0001127602-25-014711.txt : 20250516 0001127602-25-014711.hdr.sgml : 20250516 20250516162933 ACCESSION NUMBER: 0001127602-25-014711 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250515 FILED AS OF DATE: 20250516 DATE AS OF CHANGE: 20250516 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MASSARO GEORGE CENTRAL INDEX KEY: 0001221496 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-15943 FILM NUMBER: 25959726 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: CHARLES RIVER LABORATORIES INTERNATIONAL, INC. CENTRAL INDEX KEY: 0001100682 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731] ORGANIZATION NAME: 08 Industrial Applications and Services EIN: 061397316 FISCAL YEAR END: 1227 BUSINESS ADDRESS: STREET 1: 251 BALLARDVALE ST CITY: WILMINGTON STATE: MA ZIP: 01887 BUSINESS PHONE: 781-222-6000 MAIL ADDRESS: STREET 1: 251 BALLARDVALE ST CITY: WILMINGTON STATE: MA ZIP: 01887 FORMER COMPANY: FORMER CONFORMED NAME: CHARLES RIVER LABORATORIES INTERNATIONAL INC DATE OF NAME CHANGE: 20000605 FORMER COMPANY: FORMER CONFORMED NAME: CHARLES RIVER LABORATORIES HOLDINGS INC DATE OF NAME CHANGE: 19991208 4 1 form4.xml PRIMARY DOCUMENT X0508 4 2025-05-15 0001100682 CHARLES RIVER LABORATORIES INTERNATIONAL, INC. CRL 0001221496 MASSARO GEORGE C/O CHARLES RIVER LABORATORIES 251 BALLARDVALE STREET WILMINGTON MA 01887 1 1 Common Stock 2025-05-15 4 S 0 35 136.32 D 5680 D Common Stock 2025-05-15 4 S 0 81 137.68 D 5599 D Common Stock 2025-05-15 4 S 0 24 139.05 D 5575 D This transaction was executed in multiple trades at prices ranging from $136.07 to $136.97. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024. This transaction was executed in multiple trades at prices ranging from $137.19 to $138.12. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024. This transaction was executed in multiple trades at prices ranging from $139.02 to $139.11. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024. /s/ George E. Massaro 2025-05-16