Idexx Laboratories Inc /de
A maker of diagnostic tests and software for veterinarians, from point-of-care analyzers like Catalyst One and SNAP rapid tests to practice software such as ezyVet and Cornerstone. It also sells water-testing kits like Colilert, used by labs and utilities to spot E. coli, plus tests for livestock diseases and antibiotic residues in milk. Founded in 1983 in Maine as AgriTech Systems, it later renamed itself IDEXX after "Idx," clinical shorthand for immunochemical diagnostics.
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| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Ayers Jonathan WDirector · 57 transactions | — | 1.15Mas of Sep 2024 | 23.8K | — | 20.7K |
| Mazelsky Jonathan JayPresident and CEO, Director · 89 transactions | +69.3% | 83.8K | 153.3K | — | 108.9K |
| McKeon Brian PEVP, CFO and Treasurer · 67 transactions | +11.8% | 49.6Kas of Feb 2025 | 78.1K | — | 68.9K |
| Twigge GiovaniSenior Vice President · 8 transactions | +7.6% | 18.4Kas of Feb 2022 | 3.4K | — | — |
| Hunt NimrataExecutive Vice President · 48 transactions | +95.3% | 18.3K | 33.1K | — | 22.2K |
| Erickson Michael GExecutive Vice President · 27 transactions | — | 15.1K | 10.3K | — | 5.8K |
| Polewaczyk James FExecutive Vice President · 43 transactions | -41.2% | 11.5Kas of Mar 2024 | 39.2K | — | 47.2K |
| Fennell GeorgeExecutive Vice President · 38 transactions | +1042.5% | 10.7K | 35.6K | — | 29.5K |
| Kingsley Lawrence DDirector · 10 transactions | +23% | 9.6K | 1.8K | — | — |
| Vandebroek Sophie V.Director · 17 transactions | — | 9.1K | 7.2K | — | 6.7K |
| Lane MichaelExecutive Vice President · 41 transactions | +59.4% | 8.2K | 30.9K | — | 25.4K |
| Turner Kathy VSenior Vice President · 39 transactions | +151.7% | 7.5Kas of Feb 2023 | 28.2K | — | 23.1K |
| Underberg Sharon E.EVP, GC & Corporate Secretary · 32 transactions | +280.1% | 7.1K | 11.8K | — | 5.5K |
| Szostak M AnneDirector · 29 transactions | — | 5.3K | 6.6K | — | 10.7K |
| Emerson AndrewEVP, CFO and Treasurer · 10 transactions | — | 4.4K | 2.6K | — | — |
| Junius Daniel MDirector · 19 transactions | +23% | 3.6K | 8.6K | — | 7.9K |
| Johnson Michael PerkinsExecutive Vice President · 11 transactions | — | 2.8K | 4.5K | — | — |
| Essig StuartDirector · 6 transactions | +110.2% | 2.2Kas of May 2025 | 1.2K | — | — |
| Schreck MichaelExecutive Vice President · 18 transactions | — | 2.1K | 4.0K | — | — |
| Claflin Bruce L.Director · 4 transactions | — | 1.7Kas of May 2024 | 1.9K | — | 200 |
| Smith Martin AlexanderExecutive Vice President · 23 transactions | — | 1.6K | 2.8K | — | — |
| COLLINS AshaDirector · 4 transactions | +628% | 779as of May 2024 | 672 | — | — |
| Hooley Joseph LDirector · 4 transactions | — | 276 | 276 | — | — |
| Britt Irene ChangDirector · 1 transaction | — | 208as of May 2024 | 208 | — | — |
| Peacock KarenDirector · 1 transaction | — | 102 | 101 | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 5 years: -382.8K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.