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[Form 4] FORMFACTOR INC Insider Trading Activity

Filing Impact
(High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

FormFactor (FORM) CEO and Director Mike Slessor reported routine equity vesting activity on 11/07/2025. He acquired 5,908 shares of common stock upon settlement of restricted stock units and had 3,282 shares withheld to cover taxes at $52.25 per share. Following these transactions, he directly owned 541,673 shares.

The RSUs convert 1‑for‑1 into common stock and were part of a grant vesting in quarterly installments through August 2026, subject to continued service and plan terms.

Positive

  • None.

Negative

  • None.

Insights

Routine RSU vesting with tax withholding; neutral impact.

FormFactor disclosed standard insider activity: 5,908 shares issued from RSU settlement on 11/07/2025, with 3,282 shares withheld for taxes at $52.25 per share. The transaction reflects equity compensation mechanics rather than an open-market trade.

The RSUs vest quarterly through August 2026 on a 1‑for‑1 basis, contingent on service, with unvested units forfeitable under typical conditions. Post‑transaction direct ownership is 541,673 shares. Given its administrative nature, this filing is not thesis‑changing.

Insider SLESSOR MIKE
Role CEO
Type Security Shares Price Value
Exercise Restricted Stock Units 5,908 $0.00 --
Exercise Common Stock 5,908 $0.00 --
Tax Withholding Common Stock 3,282 $52.25 $171K
Holdings After Transaction: Restricted Stock Units — 17,724 shares (Direct); Common Stock — 544,955 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. The Restricted Stock Units granted on August 7, 2023 vest in twelve (12) quarterly installments beginning on November 7, 2023 and ending on August 7, 2026 and will be settled into shares of common stocks 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.
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
Estimated average burden
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*
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)
11/07/2025
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 11/07/2025 M 5,908 A $0(1) 544,955 D
Common Stock 11/07/2025 F 3,282(2) D $52.25 541,673 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 11/07/2025 M 5,908 (3) (4) Common Stock 5,908 $0 17,724 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 7, 2023 vest in twelve (12) quarterly installments beginning on November 7, 2023 and ending on August 7, 2026 and will be settled into shares of common stocks 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.
Remarks:
/s/ Stan Finkelstein, Attorney-in-fact for Mike Slessor 11/10/2025
** 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.
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.

Source: View Original Filing on SEC EDGAR