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.
Granted 2.88M · Sold 2.62M
Granted 63.2K · Sold 45.5K
Granted 400.7K · Sold 452.0K
Granted 94.3K · Sold 88.9K
Granted 205.1K · Sold 141.9K
Granted 220.4K · Sold 182.8K
Granted 294.9K · Bought 2.5K · Sold 255.1K
Granted 23.4K · Bought 10.5K
Granted 66.8K · Sold 79.1K
Granted 104.8K · Sold 88.7K
Granted 47.9K · Sold 10.0K
Granted 26.5K · Sold 21.8K
Granted 111.4K · Sold 99.2K
Granted 42.0K · Sold 24.6K
Granted 87.6K · Sold 81.0K
Granted 27.1K · Sold 19.4K
Granted 194.7K · Sold 187.2K
Granted 125.3K · Sold 121.3K
Granted 37.9K · Sold 27.6K
Granted 86.8K · Bought 1.0K · Sold 85.6K
Granted 41.4K · Sold 22.2K
Granted 10.3K · Sold 5.8K
Granted 23.7K · Sold 21.9K
Granted 102.2K · Sold 96.2K
Granted 36.6K · Sold 29.5K
Granted 16.8K · Sold 11.9K
Granted 2.8K · Bought 6.8K
Granted 35.4K · Bought 1.0K · Sold 29.6K
Granted 244.1K · Sold 240.0K
Granted 68.4K · Sold 62.0K
Granted 40.0K · Sold 34.0K
Granted 2.7K
Granted 14.0K · Sold 5.5K
Granted 40.9K · Bought 7.0K · Sold 51.3K
Granted 2.6K
Granted 2.9K · Bought 980
Granted 44.5K · Sold 38.1K
Granted 29.9K · Bought 1.0K · Sold 28.4K
Granted 2.6K · Bought 1.0K
Granted 4.5K
Granted 2.2K
Granted 4.0K
Granted 14.6K · Bought 1.4K · Sold 14.3K
Granted 2.8K
Granted 1.4K
Granted 779
Granted 728
Granted 276
Granted 208
Granted 101
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Ayers Jonathan WDirector · 614 transactions | — | 1.15Mas of Sep 2024 | 2.88M | — | 2.62M |
| Fratoni S SamCorporate Vice President · 28 transactions | — | 152.8Kas of Dec 2008 | 63.2K | — | 45.5K |
| Raines MerileeExecutive VP & CFO · 116 transactions | — | 93.4Kas of Feb 2013 | 400.7K | — | 452.0K |
| Dupree Thomas JCorporate Vice President · 38 transactions | — | 88.1Kas of Feb 2011 | 94.3K | — | 88.9K |
| Mazelsky Jonathan JayPresident and CEO, Director · 148 transactions | — | 83.8K | 205.1K | — | 141.9K |
| Williams Michael J PhDExecutive Vice President · 104 transactions | — | 59.1Kas of Aug 2016 | 220.4K | — | 182.8K |
| McKeon Brian PEVP, CFO and Treasurer · 200 transactions | — | 49.6Kas of Feb 2025 | 294.9K | 2.5K | 255.1K |
| Murray Robert JDirector · 36 transactions | — | 45.9Kas of May 2015 | 23.4K | 10.5K | — |
| End William TDirector · 34 transactions | — | 31.8Kas of May 2018 | 66.8K | — | 79.1K |
| Naqui AliCorporate Vice President · 79 transactions | — | 30.5Kas of May 2013 | 104.8K | — | 88.7K |
| Mazelsky JayInterim President & CEO · 54 transactions | — | 28.3Kas of Aug 2019 | 47.9K | — | 10.0K |
| Goodspeed William B.Corporate Vice President · 21 transactions | — | 26.4Kas of Apr 2011 | 26.5K | — | 21.8K |
| Hulsy Robert SCorporate Vice President · 21 transactions | — | 26.2Kas of Mar 2007 | 111.4K | — | 99.2K |
| Powers Johnny DExecutive Vice President · 48 transactions | — | 26.0Kas of Dec 2015 | 42.0K | — | 24.6K |
| Craig ThomasDirector · 106 transactions | — | 24.5Kas of Apr 2017 | 87.6K | — | 81.0K |
| Tonelli Quentin JCorporate Vice President · 22 transactions | — | 21.4Kas of May 2007 | 27.1K | — | 19.4K |
| Wallen William CSenior VP & CSO · 43 transactions | — | 19.1Kas of Feb 2010 | 194.7K | — | 187.2K |
| Twigge GiovaniSenior Vice President · 95 transactions | — | 18.4Kas of Feb 2022 | 125.3K | — | 121.3K |
| Hunt NimrataExecutive Vice President · 70 transactions | — | 18.3K | 37.9K | — | 27.6K |
| Henderson Rebecca MDirector · 52 transactions | — | 17.7Kas of Feb 2021 | 86.8K | 1.0K | 85.6K |
| Brown William E IIIExecutive Vice President · 21 transactions | — | 17.0Kas of Feb 2013 | 41.4K | — | 22.2K |
| Erickson Michael GExecutive Vice President · 27 transactions | — | 15.1K | 10.3K | — | 5.8K |
| Johnson Barry CDirector · 14 transactions | — | 13.5Kas of Aug 2016 | 23.7K | — | 21.9K |
| Polewaczyk James FExecutive Vice President · 111 transactions | — | 11.5Kas of Mar 2024 | 102.2K | — | 96.2K |
| Fennell GeorgeExecutive Vice President · 42 transactions | — | 10.7K | 36.6K | — | 29.5K |
| Williams Michael JCorporate Vice President · 24 transactions | — | 10.2Kas of Sep 2009 | 16.8K | — | 11.9K |
| Kingsley Lawrence DDirector · 24 transactions | — | 9.6K | 2.8K | 6.8K | — |
| Vandebroek Sophie V.Director · 43 transactions | — | 9.1K | 35.4K | 1.0K | 29.6K |
| Deady Conan RCorp VP and General Counsel · 129 transactions | — | 8.3Kas of Mar 2013 | 244.1K | — | 240.0K |
| Lane MichaelExecutive Vice President · 104 transactions | — | 8.2K | 68.4K | — | 62.0K |
| Turner Kathy VSenior Vice President · 70 transactions | — | 7.5Kas of Feb 2023 | 40.0K | — | 34.0K |
| Desouza Errol BDirector · 14 transactions | — | 7.3Kas of Apr 2009 | 2.7K | — | — |
| Underberg Sharon E.EVP, GC & Corporate Secretary · 39 transactions | — | 7.1K | 14.0K | — | 5.5K |
| Szostak M AnneDirector · 89 transactions | — | 5.3K | 40.9K | 7.0K | 51.3K |
| Emerson AndrewEVP, CFO and Treasurer · 10 transactions | — | 4.4K | 2.6K | — | — |
| Meyaard Daniel VCorporate Vice President · 8 transactions | — | 4.4Kas of Feb 2013 | 2.9K | 980 | — |
| Studer JacquelineCVP, Gen. Counsel & Secretary · 52 transactions | — | 4.4Kas of Feb 2019 | 44.5K | — | 38.1K |
| Junius Daniel MDirector · 61 transactions | — | 3.6K | 29.9K | 1.0K | 28.4K |
| Vumbacco Joseph VDirector · 3 transactions | — | 3.6Kas of Aug 2012 | 2.6K | 1.0K | — |
| Johnson Michael PerkinsExecutive Vice President · 11 transactions | — | 2.8K | 4.5K | — | — |
| Essig StuartDirector · 21 transactions | — | 2.2Kas of May 2025 | 2.2K | — | — |
| Schreck MichaelExecutive Vice President · 18 transactions | — | 2.1K | 4.0K | — | — |
| Claflin Bruce L.Director · 13 transactions | — | 1.7Kas of May 2024 | 14.6K | 1.4K | 14.3K |
| Smith Martin AlexanderExecutive Vice President · 23 transactions | — | 1.6K | 2.8K | — | — |
| Kerr Irene CCorporate Vice President · 2 transactions | — | 1.4Kas of Feb 2008 | 1.4K | — | — |
| COLLINS AshaDirector · 7 transactions | — | 779as of May 2024 | 779 | — | — |
| Fiarman JeffreyEVP, GEN COUNSEL & SECRETARY · 2 transactions | — | 651as of Jun 2014 | 728 | — | — |
| 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 all recorded history: -5.29M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.