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Immuneering Corp

IMRX
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001790340

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.

Holders of 5% or more of IMRX

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Immuneering Corp, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of IMRX
HolderLatest formStakeChangeFirst filedLatest filingFiling
FMR LLC13G14.50%8.79M sharesNewOct 7, 20251 filingOct 7, 2025SEC
BlackRock, Inc.13G6.70%4.36M sharesNewJul 28, 20261 filingJul 28, 2026SEC
Zeskind Benjamin J.13G/A6.60%4.36M shares−6.20 ppfrom 12.80%Feb 10, 20225 filingsJan 22, 2026SEC
HBM Healthcare Investments (Cayman) Ltd.13G5.70%3.65M sharesNewOct 3, 20251 filingOct 3, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

32 Schedule 13D and 13G filings on Immuneering Corp, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on IMRX
Filed (ET)FilerFormStakeChangeEvent dateFiling
Jul 28, 20264:44 PM ETBlackRock, Inc.13G6.70%4.36M sharesNewJun 30, 2026SEC
Jan 22, 20269:03 AM ETZeskind Benjamin J.13G/A6.60%4.36M shares−6.20 ppfrom 12.80%Dec 31, 2025SEC
Jan 15, 20261:23 PM ETEmpery Asset Management, LPand 1 other13G/A4.99%3.25M shares−3.84 ppfrom 8.83%Below 5%Dec 31, 2025SEC
Oct 21, 20259:02 AM ETEmpery Asset Management, LPand 2 others13G8.83%5.19M sharesNewSep 30, 2025SEC
Oct 7, 20253:49 PM ETFMR LLCand 1 other13G14.50%8.79M sharesNewSep 30, 2025SEC
Oct 3, 20254:15 PM ETHBM Healthcare Investments (Cayman) Ltd.13G5.70%3.65M sharesNewSep 26, 2025SEC
Jan 17, 20254:13 PM ETZeskind Benjamin J.13G/A12.80%3.98M shares–Dec 31, 2024SEC
Nov 14, 2024Cormorant Asset Management, LP13G/AOld format–––SEC
Nov 14, 2024Citadel Advisors LLC13G/AOld format–––SEC
Apr 15, 2024Cormorant Asset Management, LP13G/AOld format–––SEC
Apr 10, 2024Price T Rowe Associates Inc13G/AOld format–––SEC
Apr 5, 202412:21 PM ETBlackRock Inc.13G/AOld format–––SEC
Mar 27, 2024Merrin Investors LLC13G/AOld format–––SEC
Feb 14, 2024Citadel Advisors LLC13G/AOld format–––SEC
Feb 14, 2024Price T Rowe Associates Inc13G/AOld format–––SEC
Jan 26, 20244:23 PM ETBlackRock Inc.13GOld format–––SEC
Jan 16, 2024Zeskind Benjamin J.13G/AOld format–––SEC
May 5, 202311:52 AM ETBlackRock Inc.13G/AOld format–––SEC
Apr 24, 2023Cormorant Asset Management, LP13G/AOld format–––SEC
Feb 14, 2023Citadel Advisors LLC13G/AOld format–––SEC
Feb 14, 2023Cormorant Asset Management, LP13G/AOld format–––SEC
Feb 14, 2023Price T Rowe Associates Inc13G/AOld format–––SEC
Feb 8, 2023Zeskind Benjamin J.13G/AOld format–––SEC
Feb 1, 20234:54 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 14, 2022Citadel Advisors LLC13G/AOld format–––SEC
Feb 14, 2022Price T Rowe Associates Inc13G/AOld format–––SEC
Feb 10, 2022Zeskind Benjamin J.13GOld format–New–SEC
Feb 4, 20224:12 PM ETBlackRock Inc.13GOld format–New–SEC
Aug 13, 2021Citadel Advisors LLC13GOld format–New–SEC
Aug 13, 2021Cormorant Asset Management, LP13GOld format–New–SEC
Aug 11, 2021Merrin Investors LLC13GOld format–New–SEC
Aug 10, 2021Price T Rowe Associates Inc13GOld format–New–SEC

Form 144: proposed insider sales

1 notice from officers, directors and other affiliates planning to sell Immuneering Corp shares, newest first.

Form 144 notices for IMRX
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Sep 23, 20258:48 AM ETBerman Ann EDirector14.0K$136.1KSep 23, 2025Fidelity Brokerage Services LLCSEC