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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 January
7, 2008</B>
</DIV>


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


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 3pt">&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: 12pt"><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%">
<!-- Begin Table Head -->
<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><BR>
(State or other jurisdiction of <BR>
Incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>52-2289365</B><BR>
(I.R.S. Employer<BR>
Identification No.)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>9770 Patuxent Woods Drive<BR>
Columbia, Maryland 21046<BR>
(410)&nbsp;290-1616</B><BR>
(Address of principal executive offices)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Sourcefire, Inc. 2007 Employee Stock Purchase Plan</B><BR>
(Full title of the Plan(s))</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Douglas
W. McNitt<BR>
General Counsel and Secretary<BR>
Sourcefire, Inc.<BR>
9770 Patuxent Woods Drive<BR>
Columbia, Maryland 21046</B><BR>
(Name and address of agent for service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>(410)&nbsp;290-1616</B><BR>
(Telephone number, including area code, of agent for service)</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="54%">&nbsp;</TD>
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    <TD width="2%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="7%">&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 maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed 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>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount to</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">aggregate offering</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">Title of Securities to be Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">be registered(1)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">per share(2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">price(2)</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>

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<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">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 align="center" valign="top" nowrap style="border-top: 2px solid #000000">1,000,000 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="center" valign="top" style="border-top: 2px solid #000000">$8.07</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">$8,070,000</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">$317.15</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>

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</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>Such shares reserved for future issuance upon exercise of options to be granted under the Sourcefire, Inc. 2007
Employee Stock Purchase 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 January&nbsp;3, 2008.</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. 2007 Employee Stock Purchase 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, except that we do not
incorporate any document or portion of a document that is &#147;furnished&#148; to the Commission, but not
deemed &#147;filed&#148;:
</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, filed on March&nbsp;8, 2007, 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 Registrant&#146;s Quarterly Reports on Form 10-Q for the quarters ended March&nbsp;31, 2007,
June&nbsp;30, 2007 and September&nbsp;30, 2007; 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 Registrant&#146;s Current Reports on Form 8-K, other than information furnished pursuant
to Item&nbsp;2.02 or Item&nbsp;7.01 of Form 8-K, filed since March&nbsp;8, 2007.</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>

<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;6. Indemnification of Directors and Officers.</I></B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;102(b)(7) of the Delaware General Corporation Law (the &#147;DGCL&#148;) enables a Delaware
corporation to provide in its certificate of incorporation for the elimination or limitation of the
personal liability of a director to the corporation or its stockholders for monetary damages for
breach of fiduciary duty as a director. Any such provision cannot eliminate or limit a director&#146;s
liability: (1)&nbsp;for any breach of the director&#146;s duty of loyalty to the corporation or its
stockholders; (2)&nbsp;for acts or omissions not in good faith or which involve intentional misconduct
or a knowing violation of law; (3)&nbsp;under Section&nbsp;174 of the DGCL (which imposes liability on
directors for unlawful payment of dividends or unlawful stock purchase or redemption); or (4)&nbsp;for
any transaction from which the director derived an improper personal benefit. Article&nbsp;Seven of the
Registrant&#146;s Sixth Amended and Restated Certificate of Incorporation, as amended (the &#147;Charter&#148;),
eliminates the personal liability of each of the Registrant&#146;s directors to the Registrant and its
stockholders for monetary damages for breach of fiduciary duty as a director to the full extent
permitted by Delaware Law.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;145 of the DGCL provides that a corporation has the power to indemnify a director,
officer, employee or agent of the corporation and certain other persons serving at the request of
the corporation in related capacities against amounts paid and expenses incurred in connection with
an action or proceeding to which he is or is threatened to be made a party by reason of such
position, if such person shall have acted in good faith and in a manner he reasonably believed to
be in or not opposed to the best interests of the corporation and, in any criminal proceeding, if
such person had no reasonable cause to believe his conduct was unlawful; provided that, in the case
of actions brought by or in the right of the corporation, no indemnification shall be made with
respect to any matter as to which such person shall have been adjudged to be liable to the
corporation unless and only to the extent that the adjudicating court determines that such
indemnification is proper under the circumstances.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Article&nbsp;Eight of the Registrant&#146;s Charter provides for the indemnification of any person who
is or was a director, officer or agent of the Registrant to the fullest extent authorized by the
DGCL. Article&nbsp;Five of the Registrant&#146;s Fourth Amended and Restated Bylaws (the &#147;Bylaws&#148;) provides
for the indemnification of any person who is or was a director, officer, employee or agent of the
Registrant to the fullest extent authorized by the DGCL.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In addition to the indemnification provided in the Registrant&#146;s Charter and Bylaws and by
Delaware law, the Registrant has entered into indemnification agreements with its directors and
executive officers to provide additional contractual assurances regarding the scope of
indemnification and to provide additional procedural protections.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant also carries insurance policies that cover its individual directors and
officers for legal liability and which would pay on their behalf for expenses of indemnifying them
in accordance with the Charter, the Bylaws and Delaware law.
</DIV>

<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>

<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;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="8%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="90%">&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>

<!-- End Table Head -->
<!-- Begin Table Body -->
<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">Sixth Amended and Restated Certificate of Incorporation of
Sourcefire, Inc. (filed as Exhibit&nbsp;3.1 to the Registrant&#146;s
Quarterly Report on Form&nbsp;10-Q for the quarter ended March&nbsp;31,
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">Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed as
Exhibit&nbsp;3.2 to the Registrant&#146;s Quarterly Report on Form&nbsp;10-Q for
the quarter ended March&nbsp;31, 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">4.3
</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 the Registrant&#146;s Registration Statement on Form
S-1, as amended (File No.&nbsp;333-138199) 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">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) 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">Sourcefire, Inc. 2007 Stock Incentive Plan (filed as Exhibit&nbsp;4.3
to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended
(File No.&nbsp;333-138199) 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 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) 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 Stock Option Award under the 2007 Stock
Incentive Plan (filed as Exhibit&nbsp;4.5 to the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) 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">4.8
</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 the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) 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">4.9
</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
4.7 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as
amended (File No.&nbsp;333-138199) 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">4.10
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sourcefire, Inc. 2007 Employee Stock Purchase Plan (filed as
Exhibit&nbsp;10.1 to the Registrant&#146;s Current Report on Form&nbsp;8-K, filed
with the Commission on October&nbsp;4, 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 Morrison &#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>

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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;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>



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<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 January 7, 2008.
</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"><B>SOURCEFIRE, INC.</B><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">
&nbsp;/s/&nbsp;&nbsp;E. Wayne Jackson&nbsp;&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">E. Wayne Jackson&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</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 Douglas
W. McNitt, 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="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&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="bottom" align="center"><DIV style="margin-left:0px; text-indent:-0px">/s/ E. Wayne Jackson, III
<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">Chief Executive Officer and Director (principal
executive officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 7, 2008</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"><!-- 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" align="center">
<DIV style="margin-left:0px; text-indent:-0px">/s/ Todd
P. Headley
<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">Chief Financial Officer and Treasurer
(principal financial and accounting
officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 7, 2008</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" style="font-size:6pt"><!-- 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" align="center"><DIV style="margin-left:0px; text-indent:-0px">
/s/ Martin F. Roesch<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">&nbsp;Chief
Technology Officer and Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 7, 2008</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" style="font-size:6pt"><!-- 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" align="center">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Asheem Chandna<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Asheem Chandna
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 2, 2008</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


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

<!-- PAGEBREAK -->
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<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="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&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" style="font-size:6pt"><!-- 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" align="center"><DIV style="margin-left:0px; text-indent:-0px">/s/
Tim A. Guleri
         <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">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 7, 2008</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" style="font-size:6pt"><!-- 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" align="center"><DIV style="margin-left:0px; text-indent:-0px">/s/
Joseph R. Chinnici<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">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 2, 2008</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" style="font-size:6pt"><!-- 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" align="center"><DIV style="margin-left:0px; text-indent:-0px">/s/
Steven R. Polk<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">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 7, 2008</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" style="font-size:6pt"><!-- 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" align="center"><DIV style="margin-left:0px; text-indent:-0px">/s/
Arnold L. Punaro<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">&nbsp;Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">January 1, 2008</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</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">


<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="5%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="97%">&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>

<!-- End Table Head -->
<!-- Begin Table Body -->
<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">Sixth Amended and Restated Certificate of Incorporation of
Sourcefire, Inc. (filed as Exhibit&nbsp;3.1 to the Registrant&#146;s
Quarterly Report on Form&nbsp;10-Q for the quarter ended March&nbsp;31,
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">Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed as
Exhibit&nbsp;3.2 to the Registrant&#146;s Quarterly Report on Form&nbsp;10-Q for
the quarter ended March&nbsp;31, 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">4.3
</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 the Registrant&#146;s Registration Statement on Form
S-1, as amended (File No.&nbsp;333-138199) 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">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) 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">Sourcefire, Inc. 2007 Stock Incentive Plan (filed as Exhibit&nbsp;4.3
to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as amended
(File No.&nbsp;333-138199) 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 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) 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 Stock Option Award under the 2007 Stock
Incentive Plan (filed as Exhibit&nbsp;4.5 to the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) 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">4.8
</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 the Registrant&#146;s
Registration Statement on Form&nbsp;S-1, as amended (File No.
333-138199) 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">4.9
</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
4.7 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1, as
amended (File No.&nbsp;333-138199) 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">4.10
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sourcefire, Inc. 2007 Employee Stock Purchase Plan (filed as
Exhibit&nbsp;10.1 to the Registrant&#146;s Current Report on Form&nbsp;8-K, filed
with the Commission on October&nbsp;4, 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 Morrison &#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>

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sv8
As filed with the Securities and Exchange Commission on January
7, 2008
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
(State or other jurisdiction of
Incorporation or organization)
52-2289365
(I.R.S. Employer
Identification No.)
9770 Patuxent Woods Drive
Columbia, Maryland 21046
(410) 290-1616
(Address of principal executive offices)
Sourcefire, Inc. 2007 Employee Stock Purchase Plan
(Full title of the Plan(s))
Douglas
W. McNitt
General Counsel and Secretary
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
1,000,000 shares
$8.07
$8,070,000
$317.15
(1)
Such shares reserved for future issuance upon exercise of options to be granted under the Sourcefire, Inc. 2007
Employee Stock Purchase 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 January 3, 2008.
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. 2007 Employee Stock Purchase 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, except that we do not
incorporate any document or portion of a document that is "furnished" to the Commission, but not
deemed "filed":
•
the Registrant's Prospectus, filed on March 8, 2007, 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 Registrant's Quarterly Reports on Form 10-Q for the quarters ended March 31, 2007,
June 30, 2007 and September 30, 2007; and
•
the Registrant's Current Reports on Form 8-K, other than information furnished pursuant
to Item 2.02 or Item 7.01 of Form 8-K, filed since March 8, 2007.
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.
Section 102(b)(7) of the Delaware General Corporation Law (the "DGCL") enables a Delaware
corporation to provide in its certificate of incorporation for the elimination or limitation of the
personal liability of a director to the corporation or its stockholders for monetary damages for
breach of fiduciary duty as a director. Any such provision cannot eliminate or limit a director's
liability: (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) under Section 174 of the DGCL (which imposes liability on
directors for unlawful payment of dividends or unlawful stock purchase or redemption); or (4) for
any transaction from which the director derived an improper personal benefit. Article Seven of the
Registrant's Sixth Amended and Restated Certificate of Incorporation, as amended (the "Charter"),
eliminates the personal liability of each of the Registrant's directors to the Registrant and its
stockholders for monetary damages for breach of fiduciary duty as a director to the full extent
permitted by Delaware Law.
Section 145 of the DGCL provides that a corporation has the power to indemnify a director,
officer, employee or agent of the corporation and certain other persons serving at the request of
the corporation in related capacities against amounts paid and expenses incurred in connection with
an action or proceeding to which he is or is threatened to be made a party by reason of such
position, if such person shall have acted in good faith and in a manner he reasonably believed to
be in or not opposed to the best interests of the corporation and, in any criminal proceeding, if
such person had no reasonable cause to believe his conduct was unlawful; provided that, in the case
of actions brought by or in the right of the corporation, no indemnification shall be made with
respect to any matter as to which such person shall have been adjudged to be liable to the
corporation unless and only to the extent that the adjudicating court determines that such
indemnification is proper under the circumstances.
Article Eight of the Registrant's Charter provides for the indemnification of any person who
is or was a director, officer or agent of the Registrant to the fullest extent authorized by the
DGCL. Article Five of the Registrant's Fourth Amended and Restated Bylaws (the "Bylaws") provides
for the indemnification of any person who is or was a director, officer, employee or agent of the
Registrant to the fullest extent authorized by the DGCL.
In addition to the indemnification provided in the Registrant's Charter and Bylaws and by
Delaware law, the Registrant has entered into indemnification agreements with its directors and
executive officers to provide additional contractual assurances regarding the scope of
indemnification and to provide additional procedural protections.
The Registrant also carries insurance policies that cover its individual directors and
officers for legal liability and which would pay on their behalf for expenses of indemnifying them
in accordance with the Charter, the Bylaws and Delaware law.
Item 7. Exemption From Registration Claimed.
Not applicable.
Item 8. Exhibits.
Exhibit
Number
Document
4.1
Sixth Amended and Restated Certificate of Incorporation of
Sourcefire, Inc. (filed as Exhibit 3.1 to the Registrant's
Quarterly Report on Form 10-Q for the quarter ended March 31,
2007, and incorporated herein by this reference).
4.2
Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed as
Exhibit 3.2 to the Registrant's Quarterly Report on Form 10-Q for
the quarter ended March 31, 2007, and incorporated herein by this
reference).
4.3
Form of stock certificate of Registrant's Common Stock (filed as
Exhibit 4.1 to the Registrant's Registration Statement on Form
S-1, as amended (File No. 333-138199) and incorporated herein by
this reference)
4.4
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) and incorporated herein by this reference).
4.5
Sourcefire, Inc. 2007 Stock Incentive Plan (filed as Exhibit 4.3
to the Registrant's Registration Statement on Form S-1, as amended
(File No. 333-138199) and incorporated herein by this reference).
4.6
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) and incorporated herein by this reference).
4.7
Form of Notice of Stock Option Award under the 2007 Stock
Incentive Plan (filed as Exhibit 4.5 to the Registrant's
Registration Statement on Form S-1, as amended (File No.
333-138199) and incorporated herein by this reference).
4.8
Form of Notice of Restricted Stock Purchase Award under the 2007
Stock Incentive Plan (filed as Exhibit 4.6 to the Registrant's
Registration Statement on Form S-1, as amended (File No.
333-138199) and incorporated herein by this reference).
4.9
Form of Notice of Restricted Stock Purchase Award for Non-Employee
Directors under the 2007 Stock Incentive Plan (filed as Exhibit
4.7 to the Registrant's Registration Statement on Form S-1, as
amended (File No. 333-138199) and incorporated herein by this
reference).
4.10
Sourcefire, Inc. 2007 Employee Stock Purchase Plan (filed as
Exhibit 10.1 to the Registrant's Current Report on Form 8-K, filed
with the Commission on October 4, 2007, and incorporated herein by
this reference)
5.1
Opinion of Morrison & Foerster LLP (filed herewith)
23.1
Consent of Morrison & 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 January 7, 2008.
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 Douglas
W. McNitt, 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
E.
Wayne Jackson, III
Chief Executive Officer and Director (principal
executive officer)
January 7, 2008
/s/ Todd
P. Headley
Todd
P. Headley
Chief Financial Officer and Treasurer
(principal financial and accounting
officer)
January 7, 2008
/s/ Martin F. Roesch
Martin F. Roesch
Chief
Technology Officer and Director
January 7, 2008
/s/ Asheem Chandna
Asheem Chandna
Director
January 2, 2008
Signature
Title
Date
/s/
Tim A. Guleri
Tim A. Guleri
Director
January 7, 2008
/s/
Joseph R. Chinnici
Joseph R. Chinnici
Director
January 2, 2008
/s/
Steven R. Polk
Steven R. Polk
Director
January 7, 2008
/s/
Arnold L. Punaro
Arnold L. Punaro
Director
January 1, 2008
INDEX TO EXHIBITS
Exhibit
Number
Document
4.1
Sixth Amended and Restated Certificate of Incorporation of
Sourcefire, Inc. (filed as Exhibit 3.1 to the Registrant's
Quarterly Report on Form 10-Q for the quarter ended March 31,
2007, and incorporated herein by this reference).
4.2
Fourth Amended and Restated Bylaws of Sourcefire, Inc. (filed as
Exhibit 3.2 to the Registrant's Quarterly Report on Form 10-Q for
the quarter ended March 31, 2007, and incorporated herein by this
reference).
4.3
Form of stock certificate of Registrant's Common Stock (filed as
Exhibit 4.1 to the Registrant's Registration Statement on Form
S-1, as amended (File No. 333-138199) and incorporated herein by
this reference)
4.4
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) and incorporated herein by this reference).
4.5
Sourcefire, Inc. 2007 Stock Incentive Plan (filed as Exhibit 4.3
to the Registrant's Registration Statement on Form S-1, as amended
(File No. 333-138199) and incorporated herein by this reference).
4.6
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) and incorporated herein by this reference).
4.7
Form of Notice of Stock Option Award under the 2007 Stock
Incentive Plan (filed as Exhibit 4.5 to the Registrant's
Registration Statement on Form S-1, as amended (File No.
333-138199) and incorporated herein by this reference).
4.8
Form of Notice of Restricted Stock Purchase Award under the 2007
Stock Incentive Plan (filed as Exhibit 4.6 to the Registrant's
Registration Statement on Form S-1, as amended (File No.
333-138199) and incorporated herein by this reference).
4.9
Form of Notice of Restricted Stock Purchase Award for Non-Employee
Directors under the 2007 Stock Incentive Plan (filed as Exhibit
4.7 to the Registrant's Registration Statement on Form S-1, as
amended (File No. 333-138199) and incorporated herein by this
reference).
4.10
Sourcefire, Inc. 2007 Employee Stock Purchase Plan (filed as
Exhibit 10.1 to the Registrant's Current Report on Form 8-K, filed
with the Commission on October 4, 2007, and incorporated herein by
this reference)
5.1
Opinion of Morrison & Foerster LLP (filed herewith)
23.1
Consent of Morrison & 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)