Keros Therapeutics, Inc.

Historical 13F Holders

Symbol: KROS
CUSIP: 492327101
All holders as of: Q2 2026
Type: Equity
Class: COM

Reported Value, Excluding Options

Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 492327101 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
BlackRock, Inc. 13G/A Amendment 5	8.4%	1,671,343	13G/A Amendment 5	7/29/2026 Event 6/30/2026
BlackRock Portfolio Management LLC 13G	5.7%	1,122,874	13G	7/17/2026 Event 6/30/2026
Nantahala Capital Management, LLC 13G	6.9%	1,360,419	13G	5/15/2026 Event 3/31/2026
Nantahala Capital Management, LLC	6.9%	1,360,419
Wilmot B. Harkey	6.9%	1,360,419
Daniel Mack	6.9%	1,360,419
BlackRock, Inc. 13G	10.1%	1,990,842	13G	4/7/2026 Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 2	0%	0	13G/A Amendment 2	3/27/2026 Event 3/13/2026
Tang Capital Management LLC 13G/A Amendment 1	0%	0	13G/A Amendment 1	2/17/2026 Event 12/31/2025
Tang Capital Management, LLC	0%	0
Kevin Tang	0%	0
Tang Capital Partners, LP	0%	0
Tang Capital Partners International, LP	0%	0
Tang Capital Partners III, Inc	0%	0
Tang Capital Partners IV, Inc	0%	0
D. E. Shaw & Co., L.P. 13G/A Amendment 1	3.9%	756,156	13G/A Amendment 1	2/17/2026 Event 12/31/2025
D. E. Shaw & Co., L.P.	3.9%	756,156
D. E. Shaw & Co., L.L.C.	3.9%	755,473
David E. Shaw	3.9%	756,156
Madison Avenue Partners, LP 13G/A Amendment 1	2.7%	823,707	13G/A Amendment 1	2/17/2026 Event 12/31/2025
Madison Avenue International LP	2.7%	823,707
Madison Avenue Partners, LP	2.7%	823,707
EMAI Management, LLC	2.7%	823,707
Madison Avenue GP, LLC	2.7%	823,707
Caraway Jackson Investments LLC	2.7%	823,707
Eli Samaha	2.7%	823,707
ExodusPoint Capital Management, LP 13G/A Amendment 1	<0.1%	13,360	13G/A Amendment 1	2/17/2026 Event 12/31/2025
ExodusPoint Capital Management, LP	<0.1%	13,360
ExodusPoint Capital Partners GP, LLC	<0.1%	13,360
Michael Gelband	<0.1%	13,360
Vanguard Group Inc 13G/A Amendment 1	5.0%	1,525,355	13G/A Amendment 1	1/30/2026 Event 12/31/2025
ExodusPoint Capital Management, LP 13G	6.3%	1,907,899	13G	11/18/2025 Event 11/10/2025
ExodusPoint Capital Management, LP	6.3%	1,907,899
ExodusPoint Capital Partners GP, LLC	6.3%	1,907,899
Michael Gelband	6.3%	1,907,899
D. E. Shaw & Co., L.P. 13G	5.1%	1,545,948	13G	10/27/2025 Event 10/20/2025
D. E. Shaw & Co., L.P.	5.1%	1,545,948
D. E. Shaw & Co., L.L.C.	5.0%	1,537,348
David E. Shaw	5.1%	1,545,948
Tang Capital Management LLC 13G	7.9%	2,418,984	13G	10/22/2025 Event 10/15/2025
Tang Capital Management, LLC	7.9%	2,418,984
Kevin Tang	7.9%	2,418,984
Tang Capital Partners, LP	5.2%	1,579,237
Tang Capital Partners International, LP	2.7%	839,747
Tang Capital Partners III, Inc	0%	0
Tang Capital Partners IV, Inc	0%	0
Pontifax Management 4 G.P. (2015) Ltd. 13D/A Amendment 2	0%	0	13D/A Amendment 2	10/16/2025 Event 10/15/2025
Pontifax Management 4 GP (2015) Ltd.	0%	0
Pontifax (Israel) IV, L.P.	0%	0
Pontifax (Cayman) IV, L.P.	0%	0
Pontifax (China) IV, L.P.	0%	0
Pontifax Late Stage Fund L.P.	0%	0
Pontifax Late Stage GP Ltd.	0%	0
ADAR1 Capital Management, LLC 13D/A Amendment 5	0%	0	13D/A Amendment 5	10/15/2025 Event 10/15/2025
ADAR1 Capital Management, LLC	0%	0
ADAR1 Capital Management GP, LLC	0%	0
Daniel Schneeberger	0%	0
ADAR1 Capital Management, LLC 13D/A Amendment 4	13.3%	5,389,264	13D/A Amendment 4	8/21/2025 Event 8/21/2025
ADAR1 Capital Management, LLC	13.3%	5,389,264
ADAR1 Capital Management GP, LLC	11.4%	4,645,906
Daniel Schneeberger	13.3%	5,389,264
Madison Avenue Partners, LP 13G	6.4%	2,614,402	13G	5/14/2025 Event 5/7/2025
Madison Avenue Partners, LP	6.4%	2,614,402
Madison Avenue International LP	6.4%	2,614,402
EMAI Management, LLC	6.4%	2,614,402
Madison Avenue GP, LLC	6.4%	2,614,402
Caraway Jackson Investments LLC	6.4%	2,614,402
Eli Samaha	6.4%	2,614,402
ADAR1 Capital Management, LLC 13D/A Amendment 3	13.3%	5,390,964	13D/A Amendment 3	5/12/2025 Event 5/12/2025
ADAR1 Capital Management, LLC	13.3%	5,390,964
ADAR1 Capital Management GP, LLC	11.4%	4,647,406
Daniel Schneeberger	13.3%	5,390,964
ADAR1 Capital Management, LLC 13D/A Amendment 2	13.3%	5,390,964	13D/A Amendment 2	5/8/2025 Event 5/8/2025
ADAR1 Capital Management, LLC	13.3%	5,390,964
ADAR1 Capital Management GP, LLC	11.4%	4,647,406
Daniel Schneeberger	13.3%	5,390,964
JPMorgan Chase & Co 13G/A Amendment 1	0.2%	113,803	13G/A Amendment 1	5/5/2025 Event 4/30/2025
JPMorgan Chase & Co 13G	6.3%	2,587,146	13G	5/2/2025 Event 3/31/2025
Vanguard Group Inc 13G	6.3%	2,566,321	13G	4/30/2025 Event 3/31/2025
ADAR1 Capital Management, LLC 13D/A Amendment 1	13.3%	5,390,964	13D/A Amendment 1	4/28/2025 Event 4/24/2025
ADAR1 Capital Management, LLC	13.3%	5,390,964
ADAR1 Capital Management GP, LLC	11.5%	4,647,406
Daniel Schneeberger	13.3%	5,390,964
Pontifax Management 4 G.P. (2015) Ltd. 13D/A Amendment 1	11.8%	4,787,331	13D/A Amendment 1	4/18/2025 Event 4/17/2025
Pontifax Management 4 GP (2015) Ltd.	11.8%	4,787,331
Pontifax (Israel) IV, L.P.	5.6%	2,284,612
Pontifax (Cayman) IV, L.P.	2.8%	1,121,045
Pontifax (China) IV, L.P.	3.0%	1,226,412
Pontifax Late Stage Fund L.P.	0.4%	155,262
Pontifax Late Stage GP Ltd.	0.4%	155,262
ADAR1 Capital Management, LLC 13D	13.3%	5,390,964	13D	4/11/2025 Event 4/4/2025
ADAR1 Capital Management, LLC	13.3%	5,390,964
ADAR1 Capital Management GP, LLC	11.5%	4,647,406
Daniel Schneeberger	13.3%	5,390,964
Alkeon Capital Management LLC 13G	2.7%	1,101,000	13G	2/14/2025 Event 12/31/2024
Alkeon Capital Management LLC	2.7%	1,101,000
Panayotis D. Sparaggis	2.7%	1,101,000
FMR LLC 13G/A Amendment 5	1.7%	704,472	13G/A Amendment 5	2/7/2025 Event 1/31/2025
FMR LLC	1.7%	704,472
Abigail P. Johnson	1.7%	704,472

13F Holders by Quarter

Period	Filings	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q3	3	2.67 k	$30.4 k	$0
2026 Q2	136	20.0 M	$214 M	$154 k
2026 Q1	158	18.6 M	$206 M	$3.24 M
2025 Q4	176	20.2 M	$411 M	$14.2 M
2025 Q3	165	35.5 M	$561 M	$14.2 M
2025 Q2	151	37.2 M	$498 M	$24.1 M
2025 Q1	174	36.7 M	$429 M	$22.9 M
2024 Q4	177	36.8 M	$582 M	$21.2 M
2024 Q3	176	35.0 M	$2.03 B	$4.98 M
2024 Q2	161	32.2 M	$1.47 B	$1.39 M
2024 Q1	158	32.0 M	$2.12 B	$5.44 M
2023 Q4	131	27.3 M	$1.08 B	$1.05 M
2023 Q3	111	22.9 M	$730 M	$414 k
2023 Q2	129	22.4 M	$901 M	$538 k
2023 Q1	136	22.0 M	$937 M	$1.11 M
2022 Q4	134	20.8 M	$998 M	$3.21 M
2022 Q3	119	18.2 M	$683 M	$4.93 M
2022 Q2	107	17.4 M	$480 M	$1.64 M
2022 Q1	112	16.4 M	$893 M	$4.84 M
2021 Q4	106	16.2 M	$946 M	$8.37 M
2021 Q3	90	13.8 M	$545 M	$0
2021 Q2	81	14.1 M	$600 M	$0
2021 Q1	84	14.4 M	$887 M	$0
2020 Q4	83	16.0 M	$1.13 B	$0
2020 Q3	50	11.8 M	$455 M	$0
2020 Q2	52	10.9 M	$410 M	$0