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<DIV align="center" style="font-size: 10pt; margin-top: 12pt">As
filed with the Securities and Exchange Commission on August 5, 2011&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div>

<DIV align="right" style="font-size: 10pt; margin-top: 0pt">Registration No.&nbsp;333-&#95;&#95;&#95;&#95;&#95;
</DIV>


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




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

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

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT UNDER<BR>
THE SECURITIES ACT OF 1933</B>
</DIV>

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

<DIV align="center" style="font-size: 10pt">(Exact Name of Registrant as Specified in Its Charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>04-3072298</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or Other Jurisdiction of Incorporation
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">or Organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Identification No.)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><B>167 Sidney Street</B></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><B>Cambridge, Massachusetts</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>02139</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(Address of Principal Executive Offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Zip Code)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>2008 Stock Incentive Plan<BR>
1995 Employee Stock Purchase Plan</B><BR>
(Full Title of the Plan)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Sudhir Agrawal, D. Phil.<BR>
Chief Executive Officer<BR>
Idera Pharmaceuticals, Inc.<BR>
167 Sidney Street<BR>
Cambridge, Massachusetts 02139</B><BR>
(Name and Address of Agent For Service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>(617)&nbsp;679-5500</B><BR>
(Telephone Number, Including Area Code, of Agent For Service)</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See the definitions of &#147;large accelerated
filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule&nbsp;12b of the Exchange Act.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="22%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><FONT style="white-space: nowrap">Large accelerated filer <FONT style="font-family: Wingdings">&#111;</FONT></FONT>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">Accelerated filer <FONT style="font-family: Wingdings">&#254;</FONT></FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Non-accelerated filer <FONT style="font-family: Wingdings">&#111;</FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top"><FONT style="white-space: nowrap">Smaller reporting company <FONT style="font-family: Wingdings">&#111;</FONT></FONT></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">(Do not check if a smaller reporting company)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CALCULATION OF REGISTRATION FEE</B></DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="12%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="11%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="22%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="25%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="20%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="left">Title of Securities</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount to be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Offering Price Per</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Aggregate</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount of</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="left">to be Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registered(1)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Share</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Offering Price</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registration Fee</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD valign="top" style="border-top: 2px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock, $0.001
par value per share
(including the
associated Preferred
Stock Purchase
Rights), to be issued
pursuant to the Idera
Pharmaceuticals, Inc.
2008 Stock Incentive
Plan, as amended
</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 2px solid #000000" nowrap>2,300,000 shares(2)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" valign="top" style="border-top: 2px solid #000000">$1.95(3)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" valign="top" style="border-top: 2px solid #000000">$4,485,000(3)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" valign="top" style="border-top: 2px solid #000000">$521.00</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD valign="top" style="border-top: 2px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock, $0.001
par value per share
(including the
associated Preferred
Stock Purchase
Rights), to be issued
pursuant to the Idera
Pharmaceuticals, Inc.
1995 Employee Stock
Purchase Plan, as
amended
</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 2px solid #000000">250,000 shares(4)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" valign="top" style="border-top: 2px solid #000000">$1.95(3)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" valign="top" style="border-top: 2px solid #000000">$487,500(3)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" valign="top" style="border-top: 2px solid #000000">$57.00</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>

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

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>In accordance with Rule&nbsp;416 under the Securities Act of 1933, as amended, this
registration statement shall be deemed to cover any additional securities that may from time
to time be offered or issued to prevent dilution resulting from stock splits, stock dividends
or similar transactions.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Consists of 2,300,000 additional shares issuable under the 2008 Stock Incentive Plan.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(3)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c)
and 457(h) of the Securities Act of 1933, as amended, and based upon the average of the high
and low prices of the Registrant&#146;s Common Stock as reported on the Nasdaq Global Market on
August 1, 2011.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(4)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Consists of 250,000 additional shares issuable under the 1995 Employee Stock Purchase Plan.</TD>
</TR>

</TABLE>
</DIV>

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



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

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

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








<!--TOC-->
<!--/TOC-->




<!-- link1 "STATEMENT OF INCORPORATION BY REFERENCE" -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>STATEMENT OF INCORPORATION BY REFERENCE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement on Form S-8 is filed to register the offer and sale of (i)&nbsp;an
additional 2,300,000 shares of the Registrant&#146;s common stock, $0.001 par value per share, to be
issued under the Registrant&#146;s 2008 Stock Incentive Plan and (ii)&nbsp;an additional 250,000 shares of
the Registrant&#146;s common stock, $0.001 par value per share, to be issued under the Registrant&#146;s 1995
Employee Stock Purchase Plan. This Registration Statement incorporates by reference the contents
of (i)&nbsp;the registration statement on Form S-8, File No.&nbsp;333-152669, filed by the Registrant on July
31, 2008, relating to the Registrant&#146;s 2008 Stock Incentive Plan and (ii)&nbsp;the registration
statements on Form S-8, File Nos. 333-03896, 333-116011, 333-137687 and 333-152670 filed by the
Registrant on April&nbsp;23, 1996, May&nbsp;28, 2004, September&nbsp;29, 2006 and July&nbsp;31, 2008, respectively,
relating to the Registrant&#146;s 1995 Employee Stock Purchase Plan.
</DIV>
<!-- link2 "Item&nbsp;5. Interests of Named Experts and Counsel" -->

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;5. Interests of Named Experts and Counsel.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Wilmer Cutler Pickering Hale and Dorr LLP (&#147;WilmerHale&#148;) has opined as to the legality of the
securities being offered by this registration statement.
</DIV>
<!-- link2 "Item&nbsp;8. Exhibits" -->

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Item&nbsp;8. Exhibits.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Exhibit&nbsp;Index immediately preceding the exhibits is incorporated herein by reference.
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->- 2 -<!-- /Folio -->
</DIV>

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

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "SIGNATURES" -->

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


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, 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 Cambridge, Massachusetts on this 5<SUP style="FONT-size: 85%; vertical-align: text-top">th</SUP> day of August, 2011.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">IDERA PHARMACEUTICALS, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Sudhir Agrawal
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Sudhir Agrawal, D. Phil.&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

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



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We, the undersigned officers and directors of Idera Pharmaceuticals, Inc., hereby severally
constitute and appoint Sudhir Agrawal and Louis J. Arcudi, III, and each of them singly, our true
and lawful attorneys with full power to them, and each of them singly, to sign for us and in our
names in the capacities indicated below, the registration statement on Form S-8 filed herewith and
any and all subsequent amendments to said registration statement, and generally to do all such
things in our names and on our behalf in our capacities as officers and directors to enable Idera
Pharmaceuticals, Inc. to comply with the provisions of the Securities Act of 1933, as amended, and
all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our
signatures as they may be signed by our said attorneys, or any of them, to said registration
statement and any and all amendments thereto.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="35%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Sudhir Agrawal
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Sudhir Agrawal, D. Phil.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chairman, President and
Chief Executive Officer
(Principal Executive
Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;5, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Louis J. Arcudi, III
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Louis J. Arcudi, III
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Senior Vice President of
Operations, Chief
Financial Officer,
Treasurer and Secretary
(Principal Financial
Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;5, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Youssef El Zein
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;5, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Youssef El Zein
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ C. Keith Hartley
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;5, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
C. Keith Hartley
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->- 3 -<!-- /Folio -->
</DIV>

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

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

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="35%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Robert W. Karr
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;4, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Robert W. Karr, M.D.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Malcolm MacCoss
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;4, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Malcolm MacCoss, Ph.D.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Hans Mueller
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;4, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Hans Mueller, Ph.D.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ William S. Reardon
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;5, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William S. Reardon, C.P.A.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Eve E. Slater
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">August&nbsp;5, 2011</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Eve E. Slater, M.D., F.A.C.C.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
James B. Wyngaarden, M.D.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>







<P align="center" style="font-size: 10pt"><!-- Folio -->- 4 -<!-- /Folio -->
</DIV>

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

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



<!-- link1 "INDEX TO EXHIBITS" -->

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

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="88%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Description</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1(1)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Specimen Certificate for shares of Common Stock, $0.001 par value,
of Idera Pharmaceuticals, Inc.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2(2)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Rights Agreement dated December&nbsp;10, 2001 by and between Idera
Pharmaceuticals, Inc. and Mellon Investor Services LLC, as rights
agent.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3(3)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment No.&nbsp;1 to Rights Agreement dated as of August&nbsp;27, 2003
between Idera Pharmaceuticals, Inc. and Mellon Investor Services
LLC, as rights agent.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4 (4)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment No.&nbsp;2 to Rights Agreement dated as of March&nbsp;24, 2006
between Idera Pharmaceuticals, Inc. and Mellon Investor Services
LLC, as rights agent.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.5 (5)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amendment No.&nbsp;3 to Rights Agreement dated January&nbsp;16, 2007 between
Idera Pharmaceuticals, Inc. and Mellon Investor Services, LLC, as
rights agent.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Wilmer Cutler Pickering Hale and Dorr LLP, counsel to
the Registrant</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Wilmer Cutler Pickering Hale and Dorr LLP
(included in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Ernst &#038; Young LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of attorney (included on the signature pages of this
registration statement)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96%"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registration Statement on Form S-1, dated December&nbsp;8, 1995 (File No.&nbsp;33-99024) and
incorporated herein by reference.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant&#146;s Registration Statement on Form S-2, dated October&nbsp;10, 2003 (File No.&nbsp;333-109630)
and incorporated herein by reference.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant&#146;s Current Report on Form 8-K, dated August&nbsp;29, 2003 (File No.&nbsp;000-27352) and
incorporated herein by reference.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(4)</TD>
    <TD>&nbsp;</TD>
    <TD>Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant&#146;s Current Report on Form 8-K, dated March&nbsp;29, 2006 (File No.&nbsp;001-31918) and
incorporated herein by reference.</TD>
</TR>

</TABLE>


<P align="center" style="font-size: 10pt"><!-- Folio -->- 5 -<!-- /Folio -->
</DIV>

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





<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96%"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(5)</TD>
    <TD>&nbsp;</TD>
    <TD>Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant&#146;s Current Report on Form 8-K, dated January&nbsp;17, 2007 (File No.&nbsp;001-31918) and
incorporated herein by reference.</TD>
</TR>

</TABLE>


<P align="center" style="font-size: 10pt"><!-- Folio -->- 6 -<!-- /Folio -->
</DIV>

</BODY>
</HTML>
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sv8
As
filed with the Securities and Exchange Commission on August 5, 2011
Registration No. 333-_____
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933
Idera Pharmaceuticals, Inc.
(Exact Name of Registrant as Specified in Its Charter)
Delaware
04-3072298
(State or Other Jurisdiction of Incorporation
(I.R.S. Employer
or Organization)
Identification No.)
167 Sidney Street
Cambridge, Massachusetts
02139
(Address of Principal Executive Offices)
(Zip Code)
2008 Stock Incentive Plan
1995 Employee Stock Purchase Plan
(Full Title of the Plan)
Sudhir Agrawal, D. Phil.
Chief Executive Officer
Idera Pharmaceuticals, Inc.
167 Sidney Street
Cambridge, Massachusetts 02139
(Name and Address of Agent For Service)
(617) 679-5500
(Telephone Number, Including Area Code, of Agent For Service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated
filer," "accelerated filer" and "smaller reporting company" in Rule 12b of the Exchange Act.
Large accelerated filer
o
Accelerated filer
þ
Non-accelerated filer
o
Smaller reporting company
o
(Do not check if a smaller reporting company)
CALCULATION OF REGISTRATION FEE
Proposed
Proposed
Maximum
Maximum
Title of Securities
Amount to be
Offering Price Per
Aggregate
Amount of
to be Registered
Registered(1)
Share
Offering Price
Registration Fee
Common Stock, $0.001
par value per share
(including the
associated Preferred
Stock Purchase
Rights), to be issued
pursuant to the Idera
Pharmaceuticals, Inc.
2008 Stock Incentive
Plan, as amended
2,300,000 shares(2)
$1.95(3)
$4,485,000(3)
$521.00
Common Stock, $0.001
par value per share
(including the
associated Preferred
Stock Purchase
Rights), to be issued
pursuant to the Idera
Pharmaceuticals, Inc.
1995 Employee Stock
Purchase Plan, as
amended
250,000 shares(4)
$1.95(3)
$487,500(3)
$57.00
(1)
In accordance with Rule 416 under the Securities Act of 1933, as amended, this
registration statement shall be deemed to cover any additional securities that may from time
to time be offered or issued to prevent dilution resulting from stock splits, stock dividends
or similar transactions.
(2)
Consists of 2,300,000 additional shares issuable under the 2008 Stock Incentive Plan.
(3)
Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c)
and 457(h) of the Securities Act of 1933, as amended, and based upon the average of the high
and low prices of the Registrant's Common Stock as reported on the Nasdaq Global Market on
August 1, 2011.
(4)
Consists of 250,000 additional shares issuable under the 1995 Employee Stock Purchase Plan.
STATEMENT OF INCORPORATION BY REFERENCE
This Registration Statement on Form S-8 is filed to register the offer and sale of (i) an
additional 2,300,000 shares of the Registrant's common stock, $0.001 par value per share, to be
issued under the Registrant's 2008 Stock Incentive Plan and (ii) an additional 250,000 shares of
the Registrant's common stock, $0.001 par value per share, to be issued under the Registrant's 1995
Employee Stock Purchase Plan. This Registration Statement incorporates by reference the contents
of (i) the registration statement on Form S-8, File No. 333-152669, filed by the Registrant on July
31, 2008, relating to the Registrant's 2008 Stock Incentive Plan and (ii) the registration
statements on Form S-8, File Nos. 333-03896, 333-116011, 333-137687 and 333-152670 filed by the
Registrant on April 23, 1996, May 28, 2004, September 29, 2006 and July 31, 2008, respectively,
relating to the Registrant's 1995 Employee Stock Purchase Plan.
Item 5. Interests of Named Experts and Counsel.
Wilmer Cutler Pickering Hale and Dorr LLP ("WilmerHale") has opined as to the legality of the
securities being offered by this registration statement.
Item 8. Exhibits.
The Exhibit Index immediately preceding the exhibits is incorporated herein by reference.
- 2 -
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, 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 Cambridge, Massachusetts on this 5
th
day of August, 2011.
IDERA PHARMACEUTICALS, INC.
By:
/s/ Sudhir Agrawal
Sudhir Agrawal, D. Phil.
Chief Executive Officer
POWER OF ATTORNEY AND SIGNATURES
We, the undersigned officers and directors of Idera Pharmaceuticals, Inc., hereby severally
constitute and appoint Sudhir Agrawal and Louis J. Arcudi, III, and each of them singly, our true
and lawful attorneys with full power to them, and each of them singly, to sign for us and in our
names in the capacities indicated below, the registration statement on Form S-8 filed herewith and
any and all subsequent amendments to said registration statement, and generally to do all such
things in our names and on our behalf in our capacities as officers and directors to enable Idera
Pharmaceuticals, Inc. to comply with the provisions of the Securities Act of 1933, as amended, and
all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our
signatures as they may be signed by our said attorneys, or any of them, to said registration
statement and any and all amendments thereto.
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/ Sudhir Agrawal
Sudhir Agrawal, D. Phil.
Chairman, President and
Chief Executive Officer
(Principal Executive
Officer)
August 5, 2011
/s/ Louis J. Arcudi, III
Louis J. Arcudi, III
Senior Vice President of
Operations, Chief
Financial Officer,
Treasurer and Secretary
(Principal Financial
Officer)
August 5, 2011
/s/ Youssef El Zein
Director
August 5, 2011
Youssef El Zein
/s/ C. Keith Hartley
Director
August 5, 2011
C. Keith Hartley
- 3 -
Signature
Title
Date
/s/ Robert W. Karr
Director
August 4, 2011
Robert W. Karr, M.D.
/s/ Malcolm MacCoss
Director
August 4, 2011
Malcolm MacCoss, Ph.D.
/s/ Hans Mueller
Director
August 4, 2011
Hans Mueller, Ph.D.
/s/ William S. Reardon
Director
August 5, 2011
William S. Reardon, C.P.A.
/s/ Eve E. Slater
Director
August 5, 2011
Eve E. Slater, M.D., F.A.C.C.
Director
James B. Wyngaarden, M.D.
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INDEX TO EXHIBITS
Number
Description
4.1(1)
Specimen Certificate for shares of Common Stock, $0.001 par value,
of Idera Pharmaceuticals, Inc.
4.2(2)
Rights Agreement dated December 10, 2001 by and between Idera
Pharmaceuticals, Inc. and Mellon Investor Services LLC, as rights
agent.
4.3(3)
Amendment No. 1 to Rights Agreement dated as of August 27, 2003
between Idera Pharmaceuticals, Inc. and Mellon Investor Services
LLC, as rights agent.
4.4 (4)
Amendment No. 2 to Rights Agreement dated as of March 24, 2006
between Idera Pharmaceuticals, Inc. and Mellon Investor Services
LLC, as rights agent.
4.5 (5)
Amendment No. 3 to Rights Agreement dated January 16, 2007 between
Idera Pharmaceuticals, Inc. and Mellon Investor Services, LLC, as
rights agent.
5.1
Opinion of Wilmer Cutler Pickering Hale and Dorr LLP, counsel to
the Registrant
23.1
Consent of Wilmer Cutler Pickering Hale and Dorr LLP
(included in Exhibit 5.1)
23.2
Consent of Ernst & Young LLP
24.1
Power of attorney (included on the signature pages of this
registration statement)
(1)
Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registration Statement on Form S-1, dated December 8, 1995 (File No. 33-99024) and
incorporated herein by reference.
(2)
Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant's Registration Statement on Form S-2, dated October 10, 2003 (File No. 333-109630)
and incorporated herein by reference.
(3)
Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant's Current Report on Form 8-K, dated August 29, 2003 (File No. 000-27352) and
incorporated herein by reference.
(4)
Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant's Current Report on Form 8-K, dated March 29, 2006 (File No. 001-31918) and
incorporated herein by reference.
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(5)
Previously filed with the Securities and Exchange Commission as an Exhibit to the
Registrant's Current Report on Form 8-K, dated January 17, 2007 (File No. 001-31918) and
incorporated herein by reference.
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