X0306 4 2022-05-11 0 0000874716 IDEXX LABORATORIES INC /DE IDXX 0001184149 AYERS JONATHAN W ONE IDEXX DRIVE WESTBROOK ME 04092 1 0 0 0 Common Stock 2022-05-11 4 M 0 224 0 A 630420 D Common Stock 10000 I by Ayers Family Trust 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 344 568 D Restricted Stock Unit 2022-05-11 4 M 0 224 D Common Stock 224 344 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. Each restricted stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These restricted stock units vested in in one installment on the one year anniversary of the date of grant or on the date of the 2022 annual meeting of shareholders, whichever event was earlier. Not applicable. /s/ Lily J. Lu, Attorney-in-Fact for Jonathan W. Ayers 2022-05-13