X0306 4 2016-03-01 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 2016-03-01 4 A 0 47468 0 A 533994 D Class B Common Stock 494100 D 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. In addition, previously reported indirect ownership of 91,246 shares of Class A Common Stock held in trust for the benefit of Mr. Casella's children are no longer being reported as it has been determined that Mr. Casella did not beneficially own such shares after such shares were gifted by Mr. Casella to his children's trusts. Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 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 installments beginning on March 1, 2017. /s/ John W. Casella 2016-03-03