As of May 30, 2026, the three largest insider holders of IMNM are Isaac Barchas (Director, 4.07Mn shares), Michael Rapp (Director, 1.07Mn shares), Clay B Siegall (President And Ceo, 690.70K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Clay B Siegall | President And Ceo | 690,704 | 0 | 31 Mar, 2026 |
| John L Lamattina | - | 66,953 | 0 | 17 Jan, 2023 |
| Jean Jacques Bienaime | - | 38,415 | 0 | 12 Mar, 2026 |
| Franklyn G Prendergast | - | 60,840 | 0 | 02 Oct, 2023 |
| Richard A Baron | - | 2,343 | 0 | 20 Aug, 2021 |
| Philip Wagenheim | - | 341,147 | 0 | 23 Mar, 2026 |
| Michael Rapp | - | 1,071,172 | 0 | 03 Oct, 2023 |
| Isaac Barchas | - | 0 | 4,073,613 | 23 Dec, 2025 |
| Michael Lefenfeld | - | 40,747 | 0 | 17 Jan, 2023 |
| Bruce Turner | Chief Strategy Officer | 42,300 | 0 | 02 Oct, 2023 |
| Jack Higgins | Chief Scientific Officer | 22,000 | 0 | 03 Apr, 2026 |
| Max Rosett | Chief Financial Officer | 54,037 | 0 | 03 Apr, 2026 |
| Robert Lechleider | Chief Medical Officer | 15,805 | 0 | 21 Nov, 2024 |
| Philip Tsai | Chief Technical Officer | 43,300 | 0 | 22 Dec, 2025 |
* 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 Apr, 2026 | Max Rosett | Common Stock | A | 31,848 | $1.05 | 79,324 | D | M |
| 02 Apr, 2026 | Max Rosett | Common Stock | A | 31,848 | $1.05 | 79,324 | D | M |
| 02 Apr, 2026 | Jack Higgins | Common Stock | D | 9,438 | $21.64 | 22,000 | D | S |
| 02 Apr, 2026 | Max Rosett | Common Stock | A | 39,713 | $1.35 | 119,037 | D | M |
| 02 Apr, 2026 | Max Rosett | Common Stock | A | 39,713 | $1.35 | 119,037 | D | M |
| 02 Apr, 2026 | Max Rosett | Common Stock | D | 63,656 | $21.91 | 55,381 | D | S |
| 02 Apr, 2026 | Max Rosett | Common Stock | D | 63,656 | $21.91 | 55,381 | D | S |
| 02 Apr, 2026 | Max Rosett | Common Stock | D | 1,344 | $22.48 | 54,037 | D | S |
| 02 Apr, 2026 | Max Rosett | Common Stock | D | 1,344 | $22.48 | 54,037 | D | S |
| 02 Apr, 2026 | Max Rosett | Stock option (right to buy) | D | 31,848 | $0.00 | 60,000 | D | M |
| 02 Apr, 2026 | Max Rosett | Stock option (right to buy) | D | 31,848 | $0.00 | 60,000 | D | M |
| 02 Apr, 2026 | Max Rosett | Stock option (right to buy) | D | 39,713 | $0.00 | 0 | D | M |
| 02 Apr, 2026 | Max Rosett | Stock option (right to buy) | D | 39,713 | $0.00 | 0 | D | M |
| 30 Mar, 2026 | Jack Higgins | Common Stock | D | 6,291 | $0.00 | 31,438 | D | G |
| 27 Mar, 2026 | Clay B Siegall | Common Stock | A | 25,450 | $19.67 | 690,704 | D | P |
| 20 Mar, 2026 | Philip Wagenheim | Common Stock | D | 36,800 | $20.47 | 369,347 | D | S |
| 20 Mar, 2026 | Philip Wagenheim | Common Stock | D | 36,800 | $20.47 | 369,347 | D | S |
| 23 Mar, 2026 | Philip Wagenheim | Common Stock | D | 28,200 | $20.65 | 341,147 | D | S |
| 23 Mar, 2026 | Philip Wagenheim | Common Stock | D | 28,200 | $20.65 | 341,147 | D | S |
| 10 Mar, 2026 | Jean Jacques Bienaime | Common Stock | A | 1,000 | $22.12 | 37,415 | D | P |