As of March 23, 2026, the three largest insider holders of IMRX are Asset Management, Lp Cormorant (TenPercentOwner, 2.90Mn shares), Benjamin J. Zeskind (President And Ceo, 2.31Mn shares), Brett Matthew Hall (Chief Scientific Officer, 376.50K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Benjamin J. Zeskind | President And Ceo | 2,312,852 | 0 | 03 Jul, 2025 |
| Thomas J. Schall | 74,530 | 0 | 20 Jan, 2026 | |
| Leah R Neufeld | Chief People Officer | 29,598 | 0 | 17 Mar, 2026 |
| Mallory Morales | Chief Accounting Officer | 27,533 | 0 | 02 Oct, 2025 |
| Laurie Keating | 14,000 | 0 | 17 May, 2022 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 13 Mar, 2026 | Leah R Neufeld | Class A Common Stock | A | 3,628 | $4.29 | 29,598 | D | A |
| 03 Feb, 2026 | Igor Matushansky | Stock Option | A | 140,000 | $0.00 | 140,000 | D | A |
| 03 Feb, 2026 | Leah R Neufeld | Stock Option | A | 140,000 | $0.00 | 140,000 | D | A |
| 03 Feb, 2026 | Mallory Morales | Stock Option | A | 140,000 | $0.00 | 140,000 | D | A |
| 03 Feb, 2026 | Benjamin J. Zeskind | Stock Option | A | 688,000 | $0.00 | 688,000 | D | A |
| 15 Jan, 2026 | Thomas J. Schall | Class A Common Stock | A | 21,645 | $4.67 | 74,530 | D | P |
| 13 Jan, 2026 | Leah R Neufeld | Class A Common Stock | A | 2,626 | $4.15 | 25,970 | D | P |
| 01 Jan, 2026 | Laurie Keating | Stock Option | A | 7,888 | $0.00 | 7,888 | D | A |
| 01 Oct, 2025 | Leah R Neufeld | Class A Common Stock | A | 800 | $6.38 | 23,344 | D | P |
| 01 Oct, 2025 | Mallory Morales | Class A Common Stock | A | 300 | $6.39 | 27,533 | D | P |
| 15 Sep, 2025 | Leah R Neufeld | Class A Common Stock | A | 11,815 | $1.43 | 22,544 | D | A |
| 15 Sep, 2025 | Mallory Morales | Class A Common Stock | A | 14,497 | $1.43 | 27,233 | D | A |
| 02 Jul, 2025 | Leah R Neufeld | Class A Common Stock | A | 700 | $3.57 | 10,729 | D | P |
| 01 Jul, 2025 | Benjamin J. Zeskind | Class A Common Stock | A | 2,985 | $3.38 | 2,305,837 | D | P |
| 02 Jul, 2025 | Benjamin J. Zeskind | Class A Common Stock | A | 7,015 | $3.53 | 2,312,852 | D | P |
| 27 Jun, 2025 | Thomas J. Schall | Class A Common Stock | A | 9,500 | $3.66 | 52,885 | D | P |
| 18 Jun, 2025 | Benjamin J. Zeskind | Class A Common Stock | A | 21,000 | $2.39 | 2,302,852 | D | P |
| 17 Jun, 2025 | Thomas J. Schall | Class A Common Stock | A | 40,485 | $2.21 | 43,385 | D | P |
| 13 Jun, 2025 | Laurie Keating | Stock Option | A | 33,350 | $0.00 | 33,350 | D | A |
| 13 Jun, 2025 | Thomas J. Schall | Stock Option | A | 33,350 | $0.00 | 33,350 | D | A |