Who owns OSI Systems, Inc.?
Institutional ownership of OSIS from SEC Form 13F filings across 252 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.
252
13F holders
$3.35B
value, 2026 filers
95.4%
of shares outstanding (15.7M sh)
32
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% | 15.5% | +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% | 4.3% | -49.7% |
| 6 | Capital International Investors | 596,331 | $130.4M | 0.0% | 3.6% | -3.7% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 463,787 | $101.4M | 0.0% | 2.8% | +5.2% |
| 8 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 452,547 | $99.0M | 0.0% | 2.7% | +5.1% |
| 9 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 379,351 | $83.0M | 0.2% | 2.3% | +121.0% |
| 10 | NEUBERGER BERMAN GROUP LLC | 324,715 | $70.9M | 0.0% | 2% | +6.8% |
| 11 | PRICE T ROWE ASSOCIATES INC /MD/ | 314,717 | $68,829 | 0.0% | 1.9% | +21.3% |
| 12 | MILLENNIUM MANAGEMENT LLC | 298,480 | $65.3M | 0.0% | 1.8% | +584.4% |
| 13 | Invesco Ltd. | 263,207 | $57.6M | 0.0% | 1.6% | -29.5% |
| 14 | PRIMECAP MANAGEMENT CO/CA/ | 258,180 | $56.5M | 0.0% | 1.6% | +5.5% |
| 15 | AMERICAN CENTURY COMPANIES INC | 223,142 | $48.8M | 0.0% | 1.4% | +337.6% |
| 16 | Clark Capital Management Group, Inc. | 218,913 | $47.9M | 0.3% | 1.3% | -19.0% |
| 17 | UBS Group AG | 210,866 | $46.1M | 0.0% | 1.3% | +55.1% |
| 18 | VAN ECK ASSOCIATES CORP | 199,636 | $43.7M | 0.0% | 1.2% | +6.1% |
| 19 | MORGAN STANLEY | 197,990 | $43.3M | 0.0% | 1.2% | -5.9% |
| 20 | Sixth Street Partners Management Company, L.P.NEW | 193,801 | $42.4M | 7.3% | 1.2% | new |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 193,801 | $42.4M | 0.0% | 1.2% | -3.6% |
| 22 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 192,062 | $41.9M | 0.1% | 1.2% | -17.4% |
| 23 | JPMORGAN CHASE & CO | 189,751 | $40.6M | 0.0% | 1.2% | +9.8% |
| 24 | AMERIPRISE FINANCIAL INC | 185,377 | $40.5M | 0.0% | 1.1% | +97.0% |
| 25 | NORTHERN TRUST CORP | 181,359 | $39.7M | 0.0% | 1.1% | +6.1% |
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.