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FormFactor (NASDAQ: FORM) CFO nets shares from RSU vesting and tax withholding

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

FormFactor Inc. CFO Aric Brendan McKinnis reported routine equity compensation activity involving restricted stock units. On May 5 and 6, 2026, restricted stock units converted into a total of 1,620 shares of common stock, reflecting scheduled vesting of prior RSU grants.

To cover tax withholding obligations on these vestings, 404 shares of common stock were withheld by the issuer, rather than sold in the open market. After these transactions, McKinnis directly held 12,356 shares of common stock. The RSUs vest in twelve quarterly installments and are forfeitable if employment ends before the applicable vesting dates, subject to existing severance and equity agreements.

Positive

  • None.

Negative

  • None.
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 274 $149.12 $41K
Exercise Restricted Stock Units 521 $0.00 --
Exercise Common Stock 521 $0.00 --
Tax Withholding Common Stock 130 $145.00 $19K
Holdings After Transaction: Restricted Stock Units — 10,990 shares (Direct, null); Common Stock — 12,630 shares (Direct, null)
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 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, 2026 and ending on November 6, 2028 and will be settled into shares of common stock on or following the vesting dates.
RSU shares converted 1,620 shares Total common shares from RSU conversions on May 5–6, 2026
Shares withheld for taxes 404 shares Tax-withholding dispositions of common stock on RSU vesting
Shares withheld price 1 $145.00 per share Tax-withholding disposition price for 130 shares of common stock on May 5, 2026
Shares withheld price 2 $149.12 per share Tax-withholding disposition price for 274 shares of common stock on May 6, 2026
Post-transaction holdings 12,356 shares Common stock directly held after May 6, 2026 transactions
RSU grant vesting schedule 1 12 quarterly installments RSUs granted August 5, 2024 vest from November 5, 2024 to August 5, 2027
RSU grant vesting schedule 2 12 quarterly installments RSUs granted November 6, 2025 vest from February 6, 2026 to November 6, 2028
Restricted Stock Units financial
"These shares of common stock reflect the settlement of restricted stock units of the Issuer."
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax withholding obligations financial
"Represents the number of shares withheld upon vesting of restricted stock units to cover tax withholding obligations."
vesting dates financial
"will be settled into shares of common stock on or following the vesting dates."
change of control severance agreement financial
"except as provided in the change of control severance agreement and any other agreements regarding equity vesting"
forfeited without consideration financial
"all restricted stock units that have not yet vested shall be forfeited without consideration"
SEC Form 4
FORM 4UNITED 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*
McKinnis Aric Brendan

(Last)(First)(Middle)
7005 SOUTHFRONT ROAD

(Street)
LIVERMORE CALIFORNIA 94551

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
FORMFACTOR INC [ FORM ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
CFO, SVP Global Finance
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/05/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common Stock05/05/2026M521A$0(1)11,661D
Common Stock05/05/2026F130(2)D$14511,531D
Common Stock05/06/2026M1,099A$0(1)12,630D
Common Stock05/06/2026F274(2)D$149.1212,356D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units$005/05/2026M521 (3) (4)Common Stock521$02,605D
Restricted Stock Units$005/06/2026M1,099 (5) (4)Common Stock1,099$010,990D
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 November 6, 2025 vest in twelve (12) quarterly installments beginning on February 6, 2026 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 McKinnis05/07/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)

FAQ

What did FORM CFO Aric McKinnis report in this Form 4?

McKinnis reported routine equity compensation activity. Restricted stock units vested and converted into common shares, and a portion of those shares was withheld to cover tax obligations, with the remaining shares added to his direct holdings.

How many FormFactor (FORM) shares came from RSU vesting?

A total of 1,620 shares of FormFactor common stock resulted from RSU vesting and settlement. These shares reflect previously granted restricted stock units converting into common stock on scheduled vesting dates under McKinnis’s compensation arrangements.

How many FORM shares were withheld for taxes in this filing?

The filing shows 404 shares of FormFactor common stock withheld to satisfy tax withholding obligations on the RSU vesting. These F-code entries represent shares retained by the issuer for taxes, not open-market sales by McKinnis.

Did the FORM CFO make any open-market purchases or sales?

No open-market purchases or sales are reported. The transactions are RSU conversions (M code) and tax-withholding dispositions (F code), meaning the activity is compensation-related rather than discretionary buying or selling in the market.

What are McKinnis’s FormFactor share holdings after these transactions?

After the reported transactions, McKinnis directly held 12,356 shares of FormFactor common stock. This balance reflects RSU conversions that increased his holdings, offset by shares withheld to cover tax obligations associated with the vesting.

How do the FormFactor RSUs for the CFO vest over time?

The RSUs vest in twelve quarterly installments under the disclosed grants, with settlement into common shares on or after each vesting date. Unvested RSUs are generally forfeited if employment ends before the applicable vesting date, subject to existing severance and equity agreements.