AMRC

SEC source: 0001628280-26-010782 · wk-form4_1771888693.xml · derivative · entry 6

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,355

Underlying: Class A Common Stock · 15,700 shares

Expires 2029-04-23

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.

F3 · derivative.exercise_date: Of the shares subject to the option, 20% vested on April 24, 2020, and the remainder vested in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-010782 · wk-form4_1771888693.xml · nonDerivative · entry 4

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,111

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 8, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.00 to $34.53, inclusive. The reporting person undertakes to provide to Ameresco, Inc., any security holder of Ameresco, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote 2 to this Form 4.

SEC source: 0001628280-26-010782 · wk-form4_1771888693.xml · nonDerivative · entry 3

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,811

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: 0001628280-26-010782 · wk-form4_1771888693.xml · derivative · entry 5

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,055

Underlying: Class A Common Stock · 400 shares

Expires 2029-04-23

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.

F3 · derivative.exercise_date: Of the shares subject to the option, 20% vested on April 24, 2020, and the remainder vested in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-010782 · wk-form4_1771888693.xml · nonDerivative · entry 2

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,111

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 8, 2025.

SEC source: 0001628280-26-010782 · wk-form4_1771888693.xml · nonDerivative · entry 1

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,511

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: 0001628280-26-008228 · wk-form4_1771027073.xml · derivative · entry 6

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,455

Underlying: Class A Common Stock · 245 shares

Expires 2029-04-23

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.

F3 · derivative.exercise_date: Of the shares subject to the option, 20% vested on April 24, 2020, and the remainder vested in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-008228 · wk-form4_1771027073.xml · nonDerivative · entry 4

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,111

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 8, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $34.02 to $34.15, inclusive. The reporting person undertakes to provide to Ameresco, Inc., any security holder of Ameresco, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote 2 to this Form 4.

SEC source: 0001628280-26-008228 · wk-form4_1771027073.xml · nonDerivative · entry 3

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,356

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: 0001628280-26-008228 · wk-form4_1771027073.xml · derivative · entry 5

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,700

Underlying: Class A Common Stock · 200 shares

Expires 2029-04-23

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.

F3 · derivative.exercise_date: Of the shares subject to the option, 20% vested on April 24, 2020, and the remainder vested in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-008228 · wk-form4_1771027073.xml · nonDerivative · entry 2

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,111

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 8, 2025.

SEC source: 0001628280-26-008228 · wk-form4_1771027073.xml · nonDerivative · entry 1

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,311

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: 0001628280-26-004421 · wk-form4_1769812075.xml · derivative · entry 3

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,900

Underlying: Class A Common Stock · 100 shares

Expires 2029-04-23

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.

F2 · derivative.exercise_date: Of the shares subject to the option, 20% vested on April 24, 2020, and the remainder vested in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-004421 · wk-form4_1769812075.xml · nonDerivative · entry 2

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,111

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 8, 2025.

SEC source: 0001628280-26-004421 · wk-form4_1769812075.xml · nonDerivative · entry 1

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,211

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: 0001488139-25-000164 · wk-form4_1760473751.xml · derivative · entry 12

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,899

Underlying: Class A Common Stock · 11,799 shares

Expires 2029-08-06

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.

F4 · derivative.exercise_date: On August 6, 2019, the reporting person was granted an option to purchase 40,000 shares of Class A common stock. The option vested based on continued service to Ameresco, Inc. and performance relative to goals established for the three-year performance period from January 1, 2019 to December 31, 2021. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Board of Directors, this option vested as to 36,000 shares.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · derivative · entry 11

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 5,000 shares

Expires 2028-10-23

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: Of the shares subject to the option, 20% vest on October 24, 2019, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 8

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 7

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 6

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,788

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.92 to $41.92, inclusive. The reporting person undertakes to provide to Ameresco, Inc., any security holder of Ameresco, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes 2 and 3 to this Form 4.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 5

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,988

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: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 4

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,189

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: 0001488139-25-000164 · wk-form4_1760473751.xml · derivative · entry 10

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Class A Common Stock · 5,000 shares

Expires 2028-10-23

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: Of the shares subject to the option, 20% vest on October 24, 2019, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · derivative · entry 9

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,698

Underlying: Class A Common Stock · 2,100 shares

Expires 2029-08-06

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.

F4 · derivative.exercise_date: On August 6, 2019, the reporting person was granted an option to purchase 40,000 shares of Class A common stock. The option vested based on continued service to Ameresco, Inc. and performance relative to goals established for the three-year performance period from January 1, 2019 to December 31, 2021. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Board of Directors, this option vested as to 36,000 shares.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 3

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.72 to $40.18, inclusive.

SEC source: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 2

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,289

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: 0001488139-25-000164 · wk-form4_1760473751.xml · nonDerivative · entry 1

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,289

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: 0001488139-25-000162 · wk-form4_1759972613.xml · derivative · entry 9

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,798

Underlying: Class A Common Stock · 3,800 shares

Expires 2029-08-06

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.

F4 · derivative.exercise_date: On August 6, 2019, the reporting person was granted an option to purchase 40,000 shares of Class A common stock. The option vested based on continued service to Ameresco, Inc. and performance relative to goals established for the three-year performance period from January 1, 2019 to December 31, 2021. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Board of Directors, this option vested as to 36,000 shares.

SEC source: 0001488139-25-000162 · wk-form4_1759972613.xml · nonDerivative · entry 6

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.72 to $39.82, inclusive.

SEC source: 0001488139-25-000162 · wk-form4_1759972613.xml · nonDerivative · entry 5

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,989

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: 0001488139-25-000162 · wk-form4_1759972613.xml · derivative · entry 8

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 23,598

Underlying: Class A Common Stock · 5,900 shares

Expires 2029-08-06

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.

F4 · derivative.exercise_date: On August 6, 2019, the reporting person was granted an option to purchase 40,000 shares of Class A common stock. The option vested based on continued service to Ameresco, Inc. and performance relative to goals established for the three-year performance period from January 1, 2019 to December 31, 2021. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Board of Directors, this option vested as to 36,000 shares.

SEC source: 0001488139-25-000162 · wk-form4_1759972613.xml · nonDerivative · entry 4

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.45 to $39.59, inclusive. The reporting person undertakes to provide to Ameresco, Inc., any security holder of Ameresco, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote 2 to this Form 4.

SEC source: 0001488139-25-000162 · wk-form4_1759972613.xml · nonDerivative · entry 3

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,089

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: 0001488139-25-000162 · wk-form4_1759972613.xml · derivative · entry 7

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,498

Underlying: Class A Common Stock · 5,900 shares

Expires 2029-08-06

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.

F4 · derivative.exercise_date: On August 6, 2019, the reporting person was granted an option to purchase 40,000 shares of Class A common stock. The option vested based on continued service to Ameresco, Inc. and performance relative to goals established for the three-year performance period from January 1, 2019 to December 31, 2021. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Board of Directors, this option vested as to 36,000 shares.

SEC source: 0001488139-25-000162 · wk-form4_1759972613.xml · nonDerivative · entry 2

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

SEC source: 0001488139-25-000162 · wk-form4_1759972613.xml · nonDerivative · entry 1

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,089

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: 0001488139-25-000160 · wk-form4_1759455849.xml · derivative · entry 5

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,398

Underlying: Class A Common Stock · 602 shares

Expires 2029-08-06

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.

F3 · derivative.exercise_date: On August 6, 2019, the reporting person was granted an option to purchase 40,000 shares of Class A common stock. The option vested based on continued service to Ameresco, Inc. and performance relative to goals established for the three-year performance period from January 1, 2019 to December 31, 2021. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Board of Directors, this option vested as to 36,000 shares.

SEC source: 0001488139-25-000160 · wk-form4_1759455849.xml · derivative · entry 4

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Class A Common Stock · 5,000 shares

Expires 2028-10-23

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.

F2 · derivative.exercise_date: Of the shares subject to the option, 20% vested on October 24, 2019, and the remainder vested in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-25-000160 · wk-form4_1759455849.xml · nonDerivative · entry 3

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2025.

SEC source: 0001488139-25-000160 · wk-form4_1759455849.xml · nonDerivative · entry 2

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,791

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: 0001488139-25-000160 · wk-form4_1759455849.xml · nonDerivative · entry 1

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,189

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: 0001496596-25-000004 · wk-form4_1758055813.xml · nonDerivative · entry 1

Corrsin David J · CIK 0001496596 · Director · EVP and General Counsel

10b5-1 filing: Plan reported

Ownership: Indirect · By Spouse

Disclosed balance after: 379

F1 · kind: The shares were sold pursuant to an automatic sell-to-cover instruction signed March 8, 2023 solely to cover applicable withholding taxes in connection with the vesting of RSUs.

F2 · ownership.nature: The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report should not be deemed an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001755243-25-000004 · wk-form4_1758055807.xml · nonDerivative · entry 1

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,189

F1 · kind: The shares were sold pursuant to an automatic sell-to-cover instruction signed March 7, 2023 solely to cover applicable withholding taxes in connection with the vesting of RSUs.

SEC source: 0001488139-25-000145 · wk-form4_1757542915.xml · nonDerivative · entry 2

Corrsin David J · CIK 0001496596 · Director · EVP and General Counsel

10b5-1 filing: Plan reported

Ownership: Indirect · By Spouse

Disclosed balance after: 348

F2 · kind: The shares were sold pursuant to an automatic sell-to-cover instruction signed March 8, 2023, solely to cover applicable withholding taxes in connection with the vesting of RSUs.

F1 · ownership.nature: The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report should not be deemed an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-25-000154 · wk-form4_1757713407.xml · derivative · entry 2

Bakas Michael T · CIK 0001496601 · President - Renewable Fuels

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,625

Underlying: Class A Common Stock · 875 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

F2 · derivative.exercise_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F2 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001488139-25-000154 · wk-form4_1757713407.xml · nonDerivative · entry 1

Bakas Michael T · CIK 0001496601 · President - Renewable Fuels

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,759

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: 0001488139-25-000155 · wk-form4_1757713414.xml · derivative · entry 3

Corrsin David J · CIK 0001496596 · Director · EVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Indirect · By spouse

Disclosed balance after: 200

Underlying: Class A Common Stock · 50 shares

Expires not disclosed

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.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

F3 · derivative.exercise_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F3 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F1 · ownership.nature: The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report should not be deemed an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-25-000155 · wk-form4_1757713414.xml · nonDerivative · entry 1

Corrsin David J · CIK 0001496596 · Director · EVP and General Counsel

10b5-1 filing: No plan indicated

Ownership: Indirect · By Spouse

Disclosed balance after: 398

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.

F1 · ownership.nature: The reporting person disclaims beneficial ownership of the shares held by his spouse, and this report should not be deemed an admission that the reporting person is the beneficial owner of his spouse's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-25-000159 · wk-form4_1757713441.xml · derivative · entry 4

Sakellaris George P · CIK 0001496665 · Director · President and CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,250

Underlying: Class A Common Stock · 3,750 shares

Expires not disclosed

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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

F4 · derivative.exercise_date: Each RSUs represents a contingent right to receive one share of Common Stock and vest over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F4 · derivative.expiration_date: Each RSUs represents a contingent right to receive one share of Common Stock and vest over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001488139-25-000159 · wk-form4_1757713441.xml · nonDerivative · entry 1

Sakellaris George P · CIK 0001496665 · Director · President and CEO · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 984,847

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.