IDXX

SEC source: 0000874716-25-000102 · wk-form4_1748984404.xml · derivative · entry 3

Johnson Michael Perkins · CIK 0001917747 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,382 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.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock and vested in one installment on June 1, 2025.

F4 · price: Not applicable.

F3 · derivative.exercise_date: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock and vested in one installment on June 1, 2025.

F3 · derivative.expiration_date: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock and vested in one installment on June 1, 2025.

SEC source: 0000874716-25-000102 · wk-form4_1748984404.xml · nonDerivative · entry 2

Johnson Michael Perkins · CIK 0001917747 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,365.3419

F2 · price: Closing price of Issuer common stock on the Nasdaq market on May 30, 2025.

SEC source: 0000874716-25-000102 · wk-form4_1748984404.xml · nonDerivative · entry 1

Johnson Michael Perkins · CIK 0001917747 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,864.3419

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 15 shares purchased under the Issuer Employee Stock Purchase Plan on March 31, 2025.

SEC source: 0000874716-25-000094 · wk-form4_1748034012.xml · derivative · entry 4

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,046 shares

Expires 2027-05-02

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.

F4 · price: Not applicable.

F3 · 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 2018 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000094 · wk-form4_1748034012.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: 1,801

F1 · price: Represents the weighted average price of the shares sold ranging from a low of $511.81 to a high of $512.61 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 held by the Trust.

SEC source: 0000874716-25-000094 · wk-form4_1748034012.xml · nonDerivative · entry 2

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 262

SEC source: 0000874716-25-000094 · wk-form4_1748034012.xml · nonDerivative · entry 1

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,308

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: 0000874716-25-000090 · wk-form4_1747256407.xml · derivative · entry 5

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,279 shares

Expires 2030-05-05

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_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 2021 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000090 · wk-form4_1747256407.xml · derivative · entry 4

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,404 shares

Expires 2029-05-07

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_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 2020 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000090 · wk-form4_1747256407.xml · nonDerivative · entry 3

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,304

SEC source: 0000874716-25-000090 · wk-form4_1747256407.xml · nonDerivative · entry 2

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,987

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: 0000874716-25-000090 · wk-form4_1747256407.xml · nonDerivative · entry 1

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,708

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: 0000874716-25-000088 · wk-form4_1747170010.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 · 1,279 shares

Expires 2030-05-05

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 · price: Not applicable.

F1 · 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 2021 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000088 · wk-form4_1747170010.xml · nonDerivative · entry 2

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,167

SEC source: 0000874716-25-000088 · wk-form4_1747170010.xml · nonDerivative · entry 1

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,446

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: 0000874716-25-000083 · wk-form4_1746745302.xml · derivative · entry 5

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

F3 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F3 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F3 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

SEC source: 0000874716-25-000083 · wk-form4_1746745302.xml · derivative · entry 4

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

F2 · 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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000082 · wk-form4_1746745291.xml · derivative · entry 5

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

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

SEC source: 0000874716-25-000082 · wk-form4_1746745291.xml · derivative · entry 4

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

F3 · 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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000081 · wk-form4_1746745281.xml · derivative · entry 2

SAMAD SAM · CIK 0001694295 · 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 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 2026 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 2026 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 2026 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: 0000874716-25-000081 · wk-form4_1746745281.xml · derivative · entry 1

SAMAD SAM · CIK 0001694295 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000080 · wk-form4_1746745269.xml · derivative · entry 8

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82

Underlying: Common Stock · 82 shares

Expires not disclosed

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F2 · shares: Additional grant made as Independent Non-Executive Board Chair.

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

SEC source: 0000874716-25-000080 · wk-form4_1746745269.xml · derivative · entry 7

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

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F4 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

SEC source: 0000874716-25-000080 · wk-form4_1746745269.xml · derivative · entry 6

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 192

Underlying: Common Stock · 192 shares

Expires 2035-05-06

F2 · shares: Additional grant made as Independent Non-Executive Board Chair.

F3 · 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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000080 · wk-form4_1746745269.xml · derivative · entry 5

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

F3 · 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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000079 · wk-form4_1746745258.xml · derivative · entry 4

JUNIUS DANIEL M · CIK 0001094159 · 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. These restricted stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F3 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

F3 · 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2026 annual meeting of shareholders, whichever event earlier.

SEC source: 0000874716-25-000079 · wk-form4_1746745258.xml · derivative · entry 3

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

F2 · 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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000078 · wk-form4_1746745246.xml · derivative · entry 4

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

F3 · 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 2026 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.

F3 · 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 2026 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.

F3 · 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 2026 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: 0000874716-25-000078 · wk-form4_1746745246.xml · derivative · entry 3

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

F2 · 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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000076 · wk-form4_1746745224.xml · derivative · entry 2

Britt Irene Chang · CIK 0001502314 · 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 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 2026 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 2026 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 2026 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: 0000874716-25-000076 · wk-form4_1746745224.xml · derivative · entry 1

Britt Irene Chang · CIK 0001502314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

F1 · security: 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 2026 annual meeting of shareholders, whichever event is earlier.

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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000077 · wk-form4_1746745236.xml · derivative · entry 2

Claflin Bruce L. · CIK 0001403694 · 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 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 2026 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 2026 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 2026 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: 0000874716-25-000077 · wk-form4_1746745236.xml · derivative · entry 1

Claflin Bruce L. · CIK 0001403694 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 600

Underlying: Common Stock · 600 shares

Expires 2035-05-06

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 2026 annual meeting of shareholders, whichever event is earlier.

SEC source: 0000874716-25-000083 · wk-form4_1746745302.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 · 262 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

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 one installment on the one year anniversary of the date of grant or on the date of the 2025 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000083 · wk-form4_1746745302.xml · nonDerivative · entry 1

Vandebroek Sophie V. · CIK 0001442078 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,167

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: 0000874716-25-000082 · wk-form4_1746745291.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 · 262 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

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 one installment on the one year anniversary of the date of grant or on the date of the 2025 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000082 · wk-form4_1746745291.xml · nonDerivative · entry 1

SZOSTAK M ANNE · CIK 0001094176 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 262

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: 0000874716-25-000080 · wk-form4_1746745269.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 · 84 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. Restricted stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

F2 · shares: Additional grant made as Independent Non-Executive Board Chair.

F1 · 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 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. Restricted stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000080 · wk-form4_1746745269.xml · derivative · entry 3

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 262 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. Restricted stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

F1 · 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 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. Restricted stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000080 · wk-form4_1746745269.xml · nonDerivative · entry 2

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,229

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: 0000874716-25-000080 · wk-form4_1746745269.xml · nonDerivative · entry 1

Kingsley Lawrence D · CIK 0001301427 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,145

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: 0000874716-25-000079 · wk-form4_1746745258.xml · derivative · entry 2

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 262 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 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 vest in one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000079 · wk-form4_1746745258.xml · nonDerivative · entry 1

JUNIUS DANIEL M · CIK 0001094159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,304

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: 0000874716-25-000078 · wk-form4_1746745246.xml · derivative · entry 2

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 262 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

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 one installment on the one year anniversary of the date of grant or on the date of the 2025 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 one installment on the one year anniversary of the date of grant or on the date of the 2025 annual meeting of shareholders, whichever event was earlier.

SEC source: 0000874716-25-000078 · wk-form4_1746745246.xml · nonDerivative · entry 1

ESSIG STUART · CIK 0001187574 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,236

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: 0000874716-25-000030 · wk-form4_1739933040.xml · derivative · entry 12

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 652

Underlying: Common Stock · 218 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.

F8 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning on February 14, 2025.

F8 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning on February 14, 2025.

F8 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning on February 14, 2025.

SEC source: 0000874716-25-000030 · wk-form4_1739933040.xml · derivative · entry 11

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 352

Underlying: Common Stock · 176 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.

F7 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2024.

F7 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2024.

F7 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2024.

SEC source: 0000874716-25-000030 · wk-form4_1739933040.xml · derivative · entry 10

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173

Underlying: Common Stock · 173 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.

F6 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2023.

F6 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2023.

F6 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vests in four annual installments, beginning February 14, 2023.

SEC source: 0000874716-25-000030 · wk-form4_1739933040.xml · derivative · entry 9

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 137 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.

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Issuer common stock and vested in four annual installments, beginning February 14, 2022.

F5 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vested in four annual installments, beginning February 14, 2022.

F5 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of Issuer common stock and vested in four annual installments, beginning February 14, 2022.

SEC source: 0000874716-25-000030 · wk-form4_1739933040.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,126.9449