CWST

SEC source: 0000911177-25-000064 · wk-form4_1741983141.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,571

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on August 2, 2023 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000064 · wk-form4_1741983141.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,786

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 12, 2026.

SEC source: 0000911177-25-000060 · wk-form4_1741983041.xml · nonDerivative · entry 1

Helgeson Bradford John · CIK 0001593745 · Executive VP and CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,450

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 12, 2026.

SEC source: 0000911177-25-000062 · wk-form4_1741983091.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,543

F3 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 16, 2022 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000062 · wk-form4_1741983091.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,614

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on August 2, 2023 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000062 · wk-form4_1741983091.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,714

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 12, 2026.

SEC source: 0000911177-25-000058 · wk-form4_1741982984.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 108,948

F3 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 25, 2022 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000058 · wk-form4_1741982984.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 109,172

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on August 30, 2023 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000058 · wk-form4_1741982984.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 109,444

F1 · kind: Represents the award of Restricted Stock Units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 12, 2026.

SEC source: 0000911177-25-000052 · wk-form4_1741812056.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: 107,875

F2 · balance_after: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $112.19 to $112.64. 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: 0000911177-25-000052 · wk-form4_1741812056.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: 111,033

F1 · balance_after: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $111.00 to $111.81. 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: 0000911177-25-000038 · wk-form4_1741037206.xml · nonDerivative · entry 2

Coletta Edmond · CIK 0001564279 · PRESIDENT

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 158,381

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 11, 2022. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 12, 2022 and does not represent a discretionary sale by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $113.70 to $113.90. 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: 0000911177-25-000037 · wk-form4_1741037154.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,716

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 11, 2022. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 12, 2022 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000039 · wk-form4_1741037274.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,258

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 11, 2022. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 12, 2022 and does not represent a discretionary sale by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $113.38 to $114.27. 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: 0000911177-25-000035 · wk-form4_1741037049.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,763

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 11, 2022. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 16, 2022 and does not represent a discretionary sale by the reporting person.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $113.46 to $113.50. 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: 0000911177-25-000034 · wk-form4_1741036998.xml · nonDerivative · entry 2

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,054

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 11, 2022. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 18, 2022 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000033 · wk-form4_1741036953.xml · nonDerivative · entry 2

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,398

F2 · kind: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of PSUs previously granted to the reporting person on March 11, 2022. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on May 19, 2022 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-25-000038 · wk-form4_1741037206.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,587

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 11, 2022, as a result of the level of achievement by the issuer of certain performance objectives during the period running from January 1, 2024 through December 31, 2024, and a multiplier based on relative total shareholder return for the period running from January 1, 2022 to December 31, 2024, as certified by the issuer's compensation and human capital committee on February 27, 2025.

SEC source: 0000911177-25-000037 · wk-form4_1741037154.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,654

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 11, 2022, as a result of the level of achievement by the issuer of certain performance objectives during the period running from January 1, 2024 through December 31, 2024, and a multiplier based on relative total shareholder return for the period running from January 1, 2022 to December 31, 2024, as certified by the issuer's compensation and human capital committee on February 27, 2025.

SEC source: 0000911177-25-000039 · wk-form4_1741037274.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,835

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 11, 2022, as a result of the level of achievement by the issuer of certain performance objectives during the period running from January 1, 2024 through December 31, 2024, and a multiplier based on relative total shareholder return for the period running from January 1, 2022 to December 31, 2024, as certified by the issuer's compensation and human capital committee on February 27, 2025.

SEC source: 0000911177-25-000035 · wk-form4_1741037049.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,258

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 11, 2022, as a result of the level of achievement by the issuer of certain performance objectives during the period running from January 1, 2024 through December 31, 2024, and a multiplier based on relative total shareholder return for the period running from January 1, 2022 to December 31, 2024, as certified by the issuer's compensation and human capital committee on February 27, 2025.

SEC source: 0000911177-25-000034 · wk-form4_1741036998.xml · nonDerivative · entry 1

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,541

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 11, 2022, as a result of the level of achievement by the issuer of certain performance objectives during the period running from January 1, 2024 through December 31, 2024, and a multiplier based on relative total shareholder return for the period running from January 1, 2022 to December 31, 2024, as certified by the issuer's compensation and human capital committee on February 27, 2025.

SEC source: 0000911177-25-000033 · wk-form4_1741036953.xml · nonDerivative · entry 1

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,534

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 11, 2022, as a result of the level of achievement by the issuer of certain performance objectives during the period running from January 1, 2024 through December 31, 2024, and a multiplier based on relative total shareholder return for the period running from January 1, 2022 to December 31, 2024, as certified by the issuer's compensation and human capital committee on February 27, 2025.

SEC source: 0000911177-24-000122 · wk-form4_1734383377.xml · nonDerivative · entry 2

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,624

SEC source: 0000911177-24-000122 · wk-form4_1734383377.xml · nonDerivative · entry 1

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,649

F1 · shares: Represents a gift of shares to Lydia Green.

SEC source: 0000911177-24-000118 · wk-form4_1733346206.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: 113,262

F1 · shares: Represents a gift of shares to the Goldman Sachs Philanthropy Fund.

SEC source: 0000911177-24-000115 · wk-form4_1732570552.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,138

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $112.70 to $112.92. 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: 0000911177-24-000116 · wk-form4_1732570623.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: 115,435

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $112.16 to $112.47. 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: 0000911177-24-000108 · wk-form4_1731965966.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,729

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $107.00 to $107.25. 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: 0000911177-24-000108 · wk-form4_1731965966.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,526

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $106.00 to $106.85. 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: 0000911177-24-000108 · wk-form4_1731965966.xml · derivative · entry 10

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 · 27,940 shares

Expires 2026-11-17

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.

F7 · derivative.exercise_date: The option vested on February 20, 2019.

SEC source: 0000911177-24-000108 · wk-form4_1731965966.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,418

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $108.50 to $108.837. 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: 0000911177-24-000108 · wk-form4_1731965966.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,669

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: 0000911177-24-000104 · wk-form4_1731446235.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,802

SEC source: 0000911177-24-000106 · wk-form4_1731446368.xml · nonDerivative · entry 1

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,224

F1 · shares: Represents a gift of shares to the Nagle-Green Charitable Fund at Fidelity.

SEC source: 0000911177-24-000100 · wk-form4_1731100859.xml · nonDerivative · entry 1

Helgeson Bradford John · CIK 0001593745 · Executive VP and CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,548

F1 · shares: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on November 16, 2023 and does not represent a discretionary sale by the reporting person.

SEC source: 0000911177-24-000098 · wk-form4_1731013814.xml · nonDerivative · entry 1

Ligon Paul · CIK 0001926747 · SR VP of Sustainable Growth

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,085

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $106.80 to $106.93. 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: 0000911177-24-000102 · wk-form4_1731100980.xml · nonDerivative · entry 2

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 6,763

F3 · balance_after: Reflects shares previously reported as directly owned by the reporting person but are now being reported as indirectly owned through the Jack Calvin Green Unelected Trust, of which the reporting person is a trustee and beneficiary.

F4 · ownership.nature: Shares held by the Jack Calvin Green Unelected Trust, of which the reporting person is a trustee and beneficiary.

SEC source: 0000911177-24-000102 · wk-form4_1731100980.xml · nonDerivative · entry 1

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,729

F1 · shares: Represents a gift of shares to Lydia Green.

F2 · balance_after: Excludes 7,508 shares previously reported as directly owned by the reporting person but are now being reported as indirectly owned through the Jack Calvin Green Unelected Trust, of which the reporting person is a trustee and beneficiary.

SEC source: 0000911177-24-000096 · wk-form4_1730927593.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,729

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $100.44 to $101.37. 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: 0000911177-24-000096 · wk-form4_1730927593.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,539

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $99.44 to $100.40. 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: 0000911177-24-000094 · wk-form4_1730840895.xml · nonDerivative · entry 3

Coletta Edmond · CIK 0001564279 · PRESIDENT

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,034

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $100.52 to $100.68. 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: 0000911177-24-000094 · wk-form4_1730840895.xml · nonDerivative · entry 2

Coletta Edmond · CIK 0001564279 · PRESIDENT

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,726

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $99.50 to $100.50. 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: 0000911177-24-000094 · wk-form4_1730840895.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,034

F1 · kind: Represents a gift of shares to the Ned and Elizabeth Coletta Fund, a Goldman Sachs Philanthropy Fund.

SEC source: 0000911177-24-000093 · wk-form4_1730840833.xml · nonDerivative · entry 2

HULLIGAN WILLIAM P · CIK 0001283143 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,153

SEC source: 0000911177-24-000093 · wk-form4_1730840833.xml · nonDerivative · entry 1

HULLIGAN WILLIAM P · CIK 0001283143 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,651

SEC source: 0000911177-24-000082 · wk-form4_1725394468.xml · nonDerivative · entry 1

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,895

F1 · shares: Represents the sale of shares of Class A Common Stock pursuant to a "sell-to-cover" transaction in order to satisfy tax withholding obligations in connection with the vesting of RSUs previously granted to the reporting person. This sale was effected pursuant to an automatic sell-to-cover instruction adopted by the reporting person on August 31, 2021 and does not represent a discretionary sale by the reporting person.

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $105.41 to $105.43. 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: 0000911177-24-000067 · wk-form4_1717792023.xml · nonDerivative · entry 1

Battles Michael Louis · CIK 0001379357 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,281

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 6, 2025.

SEC source: 0000911177-24-000066 · wk-form4_1717791968.xml · nonDerivative · entry 1

DOODY JOSEPH · CIK 0001180658 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,701

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 6, 2025.

SEC source: 0000911177-24-000065 · wk-form4_1717791931.xml · nonDerivative · entry 1

Kirk Rose M. · CIK 0001820260 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,827

F1 · shares: Represents the award of restricted stock units (RSUs) under the Casella Waste Systems, Inc. Amended and Restated 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 6, 2025.