ERAS's three largest insider shareholders as of September 29, 2026 are Jonathan E Lim (Chairman Ceo, 32.36Mn shares), Jonathan E Lim (Chairman Ceo, 18.40Mn shares), Alexander W. Casdin (Director, 573.97K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Jonathan E Lim | Chairman Ceo | 0 | 32,355,576 | 32,355,576 | 95.8% | 06 Dec, 2023 |
| 2 | Alexander W. Casdin | Director | 573,974 | 0 | 573,974 | 1.7% | 22 May, 2024 |
| 3 | Lin Wei | Chief Medical Officer | 315,812 | 0 | 315,812 | 0.9% | 02 Feb, 2023 |
| 4 | David M. Chacko | Cfo And Cbo | 279,980 | 0 | 279,980 | 0.8% | 30 Jan, 2026 |
| 5 | Pratik S Multani | Director | 166,666 | 6,200 | 172,866 | 0.5% | 03 Jun, 2025 |
| 6 | Ebun Garner | Chief Legal Officer | 25,076 | 0 | 25,076 | 0.1% | 03 Apr, 2026 |
| 7 | Valerie Denise Harding Start | Director | 0 | 20,000 | 20,000 | 0.1% | 07 Dec, 2023 |
| 8 | James Arthur Bristol | Director | 0 | 20,000 | 20,000 | 0.1% | 22 Dec, 2022 |
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 |
|---|---|---|---|---|---|---|---|---|
| 10 Aug, 2026 | Charles S. Fuchs | President, Rd | Acquired A | 1,300,000 | $0.00 | $0 | 1,300,000 | Direct |
| 26 Jun, 2026 | Julie Hambleton | Director | Acquired A | 29,888 | $0.00 | $0 | 29,888 | Direct |
| 26 Jun, 2026 | Pratik S Multani | Director | Acquired A | 29,888 | $0.00 | $0 | 29,888 | Direct |
| 26 Jun, 2026 | Alexander W. Casdin | Director | Acquired A | 29,888 | $0.00 | $0 | 29,888 | Direct |
| 26 Jun, 2026 | Valerie Denise Harding Start | Director | Acquired A | 29,888 | $0.00 | $0 | 29,888 | Direct |
| 26 Jun, 2026 | James Arthur Bristol | Director | Acquired A | 29,888 | $0.00 | $0 | 29,888 | Direct |
| 26 Jun, 2026 | Jean I Liu | Director | Acquired A | 29,888 | $0.00 | $0 | 29,888 | Direct |
| 01 Apr, 2026 | Ebun Garner | Chief Legal Officer | Acquired M | 80,000 | $1.70 | $136.00K | 105,076 | Direct |
| 01 Apr, 2026 | Ebun Garner | Chief Legal Officer | Disposed S | 80,000 | $16.40 | $1.31Mn | 25,076 | Direct |
| 01 Apr, 2026 | Ebun Garner | Chief Legal Officer | Disposed M | 80,000 | $0.00 | $0 | 280,000 | Direct |
| 04 Mar, 2026 | Shannon Morris | Chief Medical Officer | Acquired M | 20,000 | $1.70 | $34.00K | 20,000 | Direct |
| 04 Mar, 2026 | Shannon Morris | Chief Medical Officer | Disposed S | 20,000 | $15.04 | $300.76K | 0 | Direct |
| 04 Mar, 2025 | Shannon Morris | Chief Medical Officer | Disposed M | 20,000 | $0.00 | $0 | 515,800 | Direct |
| 29 Jan, 2026 | Jonathan E Lim | Chairman Ceo | Acquired A | 2,000,000 | $0.00 | $0 | 2,000,000 | Direct |
| 15 Dec, 2025 | David M. Chacko | Cfo And Cbo | Acquired J | 17,793 | $1.19 | $21.25K | 279,980 | Direct |
| 29 Jan, 2026 | Michael David Varney | Director | Acquired A | 96,000 | $0.00 | $0 | 96,000 | Direct |
| 29 Jan, 2026 | Shannon Morris | Chief Medical Officer | Acquired A | 625,000 | $0.00 | $0 | 625,000 | Direct |
| 29 Jan, 2026 | Ebun Garner | General Counsel Corp. Sec. | Acquired A | 560,000 | $0.00 | $0 | 560,000 | Direct |
| 29 Jan, 2026 | David M. Chacko | Cfo And Cbo | Acquired A | 640,000 | $0.00 | $0 | 640,000 | Direct |
| 15 Dec, 2025 | Ebun Garner | General Counsel Corp. Sec. | Acquired A | 3,902 | $1.19 | $4.66K | 25,076 | Direct |