AMRC

SEC source: 0001488139-24-000047 · wk-form4_1710888041.xml · nonDerivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Spouse

Disclosed balance after: 165

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 · ownership.nature: The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-24-000047 · wk-form4_1710888041.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 300

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: 0001488139-24-000045 · wk-form4_1710887996.xml · derivative · entry 3

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 590

Underlying: Class A Common Stock · 295 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: The RSUs, representing a contingent right to receive a total of 1,180 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,180 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

SEC source: 0001488139-24-000045 · wk-form4_1710887996.xml · nonDerivative · entry 1

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,856

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: 0001488139-24-000050 · wk-form4_1710888101.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: 4,918

Underlying: Class A Common Stock · 2,459 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: The RSUs, representing a contingent right to receive a total of 9.837 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

F4 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 9.837 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

SEC source: 0001488139-24-000050 · wk-form4_1710888101.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: 826,179

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: 0001488139-24-000048 · wk-form4_1710888061.xml · derivative · entry 3

Maltezos Louis P · CIK 0001496402 · Executive Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 442

Underlying: Class A Common Stock · 221 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: The RSUs, representing a contingent right to receive a total of 888 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 888 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

SEC source: 0001488139-24-000048 · wk-form4_1710888061.xml · nonDerivative · entry 1

Maltezos Louis P · CIK 0001496402 · Executive Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,362

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: 0001488139-24-000052 · wk-form4_1710888131.xml · derivative · entry 3

Chiplock Mark · CIK 0001755243 · SVP & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 553

Underlying: Class A Common Stock · 277 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: The RSUs, representing a contingent right to receive a total of 1.107 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1.107 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

SEC source: 0001488139-24-000052 · wk-form4_1710888131.xml · nonDerivative · entry 1

Chiplock Mark · CIK 0001755243 · SVP & CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 449

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: 0001488139-24-000049 · wk-form4_1710888083.xml · derivative · entry 2

Bulgarino Nicole E · CIK 0001640972 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 590

Underlying: Class A Common Stock · 295 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: The RSUs, representing a contingent right to receive a total of 1,180 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

F2 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,180 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vests in 25% increments each six months anniversary from the grant date.

SEC source: 0001488139-24-000049 · wk-form4_1710888083.xml · nonDerivative · entry 1

Bulgarino Nicole E · CIK 0001640972 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,428

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: 0001488139-24-000046 · wk-form4_1710888023.xml · derivative · entry 3

Christakis Peter · CIK 0001975772 · Executive Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 590

Underlying: Class A Common Stock · 295 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 · security: Each RSU represents a contingent right to receive one share of Ameresco, Inc. Class A Common Stock ("Common Stock").

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: The RSUs, representing a contingent right to receive a total of 1,180 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vest over two years with 25% vesting on each 6-month anniversary of the grant date.

F3 · derivative.expiration_date: The RSUs, representing a contingent right to receive a total of 1,180 shares of Common Stock, were granted to the Reporting Person on March 17, 2023 and vest over two years with 25% vesting on each 6-month anniversary of the grant date.

SEC source: 0001488139-24-000046 · wk-form4_1710888023.xml · nonDerivative · entry 1

Christakis Peter · CIK 0001975772 · Executive Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,478

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: 0001488139-24-000025 · wk-form4_1710193059.xml · derivative · entry 1

Hole Spencer Doran · CIK 0001783379 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000027 · wk-form4_1710193093.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: 504

Underlying: Class A Common Stock · 200 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: The RSUs vest over two years with 25% vesting on each 6-month anniversary of the grant date.

F4 · derivative.expiration_date: The RSUs vest over two years with 25% vesting on each 6-month anniversary of the grant date.

F2 · ownership.nature: The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-24-000027 · wk-form4_1710193093.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By spouse

Disclosed balance after: 10,000

Underlying: Class A Common Stock · 10,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

F2 · ownership.nature: The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-24-000027 · wk-form4_1710193093.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Class A Common Stock · 10,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000028 · wk-form4_1710193108.xml · derivative · entry 1

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000026 · wk-form4_1710193076.xml · derivative · entry 1

Maltezos Louis P · CIK 0001496402 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000031 · wk-form4_1710193147.xml · derivative · entry 1

Christakis Peter · CIK 0001975772 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000030 · wk-form4_1710193136.xml · derivative · entry 1

Bulgarino Nicole E · CIK 0001640972 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000029 · wk-form4_1710193123.xml · derivative · entry 1

Chiplock Mark · CIK 0001755243 · SVP & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires 2034-03-07

F1 · derivative.exercise_date: Of the shares subject to the option, 20% vest on 03.08.2025, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000003 · wk-form4_1704927912.xml · derivative · entry 4

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,750

Underlying: Class A Common Stock · 5,250 shares

Expires 2028-02-01

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 February 2, 2019, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000003 · wk-form4_1704927912.xml · derivative · entry 3

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 500 shares

Expires 2027-03-08

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 March 9, 2018, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-24-000003 · wk-form4_1704927912.xml · nonDerivative · entry 2

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,561

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: 0001488139-24-000003 · wk-form4_1704927912.xml · nonDerivative · entry 1

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,311

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: 0001488139-23-000187 · wk-form4_1703250323.xml · derivative · entry 2

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 500

Underlying: Class A Common Stock · 4,500 shares

Expires 2027-03-08

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 March 9, 2018, and the remainder vest in four equal installments on each of the subsequent four anniversaries of such date.

SEC source: 0001488139-23-000187 · wk-form4_1703250323.xml · nonDerivative · entry 1

Bakas Michael T · CIK 0001496601 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,811

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: 0001488139-23-000181 · wk-form4_1700604193.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,100,000

F6 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $29.36 to $29.69, 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 purchased at each separate price within the range set forth in this footnotes (1) and (3) through (6) to this Form 4.

F2 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000181 · wk-form4_1700604193.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,097,600

F5 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $28.29 to $29.28, inclusive.

F2 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000181 · wk-form4_1700604193.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,095,000

F4 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $28.98 to $29.58, inclusive.

F2 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000181 · wk-form4_1700604193.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,093,500

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $27.98 to $28.96, inclusive.

F2 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000181 · wk-form4_1700604193.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,092,300

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $26.97 to $27.80, inclusive.

F2 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.xml · nonDerivative · entry 7

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,090,000

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $27.10 to $27.64, 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 purchased at each separate price within the range set forth in this footnotes (1) through (4) and footnotes (6) through (8) to this Form 4.

F5 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.xml · nonDerivative · entry 6

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,089,400

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $26.13 to $27.08, inclusive.

F5 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.xml · nonDerivative · entry 5

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,085,000

F6 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $28.97 to $29.36, inclusive.

F5 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By trust

Disclosed balance after: 1,083,600

F4 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $27.92 to $28.84, inclusive.

F5 · ownership.nature: Shares held by a trust for the benefit of the reporting person's children, who share the reporting person's household. The reporting person may be deemed the beneficial owner of the shares held by the trust. The reporting person disclaims beneficial ownership of the shares held by the trust, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 823,720

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $26.65 to $27.50, inclusive.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 818,630

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $25.65 to $26.60, inclusive.

SEC source: 0001488139-23-000179 · wk-form4_1700177093.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: 814,620

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $24.65 to $25.64, inclusive.

SEC source: 0001488139-23-000176 · wk-form4_1699913410.xml · nonDerivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 813,720

F5 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $22.15 to $23.00, 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 purchased at each separate price within the range set forth in footnotes (2) to (5) to this Form 4.

SEC source: 0001488139-23-000176 · wk-form4_1699913410.xml · nonDerivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 798,720

F4 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $22.45 to $22.70, inclusive.

SEC source: 0001488139-23-000176 · wk-form4_1699913410.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 797,818

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $21.49 to $22.44, inclusive.

SEC source: 0001488139-23-000175 · wk-form4_1699913384.xml · nonDerivative · entry 1

Bulgarino Nicole E · CIK 0001640972 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,133

F1 · shares: The reporting person's purchase of Ameresco Class A common stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 110 shares, with the reporting person's sale of 110 shares of Ameresco Class A common stock at a price of $43.51 per share on September 17, 2023 pursuant to an automatic sell-to-cover instruction solely to cover applicable withholding taxes in connection with the vesting of the reporting person's RSUs granted on March 17, 2023. The reporting person has agreed to pay to Ameresco, upon settlement of the sale, $2,322.10 representing the full amount of the profit realized in connection with the short-swing transaction.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $22.28 to $22.44, 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 purchased at each separate price within the range set forth in this footnote (2) to this Form 4.

SEC source: 0001488139-23-000176 · wk-form4_1699913410.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: 793,720

F1 · kind: The reporting person's purchase of Ameresco Class A common stock reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 1,072 shares, with the reporting person's sale of 1,072 shares of Ameresco Class A common stock at a price of $43.51 per share on September 17, 2023 pursuant to an automatic sell-to-cover instruction solely to cover applicable withholding taxes in connection with the vesting of the reporting person's RSUs granted on March 17, 2023. The reporting person has agreed to pay to Ameresco, upon settlement of the sale, $22,378.01 representing the full amount of the profit realized in connection with the short-swing transaction, less transaction costs.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $22.13 to $23.04, inclusive.

SEC source: 0001488139-23-000158 · wk-form4_1695169441.xml · nonDerivative · entry 2

Hole Spencer Doran · CIK 0001783379 · EVP and CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,288

F2 · kind: The shares were sold pursuant to an automatic sell-to-cover instruction dated March 6, 2023 required to be signed solely to cover applicable withholding taxes in connection with the vesting of RSUs.

SEC source: 0001488139-23-000161 · wk-form4_1695172837.xml · nonDerivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Indirect · By Spouse

Disclosed balance after: 63

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

SEC source: 0001488139-23-000161 · wk-form4_1695172837.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 115

F1 · kind: The shares were sold pursuant to an automatic sell-to-cover instruction dated March 6, 2023 required to be signed solely to cover applicable withholding taxes in connection with the vesting of RSUs.

SEC source: 0001488139-23-000162 · wk-form4_1695173016.xml · nonDerivative · entry 2

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 773,720

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