IDXX Institutional Ownership
Who owns Idexx Laboratories Inc and what the big funds did with it last quarter, from every SEC 13F filing. 1,305 funds reported holding IDXX at Jun 30, 2026, together owning 94.6% of the company.
- ●574 buying vs 611 selling
- ▲Held by funds +1.4 pts
- ▼Funds holding -17
- ▲Superinvestors: 4 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 | 1,305 | 1,322 | −1.3% |
| In funds' top 10 | 13 | 16 | −18.8% |
| 13F shares | 74.5M | 73.4M | +1.5% |
| Held by funds | 94.6% | 93.2% | +1.4 pts |
| New positions | 102 | 106 | −3.8% |
| Increased | 472 | 428 | +10.3% |
| Reduced | 504 | 515 | −2.1% |
| Sold out | 107 | 174 | −38.5% |
| Calls (shares) | 27K | 44K | −38.0% |
| Puts (shares) | 6,937 | 11K | −38.4% |
| Put/call ratio | 0.28 | 0.39 | −27.3% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in IDXX
All superinvestors →
Who owns IDXX
share of fund held shares- Index and passive funds41.7%
- Active managers and hedge funds41.1%
- Banks and brokers14.3%
- Pensions, insurers and other2.9%
The top 10 holders own 43.9% of all IDXX 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
438 funds changed their position- Principal Financial Group IncTrimmed−653K sh
- Assenagon Asset Management S.A.Trimmed−110K sh
- KBC Group NVTrimmed−68K sh
- Robeco Institutional Asset Management B.V.Trimmed−66K sh
- Vontobel Holding Ltd.Trimmed−64K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 10.37% | 8.2M | $4.3B | −195K |
| 2 | Vanguard Capital Management LLC | 6.54% | 5.2M | $2.7B | −30K |
| 3 | Vanguard Portfolio Management LLC | 4.95% | 3.9M | $2.1B | −14K |
| 4 | State Street Corp | 4.76% | 3.7M | $2B | +74K |
| 5 | Invesco Ltd. | 4.58% | 3.6M | $1.9B | +262K |
| 6 | Geode Capital Management, LLC | 3.25% | 2.6M | $1.3B | −98K |
| 7 | Bamco Inc /ny/ | 2.51% | 2M | $1B | +343K |
| 8 | Morgan Stanley | 1.72% | 1.4M | $714M | +40K |
| 9 | Bank of New York Mellon Corp | 1.51% | 1.2M | $628M | −311K |
| 10 | Arrowstreet Capital, Limited Partnership | 1.35% | 1.1M | $562M | +228K |
- Fmr LLC+540K sh+$284M
- Norges Bank+354K sh+$186M
- Baillie Gifford & Co+354K sh+$186M
- Bamco Inc /ny/+343K sh+$181M
- Massachusetts Financial Services Co /ma/+337K sh+$180M
- Assenagon Asset Management S.A.+281K sh+$148M
- Invesco Ltd.+262K sh+$138M
- Arrowstreet Capital, Limited Partnership+228K sh+$120M
- Capital World Investors−498K sh−$280M
- Fundsmith LLP−446K sh−$235M
- Bank of New York Mellon Corp−311K sh−$164M
- Railway Pension Investments Ltd−211K sh−$111M
- Los Angeles Capital Management LLC−210K sh−$110M
- BlackRock, Inc.−195K sh−$103M
- Price T Rowe Associates Inc /md/−180K sh−$94.6M
- Polen Capital Management LLC−163K sh−$86M
IDXX institutional ownership FAQ
Who owns the most IDXX stock?
In Q2 2026 13F filings the largest holder of IDXX was BlackRock, Inc., followed by Vanguard Capital Management LLC and Vanguard Portfolio Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of IDXX is owned by institutions?
Funds that file 13F reports held 94.6% of IDXX's shares at Jun 30, 2026, compared with 93.2% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying IDXX?
In Q2 2026, 574 funds bought IDXX (102 of them new positions) and 611 sold (107 sold out completely). Among well known investors, 4 added and 2 cut. Our fund sentiment for IDXX is neutral.
What is IDXX's institutional put/call ratio?
Funds reported $4M of IDXX puts against $14.2M of calls, a put/call ratio of 0.28 (0.39 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this IDXX 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.