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Keros Therapeutics, Inc.

KROS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001664710

In the last 90 days, Keros Therapeutics, Inc. insiders filed 2 open-market purchases and 4 sales; 132 institutions reported holding it in 13F filings for Q2 2026, worth $198.6M in total; no superinvestor holds it.

Holders of 5% or more of KROS

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

Holders of 5% or more of KROS
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A8.40%1.67M shares−1.70 ppfrom 10.10%Apr 7, 20262 filingsJul 29, 2026SEC
Nantahala Capital Management, LLC13G6.90%1.36M sharesNewMay 15, 20261 filingMay 15, 2026SEC
BlackRock Portfolio Management LLC13G5.70%1.12M sharesNewJul 17, 20261 filingJul 17, 2026SEC

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

45 Schedule 13D and 13G filings on Keros Therapeutics, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on KROS
Filed (ET)FilerFormStakeChangeEvent dateFiling
Jul 29, 20263:19 PM ETBlackRock, Inc.13G/A8.40%1.67M shares−1.70 ppfrom 10.10%Jun 30, 2026SEC
Jul 17, 202611:33 AM ETBlackRock Portfolio Management LLC13G5.70%1.12M sharesNewJun 30, 2026SEC
May 15, 20264:41 PM ETNantahala Capital Management, LLCand 2 others13G6.90%1.36M sharesNewMar 31, 2026SEC
Apr 7, 202612:39 PM ETBlackRock, Inc.13G10.10%1.99M sharesNewMar 31, 2026SEC
Mar 27, 202610:16 AM ETVanguard Group Inc13G/A0.00%0 shares−5.00 ppfrom 5.00%Below 5%Mar 13, 2026SEC
Feb 17, 20265:17 PM ETExodusPoint Capital Management, LPand 2 others13G/A0.04%13.4K shares−6.26 ppfrom 6.30%Below 5%Dec 31, 2025SEC
Feb 17, 20264:52 PM ETMadison Avenue Partners, LPand 5 others13G/A2.70%823.7K shares−3.70 ppfrom 6.40%Below 5%Dec 31, 2025SEC
Feb 17, 20264:15 PM ETTang Capital Management LLCand 5 others13G/A0.00%0 shares−7.90 ppfrom 7.90%Below 5%Dec 31, 2025SEC
Feb 17, 20264:05 PM ETD. E. Shaw & Co, L.P.and 2 others13G/A3.90%756.2K shares−1.20 ppfrom 5.10%Below 5%Dec 31, 2025SEC
Jan 30, 20262:17 PM ETVanguard Group Inc13G/A5.00%1.53M shares−1.32 ppfrom 6.32%Dec 31, 2025SEC
Nov 18, 20254:07 PM ETExodusPoint Capital Management, LPand 2 others13G6.30%1.91M sharesNewNov 10, 2025SEC
Oct 27, 20254:05 PM ETD. E. Shaw & Co, L.P.and 2 others13G5.10%1.55M sharesNewOct 20, 2025SEC
Oct 22, 20259:26 PM ETTang Capital Management LLCand 5 others13G7.90%2.42M sharesNewOct 15, 2025SEC
Oct 16, 20255:36 PM ETPontifax Management 4 G.P. (2015) Ltd.and 5 others13D/A0.00%0 shares−11.80 ppfrom 11.80%Below 5%Oct 15, 2025SEC
Oct 15, 20256:50 AM ETADAR1 Capital Management, LLCand 2 others13D/A0.00%0 shares−13.27 ppfrom 13.27%Below 5%Oct 15, 2025SEC
Aug 21, 20254:15 PM ETADAR1 Capital Management, LLCand 2 others13D/A13.27%5.39M shares0.00 ppfrom 13.27%Aug 21, 2025SEC
May 14, 20255:49 PM ETMadison Avenue Partners, LPand 5 others13G6.40%2.61M sharesNewMay 7, 2025SEC
May 12, 202511:29 AM ETADAR1 Capital Management, LLCand 2 others13D/A13.27%5.39M shares0.00 ppfrom 13.27%May 12, 2025SEC
May 8, 20254:39 PM ETADAR1 Capital Management, LLCand 2 others13D/A13.27%5.39M shares−0.02 ppfrom 13.29%May 8, 2025SEC
May 5, 20252:03 PM ETJPMorgan Chase & Co13G/A0.20%113.8K shares−6.10 ppfrom 6.30%Below 5%Apr 30, 2025SEC
May 2, 20259:59 AM ETJPMorgan Chase & Co13G6.30%2.59M sharesNewMar 31, 2025SEC
Apr 30, 202511:23 AM ETVanguard Group Inc13G6.32%2.57M sharesNewMar 31, 2025SEC
Apr 28, 20256:43 PM ETADAR1 Capital Management, LLCand 2 others13D/A13.29%5.39M shares0.00 ppfrom 13.29%Apr 24, 2025SEC
Apr 18, 20255:10 PM ETPontifax Management 4 G.P. (2015) Ltd.and 5 others13D/A11.80%4.79M shares–Apr 17, 2025SEC
Apr 11, 20258:32 PM ETADAR1 Capital Management, LLCand 2 others13D13.29%5.39M sharesNewApr 4, 2025SEC
Feb 14, 20254:12 PM ETAlkeon Capital Management LLCand 1 other13G2.70%1.10M shares–Below 5%Dec 31, 2024SEC
Feb 7, 202510:23 AM ETFMR LLCand 1 other13G/A1.70%704.5K shares–Below 5%Jan 31, 2025SEC
Feb 14, 2023Deep Track Capital, LP13G/AOld format–––SEC
Feb 13, 2023Alkeon Capital Management LLC13G/AOld format–––SEC
Feb 9, 2023FMR LLC13G/AOld format–––SEC
Feb 2, 2023Arkin Moshe13G/AOld format–––SEC
Nov 7, 2022OrbiMed Advisors LLC13D/AOld format–––SEC
Apr 12, 2022Arkin Moshe13G/AOld format–––SEC
Apr 11, 2022Arkin Moshe13GOld format–New–SEC
Feb 14, 2022Deep Track Capital, LP13G/AOld format–––SEC
Feb 11, 2022Foresite Capital Fund IV, L.P.13G/AOld format–––SEC
Feb 9, 2022FMR LLC13G/AOld format–––SEC
Feb 3, 20224:29 PM ETBlackRock Inc.13G/AOld format–––SEC
Dec 30, 2021Deep Track Capital, LP13GOld format–New–SEC
Feb 16, 2021Foresite Capital Fund IV, L.P.13G/AOld format–––SEC
Feb 16, 2021Logos Global Master Fund LP13G/AOld format–––SEC
Feb 10, 2021Ra Capital Management, L.P.13G/AOld format–––SEC
Feb 10, 2021Ra Capital Management, L.P.13GOld format–New–SEC
Feb 8, 2021FMR LLC13G/AOld format–––SEC
Feb 2, 20213:13 PM ETBlackRock Inc.13GOld format–New–SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Keros Therapeutics, Inc. shares.

No Form 144 notices for Keros Therapeutics, Inc. are on file.