SEC FORM 3

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Jackson E Wayne

(Last)

(First)

(Middle)

9770 PATUXENT WOODS DRIVE

(Street)

COLUMBIA

21046

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/08/2007

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

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	624,384	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Series A Convertible Preferred Stock	⁽¹⁾	⁽²⁾	Common Stock	132,130	⁽¹⁾	I	Held by grantor retained annuity trust⁽³⁾
Employee Stock Option (right to buy)	06/24/2006⁽⁴⁾	06/24/2015	Common Stock	98,522	$2.03	D

Explanation of Responses:

1. 71,529 shares of Series A Convertible Preferred Stock, convertible to Common Stock on approximately a 1 to 1.8472 basis at anytime.

2. n/a.

3. Shares held by The E. Wayne Jackson III "Sourcefire, Inc." GRAT. Mr. Jackson has voting and investment control with respect to the shares held by the GRAT.

4. Options vest 25% on June 24, 2006 and in equal monthly installments of 2.083% over the subsequent three years. Options also accelerate and become fully vested if there is a change in control and the holder?s employment is terminated without cause within one year after the change in control subsequent to the change in control.

Remarks:

	/s/ Joseph M. Boyle as Attorney-in-Fact	03/08/2007
	** 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 5 (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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.