OSIS OSI Systems, Inc.
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.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 2.6M | 13.4% |
| 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 | 3.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 463.8K | 2.4% |
| 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 |
| First Eagle Investment Management, LLC | Increased | 24.7K | 104.3K | +79.7K |
| 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 |
| NEUMEIER POMA INVESTMENT COUNSEL LLC | Increased | 191.4K | 222.5K | +31.1K |
| Clearbridge Investments, LLC | Reduced | 163.6K | 135.3K | -28.3K |
| Divisadero Street Capital Management, LP | New | 0 | 27.9K | +27.9K |
| SG Capital Management LLC | Sold Out | 27.0K | 0 | -27.0K |
| Capital International Investors | Reduced | 619.5K | 596.3K | -23.1K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 440.7K | 463.8K | +23.1K |
| XTX Topco Ltd | New | 0 | 22.7K | +22.7K |
| BlackRock, Inc. | Increased | 2.5M | 2.6M | +22.4K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 1.2M | 1.3M | +22.3K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 430.6K | 452.5K | +22.0K |
| NEUBERGER BERMAN GROUP LLC | Increased | 303.9K | 324.7K | +20.8K |
| Asset Management One Co., Ltd. | Reduced | 83.3K | 62.8K | -20.6K |
| Shannon River Fund Management LLC | Sold Out | 19.3K | 0 | -19.3K |
| MIROVA | Reduced | 65.0K | 46.0K | -19.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 395.4K | 414.0K | +18.6K |
| Weiss Asset Management LP | New | 0 | 18.6K | +18.6K |
| Manatuck Hill Partners, LLC | Increased | 15.3K | 33.3K | +18.0K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 97.9K | 80.1K | -17.9K |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | Increased | 2.4K | 19.4K | +17.0K |
| JPMORGAN CHASE & CO | Increased | 172.8K | 189.8K | +17.0K |
| Hilton Capital Management, LLC | New | 0 | 15.5K | +15.5K |
| Harvest Investment Services, LLC | Sold Out | 15.2K | 0 | -15.2K |
| CITADEL ADVISORS LLC | Sold Out | 14.9K | 0 | -14.9K |
| CITIGROUP INC | Increased | 5.6K | 19.8K | +14.2K |
| PRIMECAP MANAGEMENT CO/CA/ | Increased | 244.7K | 258.2K | +13.5K |
| D. E. Shaw & Co., Inc. | Increased | 7.3K | 20.6K | +13.3K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | Reduced | 14.9K | 1.7K | -13.2K |
| Trexquant Investment LP | New | 0 | 13.1K | +13.1K |
| Dai-ichi Life Insurance Company, Ltd | Reduced | 34.2K | 21.4K | -12.8K |
| CREDIT AGRICOLE S A | Reduced | 25.2K | 12.4K | -12.7K |
| MORGAN STANLEY | Reduced | 210.4K | 198.0K | -12.4K |
| STATE STREET CORP | Increased | 662.1K | 674.1K | +11.9K |
| VAN ECK ASSOCIATES CORP | Increased | 188.2K | 199.6K | +11.5K |
| TRUIST FINANCIAL CORP | Reduced | 17.7K | 6.3K | -11.4K |
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.