X0305 4 2012-05-30 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 2012-05-30 4 A 0 26951 0 A 246738 D Class B Common Stock 494100 D Class A Common Stock 91246 I See Footnote Class A Common Stock 694 I See Footnote Held by Mr. Casella's spouse. Mr. Casella disclaims beneficial ownership of the securities indicated 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 the securities indicated to the extent to which he does not have an actual pecuniary interest in such securities. Represents the award of Restricted Stock Units (RSU's) under the Casella Waste Systems, Inc. (Casella) 2006 Stock Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. RSUs vest in three equal annual installments beginning on May 30, 2013. /s/ Shelley S. Field, Attorney in Fact for John W. Casella 2012-06-04