Who owns OSI SYSTEMS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of OSIS from SEC Form 13F filings across 367 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 367 institutions disclosed 18.9M shares of OSI SYSTEMS INC worth $4.14B — about 114.2% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
367
13F holders
$4.14B
value, 2026 filers
114.2%
of shares outstanding (18.9M sh)
60
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of OSIS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 2.6M | $558.1M | 0.0% | 15.4% | +0.9% |
| 2 | FMR LLC | 1.7M | $380.1M | 0.0% | 10.5% | -11.6% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.3M | $278.2M | 0.0% | 7.7% | +1.8% |
| 4 | Jupiter Topco LLCNEW | 905,925 | $198.1M | 0.1% | 5.5% | new |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 703,070 | $153.8M | 0.0% | 4.2% | +0.5% |
| 6 | STATE STREET CORP | 674,053 | $147.4M | 0.0% | 4.1% | +1.8% |
| 7 | Capital International Investors | 596,331 | $130.4M | 0.0% | 3.6% | -3.7% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 463,787 | $101.4M | 0.0% | 2.8% | +5.2% |
| 9 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 452,547 | $99.0M | 0.0% | 2.7% | +5.1% |
| 10 | Channing Capital Management, LLC | 432,851 | $94.7M | 2.2% | 2.6% | +62.2% |
| 11 | Hood River Capital Management LLC | 414,304 | $90.6M | 0.7% | 2.5% | +11.3% |
| 12 | DIMENSIONAL FUND ADVISORS LP | 414,034 | $90.5M | 0.0% | 2.5% | +4.7% |
| 13 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 379,351 | $83.0M | 0.2% | 2.3% | +121.0% |
| 14 | NEUBERGER BERMAN GROUP LLC | 324,715 | $70.9M | 0.0% | 2% | +6.8% |
| 15 | PRICE T ROWE ASSOCIATES INC /MD/ | 314,717 | $68.8M | 0.0% | 1.9% | +21.3% |
| 16 | MILLENNIUM MANAGEMENT LLC | 298,480 | $65.3M | 0.0% | 1.8% | +584.4% |
| 17 | Invesco Ltd. | 263,207 | $57.6M | 0.0% | 1.6% | -29.5% |
| 18 | PRIMECAP MANAGEMENT CO/CA/ | 258,180 | $56.5M | 0.0% | 1.6% | +5.5% |
| 19 | AMERICAN CENTURY COMPANIES INC | 223,142 | $48.8M | 0.0% | 1.3% | +337.6% |
| 20 | NEUMEIER POMA INVESTMENT COUNSEL LLC | 222,515 | $48.7M | 3.3% | 1.3% | +16.2% |
| 21 | Clark Capital Management Group, Inc. | 218,913 | $47.9M | 0.3% | 1.3% | -19.0% |
| 22 | SYSTEMATIC FINANCIAL MANAGEMENT LP | 216,098 | $47.3M | 0.9% | 1.3% | -1.4% |
| 23 | UBS Group AG | 210,866 | $46.1M | 0.0% | 1.3% | +55.1% |
| 24 | VAN ECK ASSOCIATES CORP | 199,636 | $43.7M | 0.0% | 1.2% | +6.1% |
| 25 | MORGAN STANLEY | 197,990 | $43.3M | 0.0% | 1.2% | -5.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.