OSI Systems
OSIS · NASDAQ
$194.86+$0.89 (+0.46%)TodayMarket closed ·
Prev close $193.97
Who owns OSIS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 56.2% of OSIS’s shares.
- BlackRock Institutional Trust Company, N.A.13.8%
- Fidelity Management & Research Company LLC9.3%
- Vanguard Portfolio Management, LLC7.7%
- Janus Henderson Investors5.5%
- Next 6 largest institutions19.9%
- All other shareholders43.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 2.27M | 13.77% |
| Fidelity Management & Research Company LLC | 1.53M | 9.31% |
| Vanguard Portfolio Management, LLC | 1.27M | 7.72% |
| Janus Henderson Investors | 905.92K | 5.50% |
| Vanguard Capital Management, LLC | 703.07K | 4.27% |
| State Street Investment Management (US) | 674.05K | 4.09% |
| Capital International Investors | 596.33K | 3.62% |
| Geode Capital Management, L.L.C. | 463.79K | 2.81% |
| Channing Capital Management, LLC | 432.85K | 2.63% |
| Hood River Capital Management LLC | 414.30K | 2.51% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 944.18K | 5.73% |
| American Funds SMALLCAP World Fund | 580.14K | 3.52% |
| Vanguard Total Stock Market Index Fund | 498.36K | 3.02% |
| iShares Russell 2000 ETF | 413.77K | 2.51% |
| Janus Henderson Triton Fund | 412.31K | 2.50% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $5.64M (1 trade) of OSIS on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Morben Paul Keith | Tax withholding | 1.33K | $275.16K |
| Morben Paul Keith | Award | 1.08K | $223.89K |
| Okawa Cary M. | Tax withholding | 460 | $95.10K |
| Okawa Cary M. | Award | 908 | $187.71K |
| Tropeano Michael | Tax withholding | 99 | $20.47K |
| Tropeano Michael | Award | 287 | $59.33K |
| SZE VICTOR S | Tax withholding | 15.00K | $3.10M |
| SZE VICTOR S | Award | 16.84K | $3.48M |
| Grindstaff Glenn | Tax withholding | 1.71K | $353.09K |
| Grindstaff Glenn | Award | 1.97K | $407.05K |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.09M
- Days to cover
- 10.26
- % of shares outstanding
- 12.66%
- Average daily volume
- 203.41K
- Change since last report
- −1.7%
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