Mike Slessor - 01 Aug 2025 Form 4 Insider Report for FORMFACTOR INC (FORM)

Reporting relationship: CEO, Director
Issuer ticker: FORM
Reported as of: 01 Aug 2025
Net transaction value: -$1,034,334
SEC form: 4
Accepted by SEC: 04 Aug 2025, 17:52:45 UTC
Prior SEC filing: 02 Jul 2025
Next SEC filing: 06 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Stan Finkelstein, Attorney-in-fact for Mike Slessor

Key filing fact

Mike Slessor filed Form 4 for FORMFACTOR INC (FORM) on 04 Aug 2025.

Key facts

This page summarizes Mike Slessor's Form 4 filing for FORMFACTOR INC (FORM).
7 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 04 Aug 2025, 17:52.

Change

Previous filing in this sequence was filed on 02 Jul 2025.
Current net transaction value: -$1,034,334.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001590177 Primary reporting owner

SLESSOR MIKE

Relationship: CEO, Director
Address: 7005 SOUTHFRONT ROAD, LIVERMORE
Signature: /s/ Stan Finkelstein, Attorney-in-fact for Mike Slessor
Signature date: 04 Aug 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FORM transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +49,935
Change %: +9.9%
Price: $0.000000
Shares after: 556,830
Date: 01 Aug 2025
Ownership: Direct
Footnotes: F1

FORM transaction

Common Stock

Tax liability

Transaction value: $802,489
Shares: -27,739
Change %: -5%
Price: $28.93
Shares after: 529,091
Date: 01 Aug 2025
Ownership: Direct
Footnotes: F2

FORM transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +14,426
Change %: +2.7%
Price: $0.000000
Shares after: 543,517
Date: 01 Aug 2025
Ownership: Direct
Footnotes: F3

FORM transaction

Common Stock

Tax liability

Transaction value: $231,845
Shares: -8,014
Change %: -1.5%
Price: $28.93
Shares after: 535,503
Date: 01 Aug 2025
Ownership: Direct
Footnotes: F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FORM transaction Derivative

Performance-based Restricted Stock Units

Award

Transaction value: $0
Shares: +49,935
Change %
Price: $0.000000
Shares after: 49,935
Date: 01 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 49,935
Exercise price: $0.000000
Footnotes: F1

FORM transaction Derivative

Performance-based Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -49,935
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 01 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 49,935
Exercise price: $0.000000
Footnotes: F1

FORM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -14,426
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 01 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 14,426
Exercise price: $0.000000
Footnotes: F3, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

These performance-based restricted stock units were previously granted and became vested based on the achievement of certain performance criteria in the period 7/1/2022 - 6/30/2025. The Compensation Committee has determined that such performance criteria have been met.

Footnote F2

Represents the number of shares withheld upon vesting and settlement of the PRSUs to cover tax withholding obligations.

Footnote F3

The Restricted Stock Units represent the third and final annual installment vest of a three year grant, grant date 8/01/2022.

Footnote F4

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

Footnote 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.