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FormFactor CFO acquires shares as stock grants settle

Tax withholding was reported alongside the RSU settlements, including separate entries for 206, 433 and 228 shares.

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Form Type
4

Rhea-AI Filing Summary

FormFactor Inc. CFO, SVP Global Finance Aric Brendan McKinnis reported acquiring 521 common shares on November 5, 2026, following settlement of restricted stock units; the footnote says this includes 3 shares acquired through the Employee Stock Purchase Plan on July 31, 2026. On November 6, he reported acquiring 1,099 and 577 common shares from RSU settlements. Shares withheld to cover tax obligations were 206 at $71.76 per share on November 5 and 433 and 228 at $81.12 per share on November 6.

Insider McKinnis Aric Brendan
Role CFO, SVP Global Finance
Type Security Shares Price Value
Exercise Restricted Stock Units F6, F5 1,099 $0.00 $0.00
Exercise Restricted Stock Units F7, F5 577 $0.00 $0.00
Exercise Common Stock F1 1,099 $0.00 $0.00
Tax Withholding Common Stock F3 433 $81.12 $35K
Exercise Common Stock F1 577 $0.00 $0.00
Tax Withholding Common Stock F3 228 $81.12 $18K
Exercise Restricted Stock Units F4, F5 521 $0.00 $0.00
Exercise Common Stock F1, F2 521 $0.00 $0.00
Tax Withholding Common Stock F3 206 $71.76 $15K
Holdings After Transaction: Restricted Stock Units — 16,702 units (Direct); Common Stock — 15,485 shares (Direct)
Footnotes (7)
  1. F1. 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. F2. Includes 3 shares acquired from the Issuer's Employee Stock Purchase Plan on July 31, 2026
  3. F3. Represents the number of shares withheld upon vesting of restricted stock units to cover tax withholding obligations.
  4. F4. 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. F5. 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. F6. 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.
  7. F7. The Restricted Stock Units granted on August 6, 2026 vest in twelve (12) quarterly installments beginning on November 6, 2026 and ending on August 6, 2029 and will be settled into shares of common stock on or following the vesting dates.
Common shares acquired 521 shares November 5, 2026; following RSU settlement. Includes 3 shares acquired through the Employee Stock Purchase Plan on July 31, 2026.
Shares withheld for tax obligations 206 shares Upon RSU vesting on November 5, 2026.
Reported price per share $71.76 per share For the 206 shares withheld upon vesting on November 5, 2026.
Common shares acquired 1,099 shares November 6, 2026; following settlement of restricted stock units.
Common shares acquired 577 shares November 6, 2026; following settlement of restricted stock units.
Shares withheld for tax obligations 433 shares Upon RSU vesting on November 6, 2026.
Shares withheld for tax obligations 228 shares Upon RSU vesting on November 6, 2026.
Reported price per share $81.12 per share For the 433 and 228 shares withheld upon vesting on November 6, 2026.
Restricted Stock Units financial
"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.
Employee Stock Purchase Plan financial
"acquired from the Issuer's Employee Stock Purchase Plan"
An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.
quarterly installments financial
"vest in twelve (12) quarterly installments"
tax withholding obligations financial
"to cover tax withholding obligations"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What shares did FormFactor CFO Aric Brendan McKinnis acquire?

He reported acquiring 521 common shares on November 5, 2026, and 1,099 and 577 common shares on November 6, 2026, following settlement of restricted stock units. The 521-share entry includes 3 shares acquired through the Employee Stock Purchase Plan on July 31, 2026.

How many shares were withheld for taxes in FormFactor's Form 4?

The report lists 206 shares withheld upon RSU vesting for tax obligations on November 5, 2026, at a reported $71.76 per share, and 433 and 228 shares withheld on November 6, 2026, at a reported $81.12 per share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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)
11/05/2026
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 Stock11/05/2026M521A$0(1)14,676(2)D
Common Stock11/05/2026F206(3)D$71.7614,470D
Common Stock11/06/2026M1,099A$0(1)15,569D
Common Stock11/06/2026F433(3)D$81.1215,136D
Common Stock11/06/2026M577A$0(1)15,713D
Common Stock11/06/2026F228(3)D$81.1215,485D
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$011/05/2026M521 (4) (5)Common Stock521$01,563D
Restricted Stock Units$011/06/2026M1,099 (6) (5)Common Stock1,099$08,792D
Restricted Stock Units$011/06/2026M577 (7) (5)Common Stock577$06,347D
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. Includes 3 shares acquired from the Issuer's Employee Stock Purchase Plan on July 31, 2026
3. Represents the number of shares withheld upon vesting of restricted stock units to cover tax withholding obligations.
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, 2026 and ending on November 6, 2028 and will be settled into shares of common stock on or following the vesting dates.
7. The Restricted Stock Units granted on August 6, 2026 vest in twelve (12) quarterly installments beginning on November 6, 2026 and ending on August 6, 2029 and will be settled into shares of common stock on or following the vesting dates.
Remarks:
/s/ Stan Finkelstein, Attorney-in-fact for Aric McKinnis11/09/2026
** 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)

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