As of August 29, 2026, Fulcrum Therapeutics's top three insider holders are Kevin Tang (TenPercentOwner, 7.08Mn shares), Rock Ventures Iii, L.P. Third (TenPercentOwner, 1.96Mn shares), Rock Ventures Iii, L.P. Third (TenPercentOwner, 1.96Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Kevin Tang | TenPercentOwner | 0 | 7,080,945 | 7,080,945 | 72.6% | 20 Jul, 2026 |
| 2 | Rock Ventures Iii, L.P. Third | TenPercentOwner | 1,962,202 | 0 | 1,962,202 | 20.1% | 15 Dec, 2022 |
| 3 | Robert J Gould | Interim President Ceo | 454,864 | 0 | 454,864 | 4.7% | 04 Feb, 2026 |
| 4 | Alex Sapir | Director, Officer | 193,360 | 0 | 193,360 | 2.0% | 08 Jul, 2024 |
| 5 | Christopher Moxham | Chief Scientific Officer | 31,071 | 0 | 31,071 | 0.3% | 12 Aug, 2021 |
| 6 | Greg Tourangeau | Principal Accounting Officer | 14,062 | 0 | 14,062 | 0.1% | 09 May, 2025 |
| 7 | Alan Ezekowitz | Director | 10,927 | 0 | 10,927 | 0.1% | 30 Jun, 2026 |
| 8 | Curtis Gale Oltmans | Chief Legal Officer | 10,252 | 0 | 10,252 | 0.1% | 17 Dec, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 16 Jul, 2026 | Kevin Tang | TenPercentOwner | Acquired P | 116,671 | $3.56 | $415.35K | 7,030,000 | Indirect |
| 17 Jul, 2026 | Kevin Tang | TenPercentOwner | Acquired P | 50,945 | $3.52 | $179.33K | 7,080,945 | Indirect |
| 13 Jul, 2026 | Kevin Tang | TenPercentOwner | Acquired P | 12,966 | $3.54 | $45.90K | 6,676,349 | Indirect |
| 14 Jul, 2026 | Kevin Tang | TenPercentOwner | Acquired P | 53,651 | $3.56 | $191.00K | 6,730,000 | Indirect |
| 14 Jul, 2026 | Kevin Tang | TenPercentOwner | Acquired P | 75,952 | $3.58 | $271.91K | 6,805,952 | Indirect |
| 15 Jul, 2026 | Kevin Tang | TenPercentOwner | Acquired P | 107,377 | $3.56 | $382.26K | 6,913,329 | Indirect |
| 30 Jun, 2026 | James A Geraghty | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Alan Ezekowitz | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Rachel K. King | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Katina Dorton | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Colin Hill | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Robert J Gould | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Kate Haviland | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 30 Jun, 2026 | Sonja Banks | Director | Acquired A | 32,000 | $0.00 | $0 | 32,000 | Direct |
| 26 Jun, 2026 | Alan Ezekowitz | Director | Disposed S | 18,000 | $3.65 | $65.61K | 10,927 | Direct |
| 23 Apr, 2026 | Joshua Lehrer-Graiwer | Director | Acquired A | 64,000 | $0.00 | $0 | 64,000 | Direct |
| 02 Feb, 2026 | Alex Sapir | Director, Officer | Acquired A | 650,000 | $0.00 | $0 | 650,000 | Direct |
| 02 Feb, 2026 | Greg Tourangeau | Principal Accounting Officer | Acquired A | 57,000 | $0.00 | $0 | 57,000 | Direct |
| 02 Feb, 2026 | Greg Tourangeau | Principal Accounting Officer | Acquired A | 57,000 | $0.00 | $0 | 57,000 | Direct |
| 02 Feb, 2026 | Alex Sapir | Director, Officer | Acquired A | 650,000 | $0.00 | $0 | 650,000 | Direct |