As of April 25, 2026, Formfactor's top three insider holders are Mike Slessor (Ceo, 460.86K shares), Mike Slessor (Ceo, 449.56K shares), Raymond A Link (Director, 66.22K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Mike Slessor | Ceo | 460,859 | 0 | 18 Mar, 2026 |
| Mike Slessor | Ceo | 449,565 | 0 | 15 Apr, 2026 |
| Raymond A Link | - | 66,225 | 0 | 30 May, 2023 |
| Raymond A Link | - | 66,225 | 0 | 30 May, 2023 |
| Shai Shahar | Cfo, Svp Global Finance | 55,968 | 0 | 08 Aug, 2025 |
| Shai Shahar | Cfo, Svp Global Finance | 55,968 | 0 | 08 Aug, 2025 |
| Dennis Thomas St | Executive Chairman | 31,526 | 0 | 11 Feb, 2026 |
| Dennis Thomas St | Executive Chairman | 31,526 | 0 | 11 Feb, 2026 |
| Kelley Steven-Waiss | - | 30,579 | 0 | 11 Feb, 2026 |
| Kelley Steven-Waiss | - | 30,579 | 0 | 11 Feb, 2026 |
| Jorge Titinger | - | 17,498 | 0 | 10 Feb, 2026 |
| Jorge Titinger | - | 17,498 | 0 | 10 Feb, 2026 |
| Rebeca Obregon-Jimenez | - | 13,126 | 0 | 13 Aug, 2025 |
| Rebeca Obregon-Jimenez | - | 13,126 | 0 | 13 Aug, 2025 |
| Aric Brendan Mckinnis | Cfo, Svp Global Finance | 11,140 | 0 | 06 Mar, 2026 |
| Aric Brendan Mckinnis | Cfo, Svp Global Finance | 11,140 | 0 | 06 Mar, 2026 |
| Brian C White | - | 10,556 | 0 | 25 Feb, 2026 |
| Brian C White | - | 10,556 | 0 | 25 Feb, 2026 |
| Rebeca Obregon-Jimenez | - | 10,356 | 0 | 10 Feb, 2026 |
| Sheri Rhodes | - | 10,356 | 0 | 11 Feb, 2026 |
| Sheri Rhodes | - | 10,356 | 0 | 11 Feb, 2026 |
| Rebeca Obregon-Jimenez | - | 10,356 | 0 | 10 Feb, 2026 |
| Kevin J Brewer | - | 8,105 | 0 | 12 Feb, 2026 |
| Lothar Maier | - | 6,770 | 0 | 15 May, 2024 |
| Lothar Maier | - | 6,770 | 0 | 15 May, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | Mike Slessor | Common Stock | D | 1,826 | $125.24 | 459,033 | D | S |
| 15 Apr, 2026 | Mike Slessor | Common Stock | D | 900 | $126.58 | 458,133 | D | S |
| 15 Apr, 2026 | Mike Slessor | Common Stock | D | 2,369 | $127.65 | 455,764 | D | S |
| 15 Apr, 2026 | Mike Slessor | Common Stock | D | 5,432 | $128.56 | 450,332 | D | S |
| 15 Apr, 2026 | Mike Slessor | Common Stock | D | 767 | $129.22 | 449,565 | D | S |
| 18 Mar, 2026 | Mike Slessor | Common Stock | D | 1,900 | $94.10 | 469,186 | D | S |
| 18 Mar, 2026 | Mike Slessor | Common Stock | D | 1,900 | $94.10 | 469,186 | D | S |
| 18 Mar, 2026 | Mike Slessor | Common Stock | D | 5,495 | $95.21 | 463,691 | D | S |
| 18 Mar, 2026 | Mike Slessor | Common Stock | D | 5,495 | $95.21 | 463,691 | D | S |
| 18 Mar, 2026 | Mike Slessor | Common Stock | D | 2,832 | $95.73 | 460,859 | D | S |
| 18 Mar, 2026 | Mike Slessor | Common Stock | D | 2,832 | $95.73 | 460,859 | D | S |
| 05 Mar, 2026 | Aric Brendan Mckinnis | Common Stock | D | 3,462 | $90.42 | 11,140 | D | S |
| 05 Mar, 2026 | Aric Brendan Mckinnis | Common Stock | D | 3,462 | $90.42 | 11,140 | D | S |
| 02 Mar, 2026 | Aric Brendan Mckinnis | Common Stock | A | 773 | $0.00 | 14,795 | D | M |
| 02 Mar, 2026 | Aric Brendan Mckinnis | Common Stock | A | 773 | $0.00 | 14,795 | D | M |
| 02 Mar, 2026 | Aric Brendan Mckinnis | Common Stock | D | 193 | $99.70 | 14,602 | D | F |
| 02 Mar, 2026 | Aric Brendan Mckinnis | Common Stock | D | 193 | $99.70 | 14,602 | D | F |
| 02 Mar, 2026 | Aric Brendan Mckinnis | Restricted Stock Units | D | 773 | $0.00 | 773 | D | M |
| 02 Mar, 2026 | Aric Brendan Mckinnis | Restricted Stock Units | D | 773 | $0.00 | 773 | D | M |
| 24 Feb, 2026 | Brian C White | Common Stock | D | 2,300 | $100.01 | 10,556 | D | S |