<SUBMISSION>
<ACCESSION-NUMBER>0001206774-04-001654
<TYPE>SC TO-C
<PUBLIC-DOCUMENT-COUNT>5
<FILING-DATE>20041117
<DATE-OF-FILING-DATE-CHANGE>20041117
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>REGENERON PHARMACEUTICALS INC
<CIK>0000872589
<ASSIGNED-SIC>2834
<IRS-NUMBER>133444607
<STATE-OF-INCORPORATION>NY
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC TO-C
<ACT>34
<FILE-NUMBER>005-41938
<FILM-NUMBER>041151004
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>777 OLD SAW MILL RIVER RD
<CITY>TARRYTOWN
<STATE>NY
<ZIP>10591-6707
<PHONE>9143477000
</BUSINESS-ADDRESS>
</SUBJECT-COMPANY>
<FILED-BY>
<COMPANY-DATA>
<CONFORMED-NAME>REGENERON PHARMACEUTICALS INC
<CIK>0000872589
<ASSIGNED-SIC>2834
<IRS-NUMBER>133444607
<STATE-OF-INCORPORATION>NY
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC TO-C
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>777 OLD SAW MILL RIVER RD
<CITY>TARRYTOWN
<STATE>NY
<ZIP>10591-6707
<PHONE>9143477000
</BUSINESS-ADDRESS>
</FILED-BY>
<DOCUMENT>
<TYPE>SC TO-C
<SEQUENCE>1
<FILENAME>d15701_13e-4.htm
<TEXT>
<HTML>
<HEAD>
<TITLE>AutoCoded Document</TITLE>
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<A NAME="A002"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="3"><B>UNITED
STATES<BR>SECURITIES
AND EXCHANGE COMMISSION<BR><FONT SIZE="3">Washington,&nbsp;D.C.
20549</FONT></B></FONT></FONT></P>

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<A NAME="A005"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="3"><B>SCHEDULE&nbsp;TO<BR><FONT SIZE="2">(Rule
13e-4)</FONT></B></FONT></FONT></P>

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<A NAME="A007"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>TENDER
OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)<BR>OF
THE SECURITIES EXCHANGE ACT OF 1934<BR>(Amendment
No. )</B></FONT></FONT></P>

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<A NAME="A010"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Regeneron
Pharmaceuticals, Inc.</B><BR>(Name of Subject
Company (Issuer))</FONT></FONT></P>

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<A NAME="A012"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Regeneron
Pharmaceuticals, Inc.</B><BR>(Name of Filing
Person (Offeror))</FONT></FONT></P>

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<A NAME="A014"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Options
to Purchase Common Stock, Par Value $.001 Per Share<BR>granted under
the Company&#146;s 1990 Long-Term Incentive Plan<BR>and
2000 Long-Term Incentive Plan<BR>Having
an Exercise Price Per Share of $18.00 or More</B><BR>(Title of
Class of Securities)</FONT></FONT></P>

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<A NAME="A019"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>00075886F1</B><BR>(CUSIP Number
of Class of Securities)<BR>(Underlying
Common Stock)</FONT></FONT></P>

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<A NAME="A022"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Stuart
Kolinski, Esq.<BR>Vice
President, General Counsel and Secretary<BR>Regeneron
Pharmaceuticals, Inc.<BR>777
Old Saw Mill River Road<BR>Tarrytown,
New York 10591-6707<BR>(914)
347-7000</B><BR>(Name,
Address and Telephone Number of Person Authorized to<BR>Receive Notices and Communications on Behalf of Filing Person)</FONT></FONT></P>

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<A NAME="A029"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B><I>Copy to:</I></B></FONT></FONT></P>

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<A NAME="A030"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Kent
A. Coit<BR>Skadden, Arps, Slate, Meagher&nbsp;&amp; Flom LLP<BR>One
Beacon Street<BR>Boston, MA 02108<BR>Telephone:
(617)&nbsp;573-4800<BR>Facsimile: (617) 573-4822</B></FONT></FONT></P>





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<A NAME="A033"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>CALCULATION
OF FILING FEE</B></FONT></FONT></P>



<table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr align="center" valign="bottom">
    <td width="50%" style="border-top: double windowtext 3px; border-right: solid windowtext 1px; border-bottom: solid windowtext 1px"><font face="Times New Roman, Times, Serif"><font size="2"><br>
      Transaction Valuation*</font></font></td>
    <td style="border-top: double windowtext 3px; border-bottom: solid windowtext 1px"><font face="Times New Roman, Times, Serif"><font size="2">Amount of Filing
      Fee</font></font></td>
  </tr>
  <tr align="center" valign="bottom">
    <td height="30" style="border-bottom: double windowtext 3px; border-right: solid windowtext 1px"><font face="Times New Roman, Times, Serif"><font size="2"><br>
      Not applicable</font></font></td>
    <td style="border-bottom: double windowtext 3px"><font face="Times New Roman, Times, Serif"><font size="2">Not applicable</font></font></td>
  </tr>
</table><br>

<TABLE CELLPADDING="0" CELLSPACING="0">
  <TR VALIGN="TOP">
    <TD ALIGN="RIGHT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*</FONT></FONT></TD>
    <TD ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD> <P ALIGN="LEFT"><FONT size="2" FACE="Times New Roman, Times, serif">
        No filing fee is required because this filing contains only preliminary
        communications made before the commencement of a tender offer.</FONT>
      </P></TD>
  </TR>
  <TR VALIGN="TOP">
    <TD ALIGN="RIGHT">&nbsp;</TD>
    <TD ALIGN="LEFT">&nbsp;</TD>
    <TD><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></TD>
  </TR>
  <TR VALIGN="TOP">
    <TD height="30" ALIGN="RIGHT" valign="top"><font size="2" face="Wingdings">o</font></TD>
    <TD ALIGN="LEFT">&nbsp;</TD>
    <TD><font size="2" face="Times New Roman, Times, serif">Check the box if any
      part of the fee is offset as provided by Rule 0-11(a)(2) and identify the
      filing with which the offsetting fee was previously paid. Identify the previous
      filing by registration statement number, or the Form or Schedule and the
      date of its filing.</font></TD>
  </TR>
</TABLE><br>

<table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></td>
    <td width="50%"><font size="2" face="Times New Roman, Times, serif">Amount
      Previously Paid: Not applicable.</font></td>
    <td width="50%"><font size="2" face="Times New Roman, Times, serif">Filing
      Party: Not applicable.</font></td>
  </tr>
  <tr>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">Form or Registration
      No.: Not applicable.</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">Date Filed: Not applicable.</font></td>
  </tr>
</table><br>


<TABLE CELLPADDING="0" CELLSPACING="0">
  <TR VALIGN="TOP">
    <TD ALIGN="RIGHT"><font size="2" face="Times New Roman, Times, serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font size="2" face="Wingdings">x</font></TD>
    <TD ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD><font size="2" face="Times New Roman, Times, serif">Check the box if the filing
      relates solely to preliminary communications made before the commencement
      of a tender offer.</font></TD>
  </TR>
</TABLE><br>

<table width="100%" border="0" cellpadding="0" cellspacing="0">
  <tr>
    <td colspan="3" nowrap><font size="2" face="Times New Roman, Times, serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check
      the appropriate boxes below to designate any transactions to which the statement
      relates:</font></td>
  </tr>
  <tr>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font><font size="2" face="Wingdings">o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></td>
    <td width="100%"><font size="2" face="Times New Roman, Times, serif">third-party
      tender offer subject to Rule 14d-1.</font></td>
  </tr>
  <tr>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font><font size="2" face="Wingdings">x</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">issuer tender offer
      subject to Rule 13e-4.</font></td>
  </tr>
  <tr>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font><font size="2" face="Wingdings">o</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">going-private transaction
      subject to Rule 13e-3.</font></td>
  </tr>
  <tr>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">&nbsp;</font><font size="2" face="Wingdings">o</font></td>
    <td><font size="2" face="Times New Roman, Times, serif">amendment to Schedule
      13D under Rule 13d-2.</font></td>
  </tr>
</table>
<p><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check
  the following box if the filing is a final amendment reporting the results of
  the tender offer: <font size="2" face="Wingdings">o</font></FONT></FONT> </p>


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<A NAME="A036"></A>
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B><U>Explanatory
Note</U></B></FONT></FONT></P>

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<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">On
November 17, 2004, Regeneron Pharmaceuticals, Inc. (the &#147;Company&#148;)
filed with the Securities and Exchange Commission on Schedule 14A preliminary
forms of a letter to shareholders, Notice of Special Meeting of Shareholders and
Proxy Statement (collectively the &#147;Preliminary Proxy Materials&#148;) in
connection with a Special Meeting of Shareholders at which the Company&#146;s
shareholders will vote on a proposal to approve an amendment to the
Company&#146;s 2000 Long-Term Incentive Plan to expressly authorize an option
exchange program described in the Preliminary Proxy Materials (the &#147;Option
Exchange Program&#148;). The Preliminary Proxy Materials are attached as Exhibit
99.1 hereto.</FONT></FONT></P>

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<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">On
November 17, 2004, the Company disseminated to employees by e-mail a
communication from Ross Grossman, Vice President of Human Resources regarding the Option Exchange Program, which is attached as
Exhibit 99.2 hereto (the &#147;Employee Communication&#148;).</FONT></FONT></P>

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<A NAME="A037"></A>
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B><U>Additional
Information About the Option Exchange Program and Where to Find It</U></B></FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>None
of the above information, the Preliminary Proxy Materials nor the Employee
Communication constitutes an offer to holders of options to exchange their
options. At the time the Option Exchange Program is commenced, we will provide
eligible employees with written materials, including an Offer to Exchange,
explaining the precise terms, conditions and timing of, and procedures for
accepting, such offer, and will file those materials with the Securities and
Exchange Commission (SEC). Eligible employees should carefully read those
materials, when they become available, because they will contain important
information about the Option Exchange Program.</B></FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Free
copies of the Offer to Exchange and related materials (when they are available),
and any other materials filed by Regeneron Pharmaceuticals, Inc. with the SEC,
may be obtained free of charge at www.sec.gov and on our internet website
(www.regeneron.com) or by contacting our Investor Relations Department at 777 Old
Saw Mill River Road, Tarrytown, New York 10591.</B></FONT></FONT></P>




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<A NAME="A038"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Exhibit
Index</B></FONT></FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0">
  <TR VALIGN="TOP">
    <TD ALIGN="RIGHT" nowrap><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><U>Exhibit
      No.</U></FONT></FONT></TD>
    <TD ALIGN="LEFT">&nbsp;</TD>
    <TD>&nbsp;</TD>
  </TR>
  <TR VALIGN="TOP">
    <TD ALIGN="center" nowrap><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">99.1</FONT></FONT></TD>
    <TD ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">
        Preliminary forms of letter to shareholders, Notice of Special Meeting
        of Shareholders and Proxy Statement filed on Schedule 14A with the Securities
        and Exchange Commission on November 17, 2004.</FONT></FONT></P></TD>
  </TR>
  <TR VALIGN="TOP">
    <TD ALIGN="center" nowrap><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">99.2</FONT></FONT></TD>
    <TD ALIGN="LEFT">&nbsp;</TD>
    <TD>
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">
        Communication from Ross Grossman, Vice President of Human Resources to all employees sent on November 17, 2004.</FONT></FONT></P></TD>
  </TR>
</TABLE>


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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">4</FONT></FONT></P>


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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d15701_ex99-1.htm
<TEXT>
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<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>
<DIV ALIGN="CENTER"><IMG SRC="regeneronlogo.jpg">
<BR>&nbsp;</DIV>
</FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>777 Old Saw Mill River Road<BR> Tarrytown, New York 10591-6707</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 0 px; TOP-MARGIN: 12 px; TEXT-ALIGN: LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">November
&nbsp;&nbsp;, 2004</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Dear Fellow Shareholder:</FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">It is my pleasure to invite you to attend a Special
Meeting of Shareholders of Regeneron Pharmaceuticals, Inc. to be held on
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;,
December &nbsp;&nbsp;, 2004 at 10:30 in the morning at the Westchester Marriott Hotel, 670 White Plains Road, Tarrytown, New York
10591.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Notice of Special Meeting and proxy statement in
this mailing describes an option exchange program and related amendment to our 2000 Long-Term Incentive Plan expressly authorizing the program. Your
Board of Directors recommends that you vote in favor of the amendment expressly authorizing the option exchange program.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Your vote is important. Whether or not you plan to
attend the Special Meeting, you can cast your vote by completing the accompanying proxy and returning it in the enclosed prepaid envelope. If you
attend the Special Meeting, you may vote in person if you wish, even if you previously returned your proxy.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">I look forward to seeing you on December
&nbsp;&nbsp;, 2004.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="MARGIN-LEFT: 400px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Sincerely,</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="MARGIN-LEFT: 400px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">P. Roy Vagelos, M.D.<BR> <I>Chairman of the Board
of Directors</I></FONT></DIV></P>


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<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>REGENERON PHARMACEUTICALS, INC.<BR> 777 Old Saw Mill River Road<BR> Tarrytown,
New York 10591</B></FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><HR SIZE="1" WIDTH="96" ALIGN="center" NOSHADE COLOR="#000000"></B></FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>NOTICE OF SPECIAL MEETING OF SHAREHOLDERS</B></FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><HR SIZE="1" WIDTH="96" ALIGN="center" NOSHADE COLOR="#000000"></B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px; TOP-MARGIN: 12 px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Special Meeting of
Shareholders of Regeneron Pharmaceuticals, Inc., a New York corporation, will be held on
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;,
December &nbsp;&nbsp;, 2004, commencing at 10:30 a.m., at the Westchester Marriot Hotel, 670 White Plains Road, Tarrytown, New York, for the following
purposes:</FONT></DIV></P>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(1)&nbsp;&nbsp;&nbsp;&nbsp;</FONT></DIV></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">to amend the 2000 Long-Term Incentive Plan to expressly
authorize the Option Exchange Program described in this proxy statement; and</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(2)&nbsp;&nbsp;&nbsp;&nbsp;</FONT></DIV></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">to act upon such other matters as may properly come before the
meeting and any adjournment or postponement thereof.</FONT></TD>
</TR>
</TABLE>
<BR>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Board of Directors has fixed the close of
business on November 18, 2004 as the record date for determining shareholders entitled to notice of, and to vote at, the meeting and at any adjournment
or postponement thereof.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="MARGIN-LEFT: 400px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">As Authorized by the Board of
Directors,</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="MARGIN-LEFT: 400px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Stuart Kolinski<BR> <I>Vice President, General
Counsel and Secretary</I></FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">November , 2004</FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>IMPORTANT</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Your vote is important. Whether or not you plan
to attend the Special Meeting, please complete, sign, and date the accompanying proxy card and return it promptly in the enclosed postage-prepaid
envelope. If you attend the Special Meeting, you may vote in person if you wish, even if you have previously returned your proxy.</B></FONT></DIV></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>*&nbsp;&nbsp;*&nbsp;*&nbsp;*&nbsp;*</B></FONT></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Additional Information About the Option Exchange Program and Where to Find
It</I></B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>This proxy statement does not constitute an offer
to holders of options to exchange their options pursuant to the Option Exchange Program and the Offer to Exchange described in this proxy statement. At
the time the Offer to Exchange is commenced, we will provide eligible employees with written materials explaining the precise terms, conditions and
timing of, and procedures for accepting, such offer, and will file those materials with the Securities and Exchange Commission. Eligible employees
should carefully read those materials, when they become available, because they will contain important information about the Option Exchange Program.
These materials, when they are filed with the Securities and Exchange Commission, will be, and other materials filed by Regeneron Pharmaceuticals, Inc.
with the Securities and Exchange Commission are, available free of charge at www.sec.gov and on our internet website (www.regeneron.com) or by
contacting our Investor Relations Department at 777 Old Saw Mill River Road, Tarrytown, New York 10591.</B></FONT></DIV></P>


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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></DIV></P>


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<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>REGENERON PHARMACEUTICALS, INC.<BR> 777 Old Saw Mill River Road<BR> Tarrytown,
New York 10591</B></FONT></P>

<P ALIGN="RIGHT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">November &nbsp;&nbsp;, 2004</FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><HR SIZE="1" WIDTH="72" ALIGN="center" NOSHADE COLOR="#000000"></B></FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>PROXY STATEMENT</B></FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><HR SIZE="1" WIDTH="72" ALIGN="center" NOSHADE COLOR="#000000"></B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 0 px; TOP-MARGIN: 18 px; TEXT-ALIGN: LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>GENERAL
INFORMATION ABOUT THE SPECIAL MEETING<BR></B></FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Why are you receiving these proxy materials?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">We are providing these proxy materials to you
because Regeneron&#146;s Board of Directors is asking (technically called soliciting) holders of the Company&#146;s Common Stock and Class A Stock to
provide proxies to be voted at our Special Meeting of Shareholders. The Special Meeting is scheduled for December , 2004, commencing at 10:30 a.m., at
the Westchester Marriott Hotel, 670 White Plains Road, Tarrytown, New York 10591, and your proxy will be used at the Special Meeting or at any
adjournment or postponement of the meeting.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Who is entitled to vote at the Special Meeting?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Only shareholders of record at the close of business
on the record date, November 18, 2004, are entitled to vote at the Special Meeting shares of Common Stock and/or Class A Stock held on that date. As of
November 18, 2004, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;shares of Common Stock and
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;shares of Class A Stock were issued and outstanding. The Common Stock and the Class A Stock vote
together on all matters as a single class, with the Common Stock being entitled to one vote per share and the Class A Stock being entitled to ten votes
per share.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>What are you being asked to vote on?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">We are asking you to vote to approve an amendment to
the Company&#146;s 2000 Long-Term Incentive Plan (the &#147;2000 Plan&#148;) expressly authorizing the option exchange program described in this proxy
statement (the &#147;Option Exchange Program&#148;). The text of the proposed amendment is set forth as Appendix A to this proxy
statement.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>How can you vote?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">You may vote in person at the Special Meeting or by
proxy. We recommend you vote by proxy even if you plan to attend the meeting. You can always change your vote at the meeting.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">If you sign and return your proxy card to us in time
for it to be voted at the Special Meeting, one of the individuals named as your proxy, each of whom is a director of the Company, will vote your shares
as you have directed on the proxy card. If you sign and timely return your proxy card but no indication is given as to how to vote your shares as to
the proposal, your shares will be voted <B>FOR</B> the proposal. If any other matter properly comes before the Special Meeting, the persons named in
the proxy card will use their discretion as to how to vote the shares.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">If you plan to attend the Special Meeting and wish
to vote in person, we will give you a ballot at the meeting. However, if your shares are held in the name of your broker, bank or other nominee, you
must obtain from your nominee and bring to the Special Meeting a &#147;legal proxy&#148; authorizing you to vote your &#147;street name&#148; shares
held as of the record date.</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1<BR></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>How do you vote by proxy?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">You may vote by proxy by completing, signing, dating
and returning your proxy card in the enclosed envelope. If your shares are held in &#147;street name&#148; through a broker, bank or other nominee, you
must provide written instructions on how to vote your shares. In that case, as noted below under <B>&#147;What vote is required to approve the
proposal?&#148;</B>, if you do not properly provide such instructions how to vote your shares, your shares will not be voted on the proposal. To ensure
that your instructions are received in a timely manner, you should promptly complete, sign and send in the envelope enclosed with this proxy statement
the voting instruction form which is also enclosed. You may also wish to check the voting form used by the firm that holds your shares to see if it
offers telephone or internet voting.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Can you change your vote or revoke your proxy?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Yes. You may change your vote or revoke your proxy
at any time before the proxy is exercised. If you submitted your proxy by mail, you must (i) file with the Secretary of the Company or other designee
of the Company, at or before the taking of the vote at the Special Meeting, a written notice of revocation bearing a later date than the proxy you
previously submitted or (ii) duly execute a later dated proxy relating to the same shares and deliver it to the Secretary of the Company or other
designee before the taking of the vote at the Special Meeting. Attendance at the Special Meeting will not have the effect of revoking a proxy unless
you give written notice of revocation to the Secretary before the proxy is exercised or you vote by written ballot at the Special Meeting. If you hold
your shares through a broker, bank or other nominee in &#147;street name,&#148; you will need to contact them to revoke your proxy.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>What constitutes a quorum?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">A majority of the votes of the shares of Common
Stock and Class A Stock issued and outstanding and entitled to vote on the record date, taken together as a single class, present in person or by proxy
at the Special Meeting, will constitute a quorum for the transaction of business at the Special Meeting.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>What vote is required to approve the proposal?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The affirmative vote of a majority of the votes cast
in person or by proxy at the Special Meeting is required to approve the proposal to amend the 2000 Plan to expressly authorize the Option Exchange
Program. Broker non-votes, if any, and abstentions will have no effect on the outcome of the vote. Broker non-votes occur when shares held by a
shareholder in &#147;street name&#148; are not voted with respect to a proposal because the broker has not received voting instructions from the
shareholder, and the broker lacks the discretionary voting power to vote the shares. Brokers holding shares in their name will not be permitted to vote
on the proposal at the Special Meeting without instruction from the beneficial owner of the shares.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>What is the Board&#146;s recommendation?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Board recommends that you vote <B>FOR</B>
approval of the proposed amendment to the 2000 Plan to expressly authorize the Option Exchange Program.</FONT></DIV></P>



<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2<BR></FONT></P>

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<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>PROPOSAL NO. 1:<BR> AMENDMENT TO THE 2000 LONG-TERM INCENTIVE PLAN TO<BR>
EXPRESSLY AUTHORIZE THE OPTION EXCHANGE PROGRAM</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">After careful consideration, our board of directors
determined, upon the recommendation of its Compensation Committee, that it is in the best interest of the Company and its shareholders to implement,
and accordingly the board approved, the Option Exchange Program, subject to shareholder approval. To assure compliance with the rules of The Nasdaq
National Market and to afford shareholders the opportunity to vote on this important matter, our board of directors determined to submit for
shareholder approval an amendment to the 2000 Plan expressly authorizing the Option Exchange Program. The text of the proposed amendment is set forth
as Appendix A to this proxy statement.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">In order to implement the Option Exchange Program,
shortly after the date of the mailing of this proxy statement, we will commence an offer to eligible employees whereby, upon the terms and subject to
the conditions set forth in an Offer to Exchange and related materials to be filed with the Securities and Exchange Commission (such offer, upon such
terms and conditions, being referred to as the &#147;Offer to Exchange&#148;), eligible employees will be offered a one-time opportunity to exchange
their stock options granted under the 2000 Plan and the Company&#146;s 1990 Long-Term Incentive Plan (together with the 2000 Plan, the &#147;Stock
Incentive Plans&#148;) that have an exercise price of at least $18.00 per share for a lesser number of replacement options based on exchange ratios
described below. Each replacement option will have an exercise price equal to the fair market value (as determined under the 2000 Plan) of the Common
Stock on the replacement option grant date, which is expected to be the expiration date of the Offer to Exchange. The ratios of surrendered options to
replacement options are 1.5-to-1, 2-to-1, and 3-to-1, depending upon the original exercise price of the surrendered options. Each replacement option
will have a term equal to the greater of (1) the remaining term of the surrendered option it replaces and (2) six years from the date of grant of the
replacement option. Each replacement option granted to an employee other than our executive vice president and senior vice presidents will ordinarily
become vested and exercisable in equal annual installments on the first, second, third and fourth anniversaries of the grant date of the replacement
option. Each replacement option granted to our executive vice president and senior vice presidents will vest with respect to all the shares underlying
such option if <I>both</I> (i) the Company&#146;s products have achieved gross sales of at least $100 million during any consecutive
twelve-month period (either directly by the Company or through its licensees) <I>and</I> (2) the specific senior or executive vice president has
remained employed by the Company for at least three years from the date of grant. For all replacement options, the recipient&#146;s vesting and
exercise rights will be contingent on the recipient&#146;s continued employment through the applicable vesting dates and subject to the provisions of
the 2000 Plan and the applicable option agreement. Consummation of the Offer to Exchange will be, and accordingly the exchange of options pursuant to
the Option Exchange Program is, subject to shareholder approval of Proposal No. 1 and certain other conditions that will be set forth in the Offer to
Exchange. Our non-executive directors and our president and chief executive officer will not be eligible to participate in the Option Exchange
Program.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A
VOTE<B> FOR</B> APPROVAL OF THE AMENDMENT TO THE 2000 PLAN TO EXPRESSLY AUTHORIZE THE OPTION EXCHANGE PROGRAM.</FONT></DIV></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Option Exchange Program</B></FONT></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Background</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Stock options are generally intended to help align
the interests of a company&#146;s employees with the interests of the company&#146;s shareholders. Accordingly, a key objective of the Stock Incentive
Plans is to encourage ownership of the Company by personnel whose long-term employment and efforts are considered essential to the Company&#146;s
continued progress. The Compensation Committee of the board of directors, and the board, believe that the Stock Incentive Plans have proven to be
effective tools that</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">3<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>encourage stock option recipients to act in the
shareholders&#146; interest by enabling the option recipients to have an economic stake in the Company&#146;s success.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The price of our Common Stock has declined sharply
since 2000. As of November 3, 2004, approximately 54% of the outstanding options granted under the Stock Incentive Plans had an exercise price above
$18 per share. The per share exercise prices for the annual stock option grants for employees in the past four years have been $37.78 (in December
2000), $28.01 (in December 2001), $19.43 (in December 2002), and $13.00 (in December 2003). On November 3, 2004, the date as of which option values and
exchange ratios were determined for purposes of the Option Exchange Program, the closing price per share of Common Stock on the Nasdaq National Market
was $7.88. On November &nbsp;&nbsp;, 2004, the closing price per share of Common Stock on the Nasdaq National Market was
$&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;. The exercise prices noted above, as compared to current market values for the Common Stock, illustrate that a
substantial number of the outstanding options granted pursuant to the Stock Incentive Plans no longer serve as effective incentives to retain and
motivate employees. In today&#146;s competitive market for top talent in the pharmaceutical and biotechnology industries, the Compensation Committee of
the board of directors and the board believe that it is important for the future success of the Company, and thus for the enhancement of long-term
shareholder value, to revitalize the incentive value of our stock option program as part of our overall compensation program to retain, motivate and
reward employees.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">In addition, although these &#147;out of the
money&#148; options will, in all likelihood, not be exercised as long as the stock price for the Common Stock is lower than the applicable exercise
price, they will remain on the Company&#146;s books with the potential to dilute shareholders&#146; interests for up to 10 years from the grant date
unless they are cancelled. The Option Exchange Program is designed to reduce the number of outstanding options. As of November 3, 2004, there were
12,758,297 shares of Common Stock underlying options outstanding under the Stock Incentive Plans and 9,253,339 shares available for future grant of
awards under the 2000 Plan. Of the outstanding options as of November 3, 2004, options to purchase 4,847,581 shares of Common Stock will be eligible
for exchange under the proposed Option Exchange Program. If 100% of eligible options were to be exchanged and grants of replacement options were made
in accordance with the exchange ratios provided for in the Option Exchange Program, the number of shares of Common Stock underlying options outstanding
would be reduced by approximately 2,271,216 shares. The actual net reduction in shares of Common Stock underlying options outstanding will depend on the level of
participation in the Option Exchange Program. However, the shares underlying options which are surrendered pursuant to the Option Exchange Program will
be returned to the 2000 Plan and will be available for future grants of options or other awards under the 2000 Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Compensation Committee of the board of directors
and the board believe that, by realigning the exercise prices of employee options with current market values for the Common Stock, the Option
Exchange Program, if approved by shareholders, will enable the 2000 Plan to again become an important tool to help motivate the Company&#146;s
employees to create shareholder value, and by renewing vesting requirements on the replacement options, should result in increased incentives for
employees to remain with the Company and also reward employees for their continued dedication and loyalty. In addition, we believe that establishing
the performance vesting criterion for replacement options granted to our executive vice president and senior vice presidents under the Option Exchange
Program will serve as an important additional incentive to create shareholder value.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Details of the Option Exchange Program</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Implementing the Option Exchange
Program.</I></B>&nbsp;&nbsp;Upon the recommendation of the Compensation Committee of the board of directors, on November 15, 2004, the board approved
an amendment to the 2000 Plan to expressly authorize the Option Exchange Program, subject to shareholder approval. The text of the amendment is set
forth as Appendix A to this proxy statement. Shortly after the mailing of this proxy statement, the Company will commence, and will distribute to all
eligible employees appropriate materials in order to consider and accept, the Offer to Exchange. Eligible employees will have until the close of
business on the expiration date of the Offer to Exchange, which will be at least 20 business</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">4<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>days after commencement of the Offer to Exchange
(such expiration date, as it may be extended, the &#147;Expiration Date&#148;), to accept, and surrender eligible options in exchange for replacement
options in accordance with the terms, conditions and procedures set forth in, the Offer to Exchange. The Offer to Exchange will not be consummated, and
accordingly there will be no exchange of options under the Option Exchange Program and the Option Exchange Program will automatically terminate, if the
amendment to the 2000 Plan to expressly authorize the Option Exchange Program does not receive the requisite affirmative vote of shareholders at the
Special Meeting or any adjournment or postponement thereof. As of the Expiration Date, eligible options which have been properly surrendered pursuant
to the Offer to Exchange will be cancelled and replacement options will be granted having an exercise price equal to the fair market value of the Common Stock as of the
Expiration Date as determined under the 2000 Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><I>Voting in favor of this proposal at the Special
Meeting does not constitute an election to participate in the Option Exchange Program.</I></FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Eligibility; Election to
Participate.</I></B>&nbsp;&nbsp;The Option Exchange Program is open to Company regular employees who work at least 20 hours per week, other than our
non-executive employee director and our president and chief executive officer. Non-employee directors, consultants, former employees and retirees will
also not be eligible to participate in the Option Exchange Program. If on the Expiration Date, an optionee who was a Company regular employee on the
date the Offer to Exchange is commenced is no longer a Company regular employee for any reason, including retirement, termination, voluntary
resignation, layoff, death or disability, that optionee will not be eligible to participate in the Option Exchange Program. There are approximately 517
employees who currently are eligible to participate in the Option Exchange Program.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Option Exchange Program will afford eligible
employees the opportunity to make a one-time election to surrender options granted under the Stock Incentive Plans that have an exercise price per
share of at least $18.00 and exchange them for replacement options granted under the 2000 Plan, in accordance with the exchange ratios set forth below
and the other terms and conditions set forth in the Offer to Exchange. Participation in the Option Exchange Program is voluntary.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Exchange Ratios.</I></B>&nbsp;&nbsp;The
exchange ratios under the Option Exchange Program (that is, how many current options an employee must surrender in order to receive one replacement
option) were determined in a manner intended to provide for an exchange based approximately on fair values of options surrendered and replacement
options granted, using Black-Scholes models, with aggregate values favorable to shareholders. The Black-Scholes valuation methodology, a widely
recognized and accepted valuation model to determine the value of stock options, takes into account a number of variables, including current stock
price, stock volatility, risk-free rate of return, and the remaining term of the options being valued. In determining the exchange ratios, the
Compensation Committee and the board of directors considered the advice of Pearl Meyer &amp; Partners, a nationally recognized compensation consulting
firm, including advice with respect to option values and exchange ratios, and used information available as of the close of business on November 3,
2004 in determining the respective values and amounts of the variables utilized in the Black-Scholes model.</FONT></DIV></P>



<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">5<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The following table summarizes information related
to the options eligible for exchange in the Option Exchange Program:</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<TABLE ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="90%">
  <TR VALIGN="BOTTOM">
    <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Exercise
      Price of Eligible Options
      <HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT"  WIDTH="187pt">
      </FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares<BR>
      Underlying Eligible<BR>
      Options as<BR>
      of November 3, 2004
      <HR SIZE=1 NOSHADE COLOR="#000000">
      </FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Weighted Average<BR>
      Exercise Price<BR>
      of Eligible Options
      <HR SIZE=1
NOSHADE COLOR="#000000">
      </FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Remaining<BR>
      Weighted Average<BR>
      Life of Eligible<BR>
      Options (Years)
      <HR SIZE=1 NOSHADE COLOR="#000000">
      </FONT></TH>
  </TR>
  <TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
    <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">$18.00&nbsp;&#150;&nbsp;$28.00</FONT></TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2,188,294</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$21.28</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">7.46</FONT></TD>
  </TR>
  <TR VALIGN="BOTTOM">
    <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">$28.01&nbsp;&#150;&nbsp;$37.00</FONT></TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,386,437</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$28.78</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">6.97</FONT></TD>
  </TR>
  <TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
    <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$37.01
        and up</FONT></TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,272,850</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$40.43</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">5.96</FONT></TD>
  </TR>
  <TR VALIGN="BOTTOM">
    <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Total
        Number of Shares Underlying Options Eligible<BR>
        for Exchange</B></FONT></TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">4,847,581</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$28.46</FONT></TD>
    <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">6.93</FONT></TD>
  </TR>
</TABLE>
&nbsp;<BR>


<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Replacement option grants calculated according to
the exchange ratios will be rounded down to the nearest whole share on a grant-by-grant basis. Options will not be issued for fractional shares. The
exchange ratios are set forth below:</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<TABLE ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="90%">
  <TR VALIGN="BOTTOM">
     <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Exercise Price Range
<HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT" WIDTH="110pt"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Exchange Ratio<BR> (number of eligible options to be<BR>surrendered and
cancelled<BR>for each replacement option)<HR SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">$18.00&nbsp;&#150;&nbsp;$28.00</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>

    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1.50</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">$28.01&nbsp;&#150;&nbsp;$37.00</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>

    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2.00</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$37.01 and
up</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>

    <TD ALIGN="center" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">3.00</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
</TR>
</TABLE>
&nbsp;<BR>


<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Exercise Price of Replacement
Options.</I></B>&nbsp;&nbsp;Each replacement option will be granted with an exercise price equal to the fair market value of the Common Stock on the
date of grant of the replacement option (which will be the Expiration Date), as determined under the 2000 Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Vesting and Term of Replacement
Options.</I></B>&nbsp;&nbsp;Each replacement option will be completely unvested upon grant. Each replacement option granted to an employee other than
our executive vice president and senior vice presidents will ordinarily become vested and exercisable with respect to one-fourth (1/4<SUP>th</SUP>) of
the shares initially underlying such option on each of the first, second, third and fourth anniversaries of the grant date so that such replacement
option will be fully vested and exercisable four years after it is granted. Each replacement option granted to our executive vice president and senior
vice presidents will vest with respect to all the shares underlying such option if <I>both</I> (i) the Company&#146;s products have achieved
gross sales of at least $100 million during any consecutive twelve-month period (either directly by the Company or through its licensees)
<I>and</I> (2) the specific senior or executive vice president has remained employed by the Company for at least three years from the date of
grant. For all replacement options, the recipient&#146;s vesting and exercise rights will be contingent upon the recipient&#146;s continued employment
through the applicable vesting date and subject to the other terms of the 2000 Plan and the applicable option award agreement. As is generally the
case with respect to the option award agreements for options eligible for exchange pursuant to the Option Exchange Program, the option award agreements
for replacement options will include provisions whereby the replacement options may become fully vested in connection with a &#147;Change in
Control&#148; of the Company, as defined in the 2000 Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The term of an option is the length of time during
which it may be exercised. Under the Option Exchange Program, each replacement option will have a term equal to the greater of (1) the remaining term
of the surrendered option it replaces and (2) six years from the date of grant of the replacement option. This is intended to ensure that the employees
who participate in the Option Exchange Program will not derive any additional benefit from an extended option term unless the surrendered option has a
remaining term of less than six years.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Other Terms and Conditions of Replacement
Options.</I></B>&nbsp;&nbsp;The other terms and conditions of the replacement options will be set forth in an option agreement to be entered into as of
the grant date of the</FONT></DIV></P>


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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>replacement options, substantially in the form
of the standard option agreement to be filed with the Securities and Exchange Commission along with the Offer to Exchange, and will be governed by the
2000 Plan. If options surrendered under the Option Exchange Program qualified as incentive stock options under U.S. tax laws, then the replacement
options will also be incentive stock options to the fullest extent permitted under Section 422 of the Internal Revenue Code of 1986, as amended.
Otherwise, replacement options will be non-qualified stock options. The shares of Common Stock for which the replacement options will be exercisable
have already been registered under the Securities Act of 1933, as amended, as part of the Company&#146;s registration statements for the 2000
Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Accounting Treatment.</I></B>&nbsp;&nbsp;In
connection with the Option Exchange Program, the Company intends to adopt, effective January 1, 2005, the fair value based method of accounting for
stock-based employee compensation under the provisions of Statement of Financial Accounting Standards No. 123, <I>Accounting for Stock-Based
Compensation</I> (&#147;SFAS No. 123&#148;), as modified by Statement of Financial Accounting Standards No. 148, <I>Accounting for Stock Based
Compensation &#151; Transition and Disclosure</I> (&#147;SFAS No. 148&#148;), using the modified prospective method. In accordance with SFAS Nos.
123/148, upon the grant of a replacement option pursuant to the Option Exchange Program, the Company will incur compensation cost that will be
recognized over the vesting period of the replacement option. The compensation cost will equal the sum of (i) the unamortized fair value of the
surrendered options on the date of the exchange and (ii) the incremental value of the replacement option measured as the difference between (a) the
fair value of the replacement option on the date of the exchange and (b) the fair value of the surrendered options immediately prior to the exchange.
Due to a number of factors, including but not limited to our inability to predict how many option holders will exchange their options, which options
will be exchanged, the vesting date of any replacement option granted to our executive vice president and senior vice presidents, or what the future
market price of our Common Stock will be on the date of the grant of the replacement option or thereafter, we cannot predict the precise compensation cost that will
be recorded by the Company as a result of the Option Exchange Program. Assuming, solely as an example, that all eligible options are exchanged and
replacement options are granted at an exercise price equal to the fair market value (as calculated in accordance with the 2000 Plan) of the
Company&#146;s Common Stock as of November 3, 2004 and that replacement options granted to our executive vice president and senior vice presidents will
vest four years from the date of grant, under SFAS Nos. 123/148 the Company would incur compensation cost totaling approximately $13 million related to
the Option Exchange Program, which would be recognized as expense over the vesting period of the replacement options. We would begin recognizing this
compensation cost in the first quarter of 2005 in each of the categories of expense in the Company&#146;s Statement of Operations.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The adoption of SFAS Nos. 123/148 using the modified
prospective method does not require restatement of prior period data. The financial statement impact of SFAS No. 123 has been presented by the Company
in footnote disclosures in prior filings on Forms 10-K and 10-Q with the Securities and Exchange Commission. In addition, the Financial Accounting
Standards Boards (&#147;FASB&#148;) has proposed to modify SFAS No. 123, and issuance of the final standard is expected by the end of 2004. Therefore,
the Company may be required to adopt the FASB modification of SFAS No. 123 effective January 1, 2005 which could change the Company&#146;s compensation
cost of the Option Exchange Program calculated as described above.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>U.S. Federal Income Tax
Consequences.</I></B>&nbsp;&nbsp;The exchange of options pursuant to the Option Exchange Program should be treated as a non-taxable exchange and the
Company and the Company&#146;s shareholders and employees should recognize no income for U.S. federal income tax purposes upon the surrender of
eligible options and the grant of replacement options. Due to certain limitations on the extent to which options which become exercisable in a given
calendar year may be treated as incentive stock options, certain incentive stock options that are surrendered in the Option Exchange Program may be
replaced with non-qualified stock options. To the extent that this occurs, the Company may be entitled to a tax deduction upon the exercise of the
non-qualified stock options issued as replacement options which would not have been available to it to the extent the replacement option was an
incentive stock option. Additional tax information with respect to the replacement options will be provided to optionees in the</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">7<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>Offer to Exchange and, with respect to options
granted under the 2000 Plan, is provided in the summary plan description below. This information is a brief summary only and reference is made to the
Internal Revenue Code of 1986, as amended, and the regulations and interpretations issued thereunder, for a complete statement of all relevant federal
tax consequences.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Participation in the Option Exchange Program</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Because the decision whether to participate in the
Option Exchange Program is completely voluntary, we cannot predict which employees, if any, will participate, how many options any particular group of
employees will elect to exchange, nor the number of replacement options that may be granted. As noted above, our non-executive directors, our president
and chief executive officer, and non-employee service providers are not eligible to participate in the Option Exchange Program. Executive officers who
are eligible to participate hold collectively as a group 2,085,000 options which, if exchanged in full, would entitle them to 1,063,500 replacement
options. Of the outstanding options held by eligible employees as of November 3, 2004, the maximum number of shares of Common Stock underlying options
which could be exchanged is 4,847,581 and the maximum number of shares of Common Stock underlying the replacement options which could be issued in
accordance with the exchange ratios described above under &#147;Option Exchange Program&#151;Details of the Option Exchange Program&#151;Exchange
Ratios,&#148; would be 2,576,365.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Effect on Shareholders</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">To enhance long-term shareholder value we must
implement and maintain competitive employee compensation, incentive and retention programs. Stock options continue to be an important component of
these programs. The terms of the Option Exchange Program are intended to strike a balance between shareholder and employee interests. Using the
Black-Scholes model to calculate the value of the options that could be surrendered and the expected value of the replacement options, the exchange
ratios for the exchange of currently outstanding options for replacement options were established so that, on an aggregate basis, the value of the
surrendered options is expected to be greater than the value of the replacement options. The board of directors believes that the Option Exchange
Program should, on balance, be beneficial to shareholders because, if the Offer to Exchange is accepted with respect to a significant number of
currently outstanding options, the value of our stock option program as a means of rewarding, retaining and motivating our employees will be
substantially revitalized which, in turn, should result in increased shareholder value.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">In addition, to the extent option holders accept the
Offer to Exchange, there will be fewer shares of Common Stock subject to outstanding options held by such participants, and the potential dilution to
shareholders will be reduced. However, the shares underlying options originally granted under the Stock Incentive Plans which are surrendered pursuant
to the Option Exchange Program will be returned to the 2000 Plan and will be available for future grants of options and other awards under the 2000
Plan. In addition, while our non-executive directors and our president and chief executive officer are not eligible to participate in the Option
Exchange Program, these individuals and many employees eligible to participate in the Option Exchange Program are expected to receive year-end stock
option grants.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Notwithstanding the view of the Compensation
Committee and the board of directors that the Option Exchange Program should, on balance, be beneficial to shareholders, we cannot predict the precise
economic impact the Option Exchange Program will have on shareholders because we cannot predict how many option holders will exchange their options,
which options will be exchanged, what the future market price of the Common Stock will be on the date of the grant of replacement options or thereafter
or the precise compensation cost that will be recorded by the Company as a result of the Option Exchange Program. If all options eligible for exchange
are exchanged under the Option Exchange Program, a total of 2,576,365 replacement options will be issued. Assuming, solely as an example, that all
eligible options are exchanged and replacement options are granted at an exercise price equal to the fair market value (as calculated in accordance
with the 2000 Plan) of the Company&#146;s Common Stock as of November 3, 2004 and that replacement options granted to our executive vice president and
senior vice presidents will vest four years from the date of grant,</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">8<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>under SFAS Nos. 123/148 the Company would incur
compensation cost totaling approximately $13 million relating to the Option
Exchange Program, which would be recognized as expense over the
vesting period of the replacement options. We would begin recognizing this
compensation cost in the first quarter of 2005 in each of the categories of
expense in the Company&#146;s Statement of Operations.</FONT></DIV></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>The 2000 Long-Term Incentive Plan</B></FONT></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Description of the Material Terms of the 2000 Plan</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>General.</I></B>&nbsp;&nbsp;The Company
adopted the 2000 Plan effective June 9, 2000 and the 2000 Plan has been subsequently amended to increase the total number of shares of Common Stock
available for issuance under the plan to an aggregate of (i) 18,500,000 plus (ii) shares previously reserved for issuance under the Company&#146;s 1990
Long-Term Incentive Plan but which remained unissued as of June 14, 2002 and any shares of Common Stock underlying awards granted under such plan which
are forfeited, expire or cancelled without delivery of shares of Common Stock. In addition, the 2000 Plan was amended to adjust the date of award of
the automatic grants of options made to non-employee directors.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">As of November 3, 2004, 9,253,339 shares remained
available for issuance under the 2000 Plan and 9,390,229 of shares were subject to outstanding awards (including options eligible to participate in the
Option Exchange Program). The 2000 Plan is scheduled to remain in effect until the close of business on April 24, 2010, unless earlier terminated by
the board of directors. Awards granted under the 2000 Plan (including awards that are issued under the Option Exchange Program) may remain in effect
following the expiration of the term of the plan in accordance with the award terms. Currently, all regular employees and directors are eligible to
receive grants under the 2000 Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Administration.</I></B>&nbsp;&nbsp;The 2000
Plan is administered by the Compensation Committee of the Board of Directors. Each member of the Compensation Committee is a &#147;non-employee
director&#148; (within the meaning of Rule 16b-3 promulgated under Section 16 of the Securities Exchange Act of 1934, as amended) and an &#147;outside
director&#148; (within the meaning of Section 162(m) of the Internal Revenue Code of 1986, as amended). In general, awards granted under the 2000 Plan
become exercisable or otherwise vest at the times and upon the conditions that the Compensation Committee may determine, as reflected in the applicable
award agreement. The Compensation Committee has the authority to accelerate the vesting and/or exercisability of any outstanding award at such times
and under such circumstances as it, in its sole discretion, deems appropriate (for instance, upon a &#147;Change in Control&#148; of the Company, as
defined in the 2000 Plan). Awards under the 2000 Plan (other than annual grants to non-employee directors described under &#147;Non-employee Director
Awards&#148; below) are generally made in the discretion of the Compensation Committee. Consequently, except as described in the New Plan Benefits
table set forth below (which contains information regarding replacement options that are anticipated to be awarded in connection with the Option
Exchange Program), the recipients and size of future awards under the 2000 Plan are not presently determinable.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Types of Awards.</I></B>&nbsp;&nbsp;There are
generally four types of awards that may be granted under the 2000 Plan: Stock options (including both incentive stock options (referred to as ISOs)
within the meaning of Section 422 of the Internal Revenue Code of 1986, as amended and nonqualified stock options (referred to as NQSOs), which are
options that do not qualify as ISOs), Restricted Stock, Phantom Stock, and Stock Bonus awards. In addition, the Compensation Committee in its
discretion may make other awards valued in whole or in part by reference to, or otherwise based on, Common Stock.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Adjustment of Shares; Certain
Restrictions.</I></B>&nbsp;&nbsp;All of the shares reserved for issuance under the 2000 Plan are generally subject to equitable adjustment upon the
occurrence of any stock dividend or other distribution, recapitalization, stock split, reorganization, merger, consolidation, combination, repurchase
or share exchange, or other similar corporate transaction or event. The maximum number of shares of Common Stock that may be the subject of awards
to a participant in any year is 1,000,000, except that such number is 1,500,000 with respect to an employee&#146;s initial year of employment with the
Company.</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">9<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Stock Options.</I></B>&nbsp;&nbsp;Options
entitle the holder to purchase shares of Common Stock during a specified period at a purchase price specified by the Compensation Committee (but in the
case of an ISO, at a price not less than 100% of the fair market value of the Common Stock on the day the ISO is granted). Each option granted under
the 2000 Plan may be exercisable for a maximum period of 10 years from the date of grant. Options may be exercised, in whole or in part, by the payment
of cash of the full option price of the shares purchased, by tendering shares of Common Stock with a fair market value equal to the option price of the
shares purchased, or by other methods in the discretion of the Compensation Committee. The 2000 Plan provides that, unless otherwise determined by the
Compensation Committee, an option shall vest with respect to 20% of the option on the first anniversary of the date of grant and with respect to an
additional 20% on each of the next four anniversaries thereof. In 2001, the Compensation Committee determined that, beginning in 2001, options granted
under the 2000 Plan would vest ratably over four years, with 25% of the option vesting on each of the first four anniversaries of the date of grant.
Options which are granted pursuant to the Option Exchange Program, other than options granted to our executive vice president and senior vice
presidents, shall also vest ratably over a four year period, with 25% of the option vesting on each of the first four anniversaries of the date of
grant. Each replacement option granted to our executive vice president and senior vice presidents will vest with respect to all the shares underlying
such option if <i>both</i> (i) the Company&#146;s products have achieved gross sales of at least $100 million during any consecutive
twelve-month period (either directly by the Company or through its licensees) <i>and</i> (2) the specific senior or executive vice president has
remained employed by the Company for at least three years from the date of grant. Options that are exercisable as of the date of a participant&#146;s
termination of service with the Company may be exercised after such date for the period set forth in the option agreement or as otherwise determined by
the Compensation Committee. In the event of the death of a participant, any unexercised options held by such participant are exercisable in accordance
with their terms by the participant&#146;s heirs or personal representatives. Options held by a participant upon termination from the Company&#146;s
service for cause immediately expire (whether or not then exercisable). The Compensation Committee may provide that a participant who delivers shares
of Common Stock to exercise an option will automatically be granted new options for the number of shares delivered to exercise the option (referred to
as Reload Options). Reload Options will be subject to the same terms and conditions as the related option (except that the exercise price generally
will be the fair market value of the Common Stock on the date the Reload Option is granted). Options with reload rights that are surrendered in the
Option Exchange Program will be replaced with options which also have such reload rights.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Restricted
Stock.</I></B>&nbsp;&nbsp;Restricted Stock awards under the 2000 Plan consist of a grant of shares of restricted Common Stock. The Compensation
Committee may determine the price, if any, to be paid by a participant for each share of Restricted Stock subject to an award. A holder of Restricted
Stock may vote and, if the participant remains in the service of the Company throughout the &#147;Restricted Period&#148; as defined in the 2000 Plan,
he or she may generally receive all dividends on all such shares. However, such holder may not transfer such shares during the Restricted Period. If
for any reason during the Restricted Period a holder of Restricted Stock ceases to be in the service of the Company, the holder may (and if the
termination is on account of cause, shall) be required to transfer to the Company such Restricted Stock together with any dividends paid thereon.
Consistent with Section 162(m) of the Internal Revenue Code, the 2000 Plan provides that (i) restrictions on Restricted Stock may, in the sole
discretion of the Compensation Committee, lapse upon the achievement of certain pre-established performance goals and (ii) the maximum number of such
performance-based Restricted Stock awards that may be granted to an employee in any year is 200,000.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Performance Criteria.</I></B>&nbsp;&nbsp;The
2000 Plan provides that performance goals will be based on one or more of the following criteria: (1) return on total shareholder equity; (2) earnings
per share of Common Stock; (3) net income (before or after taxes); (4) earnings before interest, taxes, depreciation and amortization; (5) revenues;
(6) return on assets; (7) market share; (8) cost reduction goals; (9) any combination of, or a specified increase in, any of the foregoing; (10) the
achievement of certain target levels of discovery and/or development of products, including without limitation, the regulatory approval of new
products; (11) the achievement of certain target levels of sales of new products or licensing
in or out of new drugs; (12) the formation of joint ventures, research or development collaborations, or the completion of other corporate
transactions; and (13) such other criteria as the shareholders of the Company may approve. In</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">10<BR></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">addition, such performance goals may be based upon the
attainment of specified levels of Company performance under one or more of the measures described above relative to the performance of other
corporations. To the extent permitted under Section 162(m) of the Internal Revenue Code of 1986, as amended (including, without limitation, compliance
with any requirements for shareholder approval), the Compensation Committee may designate additional business criteria on which the performance goals
may be based or adjust, modify, or amend the aforementioned business criteria.</FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Phantom Stock.</I></B>&nbsp;&nbsp;A Phantom
Stock award is an award of the right to receive cash or Common Stock at a future date, subject to such restrictions, if any, as the Compensation
Committee may impose at the date of grant or thereafter, which restrictions may lapse separately or in combination at such times, under such
circumstances (including without limitation a specified period of employment or the satisfaction of the performance goals described above), in such
installments, or otherwise, as the Compensation Committee may determine. The grant of a Phantom Stock award payable solely in cash shall not reduce the
number of shares of Common Stock with respect to which awards may be granted under the 2000 Plan.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Stock Bonus.</I></B>&nbsp;&nbsp;If the
Compensation Committee grants a Stock Bonus award, a certificate for the shares of Common Stock constituting such Stock Bonus is issued in the name of
the participant to whom such grant was made.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Non-employee Director
Awards.</I></B>&nbsp;&nbsp;On the first business day after January 1 of each calendar year, each then serving non-employee director of the Company is
granted a NQSO to purchase 15,000 shares of Common Stock at the fair market value of such shares at the time of grant; such NQSOs become exercisable as
to 33-1/3% of the shares covered thereby on each of the first, second, and third anniversaries of the date of grant, and expire (if not earlier
terminated) on the tenth anniversary of the date of grant. In addition, a non-employee director may receive such other awards as are approved by a
majority of the Board.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Other Information.</I></B>&nbsp;&nbsp;The 2000
Plan may be amended by the Board of Directors, subject to shareholder approval where necessary to satisfy certain legal and regulatory requirements.
The closing price of the Common Stock on November 3, 2004 as quoted by the Nasdaq National Market was $7.88.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Certain Federal Income Tax Consequences</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Set forth below is a discussion of certain federal
income tax consequences with respect to Options that may be granted pursuant to the 2000 Plan. The following discussion is a brief summary only, and
reference is made to the Internal Revenue Code of 1986, as amended and the regulations and interpretations issued thereunder for a complete statement
of all relevant federal tax consequences. This summary is not intended to be exhaustive and does not describe state, local, or foreign tax consequences
of participation in the 2000 Plan or in the Option Exchange Program.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Incentive Stock Options.</I></B>&nbsp;&nbsp;In
general, no taxable income is realized by a participant upon the grant of an ISO. If shares of Common Stock are issued to a participant (&#147;Option
Shares&#148;) pursuant to the exercise of an ISO granted under the 2000 Plan and the participant does not dispose of the Option Shares within the
two-year period after the date of grant or within one year after the receipt of such Option Shares by the participant (a &#147;disqualifying
disposition&#148;), then, generally (i) the participant will not realize ordinary income upon exercise and (ii) upon sale of such Option Shares, any
amount realized in excess of the exercise price paid for the Option Shares will be taxed to such participant as capital gain (or loss). The amount by
which the fair market value of the Common Stock on the exercise date of an ISO exceeds the purchase price generally will constitute an item which
increases the participant&#146;s &#147;alternative minimum taxable income.&#148; If Option Shares acquired upon the exercise of an ISO are disposed of
in a disqualifying disposition, the participant generally would include in ordinary income in the year of disposition an amount equal to the excess of
the fair market value of the Option Shares at the time of exercise (or, if less, the amount realized on the disposition of the Option Shares), over the
exercise price paid for the Option Shares. Subject to certain exceptions, an ISO generally will not be treated as an ISO if it is
exercised more than three months following termination of employment. If an ISO is exercised at a time when it no longer qualifies as an ISO, such
option will be treated for tax purposes as an NQSO as discussed below.</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">11<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B><I>Nonqualified Stock
Options.</I></B>&nbsp;&nbsp;In general, no taxable income is realized by a participant upon the grant of an NQSO. Upon exercise of an NQSO, the
participant generally would include in ordinary income at the time of exercise an amount equal to the excess, if any, of the fair market value of the
Option Shares at the time of exercise over the exercise price paid for the Option Shares. In the event of a subsequent sale of Option Shares received
upon the exercise of an NQSO, any appreciation or depreciation after the date on which taxable income is realized by the participant in respect of the
option exercise will be taxed as capital gain in an amount equal to the excess of the sale proceeds for the Option Shares over the participant&#146;s
basis in such Option Shares. The participant&#146;s basis in the Option Shares will generally equal the amount paid for the Option Shares plus the
amount included in ordinary income by the participant upon exercise of the NQSO described in the immediately preceding paragraph.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>New Plan Benefits</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The following table sets forth information regarding
the benefits with respect to the options which certain participants and classes of participants in the 2000 Plan are expected to receive under the 2000
Plan pursuant to their participation in the Option Exchange Program. As noted above, awards under the 2000 Plan are made at the discretion of the
Compensation Committee and thus are not generally determinable in advance.</FONT></DIV></P>


<TABLE ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">

<TR VALIGN="BOTTOM">
     <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Name and Position
<HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT" WIDTH="93.5pt"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares Subject to Replacement Options<BR> Expected to Be
Granted Pursuant to Option<BR> Exchange Program (1)<HR SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Leonard S.
Schleifer, M.D., Ph.D.<BR> President and Chief Executive Officer</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Not
Eligible to Participate in Option Exchange Program</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">George D.
Yancopoulos, M.D., Ph.D.<BR> Executive Vice President, Chief Scientific Officer and President, Regeneron Research Laboratories</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">701,000</FONT></DIV></TD>
</TR>
<TR>
<TD>&nbsp;</TD></TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Murray A.
Goldberg<BR> Senior Vice President, Finance &amp; Administration, Chief Financial Officer, Treasurer and Assistant Secretary</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">78,333</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Randall G.
Rupp, Ph.D.<BR> Senior Vice President, Manufacturing and<BR> Process Sciences</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">58,333</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Neil Stahl,
Ph.D.<BR> Senior Vice President, Preclinical Development and Biomolecular Science</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">133,334</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Executive
Group (7 persons)</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">1,063,500 (6 persons eligible to participate)</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Non-Executive
Director Group</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Not
Eligible to Participate in Option Exchange Program</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="45%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Non-Executive
Officer Employee Group<BR> (511 persons)</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="LEFT" WIDTH="40%" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">1,512,864</FONT></DIV></TD>
</TR>
</TABLE>
&nbsp;<BR>


<HR SIZE="1" WIDTH="60" ALIGN="left" NOSHADE COLOR="#000000">

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(1)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Assumes all eligible employees participate in the Option
Exchange Program with respect to all of their eligible options. The aggregate number of options that will be required to be surrendered in order for
the above-noted groups to receive the number of replacement options pursuant to the Option Exchange Program as set forth in the table are as follows: Executive
Group&#151;2,085,000; Non-Executive Officer Employee Group&#151;2,762,581.</FONT></TD>
</TR>
</TABLE>
<BR>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">12<BR></FONT></P>

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<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">As the table above indicates, Leonard S. Schleifer,
M.D., Ph.D., our president and chief executive officer, and our non-executive directors, are not eligible to participate in the Option Exchange
Program. However, these individuals and the other executive officers named in that table are expected to receive new annual grants of
options in December 2004 or January 2005.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Options Previously Received Under the 2000 Plan</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The following table sets forth information regarding
options that have been granted to the participants and classes of participants set forth in the table pursuant to the 2000 Plan:</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<TABLE ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">

<TR VALIGN="BOTTOM">
     <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Name and Position
<HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT" WIDTH="93.5pt"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares Subject<BR> to Options Previously Granted<BR> Pursuant
to the 2000 Plan<HR SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Leonard S.
Schleifer, M.D., Ph.D.<BR> President and Chief Executive Officer</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">950,000</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">George D.
Yancopoulos, M.D., Ph.D.<BR> Executive Vice President, Chief Scientific Officer and President, Regeneron Research Laboratories</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">1,337,000</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Murray A.
Goldberg<BR> Senior Vice President, Finance &amp; Administration, Chief Financial Officer, Treasurer and Assistant Secretary</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">225,000</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Randall G.
Rupp, Ph.D.<BR> Senior Vice President, Manufacturing and Process Sciences</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">160,000</FONT></DIV></TD>
</TR>
<TR>
<TD>&nbsp;</TD></TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Neil Stahl,
Ph.D.<BR> Senior Vice President, Preclinical Development and Biomolecular Science</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">350,000</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All Current
Executive Officers as a Group</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">3,317,000</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All Current
Directors who are not Executive Officers<BR> as a Group</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">1,617,500</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Each
Associate of any Director or Executive Officer</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">100,000</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Each Person
who has Received 5% or more of the Options Issued Under the 2000 Plan</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">3,474,500</FONT></DIV></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All Employees
(including Non-Executive Officers) as a Group</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD ALIGN="CENTER" COLSPAN="3"><DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">4,455,729</FONT></DIV></TD>
</TR>
</TABLE>
&nbsp;<BR>




<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">13<BR></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Equity Compensation Plan Information</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The following table shows information with respect
to securities authorized for issuance under the equity compensation plans maintained by the Company as of December 31, 2003.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<TABLE WIDTH="100%" BORDER="0" ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0">
  <TR VALIGN="BOTTOM">
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1"><BR>
      &nbsp;</FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">(a)<BR>
      &nbsp;</FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">(b)<BR>
      &nbsp;</FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">(c)<BR>
      &nbsp;</FONT></TH>
  </TR>
  <TR VALIGN="BOTTOM">
    <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Plan
      Category
      <HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT" WIDTH="71.5pt">
      </FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
    <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number
      of<BR>
      securities to be issued<BR>
      upon exercise of<BR>
      outstanding options,<BR>
      warrants and rights
      <HR SIZE=1 NOSHADE COLOR="#000000">
      </FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Weighted-average<BR>
      exercise price of<BR>
      outstanding options,<BR>
      warrants and rights
      <HR SIZE=1 NOSHADE COLOR="#000000">
      </FONT></TH>
    <TH nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>
    <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number
      of securities<BR>
      remaining available for<BR>
      future issuance under<BR>
      equity compensation plans<BR>
      (excluding securities<BR>
      reflected in column (a))
      <HR SIZE=1 NOSHADE COLOR="#000000">
      </FONT></TH>
  </TR>
  <TR VALIGN="TOP" BGCOLOR="#FFF3CE">
    <TD WIDTH="100%" ALIGN="LEFT">
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Equity
        Compensation plans approved by security holders (1)</FONT></DIV></TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD COLSPAN="3" ALIGN="center" nowrap>
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">13,113,299 shares<br>
        of Common Stock</FONT></DIV></TD>
    <TD nowrap>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" nowrap ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$20.38</FONT></TD>
    <TD nowrap>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD COLSPAN="3" ALIGN="LEFT" nowrap>
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">1,653,642 shares of<br>
        Common Stock (3)</FONT></DIV></TD>
  </TR>
  <TR VALIGN="TOP">
    <TD ALIGN="LEFT">
<DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Equity
        compensation plans not approved by security holders (2)</FONT></DIV></TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD COLSPAN="3" ALIGN="center" nowrap>
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">0<BR>
        </FONT></DIV></TD>
    <TD nowrap>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" nowrap ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$&nbsp;&nbsp;0.00</FONT></TD>
    <TD nowrap>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD COLSPAN="3" ALIGN="LEFT" nowrap>
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">44,246 shares of<BR>
        Class A Stock</FONT></DIV></TD>
  </TR>
  <TR VALIGN="TOP" BGCOLOR="#FFF3CE">
    <TD ALIGN="LEFT">
<DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">Total</FONT></DIV></TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD COLSPAN="3" ALIGN="center" nowrap>
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">13,113,299 shares<br>
        of Common Stock</FONT></DIV></TD>
    <TD nowrap>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD ALIGN="center" nowrap ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">$20.38</FONT></TD>
    <TD nowrap>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
    <TD COLSPAN="3" ALIGN="LEFT" nowrap>
      <DIV STYLE="MARGIN-LEFT: 0px; TEXT-INDENT: 0px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">1,697,888 shares of<br>
        Common Stock and<br>
        Class A Stock</FONT></DIV></TD>
  </TR>
</TABLE>
&nbsp;<BR>


<HR SIZE="1" WIDTH="60" ALIGN="left" NOSHADE COLOR="#000000">

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(1)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The equity compensation plans approved by the security holders
are the 2000 Plan and the Company&#146;s 1990 Long-Term Incentive Plan.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(2)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The equity compensation plan not approved by the security
holders is the Executive Stock Purchase Plan which is described in note 12(b) to the Company&#146;s audited financial statements for the year ended
December 31, 2003.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(3)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">There is no restriction on the number of shares that may be
issued under the 2000 Plan in the form of Restricted Stock.</FONT></TD>
</TR>
</TABLE>
<BR>



<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">14<BR></FONT></P>

<HR NOSHADE SIZE="5">
<!-- END DIVISION: DIV_proxy PAGE POSITION: 18 -->
<PAGE>
<BR>
<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 19 -->

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>STOCK OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AS OF NOVEMBER 3,
2004</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Set forth below is the name, address, and stock
ownership of each person or group of persons known by the Company to own beneficially more than 5% of the outstanding shares of Common Stock and Class
A Stock as of November 3, 2004.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<TABLE ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">

<TR VALIGN="BOTTOM">
     <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Name and Address of Beneficial Owner
<HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT"  WIDTH="198pt"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares of<BR> Class A Stock<BR> Beneficially Owned (1)<HR
SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares<BR> of Common Stock<BR> Beneficially Owned (1)<HR
SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Percentage of<BR> Common Stock and Class A<BR> Stock Beneficially Owned
(2)<HR SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 13px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Leonard S.
Schleifer, M.D., Ph.D.<BR> c/o Regeneron, Inc.<BR> 777 Old Saw Mill River Road<BR> Tarrytown, NY 10591</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,769,340</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(3)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,138,877</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(4)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">5.1</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 13px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Novartis
Pharma AG<BR> Lichstrasse 35<BR> CH-4002 Basel, Switzerland</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">7,527,050</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(5)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">13.5</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 13px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">FMR Corp.<BR>
82 Devonshire Street<BR> Boston, Massachusetts 02109</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">6,381,228</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(6)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">11.4</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 13px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Kedge Capital
Funds<BR> Limited, Special Situations 1 Fund<BR> Lord Coutanche House<BR> 66-68 Esplanade<BR> St. Helier<BR> Jersey (channel Islands<BR> JE4
5YQ</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">4,000,000</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(7)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">7.2</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 13px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Amgen
Inc.<BR> One Amgen Center Drive<BR> Thousand Oaks, California 91320</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">3,181,309</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(8)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">5.7</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 13px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Aventis
Pharmaceuticals Inc.<BR> 300 Somerset Corporate Boulevard<BR> Bridgewater, New Jersey 08807</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2,799,552</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(9)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">5.0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
</TABLE>
&nbsp;<BR>


<HR SIZE="1" WIDTH="60" ALIGN="left" NOSHADE COLOR="#000000">

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(1)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">We calculated beneficial ownership in accordance with the rules
of the Security and Exchange Commission. The calculation includes shares subject to options held by the person or entity in question that are
exercisable currently or with in sixty days of November 3, 2004.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(2)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">To calculate percentage, number of shares outstanding includes
55,741,696 shares of Common Stock outstanding as of November 3, 2004, plus any shares subject to options held by the person or entity in question that
are currently exercisable or exercisable within sixty days after November 3, 2004.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(3)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 58,550 shares of Class A Stock held directly by, or in
trust for the benefit of, Dr. Schleifer&#146;s two sons, of which Dr. Schleifer disclaims beneficial ownership. Excludes 6,500 shares of Class A Stock
held by the Schleifer Family Foundation, a charitable foundation, of which Dr. Schleifer disclaims beneficial ownership.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(4)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 1,025,380 shares of Common Stock purchasable upon the
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 2,293
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan. Includes 1,800 shares of Common Stock held directly by, or in
trust for the benefit of, Dr. Schleifer&#146;s two sons, of which Dr. Schleifer disclaims beneficial ownership. Excludes</FONT></TD>
</TR>
</TABLE>
<BR>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">15<BR></FONT></P>

<HR NOSHADE SIZE="5">
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<PAGE>
<BR>
<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 20 -->

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">10,000 shares of Common Stock held by the Schleifer Family Foundation, a
charitable foundation, of which Dr. Schleifer disclaims beneficial ownership.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(5)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Based on Schedule 13G filed by Novartis Pharma AG with the
Securities and Exchange Commission on April 8, 2003.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(6)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Based on Schedule 13G/A filed by FMR Corp. with the Securities
and Exchange Commission on February 14, 2004.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(7)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Based on Schedule 13G/A filed by Kedge Capital Funds Limited
Special Situations 1 Fund with the Securities and Exchange Commission on February 13, 2004.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(8)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Based on Schedule 13G/A filed by Amgen Inc. with the Securities
and Exchange Commission on May 5, 2004.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="17px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(9)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Based on Schedule 13G filed by Aventis Pharmaceuticals Inc. with
the Securities and Exchange Commission on September 12, 2003.</FONT></TD>
</TR>
</TABLE>
<BR>



<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">16<BR></FONT></P>

<HR NOSHADE SIZE="5">
<!-- END DIVISION: DIV_proxy PAGE POSITION: 20 -->
<PAGE>
<BR>
<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 21 -->

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>SECURITY OWNERSHIP OF MANAGEMENT</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The following table sets forth, as of November 3,
2004, the number of shares of Common Stock and Class A Stock beneficially owned by each of our directors, each of our named executive officers, who
include our Chief Executive Officer, Leonard S. Schleifer, and the four most highly compensated executive officers other than our Chief Executive
Officer, and all directors and executive officers as a group, and the percentage that such shares represent of the total combined number of shares of
outstanding Common Stock and Class A Stock, based upon information obtained from such persons.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Management and Directors Stock Ownership Table as of November 3,
2004</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<TABLE ALIGN="CENTER" CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">

<TR VALIGN="BOTTOM">
     <TH nowrap ALIGN="LEFT" ><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Name and Address of Beneficial Owner (1)
<HR SIZE=1 NOSHADE COLOR="#000000" ALIGN="LEFT"  WIDTH="220pt"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;</FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares<BR> of Class A Stock<BR> Beneficially Owned (2, 3)<HR
SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Number of Shares<BR> of Common Stock<BR> Beneficially Owned (2, 3)<HR
SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
     <TH><FONT FACE="Times New Roman, Times, Serif" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TH>

     <TH COLSPAN="3" nowrap><FONT FACE="Times New Roman, Times, Serif" SIZE="1">Percentage of Common<BR> Stock and Class A Stock<BR> Beneficially Owned
(4)<HR SIZE=1 NOSHADE COLOR="#000000"></FONT></TH>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Leonard S.
Schleifer, M.D., Ph.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,769,340</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(5)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,138,877</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(10)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">5.1</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">P. Roy Vagelos,
M.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2,499,509</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(11)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">4.4</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Charles A.
Baker</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">62,384</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(6)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">110,590</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(12)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Michael S.
Brown, M.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">58,049</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(7)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">148,258</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(13)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Alfred G.
Gilman, M.D., Ph.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">76,237</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">168,975</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(14)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Joseph L.
Goldstein, M.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">52,000</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">135,000</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(15)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Arthur F.
Ryan</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">13,334</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(15)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Eric M.
Shooter, Ph.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">79,911</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(8)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">100,000</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(15)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">George L.
Sing</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">172,772</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(16)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">George D.
Yancopoulos, M.D., Ph.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">42,750</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(9)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1,319,084</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(17)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2.4</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Murray A.
Goldberg</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">276,108</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(18)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Randall G.
Rupp, Ph.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">215,391</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(19)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM" BGCOLOR="#FFF3CE">
     <TD ALIGN="LEFT" WIDTH="100%"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Neil Stahl,
Ph.D.</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">0</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">355,482</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF"
SIZE="2">(20)&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
     <TD ALIGN="LEFT" WIDTH="100%"><DIV STYLE="MARGIN-LEFT: 10px; TEXT-INDENT: -10px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All Directors
and Executive Officers<BR> as a Group (15 persons)</FONT></DIV></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2,140,671</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">6,900,692</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;</FONT></TD>
     <TD WIDTH=3%>&nbsp;&nbsp;&nbsp;&nbsp;</TD>

     <TD WIDTH=5% ALIGN="RIGHT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
     <TD ALIGN="RIGHT" ><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">14.7</FONT></TD>
     <TD WIDTH=5% ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">%&nbsp;&nbsp;</FONT></TD>
</TR>
</TABLE>
&nbsp;<BR>


<HR SIZE="1" WIDTH="60" ALIGN="left" NOSHADE COLOR="#000000">

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">*</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Represents less than 1%</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(1)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Unless otherwise stated, the address for each beneficial owner
is c/o Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(2)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">We calculated beneficial ownership in accordance with the rules
of the Securities and Exchange Commission. The inclusion herein of any Class A Stock or Common Stock, as the case may be, deemed beneficially owned
does not constitute an admission of beneficial ownership of those shares. Unless otherwise indicated, each person listed has sole voting and investment
power with respect to the shares listed.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(3)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Number of shares includes number of options held by the person
or entity in question that are currently exercisable or excisable within 60 days after November 3, 2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(4)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">To calculate percentage, number of shares outstanding includes
55,741,696 shares outstanding as of November 3, 2004 plus any shares subject to options held by the person or entity in question that are currently
exercisable or exercisable within sixty days after November 3, 2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(5)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 58,550 shares of Class A Stock held directly by, or in
trust for the benefit of, Dr. Schleifer&#146;s two sons, of which Dr. Schleifer disclaims beneficial ownership. Excludes 6,500 shares of Class A Stock
held by the Schleifer Family Foundation, a charitable foundation, of which Dr. Schleifer disclaims beneficial ownership.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(6)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All shares of Class A Stock are held by a limited
partnership.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(7)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 2,700 shares of Class A stock held in trust for the
benefit of Dr. Brown&#146;s daughter.</FONT></TD>
</TR>
</TABLE>
<BR>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">17<BR></FONT></P>

<HR NOSHADE SIZE="5">
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<PAGE>
<BR>
<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 22 -->

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(8)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All shares of Class A Stock are held in trust for the benefit of
Dr. Shooter&#146;s children (the Shooter Family Trust).</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(9)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 19,383 shares of Class A Stock held in trust for the
benefit of Dr. Yancopoulos&#146;s children and excludes 205 shares held by Dr. Yancopoulos&#146;s wife. Dr. Yancopoulos disclaims beneficial ownership
of all such shares.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(10)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 1,025,380 shares of Common Stock purchasable upon the
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 2,293
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan. Includes 1,800 shares of Common Stock held directly by, or in
trust for the benefit of, Dr. Schleifer&#146;s two sons, of which Dr. Schleifer disclaims beneficial ownership. Excludes 10,000 shares of Common Stock
held by the Schleifer Family Foundation, a charitable foundation, of which Dr. Schleifer disclaims beneficial ownership.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(11)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 1,514,999 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 851
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan. Includes 527,322 shares of Common Stock held in a charitable
trust and 456,337 shares of Common Stock held in three separate grantor trusts. Excludes 203,199 shares of Common Stock held by the Marianthi
Foundation, and 161,443 shares of Common Stock held by the Pindaros Foundation, both charitable foundations, of which Dr. Vagelos disclaims beneficial
ownership.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(12)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 110,000 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3,
2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(13)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 143,000 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3,
2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(14)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 145,000 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3,
2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(15)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">All shares of Common Stock beneficially owned represent shares
of Common Stock purchasable upon the exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty
days from November 3, 2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(16)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 100,000 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3,
2004.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(17)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 1,255,200 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 2,266
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(18)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 246,781 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 2,293
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(19)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 204,000 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 2,248
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan.</FONT></TD>
</TR>
</TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="21px" ALIGN="LEFT" nowrap><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">(20)</FONT></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Includes 340,000 shares of Common Stock purchasable upon
exercise of options granted pursuant to the Stock Incentive Plans which are exercisable or become so within sixty days from November 3, 2004 and 2,211
shares of Common Stock held in an account under the Company&#146;s 401(k) Savings Plan.</FONT></TD>
</TR>
</TABLE>
<BR>



<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">18<BR></FONT></P>

<HR NOSHADE SIZE="5">
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<PAGE>
<BR>
<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 23 -->

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>OTHER MATTERS</B></FONT></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>When are shareholder proposals due for the 2005 Annual Meeting of
Shareholders?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Pursuant to the rules of the Securities and Exchange
Commission, a shareholder wishing to present a proposal at the 2005 Annual Meeting of Shareholders must submit the proposal in writing and be received
by the Company at its principal executive offices at 777 Old Saw Mill River Road, Tarrytown, New York 10591 by January 6, 2005 in order for such
proposal to be considered for inclusion in the Company&#146;s proxy statement and form of proxy relating to that meeting.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Under our By-Laws, proposals of shareholders
intended to be submitted for a formal vote (other than proposals to be included in our proxy statement) at the annual meeting of shareholders to be
held in 2005 may be made only by a shareholder of record who has given notice of the proposal to the Secretary of the Company at our principal
executive offices no earlier than 90 days and no later than 60 days prior to the meeting; provided that if less than 70 days notice or public
disclosure of the date of the annual meeting is given or made to shareholders, notice by the shareholder in order to be timely must be received not
less than the close of business on the tenth (10<SUP>th</SUP>) day following the day on which such notice of the annual meeting was first mailed or
such public disclosure of the annual meeting was made, whichever first occurs. The notice must contain certain information as specified in our By-Laws.
Assuming our 2005 Annual Meeting will be held on June 10, 2005 in accordance with the Company&#146;s past practice, notice of such proposals would need
to be given no earlier than March 12, 2005 and no later than April 11, 2005. Any proposal received outside of such dates will not be considered
&#147;timely&#148; under the federal proxy rules for purposes of determining whether we may use discretionary authority to vote on such
proposal.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>What happens if multiple shareholders share an address?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">Applicable rules permit brokerage firms and the
Company to send one Notice of Special Meeting and proxy statement to multiple shareholders who share the same address under certain circumstances. This
practice is known as &#147;householding.&#148; We believe that householding will provide greater convenience for our shareholders, as well as cost
savings for us by reducing the number of duplicate documents that are sent to your home. Consequently, we have implemented the practice of householding
for shares held in &#147;street name&#148; and intend to deliver only one Notice of Special Meeting and proxy statement to multiple shareholders
sharing the same address. If you wish to receive a separate proxy statement for the Special Meeting, you may find these materials at our internet
website (www.regeneron.com) or you may stop householding for your account and receive separate printed copies of these materials by contacting our
Investor Relations Department, at Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, or by calling us at
914-345-7741 and these materials will be promptly delivered to you. If you hold shares registered in your name (sometimes called a shareholder of
record), you can elect householding for your account by contacting us in the same manner described above or marking the &#147;YES&#148; box on the
enclosed proxy card under the &#147;Householding Election&#148; heading. <B>Please note that for shareholders of record, if you do not mark the
&#147;NO&#148; box on the enclosed proxy card under the &#147;Householding Election&#148; heading, you will be deemed to have consented, and
householding will start for your account within 60 days after the mailing of this proxy statement.</B> Any shareholder may stop householding for your
account by contacting our Investor Relations Department at the address and/or phone number included above. If you revoke your consent, you will be
removed from the householding program within 30 days of receipt of your revocation and each shareholder at your address will receive individual copies
of our disclosure documents.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Are there any other matters to be addressed at the Special
Meeting?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">We know of no matters, other than the proposal to
amend the 2000 Plan to expressly authorize the Option Exchange Program, that may be properly presented at the Special Meeting. If any other matter is
properly presented at the Special Meeting upon which a vote may properly be taken, shares represented</FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">19<BR></FONT></P>

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<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 24 -->

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><BR>by duly executed and timely returned proxy cards
will be voted on any such matter in accordance with the judgment of the named proxies.</FONT></DIV></P>

<P ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Who will pay the costs related to this proxy statement and the Special
Meeting?</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The solicitation of proxies is being made on behalf
of the Company and we will be responsible for paying for all expenses to prepare, print and mail the proxy materials to shareholders. We have engaged
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;to assist in soliciting proxies for a fee of approximately &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; plus
reimbursable out-of-pocket expenses. In addition to the solicitation by use of the mails, our officers, directors, and employees may solicit the return
of proxies by telephone, telegram, or personal interviews. In accordance with the regulations of the Securities and Exchange Commission, we will make
arrangements with brokerage houses and other custodians, nominees, and fiduciaries to send proxies and proxy materials to their principals and will
reimburse them for their reasonable expenses in so doing.</FONT></DIV></P>



<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">20<BR></FONT></P>

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<BR>
<!-- BEGIN DIVISION: DIV_proxy PAGE POSITION: 25 -->


<P ALIGN="RIGHT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>Appendix A<BR></B></FONT></P>

<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"><B>AMENDMENT NO. 4<BR> TO THE<BR> REGENERON PHARMACEUTICALS, INC.<BR> 2000
LONG-TERM INCENTIVE PLAN</B></FONT></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">WHEREAS, the Regeneron Pharmaceuticals, Inc. 2000
Long-Term Incentive Plan (the &#147;Plan&#148;) was adopted by Regeneron Pharmaceuticals, Inc. (the &#147;Company&#148;) on April 24, 2000 and became
effective as of such date pursuant to the approval of the Company&#146;s shareholders; and</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">WHEREAS, pursuant to Section 19 of the Plan, the
Board of Directors of the Company (the &#147;Board&#148;) is authorized to amend the Plan; and</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">WHEREAS, after considering the recommendation of the
Compensation Committee and such other factors as the Board deemed relevant, the Board has determined that an option exchange program upon substantially
the terms and conditions described in the preliminary proxy statement to be filed with the Securities and Exchange Commission (such program, with such
changes to such terms and conditions as the authorized officers of the Company determine to be necessary or appropriate, as conclusively evidenced by
the terms and conditions of such program described in the definitive proxy statement, including any amendment or supplement thereto, to be distributed
to the Company&#146;s shareholders in connection with the Special Meeting of Shareholders referred to below, being referred to hereinafter as the
&#147;Option Exchange Program&#148;) in connection with a proposed special meeting of the Company&#146;s shareholders to be convened to vote on the
amendment to the Plan set forth below (the &#147;Special Meeting of Shareholders&#148;) is in the best interests of the Company and its shareholders;
and</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">WHEREAS, the Board has determined that it is
appropriate to amend the Plan in the manner set forth in paragraph 1 below (the &#147;Amendment&#148;).</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">NOW THEREFORE, the Plan is hereby amended as set
forth immediately below, subject, however, to the approval of this Amendment by the Company&#146;s shareholders at the Special Meeting of Shareholders,
or any postponement or adjournment thereof, and provided that if this Amendment is not so approved by the Company&#146;s shareholders, this Amendment
shall be void <I>ab initio.</I></FONT></DIV></P>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="37px" ALIGN="LEFT" nowrap><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">1.</FONT></DIV></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Plan is hereby amended to expressly authorize the Option
Exchange Program.</FONT></TD>
</TR>
</TABLE>
<BR>

<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0" WIDTH="100%">
<TR VALIGN="TOP">
     <TD WIDTH="37px" ALIGN="LEFT" nowrap><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">2.</FONT></DIV></TD>
     <TD WIDTH="3px" ALIGN="LEFT">&nbsp;</TD>
     <TD WIDTH="100%" ALIGN="LEFT"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">The Plan is hereby ratified and confirmed in all other
respects.</FONT></TD>
</TR>
</TABLE>
<BR>

<P ALIGN="LEFT"><DIV STYLE="TEXT-INDENT: 20px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">IN WITNESS WHEREOF, this Amendment No. 4 has been
duly executed by an authorized officer of the Company as of the 15<SUP>th</SUP> day of November, 2004.</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="MARGIN-LEFT: 400px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">REGENERON PHARMACEUTICALS, INC.<BR>
<DIV ALIGN="LEFT"><IMG SRC="stuart_kolinski-sig.jpg"><BR>Name: Stuart Kolinski<BR> Title: Vice President
&amp; General Counsel</DIV>
</FONT></DIV></P>

<P ALIGN="LEFT"><DIV STYLE="MARGIN-LEFT: 400px"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2"></FONT></DIV></P>


<P ALIGN="CENTER"><FONT FACE="TIMES NEW ROMAN, TIMES, SERIF" SIZE="2">A-1<BR></FONT></P>

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<!-- MARKER FORMAT-SHEET="Center Head Not Bold" -->
<A NAME="A002"></A>
<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">E-MAIL
COMMUNICATION FROM ROSS<BR>GROSSMAN,
VICE PRESIDENT OF HUMAN<BR>RESOURCES, TO
ALL EMPLOYEES, SENT ON<BR>NOVEMBER 17,
2004</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para" -->
<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Over
the last several months, Regeneron management and the Compensation Committee of
the Board of Directors have worked together to evaluate the Company&#146;s
long-term incentive compensation programs. Following this evaluation, the
Compensation Committee recommended, and the Board of Directors approved, subject
to shareholder approval, a Stock Option Exchange Program which would provide an
opportunity for eligible employees who hold stock options with a per share
exercise price of at least $18 to exchange those options for a lesser number of
replacement stock options based on the exchange ratios described below. The
replacement stock options would have a per share exercise price equal to the
fair market value of Regeneron Common Stock on the date that the replacement
options are granted. That date will be at least twenty business days after the
Company formally commences an Offer to Exchange to implement the Stock Option
Exchange Program.</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para" -->
<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">The
Company has filed preliminary proxy materials with the Securities and Exchange
Commission (the SEC) relating to the proposal to have shareholders approve this
program. You can read the full proxy statement in its preliminary form on our
website <U>(www.regeneron.com</U>) under the Investor Relations page. The
proposal is expected to be voted on by Regeneron&#146;s shareholders at a
special shareholder meeting that will be scheduled once the timing of our
mailing of definitive proxy materials is known. Since that timing will depend on
the duration of any SEC review process, we cannot predict now when the special
shareholder meeting will be convened. However, we hope to be able to hold the
meeting in December 2004 or January 2005. If the shareholders approve the
exchange program, we would expect to grant replacement options under the program
in January 2005 with an exercise price equal to the fair market value of
Regeneron Common Stock on the grant date. This program was proposed because we
and the Board of Directors recognize that the talent and dedicated efforts of
our employees are critical to the Company&#146;s long-term success, and stock
options have proven to be an effective tool to retain, motivate, and reward
employees.</FONT></FONT></P>

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<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Regeneron
has not commenced the Stock Option Exchange Program referred to both in this
e-mail and the preliminary proxy materials referred to above. When we commence
the exchange program, we will distribute to each eligible employee appropriate
materials describing the program in detail in order to help you decide whether
you want to participate in the exchange program. Eligible option holders should
read these written materials carefully because they will contain important
information about the program. The Stock Option Exchange Program will remain
open for at least twenty business days and, of course, will be contingent upon
the approval of the shareholders at the special shareholders&#146; meeting and
other terms and conditions.</FONT></FONT></P>





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<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">I
know that, as you think about the Stock Option Exchange Program, you will have
many questions. Following the commencement of the exchange program, we plan to
communicate further in writing and at meetings in Tarrytown and Rensselaer. At
this point, however, we want to provide answers to some of your likely
questions:</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">How do
I participate in the exchange program?</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">We
have not commenced the exchange program. Once the exchange program is commenced,
eligible employees will receive additional information, including an Offer to
Exchange, which will set forth the procedures for tendering your options and
participating in the exchange program.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Who
will be eligible for the exchange program if shareholders approve it?</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Regular
Regeneron employees, other than the Chief Executive Officer, who work an average
of at least 20 hours per week and who are actively employed by the Company on
the date the Offer to Exchange expires will be eligible to participate in the
exchange once it is commenced. Participation in the exchange program will be
subject to the conditions specified in the Offer to Exchange, including
obtaining shareholder approval. Employees who meet the eligibility requirements
at the commencement of the exchange program but do not satisfy these
requirements on the expiration date will not be eligible to exchange their
options. The expiration date of the Offer to Exchange is currently expected to
be some time in January 2005, but it could change. Of course, if on the
expiration date you are not actively at work because of illness, vacation,
short-term leave, or other similar reasons, that will not disqualify you from
participating in the program.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">What
if the shareholders do not approve the exchange program?</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">The
exchange program is contingent upon the approval of the shareholders at the
special meeting of shareholders. If the shareholders do not approve the exchange
program and you previously elected to participate in the program, that election
will have no effect and your old stock options will continue under their
existing terms and conditions.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">If
I have options that are eligible for exchange, do I have to exchange them for
replacement options?</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">No.
The program is completely voluntary. Once the program is commenced, and assuming
shareholder approval of the program, you may exchange all of your eligible
options, some grants but not others, or no options. However, if you choose to
exchange options from a particular grant, you must exchange all options in that
grant.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Will I
receive one option for every option I exchange?</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">No.
Options will be exchanged according to exchange ratios that are intended to
reflect the lower value of the existing eligible options, which have per share
exercise prices</FONT></FONT></P>



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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">2</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">above the
current stock price of Regeneron&#146;s Common Stock,  and the higher value of the
replacement options, which will have a per share  exercise price equal to the fair market
value of Regeneron&#146;s Common Stock  on the date of the grant of the replacement
options. Since options with a lower  exercise price have a higher value than similar
options with higher exercise  prices, the higher the exercise price of the options
exchanged, the fewer  replacement options you will receive. The exchange ratios (that is,
how many old  options you need to surrender to get one replacement option) for options
with  various exercise prices are shown in the following table.</FONT></FONT></P>


<table border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">Exercise Price</font></td>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">Exchange Ratio
      (# of existing eligible options/# of replacement options)</font></td>
  </tr>
  <tr>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">$18.00-$28.00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></td>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">1.5 to 1</font></td>
  </tr>
  <tr>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">$28.01-$37.00</font></td>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">2 to 1</font></td>
  </tr>
  <tr>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">Above $37</font></td>
    <td nowrap><font size="2" face="Times New Roman, Times, serif">3 to 1</font></td>
  </tr>
</table>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Will
my replacement options have the same vesting schedule as the options I exchange?</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">No.
All replacement options issued in the exchange program, including replacement
options exchanged for old, fully vested options, will have a new vesting period.
Replacement options for employees other than the Senior and Executive Vice
Presidents will vest in equal installments over four years (i.e., 25% on each of
the first, second, third, and fourth anniversaries of the replacement options
grant date). Replacement options for the Senior and Executive Vice Presidents
will vest the first time the Company records twelve-month worldwide gross sales
of Company products of at least $100 million, but no earlier than three years
from the grant date. Of course, vesting for all replacement options will be
subject to the option holder&#146;s continued employment on the applicable
vesting date.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Will
the replacement options have a 10 year life?</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">No.
Replacement options generally will have the same life as the life remaining on
the exchanged option you turn in. However, if the life remaining on the options
you turn in as part of the exchange is less than 6 years, the term of the
replacement option will be 6 years. For example, if you exchange options granted
in January 2001, which expire in December 2011, your new replacement option
issued in January 2005 will also expire in December 2011. On the other hand, if
you exchange options granted in January 2000, which expire in January 2010, your
new replacement options issued in January 2005 will expire in January 2011
(i.e., 6 years from the date of grant of the replacement options).</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">I
currently have incentive stock options. Will my new options be incentive stock
options?</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">If you
surrender incentive stock options for exchange, the replacement options you
receive will be incentive stock options to the extent permitted by IRS rules.
Otherwise, the replacement options will be non-qualified stock options.</FONT></FONT></P>



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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">3</FONT></FONT> </P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">If I
elect to exchange options, will the exchange itself subject me to any income
taxes?</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">No.  The
exchange of options under the exchange program should be treated as a non-taxable
exchange.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">When
will I know the exercise price of my replacement option grants?</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">The
exercise price of the replacement options will equal the fair market value of
Regeneron Common Stock on the expiration date of the exchange program. The fair
market value is calculated as the average of the high and low share price on
that date.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">How do
I know if I am eligible to participate? How do I find out how many eligible
options I have and what their exercise prices are?</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">We
will provide you with this information when we commence the option exchange
program. You can at any time confirm what options you have, their grant dates,
exercise prices, vesting dates, and other information by going to
<U>www.optionslink.com &lt;http://www.optionslink.com/</U>&gt;. Employees who do
not have their optionslink password should send an email to
<U>optionslink@etrade.com &lt;mailto:optionslink@etrade.com</U>&gt; and request
their Regeneron logon information. You may also call 1-800-838-0908, press 0 to
speak to a customer service agent, and ask for your Regeneron logon information.</FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">What
will happen if I do nothing in response to the exchange offer?</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">Nothing
will change. All of your current stock options will continue to be valid and
will continue to vest with continued service. Their exercise price, vesting
schedule, and other terms will not change.</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para" -->
<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">While
many of you may have additional questions at this time, we ask that you please
not contact Human Resources with questions about the exchange program until you
have had the opportunity to read the written materials that will be sent to your
attention concerning the Stock Option Exchange Program, including the Offer to
Exchange. In addition, we plan to schedule meetings in Tarrytown and Rensselaer
to review the exchange program once it is commenced.</FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Center Cutoff Line" -->
<P ALIGN=CENTER>*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*</P>

<!-- MARKER FORMAT-SHEET="Left Head Bold" -->
<A NAME="A006"></A>
<P ALIGN="LEFT">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Additional
Information About the Stock Option Exchange Program and Where to Find It</B></FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>This
does not constitute an offer to holders of options to exchange their options. At
the time the Stock Option Exchange Program is commenced, we will provide
eligible</B></FONT></FONT></P>


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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">4</FONT></FONT></P>


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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>employees with
written materials, including an Offer to Exchange, explaining the precise terms,
conditions and timing of, and procedures for accepting, such offer, and will file those
materials with the Securities and Exchange Commission (the SEC). Eligible employees
should carefully read those materials, when they become available, because they will
contain important information about the Stock Option Exchange Program.</B></FONT></FONT></P>

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<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>The
exchange of options contemplated by the Stock Option Exchange Program is also
subject to shareholder approval of an amendment to our 2000 Long-Term Incentive
Plan to expressly authorize the program. In connection with seeking such
shareholder approval at a special meeting of shareholders to be convened as soon
as practicable, on November 17, 2004 we filed with the SEC preliminary forms of,
and expect to file with the SEC definitive forms of, a proxy statement and other
relevant materials. Shareholders should carefully read the applicable proxy
statement and other relevant materials, when they become available, because they
contain or will contain important information concerning the Stock Option
Exchange Program and the proposed amendment to our 2000 Long-Term Incentive Plan
to expressly authorize the program. Regeneron Pharmaceuticals, Inc. and its
directors, executive officers, and certain of its employees may be deemed to be
participants in the solicitation of proxies from our shareholders with respect
to approval of such proposed amendment. Information regarding the names,
affiliations, and interests of the participants in the solicitation is included
in the preliminary form of, and will be included in the definitive form of, the
proxy statement filed or to be filed with the SEC.</B></FONT></FONT></P>

<!-- MARKER FORMAT-SHEET="Para Flush" -->
<P ALIGN="LEFT"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2"><B>Free
copies of the preliminary proxy statement, and the definitive proxy statement,
the Offer to Exchange and related materials (when they are available), and any
other materials filed by Regeneron Pharmaceuticals, Inc. with the SEC, may be
obtained at the SEC&#146;s website at <U>http://www.sec.gov</U> or from
Regeneron at our website <U>www.regeneron.com</U>, or by directing a request to
our Investor Relations Department at 777 Old Saw Mill River Road, Tarrytown, New
York 10591.</B></FONT></FONT></P>

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<P ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif"><FONT SIZE="2">5</FONT></FONT> </P>





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