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      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman">UNITED
STATES</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman">SECURITIES
AND EXCHANGE COMMISSION</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman">WASHINGTON,
D.C. 20549</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 20pt; FONT-FAMILY: Times New Roman">FORM
8-K</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman">CURRENT
REPORT</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: normal; FONT-SIZE: 13pt; FONT-FAMILY: Times New Roman">Pursuant
to Section 13 or 15(d) of the Securities Exchange Act of 1934</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 13pt; FONT-FAMILY: Times New Roman">Date of Report (Date of
Earliest Event Reported):&#160;&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 13pt; FONT-FAMILY: Times New Roman; TEXT-DECORATION: none">April
25, 2008</font></font></font></font></font></font></font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 24pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; TEXT-DECORATION: none">Isilon Systems,
Inc.</font></font></div>
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name of registrant as specified in its charter)</font></div>
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other jurisdiction of incorporation)</font></div>
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315-7500</font></div>
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telephone number, including area code)</font></div>
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Applicable</font></font></div>
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name or former address, if changed since last report)</font></div>
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      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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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:</font></div>
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      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)</font></div>
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      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      140.14a-12)</font></div>
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      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))</font></div>
              </td>
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              <td align="left" valign="top" width="7%">
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">
        <div>&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><a name="toc"><br></a></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; TEXT-DECORATION: underline">TABLE
OF CONTENTS</font></font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><a href="#item502"><font style="FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: bold"><font style="FONT-SIZE: 11pt; FONT-FAMILY: Times New Roman"><font style="FONT-WEIGHT: bold"><font style="FONT-WEIGHT: normal; FONT-SIZE: 11pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item 5.02.&#160; <font style="DISPLAY: inline; FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Departure
of Directors or Certain Officers; Election of Directors; Appointment of Certain
Officers; Compensatory Arrangements of Certain
Offices</font></font></font></font></font></font></font></font></font></font></font></font></a></font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><a href="#Signatures"><font style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SIGNATURES</font></a></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><br><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><a name="item502"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
5.02</font></a><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;&#160;&#160; <font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Departure
of Directors or Certain Officers; Election of Directors; Appointment of Certain
Officers; Compensatory Arrangements of Certain
Offices</font></font></font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">
          <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">
            <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">
              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
April&#160;25 2008, the Compensation Committee of Isilon Systems, Inc. approved
fiscal year 2008 compensation arrangements for its executive
officers.&#160;&#160;Base salaries for certain named executive officers were
increased as follows:</font></div>
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              <div align="left">
                <table cellpadding="0" cellspacing="0" width="100%">
                    <tr>
                      <td align="left" valign="bottom" style="BORDER-BOTTOM: black 2px solid">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Named
      Executive Officer</font></font></div>
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                      <td align="left" valign="bottom" style="PADDING-BOTTOM: 2px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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                      </td>
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                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">New</font></font></div>
                      </td>
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                    </tr>
                    <tr>
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                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Steven
      D. Fitz, Senior VP of Worldwide Sales and Services</font></div>
                      </td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">225,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">250,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Gwen
      E. Weld, VP of Human Resources and Organizational
    Development</font></div>
                      </td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">185,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">200,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                    </tr>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB2" style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;The
Compensation Committee did not adjust the base salaries of the other named
executive officers, which remained in effect at their current rates, as
described in our 2008 proxy statement filed with the Securities and Exchange
Commission on April 24, 2008.</font></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">In
addition, the Compensation Committee approved performance-based incentive
compensation targets for fiscal year 2008 for named executive officers as
follows:</font></div>
              <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
              <div align="left">
                <table cellpadding="0" cellspacing="0" width="100%">
                    <tr>
                      <td align="left" valign="bottom" style="BORDER-BOTTOM: black 2px solid">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Named
      Executive Officer</font></font></div>
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                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Target</font></font></div>
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                    <tr>
                      <td align="left" valign="bottom" width="88%">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Sujal
      M. Patel, President and Chief Executive Officer</font></div>
                      </td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">200,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                    </tr>
                    <tr>
                      <td align="left" valign="bottom" width="88%">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Steven
      D. Fitz, Senior VP of Worldwide Sales and Services</font></div>
                      </td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">275,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                    </tr>
                    <tr>
                      <td align="left" valign="bottom" width="88%">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Gwen
      E. Weld, VP Human Resources and Organizational Development</font></div>
                      </td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">150,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                    </tr>
                    <tr>
                      <td align="left" valign="bottom" width="88%">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Paul
      G. Rutherford, Chief Technology Officer</font></div>
                      </td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">150,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                    </tr>
                    <tr>
                      <td align="left" valign="bottom" width="88%">
                        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">William
      D. Richter, Interim Chief Financial Officer and VP of
    Finance</font></div>
                      </td>
                      <td align="right" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                      <td align="left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
                      <td align="right" valign="bottom" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">100,000</font></td>
                      <td align="left" nowrap valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
                    </tr>
                </table>
              </div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">In regard
to the performance-based incentive compensation targets, as discussed in our
2008 proxy statement, the Compensation Committee established a new
performance-based incentive program for executive officers that is based upon
the achievement by the company of specified annual revenue goals, non-GAAP
operating income goals and corporate-wide performance goals.&#160;&#160;Such
performance-based target bonuses are based on the following:&#160;&#160;50%
based on achievement of specified annual revenue goals, 25% based on achievement
of specified non-GAAP operating income goals, and 25% based on achievement of
additional specified corporate-wide performance goals.&#160;&#160;For any
executive officer to qualify for any bonus payment tied to the revenue goals,
the company must achieve at least 80% of the specified goals; in order for any
executive to qualify for any bonus payment tied to the non-GAAP operating income
goals, the company must achieve at least 100% of the specified
goals.&#160;&#160;Moreover, in the event that the specified company revenue
goals are exceeded, executive officers will have the opportunity to earn an
incremental bonus based on the amount the company exceeds the targeted revenue
goals.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
Compensation Committee also authorized the granting of stock option awards to
our named executive officers pursuant to our 2006 Equity Incentive
Plan.</font></div>
              <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
            </div>
          </div>
        </div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
        <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
          <div id="FTR">
            <div id="GLFTR" style="WIDTH: 100%" align="left">
            </div>
          </div>
          <div id="PN" style="PAGE-BREAK-AFTER: always">
            <div style="WIDTH: 100%; TEXT-ALIGN: center">
            </div>
            <div style="WIDTH: 100%; TEXT-ALIGN: center">
              <hr style="COLOR: black" noshade size="2">
            </div>
          </div>
          <div id="HDR">
            <div id="GLHDR" style="WIDTH: 100%" align="right">
            </div>
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        </div>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><a name="Signatures">SIGNATURES</a></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;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.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td align="left" valign="top" width="46%" style="PADDING-BOTTOM: 2px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="9%" style="PADDING-BOTTOM: 2px"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="45%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Isilon
      Systems, Inc.</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="45%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Registrant)</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="45%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%" style="PADDING-BOTTOM: 2px">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Date:&#160;&#160;May
      1, 2008</font></div>
              </td>
              <td align="left" valign="top" width="9%" style="PADDING-BOTTOM: 2px">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">By:</font></div>
              </td>
              <td align="left" valign="top" width="45%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">/s/ <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: times new roman">Keenan
      M. Conder</font></font></font></font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="45%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-STYLE: normal; FONT-FAMILY: times new roman">Keenan
      M. Conder</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="46%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-STYLE: normal; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="9%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-STYLE: normal; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="45%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-STYLE: normal; FONT-FAMILY: times new roman">VP
      General Counsel and Secretary</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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form8k.htm
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
WASHINGTON,
D.C. 20549
FORM
8-K
CURRENT
REPORT
Pursuant
to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of
Earliest Event Reported):
April
25, 2008
Isilon Systems,
Inc.
(Exact
name of registrant as specified in its charter)
Delaware
(State or
other jurisdiction of incorporation)
001-33196
91-2101027
(Commission
      File Number)
(IRS
      Employer Identification No.)
3101
      Western Avenue, Seattle, Washington
98121
(Address
      of principal executive offices)
(Zip
      Code)
(206)
315-7500
(Registrant's
telephone number, including area code)
Not
Applicable
(Former
name or former address, if changed since last report)
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:
[   
      ]
Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)
[   
      ]
Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      140.14a-12)
[   
      ]
Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))
[   
      ]
Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))
TABLE
OF CONTENTS
Item 5.02.
Departure
of Directors or Certain Officers; Election of Directors; Appointment of Certain
Officers; Compensatory Arrangements of Certain
Offices
SIGNATURES
Item
5.02
Departure
of Directors or Certain Officers; Election of Directors; Appointment of Certain
Officers; Compensatory Arrangements of Certain
Offices
On
April 25 2008, the Compensation Committee of Isilon Systems, Inc. approved
fiscal year 2008 compensation arrangements for its executive
officers.  Base salaries for certain named executive officers were
increased as follows:
Named
      Executive Officer
Previous
New
Steven
      D. Fitz, Senior VP of Worldwide Sales and Services
$
225,000
$
250,000
Gwen
      E. Weld, VP of Human Resources and Organizational
    Development
$
185,000
$
200,000
The
Compensation Committee did not adjust the base salaries of the other named
executive officers, which remained in effect at their current rates, as
described in our 2008 proxy statement filed with the Securities and Exchange
Commission on April 24, 2008.
In
addition, the Compensation Committee approved performance-based incentive
compensation targets for fiscal year 2008 for named executive officers as
follows:
Named
      Executive Officer
Target
Sujal
      M. Patel, President and Chief Executive Officer
$
200,000
Steven
      D. Fitz, Senior VP of Worldwide Sales and Services
$
275,000
Gwen
      E. Weld, VP Human Resources and Organizational Development
$
150,000
Paul
      G. Rutherford, Chief Technology Officer
$
150,000
William
      D. Richter, Interim Chief Financial Officer and VP of
    Finance
$
100,000
In regard
to the performance-based incentive compensation targets, as discussed in our
2008 proxy statement, the Compensation Committee established a new
performance-based incentive program for executive officers that is based upon
the achievement by the company of specified annual revenue goals, non-GAAP
operating income goals and corporate-wide performance goals.  Such
performance-based target bonuses are based on the following:  50%
based on achievement of specified annual revenue goals, 25% based on achievement
of specified non-GAAP operating income goals, and 25% based on achievement of
additional specified corporate-wide performance goals.  For any
executive officer to qualify for any bonus payment tied to the revenue goals,
the company must achieve at least 80% of the specified goals; in order for any
executive to qualify for any bonus payment tied to the non-GAAP operating income
goals, the company must achieve at least 100% of the specified
goals.  Moreover, in the event that the specified company revenue
goals are exceeded, executive officers will have the opportunity to earn an
incremental bonus based on the amount the company exceeds the targeted revenue
goals.
The
Compensation Committee also authorized the granting of stock option awards to
our named executive officers pursuant to our 2006 Equity Incentive
Plan.
SIGNATURES
Pursuant to
the requirements of the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned hereunto duly
authorized.
Isilon
      Systems, Inc.
(Registrant)
Date:  May
      1, 2008
By:
/s/
Keenan
      M. Conder
Keenan
      M. Conder
VP
      General Counsel and Secretary