X0306 4 2022-05-11 0 0000874716 IDEXX LABORATORIES INC /DE IDXX 0001832272 COLLINS Asha ONE IDEXX DRIVE WESTBROOK ME 04092 1 0 0 0 Non-Qualified Stock Option (right-to-buy) 333.90 2022-05-11 4 A 0 945 A 2032-05-10 Common Stock 945 945 D Restricted Stock Unit 2022-05-11 4 A 0 344 A Common Stock 344 344 D Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that vest in one installment on the one year anniversary of the date of grant or on the date of the 2023 annual meeting of shareholders, whichever event is earlier. Each restricted stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. Restricted stock units vest in in one installment on the one year anniversary of the date of grant or on the date of the 2023 annual meeting of shareholders, whichever event is earlier. Not applicable. /s/ Lily J. Lu, Attorney-in-Fact for Asha Collins 2022-05-13