As of June 09, 2026, Immuneering's top three insider holders are Asset Management, Lp Cormorant (TenPercentOwner, 2.90Mn shares), Benjamin J. Zeskind (President And Ceo, 2.31Mn shares), Asset Management, Lp Cormorant (Other, 2.25Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Robert J Carpenter | - | 1,148,839 | 0 | 04 Aug, 2021 |
| Ann E Berman | - | 67,465 | 0 | 19 Mar, 2024 |
| Thomas J. Schall | - | 74,530 | 0 | 20 Jan, 2026 |
| Diana Hausman | - | 2,500 | 3,000 | 07 Jul, 2025 |
| Asset Management, Lp Cormorant | - | 0 | 2,895,273 | 03 Apr, 2024 |
| Laurie Keating | - | 14,000 | 0 | 17 May, 2022 |
| Michael Bookman | Chief Legal Officer, Secretary | 4,870 | 0 | 02 Oct, 2025 |
| Scott Barrett | Chief Medical Officer | 7,563 | 0 | 22 Mar, 2022 |
| Benjamin J. Zeskind | President And Ceo | 2,312,852 | 0 | 03 Jul, 2025 |
| Peter Feinberg | - | 0 | 507,683 | 15 Sep, 2021 |
| Biren Amin | Cfo, Treasurer | 7,898 | 0 | 12 May, 2022 |
| Brett Matthew Hall | Chief Scientific Officer | 376,496 | 0 | 16 Jan, 2026 |
| Mallory Morales | Chief Accounting Officer | 27,533 | 0 | 02 Oct, 2025 |
| Leah R Neufeld | Chief People Officer | 29,598 | 0 | 17 Mar, 2026 |
| Harold Eugene Brakewood | Chief Business Officer | 11,050 | 0 | 21 Jan, 2026 |
* 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 |
| 13 Mar, 2026 | Leah R Neufeld | Class A Common Stock | A | 3,628 | $4.29 | 29,598 | 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 |
| 03 Feb, 2026 | Benjamin J. Zeskind | Stock Option | A | 688,000 | $0.00 | 688,000 | D | A |
| 03 Feb, 2026 | Leah R Neufeld | Stock Option | A | 140,000 | $0.00 | 140,000 | D | A |
| 03 Feb, 2026 | Harold Eugene Brakewood | 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 | Brett Matthew Hall | Stock Option | A | 344,000 | $0.00 | 344,000 | D | A |
| 03 Feb, 2026 | Michael Bookman | Stock Option | A | 176,000 | $0.00 | 176,000 | D | A |
| 03 Feb, 2026 | Igor Matushansky | Stock Option | A | 140,000 | $0.00 | 140,000 | D | A |
| 03 Feb, 2026 | Igor Matushansky | Stock Option | A | 140,000 | $0.00 | 140,000 | D | A |
| 16 Jan, 2026 | Harold Eugene Brakewood | Class A Common Stock | A | 5,250 | $4.76 | 11,050 | D | P |
| 15 Jan, 2026 | Thomas J. Schall | Class A Common Stock | A | 21,645 | $4.67 | 74,530 | D | P |
| 15 Jan, 2026 | Thomas J. Schall | Class A Common Stock | A | 21,645 | $4.67 | 74,530 | D | P |
| 15 Jan, 2026 | Brett Matthew Hall | Class A Common Stock | A | 2,298 | $4.57 | 376,496 | D | P |
| 13 Jan, 2026 | Leah R Neufeld | Class A Common Stock | A | 2,626 | $4.15 | 25,970 | D | P |
| 13 Jan, 2026 | Leah R Neufeld | Class A Common Stock | A | 2,626 | $4.15 | 25,970 | D | P |
| 12 Jan, 2026 | Peter Feinberg | Class A Common Stock | A | 20,000 | $4.35 | 135,441 | I | P |