IDEXX Laboratories (IDXX) Superinvestor holders
31 of the superinvestors we track hold IDEXX Laboratories (IDXX) in their latest 13F filings, $3.4B in total.
Summary
The largest holder is Ron Baron (Baron Capital (BAMCO)), with $1.0B, 1.6% of the portfolio.
In their latest quarter: 3 opened a new position, 13 added, 12 trimmed.
Who holds it
Each investor's latest 13F filing, largest stake first. What a 13F shows.
| Investor | Last change | Shares | Value | % of portfolio | Filed for |
|---|---|---|---|---|---|
| Ron Baron Baron Capital (BAMCO) |
Added | 1,976,778 | $1.0B | 1.6% | Q2 2026 |
| Arrowstreet Capital | Added | 1,067,078 | $562M | 0.2% | Q2 2026 |
| Terry Smith Fundsmith LLP |
Trimmed | 1,019,887 | $537M | 3.9% | Q2 2026 |
| Dan Davidowitz Polen Capital Management |
Trimmed | 532,384 | $280M | 2.4% | Q2 2026 |
| Hersh Cohen ClearBridge Investments |
Added | 379,502 | $200M | 0.2% | Q2 2026 |
| Baillie Gifford Baillie Gifford & Co |
Trimmed | 290,135 | $152M | 0.1% | Q3 2026 |
| Steve Cohen Point72 Asset Management |
Added | 262,905 | $138M | 0.2% | Q2 2026 |
| Brandon Haley Holocene Advisors |
Added | 175,568 | $92M | 0.2% | Q2 2026 |
| Jim Simons Renaissance Technologies |
Added | 109,784 | $58M | 0.1% | Q2 2026 |
| Jensen Investment Management | Added | 105,709 | $56M | 1.3% | Q2 2026 |
| Paul Marshall Marshall Wace |
Added | 93,128 | $49M | 0.0% | Q2 2026 |
| Cliff Asness AQR Capital Management |
Trimmed | 77,198 | $40M | 0.0% | Q2 2026 |
| Brett Barakett Tremblant Capital Group |
Trimmed | 63,437 | $33M | 1.0% | Q2 2026 |
| Acadian Acadian Asset Management |
Added | 58,545 | $31M | 0.0% | Q3 2026 |
| Man Group Man Group plc |
Added | 51,382 | $27M | 0.1% | Q2 2026 |
| Joel Greenblatt Gotham Asset Management |
Trimmed | 47,154 | $25M | 0.1% | Q2 2026 |
| Wallace Weitz Weitz Investment Management |
Held | 35,300 | $19M | 1.3% | Q2 2026 |
| Ray Dalio Bridgewater Associates |
Added | 33,528 | $18M | 0.1% | Q2 2026 |
| Ensign Peak Ensign Peak Advisors |
Trimmed | 30,147 | $16M | 0.0% | Q2 2026 |
| Alger Fred Alger Management |
Trimmed | 19,606 | $10M | 0.0% | Q2 2026 |
| Alan Howard Brevan Howard |
New position | 10,606 | $6M | 0.1% | Q2 2026 |
| Tom Steyer Farallon Capital Management LLC |
New position | 9,000 | $5M | 0.0% | Q2 2026 |
| Mairs & Power Mairs & Power Inc |
Held | 2,080 | $1M | 0.0% | Q2 2026 |
| Fayez Sarofim Fayez Sarofim & Co |
Trimmed | 2,054 | $1M | 0.0% | Q2 2026 |
| Alec Litowitz Magnetar Capital |
Added | 1,839 | $968,123 | 0.0% | Q2 2026 |
| Two Sigma Two Sigma Investments |
Added | 1,020 | $536,969 | 0.0% | Q2 2026 |
| Ken Tropin Graham Capital Management |
Trimmed | 879 | $462,741 | 0.0% | Q2 2026 |
| First Manhattan First Manhattan Co |
Trimmed | 611 | $321,655 | 0.0% | Q2 2026 |
| Ken Fisher Fisher Investments |
New position | 521 | $272,303 | 0.0% | Q3 2026 |
| Conestoga Conestoga Capital Advisors |
Held | 520 | $271,539 | 0.0% | Q3 2026 |
| Bill Nygren Harris Associates LP |
Trimmed | 455 | $239,530 | 0.0% | Q2 2026 |
Holders by quarter
| Quarter | Superinvestors holding it |
|---|---|
| Q2 2026 | 30 |
| Q1 2026 | 32 |
| Q4 2025 | 29 |
| Q3 2025 | 27 |
| Q2 2025 | 26 |
| Q1 2025 | 25 |
| Q4 2024 | 25 |
| Q3 2024 | 24 |
Questions about IDEXX Laboratories
Which superinvestors own IDEXX Laboratories?
31 of the superinvestors we track hold IDEXX Laboratories (IDXX) in their latest 13F filings, $3.4B in total. Ron Baron, Arrowstreet Capital, Terry Smith, Dan Davidowitz, Hersh Cohen, Baillie Gifford.
Who is the largest superinvestor holder of IDXX?
The largest holder is Ron Baron (Baron Capital (BAMCO)), with $1.0B, 1.6% of the portfolio.
From IDEXX Laboratories's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.