Keros Therapeutics Ownership | Who Owns Keros Therapeutics?

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Keros Therapeutics Ownership Summary

Keros Therapeutics is owned by 84.60% institutional investors, 3.63% insiders, and 11.77% retail investors. Adar1 capital management is the largest institutional shareholder, holding 13.27% of KROS shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.63% of its assets in Keros Therapeutics shares.

KROS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Keros Therapeutics	84.60%	3.63%	11.77%
Sector	Healthcare Stocks	42.54%	10.83%	46.63%
Industry	Biotech Stocks	45.22%	10.75%	44.04%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Adar1 capital management	5.39M	13.27%	$85.26M
Blackrock	2.51M	8.53%	$114.86M
Vanguard group	2.72M	6.69%	$43.01M
Blackrock funding, inc. /de	2.72M	6.69%	$42.99M
Madison avenue partners, lp	2.71M	6.67%	$42.84M
Western standard	2.19M	5.39%	$34.64M
Tang capital management	1.42M	3.49%	$22.45M
Goldman sachs group	1.33M	3.26%	$20.97M
State street	1.30M	3.21%	$20.61M
Nantahala capital management	1.23M	3.04%	$19.51M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Western standard	2.19M	10.28%	$34.64M
Adar1 capital management	5.39M	8.01%	$85.26M
Rangeley capital	258.62K	3.54%	$4.09M
Madison avenue partners, lp	2.71M	2.56%	$42.84M
Superstring capital management lp	95.08K	1.48%	$1.50M
Logos global management lp	850.00K	1.21%	$13.45M
Monimus capital management, lp	108.05K	1.05%	$1.71M
Tang capital management	1.42M	0.86%	$22.45M
Redmile group	552.51K	0.85%	$8.74M
Nantahala capital management	1.23M	0.68%	$19.51M

Top Buyers

Holder	Shares	% Assets	Change
Western standard	2.19M	10.28%	654.99K
Goldman sachs group	1.33M	0.00%	441.92K
Blackrock	2.51M	0.00%	347.23K
Millennium management	878.16K	0.01%	305.17K
Qube research	303.12K	0.01%	264.44K

Top Sellers

Holder	Shares	% Assets	Change
Braidwell lp	-	-	-1.89M
Darwin global management	-	-	-1.69M
Holocene advisors, lp	-	-	-1.20M
Logos global management lp	850.00K	1.21%	-1.15M
Jefferies financial group	-	-	-866.74K

New Positions

Holder	Shares	% Assets	Change	Value
Superstring capital management lp	95.08K	1.48%	95.08K	$1.50M
Norges bank	64.90K	0.00%	64.90K	$1.03M
American century companies	39.17K	0.00%	39.17K	$619.61K
Panagora asset management	30.46K	0.00%	30.46K	$481.89K
Lazard asset management	21.85K	0.00%	21.85K	$291.00K

Sold Out

Holder	Change
Ifp advisors	-1.00
Nelson, van denburg & campbell wealth management group	-4.00
Riggs asset managment	-5.00
Point72 asset management	-6.00
J.safra asset management	-8.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	153	12.50%	34,356,950	4.91%	84	1.30%	80	1.27%	39	18.18%
Jun 30, 2025	143	-13.86%	35,921,666	4.01%	88	1.22%	82	-14.58%	35	-7.89%
Mar 31, 2025	169	-2.87%	36,741,515	-0.02%	90	0.87%	98	-14.04%	38	22.58%
Dec 31, 2024	168	-1.75%	35,057,503	0.30%	97	1.04%	110	14.58%	30	-34.78%
Sep 30, 2024	170	11.11%	34,920,843	11.04%	96	1.27%	96	11.63%	46	15.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	1.07M	2.63%	-23.70K
Vanguard US Total Market Shares ETF	960.39K	2.37%	1.20K
iShares Russell 2000 ETF	825.23K	2.03%	-
Fidelity Select Health Care	820.00K	2.02%	20.00K
SPDR® S&P Biotech ETF	661.47K	1.63%	1.48K
Fidelity Advisor Health Care I	500.00K	1.23%	15.00K
Fidelity Small Cap Growth	467.94K	1.15%	91.10K
Strategic Advisers Fidelity US TtlStk	459.90K	1.14%	47.33K
Vanguard Explorer Inv	454.00K	1.12%	85.46K
Federated Hermes MDT SCC Institutional	450.87K	1.11%	-315.89K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 15, 2025	Pontifax Management 4 G.P. (2015) Ltd.	-	Sell	$2.76M
Oct 15, 2025	ADAR1 Capital Management, LLC	-	Sell	$13.19M
Apr 09, 2025	ADAR1 Capital Management, LLC	-	Buy	$767.86K
Apr 09, 2025	ADAR1 Capital Management, LLC	-	Buy	$5.17M
Apr 09, 2025	ADAR1 Capital Management, LLC	-	Buy	$3.20M

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	2
2025 Q3	-	-
2025 Q2	5	-
2025 Q1	-	-
2024 Q4	-	-

KROS Ownership FAQ

Who Owns Keros Therapeutics?

Keros Therapeutics shareholders are primarily institutional investors at 84.60%, followed by 3.63% insiders and 11.77% retail investors. The average institutional ownership in Keros Therapeutics's industry, Biotech Stocks , is 45.22%, which Keros Therapeutics exceeds.

Who owns the most shares of Keros Therapeutics?

Keros Therapeutics’s largest shareholders are Adar1 capital management (5.39M shares, 13.27%), Blackrock (2.51M shares, 8.53%), and Vanguard group (2.72M shares, 6.69%). Together, they hold 28.50% of Keros Therapeutics’s total shares outstanding.

Does Blackrock own Keros Therapeutics?

Yes, BlackRock owns 8.53% of Keros Therapeutics, totaling 2.51M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 114.86M$. In the last quarter, BlackRock increased its holdings by 347.23K shares, a 16.03% change.

Who is Keros Therapeutics’s biggest shareholder by percentage of total assets invested?

Western standard is Keros Therapeutics’s biggest shareholder by percentage of total assets invested, with 10.28% of its assets in 2.19M Keros Therapeutics shares, valued at 34.64M$.

Who is the top mutual fund holder of Keros Therapeutics shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Keros Therapeutics shares, with 2.63% of its total shares outstanding invested in 1.07M Keros Therapeutics shares.

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