Idexx Laboratories (IDXX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-04 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: 2026-09-04 | Code: M (Exercise of derivative) Shares: +2,203 | Price: $114.17 Total Value: $251,516.51 Shares Owned After: 11,771 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-09-04 | Code: S (Open market sale) Shares: -2,203 | Price: $532.08 Total Value: $1,172,177.97 Shares Owned After: 9,568 | Ownership: D (Direct) Footnotes: [F1] Represents the weighted average price of the shares sold ranging from a low of $531.88 to a high of $532.14 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. --- Derivative Transactions --- [Transaction #1] Security: Non-Qualified Stock Option (right-to-buy) Date: 2026-09-04 | Code: M (Exercise of derivative) Shares: -2,203 Exercise Price: $114.17 Exercisable: N/A | Expires: 2026-11-30 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F3] Not applicable. [F2] Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that vested in one installment on May 3, 2017. --- Footnotes (Complete Index) --- F1: Represents the weighted average price of the shares sold ranging from a low of $531.88 to a high of $532.14 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: Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that vested in one installment on May 3, 2017. F3: Not applicable. --- Signature --- /s/ /s/ Lily J. Lu, Attorney-in-Fact for Lawrence D. Kingsley (2026-09-09)