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FORMFACTOR INC
Semiconductors & Related Devices · DE · CIK 1039399
FormFactor provides semiconductor test and measurement technologies for the entire product lifecycle
red 8-K · 90d
$10.85B
Market cap
$144.17
Last close
+10.3%
1D
-8.0%
5D
2.2M
Volume
Price · last 39 sessions+7.3%
May 4L $115.07 · H $156.66Jun 29
254
Total filings
May 19, 2026
Last filing
12/26
Fiscal year end
8-KExecutive Change · Bylaw AmendmentMay 19, 202610-Q10-QMay 5, 20268-KResults of OperationsApr 29, 2026DEFA14ADEFA14AApr 2, 2026DEF 14ADEF 14AApr 2, 202610-K10-KFeb 20, 20268-KExecutive Change · Reg FD DisclosureFeb 18, 20268-KResults of OperationsFeb 4, 20268-KMaterial Impairment · Exit / Disposal CostsJan 9, 202610-Q10-QNov 4, 20258-KResults of OperationsOct 29, 20258-KExecutive Change · Reg FD DisclosureAug 12, 202510-Q10-QAug 5, 20258-KMaterial Agreement · Results of OperationsJul 30, 20258-KExecutive Change · Shareholder VoteMay 21, 202510-Q10-QMay 6, 20258-KResults of OperationsApr 30, 2025DEFA14ADEFA14AApr 2, 2025DEF 14ADEF 14AApr 2, 202510-K10-KFeb 21, 20258-KResults of OperationsFeb 5, 202510-Q10-QNov 5, 20248-KResults of OperationsOct 30, 202410-Q10-QAug 7, 20248-KResults of OperationsJul 31, 20248-KShareholder VoteMay 23, 202410-Q10-QMay 7, 20248-KResults of OperationsMay 1, 2024DEFA14ADEFA14AApr 1, 2024DEF 14ADEF 14AApr 1, 20248-KExecutive Change · Company UpdateMar 21, 202410-K10-KFeb 23, 20248-KResults of OperationsFeb 7, 202410-Q10-QNov 7, 20238-KResults of OperationsNov 1, 20238-KCompany UpdateNov 1, 20238-KMaterial Agreement · Company UpdateSep 18, 202310-Q10-QAug 8, 20238-KResults of OperationsAug 2, 20238-KShareholder VoteMay 24, 202310-Q10-QMay 9, 20238-KResults of OperationsMay 3, 2023DEFA14ADEFA14AApr 4, 2023DEF 14ADEF 14AApr 4, 202310-K10-KFeb 24, 20238-KExecutive Change · Results of OperationsFeb 8, 202310-Q10-QNov 1, 20228-KResults of Operations · Exit / Disposal CostsOct 26, 20228-KExecutive Change · Company UpdateSep 28, 202210-Q10-QAug 2, 20228-KResults of OperationsJul 27, 20228-KExecutive ChangeJul 26, 20228-KBylaw Amendment · Shareholder VoteJun 3, 20228-KCompany UpdateMay 24, 202210-Q10-QMay 3, 20228-KResults of OperationsApr 27, 2022DEFA14AFORM DEFA14AApr 13, 2022DEF 14ADEF 14AApr 13, 202210-K10-KFeb 18, 20228-KResults of OperationsFeb 2, 202210-Q10-QNov 2, 20218-KResults of OperationsOct 27, 20218-KExit / Disposal CostsSep 29, 202110-Q10-QJul 30, 20218-KResults of OperationsJul 28, 20218-KExecutive Change · Company UpdateJun 9, 20218-KShareholder VoteMay 18, 202110-Q10-QMay 4, 20218-KResults of OperationsApr 28, 2021DEFA14ADEFA14AMar 31, 2021DEF 14ADEF 14AMar 31, 202110-K10-KFeb 22, 20218-KResults of OperationsFeb 3, 202110-Q10-QNov 3, 20208-KResults of OperationsOct 28, 20208-KReg FD DisclosureAug 18, 202010-Q10-QAug 4, 20208-KResults of OperationsJul 30, 20208-KReg FD DisclosureJul 9, 20208-KReg FD DisclosureJul 1, 2020
Insider Activity
In the 90 days to Mar 18, 2026: 9 sold $8.8M.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 18, 2026 | Slessor MikeCEO | Sell | 5,495 | $95.21 | $523K |
| Mar 18, 2026 | Slessor MikeCEO | Sell | 2,832 | $95.73 | $271K |
| Mar 18, 2026 | Slessor MikeCEO | Sell | 1,900 | $94.10 | $179K |
| Mar 5, 2026 | Mckinnis Aric BrendanCFO, SVP Global Finance | Sell | 3,462 | $90.42 | $313K |
| Feb 24, 2026 | White Brian CDirector | Sell | 2,300 | $100.01 | $230K |
| Feb 18, 2026 | Slessor MikeCEO | Sell | 4,934 | $93.97 | $464K |
| Feb 18, 2026 | Slessor MikeCEO | Sell | 2,896 | $94.79 | $275K |
| Feb 18, 2026 | Slessor MikeCEO | Sell | 834 | $92.85 | $77K |
| Feb 11, 2026 | Brewer Kevin JDirector | Sell | 3,000 | $96.20 | $289K |
| Feb 10, 2026 | Rhodes SheriDirector | Sell | 7,634 | $92.61 | $707K |
| Feb 10, 2026 | St Dennis ThomasDirector | Sell | 5,601 | $93.71 | $525K |
| Feb 10, 2026 | Steven-Waiss KelleyDirector | Sell | 2,200 | $93.70 | $206K |
| Feb 10, 2026 | St Dennis ThomasDirector | Sell | 1,830 | $94.24 | $172K |
| Feb 9, 2026 | White Brian CDirector | Sell | 5,500 | $90.95 | $500K |
| Feb 9, 2026 | Obregon-Jimenez RebecaDirector | Sell | 2,770 | $95.82 | $265K |
| Feb 9, 2026 | Titinger JorgeDirector | Sell | 2,000 | $88.84 | $178K |
| Jan 15, 2026 | Slessor MikeCEO | Sell | 6,976 | $76.43 | $533K |
| Jan 15, 2026 | Slessor MikeCEO | Sell | 6,112 | $77.24 | $472K |
| Jan 6, 2026 | Slessor MikeCEO | Sell | 39,606 | $65.00 | $2.6M |
| Dec 17, 2025 | Slessor MikeCEO | Sell | 5,606 | $56.19 | $315K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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