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: Vandebroek Sophie V. CIK: 0001442078 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: Restricted Stock Unit Date: 2026-05-12 | Code: A (Grant or award) Shares: +234 | Price: $0.00 Shares Owned After: 234 | Ownership: D (Direct) Footnotes: [F2] Each restricted stock unit represents a contingent right to receive one share of Issuer 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 2027 annual meeting of shareholders, whichever event is earlier. [F2] Each restricted stock unit represents a contingent right to receive one share of Issuer 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 2027 annual meeting of shareholders, whichever event is earlier. [F2] Each restricted stock unit represents a contingent right to receive one share of Issuer 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 2027 annual meeting of shareholders, whichever event is earlier. --- 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 restricted stock unit represents a contingent right to receive one share of Issuer 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 2027 annual meeting of shareholders, whichever event is earlier. --- Signature --- /s/ /s/ Lily J. Lu, Attorney-in-Fact for Sophie V. Vandebroek (2026-05-14)