SEC Form 4 · accession 0001628280-26-048529
FORMFACTOR INC · FORM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mike Slessor
Officer — CEO · Director
Period of report
Jul 15, 2026
Accepted (ET)
Jul 16, 2026 · 5:30 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 | Jul 15, 2026 | S | 1,041 | $116.56 | D | 434,106 | D | |
| Common StockF1,F3 | Jul 15, 2026 | S | 1,650 | $117.39 | D | 432,456 | D | |
| Common StockF1,F4 | Jul 15, 2026 | S | 706 | $118.21 | D | 431,750 | D | |
| Common StockF1,F5 | Jul 15, 2026 | S | 170 | $119.08 | D | 431,580 | D | |
| Common StockF1,F6 | Jul 15, 2026 | S | 300 | $120.58 | D | 431,280 | D | |
| Common StockF1,F7 | Jul 15, 2026 | S | 868 | $121.30 | D | 430,412 | 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 $115.995 through $116.985. 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 $116.995 through $117.9. 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.
- F4Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $117.985 through $118.8. 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.
- F5Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $119.075 through $119.085. 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.
- F6Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $120.215 through $120.76. 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.
- F7Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $121.14 through $121.38. 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.