X0306 4 2017-02-28 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 2017-02-28 4 S 0 100 87.435 D 391753 D Common Stock 2017-02-28 4 S 0 500 87.44 D 391253 D Common Stock 2017-02-28 4 S 0 100 87.45 D 391153 D Common Stock 2017-02-28 4 S 0 200 87.48 D 390953 D Common Stock 2017-02-28 4 S 0 300 87.49 D 390653 D Common Stock 2017-02-28 4 S 0 200 87.50 D 390453 D Common Stock 2017-02-28 4 S 0 200 87.51 D 390253 D Common Stock 2017-02-28 4 S 0 300 87.53 D 389953 D Common Stock 2017-02-28 4 S 0 100 87.55 D 389853 D Common Stock 2017-02-28 4 S 0 302 87.56 D 389551 D Common Stock 2017-02-28 4 S 0 200 87.59 D 389351 D Common Stock 2017-02-28 4 S 0 90 87.605 D 389261 D Common Stock 2017-02-28 4 S 0 100 87.615 D 389161 D Common Stock 2017-02-28 4 S 0 200 87.63 D 388961 D Common Stock 2017-02-28 4 S 0 10 87.67 D 388951 D Common Stock 2017-02-28 4 S 0 140 87.675 D 388811 D Common Stock 2017-02-28 4 S 0 80 87.69 D 388731 D Common Stock 2017-02-28 4 S 0 200 87.695 D 388531 D Common Stock 2017-02-28 4 S 0 300 87.70 D 388231 D Common Stock 2017-02-28 4 S 0 516 87.71 D 387715 D Common Stock 2017-02-28 4 S 0 43 87.75 D 387672 D Common Stock 2017-02-28 4 S 0 200 87.77 D 387472 D Common Stock 2017-02-28 4 S 0 200 87.79 D 387272 D Common Stock 2017-02-28 4 S 0 100 87.80 D 387172 D Common Stock 2017-02-28 4 S 0 100 87.81 D 387072 D Common Stock 2017-02-28 4 S 0 300 87.82 D 386772 D This sale occurred pursuant to a 10b5-1 Trading Plan. /s/ James C. Foster 2017-02-28