Charles River (CRL)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-10 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL) CIK: 0001100682 --- Reporting Owner --- Name: FOSTER JAMES C CIK: 0001141722 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-10 | Code: M (Exercise of derivative) Shares: +28,733 | Price: $179.66 Total Value: $5,162,170.78 Shares Owned After: 60,329 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-08-10 | Code: S (Open market sale) Shares: -28,733 | Price: $275.00 Total Value: $7,901,575.00 Shares Owned After: 31,596 | Ownership: D (Direct) Footnotes: [F1] This exercise and sale occurred pursuant to a Rule 10b5-1 Trading Plan that was initially adopted on March 6, 2026. --- Derivative Transactions --- [Transaction #1] Security: Stock Options (Right to Buy) Date: 2026-08-10 | Code: M (Exercise of derivative) Shares: -28,733 | Price: $0.00 Exercisable: N/A | Expires: 2030-05-29 Shares Owned After: 0 | Ownership: D (Direct) --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) [Holding #2] Security: Common Stock Ownership: I (Indirect) [Holding #3] Security: Common Stock Ownership: I (Indirect) [Holding #4] Security: Common Stock Ownership: I (Indirect) [Holding #5] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: This exercise and sale occurred pursuant to a Rule 10b5-1 Trading Plan that was initially adopted on March 6, 2026. --- Signature --- /s/ /s/ James C. Foster (2026-08-11)