FormFactor, Inc. (FORM) — insider trading
Information Technology · NASDAQ
FormFactor, Inc. (FORM) has 96 reported SEC Form 4 insider transactions in our data, including 50 open-market sales among the most recent 96 (latest 2026-10-14).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,200 | $125.92 | $151.1K | Form 4 |
| 2026-10-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 7,703 | $125.36 | $965.6K | Form 4 |
| 2026-10-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 2,195 | $124.23 | $272.7K | Form 4 |
| 2026-09-16 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,000 | $105.80 | $105.8K | Form 4 |
| 2026-09-16 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 7,773 | $105.12 | $817.1K | Form 4 |
| 2026-09-16 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 8,737 | $104.26 | $910.9K | Form 4 |
| 2026-09-03 | STEVEN-WAISS KELLEY | Director | Open-market sale | 2,100 | $96.10 | $201.8K | Form 4 |
| 2026-08-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 686 | $133.33 | $91.5K | Form 4 |
| 2026-08-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 5,535 | $132.50 | $733.4K | Form 4 |
| 2026-08-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,125 | $131.65 | $148.1K | Form 4 |
| 2026-08-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 3,282 | $130.54 | $428.4K | Form 4 |
| 2026-08-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 2,892 | $129.55 | $374.7K | Form 4 |
| 2026-08-14 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 2,482 | $128.72 | $319.5K | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 5,908 | — | $0 | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 141,792 | — | $0 | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Grant / award / vesting (derivative) | 141,792 | — | $0 | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 3,288 | $117.39 | $386.0K | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 5,908 | — | $0 | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 78,908 | $117.39 | $9.26M | Form 4 |
| 2026-08-07 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 141,792 | — | $0 | Form 4 |
| 2026-08-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Grant / award / vesting (derivative) | 6,924 | — | $0 | Form 4 |
| 2026-08-06 | SLESSOR MIKE | Director, Officer (CEO) | Grant / award / vesting (derivative) | 27,696 | — | $0 | Form 4 |
| 2026-08-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion (derivative) | 1,099 | — | $0 | Form 4 |
| 2026-08-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Shares withheld for taxes / exercise cost | 274 | $115.21 | $31.6K | Form 4 |
| 2026-08-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion | 1,099 | — | $0 | Form 4 |
| 2026-08-06 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 6,031 | — | $0 | Form 4 |
| 2026-08-06 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 3,357 | $115.21 | $386.8K | Form 4 |
| 2026-08-06 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 6,031 | — | $0 | Form 4 |
| 2026-08-05 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion (derivative) | 521 | — | $0 | Form 4 |
| 2026-08-05 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Shares withheld for taxes / exercise cost | 130 | $114.44 | $14.9K | Form 4 |
| 2026-08-05 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion | 521 | — | $0 | Form 4 |
| 2026-08-05 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 3,644 | — | $0 | Form 4 |
| 2026-08-05 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 2,028 | $114.44 | $232.1K | Form 4 |
| 2026-08-05 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 3,644 | — | $0 | Form 4 |
| 2026-07-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 868 | $121.30 | $105.3K | Form 4 |
| 2026-07-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 300 | $120.58 | $36.2K | Form 4 |
| 2026-07-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 170 | $119.08 | $20.2K | Form 4 |
| 2026-07-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 706 | $118.21 | $83.5K | Form 4 |
| 2026-07-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,650 | $117.39 | $193.7K | Form 4 |
| 2026-07-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,041 | $116.56 | $121.3K | Form 4 |
| 2026-06-16 | St Dennis Thomas | Director | Bona fide gift | 740 | — | $0 | Form 4 |
| 2026-06-15 | St Dennis Thomas | Director | Open-market sale | 2,800 | $151.49 | $424.2K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,629 | $123.37 | $201.0K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 2,500 | $122.63 | $306.6K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 4,220 | $121.72 | $513.7K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 975 | $121.00 | $118.0K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 400 | $119.46 | $47.8K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 767 | $119.00 | $91.3K | Form 4 |
| 2026-06-10 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,399 | $117.70 | $164.7K | Form 4 |
| 2026-06-02 | Rhodes Sheri | Director | Open-market sale | 6,328 | $125.40 | $793.5K | Form 4 |
| 2026-06-02 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion (derivative) | 773 | — | $0 | Form 4 |
| 2026-06-02 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Shares withheld for taxes / exercise cost | 193 | $125.11 | $24.1K | Form 4 |
| 2026-06-02 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion | 773 | — | $0 | Form 4 |
| 2026-05-21 | Obregon-Jimenez Rebeca | Director | Open-market sale | 3,828 | $126.48 | $484.1K | Form 4 |
| 2026-05-20 | WHITE BRIAN C | Director | Open-market sale | 3,250 | $126.00 | $409.5K | Form 4 |
| 2026-05-19 | St Dennis Thomas | Director | Open-market sale | 1,000 | $115.84 | $115.8K | Form 4 |
| 2026-05-15 | WHITE BRIAN C | Director | Grant / award / vesting | 1,347 | — | $0 | Form 4 |
| 2026-05-15 | Titinger Jorge | Director | Grant / award / vesting | 1,347 | — | $0 | Form 4 |
| 2026-05-15 | STEVEN-WAISS KELLEY | Director | Grant / award / vesting | 1,347 | — | $0 | Form 4 |
| 2026-05-15 | Rhodes Sheri | Director | Grant / award / vesting | 1,347 | — | $0 | Form 4 |
| 2026-05-15 | Obregon-Jimenez Rebeca | Director | Grant / award / vesting | 1,347 | — | $0 | Form 4 |
| 2026-05-15 | St Dennis Thomas | Director | Grant / award / vesting | 1,347 | — | $0 | Form 4 |
| 2026-05-15 | STEVEN-WAISS KELLEY | Director | Open-market sale | 5,400 | $125.60 | $678.2K | Form 4 |
| 2026-05-13 | Titinger Jorge | Director | Open-market sale | 4,009 | $128.79 | $516.3K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 702 | $136.15 | $95.6K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 66 | $135.73 | $9.0K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 200 | $132.63 | $26.5K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 200 | $130.57 | $26.1K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 700 | $129.33 | $90.5K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 700 | $128.52 | $90.0K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 100 | $127.47 | $12.7K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 398 | $126.59 | $50.4K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,388 | $125.58 | $174.3K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 2,984 | $124.71 | $372.1K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,300 | $123.72 | $160.8K | Form 4 |
| 2026-05-13 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 700 | $122.84 | $86.0K | Form 4 |
| 2026-05-07 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 5,908 | — | $0 | Form 4 |
| 2026-05-07 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 3,288 | $144.68 | $475.7K | Form 4 |
| 2026-05-07 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 5,908 | — | $0 | Form 4 |
| 2026-05-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion (derivative) | 1,099 | — | $0 | Form 4 |
| 2026-05-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Shares withheld for taxes / exercise cost | 274 | $149.12 | $40.9K | Form 4 |
| 2026-05-06 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion | 1,099 | — | $0 | Form 4 |
| 2026-05-06 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 6,031 | — | $0 | Form 4 |
| 2026-05-06 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 3,357 | $149.12 | $500.6K | Form 4 |
| 2026-05-06 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 6,031 | — | $0 | Form 4 |
| 2026-05-05 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion (derivative) | 521 | — | $0 | Form 4 |
| 2026-05-05 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Shares withheld for taxes / exercise cost | 130 | $145.00 | $18.9K | Form 4 |
| 2026-05-05 | McKinnis Aric Brendan | Officer (CFO, SVP Global Finance) | Option exercise / conversion | 521 | — | $0 | Form 4 |
| 2026-05-05 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion (derivative) | 3,644 | — | $0 | Form 4 |
| 2026-05-05 | SLESSOR MIKE | Director, Officer (CEO) | Shares withheld for taxes / exercise cost | 2,028 | $145.00 | $294.1K | Form 4 |
| 2026-05-05 | SLESSOR MIKE | Director, Officer (CEO) | Option exercise / conversion | 3,644 | — | $0 | Form 4 |
| 2026-04-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 767 | $129.22 | $99.1K | Form 4 |
| 2026-04-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 5,432 | $128.56 | $698.3K | Form 4 |
| 2026-04-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 2,369 | $127.65 | $302.4K | Form 4 |
| 2026-04-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 900 | $126.58 | $113.9K | Form 4 |
| 2026-04-15 | SLESSOR MIKE | Director, Officer (CEO) | Open-market sale | 1,826 | $125.24 | $228.7K | Form 4 |
Ask the chat about FORM's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: FormFactor, Inc. (FORM).
Last updated 2026-10-14 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.