OSIS OSI Systems, Inc.

NASDAQ
$206.73

OSI Systems, Inc. (OSIS) Institutional Ownership

What the institutions did with OSIS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers reporting
413
filed a 13F this quarter
Managers holding
355
-3 on the quarter
Buyers
183
55 opened new
Sellers
190
58 sold out entirely
Buyer share
49.1%
of managers who traded it
Breadth
-1.9
net buyers, as a share of those trading

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Largest holders

Manager Shares % of reported
BlackRock, Inc. 2.6M 13.5%
FMR LLC 1.7M 9.2%
VANGUARD PORTFOLIO MANAGEMENT LLC 1.3M 6.7%
Jupiter Topco LLC 905.9K 4.8%
VANGUARD CAPITAL MANAGEMENT LLC 703.1K 3.7%
STATE STREET CORP 674.1K 3.6%
Capital International Investors 596.3K 3.2%
GEODE CAPITAL MANAGEMENT, LLC 463.8K 2.5%
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 452.5K 2.4%
Channing Capital Management, LLC 432.9K 2.3%
Hood River Capital Management LLC 414.3K 2.2%
DIMENSIONAL FUND ADVISORS LP 414.0K 2.2%
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 379.4K 2.0%
NEUBERGER BERMAN GROUP LLC 324.7K 1.7%
PRICE T ROWE ASSOCIATES INC /MD/ 314.7K 1.7%
MILLENNIUM MANAGEMENT LLC 298.5K 1.6%
Invesco Ltd. 263.2K 1.4%
PRIMECAP MANAGEMENT CO/CA/ 258.2K 1.4%
AMERICAN CENTURY COMPANIES INC 223.1K 1.2%
NEUMEIER POMA INVESTMENT COUNSEL LLC 222.5K 1.2%
Clark Capital Management Group, Inc. 218.9K 1.2%
SYSTEMATIC FINANCIAL MANAGEMENT LP 216.1K 1.1%
UBS Group AG 210.9K 1.1%
VAN ECK ASSOCIATES CORP 199.6K 1.1%
MORGAN STANLEY 198.0K 1.0%

Largest changes

Manager Action Previous Current Change
Mawer Investment Management Ltd. Sold Out 662.6K 0 -662.6K
MILLENNIUM MANAGEMENT LLC Increased 43.6K 298.5K +254.9K
FMR LLC Reduced 2.0M 1.7M -228.9K
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Increased 171.7K 379.4K +207.7K
AMERICAN CENTURY COMPANIES INC Increased 51.0K 223.1K +172.1K
LOOMIS SAYLES & CO L P Reduced 191.5K 22.8K -168.7K
Channing Capital Management, LLC Increased 266.9K 432.9K +166.0K
BANK OF AMERICA CORP /DE/ Reduced 266.4K 137.3K -129.0K
Driehaus Capital Management LLC Sold Out 118.0K 0 -118.0K
VOYA INVESTMENT MANAGEMENT LLC Increased 9.1K 125.2K +116.1K
Invesco Ltd. Reduced 373.3K 263.2K -110.1K
T. Rowe Price Investment Management, Inc. New 0 101.6K +101.6K
AMERIPRISE FINANCIAL INC Increased 94.1K 185.4K +91.3K
WELLINGTON MANAGEMENT GROUP LLP Increased 93.8K 177.6K +83.9K
UBS Group AG Increased 136.0K 210.9K +74.9K
PRICE T ROWE ASSOCIATES INC /MD/ Increased 259.5K 314.7K +55.2K
Clark Capital Management Group, Inc. Reduced 270.4K 218.9K -51.5K
AXIOM INVESTORS LLC /DE Sold Out 45.1K 0 -45.1K
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Reduced 161.5K 116.7K -44.8K
GOLDMAN SACHS GROUP INC Increased 75.1K 119.7K +44.6K
LORD, ABBETT & CO. LLC Sold Out 43.1K 0 -43.1K
Hood River Capital Management LLC Increased 372.1K 414.3K +42.2K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Reduced 232.5K 192.1K -40.4K
NEW YORK STATE COMMON RETIREMENT FUND Increased 71.5K 108.7K +37.2K
Nicholas Investment Partners, LP Sold Out 31.6K 0 -31.6K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.