Mike Slessor
Mike Slessor: CEO · Director at FormFactor and Director at Benchmark Electronics. What Mike Slessor holds in 2 AI and semiconductor companies tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
FormFactor (FORM)
Mike Slessor holds 466,694 FormFactor shares (0.60% of the company), worth about $70.1M at the last price, according to the Form 4 of Sep 16, 2026.
- Shares held: 466,694 (0.60%), $70.1M — Held in their own name.
Benchmark Electronics (BHE)
Mike Slessor holds 4,349 Benchmark Electronics shares (0.01% of the company), worth about $377,797.63 at the last price, according to the Form 4 of May 27, 2026.
- Shares held: 4,349 (0.01%), $377,797.63 — Held in their own name.
Declarations
- FormFactor (FORM) — Form 4 of Sep 16, 2026 (CEO): open-market sale of 8,737 at $104.26; open-market sale of 7,773 at $105.12; 466,694 shares after 0001628280-26-062602
- FormFactor (FORM) — Form 4 of Aug 14, 2026 (CEO): open-market sale of 2,482 at $128.72; open-market sale of 2,892 at $129.55; 484,204 shares after 0001628280-26-057485
- FormFactor (FORM) — Form 4 of Aug 7, 2026 (CEO): option exercise or conversion of 141,792; shares withheld for tax of 78,908 at $117.39; 500,206 shares after 0001628280-26-055434
- FormFactor (FORM) — Form 4 of Aug 6, 2026 (CEO): option exercise or conversion of 3,644; shares withheld for tax of 2,028 at $114.44; 434,702 shares after 0001628280-26-054951
- FormFactor (FORM) — Form 4 of Jul 15, 2026 (CEO): open-market sale of 1,041 at $116.56; open-market sale of 1,650 at $117.39; 430,412 shares after 0001628280-26-048529
- FormFactor (FORM) — Form 4 of Jun 10, 2026 (CEO): open-market sale of 1,399 at $117.70; open-market sale of 767 at $119.00; 435,147 shares after 0001628280-26-042611
- Benchmark Electronics (BHE) — Form 4 of May 27, 2026: grant or award of 2,093; 4,349 shares after 0001193125-26-245774
- FormFactor (FORM) — Form 4 of May 13, 2026 (CEO): open-market sale of 700 at $122.84; open-market sale of 1,300 at $123.72; 447,037 shares after 0001628280-26-035233
- FormFactor (FORM) — Form 4 of May 7, 2026 (CEO): option exercise or conversion of 5,908; shares withheld for tax of 3,288 at $144.68; 456,475 shares after 0001628280-26-032980
- FormFactor (FORM) — Form 4 of May 6, 2026 (CEO): option exercise or conversion of 3,644; shares withheld for tax of 2,028 at $145.00; 453,855 shares after 0001628280-26-032447
- FormFactor (FORM) — Form 4 of Apr 15, 2026 (CEO): open-market sale of 1,826 at $125.24; open-market sale of 900 at $126.58; 449,565 shares after 0001628280-26-025268
- FormFactor (FORM) — Form 4 of Mar 18, 2026 (CEO): open-market sale of 1,900 at $94.10; open-market sale of 5,495 at $95.21; 460,859 shares after 0001628280-26-019545
- FormFactor (FORM) — Form 4 of Feb 18, 2026 (CEO): open-market sale of 834 at $92.85; open-market sale of 4,934 at $93.97; 471,086 shares after 0001628280-26-009346
- FormFactor (FORM) — Form 4 of Feb 9, 2026 (CEO): option exercise or conversion of 5,908; shares withheld for tax of 3,288 at $94.88; 479,750 shares after 0001628280-26-007400
- FormFactor (FORM) — Form 4 of Feb 6, 2026 (CEO): option exercise or conversion of 3,644; shares withheld for tax of 2,095 at $83.87; 477,130 shares after 0001628280-26-006542
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.