Data spanning the past 90 days through February 07, 2026 reveals that Immuneering's three principal insider shareholders consist of TenPercentOwner Asset Management, Lp Cormorant (2.90Mn shares), President And Ceo Benjamin J. Zeskind (2.31Mn shares), Director Robert J Carpenter (1.15Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Asset Management, Lp Cormorant | 2,895,273 | 03 Apr, 2024 | |
| Benjamin J. Zeskind | President And Ceo | 2,312,852 | 03 Jul, 2025 |
| Robert J Carpenter | 1,148,839 | 04 Aug, 2021 | |
| Peter Feinberg | 549,008 | 14 Jan, 2026 | |
| Brett Matthew Hall | Chief Scientific Officer | 376,496 | 16 Jan, 2026 |
| Thomas J. Schall | 74,530 | 20 Jan, 2026 | |
| Ann E Berman | 67,465 | 19 Mar, 2024 | |
| Mallory Morales | Chief Accounting Officer | 27,533 | 02 Oct, 2025 |
| Leah R Neufeld | Chief People Officer | 25,970 | 15 Jan, 2026 |
| Laurie Keating | 14,000 | 17 May, 2022 | |
| Harold Eugene Brakewood | Chief Business Officer | 11,050 | 21 Jan, 2026 |
| Biren Amin | Cfo And Treasurer | 7,898 | 12 May, 2022 |
| Scott Barrett | Chief Medical Officer | 7,563 | 22 Mar, 2022 |
| Diana Hausman | 5,500 | 07 Jul, 2025 | |
| Michael Bookman | Chief Legal Officer And Secretary | 4,870 | 02 Oct, 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 |
|---|---|---|---|---|---|---|---|---|
| 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 | 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 |
| 12 Jan, 2026 | Peter Feinberg | Class A Common Stock | A | 20,000 | $4.35 | 156,766 | D | P |
| 03 Oct, 2025 | Peter Feinberg | Class A Common Stock | A | 7,500 | $6.67 | 156,766 | D | P |
| 01 Oct, 2025 | Michael Bookman | Class A Common Stock | A | 1,020 | $6.83 | 4,870 | D | P |
| 01 Oct, 2025 | Mallory Morales | - | - | 27,533 | D | |||
| 01 Oct, 2025 | Mallory Morales | Class A Common Stock | A | 300 | $6.39 | 27,533 | D | P |
| 01 Oct, 2025 | Leah R Neufeld | Class A Common Stock | A | 800 | $6.38 | 23,344 | D | P |
| 30 Sep, 2025 | Peter Feinberg | Class A Common Stock | A | 7,500 | $7.03 | 149,266 | D | P |
| 29 Sep, 2025 | Peter Feinberg | Class A Common Stock | A | 5,000 | $7.18 | 141,766 | D | P |
| 15 Sep, 2025 | Brett Matthew Hall | Class A Common Stock | A | 14,880 | $1.43 | 374,198 | D | A |
| 15 Sep, 2025 | Brett Matthew Hall | - | - | 374,198 | D | |||
| 15 Sep, 2025 | Mallory Morales | Class A Common Stock | A | 14,497 | $1.43 | 27,233 | D | A |
| 15 Sep, 2025 | Leah R Neufeld | Class A Common Stock | A | 11,815 | $1.43 | 22,544 | D | A |
| 02 Jul, 2025 | Diana Hausman | Class A Common Stock | A | 2,500 | $3.60 | 2,500 | D | P |
| 02 Jul, 2025 | Diana Hausman | - | - | 3,000 | I | |||
| 02 Jul, 2025 | Diana Hausman | - | - | 2,500 | D | |||
| 02 Jul, 2025 | Diana Hausman | Class A Common Stock | A | 3,000 | $3.62 | 3,000 | I | P |