X0306 4 2022-02-18 0 0000874716 IDEXX LABORATORIES INC /DE IDXX 0001740719 Turner Kathy V C/O IDEXX LABORATORIES, INC. ONE IDEXX DRIVE WESTBROOK ME 04092 0 1 0 0 Senior Vice President Common Stock 2022-02-18 4 M 0 1474 67.85 A 6180.3869 D Common Stock 2022-02-18 4 M 0 706 141.60 A 6886.3869 D Common Stock 100 I by spouse Incentive Stock Option (right-to-buy) 67.85 2022-02-18 4 M 0 1474 D 2026-02-13 Common Stock 1474 0 D Incentive Stock Option (right-to-buy) 141.60 2022-02-18 4 M 0 706 D 2027-02-13 Common Stock 706 0 D The reporting person disclaims beneficial interest of the shares of common stock held by her spouse except to the extent of her pecuniary interest therein. Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that became exercisable in one installment on February 14, 2021. Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that became exercisable in one installment on February 14, 2022. Not applicable. /s/ Lily J. Lu, Attorney-in-Fact for Kathy V. Turner 2022-02-22