SEC Form 4 · accession 0001628280-26-055434
FORMFACTOR INC · FORM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mike Slessor
Officer — CEO · Director
Period of report
Aug 6, 2026
Accepted (ET)
Aug 10, 2026 · 6:58 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001039399
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Aug 7, 2026 | M | 141,792 | $0.00 | A | 576,494 | D | |
| Common StockF2 | Aug 7, 2026 | F | 78,908 | $117.39 | D | 497,586 | D | |
| Common StockF3 | Aug 7, 2026 | M | 5,908 | $0.00 | A | 503,494 | D | |
| Common StockF4 | Aug 7, 2026 | F | 3,288 | $117.39 | D | 500,206 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF5,F6 | $0.00 | Aug 6, 2026 | A | 27,696 | A | — | — | Common Stock | 27,696 | 27,696 | D |
| Performance-based Restricted Stock UnitsF1 | $0.00 | Aug 7, 2026 | A | 141,792 | A | — | — | Common Stock | 141,792 | 141,792 | D |
| Performance-based Restricted Stock UnitsF1 | $0.00 | Aug 7, 2026 | M | 141,792 | D | — | — | Common Stock | 141,792 | 0 | D |
| Restricted Stock UnitsF7,F6 | $0.00 | Aug 7, 2026 | M | 5,908 | D | — | — | Common Stock | 5,908 | 0 | D |
Explanation of responses
- F1These Performance-based Restricted Stock Units were previously granted and became vested based on the achievement of certain performance criteria in the period 7/1/2023 - 6/30/2026. The Compensation Committee has determined that such performance criteria have been met.
- F2Represents the number of shares withheld upon vesting and settlement of the Performance-based Restricted Stock Units to cover tax withholding obligations.
- F3These 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.
- F4Represents the number of shares withheld upon vesting of Restricted Stock Units to cover tax withholding obligations.
- F5The Restricted Stock Units granted on August 6, 2026 vest in twelve (12) quarterly installments beginning on November 6, 2026 and end on August 6, 2029 and will be settled into shares of common stocks on or following the vesting date.
- F6If 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.
- F7The Restricted Stock Units granted on August 7, 2023 vest in twelve (12) quarterly installments beginning on November 7, 2023 and ending on August 7, 2026 and will be settled into shares of common stock on or following the vesting dates.