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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">As filed
with the Securities and Exchange Commission on March&nbsp;13, 2009&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font></b></p>

<p align="right" style="margin:0in .5in .0001pt 0in;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Registration No.&nbsp;333-</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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<p align="left" style="border:none;margin:0in 0in .0001pt;padding:0in;text-align:left;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>

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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED
STATES</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES
AND EXCHANGE COMMISSION</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington,
D.C. 20549</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade color="black" align="center"></div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;S-8</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">REGISTRATION
STATEMENT</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">UNDER</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">THE
SECURITIES ACT OF 1933</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade color="black" align="center"></div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">Optimer
Pharmaceuticals,&nbsp;Inc.</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of
registrant as specified in its charter)</font></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="center">

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Delaware</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">33-0830300</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other
  jurisdiction of incorporation or <br>
  organization)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(I.R.S. Employer
  Identification No.)</font></p>
  </td>
 </tr>
</table>

</div>

<p align="left" style="margin:0in .75in .0001pt 0in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">10110 Sorrento Valley Road, Suite&nbsp;C</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">San Diego, California 92121</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of Principal Executive Offices)</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">2006 Equity Incentive Plan</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Employee Stock Purchase Plan</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Full titles of the plans)</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Michael N. Chang<br>
President and Chief Executive Officer<br>
Optimer Pharmaceuticals,&nbsp;Inc.<br>
10110 Sorrento Valley Road, Suite&nbsp;C<br>
San Diego, CA 92121<br>
(858) 909-0736</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name, address, including zip code, and telephone
number, including area code, of agent for service)</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade color="black" align="center"></div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Copies to:</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">&nbsp;</font></i></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.0%;">
  <p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">John D.
  Prunty <br>
  </font></b>Chief Financial Officer <br>
  Optimer Pharmaceuticals,&nbsp;Inc. <br>
  10110 Sorrento Valley Road, Suite&nbsp;C <br>
  San Diego, CA 92121 <br>
  (858) 909-0736</p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.0%;">
  <p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Thomas
  A. Coll,&nbsp;Esq.</font></b>  <br>
  <b>Sean M. Clayton,&nbsp;Esq.</b><b>  </b><br> Cooley Godward Kronish LLP  <br>
  4401 Eastgate Mall <br>
  San Diego, California 92121 <br>
  (858) 550-6000</p>
  </td>
 </tr>
</table>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Indicate by check
mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company:</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="22%" valign="top" style="padding:0in 0in 0in 0in;width:22.96%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Large
  Accelerated Filer </font><font face="Wingdings">o</font></p>
  </td>
  <td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.66%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="top" style="padding:0in 0in 0in 0in;width:17.7%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Accelerated
  Filer </font><font face="Wingdings">x</font></p>
  </td>
  <td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.66%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="21%" valign="top" style="padding:0in 0in 0in 0in;width:21.32%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Non-accelerated
  Filer </font><font face="Wingdings">o</font></p>
  </td>
  <td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.66%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="27%" valign="top" style="padding:0in 0in 0in 0in;width:27.04%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Smaller
  Reporting Company </font><font face="Wingdings">o</font></p>
  </td>
 </tr>
</table>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">CALCULATION
OF REGISTRATION FEE</font></b></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="23%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:23.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Title&nbsp;of&nbsp;Securities&nbsp;<br>
  to&nbsp;be&nbsp;Registered</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="22%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:22.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Amount&nbsp;to&nbsp;be&nbsp;Registered&nbsp;(1)</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="16%" colspan="2" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:16.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Proposed&nbsp;Maximum&nbsp;<br>
  Offering&nbsp;<br>
  Price&nbsp;Per&nbsp;Share&nbsp;(2)</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="16%" colspan="2" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:16.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Proposed&nbsp;Maximum&nbsp;<br>
  Aggregate&nbsp;<br>
  Offering&nbsp;Price&nbsp;(2)</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="12%" colspan="2" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:12.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Amount&nbsp;of&nbsp;<br>
  Registration&nbsp;Fee</font></b></p>
  </td>
  <td width="1%" valign="bottom" style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:1.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="23%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:23.0%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt 10.0pt;text-align:left;text-indent:-10.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">2006 Equity Incentive Plan<br>
  </font></b>Common Stock (par value $0.001)</p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="22%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:22.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">1,500,000 shares (3)</font></p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:1.12%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="14%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:14.88%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">11.76</font></p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:1.12%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="14%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:14.88%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">17,640,000</font></p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:1.12%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="10%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:10.88%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">693</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:1.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="23%" valign="top" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:23.0%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt 10.0pt;text-align:left;text-indent:-10.0pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Employee Stock Purchase Plan</font></b><br>
  Common Stock (par value $0.001)</p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="22%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:22.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">300,000 shares (4)</font></p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:1.12%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="14%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:14.88%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">11.76</font></p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:1.12%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="14%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:14.88%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3,528,000</font></p>
  </td>
  <td width="2%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:1.12%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$</font></p>
  </td>
  <td width="10%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:10.88%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">139</font></p>
  </td>
  <td width="1%" valign="bottom" style="border:none;border-bottom:double windowtext 2.25pt;padding:0in 0in 0in 0in;width:1.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to Rule&nbsp;416(a)&nbsp;under the Securities Act of 1933, as
  amended (the <b><i style="font-weight:bold;">&#147;Securities Act&#148;</i></b>), this
  Registration Statement shall also cover any additional shares of the
  Registrant&#146;s common stock (the <b><i style="font-weight:bold;">&#147;Common Stock&#148;</i></b>)
  that become issuable under the plans by reason of any stock dividend, stock
  split, recapitalization or other similar transaction.</font></p>
  </td>
 </tr>
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(2)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Estimated solely for the purpose of calculating the amount of the
  registration fee pursuant to Rule&nbsp;457(c)&nbsp;and
  Rule&nbsp;457(h)(1)&nbsp;under the Securities Act. The price per share and
  aggregate offering price are based upon the average of the high and low
  prices of the Registrant&#146;s Common Stock on March&nbsp;10, 2009, as reported
  on the Nasdaq Global Market.</font></p>
  </td>
 </tr>
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(3)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Represents 750,000 shares of Common Stock that were automatically
  added to the shares authorized for issuance under the Registrant&#146;s 2006
  Equity Incentive Plan (the &#147;<b><i style="font-weight:bold;">2006 EIP</i></b>&#148;)
  on each of January&nbsp;1, 2008 and January&nbsp;1, 2009 pursuant to an
  &#147;evergreen&#148; provision contained in the 2006 EIP. Pursuant to such provision,
  on January&nbsp;1</font><font size="1" style="font-size:6.5pt;position:relative;top:-3.0pt;">st</font>&nbsp;of
  each year commencing in 2008, the number of shares authorized for issuance
  under the 2006 EIP is automatically increased by a number equal to the lesser
  of (i)&nbsp;5% of the aggregate number of shares of Common Stock outstanding
  on December&nbsp;31<font size="1" style="font-size:6.5pt;position:relative;top:-3.0pt;">st</font>&nbsp;of
  the preceding calendar year, (ii)&nbsp;750,000 shares of Common Stock or
  (iii)&nbsp;a lesser number of shares of Common Stock that may be determined
  by the Registrant&#146;s Board of Directors.</p>
  </td>
 </tr>
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(4)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.14%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="93%" valign="top" style="padding:0in 0in 0in 0in;width:93.6%;">
  <p align="left" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Represents shares of Common Stock that were automatically added to the
  shares authorized for issuance under the Registrant&#146;s Employee Stock Purchase
  Plan (the &#147;<b><i style="font-weight:bold;">ESPP</i></b>&#148;) on January&nbsp;1,
  2008 pursuant to an &#147;evergreen&#148; provision contained in the ESPP. Pursuant to
  such provision, on January&nbsp;1</font><font size="1" style="font-size:6.5pt;position:relative;top:-3.0pt;">st</font>&nbsp;of each year commencing in 2008, the number
  of shares authorized for issuance under the ESPP is automatically increased
  by a number equal to the lesser of (i)&nbsp;3% of the aggregate number of
  shares of Common Stock outstanding on December&nbsp;31<font size="1" style="font-size:6.5pt;position:relative;top:-3.0pt;">st</font>&nbsp;of the preceding calendar year,
  (ii)&nbsp;300,000 shares of Common Stock, or (iii)&nbsp;a lesser number of
  shares that may be determined by the Registrant&#146;s Board of Directors.</p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div style="border-bottom:solid windowtext 3.0pt;border-left:none;border-right:none;border-top:solid windowtext 1.0pt;padding:1.0pt 0in 1.0pt 0in;">

<p align="left" style="border:none;margin:0in 0in .0001pt;padding:0in;text-align:left;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>

</div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>

<div align="left" style="margin:0in 0in .0001pt;text-align:left;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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<div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">INCORPORATION
BY REFERENCE OF CONTENTS OF</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">REGISTRATION
STATEMENT ON FORM&nbsp;S-8 NO. 333-140739</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This Registration Statement is being filed for the purpose of
increasing the number of securities of the same class as other securities for
which a Registration Statement on Form&nbsp;S-8 relating to the same benefit
plans is effective. The Registrant previously registered shares of its Common
Stock for issuance under the 2006 EIP and the ESPP under a Registration
Statement on Form&nbsp;S-8 filed with the Securities and Exchange Commission on
February&nbsp;15,&nbsp;2007 (File No.&nbsp;333-140739). Pursuant to General
Instruction E to Form&nbsp;S-8, this Registration Statement hereby incorporates
by reference the contents of the Registration Statement referenced above.</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>

<div align="left" style="margin:0in 0in .0001pt;text-align:left;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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<div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form&nbsp;S-8 and has duly caused
this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of San Diego, State of California, on
the 13th day of March, 2009.</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">OPTIMER
  PHARMACEUTICALS, INC.</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.4%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By: </font></p>
  </td>
  <td width="44%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:44.34%;">
  <p align="left" style="margin:0in 0in .0001pt 60.0pt;text-align:left;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/&nbsp;&nbsp; MICHAEL N. CHANG </font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.4%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0in 0in 0in 0in;width:44.34%;">
  <p align="left" style="margin:0in 0in .0001pt 1.0in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Michael N. Chang</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.4%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="44%" valign="top" style="padding:0in 0in 0in 0in;width:44.34%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">President and
  Chief Executive Officer</font></p>
  </td>
 </tr>
</table>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">POWER
OF ATTORNEY</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">KNOW ALL PERSONS
BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints Michael N. Chang and John D. Prunty, and each of them, as his true
and lawful attorneys in fact and agents, with full power of substitution and
resubstitution, for him and in his name, place, and stead, in any and all
capacities, to sign any and all amendments (including post effective
amendments, exhibits thereto and other documents in connection therewith) to
this Registration Statement, and to file the same, with all exhibits thereto,
and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys in fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in connection therewith, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys in fact and agents, or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the
requirements of the Securities Act of 1933, this Registration Statement has
been signed by the following persons in the capacities and on the dates
indicated.</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="36%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Signature</font></b></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="38%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:38.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Title</font></b></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="20%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:20.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Date</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="38%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:38.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="20%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:20.0%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ MICHAEL N. CHANG</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">President, Chief
  Executive Officer and Director </font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Michael N. Chang</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Principal
  Executive Officer)</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ JOHN D. PRUNTY</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Chief Financial
  Officer, Vice President, Finance </font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">John D. Prunty</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">and Secretary
  (Principal Accounting and </font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Financial
  Officer)</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ ANTHONY E. ALTIG</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Anthony E. Altig</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt .5in;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ MARK AUERBACH</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Mark Auerbach</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ JOSEPH Y. CHANG</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Joseph Y. Chang</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ PETER E. GREBOW</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Peter E. Grebow</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ ALAIN B. SCHREIBER</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Director</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">March&nbsp;13,
  2009</font></p>
  </td>
 </tr>
 <tr>
  <td width="36%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:36.16%;">
  <p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Alain B. Schreiber</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.84%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="38%" valign="top" style="padding:0in 0in 0in 0in;width:38.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="20%" valign="top" style="padding:0in 0in 0in 0in;width:20.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="left" style="margin:0in 0in .0001pt;text-align:left;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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<br clear="all" style="page-break-before:always;">


<div style="font-family:Times New Roman;">

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT
INDEX</font></b></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="7%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit</font></b><font size="1" style="font-size:8.0pt;">  <br>
  <b>Number</b></font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="bottom" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="bottom" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.1(1)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Certificate of
  Incorporation of Optimer Pharmaceuticals,&nbsp;Inc. as amended and restated.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.2(2)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Bylaws of
  Optimer Pharmaceuticals,&nbsp;Inc., as amended.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.3(3)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Common Stock
  Certificate of Optimer Pharmaceuticals,&nbsp;Inc.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.4(4)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Investors&#146;
  Rights Agreement by and among Optimer Pharmaceuticals,&nbsp;Inc. and certain
  stockholders of Optimer Pharmaceuticals,&nbsp;Inc., dated November&nbsp;30,
  2005, as amended and restated.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.5(5)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Registration
  Rights Agreement, dated October&nbsp;23, 2007, by and between Optimer
  Pharmaceuticals,&nbsp;Inc. and the purchasers listed on the signature
  pages&nbsp;thereto.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.6(6)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form&nbsp;of
  Warrant issued to certain investors on March&nbsp;9, 2009.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.1</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Opinion of
  Cooley Godward Kronish LLP.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.1</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of
  Independent Registered Public Accounting Firm.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">23.2</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Consent of
  Cooley Godward Kronish LLP. Reference is made to Exhibit&nbsp;5.1.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">24.1</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Power of
  Attorney. Reference is made to the signature page&nbsp;hereto.</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="left" style="margin:0in 0in .0001pt;text-align:left;"><hr size="1" width="25%" noshade color="black" align="left"></div>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(1)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed with
  Registrant&#146;s Amendment No.&nbsp;3 to Registration Statement on Form&nbsp;S-1
  on January&nbsp;22, 2007.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(2)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed with
  Registrant&#146;s Current Report on Form&nbsp;8-K on September&nbsp;18, 2007.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(3)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed with
  Registrant&#146;s Amendment No.&nbsp;4 to Registration Statement on Form&nbsp;S-1
  on February&nbsp;5, 2007.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(4)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed with
  Registrant&#146;s Amendment No.&nbsp;3 to Registration Statement on Form&nbsp;S-1
  November&nbsp;9, 2006.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(5)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed with
  Registrant&#146;s Current Report on Form&nbsp;8-K on October&nbsp;29, 2007.</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.76%;">
  <p align="left" style="margin:0in 0in .0001pt 5.05pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(6)</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.5%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="89%" valign="top" style="padding:0in 0in 0in 0in;width:89.74%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filed with
  Registrant&#146;s Current Report on Form&nbsp;8-K on March&nbsp;5, 2009.</font></p>
  </td>
 </tr>
</table>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div align="left" style="margin:0in 0in .0001pt;text-align:left;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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{"company-data": {"conformed-name": "OPTIMER PHARMACEUTICALS INC", "cik": "0001142576", "assigned-sic": "2834", "irs-number": "330830300", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-157897", "film-number": "09678540"}, "business-address": {"street1": "10110 SORRENTO VALLEY ROAD", "street2": "SUITE C", "city": "SAN DIEGO", "state": "CA", "zip": "92121", "phone": "8589090736"}, "mail-address": {"street1": "10110 SORRENTO VALLEY ROAD", "street2": "SUITE C", "city": "SAN DIEGO", "state": "CA", "zip": "92121"}}
As filed
with the Securities and Exchange Commission on March 13, 2009
Registration No. 333-
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
Washington,
D.C. 20549
FORM S-8
REGISTRATION
STATEMENT
UNDER
THE
SECURITIES ACT OF 1933
Optimer
Pharmaceuticals, Inc.
(Exact name of
registrant as specified in its charter)
Delaware
33-0830300
(State or other
  jurisdiction of incorporation or
organization)
(I.R.S. Employer
  Identification No.)
10110 Sorrento Valley Road, Suite C
San Diego, California 92121
(Address of Principal Executive Offices)
2006 Equity Incentive Plan
Employee Stock Purchase Plan
(Full titles of the plans)
Michael N. Chang
President and Chief Executive Officer
Optimer Pharmaceuticals, Inc.
10110 Sorrento Valley Road, Suite C
San Diego, CA 92121
(858) 909-0736
(Name, address, including zip code, and telephone
number, including area code, of agent for service)
Copies to:
John D.
  Prunty
Chief Financial Officer
Optimer Pharmaceuticals, Inc.
10110 Sorrento Valley Road, Suite C
San Diego, CA 92121
(858) 909-0736
Thomas
  A. Coll, Esq.
Sean M. Clayton, Esq.
Cooley Godward Kronish LLP
4401 Eastgate Mall
San Diego, California 92121
(858) 550-6000
Indicate by check
mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company:
Large
  Accelerated Filer
o
Accelerated
  Filer
x
Non-accelerated
  Filer
o
Smaller
  Reporting Company
o
CALCULATION
OF REGISTRATION FEE
Title of Securities
to be Registered
Amount to be Registered (1)
Proposed Maximum
Offering
Price Per Share (2)
Proposed Maximum
Aggregate
Offering Price (2)
Amount of
Registration Fee
2006 Equity Incentive Plan
Common Stock (par value $0.001)
1,500,000 shares (3)
$
11.76
$
17,640,000
$
693
Employee Stock Purchase Plan
Common Stock (par value $0.001)
300,000 shares (4)
$
11.76
$
3,528,000
$
139
(1)
Pursuant to Rule 416(a) under the Securities Act of 1933, as
  amended (the
"Securities Act"
), this
  Registration Statement shall also cover any additional shares of the
  Registrant's common stock (the
"Common Stock"
)
  that become issuable under the plans by reason of any stock dividend, stock
  split, recapitalization or other similar transaction.
(2)
Estimated solely for the purpose of calculating the amount of the
  registration fee pursuant to Rule 457(c) and
  Rule 457(h)(1) under the Securities Act. The price per share and
  aggregate offering price are based upon the average of the high and low
  prices of the Registrant's Common Stock on March 10, 2009, as reported
  on the Nasdaq Global Market.
(3)
Represents 750,000 shares of Common Stock that were automatically
  added to the shares authorized for issuance under the Registrant's 2006
  Equity Incentive Plan (the "
2006 EIP
")
  on each of January 1, 2008 and January 1, 2009 pursuant to an
  "evergreen" provision contained in the 2006 EIP. Pursuant to such provision,
  on January 1
st
of
  each year commencing in 2008, the number of shares authorized for issuance
  under the 2006 EIP is automatically increased by a number equal to the lesser
  of (i) 5% of the aggregate number of shares of Common Stock outstanding
  on December 31
st
of
  the preceding calendar year, (ii) 750,000 shares of Common Stock or
  (iii) a lesser number of shares of Common Stock that may be determined
  by the Registrant's Board of Directors.
(4)
Represents shares of Common Stock that were automatically added to the
  shares authorized for issuance under the Registrant's Employee Stock Purchase
  Plan (the "
ESPP
") on January 1,
  2008 pursuant to an "evergreen" provision contained in the ESPP. Pursuant to
  such provision, on January 1
st
of each year commencing in 2008, the number
  of shares authorized for issuance under the ESPP is automatically increased
  by a number equal to the lesser of (i) 3% of the aggregate number of
  shares of Common Stock outstanding on December 31
st
of the preceding calendar year,
  (ii) 300,000 shares of Common Stock, or (iii) a lesser number of
  shares that may be determined by the Registrant's Board of Directors.
INCORPORATION
BY REFERENCE OF CONTENTS OF
REGISTRATION
STATEMENT ON FORM S-8 NO. 333-140739
This Registration Statement is being filed for the purpose of
increasing the number of securities of the same class as other securities for
which a Registration Statement on Form S-8 relating to the same benefit
plans is effective. The Registrant previously registered shares of its Common
Stock for issuance under the 2006 EIP and the ESPP under a Registration
Statement on Form S-8 filed with the Securities and Exchange Commission on
February 15, 2007 (File No. 333-140739). Pursuant to General
Instruction E to Form S-8, this Registration Statement hereby incorporates
by reference the contents of the Registration Statement referenced above.
2
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form S-8 and has duly caused
this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of San Diego, State of California, on
the 13th day of March, 2009.
OPTIMER
  PHARMACEUTICALS, INC.
By:
/s/   MICHAEL N. CHANG
Michael N. Chang
President and
  Chief Executive Officer
POWER
OF ATTORNEY
KNOW ALL PERSONS
BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints Michael N. Chang and John D. Prunty, and each of them, as his true
and lawful attorneys in fact and agents, with full power of substitution and
resubstitution, for him and in his name, place, and stead, in any and all
capacities, to sign any and all amendments (including post effective
amendments, exhibits thereto and other documents in connection therewith) to
this Registration Statement, and to file the same, with all exhibits thereto,
and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys in fact and agents, and each of them,
full power and authority to do and perform each and every act and thing
requisite and necessary to be done in connection therewith, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys in fact and agents, or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
Pursuant to the
requirements of the Securities Act of 1933, this Registration Statement has
been signed by the following persons in the capacities and on the dates
indicated.
Signature
Title
Date
/s/ MICHAEL N. CHANG
President, Chief
  Executive Officer and Director
March 13,
  2009
Michael N. Chang
(Principal
  Executive Officer)
/s/ JOHN D. PRUNTY
Chief Financial
  Officer, Vice President, Finance
March 13,
  2009
John D. Prunty
and Secretary
  (Principal Accounting and
Financial
  Officer)
/s/ ANTHONY E. ALTIG
Director
March 13,
  2009
Anthony E. Altig
/s/ MARK AUERBACH
Director
March 13,
  2009
Mark Auerbach
/s/ JOSEPH Y. CHANG
Director
March 13,
  2009
Joseph Y. Chang
/s/ PETER E. GREBOW
Director
March 13,
  2009
Peter E. Grebow
/s/ ALAIN B. SCHREIBER
Director
March 13,
  2009
Alain B. Schreiber
EXHIBIT
INDEX
Exhibit
Number
4.1(1)
Certificate of
  Incorporation of Optimer Pharmaceuticals, Inc. as amended and restated.
4.2(2)
Bylaws of
  Optimer Pharmaceuticals, Inc., as amended.
4.3(3)
Common Stock
  Certificate of Optimer Pharmaceuticals, Inc.
4.4(4)
Investors'
  Rights Agreement by and among Optimer Pharmaceuticals, Inc. and certain
  stockholders of Optimer Pharmaceuticals, Inc., dated November 30,
  2005, as amended and restated.
4.5(5)
Registration
  Rights Agreement, dated October 23, 2007, by and between Optimer
  Pharmaceuticals, Inc. and the purchasers listed on the signature
  pages thereto.
4.6(6)
Form of
  Warrant issued to certain investors on March 9, 2009.
5.1
Opinion of
  Cooley Godward Kronish LLP.
23.1
Consent of
  Independent Registered Public Accounting Firm.
23.2
Consent of
  Cooley Godward Kronish LLP. Reference is made to Exhibit 5.1.
24.1
Power of
  Attorney. Reference is made to the signature page hereto.
(1)
Filed with
  Registrant's Amendment No. 3 to Registration Statement on Form S-1
  on January 22, 2007.
(2)
Filed with
  Registrant's Current Report on Form 8-K on September 18, 2007.
(3)
Filed with
  Registrant's Amendment No. 4 to Registration Statement on Form S-1
  on February 5, 2007.
(4)
Filed with
  Registrant's Amendment No. 3 to Registration Statement on Form S-1
  November 9, 2006.
(5)
Filed with
  Registrant's Current Report on Form 8-K on October 29, 2007.
(6)
Filed with
  Registrant's Current Report on Form 8-K on March 5, 2009.