CWST

SEC source: 0001224062-26-000008 · wk-form4_1788467361.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,641

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $95.13 to $95.41. 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: 0001224062-26-000006 · wk-form4_1787777116.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,741

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $92.85 to $93.06. 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: 0001055353-26-000008 · wk-form4_1786742163.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: 90,141

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $91.04 to $91.26. 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: 0001055353-26-000008 · wk-form4_1786742163.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: 91,484

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $91.00 to $91.23. 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: 0001055353-26-000008 · wk-form4_1786742163.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: 104,803

SEC source: 0002142092-26-000004 · wk-form4_1786565653.xml · derivative · entry 1

Ribar Damian Andrew · CIK 0002142092 · Executive VP and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2036-08-10

F1 · derivative.exercise_date: This option shall become exercisable with respect to one-third of the shares on August 11, 2027, and shall become exercisable as to an additional one-third of the shares on each of the second and third anniversaries of the grant date.

SEC source: 0001553453-26-000004 · wk-form4_1781121798.xml · nonDerivative · entry 1

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,902

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

SEC source: 0001055353-26-000006 · wk-form4_1780689834.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: 106,641

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 4, 2027.

SEC source: 0001224062-26-000004 · wk-form4_1780689816.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,841

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 4, 2027.

SEC source: 0001379357-26-000006 · wk-form4_1780689802.xml · nonDerivative · entry 1

Battles Michael Louis · CIK 0001379357 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,289

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 4, 2027.

SEC source: 0001553453-26-000002 · wk-form4_1780689785.xml · nonDerivative · entry 1

Green Emily Nagle · CIK 0001553453 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,502

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 4, 2027.

SEC source: 0001863220-26-000002 · wk-form4_1780689769.xml · nonDerivative · entry 1

Sova Gary · CIK 0001863220 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,204

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 4, 2027.

SEC source: 0001283143-26-000002 · wk-form4_1780689755.xml · nonDerivative · entry 1

HULLIGAN WILLIAM P · CIK 0001283143 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,161

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 4, 2027.

SEC source: 0001180658-26-000002 · wk-form4_1780689741.xml · nonDerivative · entry 1

DOODY JOSEPH · CIK 0001180658 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,143

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 4, 2027.

SEC source: 0001820260-26-000002 · wk-form4_1780689727.xml · nonDerivative · entry 1

Kirk Rose M. · CIK 0001820260 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,835

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 4, 2027.

SEC source: 0001055352-26-000008 · wk-form4_1780436527.xml · nonDerivative · entry 5

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by SLAT 2

Disclosed balance after: 167,800

F3 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT 2") for the benefit of Mr. Casella. Mr. Casella is the trustee of the SLAT 2.

F5 · ownership.nature: Held by the SLAT 2 for the benefit of Mr. Casella. Mr. Casella is the trustee of the SLAT 2.

SEC source: 0001055352-26-000008 · wk-form4_1780436527.xml · nonDerivative · entry 4

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 26,300

F3 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT 2") for the benefit of Mr. Casella. Mr. Casella is the trustee of the SLAT 2.

F4 · 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: 0001055352-26-000008 · wk-form4_1780436527.xml · nonDerivative · entry 3

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By SLAT

Disclosed balance after: 170,200

F1 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT") for the benefit of Mr. Casella's spouse. Mr. Casella's spouse is the trustee of the SLAT.

F2 · ownership.nature: Held by the SLAT for the benefit of Mr. Casella's spouse. Mr. Casella's spouse is the trustee of the SLAT. 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: 0001055352-26-000008 · wk-form4_1780436527.xml · nonDerivative · entry 2

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 129,800

F1 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT") for the benefit of Mr. Casella's spouse. Mr. Casella's spouse is the trustee of the SLAT.

SEC source: 0001224062-26-000002 · wk-form4_1779912443.xml · nonDerivative · entry 1

BURKE MICHAEL K · CIK 0001224062 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,048

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $87.45 to $87.69. 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: 0001564279-26-000007 · wk-form4_1779459736.xml · nonDerivative · entry 3

Coletta Edmond · CIK 0001564279 · PRESIDENT & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,118

F2 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $90.07 to $90.09. 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: 0001564279-26-000007 · wk-form4_1779459736.xml · nonDerivative · entry 2

Coletta Edmond · CIK 0001564279 · PRESIDENT & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,025

SEC source: 0001564279-26-000007 · wk-form4_1779459736.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,618

F1 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $89.00 to $89.27. 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: 0001055353-26-000002 · wk-form4_1774384147.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By SLAT 2

Disclosed balance after: 177,000

F1 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT 2") for the benefit of Mr. Casella. Mr. Casella's spouse is the trustee of the SLAT 2.

F2 · ownership.nature: Held by the SLAT 2 for the benefit of Mr. Casella. Mr. Casella's spouse is the trustee of the SLAT 2. The trustee of SLAT 2 was incorrectly identified in prior filings as Mr. Casella.

SEC source: 0001055353-26-000002 · wk-form4_1774384147.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: 129,000

F1 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT 2") for the benefit of Mr. Casella. Mr. Casella's spouse is the trustee of the SLAT 2.

SEC source: 0001055353-26-000004 · wk-form4a_1780606161.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By SLAT

Disclosed balance after: 171,000

F1 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust for the benefit of Mr. Casella's spouse ("SLAT"). Mr. Casella's spouse is the trustee of the SLAT. The original Form 4 filed on March 24, 2026 (the "Original Form 4") incorrectly reported the gift as a transfer of the shares to the Spousal Lifetime Access Trust for the benefit of Mr. Casella ("SLAT 2"). This amendment reflects the transfer of the shares to the SLAT and the correct amount of securities beneficially owned by the SLAT following the transaction reported in the Original Form 4.

F2 · ownership.nature: Held by the SLAT. Mr. Casella's spouse is the trustee of the SLAT. 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: 0001055353-26-000002 · wk-form4_1774384147.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By SLAT

Disclosed balance after: 164,000

F3 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT") for the benefit of Mr. Casella's spouse. Mr. Casella is the trustee of the SLAT.

F5 · ownership.nature: Held by the SLAT for the benefit of Mr. Casella's spouse. Mr. Casella is the trustee of the SLAT. The trustee of the SLAT was incorrectly identified in prior filings as 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: 0001055353-26-000002 · wk-form4_1774384147.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 24,100

F3 · kind: Represents a gift of shares to the Spousal Lifetime Access Trust ("SLAT") for the benefit of Mr. Casella's spouse. Mr. Casella is the trustee of the SLAT.

F4 · 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: 0001055353-26-000004 · wk-form4a_1780606161.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By SLAT 2

Disclosed balance after: 170,000

F3 · kind: Represents a gift of shares to the SLAT 2. Mr. Casella is the trustee of the SLAT 2. The Original Form 4 incorrectly reported the gift as a transfer of the shares to the SLAT. This amendment reflects the transfer of the shares to the SLAT 2 and the correct amount of securities beneficially owned by the SLAT 2 following the transaction reported in the Original Form 4.

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

SEC source: 0001055352-26-000006 · wk-form4_1773694490.xml · nonDerivative · entry 3

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,795

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 22, 2023 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 $87.77 to $87.85. 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: 0001564279-26-000004 · wk-form4_1773694461.xml · nonDerivative · entry 3

Coletta Edmond · CIK 0001564279 · PRESIDENT & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 152,618

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: 0001917955-26-000004 · wk-form4_1773694432.xml · nonDerivative · entry 3

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,873

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: 0001929869-26-000004 · wk-form4_1773694409.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,375

F1 · 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: 0001823513-26-000004 · wk-form4_1773694389.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,369

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: 0001593745-26-000002 · wk-form4_1773694366.xml · nonDerivative · entry 2

Helgeson Bradford John · CIK 0001593745 · Executive VP and CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,342

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 November 16, 2023 and does not represent a discretionary sale by the reporting person.

SEC source: 0002114418-26-000005 · wk-form4_1773778811.xml · nonDerivative · entry 1

Rains Christopher Alan · CIK 0002114418 · Sr. VP & Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 989

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, 2027.

SEC source: 0001055352-26-000006 · wk-form4_1773694490.xml · nonDerivative · entry 2

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,539

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 22, 2023 and does not represent a discretionary sale by the reporting person.

SEC source: 0001055352-26-000006 · wk-form4_1773694490.xml · nonDerivative · entry 1

CASELLA JOHN W · CIK 0001055352 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 33,502

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, 2027.

SEC source: 0001564279-26-000004 · wk-form4_1773694461.xml · nonDerivative · entry 2

Coletta Edmond · CIK 0001564279 · PRESIDENT & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 153,606

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: 0001564279-26-000004 · wk-form4_1773694461.xml · nonDerivative · entry 1

Coletta Edmond · CIK 0001564279 · PRESIDENT & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 153,983

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, 2027.

SEC source: 0001917955-26-000004 · wk-form4_1773694432.xml · nonDerivative · entry 2

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,958

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: 0001917955-26-000004 · wk-form4_1773694432.xml · nonDerivative · entry 1

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,013

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, 2027.

SEC source: 0001929869-26-000004 · wk-form4_1773694409.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,572

F1 · 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: 0001823513-26-000004 · wk-form4_1773694389.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,731

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: 0001823513-26-000004 · wk-form4_1773694389.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,860

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, 2027.

SEC source: 0001593745-26-000002 · wk-form4_1773694366.xml · nonDerivative · entry 1

Helgeson Bradford John · CIK 0001593745 · Executive VP and CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,747

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, 2027.

SEC source: 0001929869-26-000002 · wk-form4_1772487796.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: 9,669

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 10, 2023. 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.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $92.88 to $92.93. 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: 0001917955-26-000002 · wk-form4_1772487774.xml · nonDerivative · entry 2

Drohan Kevin · CIK 0001917955 · VP & CHIEF ACCOUNTING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,462

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 10, 2023. 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: 0001564279-26-000002 · wk-form4_1772487753.xml · nonDerivative · entry 2

Coletta Edmond · CIK 0001564279 · PRESIDENT

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,091

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 10, 2023. 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.

F3 · price: Represents the weighted average sales price for shares sold in multiple transactions, ranging from $93.69 to $93.86. 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: 0001823513-26-000002 · wk-form4_1772487695.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,206

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 10, 2023. 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.