Form 4 for FORM FORMFACTOR INC
Accepted 2026-08-17 18:16:35 ET · period of report 2026-08-14 · accession 0001628280-26-057485 · 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 | 2026-08-17 18:16 | 2026-08-14 | FORM | SLESSOR MIKE | CEO, Dir | S - Sale | $130.95 | -16.0K | 484.2K | -3% | -$2.10M |
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 | 2026-08-14 | S | D | 2,482 | $128.72 | 497,724 | 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 $128.14 through $129.01. 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 | 2026-08-14 | S | D | 2,892 | $129.55 | 494,832 | 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 $129.29 through $129.80. 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 | 2026-08-14 | S | D | 3,282 | $130.54 | 491,550 | 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 $130.255 through $131.00. 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 | 2026-08-14 | S | D | 1,125 | $131.65 | 490,425 | 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 $131.30 through $131.75. 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 | 2026-08-14 | S | D | 5,535 | $132.50 | 484,890 | 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 $132.17 through $132.95. 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 | 2026-08-14 | S | D | 686 | $133.33 | 484,204 | 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 $133.255 through $133.53. 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. |