IMRX · Immuneering Corp · Shareholders & Ownership

$3.81 +0.07 (+1.87%) At close · Oct 22

Russell 2000 member Rebalance outlook locked

Market Cap

$246.50M

64.70M

Volume · Oct 22 527.13K Avg daily vol (3M) 680.8K

Every disclosed holder of IMRX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns IMRX

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	116	34,506,820	53.34%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	4	14,025,272	21.68%	Yes
Remaining	—	16,165,310	24.99%	Rest
Registered funds (N-PORT, not summed)	83	14,207,798	21.96%	No

Shares outstanding: 64,697,402, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of IMRX

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	9,704,610	15.00%	+6,672	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	Fidelity Growth Company Fund Fund S000007119 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	2,943,677	4.55%	+97,990	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
1.2	Select Biotechnology Portfolio Fund S000007486 · Registered fund · May 31, 2026 Fidelity Select Portfolios, not summed	1,095,798	1.69%	-194,900	May 31, 2026	Fidelity Select Portfolios, not summed
1.3	Fidelity Growth Company K6 Fund Fund S000065696 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	828,054	1.28%	+16,009	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
1.4	Fidelity Series Growth Company Fund Fund S000042626 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	719,805	1.11%	-39,100	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
1.5	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	584,479	0.90%	—	Jul 31, 2026	Fidelity Salem Street Trust, not summed
2	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	4,374,020	6.76%	+2,866,762	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	4,356,235	6.73%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,364,794	2.11%	—	Jun 30, 2026	iShares Trust, not summed
2.3	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	496,639	0.77%	—	Jun 30, 2026	iShares Trust, not summed
2.4	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	387,578	0.60%	-2,430	Jun 30, 2026	iShares Trust, not summed
2.5	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	180,332	0.28%	+47,691	Jun 30, 2026	iShares Trust, not summed
3	HBM Healthcare Investments (Cayman) Ltd. 13G CIK 1232258 · Unknown · Sep 26, 2025 Rule 13d-1(c), passive investor	3,646,304	5.64%	—	Sep 26, 2025	Rule 13d-1(c), passive investor
4	Empery Asset Management, LP 13G CIK 1469336 · Registered investment adviser · Dec 31, 2025 Rule 13d-1(b), qualified institution	3,250,775	5.02%	-1,937,980	Dec 31, 2025	Rule 13d-1(b), qualified institution
5	Zeskind Benjamin J. Insider CIK 1870062 · Jun 23, 2026 Director, PRESIDENT AND CEO, issuer-wide, not summed	3,210,179	4.96%	+2,400	Jun 23, 2026	Director, PRESIDENT AND CEO, issuer-wide, not summed
5.1	BENJAMIN J. ZESKIND 13G CIK 1870062 · Unknown · Dec 31, 2025 Rule 13d-1(d), exempt investor	4,357,807	6.74%	+379,639	Dec 31, 2025	Rule 13d-1(d), exempt investor
6	Merrin Investors LLC 13G CIK 1877742 · Unknown · Mar 14, 2024 Rule 13d-1(c), passive investor	2,770,386	4.28%	—	Mar 14, 2024	Rule 13d-1(c), passive investor
7	Sanofi 13F CIK 1121404 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,708,559	4.19%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,286,434	3.53%	-1,907	Jun 30, 2026	carried, not yet filed for the newest quarter
9	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,936,076	2.99%	+106,888	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	T. Rowe Price New Horizons Fund, Inc. Fund S000002106 · Registered fund · Jun 30, 2026 T. ROWE PRICE NEW HORIZONS FUND, INC., not summed	906,762	1.40%	+215,290	Jun 30, 2026	T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
9.2	T. Rowe Price Health Sciences Fund, Inc. Fund S000002088 · Registered fund · Jun 30, 2026 T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed	387,692	0.60%	-236,334	Jun 30, 2026	T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
9.3	T. Rowe Price Health Sciences Portfolio Fund S000002083 · Registered fund · Jun 30, 2026 T. ROWE PRICE EQUITY SERIES, INC., not summed	35,835	0.06%	-16,019	Jun 30, 2026	T. ROWE PRICE EQUITY SERIES, INC., not summed
9.4	T. Rowe Price Small-Cap Index Fund Fund S000051327 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	8,084	0.01%	—	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed
10	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,623,577	2.51%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
11	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,370,750	2.12%	+732,806	Jun 30, 2026	carried, not yet filed for the newest quarter
12	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,001,995	1.55%	+733,475	Jun 30, 2026	carried, not yet filed for the newest quarter
12.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	11,700	0.02%	—	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
12.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,353	0.00%	—	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
12.3	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	372	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
13	DCF Advisers, LLC 13F CIK 1802493 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	790,000	1.22%	+648,538	Jun 30, 2026	carried, not yet filed for the newest quarter
14	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	731,897	1.13%	-1,264,688	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Feinberg Peter Insider CIK 1870076 · Jan 12, 2026 Director, issuer-wide, not summed	633,381	0.98%	—	Jan 12, 2026	Director, issuer-wide, not summed
16	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	612,343	0.95%	-1,907	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
17	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	601,255	0.93%	+200,892	Jun 30, 2026	carried, not yet filed for the newest quarter
18	ALETHEA CAPITAL MANAGEMENT, LLC 13F CIK 1549408 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	472,935	0.73%	+450,000	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Summit Financial, LLC 13F CIK 1765536 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	452,264	0.70%	+75,515	Jun 30, 2026	carried, not yet filed for the newest quarter
20	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	448,857	0.69%	+72,573	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	438,362	0.68%	+438,362	Jun 30, 2026	carried, not yet filed for the newest quarter
21.1	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	330,397	0.51%	—	Jul 31, 2026	TIAA-CREF Funds, not summed
21.2	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	71,445	0.11%	—	Jul 31, 2026	TIAA-CREF Funds, not summed
21.3	College Retirement Equities Fund - Total Global Stock Account Fund S000005080 · Registered fund · Jun 30, 2026 College Retirement Equities Fund, not summed	18,260	0.03%	—	Jun 30, 2026	College Retirement Equities Fund, not summed
22	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	436,992	0.68%	+319,326	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	27,783	0.04%	—	Jun 30, 2026	Northern Funds, not summed
23	LEVIN CAPITAL STRATEGIES, L.P. 13F CIK 1354821 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	414,000	0.64%	+404,000	Jun 30, 2026	carried, not yet filed for the newest quarter
24	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	386,411	0.60%	-60,867	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Hall Brett Matthew Insider CIK 1870437 · Jun 15, 2026 CHIEF SCIENTIFIC OFFICER, issuer-wide, not summed	382,531	0.59%	+6,035	Jun 15, 2026	CHIEF SCIENTIFIC OFFICER, issuer-wide, not summed
26	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	360,764	0.56%	+38,726	Jun 30, 2026	carried, not yet filed for the newest quarter
27	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	359,085	0.56%	+359,085	Jun 30, 2026	carried, not yet filed for the newest quarter
28	GSA CAPITAL PARTNERS LLP 13F CIK 1362033 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	343,303	0.53%	+266,551	Jun 30, 2026	carried, not yet filed for the newest quarter
29	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	330,402	0.51%	-772,310	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Burkehill Global Management, LP 13F CIK 1904549 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	300,000	0.46%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	288,420	0.45%	+43,649	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Occam Crest Management LP 13F CIK 2085909 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	278,498	0.43%	-266,600	Jun 30, 2026	carried, not yet filed for the newest quarter
33	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	226,491	0.35%	-69,576	Jun 30, 2026	carried, not yet filed for the newest quarter
34	Gengos Andrew Insider CIK 1563623 · Jul 16, 2026 Director, issuer-wide, not summed	225,000	0.35%	—	Jul 16, 2026	Director, issuer-wide, not summed
35	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	203,663	0.31%	+203,663	Jun 30, 2026	carried, not yet filed for the newest quarter
36	PVG ASSET MANAGEMENT CORP 13F CIK 820434 · Registered investment adviser · Sep 30, 2026	185,913	0.29%	+39,462	Sep 30, 2026
37	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	167,901	0.26%	+130,557	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	130,557	0.20%	—	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
37.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	37,344	0.06%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
38	Permanent Capital Management, LP 13F CIK 2054108 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	150,000	0.23%	+150,000	Jun 30, 2026	carried, not yet filed for the newest quarter
39	HighTower Advisors, LLC 13F CIK 1462245 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	143,486	0.22%	+12,200	Jun 30, 2026	carried, not yet filed for the newest quarter
40	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	132,004	0.20%	+132,004	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Kingsview Wealth Management, LLC 13F CIK 1791965 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	123,000	0.19%	+800	Jun 30, 2026	carried, not yet filed for the newest quarter
42	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	115,845	0.18%	-35,002	Jun 30, 2026	carried, not yet filed for the newest quarter
43	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	108,149	0.17%	-10,000	Jun 30, 2026	carried, not yet filed for the newest quarter
43.1	Ultra-Small Company Fund Fund S000004423 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	50,000	0.08%	-10,000	Jun 30, 2026	Bridgeway Funds, Inc., not summed
43.2	Ultra-Small Company Market Fund Fund S000004424 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	49,849	0.08%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
44	ENVESTNET ASSET MANAGEMENT INC 13F CIK 1407543 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	105,809	0.16%	+83,946	Jun 30, 2026	carried, not yet filed for the newest quarter
45	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	96,220	0.15%	-231,435	Jun 30, 2026	carried, not yet filed for the newest quarter
45.1	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	45,991	0.07%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
46	Fisher Asset Management, LLC 13F CIK 850529 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	88,333	0.14%	+88,333	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Corient Private Wealth LLC 13F CIK 1948780 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	77,090	0.12%	+77,090	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Large-Cap Growth Portfolio Fund S000026003 · Registered fund · Jun 30, 2026 PACIFIC SELECT FUND, not summed	76,219	0.12%	0	Jun 30, 2026	PACIFIC SELECT FUND, not summed
49	Schall Thomas J. Insider CIK 1423084 · Jan 15, 2026 Director, issuer-wide, not summed	74,530	0.12%	+21,645	Jan 15, 2026	Director, issuer-wide, not summed
50	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	71,454	0.11%	+71,454	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	Columbia Research Enhanced Small Cap ETF Fund S000095313 · Registered fund · Jun 30, 2026 Columbia ETF Trust I, not summed	65	0.00%	—	Jun 30, 2026	Columbia ETF Trust I, not summed

8 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 174 holders

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Key facts CIK 1790340 CUSIP 45254E107 13F (30d) 14 filings 14 filers Visit website Investor relations