IMA's three largest insider shareholders as of September 09, 2026 are Jonathan Jian Wang (Director, 1.12Mn shares), David P Bonita (Director, 465.16K shares), Otello Stampacchia (Director, 455.36K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Jonathan Jian Wang | Director | 143,832 | 971,173 | 1,115,005 | 42.0% | 15 Aug, 2025 |
| 2 | David P Bonita | Director | 32 | 489,150 | 489,181 | 18.4% | 30 Jul, 2025 |
| 3 | Otello Stampacchia | Director | 379 | 454,982 | 455,361 | 17.1% | 30 Jul, 2025 |
| 4 | Kristin Yarema | Chief Executive Officer | 238,905 | 0 | 238,905 | 9.0% | 28 Jul, 2026 |
| 5 | Yanina Grant-Huerta | Chief Financial Officer | 104,000 | 0 | 104,000 | 3.9% | 17 Aug, 2026 |
| 6 | Maude Tessier | Chief Business Officer | 100,578 | 0 | 100,578 | 3.8% | 20 Jan, 2022 |
| 7 | Robert B Lally | Principal Accounting Officer | 55,582 | 0 | 55,582 | 2.1% | 20 Jul, 2026 |
| 8 | Xiaoyan Michelle Zhang | Chief Scientific Officer | 44,475 | 0 | 44,475 | 1.7% | 12 Jan, 2022 |
| 9 | Erin Butler | Principal Accounting Officer | 25,551 | 0 | 25,551 | 1.0% | 02 Jan, 2026 |
| 10 | Joseph P Slattery | Director | 16,000 | 0 | 16,000 | 0.6% | 29 Dec, 2025 |
| 11 | Jotin Marango | Chief Financial Officer | 11,146 | 0 | 11,146 | 0.4% | 29 Jul, 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 |
|---|---|---|---|---|---|---|---|---|
| 14 Aug, 2026 | Yanina Grant-Huerta | Chief Financial Officer | Acquired A | 65,000 | $0.00 | $0 | 65,000 | Direct |
| 14 Aug, 2026 | Yanina Grant-Huerta | Chief Financial Officer | Acquired A | 39,000 | $0.00 | $0 | 104,000 | Direct |
| 14 Aug, 2026 | Yanina Grant-Huerta | Chief Financial Officer | Acquired A | 56,000 | $0.00 | $0 | 56,000 | Direct |
| 25 Jul, 2026 | Kristin Yarema | Chief Executive Officer | Acquired M | 38,376 | $0.00 | $0 | 123,776 | Direct |
| 25 Jul, 2026 | Kristin Yarema | Chief Executive Officer | Acquired J | 115,129 | $0.00 | $0 | 238,905 | Direct |
| 25 Jul, 2026 | Kristin Yarema | Chief Executive Officer | Disposed M | 38,376 | $0.00 | $0 | 115,129 | Direct |
| 25 Jul, 2026 | Kristin Yarema | Chief Executive Officer | Disposed J | 115,129 | $0.00 | $0 | 0 | Direct |
| 16 Jul, 2026 | Robert B Lally | Principal Accounting Officer | Disposed S | 1,671 | $5.50 | $9.19K | 57,107 | Direct |
| 17 Jul, 2026 | Robert B Lally | Principal Accounting Officer | Disposed S | 1,525 | $5.34 | $8.14K | 55,582 | Direct |
| 16 Jun, 2026 | Otello Stampacchia | Director | Acquired A | 15,600 | $0.00 | $0 | 15,600 | Direct |
| 16 Jun, 2026 | Joseph P Slattery | Director | Acquired A | 15,600 | $0.00 | $0 | 15,600 | Direct |
| 16 Jun, 2026 | Jonathan Jian Wang | Director | Acquired A | 15,600 | $0.00 | $0 | 15,600 | Direct |
| 14 Apr, 2026 | David P Bonita | Director | Acquired P | 336,603 | — | — | 336,603 | Indirect |
| 14 Apr, 2026 | David P Bonita | Director | Acquired P | 384,689 | — | — | 384,689 | Indirect |
| 30 Dec, 2025 | Erin Butler | Principal Accounting Officer | Acquired A | 22,500 | $0.00 | $0 | 25,551 | Direct |
| 30 Dec, 2025 | Erin Butler | Principal Accounting Officer | Acquired A | 22,500 | $0.00 | $0 | 22,500 | Direct |
| 24 Dec, 2025 | Joseph P Slattery | Director | Acquired P | 16,000 | $5.99 | $95.84K | 16,000 | Direct |
| 18 Dec, 2025 | Jonathan Jian Wang | Director | Acquired A | 31,200 | $0.00 | $0 | 31,200 | Direct |
| 18 Dec, 2025 | Jonathan Jian Wang | Director | Acquired A | 31,200 | $0.00 | $0 | 31,200 | Direct |
| 18 Dec, 2025 | Stephen Hui Wang | Director | Acquired A | 31,200 | $0.00 | $0 | 31,200 | Direct |