Idexx Laboratories (IDXX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-07 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: IDEXX LABORATORIES INC /DE (IDXX) CIK: 0000874716 --- Reporting Owner --- Name: Kingsley Lawrence D CIK: 0001301427 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-07 | Code: M (Exercise of derivative) Shares: +257 | Price: $0.00 Shares Owned After: 9,486 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-05-07 | Code: M (Exercise of derivative) Shares: +82 | Price: $0.00 Shares Owned After: 9,568 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Unit Date: 2026-05-07 | Code: M (Exercise of derivative) Shares: -257 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. [F2] Not applicable. [F1] Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. [F1] Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. [Transaction #2] Security: Restricted Stock Unit Date: 2026-05-07 | Code: M (Exercise of derivative) Shares: -82 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. [F2] Not applicable. [F1] Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. [F1] Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. --- Footnotes (Complete Index) --- F1: Each restricted stock unit represents a contingent right to receive one share of Issuer common stock that vested in one installment on May 7, 2026. F2: Not applicable. --- Signature --- /s/ /s/ Lily J. Lu, Attorney-in-Fact for Lawrence D. Kingsley (2026-05-11)