Immuneering Corporation (IMRX) has 19 known insider and institutional holders on record. The largest holder is Cormorant Asset Management, LP with 2,895,273 shares. Other notable holders include SAINTS CAPITAL EVEREST LP and Zeskind Benjamin J..
Over the last 12 months, insiders have made 41 transactions in IMRX stock — 41 buys (valued at $9.95M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
IMRX Insider Ownership
Top Holder
Cormorant Asset Management, LP
2,895,273 shares
Buys (12 mo)
41
$9.95M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Cormorant Asset Management, Lp |
10 Percent Owner |
2,895,273 |
2024-04-03 |
|
| 2 |
Saints Capital Everest Lp |
10 Percent Owner |
1,176,471 |
2008-09-26 |
|
| 3 |
Zeskind Benjamin J. |
President and CEO |
688,000 |
2026-02-05 |
|
| 4 |
Hall Brett Matthew |
Chief Scientific Officer |
344,000 |
2026-02-05 |
|
| 5 |
Bookman Michael |
Chief Legal Officer, Secretary |
176,000 |
2026-02-05 |
|
| 6 |
Morales Mallory |
SVP Finance, CAO |
140,000 |
2026-02-05 |
|
| 7 |
Brakewood Harold Eugene |
Chief Business Officer |
140,000 |
2026-02-05 |
|
| 8 |
Matushansky Igor |
Chief Medical Officer |
140,000 |
2026-02-05 |
|
| 9 |
Feinberg Peter |
Director |
135,441 |
2026-01-14 |
|
| 10 |
Barrett Scott |
Chief Medical Officer |
110,000 |
2023-02-17 |
|
| 11 |
Ontiveros Kevin |
VP, Legal Affairs and Gc |
87,335 |
2007-12-20 |
|
| 12 |
Schall Thomas J. |
Director |
74,530 |
2026-01-20 |
|
| 13 |
Carpenter Robert J |
Director |
33,350 |
2025-06-16 |
|
| 14 |
Berman Ann E |
Director |
33,350 |
2025-06-16 |
|
| 15 |
Neufeld Leah R |
Chief People Officer |
29,598 |
2026-03-17 |
|
| 16 |
Amin Biren |
CFO, Treasurer |
7,898 |
2022-05-12 |
|
| 17 |
Keating Laurie |
Director |
7,888 |
2026-01-02 |
|
| 18 |
Love Richard L |
Director |
3,333 |
2008-06-03 |
|
| 19 |
Hausman Diana |
Director |
2,500 |
2025-07-07 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-13 |
Neufeld Leah R |
Chief People Officer |
RSU Award |
3,628 |
$4.29 |
$15.57K |
| 2026-02-03 |
Brakewood Harold Eugene |
Chief Business Officer |
RSU Award |
140,000 |
$4.91 |
$687.4K |
| 2026-02-03 |
Neufeld Leah R |
Chief People Officer |
RSU Award |
140,000 |
$4.91 |
$687.4K |
| 2026-02-03 |
Morales Mallory |
SVP Finance, CAO |
RSU Award |
140,000 |
$4.91 |
$687.4K |
| 2026-02-03 |
Hall Brett Matthew |
Chief Scientific Officer |
RSU Award |
344,000 |
$4.91 |
$1.69M |
| 2026-02-03 |
Zeskind Benjamin J. |
President and CEO |
RSU Award |
688,000 |
$4.91 |
$3.38M |
| 2026-02-03 |
Bookman Michael |
Chief Legal Officer, Secretary |
RSU Award |
176,000 |
$4.91 |
$864.16K |
| 2026-02-03 |
Matushansky Igor |
Chief Medical Officer |
RSU Award |
140,000 |
$4.91 |
$687.4K |
| 2026-01-16 |
Brakewood Harold Eugene |
Chief Business Officer |
Informative Buy |
5,250 |
$4.76 |
$24.99K |
| 2026-01-15 |
Schall Thomas J. |
Director |
Informative Buy |
21,645 |
$4.67 |
$101.04K |
| 2026-01-15 |
Hall Brett Matthew |
Chief Scientific Officer |
Informative Buy |
2,298 |
$4.57 |
$10.5K |
| 2026-01-13 |
Neufeld Leah R |
Chief People Officer |
Informative Buy |
2,626 |
$4.15 |
$10.91K |
| 2026-01-12 |
Feinberg Peter |
Director |
Informative Buy |
20,000 |
$4.35 |
$86.9K |
| 2026-01-01 |
Feinberg Peter |
Director |
RSU Award |
7,888 |
$6.58 |
$51.9K |
| 2026-01-01 |
Keating Laurie |
Director |
RSU Award |
7,888 |
$6.58 |
$51.9K |
| 2025-10-03 |
Feinberg Peter |
Director |
Informative Buy |
7,500 |
$6.67 |
$50.03K |
| 2025-10-01 |
Neufeld Leah R |
Chief People Officer |
Informative Buy |
800 |
$6.38 |
$5.1K |
| 2025-10-01 |
Morales Mallory |
Chief Accounting Officer |
Informative Buy |
300 |
$6.39 |
$1.92K |
| 2025-10-01 |
Bookman Michael |
Chief Legal Officer, Secretary |
Informative Buy |
1,020 |
$6.83 |
$6.97K |
| 2025-09-30 |
Feinberg Peter |
Director |
Informative Buy |
7,500 |
$7.03 |
$52.73K |
| 2025-09-29 |
Feinberg Peter |
Director |
Informative Buy |
5,000 |
$7.18 |
$35.9K |
| 2025-09-15 |
Neufeld Leah R |
Chief People Officer |
RSU Award |
11,815 |
$1.43 |
$16.87K |
| 2025-09-15 |
Morales Mallory |
Chief Accounting Officer |
RSU Award |
14,497 |
$1.43 |
$20.7K |
| 2025-09-15 |
Hall Brett Matthew |
Chief Scientific Officer |
RSU Award |
14,880 |
$1.43 |
$21.25K |
| 2025-07-02 |
Neufeld Leah R |
Chief People Officer |
Informative Buy |
700 |
$3.57 |
$2.5K |
