Immuneering Corp

IMRX

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001790340

SEC filings (opens in a new tab)

No open-market purchases or sales by Immuneering Corp insiders were filed in the last 90 days; 111 institutions reported holding it in 13F filings for Q2 2026, worth $171.6M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Immuneering Corp changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of IMRX: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	85	3	96	+14
Shares	31.7M	2.87M	29.3M	+478.0K (+1.7%)
Value	$208.6M	$18.9M	$154.3M	−$35.4M (−18.7%)

3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (30)

Institutions that held Immuneering Corp at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to IMRX in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Capital Management LLC	2,288,341	$12.1M	0.00%
Summit Financial, LLC	376,749	$1.99M	0.03%
Vanguard Fiduciary Trust Co	322,038	$1.70M	0.00%
Wellington Management Group LLP	156,424	$824.4K	0.00%
Prosight Management, LP	123,409	$650.4K	0.11%
PVG Asset Management Corp	146,661	$614.5K	0.36%
Weiss Asset Management LP	87,985	$463.7K	0.01%
Brevan Howard Capital Management LP	86,236	$454.5K	0.00%
Gsa Capital Partners LLP	76,752	$404.0K	0.03%
Clearstead Advisors, LLC	60,865	$320.8K	0.00%
HRT Financial LP	42,456	$223.0K	0.00%
HSBC Holdings PLC	37,771	$197.5K	0.00%
American Century Companies Inc	34,224	$180.4K	0.00%
Oppenheimer & Co Inc	34,000	$179.2K	0.00%
Vanguard Global Advisers, LLC	24,243	$127.8K	0.00%
CIBC Bancorp USA Inc.	23,500	$123.8K	0.00%
Envestnet Asset Management Inc	21,863	$115.2K	0.00%
FNY Investment Advisers, LLC	20,000	$105.0K	0.05%
Schonfeld Strategic Advisors LLC	15,900	$83.8K	0.00%
Y-Intercept (Hong Kong) Ltd	14,280	$75.3K	0.00%
Catalyst Funds Management Pty Ltd	12,800	$67.5K	0.01%
Cetera Investment Advisers	12,649	$66.7K	0.00%
Jump Financial, LLC	12,250	$64.6K	0.00%
Atria Investments LLC	10,758	$56.7K	0.00%
Levin Capital Strategies, L.P.	10,000	$52.7K	0.00%
Group One Trading, L.P.	3,029	$16.0K	0.00%
Quantbot Technologies LP	1,632	$8.60K	0.00%
Natixis	380	$2.00K	0.00%
Royal Bank of Canada	360	$1.00K	0.00%
Fortitude Family Office, LLC	105	$553	0.00%

Sold out (16)

Institutions that held Immuneering Corp at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of IMRX in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Empery Asset Management, LP	2,674,950	$17.6M
Blue Owl Capital Holdings LP	665,000	$4.38M
Qube Research & Technologies Ltd	165,875	$1.09M
Woodline Partners LP	150,000	$987.0K
Rafferty Asset Management, LLC	130,742	$860.3K
Fox Run Management, L.L.C.	51,773	$340.7K
Profund Advisors LLC	47,135	$310.1K
Two Sigma Advisers, LP	31,800	$209.2K
EntryPoint Capital, LLC	31,237	$205.5K
Resonant Capital Advisors, LLC	20,000	$131.6K
Lighthouse Investment Partners, LLC	17,760	$116.9K
SummitTX Capital, L.P.	10,469	$68.9K
Mercer Global Advisors Inc	10,000	$65.8K
Vontobel Holding Ltd.	10,000	$65.7K
Mirae Asset Global ETFs Holdings Ltd.	7,627	$51.3K
Flagship Harbor Advisors, LLC	1,500	$9.87K

Not filed for Q1 2026 yet (3)

Institutions that held Immuneering Corp at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding IMRX in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	2,568,293	$16.9M
Southport Management, L.L.C.	277,501	$1.83M
CIBC Private Wealth Group, LLC	28,500	$187.5K