SLESSOR MIKE 4

4 · FORMFACTOR INC · Filed Feb 9, 2026

AI-generated summary of this filing

Updated Feb 9, 2026

FormFactor (FORM) CEO Mike Slessor Receives RSU Shares; Tax Withholding

What Happened

Mike Slessor, CEO and director of FormFactor (FORM), had restricted stock units (RSUs) convert into 9,675 shares on Feb 5–6, 2026. To satisfy tax withholding, 5,452 of those shares were withheld (disposed) for aggregate consideration of $478,812 (2,095 shares at $83.87 = $175,708; 3,357 shares at $90.29 = $303,104). Net shares added to his position after withholding: 4,223 shares.
These were RSU settlements (conversion of derivatives), not open-market sales. The zero-dollar “acquired/disposed” derivative lines reflect the RSU-to-share conversion.

Key Details

Transaction dates and prices: Feb 5, 2026 (3,644 RSUs converted; 2,095 shares withheld at $83.87); Feb 6, 2026 (6,031 RSUs converted; 3,357 shares withheld at $90.29).
Shares acquired via settlement: 9,675; shares withheld for taxes (treated as disposition): 5,452; net new shares retained: 4,223.
Total value of shares withheld for taxes: $478,812.
Footnotes: RSUs settle 1-for-1 into common stock. Withholding shares were used to cover tax obligations. The grants vest quarterly (Aug 5, 2024 grant vests Nov 5, 2024–Aug 5, 2027; Aug 6, 2025 grant vests Nov 6, 2025–Aug 6, 2028). Unvested RSUs are forfeited upon termination except as provided in certain agreements.
Filing: Form 4 was filed Feb 9, 2026 — within the typical 2-business-day reporting window for these Feb 5–6 transactions.

Context

This is a routine RSU vesting and tax-withholding event, not an open-market sale that signals active divestment. When RSUs vest, companies commonly withhold shares to satisfy tax liabilities (a net-share settlement), which reduces the number of shares the insider takes away from the vesting event.
For retail investors: such transactions document insider share changes but do not necessarily reflect a buy-or-sell signal about company prospects.

Form 4

Period: 2026-02-05

DirectorCEO

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-02-05+3,644→ 476,551 total
Tax Payment
Common Stock
[F2]
2026-02-05$83.87/sh−2,095$175,708→ 474,456 total
Exercise/Conversion
Common Stock
[F1]
2026-02-06+6,031→ 480,487 total
Tax Payment
Common Stock
[F2]
2026-02-06$90.29/sh−3,357$303,104→ 477,130 total
Exercise/Conversion
Restricted Stock Units
[F3][F4]
2026-02-05−3,644→ 21,864 total
Exercise: $0.00→ Common Stock (3,644 underlying)
Exercise/Conversion
Restricted Stock Units
[F5][F4]
2026-02-06−6,031→ 60,310 total
Exercise: $0.00→ Common Stock (6,031 underlying)

Footnotes (5)

[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 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.
[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.
[F5]The Restricted Stock Units granted on August 6, 2025 vest in twelve (12) quarterly installments beginning on November 6, 2025 and ending on August 6, 2028 and will be settled into shares of common stock on or following the vesting dates.

Signature

/s/ Stan Finkelstein, Attorney-in-fact for Mike Slessor|2026-02-09

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