OSIS Institutional Ownership
Who owns Osi Systems Inc and what the big funds did with it last quarter, from every SEC 13F filing. 369 funds reported holding OSIS at Jun 30, 2026.
- ●185 buying vs 196 selling
- ▼Shares held by funds -9.2%
- ▼Funds holding -8
- ▼Superinvestors: 1 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 369 | 377 | −2.1% |
| In funds' top 10 | 3 | 4 | −25.0% |
| 13F shares | 31.4M | 34.6M | −9.2% |
| Held by funds | – | – | – |
| New positions | 57 | 42 | +35.7% |
| Increased | 128 | 125 | +2.4% |
| Reduced | 136 | 146 | −6.8% |
| Sold out | 60 | 37 | +62.2% |
| Calls (shares) | 29K | 7,500 | +280.0% |
| Puts (shares) | 1,600 | 103K | −98.4% |
| Put/call ratio | 0.06 | 13.69 | −99.6% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in OSIS
All superinvestors →
Who owns OSIS
share of fund held shares- Index and passive funds22.7%
- Active managers and hedge funds68.4%
- Banks and brokers7.8%
- Pensions, insurers and other1.1%
The top 10 holders own 67.9% of all OSIS shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
96 funds changed their position- Swedbank ABTrimmed−35K sh
- Principal Financial Group IncTrimmed−30K sh
- Robeco Schweiz AGAdded+24K sh
- Channing Capital Management, LLCTrimmed−18K sh
- Oppenheimer & Co IncAdded+13K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Absolute Investment Advisers, LLC | – | 12M | $16M | −20K |
| 2 | BlackRock, Inc. | – | 2.6M | $558M | +22K |
| 3 | Fmr LLC | – | 1.7M | $380M | −229K |
| 4 | Vanguard Portfolio Management LLC | – | 1.3M | $278M | +22K |
| 5 | Jupiter Topco LLC | – | 906K | $198M | – |
| 6 | Vanguard Capital Management LLC | – | 703K | $154M | +3,817 |
| 7 | State Street Corp | – | 674K | $147M | +12K |
| 8 | Capital International Investors | – | 596K | $130M | −23K |
| 9 | Geode Capital Management, LLC | – | 464K | $101M | +23K |
| 10 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | – | 453K | $99M | +22K |
- Millennium Management LLC+255K sh+$55.7M
- William Blair Investment Management, LLC+208K sh+$45.4M
- American Century Companies Inc+172K sh+$37.6M
- Channing Capital Management, LLC+166K sh+$36.3M
- Voya Investment Management LLC+116K sh+$25.4M
- T. Rowe Price Investment Management, Inc.+102K sh+$22.2M
- Ameriprise Financial Inc+91K sh+$20M
- Wellington Management Group LLP+84K sh+$18.3M
- Mawer Investment Management Ltd.−663K sh−$176M
- Fmr LLC−229K sh−$50.1M
- Loomis Sayles & Co L P−169K sh−$36.9M
- Driehaus Capital Management LLC−118K sh−$31.3M
- Bank of America Corp /de/−129K sh−$28.2M
- Invesco Ltd.−110K sh−$24.1M
- Axiom Investors LLC /de−45K sh−$12M
- Lord, Abbett & Co. LLC−43K sh−$11.5M
OSIS institutional ownership FAQ
Who owns the most OSIS stock?
In Q2 2026 13F filings the largest holder of OSIS was Absolute Investment Advisers, LLC, followed by BlackRock, Inc. and Fmr LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of OSIS is owned by institutions?
369 funds reported holding 31.4M OSIS shares at Jun 30, 2026.
Are hedge funds buying OSIS?
In Q2 2026, 185 funds bought OSIS (57 of them new positions) and 196 sold (60 sold out completely). Among well known investors, 1 added and 2 cut. Our fund sentiment for OSIS is bearish.
What is OSIS's institutional put/call ratio?
Funds reported $350K of OSIS puts against $6.2M of calls, a put/call ratio of 0.06 (13.69 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this OSIS ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.