FORMFACTOR INC — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FORMFACTOR INC (FORM)
CIK: 0001039399
Period of Report: 2026-03-02

Reporting Person: McKinnis Aric Brendan (CFO, SVP Global Finance)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-03-02	Common Stock	M	773	—	Acquired	14795	Direct
2026-03-02	Common Stock	F	193	$99.70	Disposed	14602	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-03-02	Restricted Stock Units	$0	M	773	Disposed		Common Stock (773)	Direct

Footnotes

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.

F2: Represents the number of shares withheld upon vesting of restricted stock units to cover tax withholding obligations.

F3: The Restricted Stock Units granted on June 2, 2023 vest in twelve (12) quarterly installments beginning on September 2, 2023 and ending on June 2, 2026 and will be settled into shares of
common stock on or following the vesting dates.

F4: 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.