SEC FORM 4

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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

1. Name and Address of Reporting Person^*

GULERI TIM

(Last)

(First)

(Middle)

C/O SOURCEFIRE, INC.

9770 PATUXENT WOODS DRIVE

(Street)

COLUMBIA

21046

(City)

(State)

(Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2009

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

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/29/2009		S		3,850	D	$12.01⁽¹⁾	55,959	I	Held by trust⁽²⁾
Common Stock	05/29/2009		S		161,656⁽³⁾	D	$12.01⁽¹⁾	210,795	I	Held by limited partnerships⁽⁴⁾
Common Stock								11,444	D
Common Stock								9,838	I	Held by limited liability companies⁽⁵⁾

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 Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $11.43 to $12.20 per share. The Reporting Person undertakes to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

2. Shares are held by the Guleri Family Trust UTD dated April 7, 1999 (the "Guleri Trust"). The Reporting Person is a trustee and beneficiary of the Guleri Trust.

3. Includes 160,098 shares sold by Sierra Ventures VIII-A, L.P. ("Sierra VIII-A") and 1,558 shares held by Sierra Ventures VIII-B, L.P. ("Sierra VIII-B").

4. Includes 208,766 shares held by Sierra VIII-A and 2,029 shares held by Sierra VIII-B. Sierra Ventures Associates VIII, LLC ("SVA VIII") serves as 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. The Reporting Person is a managing member of SVA VIII and shares voting and dispositive power over the shares held by Sierra VIII-A and Sierra VIII-B. The Reporting Person disclaims beneficial ownership of the shares held by Sierra VIII-A and Sierra VIII-B, except to the extent of his proportionate pecuniary interest therein.

5. Consists of 3,496 shares held in the name of Sierra Ventures Associates VII, LLC, as nominee on behalf of the Guleri Trust, and 6,342 shares held in the name of SVA VIII, as nominee on behalf of the Guleri Trust.

	/s/ Tim Guleri	06/02/2009
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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