IDEXX Laboratories Inc
IDXX- Exchange
- Nasdaq
- Industry
- In Vitro & In Vivo Diagnostic Substances
- SEC CIK
- 0000874716
In the last 90 days, IDEXX Laboratories Inc insiders filed 0 open-market purchases and 1 sale; 1,306 institutions reported holding it in 13F filings for Q2 2026, worth $39.1B in total; 3 superinvestors hold it, including Fundsmith and Weitz Investment Management.
Superinvestors holding IDXX, Q2 2026
3 superinvestors report holding IDEXX Laboratories Inc on Form 13F, worth $555.7M in total. Weight is IDEXX Laboratories Inc's share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| FundsmithTerry Smith | 3.9% | 1,019,887 | $536.9M | Reduced−30.4% |
| Weitz Investment ManagementWally Weitz | 1.3% | 35,300 | $18.6M | Unchanged |
| Harris Associates (Oakmark)Bill Nygren | <0.1% | 455 | $239.5K | Reduced−5.6% |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of IDXX each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q2 2026
3 superinvestors holding at quarter end
- Reduced
- Fundsmith (−30.4%), Harris Associates (Oakmark) (−5.6%)
Q1 2026
3 superinvestors holding at quarter end
- Added
- Harris Associates (Oakmark) (+5.9%)
- Reduced
- Fundsmith (−21.9%)
Q4 2025
3 superinvestors holding at quarter end
- Reduced
- Fundsmith (−28.1%), Weitz Investment Management (−37.9%)
Q3 2025
3 superinvestors holding at quarter end
- New
- Harris Associates (Oakmark)
- Reduced
- Fundsmith (−1.1%), Weitz Investment Management (−5.8%)
Q2 2025
2 superinvestors holding at quarter end
- Reduced
- Fundsmith (−0.3%)
Q1 2025
2 superinvestors holding at quarter end
- New
- Weitz Investment Management
- Reduced
- Fundsmith (−0.5%)
Q4 2024
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (0.0%)
Q3 2024
1 superinvestor holding at quarter end
- Added
- Fundsmith (0.0%)
Q2 2024
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (−1.9%)
Q1 2024
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (−0.5%)
- Sold out
- Maverick Capital
Q4 2023
2 superinvestors holding at quarter end
- New
- Maverick Capital
- Reduced
- Fundsmith (−7.9%)
Q3 2023
1 superinvestor holding at quarter end
- Added
- Fundsmith (+0.1%)
- Sold out
- Maverick Capital
Q2 2023
2 superinvestors holding at quarter end
- New
- Maverick Capital
- Added
- Fundsmith (+0.2%)
Q1 2023
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (−14.2%)
Q4 2022
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (−4.9%)
- Sold out
- Maverick Capital
Q3 2022
2 superinvestors holding at quarter end
- New
- Maverick Capital
- Added
- Fundsmith (+0.1%)
Q2 2022
1 superinvestor holding at quarter end
- Added
- Fundsmith (0.0%)
Q1 2022
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (−14.7%)
Q4 2021
1 superinvestor holding at quarter end
- Added
- Fundsmith (0.0%)
Q3 2021
1 superinvestor holding at quarter end
- Reduced
- Fundsmith (0.0%)
- Sold out
- Maverick Capital
Q2 2021
2 superinvestors holding at quarter end
- Added
- Fundsmith (+0.5%), Maverick Capital (+4,470.3%)