Over the 90-day window ending December 12, 2025, Immuneering's three dominant insider ownership positions are held by Director Peter Feinberg (549.01K shares), Chief Accounting Officer Mallory Morales (27.53K shares), Chief People Officer Leah R Neufeld (23.34K 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 | 07 Oct, 2025 | |
| Brett Matthew Hall | Chief Scientific Officer | 374,198 | 17 Sep, 2025 |
| Ann E Berman | 67,465 | 19 Mar, 2024 | |
| Thomas J. Schall | 52,885 | 30 Jun, 2025 | |
| Mallory Morales | Chief Accounting Officer | 27,533 | 02 Oct, 2025 |
| Leah R Neufeld | Chief People Officer | 23,344 | 02 Oct, 2025 |
| Laurie Keating | 14,000 | 17 May, 2022 | |
| Biren Amin | CFO And Treasurer | 7,898 | 12 May, 2022 |
| Scott Barrett | Chief Medical Officer | 7,563 | 22 Mar, 2022 |
| Harold Eugene Brakewood | Chief Business Officer | 5,800 | 24 Jun, 2025 |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 03 Oct, 2025 | Peter Feinberg | Class A Common Stock | A | 7,500 | $6.67 | 156,766 | D | P |
| 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 |
| 01 Oct, 2025 | Michael Bookman | Class A Common Stock | A | 1,020 | $6.83 | 4,870 | 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 | - | - | 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 |
| 15 Sep, 2025 | Brett Matthew Hall | Class A Common Stock | A | 14,880 | $1.43 | 374,198 | D | A |
| 02 Jul, 2025 | Diana Hausman | - | - | 2,500 | D | |||
| 02 Jul, 2025 | Leah R Neufeld | Class A Common Stock | A | 700 | $3.57 | 10,729 | D | P |
| 02 Jul, 2025 | Diana Hausman | Class A Common Stock | A | 2,500 | $3.60 | 2,500 | D | P |
| 02 Jul, 2025 | Diana Hausman | Class A Common Stock | A | 3,000 | $3.62 | 3,000 | I | P |
| 02 Jul, 2025 | Diana Hausman | - | - | 3,000 | I | |||
| 01 Jul, 2025 | Benjamin J. Zeskind | - | - | 2,305,837 | D | |||
| 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 |
| 20 Jun, 2025 | Harold Eugene Brakewood | - | - | 5,800 | D |