X0407 4 2023-07-03 0001100682 CHARLES RIVER LABORATORIES INTERNATIONAL, INC. CRL 0001414815 MACKAY MARTIN 251 BALLARDVALE STREET WILMINGTON MA 01887 1 0 Common Stock 2023-07-03 4 A 0 95 0 A 11600 D The grant was made in lieu of director service fees for the term commencing May 9, 2023. The restricted stock units vest the earlier of July 3, 2024 and the business day prior to the Company's next annual meeting of shareholders. /s/ Martin Mackay 2023-07-05