X0306 4 2019-02-26 0001100682 CHARLES RIVER LABORATORIES INTERNATIONAL INC CRL 0001141722 FOSTER JAMES C 251 BALLARDVALE STREET WILMINGTON MA 01887 1 1 Chairman, President and CEO Common Stock 2019-02-26 4 S 0 100 140.36 D 290015 D Common Stock 2019-02-26 4 S 0 85 140.37 D 289930 D Common Stock 2019-02-26 4 S 0 100 140.38 D 289830 D Common Stock 2019-02-26 4 S 0 300 140.40 D 289530 D Common Stock 2019-02-26 4 S 0 7 140.405 D 289523 D Common Stock 2019-02-26 4 S 0 100 140.43 D 289423 D Common Stock 2019-02-26 4 S 0 200 140.44 D 289223 D Common Stock 2019-02-26 4 S 0 200 140.465 D 289023 D Common Stock 2019-02-26 4 S 0 100 140.49 D 288923 D Common Stock 2019-02-26 4 S 0 300 140.50 D 288623 D Common Stock 2019-02-26 4 S 0 4 140.505 D 288619 D Common Stock 2019-02-26 4 S 0 100 140.51 D 288519 D Common Stock 2019-02-26 4 S 0 100 140.525 D 288419 D Common Stock 2019-02-26 4 S 0 400 140.53 D 288019 D Common Stock 2019-02-26 4 S 0 94 140.56 D 287925 D Common Stock 2019-02-26 4 S 0 200 140.57 D 287725 D Common Stock 2019-02-26 4 S 0 97 140.59 D 287628 D Common Stock 2019-02-26 4 S 0 171 140.60 D 287457 D Common Stock 2019-02-26 4 S 0 100 140.63 D 287357 D Common Stock 2019-02-26 4 S 0 100 140.65 D 287257 D Common Stock 2019-02-26 4 S 0 100 140.68 D 287157 D Common Stock 2019-02-26 4 S 0 300 140.69 D 286857 D Common Stock 2019-02-26 4 S 0 100 140.71 D 286757 D This sale occurred pursuant to a 10b5-1 Trading Plan. /s/ James C. Foster 2019-02-26