OSI Systems Inc (OSIS)
Who owns OSI Systems Inc (OSIS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 94.4% of the shares are freely tradable; institutional investors hold 124.6%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.35 | 2,529,623 | -1.3 | 03/31/2026 |
| Vanguard Group Inc | 12.78 | 2,106,595 | +0.0 | 12/31/2025 |
| FMR Inc | 11.93 | 1,967,088 | +18.7 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 7.58 | 1,249,748 | +0.0 | 03/31/2026 |
| HHG PLC | 4.69 | 772,314 | +2.6 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.24 | 699,253 | +0.0 | 03/31/2026 |
| Mawer Investment Management Ltd | 4.02 | 662,634 | -17.5 | 03/31/2026 |
| State Street Corp | 4.02 | 662,141 | +0.6 | 03/31/2026 |
| Capital Research & Mgmt Co - Division 3 | 3.76 | 619,479 | -8.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.69 | 938,586 | +0.0 | 05/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 28. Jul 2026 | Bernard Kelli | Director | Other | 149 | 217.30 | 32,378 |
| 28. Jul 2026 | Chizever Gerald M | Director | Other | 166 | 217.30 | 36,072 |
| 28. Jul 2026 | Hawkins James B | Director | Other | 170 | 217.30 | 36,941 |
| 20. Jul 2026 | Bernard Kelli | Director | Other | 924 | 216.65 | 200,185 |
| 20. Jul 2026 | Ballhaus William Francis JR | Director | Other | 924 | 216.65 | 200,185 |
| 20. Jul 2026 | Chizever Gerald M | Director | Other | 924 | 216.65 | 200,185 |
| 20. Jul 2026 | Chopra Deepak | Director | Other | 924 | 216.65 | 200,185 |
| 20. Jul 2026 | Hawkins James B | Director | Other | 924 | 216.65 | 200,185 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.