Dudediligence.

FormFactor, Inc

FORMNASDAQ · Semiconductors & Related Devices
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$24.4M

35 notices · 260,470 sh

Oct 2025 to Oct 2026

Reported ·

$17.4M

56 sales · 0 buys

Oct 2025 to Jun 2026

The two figures cover different periods.

37 of 56 reported sales carry the 10b5-1 box. Together they are 0.24% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-09-16: MIKE SLESSOR, Form 1442026-09-03: KELLEY LYNNE STEVEN-WAISS, Form 1442026-08-14: MIKE SLESSOR, Form 1442026-07-15: MIKE SLESSOR, Form 1442026-06-15: THOMAS M. ST. DENNIS, Form 1442026-06-10: MIKE SLESSOR, Form 1442026-06-04: KEVIN J BREWER, Form 1442026-06-02: SHERI LYNN RHODES, Form 1442026-05-26: KEVIN J BREWER, Form 1442026-05-21: REBECA OBREGON-JIMENEZ, Form 1442026-05-20: BRIAN C WHITE, Form 1442026-05-20: KEVIN J BREWER REVOCABLE TRUST, Form 1442026-05-19: Thomas M. St. Dennis, Form 1442026-05-15: KELLEY LYNNE STEVEN-WAISS, Form 1442026-05-13: Titinger Jorge, Form 1442026-05-13: MIKE SLESSOR, Form 1442026-04-15: MIKE SLESSOR, Form 1442026-03-18: MIKE SLESSOR, Form 1442026-03-05: ARIC MCKINNIS, Form 1442026-02-24: BRIAN C WHITE, Form 1442026-02-18: MIKE SLESSOR, Form 1442026-02-11: KEVIN J BREWER REVOCABLE TRUST, Form 1442026-02-10: SHERI LYNN RHODES, Form 1442026-02-10: THOMAS M. ST. DENNIS, Form 1442026-02-10: KELLEY LYNNE STEVEN-WAISS, Form 1442026-02-09: REBECA OBREGON-JIMENEZ, Form 1442026-02-09: BRIAN C WHITE, Form 1442026-02-09: JORGE TITINGER, Form 1442026-01-15: MIKE SLESSOR, Form 1442026-01-06: MIKE SLESSOR, Form 1442025-12-17: MIKE SLESSOR, Form 1442025-12-02: KELLEY LYNNE STEVEN-WAISS, Form 1442025-11-19: MIKE SLESSOR, Form 1442025-11-17: Thomas M. St. Dennis, Form 1442025-11-04: SHAI SHAHAR, Form 1442025-11-17: St Dennis Thomas, sold2025-11-19: SLESSOR MIKE, sold2025-12-02: STEVEN-WAISS KELLEY, sold2025-12-17: SLESSOR MIKE, sold2026-01-06: SLESSOR MIKE, sold2026-01-15: SLESSOR MIKE, sold2026-02-09: Titinger Jorge, sold2026-02-09: WHITE BRIAN C, sold2026-02-09: Obregon-Jimenez Rebeca, sold2026-02-10: STEVEN-WAISS KELLEY, sold2026-02-10: Rhodes Sheri, sold2026-02-10: St Dennis Thomas, sold2026-02-11: BREWER KEVIN J, sold2026-02-18: SLESSOR MIKE, sold2026-02-24: WHITE BRIAN C, sold2026-03-05: McKinnis Aric Brendan, sold2026-03-18: SLESSOR MIKE, sold2026-04-15: SLESSOR MIKE, sold2026-05-13: SLESSOR MIKE, sold2026-05-13: Titinger Jorge, sold2026-05-15: STEVEN-WAISS KELLEY, sold2026-05-19: St Dennis Thomas, sold2026-05-20: WHITE BRIAN C, sold2026-05-21: Obregon-Jimenez Rebeca, sold2026-06-02: Rhodes Sheri, sold2026-06-10: SLESSOR MIKE, sold2026-06-15: St Dennis Thomas, sold
under a no plan named▼ salesize is dollars

Form 144 notices, newest first

2026-09-16MIKE SLESSOR, CEO$1,833,791
17,510 shplan 2025-08-19Form 4s on file end Jun 23144 ↗
2026-09-03KELLEY LYNNE STEVEN-WAISS, Director$201,810
2,100 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-14MIKE SLESSOR, CEO$2,095,492
16,002 shplan 2025-08-19Form 4s on file end Jun 23144 ↗
2026-07-15MIKE SLESSOR, CEO$560,197
4,735 shplan 2025-08-19Form 4s on file end Jun 23144 ↗
2026-06-15THOMAS M. ST. DENNIS, Director$424,172
2,800 shno plan date144 ↗
Form 4, 2026-06-16: sold 2,800 at $151.49 Form 4 ↗
2026-06-10MIKE SLESSOR, CEO$1,442,913
11,890 shplan 2025-08-19144 ↗
Form 4, 2026-06-11: sold 11,890 at $121.35The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. Form 4 ↗
2026-06-04KEVIN J BREWER, Former Director$326,112
2,528 shno plan dateForm 4s on file end Jun 23144 ↗
2026-06-02SHERI LYNN RHODES, Director$793,531
6,328 shno plan date144 ↗
Form 4, 2026-06-04: sold 6,328 at $125.40 Form 4 ↗
2026-05-26KEVIN J BREWER, Former Director$547,410
4,000 shno plan dateForm 4s on file end Jun 23144 ↗
2026-05-21REBECA OBREGON-JIMENEZ, Director$484,146
3,828 shno plan date144 ↗
Form 4, 2026-05-22: sold 3,828 at $126.48 Form 4 ↗
2026-05-20BRIAN C WHITE, Director$409,500
3,250 shno plan date144 ↗
Form 4, 2026-05-21: sold 3,250 at $126.00 Form 4 ↗
2026-05-20KEVIN J BREWER REVOCABLE TRUST, Board Member$195,982
1,577 shno plan dateForm 4s on file end Jun 23144 ↗
2026-05-19Thomas M. St. Dennis, Director$115,840
1,000 shno plan date144 ↗
Form 4, 2026-05-21: sold 1,000 at $115.84Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $115.80 through $115.84. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer... Form 4 ↗
2026-05-15KELLEY LYNNE STEVEN-WAISS, Director$678,241
5,400 shno plan date144 ↗
Form 4, 2026-05-15: sold 5,400 at $125.60 Form 4 ↗
2026-05-13Titinger Jorge, Director$516,299
4,009 shno plan date144 ↗
Form 4, 2026-05-15: sold 4,009 at $128.79 Form 4 ↗
2026-05-13MIKE SLESSOR, CEO$1,194,066
9,438 shplan 2025-08-19144 ↗
Form 4, 2026-05-14: sold 9,438 at $126.52The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. Form 4 ↗
2026-04-15MIKE SLESSOR, CEO$1,442,487
11,294 shplan 2025-08-19144 ↗
Form 4, 2026-04-15: sold 11,294 at $127.72The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. Form 4 ↗
2026-03-18MIKE SLESSOR, CEO$973,088
10,227 shplan 2025-08-19144 ↗
Form 4, 2026-03-18: sold 10,227 at $95.15The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025. Form 4 ↗
2026-03-05ARIC MCKINNIS, CFO, SVP Global Finance$313,034
3,462 shplan 2025-12-04144 ↗
Form 4, 2026-03-06: sold 3,462 at $90.42The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on December 4, 2025. Form 4 ↗
2026-02-24BRIAN C WHITE, Director$230,023
2,300 shno plan date144 ↗
Form 4, 2026-02-25: sold 2,300 at $100.01 Form 4 ↗
2026-02-18MIKE SLESSOR, CEO$815,577
8,664 shplan 2025-08-19144 ↗
Form 4, 2026-02-18: sold 8,664 at $94.14 Form 4 ↗
2026-02-11KEVIN J BREWER REVOCABLE TRUST, Board Member$288,600
3,000 shno plan date144 ↗
Form 4, 2026-02-12: sold 3,000 at $96.20 Form 4 ↗
2026-02-10SHERI LYNN RHODES, Director$706,973
7,634 shno plan date144 ↗
Form 4, 2026-02-11: sold 7,634 at $92.61 Form 4 ↗
2026-02-10THOMAS M. ST. DENNIS, Director$697,355
7,431 shno plan date144 ↗
Form 4, 2026-02-11: sold 7,431 at $93.84 Form 4 ↗
2026-02-10KELLEY LYNNE STEVEN-WAISS, Director$206,139
2,200 shno plan date144 ↗
Form 4, 2026-02-11: sold 2,200 at $93.70 Form 4 ↗
2026-02-09REBECA OBREGON-JIMENEZ, Director$265,422
2,770 shno plan date144 ↗
Form 4, 2026-02-10: sold 2,770 at $95.82 Form 4 ↗
2026-02-09BRIAN C WHITE, Director$500,225
5,500 shno plan date144 ↗
Form 4, 2026-02-10: sold 5,500 at $90.95 Form 4 ↗
2026-02-09JORGE TITINGER, Director$177,680
2,000 shno plan date144 ↗
Form 4, 2026-02-10: sold 2,000 at $88.84 Form 4 ↗
2026-01-15MIKE SLESSOR, CEO$1,005,296
13,088 shplan 2025-08-19144 ↗
Form 4, 2026-01-15: sold 13,088 at $76.81 Form 4 ↗
2026-01-06MIKE SLESSOR, CEO$2,574,390
39,606 shplan 2025-08-19144 ↗
Form 4, 2026-01-06: sold 39,606 at $65.00 Form 4 ↗
2025-12-17MIKE SLESSOR, CEO$432,236
7,669 shplan 2025-08-19144 ↗
Form 4, 2025-12-17: sold 7,669 at $56.36 Form 4 ↗
2025-12-02KELLEY LYNNE STEVEN-WAISS, Director$151,106
2,700 shno plan date144 ↗
Form 4, 2025-12-02: sold 2,700 at $55.97 Form 4 ↗
2025-11-19MIKE SLESSOR, CEO$420,671
8,403 shplan 2025-08-19144 ↗
Form 4, 2025-11-19: sold 8,403 at $50.06 Form 4 ↗
2025-11-17Thomas M. St. Dennis, Director$99,693
2,000 shno plan date144 ↗
Form 4, 2025-11-17: sold 2,000 at $49.85 Form 4 ↗
2025-11-04SHAI SHAHAR, CFO, SVP Global Finance$1,293,448
24,127 shno plan dateno Form 4 on file144 ↗