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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(Print or Type Responses)

1. Name and Address of Reporting Person * MATHEWS PETER B   2. Issuer Name and Ticker or Trading Symbol FORMFACTOR INC [FORM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Sr VP of Worldwide Sales (Last) (First) (Middle) 7005 SOUTHFRONT ROAD 3. Date of Earliest Transaction (Month/Day/Year) 02/06/2006 (Street) LIVERMORE, CA 94551 4. If Amendment, Date 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 (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 02/06/2006   M   12,083 A $ 19.5 14,716 D   Common Stock (1) 02/06/2006   S   12,083 D $ 36.3786 2,633 D   Common Stock 02/06/2006   M   2,519 A $ 5.5 5,152 D   Common Stock (1) 02/06/2006   S   2,519 D $ 35.65 2,633 D   Common Stock 02/06/2006   M   10,000 A $ 5.5 12,633 D   Common Stock (1) 02/06/2006   S   10,000 D $ 35.6575 2,633 D   Common Stock 02/06/2006   M   19,616 A $ 6.5 22,249 D   Common Stock (1) 02/06/2006   S   19,616 D $ 35.8413 2,633 D   Common Stock 02/06/2006   M   10,119 A $ 6.5 12,752 D   Common Stock (1) 02/06/2006   S   10,119 D $ 36.2219 2,633 D

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

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Non-Qualified Stock Option (right to buy)

$ 5.5

02/06/2006

M

2,519

09/21/2000(2)

09/21/2010

Common Stock

2,519

$ 0

10,000

D

Non-Qualified Stock Option (right to buy)

$ 5.5

02/06/2006

M

10,000

09/21/2000(2)

09/21/2010

Common Stock

10,000

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 6.5

02/06/2006

M

19,616

10/30/2001(2)

10/30/2011

Common Stock

19,616

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 6.5

02/06/2006

M

10,119

04/17/2002(3)

04/17/2012

Common Stock

10,119

$ 0

32,997

D

Non-Qualified Stock Option (right to buy)

$ 19.5

02/06/2006

M

12,083

08/14/2003(4)

08/14/2013

Common Stock

12,083

$ 0

33,279

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MATHEWS PETER B 7005 SOUTHFRONT ROAD LIVERMORE, CA 94551			Sr VP of Worldwide Sales

Signatures

By: Stuart L. Merkadeau, Attorney-in-Fact For: Peter B. Mathews		02/08/2006
**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)	Pursuant to Rule 10b5-1 Plan.
(2)	The option, which is immediately exercisable, is fully vested.
(3)	The option, which is immediately exercisable, vests over a one-year period in equal monthly installments, starting March 6, 2005.
(4)	Options vest and become exercisable as to 1/48th of the total number of shares each month starting on grant date.
Remarks: On January 31, 2006, Mr. Mathews acquired 847 shares from FormFactor through the 2002 Employee Stock Purchase Plan.  The amount of shares beneficially owned by Mr. Mathews in Column 5 includes the acquisition of such shares. THE CONFIRMING STATEMENT GRANTING THE ATTORNEY-IN-FACT THE AUTHORITY TO EXECUTE AND FILE THIS FORM 4 HAS BEEN PREVIOUSLY FILED WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION.

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