Idexx Laboratories (IDXX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-12 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: IDEXX LABORATORIES INC /DE (IDXX) CIK: 0000874716 --- Reporting Owner --- Name: Claflin Bruce L. CIK: 0001403694 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Non-Qualified Stock Option (right-to-buy) Date: 2026-05-12 | Code: A (Grant or award) Shares: +525 | Price: $0.00 Exercisable: N/A | Expires: 2036-05-11 Shares Owned After: 525 | Ownership: D (Direct) Footnotes: [F1] Grant of option to buy shares of Issuer common stock that vest in one installment on the one year anniversary of the date of grant or on the date of the 2027 annual meeting of shareholders, whichever event is earlier. [Transaction #2] Security: Deferred Stock Unit Date: 2026-05-12 | Code: A (Grant or award) Shares: +234 | Price: $0.00 Shares Owned After: 1,354 | Ownership: D (Direct) Footnotes: [F2] Each deferred stock unit represents a contingent right to receive one share of Issuer 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 2027 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] Each deferred stock unit represents a contingent right to receive one share of Issuer 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 2027 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] Each deferred stock unit represents a contingent right to receive one share of Issuer 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 2027 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. --- Footnotes (Complete Index) --- F1: Grant of option to buy shares of Issuer common stock that vest in one installment on the one year anniversary of the date of grant or on the date of the 2027 annual meeting of shareholders, whichever event is earlier. F2: Each deferred stock unit represents a contingent right to receive one share of Issuer 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 2027 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. --- Signature --- /s/ /s/ Lily J. Lu, Attorney-in-Fact for Bruce L. Claflin (2026-05-14)