X0306 4 2017-02-22 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 2017-02-22 4 S 0 300 87.75 D 378277 D Common Stock 2017-02-22 4 S 0 200 87.755 D 378077 D Common Stock 2017-02-22 4 S 0 500 87.76 D 377577 D Common Stock 2017-02-22 4 S 0 720 87.77 D 376857 D Common Stock 2017-02-22 4 S 0 906 87.78 D 375951 D Common Stock 2017-02-22 4 S 0 200 87.795 D 375751 D Common Stock 2017-02-22 4 S 0 200 87.80 D 375551 D Common Stock 2017-02-22 4 S 0 100 87.805 D 375451 D Common Stock 2017-02-22 4 S 0 452 87.81 D 374999 D Common Stock 2017-02-22 4 S 0 200 87.82 D 374799 D Common Stock 2017-02-22 4 S 0 100 87.83 D 374699 D Common Stock 2017-02-22 4 S 0 148 87.84 D 374551 D Common Stock 2017-02-22 4 S 0 100 87.85 D 374451 D Common Stock 2017-02-22 4 S 0 734 87.86 D 373717 D Common Stock 2017-02-22 4 S 0 100 87.865 D 373617 D Common Stock 2017-02-22 4 S 0 1000 87.87 D 372617 D Common Stock 2017-02-22 4 S 0 600 87.88 D 372017 D Common Stock 2017-02-22 4 S 0 100 87.895 D 371917 D Common Stock 2017-02-22 4 S 0 200 87.90 D 371717 D Common Stock 2017-02-22 4 S 0 200 87.91 D 371517 D Common Stock 2017-02-22 4 S 0 200 87.92 D 371317 D Common Stock 2017-02-22 4 S 0 200 87.93 D 371117 D Common Stock 2017-02-22 4 S 0 300 87.94 D 370817 D Common Stock 2017-02-22 4 S 0 598 87.95 D 370219 D Common Stock 2017-02-22 4 S 0 100 87.96 D 370119 D Common Stock 2017-02-22 4 S 0 200 87.97 D 369919 D This sale occurred pursuant to a 10b5-1 Trading Plan. /s/ James C. Foster 2017-02-23