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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.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by IDEXX Laboratories Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
1 filing
1 insider, $1.17M in total
Insiders trading
1
Net value
−$1.17M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for IDEXX Laboratories Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for IDEXX Laboratories Inc
NameTitleLast reported holdingLast filingFilings, past year
Kingsley Lawrence DDirector9,568Sep 9, 20263
Emerson AndrewEVP, CFO and Treasurer4,421Aug 24, 20262
Hooley Joseph LDirector325Aug 3, 20266
Fennell GeorgeExecutive Vice President10,433Jun 2, 20263
Junius Daniel MDirector3,561May 14, 20262
Essig StuartDirector2,236May 14, 20261
Claflin Bruce L.Director161May 14, 20261
Vandebroek Sophie V.Director905May 14, 20263
Britt Irene ChangDirector208May 14, 20261
Samad SamDirector–May 14, 20261
Peacock KarenDirector102May 14, 20263
Szostak M AnneDirector519May 11, 20261
Underberg Sharon E.EVP, GC & Corporate Secretary7,138Mar 5, 20262
Hunt NimrataExecutive Vice President18,141Mar 5, 20264
Erickson Michael GExecutive Vice President12,693Mar 3, 20262
Mazelsky Jonathan JayPresident and CEO83,803Mar 2, 20262
Smith Martin AlexanderExecutive Vice President2,157Feb 17, 20261
Lane MichaelExecutive Vice President8,024Feb 17, 20261
Johnson Michael PerkinsExecutive Vice President2,795Feb 17, 20261
Schreck MichaelExecutive Vice President3,089Feb 17, 20261
McKeon Brian PEVP, CFO and Treasurer31,550Feb 18, 20250
Ayers Jonathan WDirector122,605IndirectSep 9, 20240
COLLINS AshaDirector779May 8, 20240
Polewaczyk James FExecutive Vice President10,711Mar 7, 20240
Turner Kathy VSenior Vice President7,380Feb 17, 20230
Twigge GiovaniSenior Vice President20,329Feb 25, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 9, 2026 (view filing)5:00 PM ETSep 45 daysKingsley Lawrence DDirectorSSale−2.20K$532.08−$1.17M−18.7%9.57K after
Mar 5, 2026 (view filing)Mar 32 daysHunt NimrataExecutive Vice PresidentSSale−1.76K$634.57−$1.12M−8.8%18.1K after
Mar 2, 2026 (view filing)Feb 264 daysMazelsky Jonathan JayPresident and CEOSSale−23.3K$657.55−$15.3M−21.8%83.6K after13 lots
Feb 27, 2026 (view filing)Feb 261 dayHunt NimrataExecutive Vice PresidentSSale−2.69K$661.54−$1.78M−11.9%19.9K after
Feb 19, 2026 (view filing)Feb 172 daysErickson Michael GExecutive Vice PresidentSSale−5.37K$627.38−$3.37M−29.7%12.7K after6 lots
Feb 19, 2026 (view filing)Feb 172 daysVandebroek Sophie V.DirectorSSale−1.46K$628.62−$920.3K−69.3%648 after2 lots
Feb 11, 2026 (view filing)Feb 101 dayFennell GeorgeExecutive Vice PresidentSSale−11.3K$646.72−$7.34M−53.6%9.82K after8 lots
Nov 10, 2025 (view filing)Nov 73 daysHunt NimrataExecutive Vice PresidentSSale−9.43K$703.34−$6.63M−30.8%21.1K after4 lots
Aug 26, 2025 (view filing)Aug 224 daysSzostak M AnneDirectorSSale−2.19K$647.33−$1.42M−89.3%262 after
Aug 14, 2025 (view filing)Aug 122 daysErickson Michael GExecutive Vice PresidentSSale−405.89$649.96−$263.8K−3.5%11.3K after2 lots
Aug 13, 2025 (view filing)Aug 112 daysHunt NimrataExecutive Vice PresidentSSale−1.20K$656.53−$787.8K−6.7%16.8K after
Aug 12, 2025 (view filing)Aug 84 daysUnderberg Sharon E.EVP, GC & Corporate SecretarySSale−5.45K$651.60−$3.55M−47.0%6.16K after
Aug 8, 2025 (view filing)Aug 62 daysHunt NimrataExecutive Vice PresidentSSale−7.14K$630.43−$4.50M−28.4%18.0K after3 lots
Aug 8, 2025 (view filing)Aug 62 daysMazelsky Jonathan JayPresident and CEOSSale−29.3K$631.98−$18.5M−26.0%83.3K after10 lots
Aug 8, 2025 (view filing)Aug 62 daysLane MichaelExecutive Vice PresidentSSale−8.41K$627.73−$5.28M−54.1%7.13K after3 lots
May 23, 2025 (view filing)May 212 daysSzostak M AnneDirectorSSale−1.05K$513.74−$537.4K−80.0%262 after
May 23, 2025 (view filing)May 212 daysSzostak M AnneDirectorSSale−1.26K$512.34−$645.5K−41.2%1.80K after
May 14, 2025 (view filing)May 131 dayJunius Daniel MDirectorSSale−2.68K$506.41−$1.36M−44.8%3.30K after
May 13, 2025 (view filing)May 94 daysVandebroek Sophie V.DirectorSSale−1.28K$491.34−$628.4K−52.3%1.17K after
Feb 11, 2025 (view filing)Feb 101 dayFennell GeorgeExecutive Vice PresidentSSale−9.99K$462.53−$4.62M−55.0%8.18K after
Feb 10, 2025 (view filing)Feb 73 daysSzostak M AnneDirectorSSale−3.00K$465.95−$1.40M−49.5%3.06K after
Nov 29, 2024 (view filing)Nov 272 daysVandebroek Sophie V.DirectorSSale−344$420.44−$144.6K−27.5%905 after
Sep 9, 2024 (view filing)Sep 63 daysSzostak M AnneDirectorSSale−500$469.37−$234.7K−100.0%0 after
May 20, 2024 (view filing)May 173 daysClaflin Bruce L.DirectorSSale−200$540.80−$108.2K−55.4%161 after
Mar 7, 2024 (view filing)Mar 61 dayPolewaczyk James FExecutive Vice PresidentSSale−8.10K$558.44−$4.53M−43.1%10.7K after3 lots
Mar 7, 2024 (view filing)Mar 52 daysVandebroek Sophie V.DirectorSSale−1.40K$562.98−$790.4K−53.6%1.22K after
Feb 9, 2024 (view filing)Feb 81 dayFennell GeorgeSVP, Chief Revenue OfficerSSale−8.20K$573.87−$4.70M−55.0%6.71K after5 lots
Feb 9, 2024 (view filing)Feb 72 daysMcKeon Brian PEVP, CFO and TreasurerSSale−23.3K$570.01−$13.3M−44.0%29.7K after9 lots
Feb 9, 2024 (view filing)Feb 72 daysMazelsky Jonathan JayPresident and CEOSSale−12.0K$572.61−$6.87M−13.2%79.2K after5 lots
Dec 8, 2023 (view filing)Dec 71 dayPolewaczyk James FExecutive Vice PresidentSSale−11.6K$521.79−$6.07M−53.7%10.0K after4 lots
Dec 6, 2023 (view filing)Dec 42 daysMazelsky Jonathan JayPresident and CEOSSale−7.13K$513.05−$3.66M−8.3%79.2K after2 lots
Sep 5, 2023 (view filing)Aug 315 daysMazelsky Jonathan JayPresident and CEOSSale−13.4K$512.01−$6.87M−15.5%72.9K after
Aug 31, 2023 (view filing)Aug 292 daysPolewaczyk James FExecutive Vice PresidentSSale−22.9K$510.56−$11.7M−69.5%10.0K after6 lots
Aug 17, 2023 (view filing)Aug 152 daysAyers Jonathan WDirectorSSale−492$0.00$0−0.4%135.5K after
Aug 7, 2023 (view filing)Aug 34 daysLane MichaelExecutive Vice PresidentSSale−16.0K$510.00−$8.17M−79.9%4.03K after
May 22, 2023 (view filing)May 18-194 daysAyers Jonathan WDirectorSSale−20.0K$490.29−$9.81M−12.7%137.0K after16 lots
May 8, 2023 (view filing)May 53 daysSzostak M AnneDirectorSSale−2.00K$474.89−$949.8K−29.9%4.70K after3 lots
May 8, 2023 (view filing)May 53 daysLane MichaelExecutive Vice PresidentSSale−1.00K$484.00−$484.0K−19.9%4.02K after
May 5, 2023 (view filing)May 41 dayVandebroek Sophie V.DirectorSSale−2.19K$469.02−$1.03M−71.5%872 after
Feb 17, 2023 (view filing)Feb 161 dayJunius Daniel MDirectorSSale−2.19K$511.68−$1.12M−42.3%2.98K after
Feb 17, 2023 (view filing)Feb 15-162 daysTurner Kathy VSenior Vice PresidentSSale−1.01K$510.08−$515.2K−12.0%7.38K after2 lots
Feb 16, 2023 (view filing)Feb 142 daysTurner Kathy VSenior Vice PresidentSSale−2.00K$504.59−$1.01M−21.3%7.38K after4 lots
Feb 13, 2023 (view filing)Feb 94 daysTurner Kathy VSenior Vice PresidentSSale−1.00K$505.04−$505.0K−12.6%6.94K after
Dec 7, 2022 (view filing)Dec 52 daysJunius Daniel MDirectorSSale−3.05K$424.91−$1.29M−50.6%2.97K after
Dec 6, 2022 (view filing)Dec 24 daysSzostak M AnneDirectorSSale−740$428.55−$317.1K−37.0%1.26K after
Dec 5, 2022 (view filing)Dec 14 daysTurner Kathy VSenior Vice PresidentSSale−3.00K$436.00−$1.31M−30.2%6.92K after
Nov 16, 2022 (view filing)Nov 142 daysMazelsky Jonathan JayPresident & CEOSSale−10.5K$434.47−$4.56M−12.9%70.8K after4 lots
Nov 14, 2022 (view filing)Nov 10-114 daysTurner Kathy VSenior Vice PresidentSSale−13.9K$426.70−$5.92M−66.7%6.92K after6 lots
Nov 9, 2022 (view filing)Nov 72 daysMazelsky Jonathan JayPresident & CEOSSale−13.2K$382.49−$5.06M−17.5%62.3K after7 lots
Feb 17, 2022 (view filing)Feb 152 daysAyers Jonathan WDirectorSSale−250$509.70−$127.4K0.0%629.5K after