Keros Therapeutics Ownership | Who Owns Keros Therapeutics?

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Keros Therapeutics Ownership Summary

Keros Therapeutics is owned by 13.45% institutional investors, 3.64% insiders, and 82.91% retail investors. Adar1 capital management is the largest institutional shareholder, holding 13.27% of KROS shares. iShares Russell 2000 ETF is the top mutual fund, with 3.48% of its assets in Keros Therapeutics shares.

KROS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Keros Therapeutics	13.45%	3.64%	82.91%
Sector	Healthcare Stocks	35.74%	11.83%	52.43%
Industry	Biotech Stocks	36.05%	11.82%	52.13%

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
Blackrock funding, inc. /de	2.41M	6.48%	$26.63M
Vanguard group	1.53M	3.75%	$31.06M
Nantahala capital management	1.36M	3.65%	$15.02M
Tang capital management	1.42M	3.49%	$22.45M
Alkeon capital management	850.51K	2.09%	$13.46M
Logos global management lp	850.00K	2.09%	$13.45M
Orbimed advisors	759.15K	2.04%	$8.38M
Qube research	724.93K	1.95%	$8.00M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Adar1 capital management	5.39M	8.01%	$85.26M
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
Rangeley capital	54.40K	0.58%	$600.58K
Nantahala capital management	1.36M	0.55%	$15.02M
Highvista strategies	83.05K	0.32%	$1.31M
Dafna capital management	80.72K	0.32%	$1.28M

Top Buyers

Holder	Shares	% Assets	Change
Nantahala capital management	1.36M	0.55%	1.00M
Blackrock	2.51M	0.00%	347.23K
Dimensional fund advisors lp	321.36K	0.00%	263.35K
Aqr capital management	406.56K	0.00%	226.02K
Nuveen	262.07K	0.00%	198.98K

Top Sellers

Holder	Shares	% Assets	Change
Western standard	-	-	-2.19M
Braidwell lp	-	-	-1.89M
Darwin global management	-	-	-1.69M
Holocene advisors, lp	-	-	-1.20M
Vanguard group	1.53M	0.00%	-1.19M

New Positions

Holder	Shares	% Assets	Change	Value
Vanguard fiduciary trust	127.30K	0.00%	127.30K	$1.41M
Superstring capital management lp	95.08K	1.48%	95.08K	$1.50M
Acadian asset management	65.44K	0.00%	65.44K	$721.00K
Norges bank	64.90K	0.00%	64.90K	$1.03M
Principal financial group	59.59K	0.00%	59.59K	$657.92K

Sold Out

Holder	Change
Quantbot technologies lp	-1.00
Clearstead advisors	-3.00
Nelson, van denburg & campbell wealth management group	-4.00
Riggs asset managment	-5.00
J.safra asset management	-8.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	67	-60.59%	5,007,517	-75.13%	13	0.55%	36	-55.56%	17	-75.71%
Dec 31, 2025	102	-36.65%	10,764,752	-69.51%	26	0.35%	46	-45.88%	41	2.50%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Russell 2000 ETF	688.78K	3.48%	5.83K
Vanguard Total Stock Mkt Idx Inv	595.32K	3.01%	-
State Street® SPDR® S&P® Biotech ETF	504.06K	2.56%	2.80K
Vanguard US Total Market Shares ETF	960.39K	2.37%	1.20K
Fidelity Select Health Care	820.00K	2.02%	20.00K
Federated Hermes MDT SCC Institutional	382.34K	1.93%	17.90K
Federated Hermes MDT Small Cap Core IS	382.34K	1.93%	17.90K
SPDR® S&P Biotech ETF	661.47K	1.63%	1.48K
Fidelity Small Cap Index	286.13K	1.45%	3.18K
ACAP Strategic A	419.59K	1.38%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 15, 2026	BIENAIME JEAN JACQUES	-	Buy	$10.19K
Jun 11, 2026	Newton Charles W.	-	Sell	$5.52K
Jun 04, 2026	Farzan Nima	-	Sell	$28.17K
Jun 04, 2026	Knowles Julius	-	Sell	$28.17K
Jun 04, 2026	Seth Alpna	-	Sell	$28.14K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	3	4
2026 Q1	1	4
2025 Q4	-	2
2025 Q3	-	-
2025 Q2	5	-

KROS Ownership FAQ

Who Owns Keros Therapeutics?

Keros Therapeutics shareholders are primarily institutional investors at 13.45%, followed by 3.64% insiders and 82.91% retail investors. The average institutional ownership in Keros Therapeutics's industry, Biotech Stocks , is 36.05%, which Keros Therapeutics falls below.

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 Blackrock funding, inc. /de (2.41M shares, 6.48%). Together, they hold 28.28% 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?

Adar1 capital management is Keros Therapeutics’s biggest shareholder by percentage of total assets invested, with 8.01% of its assets in 5.39M Keros Therapeutics shares, valued at 85.26M$.

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

iShares Russell 2000 ETF is the top mutual fund holder of Keros Therapeutics shares, with 3.48% of its total shares outstanding invested in 688.78K Keros Therapeutics shares.

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