Form 4 for FORM FORMFACTOR INC
Accepted 2026-05-14 17:32:14 ET · period of report 2026-05-13 · accession 0001628280-26-035233 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MT | 2026-05-14 17:32 | 2026-05-13 | FORM | SLESSOR MIKE | CEO, Dir | S - Sale | $126.52 | -9,438 | 447.0K | -2% | -$1.19M |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-13 | S | D | 700 | $122.84 | 455,775 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F2) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $122.23 through $123.19. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 2 | Common | Common Stock | 2026-05-13 | S | D | 1,300 | $123.72 | 454,475 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F3) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $123.28 through $124.17. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 3 | Common | Common Stock | 2026-05-13 | S | D | 2,984 | $124.71 | 451,491 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F4) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $124.22 through $125.20. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 4 | Common | Common Stock | 2026-05-13 | S | D | 1,388 | $125.58 | 450,103 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F5) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $125.26 through $126.04. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 5 | Common | Common Stock | 2026-05-13 | S | D | 398 | $126.59 | 449,705 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F6) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $126.37 through $127.14. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 6 | Common | Common Stock | 2026-05-13 | S | D | 100 | $127.47 | 449,605 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. |
| 7 | Common | Common Stock | 2026-05-13 | S | D | 700 | $128.52 | 448,905 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F7) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $128.37 through $129.07. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 8 | Common | Common Stock | 2026-05-13 | S | D | 700 | $129.33 | 448,205 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. (F8) Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $129.22 through $129.42. Reporting person undertakes to provide, upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. |
| 9 | Common | Common Stock | 2026-05-13 | S | D | 200 | $130.57 | 448,005 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. |
| 10 | Common | Common Stock | 2026-05-13 | S | D | 200 | $132.63 | 447,805 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. |
| 11 | Common | Common Stock | 2026-05-13 | S | D | 66 | $135.73 | 447,739 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. |
| 12 | Common | Common Stock | 2026-05-13 | S | D | 702 | $136.15 | 447,037 | D | — | — | (F1) The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. |