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OSIS Institutional Ownership & 13F Holders | SmartMoneyDB

OSISOSI SYSTEMS INC

COM · CUSIP 671044105

Smart Money Ownership

Of the 10 tracked institutions holding OSIS, 3 have a 3-year clone track record — 3 of them beat the S&P. Average holder's clone alpha: +3.4pt. It's a gauge of who owns the name, not just how many.

Israel Englander

$65.3M

+3.9pt

PRICE T ROWE ASSOCIATES INC /MD/

$68.8M

+3.5pt

Gotham Asset Management, LLC

$580.4K

+2.8pt

Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →

OSIS (OSI SYSTEMS INC) Institutional Ownership Summary

Among the 10 tracked institutional investors we monitor, OSIS (OSI SYSTEMS INC) is held with a combined value of $1.80B across 7,886,748 shares. The largest holder is BlackRock, Inc. with a position worth $558.13M. 6 funds increased their holdings. 4 funds reduced their position.

Total Institutional Value

$1.80B

Total Shares Held

7,886,748

Institutional Holders

% of Shares Outstanding

49.5%

of 15.94M shares · SEC 2026-08-17

Days to Cover

13.3-2.8%

2.03M shares short · FINRA 2026-08-14

Tracked 13F institutions hold 49.5% of OSIS's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-08-17), not a live float.

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

MILLENNIUM MANAGEMENT LLC+584% shares~$55.7M WELLINGTON MANAGEMENT GROUP LLP+89% shares~$18.3M PRICE T ROWE ASSOCIATES INC /MD/+21% shares~$12.1M BlackRock, Inc.+1% shares~$5.0M STATE STREET CORP+2% shares~$2.6M

13F Institutional Holders

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PRICE T ROWE ASSOCIATES INC /MD/

0.01% of book+21.3%

$68.83M

MILLENNIUM MANAGEMENT LLC

0.04% of book+584.4%

$65.28M

WELLINGTON MANAGEMENT GROUP LLP

0.01% of book+89.4%

$38.84M

AQR CAPITAL MANAGEMENT LLC

0.00% of book-8.2%

$3.84M

TWO SIGMA ADVISERS, LP

0.00% of book-67.5%

$1.25M

Gotham Asset Management, LLC

0.00% of book+0.3%

$580.43K

#	Fund	Value↓	Shares	Portfolio %	Change
1	BlackRock, Inc.	$558.13M	2,552,027	0.01%	+0.9%
2	VANGUARD GROUP INC	$537.31M	2,106,595	0.01%	-0.0%
3	FMR LLC	$380.14M	1,738,166	0.02%	-11.6%
4	STATE STREET CORP	$147.42M	674,053	0.00%	+1.8%
5	PRICE T ROWE ASSOCIATES INC /MD/	$68.83M	314,717	0.01%	+21.3%
6	MILLENNIUM MANAGEMENT LLC	$65.28M	298,480	0.04%	+584.4%
7	WELLINGTON MANAGEMENT GROUP LLP	$38.84M	177,616	0.01%	+89.4%
8	AQR CAPITAL MANAGEMENT LLC	$3.84M	17,540	0.00%	-8.2%
9	TWO SIGMA ADVISERS, LP	$1.25M	4,900	0.00%	-67.5%
10	Gotham Asset Management, LLC	$580.43K	2,654	0.00%	+0.3%

Activist & Large Holders (13D/13G)

Investor	Ownership	Type	Filed
Janus Henderson Group Ltd.	5.5%	13G	2026-08-13
FMR LLC	10.8%

Frequently Asked Questions

Which institutional investors own the most OSIS stock?

As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of OSIS with a position worth $558.13M, representing 0.01% of their portfolio. In total, 10 institutional investors hold OSIS with a combined value of $1.80B.

What percentage of OSIS is owned by institutional investors?

Institutional investors hold $1.80B worth of OSIS stock across 10 positions. The largest institutional holder is BlackRock, Inc. with $558.13M in holdings.

What is a 13F filing and why does it matter for OSIS?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For OSIS, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track OSIS institutional moves

Get notified when hedge funds change their OSIS positions.