OSI Systems Ownership | Who Owns OSI Systems?

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OSI Systems Ownership Summary

OSI Systems is owned by 115.89% institutional investors, 4.71% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 15.49% of OSIS shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.72% of its assets in OSI Systems shares.

OSIS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	OSI Systems	115.89%	4.71%	-20.60%
Sector	Technology Stocks	78.07%	14.90%	7.03%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	2.55M	15.49%	$558.13M
Blackrock	2.61M	15.31%	$358.80M
Vanguard group	2.11M	12.58%	$537.31M
Fmr	1.74M	10.55%	$380.14M
Janus henderson group	772.31K	4.61%	$205.06M
Vanguard capital management	703.07K	4.27%	$153.76M
State street	674.05K	4.09%	$147.42M
Capital investors	596.33K	3.62%	$130.42M
Geode capital management	463.79K	2.82%	$101.45M
Ubs asset management americas	452.55K	2.75%	$98.97M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Prospect capital advisors	57.64K	5.72%	$12.61M
Neumeier poma investment counsel	222.51K	3.33%	$48.66M
Manatuck hill partners	33.30K	2.41%	$7.28M
Millrace asset group	16.34K	2.18%	$2.25M
Channing capital management	432.85K	2.18%	$94.66M
Bridge city capital	33.32K	1.66%	$7.29M
Thematics asset management	106.41K	1.20%	$26.52M
Cascade investment advisors	9.26K	1.11%	$2.03M
Systematic financial management lp	216.10K	0.94%	$47.26M
Intrinsic edge capital management	32.96K	0.75%	$7.21M

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	298.48K	0.02%	254.87K
William blair investment management	379.35K	0.25%	207.68K
Sixth street partners management company	193.80K	0.01%	193.80K
American century companies	223.14K	0.02%	172.15K
Channing capital management	432.85K	2.18%	165.97K

Top Sellers

Holder	Shares	% Assets	Change
Mawer investment management	-	-	-662.63K
Fmr	1.74M	0.02%	-228.92K
Macquarie group	-	-	-209.22K
Loomis sayles & co l p	22.77K	0.01%	-168.69K
Bank of america corp /de/	137.34K	0.00%	-129.03K

New Positions

Holder	Shares	% Assets	Change	Value
Sixth street partners management company	193.80K	0.01%	193.80K	$42.38M
T. rowe price investment management	101.62K	0.01%	101.62K	$22.22M
Divisadero street capital management, lp	27.86K	0.14%	27.86K	$6.09M
Xtx topco	22.71K	0.06%	22.71K	$4.97M
Weiss asset management lp	18.58K	0.04%	18.58K	$4.06M

Sold Out

Holder	Change
Td capital management	-1.00
Vermillion wealth management	-1.00
Mendota financial group	-1.00
Claris advisors, llc / mo /	-1.00
Retirement wealth solutions	-1.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	366	-3.68%	19,091,774	1.27%	115	0.91%	190	7.95%	132	-8.33%
Mar 31, 2026	367	1.38%	18,471,170	-1.80%	110	0.87%	169	-14.21%	141	33.02%
Dec 31, 2025	203	-43.30%	9,943,358	-46.81%	59	0.52%	113	-33.14%	56	-58.21%
Sep 30, 2025	188	-44.87%	9,022,213	-50.45%	51	0.46%	87	-48.82%	70	-43.55%
Jun 30, 2025	349	7.38%	18,661,273	-4.05%	109	0.84%	173	13.07%	124	6.90%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	943.64K	5.72%	568.00
American Funds SMALLCAP World A	580.14K	3.52%	-39.34K
Janus Henderson US SMID Cap Growth MA	559.48K	3.33%	559.45K
Vanguard MStar Total Stk Mkt Idx Invest	498.36K	3.13%	1.77K
Vanguard US Total Market Shares ETF	525.36K	3.13%	572.00
Vanguard Morn Total Stk Mkt Idx Investor	496.59K	3.01%	-3.86K
Vanguard Total Stock Mkt Idx Inv	496.59K	3.01%	-3.86K
Janus Henderson Triton D	412.31K	2.59%	-
Vanguard Information Technology ETF	401.38K	2.52%	1.62K
Janus Henderson US SMID Cap Growth	412.31K	2.50%	60.28K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 04, 2026	CHOPRA DEEPAK	-	Sell	$5.64M
Feb 02, 2026	CHOPRA DEEPAK	-	Sell	$5.02M
Nov 10, 2025	CHOPRA DEEPAK	EXECUTIVE CHAIRMAN	Sell	$5.71M
Nov 07, 2025	Morben Paul Keith	PRES., OPTOELECTRONICS DIV	Sell	$116.11K
Nov 07, 2025	HAWKINS JAMES B	-	Sell	$424.73K

Insider Transactions Trends

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

OSIS Ownership FAQ

Who owns the most shares of OSI Systems?

OSI Systems’s largest shareholders are Blackrock funding, inc. /de (2.55M shares, 15.49%), Blackrock (2.61M shares, 15.31%), and Vanguard group (2.11M shares, 12.58%). Together, they hold 43.39% of OSI Systems’s total shares outstanding.

Does Blackrock own OSI Systems?

Yes, BlackRock owns 15.31% of OSI Systems, totaling 2.61M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 358.8M$. In the last quarter, BlackRock decreased its holdings by -46.216K shares, a -1.74% change.

Who is OSI Systems’s biggest shareholder by percentage of total assets invested?

Prospect capital advisors is OSI Systems’s biggest shareholder by percentage of total assets invested, with 5.72% of its assets in 57.64K OSI Systems shares, valued at 12.61M$.

Who is the top mutual fund holder of OSI Systems shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of OSI Systems shares, with 5.72% of its total shares outstanding invested in 943.64K OSI Systems shares.

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