FormFactor (FORM) CEO Mike Slessor details RSU vesting and tax share withholdings

Rhea-AI Filing Summary

FormFactor Inc. CEO Mike Slessor reported routine equity compensation activity over two days in early February 2026. On February 5, 2026, 3,644 restricted stock units (RSUs) converted into the same number of common shares at an exercise price of $0, with 2,095 of those shares withheld to cover tax obligations at $83.87 per share. On February 6, 2026, another 6,031 RSUs similarly converted to common stock for $0, with 3,357 shares withheld for taxes at $90.29 per share. Following these transactions, Slessor directly held 477,130 shares of common stock and continued to hold RSUs that vest quarterly through August 2027 and August 2028, subject to continued employment.

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).

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^*

SLESSOR MIKE

(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)

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

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		3,644	A	$0(1)	476,551	D
Common Stock	02/05/2026		F		2,095(2)	D	$83.87	474,456	D
Common Stock	02/06/2026		M		6,031	A	$0(1)	480,487	D
Common Stock	02/06/2026		F		3,357(2)	D	$90.29	477,130	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			3,644	(3)	(4)	Common Stock	3,644	$0	21,864	D
Restricted Stock Units	$0	02/06/2026		M			6,031	(5)	(4)	Common Stock	6,031	$0	60,310	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. 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.

4. 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.

5. The Restricted Stock Units granted on August 6, 2025 vest in twelve (12) quarterly installments beginning on November 6, 2025 and ending on August 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 Mike Slessor	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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FAQ

What insider transactions did FORM CEO Mike Slessor report in this Form 4?

Mike Slessor reported RSU vesting and related tax share withholdings. On February 5 and 6, 2026, restricted stock units converted into common shares at $0, with a portion of the new shares withheld to satisfy tax obligations, reflecting routine equity compensation activity.

How many FormFactor (FORM) shares did the CEO acquire and have withheld for taxes?

The CEO had 3,644 RSUs settle into common shares on February 5 and 6,031 on February 6. Of these, 2,095 shares at $83.87 and 3,357 shares at $90.29 were withheld to cover tax obligations, as disclosed in the Form 4 footnotes.

How many FormFactor (FORM) shares does the CEO own after these transactions?

After the reported transactions, Mike Slessor directly owned 477,130 shares of FormFactor common stock. This figure reflects the RSU settlements on February 5 and 6, 2026, net of the shares withheld to cover associated tax withholding obligations.

What are the vesting terms of the CEO’s August 5, 2024 RSU grant at FormFactor (FORM)?

The August 5, 2024 RSU grant vests in twelve quarterly installments from November 5, 2024 through August 5, 2027. Vested units are settled into common shares on or after each vesting date, subject to the CEO’s continued employment with FormFactor.

What are the vesting terms of the CEO’s August 6, 2025 RSU grant at FormFactor (FORM)?

The August 6, 2025 RSU grant vests in twelve quarterly installments from November 6, 2025 through August 6, 2028. Each vested restricted stock unit converts into one share of FormFactor common stock on or following the respective vesting date.

What happens to the CEO’s unvested RSUs at FormFactor if employment ends?

If the CEO’s employment ends before a vesting date, all unvested RSUs are forfeited without consideration. Exceptions may apply under a change of control severance agreement or other equity agreements that are on file with the SEC for FormFactor.