1.649 |
Related recognized compensation expense |  |  | 6,6 |  |  |  | 6,6 |  |  |  | 6,6 |  |  |  | 6,6 |  |  |  | 6,6 |  |  |  | 6,6 |
Number of restricted stock units granted |  |  | 4.424 |  |  |  | 4.424 |  |  |  | 4.424 |  |  |  | 4.424 |  |  |  | 4.424 |  |  |  | 4.424 |
Related recognized compensation expense |  |  | 20,0 |  |  |  | 20,0 |  |  |  | 20,0 |  |  |  | 20,0 |  |  |  | 20,0 |  |  |  | 20,0 |

Total vested and unvested Stock Options to officers and directors:

Dec. 31, 2011

|  | Vested Options |  |  | Unvested Options |  |  | Expiration Dates |  |  | Exercise Prices (US$) |  |  | Unvested Stock awards |
Peer M. Schatz |  |  | 2.107.371 |  |  |  | 234.096 |  |  |  | 9/2012 to 2/2021 |  |  |  | 4,59 to 22,43 |  |  |  | 1.467.856 |
Roland Sackers |  |  | 60.198 |  |  |  | 77.563 |  |  |  | 2/2018 to 2/2021 |  |  |  | 16,34 to 22,43 |  |  |  | 374.294 |
Dr. Joachim Schorr |  |  | 52.015 |  |  |  | 36.038 |  |  |  | 2/2017 to 2/2021 |  |  |  | 16,34 to 22,43 |  |  |  | 193.683 |
Bernd Uder |  |  | 47.599 |  |  |  | 28.703 |  |  |  | 2/2017 to 2/2021 |  |  |  | 16,34 to 22,43 |  |  |  | 193.099 |
Prof. Dr. Detlev H. Riesner |  |  | 51.838 |  |  |  | 3.101 |  |  |  | 4/2013 to 2/2021 |  |  |  | 6,02 to 22,43 |  |  |  | 19.785 |
Dr. Werner Brandt |  |  | 3.229 |  |  |  | 3.101 |  |  |  | 4/2018 to 2/2021 |  |  |  | 16,34 to 22,43 |  |  |  | 16.553 |
Dr. Metin Colpan |  |  | 645.171 |  |  |  | 3.101 |  |  |  | 4/2012 to 2/2021 |  |  |  | 6,02 to 22,43 |  |  |  | 19.785 |
Erik Hornnaess |  |  | 65.171 |  |  |  | 3.101 |  |  |  | 4/2013 to 2/2021 |  |  |  | 6,02 to 22,43 |  |  |  | 19.785 |
Prof. Dr. Manfred Karobath |  |  | 59.171 |  |  |  | 3.101 |  |  |  | 4/2013 to 2/2021 |  |  |  | 6,02 to 22,43 |  |  |  | 19.785 |
Heino von Prondzynski |  |  | 3.229 |  |  |  | 3.101 |  |  |  | 4/2018 to 2/2021 |  |  |  | 16,34 to 22,43 |  |  |  | 16.553 |
|  |  | 3.094.992 |  |  |  | 395.006 |  |  |  |  |  |  |  |  |  |  |  | 2.341.178 |

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Dec. 31, 2010

|  | Vested Options |  |  | Unvested Options |  |  | Expiration Dates |  |  | Exercise Prices (US$) |  |  | Unvested Stock awards |
Peer M. Schatz |  |  | 2.424.009 |  |  |  | 236.955 |  |  |  | 3/2011 to 2/2020 |  |  |  | 4,590 to 22,430 |  |  |  | 1.182.900 |
Roland Sackers |  |  | 62.425 |  |  |  | 77.521 |  |  |  | 3/2011 to 2/2020 |  |  |  | 16,340 to 22,430 |  |  |  | 377.885 |
Dr. Joachim Schorr |  |  | 109.091 |  |  |  | 36.731 |  |  |  | 10/2011 to 2/2020 |  |  |  | 12,546 to 22,430 |  |  |  | 180.054 |
Bernd Uder |  |  | 53.474 |  |  |  | 26.176 |  |  |  | 3/2011 to 2/2020 |  |  |  | 16,340 to 22,430 |  |  |  | 179.658 |
Prof. Dr. Detlev H. Riesner |  |  | 82.180 |  |  |  | 3.404 |  |  |  | 3/2011 to 2/2020 |  |  |  | 6,018 to 22,430 |  |  |  | 16.508 |
Dr. Werner Brandt |  |  | 1.571 |  |  |  | 3.404 |  |  |  | 4/2018 to 2/2020 |  |  |  | 16,340 to 22,430 |  |  |  | 13.276 |
Dr. Metin Colpan |  |  | 775.663 |  |  |  | 3.404 |  |  |  | 3/2011 to 2/2020 |  |  |  | 6,018 to 22,430 |  |  |  | 16.508 |
Erik Hornnaess |  |  | 91.513 |  |  |  | 3.404 |  |  |  | 3/2011 to 2/2020 |  |  |  | 6,018 to 22,430 |  |  |  | 16.508 |
Prof. Dr. Manfred Karobath |  |  | 85.513 |  |  |  | 3.404 |  |  |  | 3/2011 to 2/2020 |  |  |  | 6,018 to 22,430 |  |  |  | 16.508 |
Heino von Prondzynski |  |  | 1.571 |  |  |  | 3.404 |  |  |  | 4/2018 to 2/2020 |  |  |  | 16,340 to 22,430 |  |  |  | 13.276 |
|  |  | 3.687.010 |  |  |  | 397.807 |  |  |  |  |  |  |  |  |  |  |  | 2.013.081 |

35. | Financial Risk Factors and Use of Derivative Financial Instruments

35.1. Financial Risks

Market risk

The Group is exposed to market risk primarily related to foreign currency exchange rates, interest rates and the market value of investments in financial assets and equity securities. These exposures are centrally managed and are regulated by internal guidelines which require a continuous internal risk analysis. The overall objective of our risk management is to reduce the potential negative earnings effects from changes in interest and foreign exchange rates. Exposures are managed through operational methods and financial instruments relating to interest rate and foreign exchange risks. In the ordinary course of business, we use derivative instruments, including swaps, forwards and/or options, to manage potential losses from foreign currency exposures and variable rate debt. The principal objective of such derivative instruments is to minimize the risks and/or costs associated with global financial and operating activities. We do not utilize derivative or other financial instruments for trading or other speculative purposes. All derivatives are recognized as either assets or liabilities in the balance sheet and are measured at fair value with any change in fair value recognized in earnings in the period of change, unless the derivative qualifies as an effective hedge that offsets certain exposures. In determining fair value, we consider both the counterparty credit risk and our own creditworthiness.

Foreign currency exchange rates

The Group presents its consolidated financial statements in U.S. dollar. As a consequence of the global nature of QIAGEN’s business, the Group is exposed to foreign currency exchange rate movements, primarily in European and Asian countries. Foreign exchange risk arises when future commercial transactions or recognized assets or liabilities

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are denominated in a currency that is not the entity’s functional currency. To manage such foreign exchange risk the, entities of the group use FX swaps and forwards, FX options and cross-currency swaps, transacted exclusively by Global Treasury. Net investments in QIAGEN affiliates with a functional currency other than the U.S. dollar are of long-term nature and the Group does not hedge such foreign currency translation exposures.

A significant portion of our revenues and expenses are earned and incurred in currencies other than the U.S. dollar. The euro is the most significant such currency, with others including the British pound, Japanese yen, Swiss franc, and Canadian and Australian dollars. Fluctuations in the value of the currencies in which we conduct our business relative to the U.S. dollar have caused and will continue to cause U.S. dollar translations of such currencies to vary from one period to another. Due to the number of currencies involved, the constantly changing currency exposures, and the potential substantial volatility of currency exchange rates, we cannot predict the effect of exchange rate fluctuations upon future operating results. In general terms, depreciation of the U.S. dollar against our other foreign currencies will increase reported net sales. However, this effect is, at least partially, offset by the fact, that we also incur substantial expenses in foreign currencies.

We have significant production and manufacturing facilities located in Germany and Switzerland, and intercompany sales of inventory also expose us to foreign currency exchange rate risk. Intercompany sales of inventory are generally denominated in the local currency of the subsidiary purchasing the inventory in order to centralize foreign currency risk with the manufacturing subsidiary. Payment for intercompany purchases of inventory is required within 30 days from invoice date. The delay between the date the manufacturing subsidiaries record revenue and the date when the payment is received from the purchasing subsidiaries exposes us to foreign exchange risk. To the extent practicable, such exposures are offset by operational measures, which include intercompany factoring transactions. We have entered into in the past, and may enter into in the future, foreign exchange derivatives, including forward contracts and options, to manage the remaining foreign exchange risk.

For the presentation of market risks, IFRS 7 requires sensitivity analyses that show the effects of hypothetical changes of relevant risk variables on profit or loss and shareholders’ equity. Currency risks as defined by IFRS 7 arise on account of financial instruments being denominated in a currency that is not the functional currency and being of a monetary nature; differences resulting from the translation of financial statements into the Group’s presentation currency are not taken into consideration. Relevant risk variables are generally all non-functional currencies in which QIAGEN has financial instruments.

QIAGEN is exposed to currency risks from financial derivatives. If each of the respective currency pairs for which the Group has financial derivatives in place, which do not qualify for hedge accounting in accordance with IAS 39, varied from the rates used for the preparation of the consolidated financial statements, this would have had an effect on the net income of the Group. If, at December 31, 2011, the US dollar had gained (lost) 10 % against all identified major currencies, this would have had an effect of approximately US$ 22,6 million (2010: US$ 27,0 million) or US$ (17,2) million (2010: US$ (33,0) million). This effect would have been almost fully off-set by corresponding valuation adjustments in the positions, which economically had been hedged by these financial derivatives. Accordingly, the net effect of such variance in currency rates would not have been material.

If the U.S. dollar had gained (lost) 10 percent against other major currencies at December 31, 2011, the cash flow hedge reserve in equity attributable to equity holders of the parent and the fair value of hedging transactions would not have been changed at December 31, 2011 and 2010.

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Interest rates

The Group is exposed to interest rate risk by floating rate financial debt and floating rate financial assets. This exposure is managed by varying the proportion of fixed and floating rate debt, while all non-derivative financial assets pay interest on floating rates. Net financial income earned on the Group’s net financial assets is generally affected by changes in the level of interest rates, principally the Euro and the U.S. dollar interest rate.

At December 31, 2011, we had US$ 221,6 million in cash and cash equivalents (2010: US$ 830,4 million in cash and cash equivalents). Interest income earned on our cash investments is affected by changes in the relative levels of market interest rates. We only invest in high-grade investment securities. A hypothetical adverse 10% movement in market interest rates would decrease 2011 earnings by approximately US$ 0,4 million (2010: decrease of earnings by approximately US$ 0,4 million).

Borrowings against lines of credit are at variable interest rates. We had insignificant amounts outstanding against our lines of credit at December 31, 2011 and 2011. A hypothetical adverse 10% movement in market interest rates would not have materially impacted our financial statements.

At December 31, 2011, we had US$ 576,5 million in current and non-current debt (2010: US$ 845,2 million). A hypothetical adverse 10% movement in market interest rates would not have materially impacted our financial statements.

Liquidity risk

To date, we have funded our business primarily through internally generated funds, debt and the private and public sales of equity. Our primary use of cash has been to support continuing operations and our capital expenditure requirements including acquisitions. As of December 31, 2011 and 2010, we had cash and cash equivalents of US$ 221,6 million and US$ 830,4 million, respectively, and investments in current marketable securities of US$ 54,6 million and US$ 106,1 million, respectively. Cash and cash equivalents are primarily held in Euros, U.S. dollars and Swiss Francs, other than those cash balances maintained in the local currency of subsidiaries to meet local working capital needs. As of December 31, 2011 and 2010, we had working capital of US$ 253,2 million and US$ 970,5 million, respectively.

In December 2011, we entered into a €400,0 million syndicated multi-currency revolving credit facility expiring December 2016 of which €110,0 million (approximately US$ 142,3 million) was utilized at December 31, 2011 and is due in 2012. We have additional credit lines totaling US$ 8,6 million at variable interest rates, none of which was utilized as of December 31, 2011. We also have finance lease obligations, including interest, in the amount of US$ 23,5 million (2010: US$ 26,9 million), and repayment obligations of US$ 590,0 million for long-term debt (2010: US$ 873,0 million).

Credit risk

Management has a credit policy in place and the exposure to credit risk is monitored on an ongoing basis. Credit evaluations are performed on all new customers. There were no significant concentrations of credit risk during the reporting period. The maximum exposure to credit risk is represented by the carrying amount of each financial asset in the statement of financial position.

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Credit risk is managed on group basis, except for credit risk relating to accounts receivable balances. Each local entity is responsible for managing and analyzing the credit risk for each of their new clients before standard payment and delivery terms and conditions are offered.

Counterparty risk

We define counterparty risk as the part of credit risk that results from financial transactions. It includes the credit risk that arises from cash and cash equivalents, derivative financial instruments and deposits with banks and financial institutions and furthermore the issuer risk on debt securities, settlement risk on derivative and money market transactions. Counterparty risk is managed by dealing only with entities that have been approved internally by the CFO and the continuous monitoring of the counterparties credit standing as evidenced by public credit ratings, share prices and credit default swap levels. We believe that all of our counterparties represent a good credit risk and we therefore do not expect any losses due to non-performance by these counterparties.

Fair values

The carrying amounts of financial assets and financial liabilities currently approximate their fair values. Investments in unquoted equity instruments are measured at cost as their fair values cannot be measured reliably due to the lack of reliable information needed for the determination of the fair values. However, it is estimated that the carrying amounts of these investment approximate their fair values. Fair values of different classes of financial assets and financial liabilities are determined based on exchanges of assets and settlements of liabilities in past transactions.

Equity prices

The Group is exposed to equity price risks on the marketable portion of the available-for-sale equity securities. Equity securities typically relate to other biotechnology and research companies. Equity securities are not purchased as part of the normal day-to-day management of financial assets but must be authorized by the Board of Directors.

At December 31, 2011, the Company had investments in current available-for-sale debt securities which had a fair market value and cost of approximately US$ 54,6 million (2010: US$ 106,1 million).

Commodities

The Group has exposures to price risk related to anticipated purchases of certain commodities used as raw materials in its business. A change in commodity prices may alter the gross margin, but due to the limited exposure to any single raw material, a price change is unlikely to have a material unforeseen impact on the Group’s earnings.

35.2. Use of Derivative Financial Instruments

Derivatives and Hedging

In the ordinary course of business, we use derivative instruments, including swaps, forwards and/or options, to manage potential losses from foreign currency exposures and variable rate debt. The principal objective of such derivative instruments is to minimize the risks and/or costs associated with global financial and operating activities. We do not utilize derivative or other financial instruments for trading or other speculative purposes. We recognize all derivatives as either assets or liabilities on the balance sheet on a gross basis measure those instruments at fair

Consolidated Financial Statements | NOTES | F - 66

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value and recognize the change in fair value in earnings in the period of change, unless the derivative qualifies as an effective hedge that offsets certain exposures. We do not offset the fair value of derivative instruments with cash collateral held or received from the same counterparty under a master netting arrangement.

As of December 31, 2011 and December 31, 2010 , all derivatives that qualify for hedge accounting are cash-flow hedges. For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income (loss) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. In 2011 and 2010, we did not record any hedge ineffectiveness related to any cash-flow hedges in earnings and did not discontinue any cash-flow hedges. During the next 12 months, we expect that approximately US$ 0,8 million of derivative losses included in accumulated other comprehensive income, based on their valuation as of December 31, 2011, will be reclassified into income. The cash flows derived from derivatives, including those that are not designated as hedges, are classified in the operating section of the consolidated statements of cash flows, in the same category as the consolidated balance sheet account of the underlying item.

Foreign Currency Derivatives

As a globally active enterprise, the Company is subject to risks associated with fluctuations in foreign currencies in its ordinary operations. This includes foreign currency-denominated receivables, payables, debt, and other positions. The Company manages the foreign currency exposure on a group-wide basis primarily using foreign exchange forward contracts and cross-currency swaps.

The Company has foreign currency forward contracts with an aggregate notional amount of US$ 44,0 million, which qualify for hedge accounting as cash-flow hedges. The Company has determined that no ineffectiveness exists related to these derivatives. However, the differences between spot and forward rates were excluded from the assessment of hedge effectiveness and included in interest income as it effectively constitutes the difference in the interest rates of the respective currency pairs. The contracts matured in July 2011 and had fair market values at December 31, 2010, of approximately US$ 3,9 million included in other current liabilities in the accompanying consolidated statement of financial position.

In addition, the Company was party to cross-currency swaps which qualified as cash-flow hedges with a notional amount of US$ 120,0 million as of December 31, 2011 and 2010, which mature in November 2012 and had fair market values of US$ 1,0 million and US$ 4,6 million at December 31, 2011 and 2010, respectively, which are included in other non-current liabilities in the accompanying consolidated statement of financial position.

Undesignated Derivative Instruments

We are party to various foreign exchange forward and swap arrangements which had, at December 31, 2011, an aggregate notional value of approximately US$ 204,0 million and fair values of US$ 5,6 million and US$ (0,8) million, which are included in other current assets and other current liabilities, respectively, and which expire at various dates through April 2012. The transactions have been entered into to offset the effects from short-term balance sheet exposure to foreign currency exchange risk. Changes in the fair value of these arrangements have been recognized in other income (expense).

Consolidated Financial Statements | NOTES | F - 67

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We were party to various foreign exchange forward and swap arrangements which had, at December 31, 2010, an aggregate notional value of approximately US$ 295,4 million and fair values of US$ 0,7 million and US$ 5,1 million, which are included in other current assets and other current liabilities, respectively, and which expired at various dates through April 2011. The transactions have been used to offset the effects from short-term balance sheet exposure to foreign currency exchange risk. Changes in the fair value of these arrangements have been recognized in other income (expense).

Interest Rate Derivatives

We use interest rate derivative contracts on certain borrowing transactions to hedge fluctuating interest rates. We have entered into interest rate swaps in which we agree to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. During 2008, we entered into interest rate swaps, which effectively fixed the variable interest rates on US$ 200,0 million of our variable rate debt and qualify for hedge accounting as cash-flow hedges. We have determined that no ineffectiveness exists related to these swaps. During 2010, US$ 100,0 million of the swaps matured. The remaining US$ 100,0 million matured in October 2011. As of December 31, 2010, these swaps had an aggregate fair value of US$ 2,7 million, which is recorded in accrued and other liabilities in the accompanying consolidated statement of financial position.

36. Additional Information for Financial Instruments

Carrying Amounts, Measurement in Accordance with IAS 39 and Fair Values:

Dec. 31, 2011

(US$ thousands) |  | Category |  | Carrying amount |  |  | Amortized cost |  |  | Cost |  |  | At Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | LaR |  |  | 221.598 |  |  |  | 221.598 |  |  |  | 0 |  |  |  | 0 |
Available-for-sale assets |  | AfS |  |  | 61.379 |  |  |  | 0 |  |  |  | 6.802 |  |  |  | 54.577 |
Trade accounts receivable |  | LaR |  |  | 230.770 |  |  |  | 230.770 |  |  |  | 0 |  |  |  | 0 |
Derivatives in effective hedges |  | N/A |  |  | 658 |  |  |  | 0 |  |  |  | 0 |  |  |  | 658 |
Derivatives, undesignated |  | FVTPL |  |  | 5.489 |  |  |  | 0 |  |  |  | 0 |  |  |  | 5.489 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial debts |  | FLAC |  |  | (576.525 | ) |  |  | (576.525 | ) |  |  | 0 |  |  |  | 0 |
Finance lease obligations |  | N/A |  |  | (23.501 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Trade accounts payable |  | FLAC |  |  | (59.848 | ) |  |  | (59.848 | ) |  |  | 0 |  |  |  | 0 |
Derivatives in effective hedges |  | N/A |  |  | (1.732 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (1.732 | )
Derivatives, undesignated |  | FVTPL |  |  | (769 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (769 | )
Contingent consideration |  | FVTPL |  |  | (38.646 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (38.646 | )
Aggregated by category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and Receivables (LaR) |  |  |  |  | 452.368 |  |  |  | 452.368 |  |  |  | 0 |  |  |  | 0 |
Available-for-Sales Financial Assets (AfS) |  |  |  |  | 61.379 |  |  |  | 0 |  |  |  | 6.802 |  |  |  | 54.577 |
Financial Liabilities measured at Amortized Cost (FLAC) |  |  |  |  | (636.373 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (636.373 | )
Instruments at fair value through profit or loss (FVTPL) |  |  |  |  | (34.880 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (34.880 | )

Consolidated Financial Statements | NOTES | F - 68

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Dec. 31, 2010

(US$ thousands) |  | Category |  | Carrying amount |  |  | Amortized cost |  |  | Cost |  |  | At Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | LaR |  |  | 830.354 |  |  |  | 830.354 |  |  |  | 0 |  |  |  | 0 |
Available-for-sale assets |  | AfS |  |  | 109.436 |  |  |  | 0 |  |  |  | 3.359 |  |  |  | 106.077 |
Trade accounts receivable |  | LaR |  |  | 197.418 |  |  |  | 197.418 |  |  |  | 0 |  |  |  | 0 |
Derivatives, undesignated |  | FVTPL |  |  | 677 |  |  |  | 0 |  |  |  | 0 |  |  |  | 677 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial debts |  | FLAC |  |  | (845.184 | ) |  |  | (845.184 | ) |  |  | 0 |  |  |  | 0 |
Finance lease obligations |  | N/A |  |  | (26.942 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Trade accounts payable |  | FLAC |  |  | (47.803 | ) |  |  | (47.803 | ) |  |  | 0 |  |  |  | 0 |
Derivatives in effective hedges |  | N/A |  |  | (11.115 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (11.115 | )
Derivatives, undesignated |  | FVTPL |  |  | (5.113 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (5.113 | )
Contingent consideration |  | FVTPL |  |  | (22.510 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (22.510 | )
Aggregated by category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and receivables (LaR) |  |  |  |  | 1.027.772 |  |  |  | 1.027.772 |  |  |  | 0 |  |  |  | 0 |
Available-for-sales financial assets (AfS) |  |  |  |  | 109.436 |  |  |  | 0 |  |  |  | 3.359 |  |  |  | 106.077 |
Financial liabilities measured at amortized cost (FLAC) |  |  |  |  | (892.987 | ) |  |  | (892.987 | ) |  |  | 0 |  |  |  | 0 |
Instruments at fair value through profit or loss (FVTPL) |  |  |  |  | (29.946 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (29.946 | )

Cash and cash equivalents, notes receivable, trade accounts receivable and other assets mainly have short times to maturity. For this reason, their carrying amounts at the reporting date approximate the fair values.

Investments in unquoted equity instruments shown as available-for-sale assets are measured at cost as their fair values cannot be measured reliably due to the lack of reliable information needed for the determination of the fair values. However, it is estimated that the carrying amounts of these investment approximate their fair values.

The fair values of other non-current assets correspond to the present values of the payments related to the assets, taking into account the current interest rate parameters that reflect market and partner-based changes to terms and conditions and expectations.

Trade accounts payable generally have short times to maturity; the value reported approximates the fair value.

The fair values of the quoted financial debts equal the nominal amounts multiplied by the price quotations at the reporting date. The fair values of other financial liabilities are calculated as the present values of the payments associated with the liabilities.

As of December 31, 2011 and 2010, fair values of financial debts amount to US$ 624,3 million and US$ 1.021,8 million, respectively. The carrying amounts of all other financial assets and financial liabilities approximate their fair values.

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As of December 31, 2011 and 2010, there are no significant concentrations of risks arising from financial instruments.

|  | Dec. 31, 2011 |  |  | Dec. 31, 2010 |
(in US$ thousands) |  | Carrying amount |  |  | Fair Value |  |  | Carrying amount |  |  | Fair Value |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 221.598 |  |  |  | 221.598 |  |  |  | 830.354 |  |  |  | 830.354 |
Available-for-sale assets |  |  | 61.379 |  |  |  | 61.379 |  |  |  | 109.436 |  |  |  | 109.436 |
Trade accounts receivable |  |  | 230.770 |  |  |  | 230.770 |  |  |  | 197.418 |  |  |  | 197.418 |
Derivatives in effective hedges |  |  | 658 |  |  |  | 658 |  |  |  | 0 |  |  |  | 0 |
Derivatives measured at fair value through profit or loss |  |  | 5.489 |  |  |  | 5.489 |  |  |  | 677 |  |  |  | 677 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial debts |  |  | (636.373 | ) |  |  | (623.522 | ) |  |  | (892.987 | ) |  |  | (1.021.800 | )
Finance lease obligations |  |  | (23.501 | ) |  |  | (23.501 | ) |  |  | (26.942 | ) |  |  | (26.942 | )
Trade accounts payable |  |  | (59.848 | ) |  |  | (59.848 | ) |  |  | (47.803 | ) |  |  | (47.803 | )
Contingent consideration |  |  | (38.646 | ) |  |  | (38.646 | ) |  |  | (22.510 | ) |  |  | (22.510 | )
Derivatives in effective hedges |  |  | (1.065 | ) |  |  | (1.065 | ) |  |  | (11.115 | ) |  |  | (11.115 | )
Derivatives measured at fair value through profit or loss |  |  | (1.427 | ) |  |  | (1.427 | ) |  |  | (5.113 | ) |  |  | (5.113 | )

Net Results by Category

Dec. 31, 2011

|  |  |  |  | Subsequent Measurement |  |  |  |  |  |  |
(US$ thousands) |  | From interest |  |  | At fair value |  |  | Allowances / Impairments |  |  | De-recognition |  |  | Net result |
Loans and receivables (LaR) |  |  | 6.472 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 6.472 |
Available-for-sales financial assets (AfS) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Financial liabilities measured at amortized cost (FLAC) |  |  | (34.740 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (34.740 | )
Net result |  |  | (28.268 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (28.268 | )

Interest from financial instruments is recognized in financial expense.

The Company recognizes the other components of net gain/loss in other financial income/expense, except for impairments of trade receivables that are classified as “loans and receivables” which are reported under General and administrative, integration and other expense.

Consolidated Financial Statements | NOTES | F - 70

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The information for the comparative period is provided below:

Dec. 31, 2010

|  |  |  |  | Subsequent Measurement |  |  |  |  |  |  |
(US$ thousands) |  | From interest |  |  | At fair value |  |  | Allowances / Impairments |  |  | De-recognition |  |  | Net result |
Loans and receivables (LaR) |  |  | 3.313 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 3.313 |
Available-for-sales financial assets (AfS) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Financial liabilities measured at amortized cost (FLAC) |  |  | (37.619 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (37.619 | )
Net result |  |  | (34.306 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (34.306 | )

37. | Disclosures on Capital Management

The primary objectives of the Group’s capital management are to safeguard the Group’s ability to continue as a going concern and to ensure financial flexibility to execute the Group’s strategic growth targets. Furthermore we regularly review our capital structure ensuring a low cost of capital to enhance shareholder value.

An important indicator of capital management efforts is the ratio of shareholders’ equity compared to total assets as shown in the consolidated statement of financial position:

(in US$ thousands, except of ratio) |  | 2011 |  |  | 2010 |
Shareholders’ equity attributable to equity holders of the parent |  |  | 2.623.317 |  |  |  | 2.598.097 |
Total Assets |  |  | 3.834.154 |  |  |  | 4.043.898 |
Shareholders’ equity ratio in % |  |  | 68 | % |  |  | 64 | %

38. | Segment Information

During 2010, the Company determined that it operates as one business segment in accordance with IFRS 8 Operating Segments. As a result of the Company’s continued restructuring and streamlining of the growing organization, and with revised internal budgeting and reporting approaches, the Company’s chief operating decision maker (CODM) transitioned to making decisions with regards to business operations and resource allocation based on evaluations of QIAGEN as a whole. Accordingly, the Company operates as one reporting segment and this change in decision making process has evolved with our continued growth as a Company. Summarized product category and geographic information is shown in the tables below.

Consolidated Financial Statements | NOTES | F - 71

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Product Category Information

Net sales for the product categories are attributed based on those revenues related to sample and assay products and similarly related revenues, and revenues derived from instrumentation sales.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Consumables and related revenues |  |  | 1.011.863 |  |  |  | 937.714 |
Instrumentation |  |  | 157.884 |  |  |  | 149.717 |
Net Sales |  |  | 1.169.747 |  |  |  | 1.087.431 |

Geographical Information

Net sales are attributed to countries based on the location of the Company’s subsidiary generating the sale. QIAGEN operates manufacturing facilities in Germany, Switzerland, China, France, the United Kingdom and the United States that supply products to other countries. The sales from these manufacturing operations to other countries are included in the Net Sales of the countries in which the manufacturing locations are based. The intersegment portions of such net sales are excluded to derive consolidated net sales. No single customer represents more than ten percent of consolidated net sales. The Company’s official country of domicile is the Netherlands, which reported net sales of US$ 23,9 million and, US$ 21,5 million for the years ended 2011 and 2010, respectively, and these amounts are included in the line item Europe as shown in the table below.

(in US$ thousands) |  | 2011 |  |  | 2010 |
United States |  |  | 466.502 |  |  |  | 472.682 |
Other Americas |  |  | 55.137 |  |  |  | 50.912 |
Total Americas |  |  | 521.639 |  |  |  | 523.594 |
Europe |  |  | 444.441 |  |  |  | 398.029 |
Asia Pacific |  |  | 203.667 |  |  |  | 165.808 |
Net Sales |  |  | 1.169.747 |  |  |  | 1.087.431 |

Long-lived assets include property, plant and equipment. The Netherlands, which is included in the balances for Europe, reported long-lived assets of US$ 1,1 million and US$ 0,5 million for the years ended 2011 and 2010, respectively.

(in US$ thousands) |  | 2011 |  |  | 2010 |
United States |  |  | 124.263 |  |  |  | 162.910 |
Other Americas |  |  | 2.579 |  |  |  | 2.154 |
Total Americas |  |  | 126.842 |  |  |  | 165.064 |
Europe |  |  | 285.270 |  |  |  | 263.222 |
Asia Pacific & rest of world |  |  | 12.104 |  |  |  | 12.729 |
Long-lived Assets |  |  | 424.216 |  |  |  | 441.015 |

Consolidated Financial Statements | NOTES | F - 72

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39. | Subsequent Events

Based on the Company’s review, no other events or transactions have occurred subsequent to December 31, 2011, that would have a material impact on the financial statements as presented.

40. | Consolidated Companies

The following is a list of the Company’s subsidiaries as of December 31, 2011, other than certain subsidiaries that did not in the aggregate constitute a significant subsidiary:

Company |  | Country |  | Currency |  | Capital |  |  | Owner-ship |
Corbett Research Pty. Ltd. |  | Australia |  | AUD |  |  | 100.133 |  |  |  | 100 | %
Corbett Robotics Pty. Ltd. |  | Australia |  | AUD |  |  | 2 |  |  |  | 100 | %
Cellestis GmbH |  | Germany |  | EUR |  |  | 25.000 |  |  |  | 100 | %
Cellestis Inc. |  | USA |  | US$ |  |  | 100.000 |  |  |  | 100 | %
Cellestis International Pty. Ltd. |  | Australia |  | AUD |  |  | 100 |  |  |  | 100 | %
Cellestis Ltd. |  | Australia |  | AUD |  |  | 29.377.208 |  |  |  | 100 | %
IPSOGEN S.A. |  | France |  | EUR |  |  | 1.013.243 |  |  |  | 89 | %
Ipsogen Inc. |  | USA |  | US$ |  |  | 1.000 |  |  |  | 100 | %
QIAGEN Australia Holding Pty. Ltd. |  | Australia |  | AUD |  |  | 350.000.851 |  |  |  | 100 | %
QIAGEN B.V. |  | Netherlands |  | EUR |  |  | 18.000 |  |  |  | 100 | %
QIAGEN Canada Inc. |  | Canada |  | CAD |  |  | 3.000 |  |  |  | 100 | %
QIAGEN Deutschland Holding GmbH |  | Germany |  | EUR |  |  | 25.000 |  |  |  | 100 | %
QIAGEN Euro Finance S.A. |  | Luxemburg |  | US$ |  |  | 25.000 |  |  |  | 100 | %
QIAGEN Finance Deutschland GmbH |  | Germany |  | EUR |  |  | 25.000 |  |  |  | 100 | %
QIAGEN Finance (Luxembourg) S.A. |  | Luxemburg |  | EUR |  |  | 125.000 |  |  |  | 100 | %
QIAGEN Gaithersburg, Inc. |  | USA |  | US$ |  |  | 249.000 |  |  |  | 100 | %
QIAGEN GmbH |  | Germany |  | EUR |  |  | 210.000 |  |  |  | 100 | %
QIAGEN Hamburg GmbH |  | Germany |  | EUR |  |  | 178.000 |  |  |  | 100 | %
QIAGEN Inc. (Canada) |  | Canada |  | CAD |  |  | 50.000 |  |  |  | 100 | %
QIAGEN, Inc. (USA) |  | USA |  | US$ |  |  | 15.000 |  |  |  | 100 | %
QIAGEN Instruments AG |  | Switzerland |  | CHF |  |  | 14.939.000 |  |  |  | 100 | %
QIAGEN KK |  | Japan |  | JPY |  |  | 10.000.000 |  |  |  | 100 | %
QIAGEN Korea Ltd. |  | South Korea |  | KOW |  |  | 50.000.000 |  |  |  | 100 | %
QIAGEN Lake Constance GmbH |  | Germany |  | EUR |  |  | 50.000 |  |  |  | 100 | %
QIAGEN Ltd. |  | UK |  | GBP |  |  | 105.000 |  |  |  | 100 | %
QIAGEN Manchester Ltd. (formerly DxS Ltd.) |  | UK |  | GBP |  |  | 0 |  |  |  | 100 | %
QIAGEN North American Holding Inc. |  | USA |  | US$ |  |  | 1 |  |  |  | 100 | %
QIAGEN S.A.S. |  | France |  | EUR |  |  | 240.000 |  |  |  | 100 | %
QIAGEN Sciences LLC |  | USA |  | US$ |  |  | 0 |  |  |  | 100 | %
QIAGEN Shared Services, Inc. |  | USA |  | US$ |  |  | 3.185.000 |  |  |  | 100 | %
QIAGEN Shenzhen Co. Ltd. |  | China |  | CNY |  |  | 20.400.000 |  |  |  | 100 | %
QIAGEN S.r.l. |  | Italy |  | EUR |  |  | 100.000 |  |  |  | 100 | %
SABiosciences Corp. |  | USA |  | USD |  |  | 0 |  |  |  | 100 | %

Consolidated Financial Statements | NOTES | F - 73

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41. | Fees Paid to External Auditors

The service fees recognized in the consolidated financial statements 2011 and 2010 for the Ernst & Young network are as follows:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Audit fees |  |  | 906 |  |  |  | 947 |
Audit related fees |  |  | 372 |  |  |  | 813 |
Tax fees |  |  | 158 |  |  |  | 82 |
All other fees |  |  | 233 |  |  |  | 963 |
Total |  |  | 1.669 |  |  |  | 2.805 |

Venlo, the Netherlands,

April 27, 2012

Peer M. Schatz |  |  |  | Roland Sackers
Chief Executive Officer |  |  |  | Chief Financial Officer

Consolidated Financial Statements | NOTES | F - 74

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Financial statements for the year ended December 31, 2011

(in US$ thousands) |  | Note |  |  | 2011 |  |  | 2010 |
STATEMENT OF FINANCIAL POSITION |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Other intangible assets |  |  | (2 | ) |  |  | 767 |  |  |  | 1.262 |
Goodwill |  |  | (3 | ) |  |  | 146.862 |  |  |  | 99.971 |
Office equipment |  |  | (4 | ) |  |  | 635 |  |  |  | 120 |
Non-current available-for-sale financial instruments |  |  | (5 | ) |  |  | 6.802 |  |  |  | 3.359 |
Financial assets |  |  | (6 | ) |  |  | 2.143.141 |  |  |  | 1.807.534 |
Total non-current assets |  |  |  |  |  |  | 2.298.207 |  |  |  | 1.912.246 |
Prepaid expenses and other current assets |  |  |  |  |  |  | 10.005 |  |  |  | 2.066 |
Receivables from Group Companies |  |  |  |  |  |  | 364.166 |  |  |  | 23.987 |
Current available-for-sale financial instruments |  |  | (5 | ) |  |  | 45.287 |  |  |  | 106.077 |
Cash and cash equivalents |  |  |  |  |  |  | 72.133 |  |  |  | 612.332 |
Total current assets |  |  |  |  |  |  | 491.591 |  |  |  | 744.462 |
Total assets |  |  |  |  |  |  | 2.789.798 |  |  |  | 2.656.708 |
Shareholder’s equity and liabilities |  |  |  |  |  |  |  |  |  |  |  |
Common shares |  |  | (7 | ) |  |  | 3.260 |  |  |  | 3.093 |
Share premium |  |  |  |  |  |  | 1.842.648 |  |  |  | 1.811.633 |
Legal reserves |  |  | (9 | ) |  |  | 34.254 |  |  |  | 75.806 |
Cumulative foreign currency translation adjustments |  |  |  |  |  |  | 20.707 |  |  |  | 70.692 |
Retained earnings |  |  |  |  |  |  | 679.307 |  |  |  | 494.876 |
Net income for the period |  |  |  |  |  |  | 43.143 |  |  |  | 141.997 |
Total shareholder’s equity |  |  |  |  |  |  | 2.623.319 |  |  |  | 2.598.097 |
Payables to Group Companies |  |  |  |  |  |  | 3.168 |  |  |  | 23.351 |
Accrued liabilities |  |  |  |  |  |  | 162.760 |  |  |  | 34.595 |
Trade accounts payable |  |  |  |  |  |  | 551 |  |  |  | 665 |
Total liabilities |  |  |  |  |  |  | 166.479 |  |  |  | 58.611 |
Total shareholder’s equity and liabilities |  |  |  |  |  |  | 2.789.798 |  |  |  | 2.656.708 |
INCOME STATEMENT |  |  |  |  |  |  |  |  |  |  |  |
Net income from investments (after tax) |  |  |  |  |  |  | 30.728 |  |  |  | 133.761 |
Other income (after tax) |  |  |  |  |  |  | 12.415 |  |  |  | 8.236 |
Net income for the period |  |  |  |  |  |  | 43.143 |  |  |  | 141.997 |

Financial Statements | F - 75

##### Table of Contents

QIAGEN N.V.

Statement of Changes in Equity

for the year ended December 31, 2010

(in U$ thousands) |  |  |  |  | Common shares |  |  | Share premium |  |  | Retained earnings |  |  | Net Income |  |  | Legal Reserves |  |  | Foreign currency translation |  |  | Total shareholders’ equity |
At January 1, 2010 |  |  |  |  |  |  | 3.221 |  |  |  | 1.785.345 |  |  |  | 366.972 |  |  |  | 131.634 |  |  |  | 68.393 |  |  |  | 64.451 |  |  |  | 2.420.016 |
Appropriation of prior year net income |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 131.634 |  |  |  | (131.634 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Net income for the period |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 141.997 |  |  |  | 0 |  |  |  | 0 |  |  |  | 141.997 |
Income and expense directly recognized in equity |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 3.683 |  |  |  | 6.100 |  |  |  | 9.783 |
Allocation to legal reserves |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | (3.730 | ) |  |  | 0 |  |  |  | 3.730 |  |  |  | 0 |  |  |  | 0 |
Effect from foreign currency translation |  |  |  |  |  |  | (141 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 141 |  |  |  | 0 |
Stock options |  |  |  |  |  |  | 13 |  |  |  | 26.288 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 26.301 |
At December 31, 2010 |  |  |  |  |  |  | 3.093 |  |  |  | 1.811.633 |  |  |  | 494.876 |  |  |  | 141.997 |  |  |  | 75.806 |  |  |  | 70.692 |  |  |  | 2.598.097 |
for the year ended December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(in U$ thousands) |  | Note |  |  | Common shares |  |  | Share premium |  |  | Retained earnings |  |  | Net Income |  |  | Legal Reserves |  |  | Foreign currency translation |  |  | Total shareholders’ equity |
At January 1, 2011 |  |  |  |  |  |  | 3.093 |  |  |  | 1.811.633 |  |  |  | 494.876 |  |  |  | 141.997 |  |  |  | 75.806 |  |  |  | 70.692 |  |  |  | 2.598.097 |
Appropriation of prior year net income |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 141.997 |  |  |  | (141.997 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Net income for the period |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 43.143 |  |  |  | 0 |  |  |  | 0 |  |  |  | 43.143 |
Income and expense directly recognized in equity |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 882 |  |  |  | (49.833 | ) |  |  | (48.951 | )
Allocation to legal reserves |  |  | (9 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 42.434 |  |  |  | 0 |  |  |  | (42.434 | ) |  |  | 0 |  |  |  | 0 |
Effect from foreign currency translation |  |  |  |  |  |  | 152 |  |  |  | 0 |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  | (152 | ) |  |  | 0 |
Stock options |  |  |  |  |  |  | 15 |  |  |  | 31.015 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 31.030 |
At December 31, 2011 |  |  |  |  |  |  | 3.260 |  |  |  | 1.842.648 |  |  |  | 679.307 |  |  |  | 43.143 |  |  |  | 34.254 |  |  |  | 20.707 |  |  |  | 2.623.319 |

Financial Statements | F - 76

##### Table of Contents

QIAGEN N.V.

QIAGEN N.V.

NOTES TO THE COMPANY FINANCIAL STATEMENTS

FOR THE YEAR ENDED DECEMBER 31, 2011

1. | Accounting policies

The financial statements of QIAGEN N.V. (the ‘Company’) included in this section are prepared in accordance with IFRS accounting principles as used in the consolidated financial statements, considering the provisions of part 9 of Book 2 of the Dutch Civil Code.

As provided in section 402 of the Dutch Civil Code, Book 2, the income statement of QIAGEN N.V. is condensed and includes only the net income from investments after tax and other income after tax, as the Company’s figures are included in the consolidated financial statements.

2. | Other intangible assets

Intangible assets represent patent rights and licenses. There were no additions to intangible assets during the reporting periods 2011 and 2010. The historic cost of patent rights and licenses as at December 31, 2011, was US$ 5,9 million (2010: US$ 5,9 million). The accumulated amortization as at December 31, 2011, amounts to US$ 5,1 million (2010: US$ 4,6 million). Amortization charge considered during the reporting 2011 was US$ 0,5 million (2010: US$ 0,6 million).

3. | Goodwill

Goodwill development during the reporting period 2011 was as follows:

(in US$ thousands) |  | 2011 |  |  | 2010 |
Goodwill as at January, 1st |  |  | 99.971 |  |  |  | 93.281 |
Goodwill acquired during the year |  |  | 50.615 |  |  |  | 3.280 |
Currency adjustments |  |  | (3.724 | ) |  |  | 3.410 |
Goodwill as at December, 31st |  |  | 146.862 |  |  |  | 99.971 |

Additions during the period 2011 to goodwill resulted from the acquisition of Ipsogen SA,( US$ 52,1 million) and from earn-out and milestones payments and purchase price adjustments related to the 2009 acquisition of DxS Ltd., (US$ (1,5) million).

Financial Statements QIAGEN N.V. | NOTES | F - 77

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QIAGEN N.V.

4. | Office equipment and computer software

Additions to office equipment and computer software from the increase of employees were US$ 626 thousands during 2011 and US$ 84 thousands during 2010. The historic cost as at December 31, 2011 for office equipment and computer software was US$ 832 thousands (2010: US$ 206 thousands). Accumulated depreciation as at December 31, 2011 was US$ 197 thousands (2010: US$ 86 thousands). Amortization charge during 2011 was US$ 111 thousands (2010: US$ 16 thousands).

As at December 31, 2011 the net book value of office equipment and computer software amounts US$ 635 thousands (2010: US$ 120 thousands).

5. | Available-for-sale financial instruments

At December 31, 2011, the Company had short-term investments in unquoted debt securities which had a fair market value and cost of approximately US$ 45,3 million (2010: US$ 106,1 million) in current available-for-sale financial instruments. At December 31, 2011, the Company holds investments of US$ 6,8 million for two non-controlling interests in privately-held companies which are classified as non-current available-for-sale equity securities (2010: US$ 3,4 million). The investments are accounted for under the cost-method.

(in US$ thousands) |  | 2011 |  |  | 2010 |
Unquoted equity securities |  |  | 6.802 |  |  |  | 3.359 |
Unquoted debt securities |  |  | 45.287 |  |  |  | 37.077 |
Short-term funds |  |  | 0 |  |  |  | 70.000 |
Available-for-sale financial Instruments |  |  | 52.089 |  |  |  | 109.436 |
thereof current Afs financial instruments |  |  | 45.287 |  |  |  | 106.077 |
thereof non-current Afs financial instruments |  |  | 6.802 |  |  |  | 3.359 |

6. | Financial fixed assets

(in US$ thousands) |  | Total |  |  | Investments in subsidiaries |  |  | Participation interest |  |  | Loans receivable |
January 1, 2010 |  |  | 1.461.671 |  |  |  | 944.305 |  |  |  | 394 |  |  |  | 516.972 |
Increases |  |  | 581.744 |  |  |  | 566.212 |  |  |  | 3.927 |  |  |  | 11.605 |
Decreases |  |  | (317.886 | ) |  |  | 0 |  |  |  | 0 |  |  |  | (317.886 | )
Dividends received |  |  | (36.800 | ) |  |  | (36.800 | ) |  |  | 0 |  |  |  | 0 |
Share of net profit |  |  | 104.197 |  |  |  | 104.186 |  |  |  | 11 |  |  |  | 0 |
Translation adjustments |  |  | 14.608 |  |  |  | 14.608 |  |  |  | 0 |  |  |  | 0 |
December 31, 2010 |  |  | 1.807.534 |  |  |  | 1.592.511 |  |  |  | 4.332 |  |  |  | 210.691 |

Financial Statements QIAGEN N.V. | NOTES | F - 78

##### Table of Contents

QIAGEN N.V.

Financial fixed assets, continued

(in US$ thousands) |  | Total |  |  | Investments in subsidiaries |  |  | Participation interest |  |  | Loans receivable |
January 1, 2011 |  |  | 1.807.534 |  |  |  | 1.592.511 |  |  |  | 4.332 |  |  |  | 210.691 |
Increases |  |  | 738.451 |  |  |  | 736.240 |  |  |  | 0 |  |  |  | 2.211 |
Dividends received |  |  | (416.826 | ) |  |  | (416.826 | ) |  |  | 0 |  |  |  | 0 |
Share of net profit |  |  | 62.833 |  |  |  | 63.021 |  |  |  | (188 | ) |  |  | 0 |
Translation adjustments |  |  | (48.851 | ) |  |  | (48.851 | ) |  |  | 0 |  |  |  | 0 |
December 31, 2011 |  |  | 2.143.141 |  |  |  | 1.926.095 |  |  |  | 4.144 |  |  |  | 212.902 |

7. | Common shares

The authorized classes of our shares consist of Common Shares, Preference Shares and Financing Preference Shares. No Financing Preference Shares or Preference Shares have been issued. The Company had the following authorized shares issued and outstanding as per end of December 31, 2011:

Authorized, (in thousands) |  | 2011 |  |  | 2010 |
Common shares |  |  | 410.000 |  |  |  | 410.000 |
Preference shares |  |  | 450.000 |  |  |  | 450.000 |
Financing preference shares |  |  | 40.000 |  |  |  | 40.000 |
At December 31st |  |  | 900.000 |  |  |  | 900.000 |
Issued and outstanding, (in thousands) |  | 2011 |  |  | 2010 |
Common shares |  |  | 234.221 |  |  |  | 233.115 |
At December 31st |  |  | 234.221 |  |  |  | 233.115 |
Par value in EUR per share |  | 2011 |  |  | 2010 |
Common shares |  |  | 0,01 |  |  |  | 0,01 |
Preference shares |  |  | 0,01 |  |  |  | 0,01 |
Financing preference shares |  |  | 0,01 |  |  |  | 0,01 |
in EUR thousands |  | 2011 |  |  | 2010 |
Common shares |  |  | 2.342,21 |  |  |  | 2.331,15 |
At December 31st |  |  | 2.341,21 |  |  |  | 2.331,15 |

Financial Statements QIAGEN N.V. | NOTES | F - 79

##### Table of Contents

QIAGEN N.V.

8. | Subsidiaries

At December 31, 2011, the Company’s most important investments comprise:

Name |  | Registered office |  | Owned |
QIAGEN Australia Holding Pty. Ltd. |  | Victoria, Australia |  |  | 100 | %
QIAGEN B.V. |  | Venlo, The Netherlands |  |  | 100 | %
QIAGEN Deutschland Holding GmbH |  | Hilden, Germany |  |  | 100 | %
QIAGEN Euro Finance (Luxembourg) S.A. |  | Luxembourg |  |  | 100 | %
QIAGEN Finance (Luxembourg) S.A. |  | Luxembourg |  |  | 100 | %
QIAGEN US Finance Holding (Luxembourg) S.A. |  | Luxembourg |  |  | 100 | %
Ipsogen S.A. |  | Marseille, France |  |  | 89,3 | %
QIAGEN Inc. |  | Mississauga, Canada |  |  | 100 | %
QIAGEN Pty. Ltd. |  | Victoria, Australia |  |  | 100 | %
SABiosciences Corp. |  | Frederick, United States |  |  | 100 | %
QIAGEN Shenzen Co Ltd. |  | Shenzen, China |  |  | 100 | %

9. | Legal Reserve

Legal reserves as of December 31, 2011, in the amount of US$ 34,3 million (2010: US$ 75,8 million) were set up in connection with capitalized development expenses of US$ (42,4) million in 2011 and US$ 3,7 million in 2010 and effects recognized directly in equity relating to hedge accounting of US$ 0,8 million for 2011 and US$ 3,7 million in 2010.

10. | Employee information

The average number of employees during the year 2011 was 14 (2010: seven).

11. | Remuneration of Directors and Officers

Detailed information on remuneration of the members of the Managing and Supervisory Board along with information about granted stock options and restricted stock units is provided under note 34 to the consolidated financial statements of the Group.

Financial Statements QIAGEN N.V. | NOTES | F - 80

##### Table of Contents

QIAGEN N.V.

12. | Audit Fees

At our 2011 Annual General Meeting of Shareholders held on June 30, 2011, our shareholders appointed Ernst & Young Accountants LLP to serve as our auditors for the fiscal year ended

December 31, 2011. Set forth below are the total fees billed (or expected to be billed), on a consolidated basis, by Ernst & Young Network:

|  | 2011 |  |  | 2010 |
(in US$ thousands) |  | E&Y Network |  |  | E&Y LLP Netherlands |  |  | E&Y Network |  |  | E&Y LLP Netherlands |
Fees for the audit and review |  |  | 828 |  |  |  | 78 |  |  |  | 876 |  |  |  | 71 |
Other assurance services |  |  | 96 |  |  |  | 276 |  |  |  | 725 |  |  |  | 88 |
Fees for tax services |  |  | 158 |  |  |  | 0 |  |  |  | 82 |  |  |  | 0 |
All other fees |  |  | 233 |  |  |  | 0 |  |  |  | 963 |  |  |  | 0 |
Service fees to external auditors |  |  | 1.315 |  |  |  | 354 |  |  |  | 2.646 |  |  |  | 159 |

Fees for audit and review of financial statements consist of fees and expenses billed for the annual audit and quarterly review of QIAGEN’s consolidated financial statements. They also include fees billed for other audit services, which are those services that only the statutory auditor can provide, and include the review of documents filed with the Securities Exchange Commission.

13. | Guarantees

In connection with the issuance of convertible notes in the amount of US$ 150 million by QIAGEN Finance (Luxembourg) S.A. in 2004 the Company is fully and unconditionally guaranteeing payments of principal and interest on the notes.

In connection with the issuance of convertible notes in the amount of US$ 300 million by QIAGEN Euro Finance (Luxembourg) S.A. in 2006 the Company is fully and unconditionally guaranteeing payments of principal and interest on the notes.

The Company has granted a guarantee to the lenders in the new €400 million syndicated revolving credit facility as security for any drawings under such facility of its subsidiaries. No amounts had been borrowed by any subsidiary of the Company under such facility as of December 31, 2011.

Venlo, the Netherlands,

April 27, 2012

Peer M. Schatz |  |  |  | Roland Sackers
Chief Executive Officer |  |  |  | Chief Financial Officer

Financial Statements QIAGEN N.V. | NOTES | F - 81

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QIAGEN N.V.

OTHER INFORMATION

Annual Report 2011

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QIAGEN N.V.

Appropriation of Net Income

According to Article 40 till 42 of the articles of association, the allocation of net income will be as follows. Subject to certain exceptions, dividends may only be paid out of profits as shown in our annual report as adopted by the General Meeting of Shareholders. Distributions may not be made if the distribution would reduce the shareholders’ equity below the sum of the paid-up capital and any reserves required by Dutch Law or the Articles.

Out of profits, dividends must first be paid on any outstanding Preference Shares (the “Preference Share Dividend”) in a percentage (the “Preference Share Dividend Percentage”) of the obligatory amount (call) paid up on such shares at the beginning of the fiscal year in respect of which the distribution is made. The Preference Share Dividend Percentage is equal to the Average Main Refinancing Rates during the financial year for which the distribution is made. Average Main Refinancing Rate shall be made understood to mean the average value on each individual day during the financial year for which the distribution is made of the Main Refinancing Rates prevailing on such day. Main Refinancing Rate shall be understood to mean the rate of the Main Refinancing Operation as determined and published from time to time by the European Central Bank. If and to the extent that profits are not sufficient to pay the Preference Share Dividend in full, the deficit shall be paid out of the reserves, with the exception of any reserve, which was formed as share premium reserve upon the issue of Financing Preference Shares. If in any fiscal year the profit is not sufficient to make the distributions referred to above and if no distribution or only a partial distribution is made from the reserves referred to above, such that the deficit is not fully made good no further distributions will be made as described below until the deficit has been made good.

Out of profits remaining after payment of any dividends on Preference Shares such amounts shall be kept in reserve as determined by the Supervisory Board. Out of any remaining profits not allocated to reserve, a dividend shall be paid on the Financing Preference Shares in a percentage over the par value, increased by the amount of share premium that was paid upon the first issue of Financing Preference Shares, which percentage is related to the average effective yield on the prime interest rate on corporate loans in the United States as quoted in the Wall Street Journal. If and to the extent that the profits are not sufficient to pay the Financing Preference Share Dividend in full, the deficit may be paid out of the reserves if the Managing Board so decides with the approval of the Supervisory Board, with the exception of the reserve which was formed as share premium upon the issue of Financing Preference Shares.

Insofar as the profits have not been distributed or allocated to the reserves as specified above, they are at the free disposal of the General Meeting of Shareholders, provided that no further dividends will be distributed on the Preference Shares or the Financing Preference Shares.

The General Meeting may resolve, on the proposal of the Supervisory Board, to distribute dividends or reserves, wholly or partially, in the form of QIAGEN shares.

Annual Report 2011 | F - 82

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QIAGEN N.V.

Subsequent Events

Based on the Company’s review, no events or transactions have occurred subsequent to December 31, 2011, that would have a material impact on the financial statements as presented.

Venlo, April 27, 2012

QIAGEN N.V.

Peer M. Schatz |  | Roland Sackers |  | Bernd Uder |  | Joachim Schorr

Annual Report 2011 | F - 83

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QIAGEN N.V.

Independent Auditor’s Report

To the Shareholders, Supervisory Board and Management Board of QIAGEN N.V.

Report on the financial statements

We have audited the accompanying financial statements 2011 of QIAGEN N.V., Venlo, the Netherlands. The financial statements include the consolidated financial statements and the company financial statements. The consolidated financial statements comprise the consolidated statement of financial position as at December 31, 2011, the consolidated income statement, the consolidated statement of comprehensive income, consolidated statement of cash flows and the consolidated statement of changes in equity for the year then ended, and notes, comprising a summary of the significant accounting policies and other explanatory information. The company financial statements comprise the company statement of financial position as at December 31, 2011, the company income statement and company statement of changes in equity for the year then ended and the notes, comprising a summary of the accounting policies and other explanatory information.

Management’s responsibility

Management is responsible for the preparation and fair presentation of these financial statements in accordance with International Financial Reporting Standards as adopted by the European Union and with Part 9 of Book 2 of the Dutch Civil Code, and for the preparation of the managing directors’ report in accordance with Part 9 of Book 2 of the Dutch Civil Code. Furthermore management is responsible for such internal control as it determines is necessary to enable the preparation of the financial statements that are free from material misstatement, whether due to fraud or error.

Auditor’s responsibility

Our responsibility is to express an opinion on these financial statements based on our audit. We conducted our audit in accordance with Dutch law, including the Dutch Standards on Auditing. This requires that we comply with ethical requirements and plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free from material misstatement.

An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the financial statements. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the financial statements, whether due to fraud or error.

In making those risk assessments, the auditor considers internal control relevant to the entity’s preparation and fair presentation of the financial statements in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the entity’s internal control. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of accounting estimates made by management, as well as evaluating the overall presentation of the financial statements.

We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opinion.

Opinion with respect to the financial statements

In our opinion, the consolidated financial statements give a true and fair view of the financial position of QIAGEN N.V. as at December 31, 2011 and of its result and its cash flows for the year then ended in accordance with International Financial Reporting Standards as adopted by the European Union and with Part 9 of Book 2 of the Dutch Civil Code.

Annual Report 2011 | F - 84

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QIAGEN N.V.

Opinion with respect to the company financial statements

In our opinion, the company financial statements give a true and fair view of the financial position of QIAGEN N.V. as at December 31, 2011 and of its result for the year then ended in accordance with Part 9 of Book 2 of the Dutch Civil Code.

Report on other legal and regulatory requirements

Pursuant to the legal requirement under Section 2:393 sub 5 at e and f of the Dutch Civil Code, we have no deficiencies to report as a result of our examination whether the managing directors’ report, to the extent we can assess, has been prepared in accordance with Part 9 of Book 2 of this Code, and whether the information as required under Section 2:392 sub 1 at b-h has been annexed. Further we report that the managing directors’ report to the extent we can assess, is consistent with the financial statements as required by Section 2:391 sub 4 of the Dutch Civil Code.

Eindhoven, April 27, 2012

Ernst & Young Accountants LLP

Signed by W.J. Spijker

Annual Report 2011 | F - 85

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

QIAGEN N.V.
By: |  | /s/ Roland Sackers
|  | Roland Sackers
|  | Chief Financial Officer

Date: November 5, 2012