144 0001055352 XXXXXXXX LIVE 0000911177 Casella Waste Systems, Inc. 000-23211 25 Greens Hill Lane Rutland VT 05701 8027720325 John W. Casella Chairman and Chief Executive Officer Common Raymond James & Associates, Inc.

880 Carillon Parkway St. Petersburg FL 33716

724 58419.56 57962000 08/03/2023 NASDAQ Common 08/03/2023 Stock Option Exercise Casella Waste Systems, Inc. N 724 08/03/2023 Cash N John W. Casella

67 Ives Avenue Rutland VT 05701

Common 08/02/2023 35732 2908767.03 08/03/2023 /s/ John W. Casella