IDXX

SEC source: 0000874716-23-000083 · wf-form4_168453022946039.xml · derivative · entry 2

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000083 · wf-form4_168453022946039.xml · derivative · entry 1

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000082 · wf-form4_168453021084091.xml · derivative · entry 2

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000082 · wf-form4_168453021084091.xml · derivative · entry 1

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000081 · wf-form4_168453019248270.xml · derivative · entry 2

SAMAD SAM · CIK 0001694295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 601

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · price: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

SEC source: 0000874716-23-000081 · wf-form4_168453019248270.xml · derivative · entry 1

SAMAD SAM · CIK 0001694295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000080 · wf-form4_168453017782121.xml · derivative · entry 4

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 339

Underlying: Common Stock · 82 shares

Expires not disclosed

F3 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · shares: Additional grant made pursuant to reporting person's role as Non-Executive Board Chair.

F3 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F3 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F3 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000080 · wf-form4_168453017782121.xml · derivative · entry 3

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257

Underlying: Common Stock · 257 shares

Expires not disclosed

F3 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F3 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F3 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F3 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000080 · wf-form4_168453017782121.xml · derivative · entry 2

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 851

Underlying: Common Stock · 206 shares

Expires 2033-05-16

F2 · shares: Additional grant made pursuant to reporting person's role as Non-Executive Board Chair.

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000080 · wf-form4_168453017782121.xml · derivative · entry 1

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000079 · wf-form4_168453013579667.xml · derivative · entry 2

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 601

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · price: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

SEC source: 0000874716-23-000079 · wf-form4_168453013579667.xml · derivative · entry 1

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000078 · wf-form4_168453009809122.xml · derivative · entry 2

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000078 · wf-form4_168453009809122.xml · derivative · entry 1

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000077 · wf-form4_168453007408692.xml · derivative · entry 2

COLLINS Asha · CIK 0001832272 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000077 · wf-form4_168453007408692.xml · derivative · entry 1

COLLINS Asha · CIK 0001832272 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000076 · wf-form4_168453002482219.xml · derivative · entry 2

Claflin Bruce L. · CIK 0001403694 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 601

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · price: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · derivative.exercise_date: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

F2 · derivative.expiration_date: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. These deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2024 annual meeting of shareholders, whichever event is earlier, and by default are payable as common stock as soon as practicable following the date of the Director's resignation from the Board of Directors.

SEC source: 0000874716-23-000076 · wf-form4_168453002482219.xml · derivative · entry 1

Claflin Bruce L. · CIK 0001403694 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000075 · wf-form4_168453000585614.xml · derivative · entry 2

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 257

Underlying: Common Stock · 257 shares

Expires not disclosed

F2 · derivative.exercise_price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · price: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

F2 · derivative.expiration_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000075 · wf-form4_168453000585614.xml · derivative · entry 1

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 645

Underlying: Common Stock · 645 shares

Expires 2033-05-16

F1 · derivative.exercise_date: 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 2024 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-23-000062 · wf-form4_168435733418858.xml · nonDerivative · entry 1

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,039

SEC source: 0000874716-23-000057 · wf-form4_168418635262333.xml · derivative · entry 3

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 344 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · price: Not applicable.

F1 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F1 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000057 · wf-form4_168418635262333.xml · nonDerivative · entry 1

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,216

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000056 · wf-form4_168418632750826.xml · derivative · entry 3

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 344 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F3 · price: Not applicable.

F2 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000056 · wf-form4_168418632750826.xml · nonDerivative · entry 1

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,604

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000055 · wf-form4_168418631096535.xml · derivative · entry 4

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 120 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · price: Not applicable.

F1 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F1 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000055 · wf-form4_168418631096535.xml · derivative · entry 3

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120

Underlying: Common Stock · 344 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · price: Not applicable.

F1 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F1 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000055 · wf-form4_168418631096535.xml · nonDerivative · entry 2

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,544

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000055 · wf-form4_168418631096535.xml · nonDerivative · entry 1

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,424

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000054 · wf-form4_168418629068677.xml · derivative · entry 2

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 344 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · price: Not applicable.

F1 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F1 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000054 · wf-form4_168418629068677.xml · nonDerivative · entry 1

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,717

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000053 · wf-form4_168418627523690.xml · derivative · entry 2

COLLINS Asha · CIK 0001832272 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 344 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · price: Not applicable.

F1 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F1 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000053 · wf-form4_168418627523690.xml · nonDerivative · entry 1

COLLINS Asha · CIK 0001832272 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 522

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000052 · wf-form4_168418625435211.xml · derivative · entry 5

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 344 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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 2023 annual meeting of shareholders, whichever event was earlier.

F3 · price: Not applicable.

F2 · derivative.exercise_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

F2 · derivative.expiration_date: 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 2023 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000052 · wf-form4_168418625435211.xml · nonDerivative · entry 2

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,553

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000052 · wf-form4_168418625435211.xml · nonDerivative · entry 1

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,209

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000045 · wf-form4_168383885791613.xml · derivative · entry 5

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 560 shares

Expires 2028-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · price: Not applicable.

F2 · derivative.exercise_date: Grant of option to buy shares of Issuer common stock that became exercisable on the fifth anniversary of the date of grant.

SEC source: 0000874716-23-000045 · wf-form4_168383885791613.xml · nonDerivative · entry 2

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,894

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874716-23-000045 · wf-form4_168383885791613.xml · nonDerivative · entry 1

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,334

SEC source: 0000874716-23-000044 · wf-form4_168357986086502.xml · derivative · entry 2

Underberg Sharon E. · CIK 0001630353 · EVP, GC & Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 483

Underlying: Common Stock · 483 shares

Expires 2029-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · price: Not applicable.

F2 · derivative.exercise_date: Grant of option to buy shares of Issuer common stock that becomes exercisable in five annual installments beginning February 14, 2020.

SEC source: 0000874716-23-000044 · wf-form4_168357986086502.xml · nonDerivative · entry 1

Underberg Sharon E. · CIK 0001630353 · EVP, GC & Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,244.6979

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 14.7030 shares purchased under the Issuer's Employee Stock Purchase Plan on March 31, 2023.

SEC source: 0000874716-23-000043 · wf-form4_168357980705648.xml · nonDerivative · entry 3

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Trust of M. Anne Szostak

Disclosed balance after: 4,700

F4 · price: Represents the weighted average price of the shares sold ranging from a low of $475.84 to a high of $476.31 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F2 · ownership.nature: The reporting person is the settlor of the Trust of M. Anne Szostak ("Trust") and the trustee of the Trust, has power to direct the distribution of Trust assets, and has the power to revoke or amend the Trust. The reporting person has a pecuniary interest in the shares transferred to the Trust.

SEC source: 0000874716-23-000043 · wf-form4_168357980705648.xml · nonDerivative · entry 2

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Trust of M. Anne Szostak

Disclosed balance after: 5,200

F3 · price: Represents the weighted average price of the shares sold ranging from a low of $474.67 to a high of $475.66 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F2 · ownership.nature: The reporting person is the settlor of the Trust of M. Anne Szostak ("Trust") and the trustee of the Trust, has power to direct the distribution of Trust assets, and has the power to revoke or amend the Trust. The reporting person has a pecuniary interest in the shares transferred to the Trust.

SEC source: 0000874716-23-000043 · wf-form4_168357980705648.xml · nonDerivative · entry 1

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Trust of M. Anne Szostak

Disclosed balance after: 6,000

F1 · price: Represents the weighted average price of the shares sold ranging from a low of $473.17 to a high of $474.13 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price.

F2 · ownership.nature: The reporting person is the settlor of the Trust of M. Anne Szostak ("Trust") and the trustee of the Trust, has power to direct the distribution of Trust assets, and has the power to revoke or amend the Trust. The reporting person has a pecuniary interest in the shares transferred to the Trust.

SEC source: 0000874716-23-000042 · wf-form4_168357975138231.xml · derivative · entry 3

MCKEON BRIAN P · CIK 0001219445 · EVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 560 shares

Expires 2028-02-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · price: Not applicable.

F2 · derivative.exercise_date: Grant of option to buy shares of Issuer common stock that became exercisable on the fifth anniversary of the date of grant.

SEC source: 0000874716-23-000042 · wf-form4_168357975138231.xml · nonDerivative · entry 1

MCKEON BRIAN P · CIK 0001219445 · EVP, CFO and Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,605.3456

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 14.7030 shares purchased under the Issuer's Employee Stock Purchase Plan on March 31, 2023.

SEC source: 0000874716-23-000041 · wf-form4_168357967838709.xml · nonDerivative · entry 1

Lane Michael · CIK 0001740689 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,021.9875

F1 · balance_after: Includes 14.7030 shares purchased under the Issuer's Employee Stock Purchase Plan on March 31, 2023.

SEC source: 0000874716-23-000040 · wf-form4_168357960657042.xml · nonDerivative · entry 2

AYERS JONATHAN W · CIK 0001184149 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,019

SEC source: 0000874716-23-000039 · wf-form4_168332406840001.xml · derivative · entry 4

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,187 shares

Expires 2028-05-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · price: Not applicable.

F2 · derivative.exercise_date: Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that vested in one installment on the one year anniversary of the date of grant or on the date of the 2019 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-23-000039 · wf-form4_168332406840001.xml · nonDerivative · entry 3

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Sophie V. Vandebroek Revocable Trust

Disclosed balance after: 8,173