CWST

SEC source: 0000911177-23-000113 · wk-form4_1691698457.xml · nonDerivative · entry 3

CASELLA DOUGLAS R · CIK 0001055353 · Director · VICE CHAIRMAN, BD OF DIRECTORS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 153,528

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $80.05 to $80.17. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000113 · wk-form4_1691698457.xml · nonDerivative · entry 2

CASELLA DOUGLAS R · CIK 0001055353 · Director · VICE CHAIRMAN, BD OF DIRECTORS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,651

SEC source: 0000911177-23-000113 · wk-form4_1691698457.xml · nonDerivative · entry 1

CASELLA DOUGLAS R · CIK 0001055353 · Director · VICE CHAIRMAN, BD OF DIRECTORS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 157,865

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $80.00 to $80.05. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000105 · wk-form4_1691179574.xml · derivative · entry 9

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 724 shares

Expires 2023-12-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: The option vested in three equal installments on December 13, 2014, 2015, 2016.

SEC source: 0000911177-23-000105 · wk-form4_1691179574.xml · nonDerivative · entry 3

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,299

SEC source: 0000911177-23-000105 · wk-form4_1691179574.xml · nonDerivative · entry 2

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,023

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000911177-23-000105 · wk-form4_1691179574.xml · nonDerivative · entry 1

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,299

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $81.35 to $81.54. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000084 · wk-form4_1685737764.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,487

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000083 · wk-form4_1685737726.xml · nonDerivative · entry 1

Battles Michael Louis · CIK 0001379357 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,830

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000082 · wk-form4_1685737650.xml · nonDerivative · entry 1

DOODY JOSEPH · CIK 0001180658 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,250

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000081 · wk-form4_1685737573.xml · nonDerivative · entry 1

HULLIGAN WILLIAM P · CIK 0001283143 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,702

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000080 · wk-form4_1685737530.xml · nonDerivative · entry 1

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,786

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000078 · wk-form4_1685737426.xml · nonDerivative · entry 1

Kirk Rose M. · CIK 0001820260 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,376

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000077 · wk-form4_1685737353.xml · nonDerivative · entry 1

Sova Gary · CIK 0001863220 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,745

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. 2016 Incentive Plan. Each RSU represents a contingent right to receive one share of Casella's Class A Common Stock. The RSUs will vest in full on June 1, 2024.

SEC source: 0000911177-23-000050 · wf-form4_167899839434229.xml · nonDerivative · entry 1

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,962

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000049 · wf-form4_167899837526129.xml · nonDerivative · entry 1

CASELLA DOUGLAS R · CIK 0001055353 · Director · VICE CHAIRMAN, BD OF DIRECTORS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 160,045

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000047 · wf-form4_167899833253658.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,424

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000048 · wf-form4_167899835749208.xml · nonDerivative · entry 1

Steves Sean · CIK 0001929869 · Sr VP & COO of SW Ops

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,003

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000046 · wf-form4_167899831708281.xml · nonDerivative · entry 1

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,054

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000045 · wf-form4_167899829511553.xml · nonDerivative · entry 1

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,031

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000044 · wf-form4_167899825850646.xml · nonDerivative · entry 1

Sayward Shelley E. · CIK 0001823513 · SENIOR VP & GENERAL COUNSEL

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,146

F1 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on March 12, 2020, March 12, 2021, and March 11, 2022. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $82.10 to $82.48. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000036 · wf-form4_167883067062913.xml · nonDerivative · entry 1

CASELLA DOUGLAS R · CIK 0001055353 · Director · VICE CHAIRMAN, BD OF DIRECTORS

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 160,961

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000035 · wf-form4_167883065466276.xml · nonDerivative · entry 1

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,018

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000034 · wf-form4_167883061208050.xml · nonDerivative · entry 1

Steves Sean · CIK 0001929869 · Sr VP & COO of SW Ops

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,183

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000033 · wf-form4_167883058956149.xml · nonDerivative · entry 1

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,478

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000031 · wf-form4_167883055155869.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 168,034

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000032 · wf-form4_167883057262847.xml · nonDerivative · entry 1

Sayward Shelley E. · CIK 0001823513 · SENIOR VP & GENERAL COUNSEL

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,389

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000030 · wf-form4_167883053552865.xml · nonDerivative · entry 1

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,247

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. 2016 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 March 10, 2024.

SEC source: 0000911177-23-000022 · wf-form4_167727307213922.xml · nonDerivative · entry 3

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,949

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F4 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $75.89 to $76.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000022 · wf-form4_167727307213922.xml · nonDerivative · entry 2

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,477

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $74.89 to $75.88. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000021 · wf-form4_167727303194867.xml · nonDerivative · entry 3

Coletta Edmond · CIK 0001564279 · PRESIDENT & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 165,382

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F4 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $75.89 to $76.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000021 · wf-form4_167727303194867.xml · nonDerivative · entry 2

Coletta Edmond · CIK 0001564279 · PRESIDENT & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 170,383

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $74.89 to $75.88. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000020 · wf-form4_167727298125787.xml · nonDerivative · entry 3

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,981

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F4 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $75.89 to $76.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000020 · wf-form4_167727298125787.xml · nonDerivative · entry 2

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,250

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $74.89 to $75.88. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000018 · wf-form4_167727291476022.xml · nonDerivative · entry 3

Steves Sean · CIK 0001929869 · Sr VP & COO of SW Ops

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,255

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F4 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $75.89 to $76.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000018 · wf-form4_167727291476022.xml · nonDerivative · entry 2

Steves Sean · CIK 0001929869 · Sr VP & COO of SW Ops

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,408

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $74.89 to $75.88. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000019 · wf-form4_167727293516861.xml · nonDerivative · entry 3

Sayward Shelley E. · CIK 0001823513 · SENIOR VP & GENERAL COUNSEL

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,146

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F4 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $75.89 to $76.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000019 · wf-form4_167727293516861.xml · nonDerivative · entry 2

Sayward Shelley E. · CIK 0001823513 · SENIOR VP & GENERAL COUNSEL

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,299

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of PSUs granted to the reporting person on March 12, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a performance-based stock unit agreement constituting a "sell-to-cover transaction" intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Securities Exchange Act of 1934 and the sale does not represent a discretionary trade by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $74.89 to $75.88. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000022 · wf-form4_167727307213922.xml · nonDerivative · entry 1

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,915

F1 · shares: Represents shares of Class A Common Stock acquired by the reporting person upon the vesting of performance-based stock units (PSUs) granted to the reporting person on March 12, 2020, as a result of the level of achievement by Casella Waste Systems, Inc. of certain performance objectives during the period running from January 1, 2022 through December 31, 2022, and a multiplier based on relative total shareholder return for the period running from January 1, 2020 to December 31, 2022.

SEC source: 0000911177-23-000021 · wf-form4_167727303194867.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 181,517

F1 · shares: Represents shares of Class A Common Stock acquired by the reporting person upon the vesting of performance-based stock units (PSUs) granted to the reporting person on March 12, 2020, as a result of the level of achievement by Casella Waste Systems, Inc. of certain performance objectives during the period running from January 1, 2022 through December 31, 2022, and a multiplier based on relative total shareholder return for the period running from January 1, 2020 to December 31, 2022.

SEC source: 0000911177-23-000020 · wf-form4_167727298125787.xml · nonDerivative · entry 1

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,850

F1 · shares: Represents shares of Class A Common Stock acquired by the reporting person upon the vesting of performance-based stock units (PSUs) granted to the reporting person on March 12, 2020, as a result of the level of achievement by Casella Waste Systems, Inc. of certain performance objectives during the period running from January 1, 2022 through December 31, 2022, and a multiplier based on relative total shareholder return for the period running from January 1, 2020 to December 31, 2022.

SEC source: 0000911177-23-000018 · wf-form4_167727291476022.xml · nonDerivative · entry 1

Steves Sean · CIK 0001929869 · Sr VP & COO of SW Ops

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,749

F1 · shares: Represents shares of Class A Common Stock acquired by the reporting person upon the vesting of performance-based stock units (PSUs) granted to the reporting person on March 12, 2020, as a result of the level of achievement by Casella Waste Systems, Inc. of certain performance objectives during the period running from January 1, 2022 through December 31, 2022, and a multiplier based on relative total shareholder return for the period running from January 1, 2020 to December 31, 2022.

SEC source: 0000911177-23-000019 · wf-form4_167727293516861.xml · nonDerivative · entry 1

Sayward Shelley E. · CIK 0001823513 · SENIOR VP & GENERAL COUNSEL

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,640

F1 · shares: Represents shares of Class A Common Stock acquired by the reporting person upon the vesting of performance-based stock units (PSUs) granted to the reporting person on March 12, 2020, as a result of the level of achievement by Casella Waste Systems, Inc. of certain performance objectives during the period running from January 1, 2022 through December 31, 2022, and a multiplier based on relative total shareholder return for the period running from January 1, 2020 to December 31, 2022.

SEC source: 0000911177-23-000002 · wf-form4_167407859401857.xml · nonDerivative · entry 2

Ligon Paul · CIK 0001926747 · SR VP & CHIEF REVENUE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,088

F2 · kind: Represents shares of Class A Common Stock automatically sold by the reporting person to satisfy tax withholding obligations in connection with the vesting of RSUs granted to the reporting person on July 28, 2020. The automatic sale of the reporting person's shares of Class A Common Stock is provided for in a Restricted Stock Unit agreement constituting a "binding contract" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $78.58 to $78.78. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-23-000004 · wf-form5_167450862778501.xml · nonDerivative · entry 5

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Indirect · by SLAT 2

Disclosed balance after: 137,000

F2 · shares: Represents a gift of shares by Mr. Casella's spouse to a Spousal Lifetime Access Trust for the benefit of Mr. Casella ("SLAT 2"). Mr. Casella is the trustee of the SLAT 2.

F4 · ownership.nature: Held by the SLAT 2 for the benefit of Mr. Casella. Mr. Casella is the trustee of the SLAT 2.

SEC source: 0000911177-23-000004 · wf-form5_167450862778501.xml · nonDerivative · entry 4

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 57,100

F2 · shares: Represents a gift of shares by Mr. Casella's spouse to a Spousal Lifetime Access Trust for the benefit of Mr. Casella ("SLAT 2"). Mr. Casella is the trustee of the SLAT 2.

F3 · balance_after: Amount shown reflects an adjustment to correct an inadvertent administrative error that omitted 100 shares of the issuer's Class B Common Stock from columns 4 and 5 of Table I in the Form 4 filed by Mr. Casella on November 15, 2022 ("Previous Form 4"). Table I, column 4 of the Previous Form 4 correctly reported Mr. Casella's disposition of 194,100 shares of Class B Common Stock to his spouse as a gift, but the corresponding acquisition of such shares by Mr. Casella's spouse was inadvertently reported as 194,000 shares of Class B Common Stock in Table I, column 4 as well as in Table I, column 5 reporting indirect beneficial ownership. In both cases, the amount should have been reported as 194,100 shares of Class B Common Stock.

F1 · ownership.nature: 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.

SEC source: 0000911177-23-000002 · wf-form4_167407859401857.xml · nonDerivative · entry 1

Ligon Paul · CIK 0001926747 · SR VP & CHIEF REVENUE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,440

F1 · shares: Represents a gift of shares to Goodwill Industries of Northern New England.

SEC source: 0000911177-22-000073 · wf-form4_166845981334567.xml · nonDerivative · entry 2

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,177

SEC source: 0000911177-22-000073 · wf-form4_166845981334567.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,277

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $81.85 to $82.80. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0000911177-22-000075 · wf-form4_166854761749128.xml · nonDerivative · entry 2

CASELLA JOHN W · CIK 0001055352 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,601

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $81.92 to $82.86. Upon request of the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.