Jana Partners SC 13D/A CHARLES RIVER LABORATORIES INTERNATIONAL / JANA PARTNERS ownership change

EXHIBIT A

TRANSACTIONS IN THE ISSUER IN THE LAST 60 DAYS

Date of Transaction	Shares Purchased (Sold)	Price Per Share ($)
6/8/2011	11,389	38.94
6/8/2011	(3,141)	38.95
6/15/2011	5,300	39.26
6/28/2011	(47,700)	40.05
6/28/2011	(50,000)	40.24
6/28/2011	(52,300)	40.29
6/30/2011	4,859	40.68
7/5/2011	(7,006)	41.11
7/13/2011	(1,732)	40.97
7/14/2011	(100,000)	41.81
7/29/2011	(2,901)	39.51
8/2/2011	(50,500)	37.65
8/2/2011	(30,300)	38.19
8/2/2011	(57,800)	38.28
8/2/2011	(35,200)	38.46
8/3/2011	(50,100)	35.80
8/3/2011	(106,500)	35.99
8/3/2011	(725,000)	36.00
8/3/2011	(125,000)	36.75
8/3/2011	(1,680)	38.22
8/3/2011	(400)	38.31
8/3/2011	(100)	38.40
8/3/2011	(4,500)	38.54

8/4/2011	(32)	34.55
8/4/2011	(12,800)	35.42
8/4/2011	(100,161)	34.81

8/4/2011     (228,800) 34.64