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


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>As
filed with the Securities and Exchange Commission on March 16, 2007</B>
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 6pt"><B>Registration No.&nbsp;333-</B><U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt; margin-top: 6pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




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

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

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


<DIV align="Center" style="font-size: 12pt; margin-top: 6pt"><B>REGISTRATION STATEMENT<BR>
UNDER<BR>
THE SECURITIES ACT OF 1933</B>

</DIV>
<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>Sourcefire, 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%">
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<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>52-2289365</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other jurisdiction of
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">Incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Identification No.)</TD>
</TR>
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</TABLE>
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>9770 Patuxent Woods Drive<BR>
Columbia, Maryland 21046<BR>
(410)&nbsp;290-1616</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">(Address of principal executive offices)

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>Sourcefire, Inc. 2002 Stock Incentive Plan<BR>
Sourcefire, Inc. 2007 Stock Incentive Plan</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">(Full title of the Plan(s))

</DIV>
<DIV align="center" style="font-size: 10pt"><DIV style="width: 100%; border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV></DIV>



<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>E. Wayne Jackson, III<BR>
Chief Executive Officer<BR>
Sourcefire, Inc.<BR>
9770 Patuxent Woods Drive<BR>
Columbia, Maryland 21046</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">(Name and address of agent for service)

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>(410)&nbsp;290-1616</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">(Telephone number, including area code, of agent for service)

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><DIV style="width: 100%; border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV>

</DIV>

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

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" 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>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&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 nowrap align="center" colspan="3">Amount to</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">offering price</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">aggregate offering</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Amount of</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Title of Securities to be Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">be registered(1)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">per share(2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">price(2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">registration fee</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="center" style="border-top: 2px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock, par value $0.001 per share</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 colspan="3" nowrap align="center" style="border-top: 2px solid #000000">7,435,951 shares</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="right" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" style="border-top: 2px solid #000000">&nbsp;&nbsp;&nbsp;&nbsp;$17.54</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</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="right" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" style="border-top: 2px solid #000000">&nbsp;&nbsp;$130,426,580.54</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</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="right" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">&nbsp;&nbsp;$4004.10</TD>
    <TD nowrap style="border-top: 2px solid #000000">&nbsp;</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="23" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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



<DIV style="margin-top: 3pt">
<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>Includes 3,199,903 shares subject to Registrant&#146;s outstanding options, all of which were issued pursuant to
the Sourcefire, Inc. 2002 Stock Incentive Plan, 1,093,596 shares of common stock granted as
restricted stock awards, all of which were issued pursuant to the
Sourcefire, Inc. 2002 Stock Incentive Plan and 3,142,452 additional shares reserved for future issuance upon exercise of stock options to be
granted under the Sourcefire, Inc. 2007 Stock Incentive Plan.</TD>
</TR>

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

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Estimated solely for the purpose of calculating the registration fee. Pursuant to Rule 457(c) and Rule 457(h)
under the Securities Act, the proposed maximum offering price per share and the proposed maximum aggregate
offering price have been determined on the basis of the average of the high and low prices reported on the
Nasdaq Market on March&nbsp;13, 2007.</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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<DIV style="font-family: 'Times New Roman',Times,serif">

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


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE<BR>
SECTION 10(A) PROSPECTUS</B>

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The information required by Part&nbsp;I is included in the documents sent or given to participants
in the Sourcefire, Inc. 2002 Stock Incentive Plan and the Sourcefire, Inc. 2007 Stock Incentive
Plan, pursuant to Rule&nbsp;428(b)(1) under the Securities Act of 1933, as amended (the &#147;Securities
Act&#148;).
</DIV>

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


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE<BR>
REGISTRATION STATEMENT</B>

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;3. Incorporation of Documents by Reference.</I></B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant is subject to the informational and reporting requirements of Sections&nbsp;13(a),
14 and 15(d) of the Securities and Exchange Act of 1934, as amended (the &#147;Exchange Act&#148;), and in
accordance therewith files reports, proxy statements and other information with the Securities and
Exchange Commission (the &#147;Commission&#148;). The following documents, which are on file with the
Commission, are incorporated in this Registration Statement by reference:
</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="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>the Registrant&#146;s Prospectus dated March&nbsp;8, 2007 and
filed pursuant to Rule 424(b) under the
Securities Act relating to the Registrant&#146;s Registration Statement on Form S-1, as amended
(Registration No.&nbsp;333-138199); and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>the description of the Registrant&#146;s common stock
incorporated by reference in the Registrant&#146;s
registration statement on Form 8-A, filed with the Commission under Section&nbsp;12 of the
Exchange Act on March&nbsp;7, 2007, including any amendment or report filed for the purpose of
updating such description.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents subsequently filed by the Registrant pursuant to Sections&nbsp;13(a), 13(c), 14 and
15(d) of the Exchange Act after the date of this Registration Statement, and prior to the filing of
a post-effective amendment which indicates that all securities offered hereby have been sold or
which de-registers all securities then remaining unsold, shall be deemed to be incorporated by
reference in this Registration Statement and to be a part hereof from the date of filing of such
documents. Any statement contained in a document incorporated or deemed to be incorporated by
reference herein shall be deemed to be modified or superseded for purposes of this Registration
Statement to the extent that a statement contained herein or in any other subsequently filed
document which also is or is deemed to be incorporated by reference herein modifies or supersedes
such statement. Any statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Registration Statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;4. Description of Securities.</I></B>
</DIV>


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

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;5. Interests of Named Experts and Counsel.</I></B>
</DIV>


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

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;6. Indemnification of Directors and Officers.</I></B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Sourcefire is incorporated under the laws of the State of
    Delaware. Reference is made to Section&#160;102(b)(7) of the
    Delaware General Corporation Law, or DGCL, which enables a
    corporation in its original certificate of incorporation or an
    amendment thereto to eliminate or limit the personal liability
    of a director for violations of the director&#146;s fiduciary
    duty, except (1)&#160;for any breach of the director&#146;s duty
    of loyalty to the corporation or its stockholders, (2)&#160;for
    acts or omissions not in good faith or which involve intentional
    misconduct or a knowing violation of law, (3)&#160;pursuant to
    Section&#160;174 of the DGCL, which provides for liability of
    directors for unlawful payments of dividends of unlawful stock
    purchase or redemptions, or (4)&#160;for any transaction from
    which a director derived an improper personal benefit.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    Reference is also made to Section&#160;145 of the DGCL, which
    provides that a corporation may indemnify any person, including
    an officer or director, who is, or is threatened to be made,
    party to any threatened, pending or completed legal action, suit
    or proceeding, whether civil, criminal, administrative or
    investigative, other than an action by or in the right of such
    corporation, by reason of the fact that such person was an
    officer, director, employee or agent of such corporation or is
    or was serving at the request of such corporation as a director,
    officer, employee or agent of another corporation or enterprise.
    The indemnity may include expenses (including attorneys&#146;
    fees), judgments, fines and amounts paid in settlement actually
    and reasonably incurred by such person in connection with such
    action, suit or proceeding, provided such officer, director,
    employee or agent acted in good faith and in a manner he
    reasonably believed to be in, or not opposed to, the
    corporation&#146;s best interest and, for criminal proceedings,
    had no reasonable cause to believe that his conduct was
    unlawful. A Delaware corporation may indemnify any officer or
    director in an action by or in the right of the corporation
    under the same conditions, except that no indemnification is
    permitted without judicial approval if the officer or director
    is adjudged to be liable to the corporation. Where an officer or
    director is successful on the merits or otherwise in the defense
    of any action referred to above, the corporation must indemnify
    him against the expenses that such officer or director actually
    and reasonably incurred.
</DIV>


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

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

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;7. Exemption From Registration Claimed.</I></B>
</DIV>


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

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;8. Exhibits.</I></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="2%">&nbsp;</TD>
    <TD width="91%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Document</B></TD>
</TR>
<TR><TD style="font-size: 6pt">&nbsp;</Td></TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">3.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sixth Amended and Restated Certificate of Incorporation of Sourcefire, Inc. (filed herewith).</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">3.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed herewith).</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">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of stock certificate of
Registrant&#146;s Common Stock (filed as Exhibit&nbsp;4.1 to pre-effective Amendment No. 7 to the
Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended
(File No.&nbsp;333-138199) filed on March&nbsp;6, 2007 and
incorporated herein by this reference)</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sourcefire, Inc. 2002 Stock Incentive Plan (filed as Exhibit&nbsp;4.2 to the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File
No.&nbsp;333-138199) filed on October&nbsp;25, 2006 and incorporated herein
by this reference).</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sourcefire, Inc. 2007 Stock
Incentive Plan (filed as Exhibit&nbsp;4.3 to pre-effective Amendment
No. 6 to the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File
No.&nbsp;333-138199) filed on February&nbsp;28, 2007 and incorporated herein
by this reference).</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Nonstatutory Stock Option Grant Agreement under the 2002 Stock Incentive Plan (filed
as Exhibit&nbsp;4.4 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) filed on October&nbsp;25, 2006 and incorporated herein by this reference).</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Notice of Stock Option Award under the 2007 Stock Incentive Plan (filed as Exhibit
4.5 to pre-effective Amendment
No. 6 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended (File No.&nbsp;333-138199)
filed on February&nbsp;28, 2007 and incorporated herein by this reference).</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">4.6
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Notice of Restricted Stock Purchase Award under the 2007 Stock Incentive Plan (filed
as Exhibit&nbsp;4.6 to pre-effective Amendment
No. 6 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) filed on February&nbsp;28, 2007 and incorporated herein by this reference).</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">4.7
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Notice of Restricted Stock Purchase Award for Non-Employee Directors under the 2007
Stock Incentive Plan (filed as Exhibit&nbsp;4.7 to pre-effective Amendment
No. 6 to the Registrant&#146;s Registration Statement on
Form&nbsp;S-1, as amended (File No.&nbsp;333-138199) filed on February&nbsp;28, 2007 and incorporated herein by this reference).</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 Morrison &#038; Foerster LLP (filed herewith)</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 Morrision &#038; Foerster LLP (contained 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 (filed herewith)</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 signature page hereof)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /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="left" style="font-size: 10pt; margin-top: 12pt"><B><I>Item&nbsp;9. Undertakings.</I></B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;The undersigned registrant hereby undertakes:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 4%">(1)&nbsp;To file, during any period in which offers or sales are being made, a post-effective
amendment to this Registration Statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(i)&nbsp;To include any prospectus required by section 10(a)(3) of the Securities Act
of 1933;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(ii)&nbsp;To reflect in the prospectus any facts or events arising after the
effective date of the Registration Statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a fundamental
change in the information set forth in the Registration Statement; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">(iii)&nbsp;To include any material information with respect to the plan of
distribution not previously disclosed in the Registration Statement or any material
change to such information in the Registration Statement;
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is contained in periodic
reports filed with or furnished to the Commission by the registrant pursuant to Section&nbsp;13 or 15(d)
of the Exchange Act of 1934 that are incorporated by reference in the Registration Statement.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)&nbsp;That, for the purpose of determining any liability under the Securities Act of 1933,
each such post-effective amendment shall be deemed to be a new registration statement relating to
the securities offered therein, and the offering of such securities at that time shall be deemed to
be the initial bona fide offering thereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)&nbsp;To remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the offering.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;The undersigned registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the registrant&#146;s annual report pursuant
to section 13(a) or section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan&#146;s
annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is
incorporated by reference in the Registration Statement shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such securities at that
time shall be deemed to be the initial bona fide offering thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;Insofar as indemnification for liabilities arising under the Securities Act of 1933
may be permitted to directors, officers and controlling persons of the registrant pursuant to the
foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy as expressed in
the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer or controlling
person in connection with the securities being registered, the registrant will, unless in the
opinion of its counsel the matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is against public policy
as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such
issue.
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /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" 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 Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934,
the Registrant, Sourcefire, Inc., 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 Columbia,
Maryland, State of Maryland on March 16, 2007.
</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="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="left"><B>SOURCEFIRE, INC.</B></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">By:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ E. Wayne Jackson</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
E. Wayne Jackson
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chief Executive Officer</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


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


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each person whose signature appears below constitutes and appoints Todd P. Headley and Joseph
M. Boyle, and each of them, as attorneys-in-fact, each with the power of substitution, for him in
any and all capacities, to sign any amendment to this Registration Statement and to file the same,
with exhibits thereto and other documents in connection therewith, with the Commission, granting to
said attorneys-in-fact, 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 the said attorney-in-fact or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, this Registration Statement has been
signed by the following persons in the capacities and on the date 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="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="25%">&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">
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ E. Wayne Jackson, III
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chief Executive Officer and Director</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
E. Wayne Jackson, III
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(principal executive officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">/s/ Todd P. Headley
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chief Financial Officer and Treasurer
<br>(principal financial and accounting</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Todd P. Headley
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Martin F. Roesch</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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Martin F. Roesch
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chief Technology Officer and Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Asheem Chandna</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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Asheem Chandna
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
















<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Tim A. Guleri</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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Tim A. Guleri
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Joseph R. Chinnici</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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Joseph R. Chinnici
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Steven R. Polk</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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Steven R. Polk
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" 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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Arnold L. Punaro</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 align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Arnold L. Punaro
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;March
16, 2007</TD>
</TR>




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


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /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" 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="2%">&nbsp;</TD>
    <TD width="91%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Document</B></TD>
</TR>
<TR><TD style="font-size: 6pt">&nbsp;</Td></TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">3.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sixth Amended and Restated Certificate of Incorporation of Sourcefire, Inc. (filed herewith).</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">3.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed herewith).</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">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of stock certificate of
Registrant&#146;s Common Stock (filed as Exhibit&nbsp;4.1 to pre-effective Amendment No. 7 to the
Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended
(File No.&nbsp;333-138199) filed on March&nbsp;6, 2007 and
incorporated herein by this reference)</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sourcefire, Inc. 2002 Stock Incentive Plan (filed as Exhibit&nbsp;4.2 to the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File
No.&nbsp;333-138199) filed on October&nbsp;25, 2006 and incorporated herein
by this reference).</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sourcefire, Inc. 2007 Stock
Incentive Plan (filed as Exhibit&nbsp;4.3 to pre-effective Amendment
No. 6 to the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File
No.&nbsp;333-138199) filed on February&nbsp;28, 2007 and incorporated herein
by this reference).</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Nonstatutory Stock Option Grant Agreement under the 2002 Stock Incentive Plan (filed
as Exhibit&nbsp;4.4 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) filed on October&nbsp;25, 2006 and incorporated herein by this reference).</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
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Notice of Stock Option Award under the 2007 Stock Incentive Plan (filed as Exhibit
4.5 to pre-effective Amendment
No. 6 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended (File No.&nbsp;333-138199)
filed on February&nbsp;28, 2007 and incorporated herein by this reference).</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">4.6
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Notice of Restricted Stock Purchase Award under the 2007 Stock Incentive Plan (filed
as Exhibit&nbsp;4.6 to pre-effective Amendment
No. 6 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) filed on February&nbsp;28, 2007 and incorporated herein by this reference).</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">4.7
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Notice of Restricted Stock Purchase Award for Non-Employee Directors under the 2007
Stock Incentive Plan (filed as Exhibit&nbsp;4.7 to pre-effective Amendment
No. 6 to the Registrant&#146;s Registration Statement on
Form&nbsp;S-1, as amended (File No.&nbsp;333-138199) filed on February&nbsp;28, 2007 and incorporated herein by this reference).</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 Morrison &#038; Foerster LLP (filed herewith)</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 Morrision &#038; Foerster LLP (contained 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 (filed herewith)</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 signature page hereof)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


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

</BODY>
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sv8
As
filed with the Securities and Exchange Commission on March 16, 2007
Registration No. 333-
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
Sourcefire, Inc.
(Exact name of registrant as specified in its charter)
Delaware
52-2289365
(State or other jurisdiction of
(I.R.S. Employer
Incorporation or organization)
Identification No.)
9770 Patuxent Woods Drive
Columbia, Maryland 21046
(410) 290-1616
(Address of principal executive offices)
Sourcefire, Inc. 2002 Stock Incentive Plan
Sourcefire, Inc. 2007 Stock Incentive Plan
(Full title of the Plan(s))
E. Wayne Jackson, III
Chief Executive Officer
Sourcefire, Inc.
9770 Patuxent Woods Drive
Columbia, Maryland 21046
(Name and address of agent for service)
(410) 290-1616
(Telephone number, including area code, of agent for service)
CALCULATION OF REGISTRATION FEE
Proposed maximum
Proposed maximum
Amount to
offering price
aggregate offering
Amount of
Title of Securities to be Registered
be registered(1)
per share(2)
price(2)
registration fee
Common Stock, par value $0.001 per share
7,435,951 shares
$17.54
$130,426,580.54
$4004.10
(1)
Includes 3,199,903 shares subject to Registrant's outstanding options, all of which were issued pursuant to
the Sourcefire, Inc. 2002 Stock Incentive Plan, 1,093,596 shares of common stock granted as
restricted stock awards, all of which were issued pursuant to the
Sourcefire, Inc. 2002 Stock Incentive Plan and 3,142,452 additional shares reserved for future issuance upon exercise of stock options to be
granted under the Sourcefire, Inc. 2007 Stock Incentive Plan.
(2)
Estimated solely for the purpose of calculating the registration fee. Pursuant to Rule 457(c) and Rule 457(h)
under the Securities Act, the proposed maximum offering price per share and the proposed maximum aggregate
offering price have been determined on the basis of the average of the high and low prices reported on the
Nasdaq Market on March 13, 2007.
PART I
INFORMATION REQUIRED IN THE
SECTION 10(A) PROSPECTUS
The information required by Part I is included in the documents sent or given to participants
in the Sourcefire, Inc. 2002 Stock Incentive Plan and the Sourcefire, Inc. 2007 Stock Incentive
Plan, pursuant to Rule 428(b)(1) under the Securities Act of 1933, as amended (the "Securities
Act").
PART II
INFORMATION REQUIRED IN THE
REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference.
The Registrant is subject to the informational and reporting requirements of Sections 13(a),
14 and 15(d) of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), and in
accordance therewith files reports, proxy statements and other information with the Securities and
Exchange Commission (the "Commission"). The following documents, which are on file with the
Commission, are incorporated in this Registration Statement by reference:
•
the Registrant's Prospectus dated March 8, 2007 and
filed pursuant to Rule 424(b) under the
Securities Act relating to the Registrant's Registration Statement on Form S-1, as amended
(Registration No. 333-138199); and
•
the description of the Registrant's common stock
incorporated by reference in the Registrant's
registration statement on Form 8-A, filed with the Commission under Section 12 of the
Exchange Act on March 7, 2007, including any amendment or report filed for the purpose of
updating such description.
All documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and
15(d) of the Exchange Act after the date of this Registration Statement, and prior to the filing of
a post-effective amendment which indicates that all securities offered hereby have been sold or
which de-registers all securities then remaining unsold, shall be deemed to be incorporated by
reference in this Registration Statement and to be a part hereof from the date of filing of such
documents. Any statement contained in a document incorporated or deemed to be incorporated by
reference herein shall be deemed to be modified or superseded for purposes of this Registration
Statement to the extent that a statement contained herein or in any other subsequently filed
document which also is or is deemed to be incorporated by reference herein modifies or supersedes
such statement. Any statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Registration Statement.
Item 4. Description of Securities.
Not applicable.
Item 5. Interests of Named Experts and Counsel.
Not applicable.
Item 6. Indemnification of Directors and Officers.
Sourcefire is incorporated under the laws of the State of
    Delaware. Reference is made to Section 102(b)(7) of the
    Delaware General Corporation Law, or DGCL, which enables a
    corporation in its original certificate of incorporation or an
    amendment thereto to eliminate or limit the personal liability
    of a director for violations of the director's fiduciary
    duty, except (1) for any breach of the director's duty
    of loyalty to the corporation or its stockholders, (2) for
    acts or omissions not in good faith or which involve intentional
    misconduct or a knowing violation of law, (3) pursuant to
    Section 174 of the DGCL, which provides for liability of
    directors for unlawful payments of dividends of unlawful stock
    purchase or redemptions, or (4) for any transaction from
    which a director derived an improper personal benefit.
Reference is also made to Section 145 of the DGCL, which
    provides that a corporation may indemnify any person, including
    an officer or director, who is, or is threatened to be made,
    party to any threatened, pending or completed legal action, suit
    or proceeding, whether civil, criminal, administrative or
    investigative, other than an action by or in the right of such
    corporation, by reason of the fact that such person was an
    officer, director, employee or agent of such corporation or is
    or was serving at the request of such corporation as a director,
    officer, employee or agent of another corporation or enterprise.
    The indemnity may include expenses (including attorneys'
    fees), judgments, fines and amounts paid in settlement actually
    and reasonably incurred by such person in connection with such
    action, suit or proceeding, provided such officer, director,
    employee or agent acted in good faith and in a manner he
    reasonably believed to be in, or not opposed to, the
    corporation's best interest and, for criminal proceedings,
    had no reasonable cause to believe that his conduct was
    unlawful. A Delaware corporation may indemnify any officer or
    director in an action by or in the right of the corporation
    under the same conditions, except that no indemnification is
    permitted without judicial approval if the officer or director
    is adjudged to be liable to the corporation. Where an officer or
    director is successful on the merits or otherwise in the defense
    of any action referred to above, the corporation must indemnify
    him against the expenses that such officer or director actually
    and reasonably incurred.
Item 7. Exemption From Registration Claimed.
Not applicable.
Item 8. Exhibits.
Exhibit
Number
Document
3.1
Sixth Amended and Restated Certificate of Incorporation of Sourcefire, Inc. (filed herewith).
3.2
Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed herewith).
4.1
Form of stock certificate of
Registrant's Common Stock (filed as Exhibit 4.1 to pre-effective Amendment No. 7 to the
Registrant's Registration Statement on Form S-1, as amended
(File No. 333-138199) filed on March 6, 2007 and
incorporated herein by this reference)
4.2
Sourcefire, Inc. 2002 Stock Incentive Plan (filed as Exhibit 4.2 to the Registrant's
Registration Statement on Form S-1, as amended (File
No. 333-138199) filed on October 25, 2006 and incorporated herein
by this reference).
4.3
Sourcefire, Inc. 2007 Stock
Incentive Plan (filed as Exhibit 4.3 to pre-effective Amendment
No. 6 to the Registrant's
Registration Statement on Form S-1, as amended (File
No. 333-138199) filed on February 28, 2007 and incorporated herein
by this reference).
4.4
Form of Nonstatutory Stock Option Grant Agreement under the 2002 Stock Incentive Plan (filed
as Exhibit 4.4 to the Registrant's Registration Statement on Form S-1, as amended (File No.
333-138199) filed on October 25, 2006 and incorporated herein by this reference).
4.5
Form of Notice of Stock Option Award under the 2007 Stock Incentive Plan (filed as Exhibit
4.5 to pre-effective Amendment
No. 6 to the Registrant's Registration Statement on Form S-1, as amended (File No. 333-138199)
filed on February 28, 2007 and incorporated herein by this reference).
4.6
Form of Notice of Restricted Stock Purchase Award under the 2007 Stock Incentive Plan (filed
as Exhibit 4.6 to pre-effective Amendment
No. 6 to the Registrant's Registration Statement on Form S-1, as amended (File No.
333-138199) filed on February 28, 2007 and incorporated herein by this reference).
4.7
Form of Notice of Restricted Stock Purchase Award for Non-Employee Directors under the 2007
Stock Incentive Plan (filed as Exhibit 4.7 to pre-effective Amendment
No. 6 to the Registrant's Registration Statement on
Form S-1, as amended (File No. 333-138199) filed on February 28, 2007 and incorporated herein by this reference).
5.1
Opinion of Morrison & Foerster LLP (filed herewith)
23.1
Consent of Morrision & Foerster LLP (contained in Exhibit 5.1)
23.2
Consent of Ernst & Young LLP (filed herewith)
24.1
Power of Attorney (included on signature page hereof)
Item 9. Undertakings.
(a) The undersigned registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a post-effective
amendment to this Registration Statement:
(i) To include any prospectus required by section 10(a)(3) of the Securities Act
of 1933;
(ii) To reflect in the prospectus any facts or events arising after the
effective date of the Registration Statement (or the most recent post-effective
amendment thereof) which, individually or in the aggregate, represent a fundamental
change in the information set forth in the Registration Statement; and
(iii) To include any material information with respect to the plan of
distribution not previously disclosed in the Registration Statement or any material
change to such information in the Registration Statement;
provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is contained in periodic
reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or 15(d)
of the Exchange Act of 1934 that are incorporated by reference in the Registration Statement.
(2) That, for the purpose of determining any liability under the Securities Act of 1933,
each such post-effective amendment shall be deemed to be a new registration statement relating to
the securities offered therein, and the offering of such securities at that time shall be deemed to
be the initial bona fide offering thereof.
(3) To remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the offering.
(b) The undersigned registrant hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the registrant's annual report pursuant
to section 13(a) or section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is
incorporated by reference in the Registration Statement shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such securities at that
time shall be deemed to be the initial bona fide offering thereof.
(c) Insofar as indemnification for liabilities arising under the Securities Act of 1933
may be permitted to directors, officers and controlling persons of the registrant pursuant to the
foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public policy as expressed in
the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer or controlling
person in connection with the securities being registered, the registrant will, unless in the
opinion of its counsel the matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is against public policy
as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such
issue.
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934,
the Registrant, Sourcefire, Inc., 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 Columbia,
Maryland, State of Maryland on March 16, 2007.
SOURCEFIRE, INC.
By:
/s/ E. Wayne Jackson
E. Wayne Jackson
Chief Executive Officer
POWER OF ATTORNEY
Each person whose signature appears below constitutes and appoints Todd P. Headley and Joseph
M. Boyle, and each of them, as attorneys-in-fact, each with the power of substitution, for him in
any and all capacities, to sign any amendment to this Registration Statement and to file the same,
with exhibits thereto and other documents in connection therewith, with the Commission, granting to
said attorneys-in-fact, 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 the said attorney-in-fact or his
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act, this Registration Statement has been
signed by the following persons in the capacities and on the date indicated.
Signature
Title
Date
/s/ E. Wayne Jackson, III
Chief Executive Officer and Director
E. Wayne Jackson, III
(principal executive officer)
March
16, 2007
/s/ Todd P. Headley
Chief Financial Officer and Treasurer
(principal financial and accounting
Todd P. Headley
officer)
March
16, 2007
/s/ Martin F. Roesch
Martin F. Roesch
Chief Technology Officer and Director
March
16, 2007
/s/ Asheem Chandna
Asheem Chandna
Director
March
16, 2007
/s/ Tim A. Guleri
Tim A. Guleri
Director
March
16, 2007
/s/ Joseph R. Chinnici
Joseph R. Chinnici
Director
March
16, 2007
/s/ Steven R. Polk
Steven R. Polk
Director
March
16, 2007
/s/ Arnold L. Punaro
Arnold L. Punaro
Director
March
16, 2007
INDEX TO EXHIBITS
Exhibit
Number
Document
3.1
Sixth Amended and Restated Certificate of Incorporation of Sourcefire, Inc. (filed herewith).
3.2
Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed herewith).
4.1
Form of stock certificate of
Registrant's Common Stock (filed as Exhibit 4.1 to pre-effective Amendment No. 7 to the
Registrant's Registration Statement on Form S-1, as amended
(File No. 333-138199) filed on March 6, 2007 and
incorporated herein by this reference)
4.2
Sourcefire, Inc. 2002 Stock Incentive Plan (filed as Exhibit 4.2 to the Registrant's
Registration Statement on Form S-1, as amended (File
No. 333-138199) filed on October 25, 2006 and incorporated herein
by this reference).
4.3
Sourcefire, Inc. 2007 Stock
Incentive Plan (filed as Exhibit 4.3 to pre-effective Amendment
No. 6 to the Registrant's
Registration Statement on Form S-1, as amended (File
No. 333-138199) filed on February 28, 2007 and incorporated herein
by this reference).
4.4
Form of Nonstatutory Stock Option Grant Agreement under the 2002 Stock Incentive Plan (filed
as Exhibit 4.4 to the Registrant's Registration Statement on Form S-1, as amended (File No.
333-138199) filed on October 25, 2006 and incorporated herein by this reference).
4.5
Form of Notice of Stock Option Award under the 2007 Stock Incentive Plan (filed as Exhibit
4.5 to pre-effective Amendment
No. 6 to the Registrant's Registration Statement on Form S-1, as amended (File No. 333-138199)
filed on February 28, 2007 and incorporated herein by this reference).
4.6
Form of Notice of Restricted Stock Purchase Award under the 2007 Stock Incentive Plan (filed
as Exhibit 4.6 to pre-effective Amendment
No. 6 to the Registrant's Registration Statement on Form S-1, as amended (File No.
333-138199) filed on February 28, 2007 and incorporated herein by this reference).
4.7
Form of Notice of Restricted Stock Purchase Award for Non-Employee Directors under the 2007
Stock Incentive Plan (filed as Exhibit 4.7 to pre-effective Amendment
No. 6 to the Registrant's Registration Statement on
Form S-1, as amended (File No. 333-138199) filed on February 28, 2007 and incorporated herein by this reference).
5.1
Opinion of Morrison & Foerster LLP (filed herewith)
23.1
Consent of Morrision & Foerster LLP (contained in Exhibit 5.1)
23.2
Consent of Ernst & Young LLP (filed herewith)
24.1
Power of Attorney (included on signature page hereof)