[Form 4] FORMFACTOR INC Insider Trading Activity

Rhea-AI Filing Summary

FormFactor Inc.'s CFO, Aric McKinnis, reported routine equity compensation activity involving restricted stock units (RSUs) and related tax withholding. On February 5, 2026, 521 RSUs converted on a 1-for-1 basis into common shares, and 162 shares were withheld to cover tax obligations, leaving 13,259 common shares directly owned. On February 6, 2026, a further 1,099 RSUs converted into common shares, with 336 shares withheld for taxes, resulting in 14,022 common shares held directly after these transactions. Following the settlements, McKinnis also directly held 3,126 RSUs after the February 5 event and 12,089 RSUs after the February 6 event, all of which vest in quarterly installments and are forfeitable if employment ends before the applicable vesting dates.

Insider Trade Summary

1,620 shares exercised/converted

Mixed 6 txns

Insider McKinnis Aric Brendan

Role CFO, SVP Global Finance

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	1,099	$0.00	--
Exercise	Common Stock	1,099	$0.00	--
Tax Withholding	Common Stock	336	$90.29	$30K
Exercise	Restricted Stock Units	521	$0.00	--
Exercise	Common Stock	521	$0.00	--
Tax Withholding	Common Stock	162	$83.87	$14K

Holdings After Transaction: Restricted Stock Units — 12,089 shares (Direct); Common Stock — 14,358 shares (Direct)

Footnotes (1)

1. These shares of common stock reflect the settlement of restricted stock units of the Issuer. Each Restricted Stock Unit (RSU) is convertible into a share of common stock on a 1-for-1 basis. Represents the number of shares withheld upon vesting of restricted stock units to cover tax withholding obligations. Includes 626 shares acquired from the Issuer's Employee Stock Purchase Plan on January 30, 2026. The Restricted Stock Units granted on August 5, 2024 vest in twelve (12) quarterly installments beginning on November 5, 2024 and ending on August 5, 2027 and will be settled into shares of common stock on or following the vesting dates. If the reporting person's employment is terminated for any reason before an applicable Vesting Date, all restricted stock units that have not yet vested shall be forfeited without consideration, except as provided in the change of control severance agreement and any other agreements regarding equity vesting and exercisability between the reporting person and Issuer, which agreements or form agreements are filed with the SEC. The Restricted Stock Units granted on November 6, 2025 vest in twelve (12) quarterly installments beginning on February 6, 2025 and ending on November 6, 2028 and will be settled into shares of common stock on or following the vesting dates.

Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

McKinnis Aric Brendan

(Last) (First) (Middle)

7005 SOUTHFRONT ROAD

(Street)

LIVERMORE CA 94551

(City) (State) (Zip)

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)
	CFO, SVP Global Finance

3. Date of Earliest Transaction (Month/Day/Year)
02/05/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/05/2026		M		521	A	$0(1)	13,421	D
Common Stock	02/05/2026		F		162(2)	D	$83.87	13,259	D
Common Stock	02/06/2026		M		1,099	A	$0(1)	14,358	D
Common Stock	02/06/2026		F		336(2)	D	$90.29	14,022(3)	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	$0	02/05/2026		M			521	(4)	(5)	Common Stock	521	$0	3,126	D
Restricted Stock Units	$0	02/06/2026		M			1,099	(6)	(5)	Common Stock	1,099	$0	12,089	D

Explanation of Responses:

1. These shares of common stock reflect the settlement of restricted stock units of the Issuer. Each Restricted Stock Unit (RSU) is convertible into a share of common stock on a 1-for-1 basis.

2. Represents the number of shares withheld upon vesting of restricted stock units to cover tax withholding obligations.

3. Includes 626 shares acquired from the Issuer's Employee Stock Purchase Plan on January 30, 2026.

4. The Restricted Stock Units granted on August 5, 2024 vest in twelve (12) quarterly installments beginning on November 5, 2024 and ending on August 5, 2027 and will be settled into shares of common stock on or following the vesting dates.

5. If the reporting person's employment is terminated for any reason before an applicable Vesting Date, all restricted stock units that have not yet vested shall be forfeited without consideration, except as provided in the change of control severance agreement and any other agreements regarding equity vesting and exercisability between the reporting person and Issuer, which agreements or form agreements are filed with the SEC.

6. The Restricted Stock Units granted on November 6, 2025 vest in twelve (12) quarterly installments beginning on February 6, 2025 and ending on November 6, 2028 and will be settled into shares of common stock on or following the vesting dates.

Remarks:

	/s/ Stan Finkelstein, Attorney-in-fact for Aric McKinnis	02/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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