BIO Institutional Ownership
Who owns Bio-rad Laboratories, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 401 funds reported holding BIO at Jun 30, 2026.
- ▼169 buying vs 207 selling
- ▲Shares held by funds +11.3%
- ▲Funds holding +4
- ▼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 | 401 | 397 | +1.0% |
| In funds' top 10 | 4 | 5 | −20.0% |
| 13F shares | 22.2M | 20M | +11.3% |
| Held by funds | – | – | – |
| New positions | 56 | 54 | +3.7% |
| Increased | 113 | 142 | −20.4% |
| Reduced | 156 | 95 | +64.2% |
| Sold out | 51 | 61 | −16.4% |
| Calls (shares) | 0 | 800 | −100.0% |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | 0.00 | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in BIO
All superinvestors →
Who owns BIO
share of fund held shares- Index and passive funds26.7%
- Active managers and hedge funds58.0%
- Banks and brokers13.2%
- Pensions, insurers and other2.1%
The top 10 holders own 55.9% of all BIO 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
95 funds changed their position- Assenagon Asset Management S.A.Trimmed−319K sh
- Exchange Traded Concepts, LLCAdded+16K sh
- Fideuram - Intesa Sanpaolo Private Banking S.p.a.Sold out−8,221 sh
- Skylands Capital, LLCSold out−7,225 sh
- Boston Trust Walden CorpTrimmed−5,611 sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | First Eagle Investment Management, LLC | – | 5.2M | $1.5B | +2.6M |
| 2 | BlackRock, Inc. | – | 1.7M | $499M | +19K |
| 3 | Dimensional Fund Advisors LP | – | 945K | $277M | −145K |
| 4 | Vanguard Capital Management LLC | – | 827K | $243M | −4,193 |
| 5 | Ariel Investments, LLC | – | 817K | $240M | +31K |
| 6 | Vanguard Portfolio Management LLC | – | 816K | $240M | −13K |
| 7 | Earnest Partners LLC | – | 581K | $171M | −7,979 |
| 8 | State Street Corp | – | 572K | $168M | +12K |
| 9 | Bank of America Corp /de/ | – | 490K | $144M | +45K |
| 10 | Assenagon Asset Management S.A. | – | 466K | $137M | +319K |
- First Eagle Investment Management, LLC+2.6M sh+$766M
- Assenagon Asset Management S.A.+319K sh+$93.6M
- Goldman Sachs Group Inc+128K sh+$37.6M
- Norges Bank+112K sh+$32.8M
- Nomura Holdings Inc+112K sh+$32.8M
- Neuberger Berman Group LLC+109K sh+$32M
- SG Americas Securities, LLC+104K sh+$30.5M
- Victory Capital Management Inc+103K sh+$30.4M
- Massachusetts Financial Services Co /ma/−388K sh−$114M
- Parnassus Investments, LLC−254K sh−$70.9M
- Southeastern Asset Management Inc/tn/−163K sh−$45.4M
- Dimensional Fund Advisors LP−145K sh−$42.5M
- Mawer Investment Management Ltd.−117K sh−$34.4M
- CIBC Bancorp USA Inc.−120K sh−$33.5M
- Federated Hermes, Inc.−106K sh−$31M
- Citadel Advisors LLC−88K sh−$25.8M
BIO institutional ownership FAQ
Who owns the most BIO stock?
In Q2 2026 13F filings the largest holder of BIO was First Eagle Investment Management, LLC, followed by BlackRock, Inc. and Dimensional Fund Advisors LP. Index fund managers are usually the biggest holders of large companies.
What percentage of BIO is owned by institutions?
401 funds reported holding 22.2M BIO shares at Jun 30, 2026.
Are hedge funds buying BIO?
In Q2 2026, 169 funds bought BIO (56 of them new positions) and 207 sold (51 sold out completely). Among well known investors, 1 added and 2 cut. Our fund sentiment for BIO is neutral.
What is BIO's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this BIO 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.