FORM
FormFactor, Inc.
NASDAQ · Technology · Semiconductors · US
$103.90
+7.38%0
Insider buys (3m)
20
Insider sells (3m)
-$4.5M
Net value (3m)
-12.3%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Aug 17, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 686 | $133 |
| Aug 17, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 1,125 | $132 |
| Aug 17, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 5,535 | $133 |
| Aug 17, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 2,892 | $130 |
| Aug 17, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 3,282 | $131 |
| Aug 17, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 2,482 | $129 |
| Aug 10, 2026 | SLESSOR MIKE · director, officer: CEO | A-Award | 141,792 | $0.00 |
| Aug 10, 2026 | SLESSOR MIKE · director, officer: CEO | F-InKind | 78,908 | $117 |
| Aug 10, 2026 | McKinnis Aric Brendan · officer: CFO, SVP Global Finance | A-Award | 6,924 | $0.00 |
| Aug 10, 2026 | SLESSOR MIKE · director, officer: CEO | F-InKind | 3,288 | $117 |
| Aug 10, 2026 | SLESSOR MIKE · director, officer: CEO | M-Exempt | 141,792 | $0.00 |
| Aug 10, 2026 | SLESSOR MIKE · director, officer: CEO | A-Award | 27,696 | $0.00 |
| Aug 10, 2026 | SLESSOR MIKE · director, officer: CEO | M-Exempt | 5,908 | $0.00 |
| Aug 7, 2026 | McKinnis Aric Brendan · officer: CFO, SVP Global Finance | F-InKind | 130 | $114 |
| Aug 7, 2026 | McKinnis Aric Brendan · officer: CFO, SVP Global Finance | M-Exempt | 1,099 | $0.00 |
| Aug 7, 2026 | McKinnis Aric Brendan · officer: CFO, SVP Global Finance | F-InKind | 274 | $115 |
| Aug 7, 2026 | SLESSOR MIKE · director, officer: CEO | M-Exempt | 6,031 | $0.00 |
| Aug 7, 2026 | SLESSOR MIKE · director, officer: CEO | F-InKind | 2,028 | $114 |
| Aug 7, 2026 | SLESSOR MIKE · director, officer: CEO | M-Exempt | 3,644 | $0.00 |
| Aug 7, 2026 | SLESSOR MIKE · director, officer: CEO | F-InKind | 3,357 | $115 |
| Aug 7, 2026 | McKinnis Aric Brendan · officer: CFO, SVP Global Finance | M-Exempt | 521 | $0.00 |
| Jul 16, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 868 | $121 |
| Jul 16, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 1,650 | $117 |
| Jul 16, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 706 | $118 |
| Jul 16, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 1,041 | $117 |
| Jul 16, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 300 | $121 |
| Jul 16, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 170 | $119 |
| Jun 16, 2026 | St Dennis Thomas · director | Sale | 2,800 | $151 |
| Jun 11, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 2,500 | $123 |
| Jun 11, 2026 | SLESSOR MIKE · director, officer: CEO | Sale | 400 | $119 |
Institutional positioning
13F filings over the trailing two quarters
New 266Increased 280Reduced 292Sold out 45
| Filer | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 12,247,574 | May 13, 2026 |
| BlackRock, Inc. | Reduced | 10,484,409 | Aug 7, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 5,880,008 | May 8, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 5,242,203 | Aug 13, 2026 |
| EARNEST PARTNERS LLC | Reduced | 4,875,165 | May 15, 2026 |
| EARNEST PARTNERS LLC | Reduced | 3,763,214 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 3,515,254 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 3,472,491 | May 15, 2026 |
| STATE STREET CORP | Increased | 2,928,139 | May 15, 2026 |
| STATE STREET CORP | Reduced | 2,581,477 | Aug 7, 2026 |
| BANK OF AMERICA CORP /DE/ | Reduced | 2,481,059 | May 18, 2026 |
| POLAR CAPITAL HOLDINGS PLC | New Position | 2,292,313 | May 15, 2026 |
| ALLIANCEBERNSTEIN L.P. | Increased | 2,231,533 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2,187,865 | May 15, 2026 |
| Polar Capital Holdings Plc | Reduced | 2,146,098 | Aug 14, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Aug 17, 2026