SEC Form 4 · accession 0001628280-26-062602
FORMFACTOR INC · FORM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mike Slessor
Officer — CEO · Director
Period of report
Sep 16, 2026
Accepted (ET)
Sep 17, 2026 · 7:30 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001039399
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1,F2 | Sep 16, 2026 | S | 8,737 | $104.26 | D | 475,467 | D | |
| Common StockF1,F3 | Sep 16, 2026 | S | 7,773 | $105.12 | D | 467,694 | D | |
| Common StockF1 | Sep 16, 2026 | S | 1,000 | $105.80 | D | 466,694 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025.
- F2Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $103.65 through $104.63. 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.
- F3Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $104.66 through $105.615. 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.