<SUBMISSION>
<ACCESSION-NUMBER>0000950134-09-000197
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20090107
<ITEMS>5.03
<ITEMS>9.01
<FILING-DATE>20090107
<DATE-OF-FILING-DATE-CHANGE>20090107
<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>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>000-26041
<FILM-NUMBER>09513575
</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>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>v51029e8vk.htm
<DESCRIPTION>FORM 8-K
<TEXT>
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<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<BR>
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 8-K</B>
</DIV>


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

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>
Date of Report (Date of earliest event reported) January&nbsp;7, 2009</B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>F5 Networks, Inc.<BR>
<DIV style="width: 100%; border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV></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">Washington
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">000-26041
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">91-1714307</TD>
</TR>
<TR style="font-size: 1px">
    <TD colspan="5" valign="top" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other jurisdiction
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Commission
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(IRS Employer</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">of incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">File Number)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Identification No.)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</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="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">401 Elliott Avenue West
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Seattle, WA 98119</TD>
</TR>
<TR style="font-size: 1px">
    <TD colspan="3" valign="top" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(Address of principal executive offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Zip Code)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left">Registrant&#146;s telephone number, including area code</TD>
    <TD>&nbsp;</TD>
    <TD>(206)&nbsp;272-5555<DIV style="width: 100%; border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV></TD>
</TR>
</TABLE>
</DIV>
<DIV align="center" style="font-size: 10pt; margin-top: 12pt">
Not Applicable<BR>

<DIV style="width: 100%; border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV></DIV>


<DIV align="center" style="font-size: 10pt">(Former name or former address, if changed since last report.)</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">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:</DIV>

<DIV align="left" style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>

<TR>
    <TD><FONT face="Wingdings">&#111;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)
</TD>
</TR>
</TABLE>
</DIV>

<DIV align="left" style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>

<TR>
    <TD><FONT face="Wingdings">&#111;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)
</TD>
</TR>
</TABLE>
</DIV>

<DIV align="left" style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>

<TR>
    <TD><FONT face="Wingdings">&#111;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>Pre-commencement communications pursuant to Rule&nbsp;14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
</TD>
</TR>
</TABLE>
</DIV>

<DIV align="left" style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>

<TR>
    <TD><FONT face="Wingdings">&#111;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>Pre-commencement communications pursuant to Rule&nbsp;13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
</TD>
</TR>
</TABLE>
</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>













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

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">











<!-- link2 "Item&nbsp;5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year" -->

<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;5.03</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year</B></TD>
</TR>
</TABLE>
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Previously, our board of directors amended sections 3.3 and 3.4 of our bylaws to provide for
majority voting in non-contested elections of our directors. This amendment was reported on a Form
8-K filed on October&nbsp;20, 2008.</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Our board of directors further amended sections 3.3, 3.4 and 3.6 of our bylaws, effective January
7, 2009, to (i)&nbsp;reflect the staggered terms of members of our board of directors, as provided in
our articles of incorporation, (ii)&nbsp;remove the requirement that a special shareholders&#146; meeting be
held if no director receives a majority vote in a non-contested election, and (iii)&nbsp;make clear that
a director elected to fill any vacancy shall hold office until the next shareholders&#146; meeting at
which directors are elected at which time such director may be elected to serve until the
expiration of the term of the class in which such vacancy was filled. A copy of this amendment is
filed as Exhibit&nbsp;3.1 to this Current Report on Form 8-K and is incorporated herein by reference.</DIV>

<!-- link2 "Item&nbsp;9.01 Financial Statements and Exhibits" -->

<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left"><B>Item&nbsp;9.01</B></TD>
    <TD>&nbsp;</TD>
    <TD><B>Financial Statements and Exhibits</B></TD>
</TR>
</TABLE>
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(d)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Exhibits.</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The following exhibit is filed as part of this Current Report on Form 8-K:</TD>
</TR>

</TABLE>
</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="2%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="96%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">3.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment to sections 3.3, 3.4 and 3.6 of the Second Amended and Restated Bylaws of F5 Networks, Inc.</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">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- link1 " SIGNATURES" -->

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

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">F5 NETWORKS, INC.<BR>
(Registrant)<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">Date:  January 7, 2009&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left"><I>/s/ Jeffrey A. Christianson</I>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Jeffrey A. Christianson&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Sr. Vice President and General Counsel&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

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

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<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</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="10%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="87%">&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 -->
<!-- Begin Table Body -->
<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>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">3.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment to sections 3.3, 3.4 and 3.6 of the Second Amended and Restated Bylaws of F5
Networks, Inc.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
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<TYPE>EX-3.1
<SEQUENCE>2
<FILENAME>v51029exv3w1.htm
<DESCRIPTION>EX-3.1
<TEXT>
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<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Exhibit&nbsp;3.1
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Sections&nbsp;3.3, 3.4 and 3.6 of the Second Amended and Restated Bylaws of F5 Networks, Inc. are
amended and restated in their entirety as follows:</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">3.3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ELECTION. At each annual shareholders&#146; meeting, the shareholders shall elect directors to hold
office for the term for which elected and, except as otherwise provided in this Section&nbsp;3.3, until
their respective successors are elected and qualified.</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">In a non-contested election, a nominee for director shall be elected by the vote of a majority of
the votes cast. A majority of votes cast means that the number of shares cast &#147;for&#148; a nominee&#146;s
election exceeds the number of votes cast &#147;against&#148; that nominee&#146;s election. The following shall
not be votes cast: (a)&nbsp;a share whose ballot is marked as withheld; (b)&nbsp;a share otherwise present
at the meeting but for which there is an abstention; and (c)&nbsp;a share otherwise present at the
meeting as to which a shareholder gives no authority or direction. In a contested election,
directors shall be elected by the vote of a plurality of the votes cast. A contested election is
one in which the number of nominees exceeds the number of directors to be elected.</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The following procedures apply in a non-contested election. A nominee who does not receive a
majority vote shall not be elected. An incumbent director who is not elected because he or she
does not receive a majority vote shall continue to serve as a holdover director until the earliest
of (a)&nbsp;ninety (90)&nbsp;days after the date on which an inspector determines the voting results as to
that director pursuant to RCW 23B.07.035(2); (b)&nbsp;the date on which the Board of Directors appoints
an individual to fill the office held by such director, which appointment shall constitute the
filling of a vacancy by the Board of Directors pursuant to Section&nbsp;3.4; or (c)&nbsp;the date of the
director&#146;s resignation. Any vacancy resulting from the non-election of a director under this
Section&nbsp;3.3 may be filled by the Board of Directors as provided in Section&nbsp;3.4. The Nominating and
Corporate Governance Committee will consider promptly whether to fill the office of a nominee
failing to receive a majority vote and make a recommendation to the Board of Directors about
filling the office. The Board of Directors will act on the Nominating and Corporate Governance
Committee&#146;s recommendation and within ninety (90)&nbsp;days after the certification of the shareholder
vote will disclose publicly its decision. No holdover director will participate in the Nominating
and Corporate Governance Committee recommendation or Board decision about filling his or her
office.</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">3.4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;VACANCIES. Unless otherwise provided by the Washington Business Corporation Act, in case of
any vacancy in the Board of Directors, including a vacancy resulting from an increase in the number
of directors or non-election of a director pursuant to Section&nbsp;3.3, the remaining directors,
whether constituting a quorum or not, may fill the vacancy. A director elected to fill any vacancy
shall hold office until the next shareholders&#146; meeting at which directors are elected at which time
such director may be elected to serve until the expiration of the term of the class in which such
vacancy was filled.</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">3.6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;RESIGNATION. Any director may resign at any time by delivering his written resignation to the
Secretary, such resignation to specify whether it will be effective at a particular time, upon
receipt by the Secretary or at the pleasure of the Board of Directors. If no such specification is
made, it shall be deemed effective at the pleasure of the Board of Directors. When one or more
directors shall resign from the Board of Directors, effective at a future date, a majority of the
directors then in office, including those who have so resigned, shall have power to fill such
vacancy or vacancies, the vote thereon to take effect when such resignation or resignations shall
become effective, and each director so chosen shall hold office until the next shareholders&#146;
meeting at which directors are elected at which time such director may be elected to serve until
the expiration of the term of the class in which such vacancy was filled.</DIV>



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