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IDEXX Laboratories Inc. planned insider sales

In the last twelve months insiders at IDEXX Laboratories Inc. filed 12 Form 144 notices of planned sales, 88,029 shares worth $58.7 million at the time of filing, from 10 sellers. The latest, filed 4 November 2026: Junius Daniel M (director), 500 shares worth $345,835, planned for around 4 November 2026 through Fidelity Brokerage Services LLC.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
4 November 2026Junius Daniel MDirector500$345,8354 November 20261,200 shares from 4 November 2026Fidelity Brokerage Services LLCOpen Market PurchaseForm 144
4 November 2026Michael J LaneOfficer3,979$2.7 million4 November 20263,979 shares from 4 November 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Exercised Shares; Restricted StockForm 144
4 November 2026Sharon E UnderbergOfficer8,906$6.1 million4 November 20268,906 shares from 4 November 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
4 November 2026Jonathan J MazelskyOfficer, Director25,140$17.7 million4 November 202625,140 shares from 4 November 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
4 September 2026Lawrence D KingsleyDirector2,203$1.2 million4 September 20262,203 shares from 4 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
20 May 2026Margaret Anne SzostakDirector1,344$744,01220 May 2026No matching Form 4 saleGoldman Sachs & Co. LLCRestricted Stock UnitsForm 144
3 March 2026Nimrata K HuntOfficer1,758$1.1 million3 March 20261,758 shares from 3 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercised SharesForm 144
26 February 2026Jonathan J MazelskyOfficer, Director23,326$15.3 million26 February 202623,326 shares from 26 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
25 February 2026Nimrata K HuntOfficer2,693$1.8 million25 February 20262,693 shares from 26 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercised SharesForm 144
17 February 2026Sophie V VandebroekDirector1,464$920,29317 February 20261,464 shares from 17 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock; Stock Option ExerciseForm 144
17 February 2026Michael G EricksonOfficer5,371$3.4 million17 February 20265,371 shares from 17 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
10 February 2026George FennellOfficer11,345$7.3 million10 February 202611,345 shares from 10 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?