Edgar Filing: SOURCEFIRE INC

Ownership Submission

FORM 4

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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3235-0287

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

SIERRA VENTURES VIII A, LP

2. Issuer Name and Ticker or Trading Symbol
SOURCEFIRE INC [FIRE]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	__X__ 10% Owner
_____ Officer (give title below)	_____ Other (specify below)

(Last)

(First)

(Middle)

2884 SAND HILL ROAD, SUITE 100

3. Date of Earliest Transaction (Month/Day/Year)
09/05/2007

(Street)

MENLO PARK, CA 94025

4. If Amendment, Date Original Filed(Month/Day/Year)

6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/05/2007		J⁽¹⁾		2,874,450	D	$ 0	1,665,149	I	See footnote(s) ⁽²⁾ ⁽³⁾

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security
(Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code
(Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date
(Month/Day/Year)

7. Title and Amount of Underlying Securities
(Instr. 3 and 4)

8. Price of Derivative Security
(Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)

11. Nature of Indirect Beneficial Ownership
(Instr. 4)

Code

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
SIERRA VENTURES VIII A, LP 2884 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025		X
SIERRA VENTURES VII LP/CA 2884 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025				See footnote(s) (2)(3)
SIERRA VENTURES ASSOCIATES VIII, LLC 2884 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025				See footnote(s) (2)(3)
SIERRA VENTURES ASSOCIATES VII, LLC 2884 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025				See footnote(s) (2)(3)
SIERRA VENTURES VIII B, LP 2884 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025				See footnote(s) (2)(3)

Signatures

/s/ Tim Guleri, as Managing Director of Sierra Ventures Associates VIII, LLC, as General Partner for Sierra Ventures VIII-A, L.P.		09/06/2007
^**Signature of Reporting Person		Date
/s/ Dave Schwab, as Managing Director of Sierra Ventures Associates VII, LLC, as General Partner for Sierra Ventures VII, L.P.		09/06/2007
^**Signature of Reporting Person		Date
/s/ Tim Guleri, as Managing Director of Sierra Ventures Associates VIII, LLC		09/06/2007
^**Signature of Reporting Person		Date
/s/ Dave Schwab, as Managing Director of Sierra Ventures Associates VII, LLC		09/06/2007
^**Signature of Reporting Person		Date
/s/ Tim Guleri, as Managing Director of Sierra Ventures Associates VIII, LLC, as General Partner for Sierra Ventures VIII-B, L.P.		09/06/2007
^**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Pro rata distribution from Sierra Ventures VII, L.P. ("Sierra VII"), Sierra Ventures VIII-A, L.P. ("Sierra VIII-A") and Sierra Ventures VIII-B, L.P. ("Sierra VIII-B") to their respective partners.
(2)	Includes 552,936 shares held by Sierra VII, 1,101,495 shares held by Sierra VIII-A and 10,718 shares held by Sierra VIII-B. Sierra Ventures Associates VII, LLC ("SVA VII") is the general partner of Sierra VII and possesses voting and dispositive power over the shares held by Sierra VII. SVA VII disclaims beneficial ownership of such shares except to the extent of its pecuniary interest therein. SVA VII also holds an additional 20,704 shares as nominee for its members. (continued onto Footnote 3)
(3)	(Continued from Footnote 2)...SVA VII does not have voting or dispositive power over such shares and disclaims beneficial ownership of such shares. Sierra Ventures Associates VIII, LLC ("SVA VIII") is the general partner of Sierra VIII-A and Sierra VIII-B and possesses voting and dispositive power over the shares held by Sierra VIII-A and Sierra VIII-B. SVA VIII disclaims beneficial ownership of such shares except to the extent of its pecuniary interest therein. SVA VIII also holds an additional 35,069 shares as nominee for its members. SVA VIII does not have voting or dispositive power over such shares and disclaims beneficial ownership of such shares.

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