X0306 4 2012-07-17 0 0000911177 CASELLA WASTE SYSTEMS INC CWST 0001055352 CASELLA JOHN W C/O CASELLA WASTE SYSTEMS 25 GREENS HILL LANE RUTLAND VT 05701 1 1 0 0 Chief Executive Officer Class A Common Stock 2012-07-17 4 S 0 3800 5.3637 D 281889 D Class A Common Stock 2012-07-18 4 S 0 9140 5.2967 D 272749 D Class A Common Stock 694 I See Footnote Class B Common Stock 494100 D Class A Common Stock 91246 I See Footnote Represents shares of stock sold for tax purposes in relation to the vesting of RSU's on June 11, June 14, and June 16, 2012, respectively. Held by Mr. Casella's spouse. Mr. Casella disclaims beneficial ownership of the securities to the extent to which he does not have an actual pecuniary interest in such securities. Held in trust for the benefit of Mr. Casella's children. Mr. Casella disclaims beneficial ownership of these securities to the extent to which he does not have an actual pecuniary interest in such securities. /s/ Shelley S. Field, Attorney in Fact for John W. Casella 2012-07-19