X0305 4 2012-06-14 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 2012-06-14 4 M 0 7664 0 A 272265 D Class A Common Stock 2012-06-16 4 M 0 13424 0 A 285689 D Class A Common Stock 694 I See Footnote Class B Common Stock 494100 D Class A Common Stock 91246 I See Footnote Restricted Stock Unit 2012-06-14 4 M 0 7664 0 A Class A Common Stock 7664 15328 D Restricted Stock Unit 2012-06-16 4 M 0 13424 0 A Class A Common Stock 13424 13424 D Represents the award of Restricted Stock Units ("RSUs") 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. These RSUs vest in three equal installments beginning on June 14, 2012, and are being reported upon the vesting pursuant to Section 16(a) of the Securities Exchange Act of 1934 and applicable regulations thereunder. 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. Reflects the settlement of vested RSUs for shares of Class A Common Stock. These RSUs vest in three equal installments beginning on June 16, 2011, and are being reported upon the vesting pursuant to Section 16(a) of the Securities Exchange Act of 1934 and applicable regulations thereunder. /s/ Shelley S. Field, Attorney in Fact for John W. Casella 2012-06-18