The Filings Report

IDEXX Laboratories insider trading

IDXXfinancial statementsForm 4 filings on EDGAR231 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at IDEXX Laboratories bought $0 of stock in the open market, and 1 sold $1M. Officers and directors accounted for $0 of purchases and $1M of sales. The last reported transaction was an option exercise by Kingsley Lawrence D on September 4, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through September 9, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

IDXX daily priceSplit-adjusted prices in US dollars

Bought $0Sold $1MAug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $583.75 · H $586.00 · L $540.61 · C $551.21Bought $0 (0)Sold $0 (0)
$493$528$562$597$6322026-08-04: open $602.33, high $624.15, low $584.26, close $588.092026-08-05: open $590.22, high $604.14, low $578.50, close $584.782026-08-06: open $585.88, high $591.80, low $574.99, close $590.002026-08-07: open $587.74, high $600.84, low $583.44, close $586.672026-08-10: open $581.90, high $602.00, low $579.48, close $595.762026-08-11: open $594.59, high $598.89, low $586.01, close $586.642026-08-12: open $580.00, high $584.15, low $568.22, close $570.582026-08-13: open $576.33, high $577.09, low $557.39, close $566.932026-08-14: open $569.14, high $569.14, low $549.19, close $550.962026-08-17: open $556.39, high $556.39, low $538.20, close $546.092026-08-18: open $553.73, high $559.46, low $549.75, close $553.322026-08-19: open $556.78, high $575.56, low $555.00, close $562.202026-08-20: open $562.05, high $563.13, low $543.60, close $545.862026-08-21: open $550.14, high $557.66, low $544.88, close $556.932026-08-24: open $559.21, high $562.19, low $554.23, close $559.512026-08-25: open $555.50, high $558.06, low $549.42, close $550.012026-08-26: open $544.13, high $555.71, low $544.13, close $553.442026-08-27: open $549.73, high $553.11, low $542.01, close $545.082026-08-28: open $547.81, high $556.01, low $545.48, close $554.992026-08-31: open $547.68, high $561.24, low $543.60, close $556.692026-09-01: open $555.95, high $555.95, low $541.53, close $545.162026-09-02: open $546.73, high $558.42, low $537.31, close $538.992026-09-03: open $542.02, high $548.85, low $527.74, close $529.292026-09-04: open $522.05, high $536.09, low $522.05, close $535.382026-09-08: open $528.42, high $529.02, low $519.07, close $520.212026-09-09: open $517.00, high $522.49, low $511.16, close $515.152026-09-10: open $508.44, high $514.30, low $504.79, close $506.532026-09-11: open $509.88, high $511.15, low $500.61, close $504.702026-09-14: open $510.83, high $515.48, low $505.02, close $509.602026-09-15: open $509.56, high $516.02, low $502.40, close $510.732026-09-16: open $511.56, high $520.41, low $509.02, close $513.622026-09-17: open $514.33, high $514.37, low $501.98, close $506.482026-09-18: open $506.48, high $516.43, low $505.21, close $511.652026-09-21: open $511.65, high $518.96, low $506.22, close $515.302026-09-22: open $519.27, high $523.95, low $513.01, close $521.502026-09-23: open $517.20, high $523.22, low $517.15, close $522.022026-09-24: open $520.88, high $524.12, low $511.73, close $513.392026-09-25: open $510.94, high $520.16, low $507.49, close $519.262026-09-28: open $516.53, high $530.15, low $515.34, close $529.062026-09-29: open $530.10, high $536.84, low $522.11, close $533.442026-09-30: open $531.09, high $531.11, low $521.78, close $522.192026-10-01: open $521.58, high $525.96, low $517.06, close $517.752026-10-02: open $523.50, high $524.02, low $516.02, close $518.392026-10-05: open $516.57, high $528.69, low $513.48, close $527.072026-10-06: open $529.14, high $531.38, low $512.54, close $515.412026-10-07: open $513.31, high $515.17, low $501.17, close $506.672026-10-08: open $506.67, high $514.51, low $506.12, close $513.142026-10-09: open $513.67, high $522.02, low $513.10, close $518.002026-10-12: open $518.00, high $525.76, low $515.13, close $523.942026-10-13: open $525.73, high $528.49, low $514.73, close $520.312026-10-14: open $520.20, high $529.63, low $518.84, close $529.012026-10-15: open $538.34, high $547.83, low $535.29, close $547.182026-10-16: open $553.60, high $566.55, low $552.62, close $560.362026-10-19: open $559.28, high $563.95, low $553.52, close $555.802026-10-20: open $559.14, high $561.83, low $552.78, close $557.932026-10-21: open $549.70, high $560.63, low $547.48, close $553.482026-10-22: open $562.01, high $568.67, low $558.39, close $566.762026-10-23: open $564.80, high $569.56, low $558.29, close $560.382026-10-26: open $564.23, high $571.75, low $557.94, close $570.212026-10-27: open $563.23, high $567.55, low $559.03, close $561.252026-10-28: open $556.78, high $567.77, low $555.21, close $562.912026-10-29: open $570.17, high $576.17, low $568.01, close $575.982026-10-30: open $583.75, high $586.00, low $540.61, close $551.21Insider purchases / sales · USD$2M$0−$2M2026-09-04: 0 purchases ($0), 1 sales ($1M)Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

231 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Sep 4, 2026Kingsley Lawrence DDirectoroption exercise2,203$114.17$252K11,771Sep 9, 2026
Sep 4, 2026Kingsley Lawrence DDirectoropen-market sale2,203$532.08$1M9,568Sep 9, 2026
Aug 20, 2026Emerson AndrewEVP, CFO and Treasureroption exercise265$178.26$47K4,507Aug 24, 2026
Aug 20, 2026Emerson AndrewEVP, CFO and Treasurertax withholding86$0.00—4,421Aug 24, 2026
Jul 30, 2026Hooley Joseph LDirectoraward49$558.80$27K325Aug 3, 2026
Jun 1, 2026Fennell GeorgeExecutive Vice Presidentoption exercise639$0.00—10,717Jun 2, 2026
Jun 1, 2026Fennell GeorgeExecutive Vice Presidenttax withholding284$566.79$161K10,433Jun 2, 2026
May 7, 2026Vandebroek Sophie V.Directoroption exercise257$0.00—905May 11, 2026
May 7, 2026Szostak M AnneDirectoroption exercise257$0.00—519May 11, 2026
May 7, 2026Peacock KarenDirectoroption exercise101$0.00—102May 11, 2026
May 7, 2026Kingsley Lawrence DDirectoroption exercise257$0.00—9,486May 11, 2026
May 7, 2026Kingsley Lawrence DDirectoroption exercise82$0.00—9,568May 11, 2026
May 7, 2026Junius Daniel MDirectoroption exercise257$0.00—3,561May 11, 2026
May 7, 2026Hooley Joseph LDirectoroption exercise158$0.00—276May 11, 2026
Apr 30, 2026Hooley Joseph LDirectoraward43$560.80$24K118May 4, 2026
Mar 3, 2026Underberg Sharon E.EVP, GC & Corporate Secretaryoption exercise197$505.53$100K7,138Mar 5, 2026
Mar 3, 2026Hunt NimrataExecutive Vice Presidentopen-market sale1,758$634.57$1M18,141Mar 5, 2026
Feb 27, 2026Mazelsky Jonathan JayPresident and CEO, Directoroption exercise197$505.53$100K83,803Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale2,860$657.84$2M94,914Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,095$651.49$713K104,556Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,281$650.67$834K105,651Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoroption exercise23,326$141.60$3M106,932Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale2,589$663.04$2M83,606Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,000$662.16$662K86,195Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,200$661.10$793K87,195Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale2,859$659.75$2M88,395Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,669$652.49$1M102,887Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,171$653.68$765K101,716Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,111$654.63$727K100,605Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,488$655.85$976K99,117Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale1,343$656.85$882K97,774Mar 2, 2026
Feb 26, 2026Mazelsky Jonathan JayPresident and CEO, Directoropen-market sale3,660$658.92$2M91,254Mar 2, 2026
Feb 26, 2026Hunt NimrataExecutive Vice Presidentopen-market sale2,693$661.54$2M19,899Feb 27, 2026
Feb 19, 2026Erickson Michael GExecutive Vice Presidentoption exercise197$505.53$100K15,092Feb 19, 2026
Feb 19, 2026Erickson Michael GExecutive Vice Presidentoption exercise183$544.08$100K14,895Feb 19, 2026
Feb 19, 2026Erickson Michael GExecutive Vice Presidentoption exercise719$141.60$102K13,412Feb 19, 2026
Feb 19, 2026Erickson Michael GExecutive Vice Presidentoption exercise817$178.26$146K14,229Feb 19, 2026
Feb 19, 2026Erickson Michael GExecutive Vice Presidentoption exercise483$206.94$100K14,712Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentoption exercise1,191$141.60$169K13,884Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentoption exercise4,180$178.26$745K18,064Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentopen-market sale456$623.76$284K17,608Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentopen-market sale204$625.24$128K17,404Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentopen-market sale1,288$626.26$807K16,116Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentopen-market sale2,694$628.22$2M13,422Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentopen-market sale689$629.09$433K12,733Feb 19, 2026
Feb 17, 2026Erickson Michael GExecutive Vice Presidentopen-market sale40$629.86$25K12,693Feb 19, 2026
Feb 17, 2026Vandebroek Sophie V.Directoroption exercise945$333.90$316K2,112Feb 19, 2026
Feb 17, 2026Vandebroek Sophie V.Directoropen-market sale945$628.65$594K1,167Feb 19, 2026
Feb 17, 2026Vandebroek Sophie V.Directoropen-market sale519$628.56$326K648Feb 19, 2026
Feb 14, 2026Underberg Sharon E.EVP, GC & Corporate Secretaryoption exercise173$0.00—6,533Feb 17, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Mazelsky Jonathan JayPresident and CEO, DirectorFeb 27, 2026option exercise83,803—$15M (13)0 of 13
Hunt NimrataExecutive Vice PresidentMar 3, 2026open-market sale18,141—$10M (6)0 of 6
Fennell GeorgeExecutive Vice PresidentJun 1, 2026option exercise10,717—$7M (8)0 of 8
Erickson Michael GExecutive Vice PresidentFeb 19, 2026option exercise15,092—$3M (6)0 of 6
Kingsley Lawrence DDirectorSep 4, 2026option exercise11,771—$1M (1)0 of 1
Vandebroek Sophie V.DirectorMay 7, 2026option exercise905—$920K (2)0 of 2
Lane MichaelExecutive Vice PresidentFeb 14, 2026option exercise7,357———
Underberg Sharon E.EVP, GC & Corporate SecretaryMar 3, 2026option exercise7,138———
Smith Martin AlexanderExecutive Vice PresidentFeb 14, 2026option exercise2,459———
Schreck MichaelExecutive Vice PresidentFeb 14, 2026tax withholding3,089———
Emerson AndrewEVP, CFO and TreasurerAug 20, 2026option exercise4,507———
Szostak M AnneDirectorMay 7, 2026option exercise519———
Johnson Michael PerkinsExecutive Vice PresidentFeb 14, 2026option exercise2,755———
Hooley Joseph LDirectorJul 30, 2026award325———
Junius Daniel MDirectorMay 7, 2026option exercise3,561———
Mckeon Brian PEVP, CFO and TreasurerFeb 14, 2025option exercise32,119———
Peacock KarenDirectorMay 7, 2026option exercise102———
Essig StuartDirectorMay 6, 2025option exercise2,236———

Questions

Are IDEXX Laboratories insiders buying or selling?

Over the twelve months to November 1, 2026, 6 insiders at IDEXX Laboratories sold $38M of stock in the open market, all by officers and directors, and no insider bought. Net, insiders sold $38M. Only open-market purchases and sales are counted.

Who sold the most IDEXX Laboratories stock in the last year?

Mazelsky Jonathan Jay (President and CEO, Director) sold $15M in 13 open-market sales over the twelve months to November 1, 2026.

Do IDEXX Laboratories executives sell under 10b5-1 plans?

0 of the 36 open-market sales in the last twelve months (0%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on IDEXX Laboratories

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.