X0306 4 2017-03-01 0001100682 CHARLES RIVER LABORATORIES INTERNATIONAL INC CRL 0001270263 BERTOLINI ROBERT J CHARLES RIVER LABORATORIES 251 BALLARDVALE STREET WILMINGTON MA 01887 1 Common Stock 2017-03-01 4 S 0 100 87.78 D 26785 D Common Stock 2017-03-01 4 S 0 200 87.91 D 26585 D Common Stock 2017-03-01 4 S 0 400 87.92 D 26185 D Common Stock 2017-03-01 4 S 0 200 87.93 D 25985 D Common Stock 2017-03-01 4 S 0 500 87.94 D 25485 D Common Stock 2017-03-01 4 S 0 100 87.945 D 25385 D Common Stock 2017-03-01 4 S 0 100 87.95 D 25285 D Common Stock 2017-03-01 4 S 0 200 87.96 D 25085 D Common Stock 2017-03-01 4 S 0 743 87.98 D 24342 D Common Stock 2017-03-01 4 S 0 100 87.99 D 24242 D Common Stock 2017-03-01 4 S 0 2726 88.00 D 21516 D Common Stock 2017-03-01 4 S 0 100 88.02 D 21416 D Common Stock 2017-03-01 4 S 0 300 88.03 D 21116 D Common Stock 2017-03-01 4 S 0 165 88.06 D 20951 D Common Stock 2017-03-01 4 S 0 100 88.08 D 20851 D Common Stock 2017-03-01 4 S 0 100 88.12 D 20751 D Common Stock 2017-03-01 4 S 0 200 88.13 D 20551 D Common Stock 2017-03-01 4 S 0 1 88.17 D 20550 D Common Stock 2017-03-01 4 S 0 100 88.21 D 20450 D Common Stock 2017-03-01 4 S 0 100 88.23 D 20350 D Common Stock 2017-03-01 4 S 0 100 88.27 D 20250 D Common Stock 2017-03-01 4 S 0 100 88.34 D 20150 D /s/ Robert J. Bertolini 2017-03-02