AMRC

SEC source: 0001628280-26-036643 · wk-form4_1779232172.xml · derivative · entry 1

Maltezos Louis P · CIK 0001496402 · President-Central&West USA Can

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 30,000 shares

Expires 2036-05-18

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of May 18, 2026 over a period of five years.

SEC source: 0001628280-26-036642 · wk-form4_1779232166.xml · derivative · entry 1

Bulgarino Nicole E · CIK 0001640972 · President - Federal & Utility

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 30,000 shares

Expires 2036-05-18

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of May 18, 2026 over a period of five years.

SEC source: 0001628280-26-036644 · wk-form4_1779232178.xml · derivative · entry 4

Miller Jennifer L · CIK 0001633385 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 10,000 shares

Expires 2026-05-25

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: Of the shares subject to the option, 20% vest on May 26, 2017, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-036644 · wk-form4_1779232178.xml · nonDerivative · entry 3

Miller Jennifer L · CIK 0001633385 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 22,111

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 December 6, 2024.

F3 · balance_after: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.44 to $33.26 , 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: 0001628280-26-036644 · wk-form4_1779232178.xml · nonDerivative · entry 2

Miller Jennifer L · CIK 0001633385 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 24,469

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 December 6, 2024.

F2 · balance_after: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.57 to $32.43, inclusive.

SEC source: 0001628280-26-036644 · wk-form4_1779232178.xml · nonDerivative · entry 1

Miller Jennifer L · CIK 0001633385 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,111

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: 0001628280-26-036639 · wk-form4_1779232155.xml · derivative · entry 1

Christakis Peter · CIK 0001975772 · President-EastUSA, ProjectRisk

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 30,000 shares

Expires 2036-05-18

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of May 18, 2026 over a period of five years.

SEC source: 0001628280-26-036641 · wk-form4_1779232160.xml · derivative · entry 3

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,000

Underlying: Class A Common Stock · 1,355 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% vest on April 24, 2020, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-036641 · wk-form4_1779232160.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: 0001628280-26-036641 · wk-form4_1779232160.xml · nonDerivative · entry 1

STAVROPOULOS NICKOLAS · CIK 0001195025 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,466

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: 0001628280-26-027911 · wk-form4_1777406726.xml · derivative · entry 2

Sutton Joseph W. · CIK 0001496494 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 10,000 shares

Expires 2026-05-25

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_date: Of the shares subject to the option, 20% vest on May 26, 2017, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001628280-26-027911 · wk-form4_1777406726.xml · nonDerivative · entry 1

Sutton Joseph W. · CIK 0001496494 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,111

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: 0001628280-26-017478 · wk-form4_1773362372.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: 441

F3 · price: 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: 0001628280-26-017479 · wk-form4_1773362378.xml · nonDerivative · entry 2

Maltezos Louis P · CIK 0001496402 · President-Central&West USA Can

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,095

F1 · price: The shares were sold pursuant to an automatic sell-to-cover instruction signed September 5, 2025 solely to cover applicable withholding taxes in connection with the vesting of RSUs.

SEC source: 0001628280-26-017481 · wk-form4_1773362391.xml · nonDerivative · entry 2

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,666

F1 · price: 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: 0001628280-26-016615 · wk-form4_1773183449.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: 379

F2 · price: 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: 0001628280-26-017478 · wk-form4_1773362372.xml · derivative · entry 8

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

10b5-1 filing: Plan reported

Ownership: Indirect · By spouse

Disclosed balance after: 450

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.

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

F6 · derivative.exercise_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F6 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

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: 0001628280-26-017478 · wk-form4_1773362372.xml · derivative · entry 7

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

10b5-1 filing: Plan reported

Ownership: Indirect · By spouse

Disclosed balance after: 500

Underlying: Class A Common Stock · 350 shares

Expires not disclosed

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

F6 · derivative.exercise_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F6 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

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: 0001628280-26-017478 · wk-form4_1773362372.xml · derivative · entry 6

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

10b5-1 filing: Plan reported

Ownership: Indirect · By spouse

Disclosed balance after: 4,000

Underlying: Class A Common Stock · 4,000 shares

Expires not disclosed

F4 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F4 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

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: 0001628280-26-017478 · wk-form4_1773362372.xml · derivative · entry 5

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,500

Underlying: Class A Common Stock · 3,500 shares

Expires not disclosed

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

F6 · derivative.exercise_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F6 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001628280-26-017478 · wk-form4_1773362372.xml · derivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

F4 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F4 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017478 · wk-form4_1773362372.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: 460

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 · balance_after: The shares held following the transaction reflect a correction to a clerical error in the Form 4 filed for the March 8, 2026 RSU vesting. That filing incorrectly reported 50 shares sold under an automatic sell-to-cover instruction; the correct number of shares sold was 19.

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: 0001628280-26-017483 · wk-form4_1773362403.xml · derivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,500

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: 0001628280-26-017483 · wk-form4_1773362403.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: 21,250

Underlying: Class A Common Stock · 10,000 shares

Expires not disclosed

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: 0001628280-26-017483 · wk-form4_1773362403.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Class A Common Stock · 100,000 shares

Expires not disclosed

F2 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F2 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017483 · wk-form4_1773362403.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: 988,597

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: 0001628280-26-017480 · wk-form4_1773362385.xml · derivative · entry 4

Bakas Michael T · CIK 0001496601 · President - Renewable Fuels

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,750

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.

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.

SEC source: 0001628280-26-017480 · wk-form4_1773362385.xml · derivative · entry 3

Bakas Michael T · CIK 0001496601 · President - Renewable Fuels

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,625

Underlying: Class A Common Stock · 4,000 shares

Expires not disclosed

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.

SEC source: 0001628280-26-017480 · wk-form4_1773362385.xml · derivative · entry 2

Bakas Michael T · CIK 0001496601 · President - Renewable Fuels

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F1 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017480 · wk-form4_1773362385.xml · nonDerivative · entry 1

Bakas Michael T · CIK 0001496601 · President - Renewable Fuels

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,634

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: 0001628280-26-017479 · wk-form4_1773362378.xml · derivative · entry 5

Maltezos Louis P · CIK 0001496402 · President-Central&West USA Can

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 6,750

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.

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 RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F4 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001628280-26-017479 · wk-form4_1773362378.xml · derivative · entry 4

Maltezos Louis P · CIK 0001496402 · President-Central&West USA Can

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 7,625

Underlying: Class A Common Stock · 5,000 shares

Expires not disclosed

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 RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F4 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001628280-26-017479 · wk-form4_1773362378.xml · derivative · entry 3

Maltezos Louis P · CIK 0001496402 · President-Central&West USA Can

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

F2 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F2 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017479 · wk-form4_1773362378.xml · nonDerivative · entry 1

Maltezos Louis P · CIK 0001496402 · President-Central&West USA Can

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 32,401

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: 0001628280-26-017482 · wk-form4_1773362397.xml · derivative · entry 4

Bulgarino Nicole E · CIK 0001640972 · President - Federal & Utility

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,750

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.

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.

SEC source: 0001628280-26-017482 · wk-form4_1773362397.xml · derivative · entry 3

Bulgarino Nicole E · CIK 0001640972 · President - Federal & Utility

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,625

Underlying: Class A Common Stock · 4,000 shares

Expires not disclosed

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.

SEC source: 0001628280-26-017482 · wk-form4_1773362397.xml · derivative · entry 2

Bulgarino Nicole E · CIK 0001640972 · President - Federal & Utility

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F1 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017482 · wk-form4_1773362397.xml · nonDerivative · entry 1

Bulgarino Nicole E · CIK 0001640972 · President - Federal & Utility

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,296

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: 0001628280-26-017481 · wk-form4_1773362391.xml · derivative · entry 5

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Class A Common Stock · 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 RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F4 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001628280-26-017481 · wk-form4_1773362391.xml · derivative · entry 4

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 5,750

Underlying: Class A Common Stock · 3,500 shares

Expires not disclosed

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 RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F4 · derivative.expiration_date: Each RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

SEC source: 0001628280-26-017481 · wk-form4_1773362391.xml · derivative · entry 3

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

F2 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F2 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017481 · wk-form4_1773362391.xml · nonDerivative · entry 1

Chiplock Mark · CIK 0001755243 · EVP, CFO & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,939

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: 0001628280-26-017477 · wk-form4_1773362366.xml · derivative · entry 4

Christakis Peter · CIK 0001975772 · President-EastUSA, ProjectRisk

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,500

Underlying: Class A Common Stock · 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.

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.

SEC source: 0001628280-26-017477 · wk-form4_1773362366.xml · derivative · entry 3

Christakis Peter · CIK 0001975772 · President-EastUSA, ProjectRisk

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,250

Underlying: Class A Common Stock · 4,000 shares

Expires not disclosed

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.

SEC source: 0001628280-26-017477 · wk-form4_1773362366.xml · derivative · entry 2

Christakis Peter · CIK 0001975772 · President-EastUSA, ProjectRisk

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires not disclosed

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

F1 · derivative.expiration_date: Of the shares subject to the option, 20% vest on each of anniversary of the grant date of March 10, 2026 over a period of five years.

SEC source: 0001628280-26-017477 · wk-form4_1773362366.xml · nonDerivative · entry 1

Christakis Peter · CIK 0001975772 · President-EastUSA, ProjectRisk

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,356

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: 0001628280-26-016615 · wk-form4_1773183449.xml · derivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Indirect · By spouse

Disclosed balance after: 150

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.

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 RSU vests over two years with 25% vesting on each 6-month anniversary of the applicable grant date.

F4 · 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: 0001628280-26-016615 · wk-form4_1773183449.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: 429

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: 0001628280-26-012970 · wk-form4_1772239333.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 20,000 shares

Expires 2026-05-10

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: On May 10, 2016, the reporting person was granted an option to purchase 50,000 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, 2016 to December 31, 2018. Based on the level of achievement of these goals, as determined by Ameresco, Inc.'s Compensation Committee, this option vested as to 44,401 shares.

SEC source: 0001628280-26-012970 · wk-form4_1772239333.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,471

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.