<SUBMISSION>
<ACCESSION-NUMBER>0000950134-07-019939
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20070912
<ITEMS>2.01
<ITEMS>9.01
<FILING-DATE>20070913
<DATE-OF-FILING-DATE-CHANGE>20070913
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>F5 NETWORKS INC
<CIK>0001048695
<ASSIGNED-SIC>3576
<IRS-NUMBER>911714307
<STATE-OF-INCORPORATION>WA
<FISCAL-YEAR-END>0930
</COMPANY-DATA>
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<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>000-26041
<FILM-NUMBER>071115673
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>401 ELLIOT AVE WEST
<STREET2>STE 500
<CITY>SEATTLE
<STATE>WA
<ZIP>98119
<PHONE>2062725555
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>401 ELLIOT AVE WEST
<STREET2>STE 500
<CITY>SEATTLE
<STATE>WA
<ZIP>98119
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>F5 LABS INC
<DATE-CHANGED>19990305
</FORMER-COMPANY>
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<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>v33753e8vk.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML>
<HEAD>
<TITLE>e8vk</TITLE>
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<BODY bgcolor="#FFFFFF">
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>






<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>Form&nbsp;8-K</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>CURRENT REPORT</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>Pursuant to Section&nbsp;13 or 15(d) of<BR>
the Securities Exchange Act of 1934</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>September&nbsp;12, 2007<BR>
Date of Report (Date of earliest event reported)</B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>F5 Networks, Inc.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of registrant as specified in its charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Washington</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>000-26041</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>91-1714307</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other jurisdiction <BR>
of incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Commission<BR>
File Number)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer<BR>
Identification No.)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>401 Elliott Avenue West<BR>
Seattle, WA 98119</B><BR>
(Address of Principal Executive Offices) (Zip Code)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>(206)&nbsp;272-5555</B><BR>
(Registrant&#146;s telephone number, including area code)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>N/A</B><BR>
(Former Name or Former Address, if changed since Last Report)
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check the appropriate box below if the Form 8-K filing is intended to simultaneously
satisfy the filing obligation of the registrant under any of the following provisions (<I>see </I>General
Instruction A.2. below):
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule&nbsp;14d-2(b) under the Exchange Act (17
CFR 240.14d-2(b))
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule&nbsp;13e-4(c) under the Exchange Act (17
CFR 240.13e-4(c))
</DIV>

<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





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<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
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	<TD width="76%"></TD>
</TR>
<TR><TD></TD><TD colspan="8"><A HREF="#000">Item&nbsp;2.01 Completion of Acquisition or Disposition of Assets.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#001">Item&nbsp;9.01. Financial Statements and Exhibits.</A></TD></TR>
<TR><TD colspan="9"><A HREF="#002">SIGNATURE</A></TD></TR>
<TR><TD colspan="9"><A HREF="v33753exv99w1.htm">EXHIBIT 99.1</A></TD></TR>
</TABLE>
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<!-- link2 "Item&nbsp;2.01 Completion of Acquisition or Disposition of Assets." -->
<DIV align="left"><A NAME="000"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;2.01 Completion of Acquisition or Disposition of Assets.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On September&nbsp;12, 2007, F5 Networks, Inc. (&#147;F5 Networks&#148;) completed its previously announced
acquisition of Acopia Networks, Inc. (&#147;Acopia&#148;), a privately held Delaware corporation that
provides high-performance, intelligent file virtualization solutions. The acquisition was made
pursuant to an Agreement and Plan of Merger, dated August&nbsp;6, 2007, by and among F5 Networks,
Checkmate Acquisition Corporation, a wholly-owned subsidiary of F5 Networks, Acopia, and the
stockholders&#146; representative referred to therein (the &#147;Merger Agreement&#148;). Under the terms of the
Merger Agreement, Checkmate Acquisition Corporation merged with and into Acopia with Acopia
surviving the merger as a wholly-owned subsidiary of F5 Networks. Upon consummation of the
acquisition, F5 Networks assumed Acopia&#146;s stock option plan and all Acopia unvested in-the-money
stock options that were outstanding immediately prior to closing. Holders of the assumed Acopia
unvested in-the-money stock options will have the right to purchase F5 Networks common stock upon
exercise of such stock options. The aggregate purchase price payable to the former Acopia
stockholders and holders of vested in-the-money Acopia stock options was $210,000,000 in cash, less
$2,476,857 transaction fees incurred by Acopia. $21,000,000 of the aggregate merger consideration
will be held in escrow to secure claims by F5 Networks for indemnification under the Merger
Agreement. Prior to the closing of the Merger, there were no material relationships between or
among F5 Networks or any of its affiliates, officers or directors on the one hand, and Acopia or
any of its affiliates, officers or directors on the other.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The foregoing description of the Merger Agreement is qualified in its entirety by reference to
the full text of the Merger Agreement, which was included as Exhibit&nbsp;2.1 to the Current Report on
Form 8-K filed on August&nbsp;8, 2007. A copy of the press release issued by F5 Networks on September
12, 2007 regarding the closing of this acquisition is filed herewith as Exhibit&nbsp;99.1.
</DIV>
<!-- link2 "Item&nbsp;9.01. Financial Statements and Exhibits." -->
<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9.01. Financial Statements and Exhibits.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>(a)&nbsp;Financial statements of businesses acquired.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;F5 Networks will file financial statements of Acopia under cover of Form 8-K no later than 71
days after the date this Report is required to be filed.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>(b)&nbsp;Pro forma financial information.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;F5 Networks will file pro forma financial information with respect to its acquisition of
Acopia under cover of Form 8-K no later than 71 calendar days after the date this Report is
required to be filed.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>(c)&nbsp;Not applicable.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>(d)&nbsp;Exhibits.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;99.1 Press release announcing closing of acquisition
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "SIGNATURE" -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="48%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="46%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="left">F5 NETWORKS, INC.</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="left">(Registrant)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">By:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Jeffrey A. Christianson</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Jeffrey A. Christianson</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sr. Vice President and General Counsel</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Dated: September&nbsp;13, 2007</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="8%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit No.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Description</TD>
</TR>

<!-- End Table Head -->
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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press release announcing closing of acquisition</TD>
</TR>
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</TABLE>
</DIV>



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<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>v33753exv99w1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
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<P align="right" style="font-size: 12pt">EXHIBIT 99.1

<P align="left" style="font-size: 12pt"><B>FOR IMMEDIATE RELEASE</B>


<DIV align="center">
<TABLE style="font-size: 12pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
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    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="98%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><B>CONTACT:&nbsp;&nbsp;&nbsp;&nbsp;</B>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Investor Relations<BR>
John Eldridge<BR>
(206)&nbsp;272-6571<BR>
<U>j.eldridge@f5.com</U></TD>
</TR>
<TR valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Public Relations<BR>
Alane Moran<BR>
(206)&nbsp;272-6850<BR>
<U>a.moran@f5.com</U></TD>
</TR>
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</TABLE>
</DIV>


<P align="center" style="font-size: 12pt"><B>F5 Networks Completes Acquisition of Acopia Networks</B>

<P align="center" style="font-size: 12pt"><B><I>Extends value of its Application Delivery Network to include management of customers&#146;<BR>
burgeoning file storage assets</I></B>

<P align="left" style="font-size: 12pt; margin-top: 24pt"><B>SEATTLE, SEPTEMBER 13, 2007 </B>&#151; <U>F5 Networks, Inc.</U> (Nasdaq: FFIV), the global leader in Application
Delivery Networking, today announced that it has completed the acquisition of Acopia Networks,
Inc., a best-of-breed provider of high-performance, intelligent file virtualization solutions. On
August&nbsp;6, 2007, F5 announced the execution of a definitive agreement to acquire Acopia.


<P align="left" style="font-size: 12pt">Acopia solutions increase F5&#146;s strategic value to customers by optimizing the network storage layer
that is entrusted with an organization&#146;s data. In extending the power of intelligent networking to
all levels of application delivery, the acquisition furthers F5&#146;s strategic goal of making
applications and information readily available to global users.


<P align="left" style="font-size: 12pt">&#147;Customers are recognizing the value of applying intelligent network technology to the challenges
of managing growth at all levels of the application delivery infrastructure,&#148; said Steve Duplessie,
Founder and Senior Analyst at Enterprise Strategy Group (ESG). &#147;As the demands of doing business
across the extended enterprise increase, the ability of application delivery controllers to
intelligently optimize availability, performance, and user access to information has made them
the primary weapon in an IT organization&#146;s arsenal. Intelligent file virtualization leverages the
same concepts to address the equally challenging issues facing IT in managing the resulting growth
of their file storage infrastructures.&#148; An in-depth analysis from ESG regarding the acquisition can
be found at <U>http://www.f5.com/reports/esg20070801.pdf</U>.

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<P align="left" style="font-size: 12pt">&#147;Acopia has proven technology that is widely deployed in global enterprises today. Intelligent
file virtualization is a natural and important extension to F5&#146;s data center vision,&#148; said John
McAdam, President and CEO of F5. &#147;Within the datacenter, F5 optimizes the web and application
layers. Externally, we optimize the links between data centers. With the addition of Acopia, we
extend that value by optimizing the file storage layer&#151;providing our customers faster, more
secure, and more reliable access to applications and information regardless of their location.&#148;


<P align="left" style="font-size: 12pt">Acopia&#146;s President and CEO, Christopher Lynch, and his leadership team are joining F5&#146;s management
team. &#147;I&#146;m excited to bring the two companies together and demonstrate to customers how Acopia
extends F5&#146;s Application Delivery Network value proposition,&#148; said Lynch. &#147;Acopia customers
recognize that our products enable their networks to provide better control, manageability,
availability, and access to information, which is the reason Acopia&#146;s technology is the leading
intelligent file virtualization solution deployed in large enterprises today.&#148;


<P align="left" style="font-size: 12pt">Based on the purchase price allocation, F5 expects to take a one-time charge of $14&nbsp;million ($0.16
per diluted share) in the current quarter for in-process research and development related to this
acquisition. Management will provide more information on Acopia and the impact of
acquisition-related expenses on subsequent quarters during the company&#146;s quarterly conference call
on October&nbsp;24th.


<P align="left" style="font-size: 12pt"><B>About F5 Networks</B>



<P align="left" style="font-size: 12pt">F5 Networks is the global leader in Application Delivery Networking. F5 provides solutions that
make applications secure, fast and available for everyone, helping organizations get the most out
of their investment. By adding intelligence and manageability into the network to offload
applications, F5 optimizes applications and allows them to work faster and consume fewer resources. F5&#146;s extensible architecture
intelligently integrates application optimization, protects the application and the network, and
delivers application reliability&#151;all on one universal platform. Over 10,000 organizations and
service providers worldwide trust F5 to keep their applications running. The company is
headquartered in Seattle, Washington with offices worldwide. For more information, go to
<U>www.f5.com</U>.

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<P align="left" style="font-size: 12pt">This press release may contain forward looking statements relating to future events or future
financial performance that involve risks and uncertainties. Such statements can be identified by
terminology such as &#147;may,&#148; &#147;will,&#148; &#147;should,&#148; &#147;expects,&#148; &#147;plans,&#148; &#147;anticipates,&#148; &#147;believes,&#148;
&#147;estimates,&#148; &#147;predicts,&#148; &#147;potential,&#148; or &#147;continue,&#148; or the negative of such terms or comparable
terms. These statements are only predictions and actual results could differ materially from those
anticipated in these statements based upon a number of factors including those identified in the
company&#146;s filings with the SEC.

<P align="center" style="font-size: 12pt"># # #

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