According to recent filings covering the 90 days ending January 10, 2026, the three most significant insider holders at Fulcrum Therapeutics are TenPercentOwner Capital Management, L.P. Ra (6.05Mn shares), Director Mark J Levin (3.96Mn shares), TenPercentOwner Rock Ventures Iii, L.P. Third (1.96Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Capital Management, L.P. Ra | 6,053,960 | 10 Dec, 2025 | |
| Mark J Levin | 3,962,202 | 12 Nov, 2021 | |
| Rock Ventures Iii, L.P. Third | 1,962,202 | 15 Dec, 2022 | |
| Robert J Gould | 469,864 | 06 Jan, 2026 | |
| Alex Sapir | Nan | 193,360 | 08 Jul, 2024 |
| James A Geraghty | 90,714 | 29 Jun, 2021 | |
| Greg Tourangeau | Principal Accounting Officer | 14,062 | 09 May, 2025 |
| Curtis Gale Oltmans | Chief Legal Officer | 10,252 | 17 Dec, 2025 |
| Peter G. Thomson | Vp Finance & Accounting | 2,300 | 29 Jun, 2021 |
| Christopher Morabito | Chief Medical Officer | 1,100 | 29 Jun, 2021 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 02 Jan, 2026 | Robert J Gould | Common Stock | D | 15,000 | $11.87 | 469,864 | D | S |
| 15 Dec, 2025 | Curtis Gale Oltmans | Common Stock | D | 3,452 | $12.92 | 10,252 | D | S |
| 15 Dec, 2025 | Curtis Gale Oltmans | - | - | 10,252 | D | |||
| 08 Dec, 2025 | Capital Management, L.P. Ra | - | - | 6,145,682 | I | |||
| 08 Dec, 2025 | Capital Management, L.P. Ra | - | - | 6,053,960 | I | |||
| 08 Dec, 2025 | Capital Management, L.P. Ra | Common Stock | D | 2,706,397 | $14.28 | 6,145,682 | I | S |
| 08 Dec, 2025 | Capital Management, L.P. Ra | Common Stock | D | 91,722 | $14.98 | 6,053,960 | I | S |
| 08 Dec, 2025 | Capital Management, L.P. Ra | Common Stock | D | 1,377,020 | $13.33 | 8,852,079 | I | S |
| 08 Dec, 2025 | Capital Management, L.P. Ra | - | - | 8,852,079 | I | |||
| 19 Nov, 2025 | Robert J Gould | Common Stock | D | 15,000 | $11.03 | 484,864 | D | S |
| 08 May, 2025 | Greg Tourangeau | - | - | 14,062 | D | |||
| 08 May, 2025 | Greg Tourangeau | Common Stock | D | 498 | $5.06 | 14,062 | D | S |
| 21 Aug, 2024 | Capital Management, L.P. Ra | - | - | 3,109,704 | I | |||
| 21 Aug, 2024 | Capital Management, L.P. Ra | Common Stock | D | 8,500,000 | - | 3,109,704 | I | J |
| 03 Jul, 2024 | Alex Sapir | - | - | 193,360 | D | |||
| 03 Jul, 2024 | Alex Sapir | Common Stock | A | 150,000 | $3.27 | 193,360 | D | M |
| 07 May, 2024 | Greg Tourangeau | - | - | 11,571 | D | |||
| 07 May, 2024 | Greg Tourangeau | Common Stock | D | 236 | $7.76 | 11,571 | D | S |
| 08 Mar, 2024 | Greg Tourangeau | Common Stock | D | 4,884 | $11.72 | 11,807 | D | S |
| 04 Mar, 2024 | Alex Sapir | - | - | 43,360 | D |