OSI Systems, Inc.
OSI Systems, Inc. (OSIS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OSIS · as of Sep 30, 2025
Ownership Breakdown
360
Institutional Holders
▲ 2 vs Q2
$4.66B
Total Inst. Value
▲ $458.19M vs Q2
16.48M
Shares Outstanding
freeFloat 94.45%
18.70M
13F Shares Held
▲ 5,343 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
OSIS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. semiconductors & related devices | 2.50M | 14.58% | 14.58% | $624.16B | Nov 12, 2025 | ▼ 452 |
VANGUARD GROUP INC semiconductors & related devices | 2.11M | 12.27% | 12.27% | $525.29B | Nov 7, 2025 | ▼ 4.8K |
FMR LLC semiconductors & related devices | 1.09M | 6.35% | 6.35% | $271.74B | Nov 13, 2025 | ▼ 100.4K |
JANUS HENDERSON GROUP PLC semiconductors & related devices | 1.00M | 5.82% | 5.82% | $249.31B | Nov 14, 2025 | ▼ 52.4K |
MAWER INVESTMENT MANAGEMENT LTD. semiconductors & related devices | 856.4K | 4.99% | 4.99% | $213.44B | Nov 4, 2025 | ▲ 343.7K |
CAPITAL INTERNATIONAL INVESTORS semiconductors & related devices | 674.3K | 3.93% | 3.93% | $168.07B | Nov 13, 2025 | — held |
STATE STREET CORP semiconductors & related devices | 665.9K | 3.88% | 3.88% | $165.97B | Nov 14, 2025 | ▼ 416 |
UBS ASSET MANAGEMENT AMERICAS INC semiconductors & related devices | 550.5K | 3.20% | 3.20% | $137.21B | Nov 14, 2025 | ▼ 25.2K |
DIMENSIONAL FUND ADVISORS LP semiconductors & related devices | 419.5K | 2.44% | 2.44% | $104.53B | Nov 12, 2025 | ▼ 29.9K |
GEODE CAPITAL MANAGEMENT, LLC semiconductors & related devices | 394.3K | 2.30% | 2.30% | $98.28B | Nov 12, 2025 | ▲ 13.1K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
18
Increased
+1.21M shares0
New Positions
first time holders31
Decreased
−570.1K shares0
Sold Out
fully exitedNet shares change (top 50)
+635.7K
+1.21M / −570.1K
Net new holders
-13
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
OSIS insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
2
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
CHOPRA DEEPAK director | May 4, 2026 | Sale | 20,000 | $281.84 | $5.64M | 253.0K | Form 4 ↗ |
Constantine W Paul PRES., SPACELABS HEALTHCARE | Apr 23, 2026 | Tax Withhold | 65 | $292.52 | $19.0K | 1.4K | Form 4 ↗ |
CHOPRA DEEPAK director | Feb 2, 2026 | Sale | 20,000 | $250.91 | $5.02M | 273.0K | Form 4 ↗ |
Constantine W Paul PRES., SPACELABS HEALTHCARE | Dec 31, 2025 | Award | 55 | $192.73 | $10.6K | 1.4K | Form 4 ↗ |
SZE VICTOR S GENERAL COUNSEL | Dec 31, 2025 | Award | 75 | $140.61 | $10.5K | 87.2K | Form 4 ↗ |
Morben Paul Keith PRES., OPTOELECTRONICS DIV | Dec 31, 2025 | Award | 75 | $140.61 | $10.5K | 8.6K | Form 4 ↗ |
Tropeano Michael PRESIDENT, RAPISCAN SYSTEMS | Dec 31, 2025 | Award | 75 | $140.61 | $10.5K | 3.5K | Form 4 ↗ |
CHOPRA DEEPAK director | Dec 31, 2025 | Award | 75 | $140.61 | $10.5K | 293.0K | Form 4 ↗ |
Okawa Cary M. CHIEF ACCOUNTING OFFICER | Dec 31, 2025 | Award | 52 | $109.61 | $5.7K | 3.3K | Form 4 ↗ |
EDRICK ALAN I EVP & CFO | Dec 31, 2025 | Award | 75 | $140.61 | $10.5K | 295.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
OSI Systems, Inc. (OSIS) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 5.55%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of OSI Systems, Inc. is BLACKROCK, INC., holding approximately 2.50 million shares — equal to 14.58% of outstanding shares — as of September 30, 2025.
A total of 360 institutional investors currently hold OSIS stock, with a combined institutional value of approximately $4.66 billion as of the most recent 13F filing period.
Frequently asked questions
OSIS ownershipOSI Systems, Inc. (OSIS) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is BLACKROCK, INC. with a 14.58% stake. Company insiders hold 5.55%. Data sourced from SEC Form 13F as of September 30, 2025.