OSR Ownership | Who Owns OSR?

OSR Ownership Summary

OSR is owned by 6.54% institutional investors, 45.84% insiders, and 47.62% retail investors. Fidelity Extended Market Index is the top mutual fund, with 0.26% of its assets in OSR shares.

OSRH Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	OSR	6.54%	45.84%	47.62%
Sector	Healthcare Stocks	35.80%	11.87%	52.33%
Industry	Biotech Stocks	36.05%	11.82%	52.13%

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	11	-	292,904	69.27%	6	43.84%	8	33.33%	2	-
Dec 31, 2025	11	37.50%	173,040	-23.14%	3	15.30%	6	-	2	-
Sep 30, 2025	8	-	225,125	156.09%	5	130.56%	6	20.00%	-	-100.00%
Jun 30, 2025	8	-	87,910	39.74%	1	99.56%	5	-37.50%	1	-
Mar 31, 2025	8	-	62,911	-	1	-	8	-	-	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Extended Market Index	89.73K	0.26%	-328.00
Vanguard Institutional Extnd Mkt Idx Tr	37.37K	0.11%	-
Fidelity Series Total Market Index	6.77K	0.02%	-
Spartan Total Market Index Pool G	4.35K	0.01%	-
Fidelity Nasdaq Composite Index	4.32K	0.01%	-
GAMCO Intl SICAV Merger Arbtrg I (USD)	2.67K	0.01%	-31.00
Spartan Extended Market Index Pool F	580.00	0.00%	328.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 14, 2023	Bellevue Global Life Science Investors LLC	-	Buy	$4.95M
Feb 14, 2023	Hwang Kuk Hyoun	Chief Executive Officer	Buy	$4.95M

Insider Transactions Trends

Date	Buy	Sell
2023 Q1	2	-

OSRH Ownership FAQ

Who Owns OSR?

OSR shareholders are primarily institutional investors at 6.54%, followed by 45.84% insiders and 47.62% retail investors. The average institutional ownership in OSR's industry, Biotech Stocks , is 36.05%, which OSR falls below.

Does Blackrock own OSR?

BlackRock is not among the top 10 institutional shareholders of OSR.

Who is the top mutual fund holder of OSR shares?

Fidelity Extended Market Index is the top mutual fund holder of OSR shares, with 0.26% of its total shares outstanding invested in 89.73K OSR shares.

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