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OSIS · Osi Systems Inc

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Market Cap
$3.25B
Shares
15.94M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 369
Total Value: $4,173,249,793
Total Shares: 19,082,078
Showing 1–100 of 375 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 369 13F filers · Δ vs Mar 31, 2026
Top Holder
13.4%
Sep 2023 → Jun 2026 · range 13.1% – 17.5%
+0.1 pts
Top 5
37.6%
Sep 2023 → Jun 2026 · range 37.6% – 49.4%
−0.3 pts
Top 10
51.3%
Sep 2023 → Jun 2026 · range 51.3% – 61.5%
−1.3 pts
HHI
428
Sep 2023 → Jun 2026 · range 428 – 674
Broadly held−15

Quarterly Activity

vs Mar 31, 2026
New
61
Increased
129
Decreased
139
Sold Out
66
Unchanged
40
Holder count: -5
Institutional value: -17.5%
Shares held: +0.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 375
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1039065 CUSIP 671044105 13F (30d) 237 filings 236 filers Visit website Investor relations