🕵️ Formfactor, Inc. ($FORM)
SEC insider & ownership activity, last 12 months · CIK 1039399 · every row links its SEC filing
Over the last 12 months insiders sold $18.1M with no open-market buying against it. Mike Slessor sold $10.9M through a program of 10 sale notices averaging $1.1M (Nov–Jul). 1 planned sale is pending, the largest $196K (Kevin J Brewer Revocable Trust). One red-flag 8-K in the window: Impairment (2.06), Jan 5, 2026.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 9 sellers, $18.1M (64 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Mike Slessor | 0 | – | 43 | $10.9M | Jul 15, 2026 |
| Rhodes Sheri | 0 | – | 2 | $1.5M | Jun 2, 2026 |
| Thomas M. St. Dennis | 0 | – | 5 | $1.3M | Jun 15, 2026 |
| Kelley Lynne Steven-Waiss | 0 | – | 4 | $1.1M | May 15, 2026 |
| Brian C. White | 0 | – | 3 | $1.1M | May 20, 2026 |
| Rebeca Obregon-Jimenez | 0 | – | 3 | $868K | May 21, 2026 |
| Jorge Titinger | 0 | – | 2 | $694K | May 13, 2026 |
| McKinnis Aric Brendan | 0 | – | 1 | $313K | Mar 5, 2026 |
| Kevin J Brewer | 0 | – | 1 | $289K | Feb 11, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 12.4% | 13G | Jul 28, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 7.6% | 13G | Apr 29, 2026 | filing ↗ | |
| Earnest Partners LLC | 6.3% | 13G | May 15, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.2% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Mike Slessor | $560K | Jul 15, 2026 | filing ↗ |
| Thomas M. St. Dennis | $424K | Jun 15, 2026 | filing ↗ |
| Mike Slessor | $1.4M | Jun 10, 2026 | filing ↗ |
| Kevin J Brewer | $326K | Jun 4, 2026 | filing ↗ |
| Sheri Lynn Rhodes | $794K | Jun 2, 2026 | filing ↗ |
| Kevin J Brewer | $547K | May 26, 2026 | filing ↗ |
| Rebeca Obregon-Jimenez | $484K | May 21, 2026 | filing ↗ |
| Brian C White | $410K | May 20, 2026 | filing ↗ |
| Kevin J Brewer Revocable Trust | $196K | May 20, 2026 | filing ↗ |
| Thomas M. St. Dennis | $116K | May 19, 2026 | filing ↗ |
| Kelley Lynne Steven-Waiss | $678K | May 15, 2026 | filing ↗ |
| Mike Slessor | $1.2M | May 13, 2026 | filing ↗ |
| Titinger Jorge | $516K | May 13, 2026 | filing ↗ |
| Mike Slessor | $1.4M | Apr 15, 2026 | filing ↗ |
| Mike Slessor | $973K | Mar 18, 2026 | filing ↗ |
| Aric McKinnis | $313K | Mar 5, 2026 | filing ↗ |
| Brian C White | $230K | Feb 24, 2026 | filing ↗ |
| Mike Slessor | $816K | Feb 18, 2026 | filing ↗ |
| Kevin J Brewer Revocable Trust | $289K | Feb 11, 2026 | filing ↗ |
| Sheri Lynn Rhodes | $707K | Feb 10, 2026 | filing ↗ |
| Thomas M. St. Dennis | $697K | Feb 10, 2026 | filing ↗ |
| Kelley Lynne Steven-Waiss | $206K | Feb 10, 2026 | filing ↗ |
| Rebeca Obregon-Jimenez | $265K | Feb 9, 2026 | filing ↗ |
| Brian C White | $500K | Feb 9, 2026 | filing ↗ |
| Jorge Titinger | $178K | Feb 9, 2026 | filing ↗ |
| Mike Slessor | $1.0M | Jan 15, 2026 | filing ↗ |
| Mike Slessor | $2.6M | Jan 6, 2026 | filing ↗ |
| Mike Slessor | $432K | Dec 17, 2025 | filing ↗ |
| Kelley Lynne Steven-Waiss | $151K | Dec 2, 2025 | filing ↗ |
| Mike Slessor | $421K | Nov 19, 2025 | filing ↗ |
| Thomas M. St. Dennis | $100K | Nov 17, 2025 | filing ↗ |
| Shai Shahar | $1.3M | Nov 4, 2025 | filing ↗ |
| Kelley Lynne Steven-Waiss | $110K | Sep 12, 2025 | filing ↗ |
| Rebeca Obregon-Jimenez | $118K | Aug 13, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 29, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 15, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | May 15, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 15, 2026 | filing ↗ |
| Earnings (2.02) | Apr 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 29, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 13, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 13, 2026 | filing ↗ |
| Earnings (2.02) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Exit or disposal costs (2.05) | Jan 5, 2026 | filing ↗ |
| Impairment (2.06) | Jan 5, 2026 | filing ↗ |
| Earnings (2.02) | Oct 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 29, 2025 | filing ↗ |
| Officer/director changes (5.02) | Aug 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2025 | filing ↗ |
| Material agreement (1.01) | Jul 29, 2025 | filing ↗ |
| Earnings (2.02) | Jul 29, 2025 | filing ↗ |
| New financial obligation (2.03) | Jul 29, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Jul 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 29, 2025 | filing ↗ |