AMRC / Ameresco, Inc. - SEC फाइलिंग, वार्षिक रिपोर्ट, प्रॉक्सी स्टेटमेंट

अमेरेस्को, इंक.
US ˙ NYSE ˙ US02361E1082

मूलभूत आँकड़े
LEI 529900NZXZGBCBXYY327
CIK 1488139
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Ameresco, Inc.
SEC Filings (Chronological Order)
यह पृष्ठ SEC फाइलिंग की एक पूरी, कालानुक्रमिक सूची प्रदान करता है, ओनरशिप फाइलिंग को छोड़कर, जो हम अन्यत्र प्रदान करते हैं।
August 5, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco

August 4, 2025 EX-99.1

Ameresco Reports Second Quarter 2025 Financial Results Ameresco Delivered Strong Q2 Results Total Revenue and Adj. EBITDA Growth of 8% and 24%, Respectively Energy Infrastructure Opportunities Drive Total Project Backlog Above $5 billion Reiterates 2

Exhibit 99.1 Ameresco Reports Second Quarter 2025 Financial Results Ameresco Delivered Strong Q2 Results Total Revenue and Adj. EBITDA Growth of 8% and 24%, Respectively Energy Infrastructure Opportunities Drive Total Project Backlog Above $5 billion Reiterates 2025 Guidance Second Quarter 2025 Financial Highlights: •Revenues of $472.3 million •Net income attributable to common shareholders of $12

August 4, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2025 Ameresco, Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2025 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

August 4, 2025 EX-99.2

© 2025 Ameresco, Inc. All rights reserved. ameresco.com Q2 2025 Supplemental Information August 4, 2025 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., in

a2025q2supplementalslide © 2025 Ameresco, Inc. All rights reserved. ameresco.com Q2 2025 Supplemental Information August 4, 2025 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, backlog, pending agreements, financial guidance including e

June 10, 2025 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 4, 2025 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

June 10, 2025 EX-3.1

Certificate of Amendment to the Restated Certificate of Incorporation filed on June 5, 2025

finalamendmenttocharterj CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF AMERESCO, INC.

May 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresc

May 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2025 Ameresco, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2025 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number) (

May 5, 2025 EX-99.2

© 2025 Ameresco, Inc. All rights reserved. ameresco.com Q1 2025 Supplemental Information May 5, 2025 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inclu

© 2025 Ameresco, Inc. All rights reserved. ameresco.com Q1 2025 Supplemental Information May 5, 2025 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, backlog, pending agreements, financial guidance including estimated future revenues, ne

May 5, 2025 EX-99.1

Ameresco Reports First Quarter 2025 Financial Results Total Revenue and Adj. EBITDA Growth of 18% and 32%, Respectively Total Project Backlog and Contracted Backlog up 22% and 78% Y/Y, Respectively Total Revenue Visibility of Nearly $10 billion Reite

Exhibit 99.1 Ameresco Reports First Quarter 2025 Financial Results Total Revenue and Adj. EBITDA Growth of 18% and 32%, Respectively Total Project Backlog and Contracted Backlog up 22% and 78% Y/Y, Respectively Total Revenue Visibility of Nearly $10 billion Reiterates 2025 Revenue and Adjusted EBITDA Guidance First Quarter 2025 Financial Highlights: •Revenues of $352.8 million •Net loss attributab

April 24, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 24, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) þ Defin

April 10, 2025 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: þ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

February 28, 2025 EX-19.1

nsider Trading Policy

AMERESCO, INC. Insider Trading Policy 1. BACKGROUND AND PURPOSE The federal securities laws prohibit any member of the Board of Directors (a “Director”), officer (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934 (the “Exchange Act”), an “executive officer”) or employee of Ameresco, Inc. (together with its subsidiaries, the “Company”) from purchasing or selling Company securiti

February 28, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco, In

February 28, 2025 EX-21.1

Subsidiaries of Ameresco, Inc

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 1000455439 Ontario Inc. Corporation Canada 112 Lake Street Solar LLC Limited Liability Company DE 117 Lake Street Solar LLC Limited Liability Company DE 1519 Crandall Road LLC Limited Liability Company DE 1724 64th Avenue Solar LLC Limited Liability Company DE 399 Revolution Drive Solar LLC Limited Liability Company DE

February 27, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2025 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Num

February 27, 2025 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2024 Financial Results FY24 Total Revenue Growth of 29% Total Project Backlog up 24% Y/Y to $4.8 billion Record Q4 Contract Conversions of $1.1 billion Drives Y/Y Contracted Backlog up 92% Record 241 MWe

Exhibit 99.1 Ameresco Reports Fourth Quarter and Full Year 2024 Financial Results FY24 Total Revenue Growth of 29% Total Project Backlog up 24% Y/Y to $4.8 billion Record Q4 Contract Conversions of $1.1 billion Drives Y/Y Contracted Backlog up 92% Record 241 MWe Energy Assets Placed in Operation During 2024 Full Year and Fourth Quarter 2024 Financial Highlights: •Revenues of $1,769.9 million and $

February 27, 2025 EX-99.2

© 2025 Ameresco, Inc. All rights reserved. ameresco.com Q4 2024 Supplemental Information February 27, 2025 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

© 2025 Ameresco, Inc. All rights reserved. ameresco.com Q4 2024 Supplemental Information February 27, 2025 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, backlog, pending agreements, financial guidance including estimated future revenu

January 28, 2025 EX-99.1

99.1 Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Investor Relations Contact: Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Amer

99.1 Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Investor Relations Contact: Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Upsizes and Extends Corporate Senior Credit Facility The Company adds international banking partners to aid in continued European expansion. FRAM

January 28, 2025 EX-10.1

o, Inc., certain of its subsidiaries, the lenders (as defined therein), and Bank of America, N.A. as administrative agent.

Execution Version Deal CUSIP #: 02361MAL4 Revolver CUSIP #: 02361MAM2 Term Loan CUSIP #: 02361MAN0 SIXTH AMENDED AND RESTATED CREDIT AGREEMENT Dated as of January 23, 2025 among AMERESCO, INC.

January 28, 2025 EX-10.2

Amendment No. 1 dated as of January 23, 2025 to Second Lien Credit Agreement among Ameresco, inc, certain of ts subsidiaries, the lenders (as defined therein) and Nuveen EIC Administration LLC as administrative agent. Filed as Exhibit 10.2 to our Current Report on Form 8-K filed with the Commission on January 23, 2025 and incorporated herein by reference.

LEGALUSW # 182179303.6 53062.00006 EXECUTION COPY FIRST AMENDMENT TO CREDIT AGREEMENT (and Amendment to Security Agreement) This FIRST AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is made and entered into on January 23, 2025 (the “Amendment Effective Date”), by and among AMERESCO, INC., a Delaware corporation (the “Borrower”), the Guarantors party hereto, the Lenders (as defined below) party h

January 28, 2025 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 23, 2025 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

November 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ame

November 7, 2024 EX-99.1

Ameresco Reports Third Quarter 2024 Financial Results Total Revenue Growth of 49% Led by 59% Increase in Project Revenue Total Project Backlog up 22% Y/Y to $4.5 billion; Contracted Backlog up 56% Y/Y Record 209 MWe Energy Assets Placed into Operatio

Exhibit 99.1 Ameresco Reports Third Quarter 2024 Financial Results Total Revenue Growth of 49% Led by 59% Increase in Project Revenue Total Project Backlog up 22% Y/Y to $4.5 billion; Contracted Backlog up 56% Y/Y Record 209 MWe Energy Assets Placed into Operation YTD Exceeding FY Guidance New Contracts Drive $180 million Y/Y Increase in O&M Backlog Reaffirming 2024 Guidance Third Quarter 2024 Fin

November 7, 2024 EX-99.2

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q3 2024 Supplemental Information November 7, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q3 2024 Supplemental Information November 7, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, backlog, pending agreements, financial guidance including estimated future revenue

November 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

November 1, 2024 SC 13G/A

AMRC / Ameresco, Inc. / MACQUARIE GROUP LTD - SC 13G/A Passive Investment

SC 13G/A 1 d907548dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Ameresco Inc (Name of Issuer) Common Shares (Title of Class of Securities) 02361E108 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

November 1, 2024 EX-99.A

Page 8 of 13

EX-99.A 2 d907548dex99a.htm EX-99.A   EXHIBIT A AGREEMENT TO FILE JOINT ACQUISITION STATEMENTS AGREEMENT made this [7th] day of FEBRUARY, 2024 by and between Delaware Funds by Macquarie,® Optimum Fund Trust and Macquarie ETF Trust listed on Annex A hereto, Macquarie Investment Management Business Trust, Macquarie Management Holdings, Inc, and the Macquarie Parties listed on Annex B hereto (collect

November 1, 2024 EX-99.B

Page 13 of 13

EX-99.B 3 d907548dex99b.htm EX-99.B   EXHIBIT B Powers of Attorney for Macquarie Group Limited incorporated by reference to 13G filings made by Macquarie Group Limited on June 7, 2023. Page 13 of 13

September 3, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 30, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numbe

September 3, 2024 EX-99.1

Ameresco and Southern California Edison Reach Agreement on Substantial Completion Milestone for Two Battery Energy Storage Projects

Exhibit 99.1 Ameresco and Southern California Edison Reach Agreement on Substantial Completion Milestone for Two Battery Energy Storage Projects FRAMINGHAM, MASSACHUSETTS – September 3, 2024 – Ameresco, Inc., (NYSE: AMRC), a leading cleantech integrator specializing in energy efficiency and renewable energy, today announced that it has reached an agreement with Southern California Edison Company (

August 6, 2024 EX-FILING FEES

Filing Fee Table

Calculation of Filing Fee Tables S-8 Ameresco, Inc. Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity Class A Common Stock 457(o) 225,000 $ 27.51 $ 6,189,750.00 0.0001476 $ 913.61 Total Offering Amounts: $ 6,189,750.00 $

August 6, 2024 EX-10.3

Ameresco, Inc. 2017 Employee Stock Purchase Plan as amended.

1 AMENDMENT NO. 3 TO 2017 EMPLOYEE STOCK PURCHASE PLAN OF AMERESCO, INC. The 2017 Employee Stock Purchase Plan (the “Plan”) of Ameresco, Inc. (the “Company”) is hereby amended as follows (all capitalized terms used and not defined herein shall have the respective meanings ascribed to such terms in the Plan): 1. The first paragraph of the Plan is replaced in its entirety with the following: “The pu

August 6, 2024 S-8

As filed with the Securities and Exchange Commission on August 6, 2024

As filed with the Securities and Exchange Commission on August 6, 2024 Registration No.

August 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco

August 6, 2024 EX-5.,1

Opinion of Wilmer Cutler Pickering Hale and Dorr LLP, counsel to the registrant.

exhibit51 Exhibit 5.1 August 6, 2024 Ameresco, Inc. 111 Speen Street, Suite 410 Framingham, Massachusetts 01701 Re: 2017 Employee Stock Purchase Plan, as amended Ladies and Gentlemen: We have assisted in the preparation of a Registration Statement on Form S-8 (the “Registration Statement”) to be filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933,

August 5, 2024 EX-99.1

Ameresco Reports Second Quarter 2024 Financial Results Strong Revenue Growth Led by 45% Increase in Project Revenue Total Project Backlog Increased 36% Y/Y to a Record $4.4 billion; Contracted Backlog up 51% Record 155 MWe Energy Assets Placed into O

Exhibit 99.1 Ameresco Reports Second Quarter 2024 Financial Results Strong Revenue Growth Led by 45% Increase in Project Revenue Total Project Backlog Increased 36% Y/Y to a Record $4.4 billion; Contracted Backlog up 51% Record 155 MWe Energy Assets Placed into Operation During the Quarter Adjusting 2024 Guidance Second Quarter 2024 Financial Highlights: •Revenues of $438.0 million •Net income att

August 5, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

August 5, 2024 EX-99.2

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q2 2024 Supplemental Information August 5, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., in

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q2 2024 Supplemental Information August 5, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, backlog, pending agreements, financial guidance including estimated future revenues,

July 1, 2024 EX-10.1

, 2024 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), and Bank of America, N.A. as administrative agent.

amendno6tofiftharcredita Exhibit 10.1 AMENDMENT NO. 6 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT This AMENDMENT NO. 6 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT is dated as of June 28, 2024 (this “Amendment”), among AMERESCO, INC. (the “Borrower”), THE GUARANTORS PARTY HERETO (the “Guarantors” and collectively with the Borrower, the “Loan Parties”), THE LENDERS PARTY HERETO (the “Lenders”)

July 1, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 28, 2024 Ameresco, Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 28, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

July 1, 2024 EX-10.2

Second Lien Credit Agreement date as of June 28, 2024 among Ameresco, Inc, certain of its subsidiaries, the lenders (as defined therein) and Nuveen EIC Administration LLC as administrative agent. Filed as Exhibit 10.2 to our Current Report on Form 8-K filed with the Commission on June 28, 2024 and incorporated herein by reference.

secodliencreditagreement LEGALUSW # 178153830.13 Exhibit 10.2 [Execution Version] SECOND LIEN CREDIT AGREEMENT Dated as of June 28, 2024 among AMERESCO, INC., as the Borrower, CERTAIN SUBSIDIARIES OF THE BORROWER PARTY HERETO, as the Guarantors, NUVEEN EIC ADMINISTRATION LLC, as Administrative Agent, and THE LENDERS PARTY HERETO OPPENHEIMER & CO. INC. as Lead Arranger TABLE OF CONTENTS Page i ARTI

July 1, 2024 EX-99.1

Ameresco Strengthens Balance Sheet with Debt Financing from Nuveen Five Year Debt Providing Attractive Flexible Capital

Exhibit 99.1 Ameresco Strengthens Balance Sheet with Debt Financing from Nuveen Five Year Debt Providing Attractive Flexible Capital FRAMINGHAM, MA – July 1, 2024 – Ameresco, Inc., (NYSE: AMRC), a leading cleantech integrator specializing in energy efficiency and renewable energy, today announced that it has successfully secured a $100M second lien debt financing with Nuveen Energy Infrastructure

June 6, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 4, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 8, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

May 7, 2024 EX-99.1

Ameresco Reports First Quarter 2024 Financial Results Solid Execution with Growth Across All Business Lines 45% Y/Y Growth in Contracted Backlog Over 750 MWe Ameresco Owned Energy Assets in Development Reaffirms 2024 Guidance

Exhibit 99.1 Ameresco Reports First Quarter 2024 Financial Results Solid Execution with Growth Across All Business Lines 45% Y/Y Growth in Contracted Backlog Over 750 MWe Ameresco Owned Energy Assets in Development Reaffirms 2024 Guidance First Quarter 2024 Financial Highlights: •Revenues of $298.4 million •Net loss attributable to common shareholders of $2.9 million •GAAP EPS of ($0.06) •Non-GAAP

May 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number) (

May 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresc

May 7, 2024 EX-99.2

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q1 2024 Supplemental Information May 7, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inclu

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q1 2024 Supplemental Information May 7, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAA

April 23, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 23, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) þ Defin

April 10, 2024 EX-10.1

Amendment No. 5 to Fifth Amended and Restated Credit Agreement dated as of April 10, 2024 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), and Bank of America, N.A. as administrative agent.

amerescoamendmentno5tofi AMENDMENT NO. 5 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT This AMENDMENT NO. 5 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT is dated as of April 10, 2024 (this “Amendment”), among AMERESCO, INC. (the “Borrower”), THE GUARANTORS PARTY HERETO (the “Guarantors” and collectively with the Borrower, the “Loan Parties”), THE LENDERS PARTY HERETO (the “Lenders”), and BANK O

April 10, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 10, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

March 11, 2024 EX-97.1

Ameresco, Inc. Dodd-Frank Compensation Recovery Policy

1 AMERESCO, INC. Dodd-Frank Compensation Recovery Policy This Compensation Recovery Policy (this “Policy”) is adopted by Ameresco, Inc. (the “Company”) in accordance with Section 303A.14 of the New York Stock Exchange (“NYSE”) Listed Company Manual (“Section 303A.14”), which implements Rule 10D-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (as promulgated pursuant to

March 11, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K/A (Amendment No. 1) (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 00

February 29, 2024 EX-21.1

Subsidiaries of Ameresco, Inc

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 1000455439 Ontario Inc. Corporation Canada 112 Lake Street Solar LLC Limited Liability Company DE 117 Lake Street Solar LLC Limited Liability Company DE 1519 Crandall Road LLC Limited Liability Company DE 1724 64th Avenue Solar LLC Limited Liability Company DE 3901 Suitland Road Solar LLC Limited Liability Company DE 3

February 29, 2024 EX-10.11

Ameresco, Inc. Form of 2023 Executive/Employee RSU Award Agreement.

Form of executive/employee RSU Award Agreement AMERESCO, INC. Restricted Stock Unit Agreement 2020 Stock Incentive Plan Ameresco, Inc. (the “Company”) hereby grants the following restricted stock units pursuant to its 2020 Stock Incentive Plan. The terms and conditions attached hereto are also a part hereof. Notice of Grant Name of recipient (the “Participant”): Grant Date: Number of restricted st

February 29, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco, In

February 28, 2024 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2023 Financial Results Awarded Project Backlog Conversion Drives Significant Q4 Revenue and Profit Growth Record Total Project Backlog of nearly $4B, with $520M in New Awards in Q4 717 MWe of Assets in De

Exhibit 99.1 FOR IMMEDIATE RELEASE Ameresco Reports Fourth Quarter and Full Year 2023 Financial Results Awarded Project Backlog Conversion Drives Significant Q4 Revenue and Profit Growth Record Total Project Backlog of nearly $4B, with $520M in New Awards in Q4 717 MWe of Assets in Development, with 63 MWe Placed into Operation in the Quarter Guiding to 38% Adj. EBITDA Growth at the Midpoint for 2

February 28, 2024 EX-99.2

ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q4 2023 Supplemental Information February 28, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

a2023q4supplementalslide ameresco.com © 2024 Ameresco, Inc. All rights reserved. Q4 2023 Supplemental Information February 28, 2024 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility and backlog, as well as estimated future revenues, net in

February 28, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2024 Ameresco, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Num

February 14, 2024 EX-99.B

Page 13 of 13

EX-99.B 3 d747896dex99b.htm EX-99.B EXHIBIT B Powers of Attorney for Macquarie Group Limited incorporated by reference to 13G filings made by Macquarie Group Limited on June 7, 2023. Page 13 of 13

February 14, 2024 SC 13G

AMRC / Ameresco, Inc. / MACQUARIE GROUP LTD - SC 13G Passive Investment

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 0)* Ameresco Inc (Name of Issuer) Common Shares (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

February 14, 2024 EX-99.A

Page 8 of 13

EX-99.A 2 d747896dex99a.htm EX-99.A EXHIBIT A AGREEMENT TO FILE JOINT ACQUISITION STATEMENTS AGREEMENT made this [7th] day of FEBRUARY, 2024 by and between Delaware Funds by Macquarie,® Optimum Fund Trust and Macquarie ETF Trust listed on Annex A hereto, Macquarie Investment Management Business Trust, Macquarie Management Holdings, Inc, and the Macquarie Parties listed on Annex B hereto (collectiv

February 13, 2024 SC 13G/A

AMRC / Ameresco, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Ameresco, Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 02361E108 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed

February 13, 2024 SC 13G/A

AMRC / Ameresco, Inc. / Grantham, Mayo, Van Otterloo & Co. LLC - GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC / AMERESCO -- SCHEDULE 13G/A(#2) Passive Investment

SC 13G/A 1 ameresco-sch13g18792.htm GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC / AMERESCO - SCHEDULE 13G/A(#2) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) * Ameresco Inc - Class A (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2023 (Date of Event Whic

February 12, 2024 SC 13G/A

AMRC / Ameresco, Inc. / Sakellaris George P - SC 13G/A Passive Investment

SC 13G/A 1 sc13gagpsamend121.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 13)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Securities) 02361E 10 8 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement

January 31, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 31, 2024 Ameresco, Inc. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 31, 2024 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

January 31, 2024 EX-99.1

Ameresco Provides Updates on Southern California Edison Company (SCE) Projects and Financing Initiatives

Ameresco Provides Updates on Southern California Edison Company (SCE) Projects and Financing Initiatives FRAMINGHAM, MASSACHUSETTS – January 31, 2024 – Ameresco, Inc.

December 12, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 11, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Num

December 12, 2023 EX-10.1

Amendment No. 4 to Fifth Amended and Restated Credit Agreement dated as of December 11, 2023 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), and Bank of America, N.A. as Administrative Agent. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the Commission on December 11, 2023 and incorporated herein by reference.

AMENDMENT NO. 4 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT This AMENDMENT NO. 4 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT is dated as of December 11, 2023 (this “Amendment”), among AMERESCO, INC. (the “Borrower”), THE GUARANTORS PARTY HERETO (the “Guarantors” and collectively with the Borrower, the “Loan Parties”), THE LENDERS PARTY HERETO (the “Lenders”), and BANK OF AMERICA, N.A., as Ad

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ame

November 6, 2023 EX-99.2

ameresco.com © 2023 Ameresco, Inc. All rights reserved. Q3 2023 Supplemental Information November 6, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

ameresco.com © 2023 Ameresco, Inc. All rights reserved. Q3 2023 Supplemental Information November 6, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non

November 6, 2023 EX-99.1

Ameresco Reports Third Quarter 2023 Financial Results Record Total Project Backlog Increased 14% Sequentially, with $708M in New Awards Q3 Results Affected by Project Delays and Asset Downtime Secured Over $500 Million in Financing Commitments Resett

Exhibit 99.1 Ameresco Reports Third Quarter 2023 Financial Results Record Total Project Backlog Increased 14% Sequentially, with $708M in New Awards Q3 Results Affected by Project Delays and Asset Downtime Secured Over $500 Million in Financing Commitments Resetting Guidance to Reflect Continued Industry Headwinds Third Quarter 2023 Financial Highlights: •Revenues of $335.1 million •Net income att

November 6, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 6, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

October 24, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

October 3, 2023 8-K

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 28, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Nu

August 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 18, 2023 Ameresco, Inc. (E

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 18, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numbe

August 24, 2023 EX-10.1

Amendment No. 3 to Fifth Amended and Restated Credit Agreement dated as of August 24, 2023 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), BOFA Securities, Inc. as sole lead arranger and sole bookrunner and Bank of America, N.A. as administrative agent. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the Commission on August 24, 2023 and incorporated herein by reference.

ex101 AMENDMENT NO. 3 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT This AMENDMENT NO. 3 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT is dated as of August 24, 2023 (this “Amendment”), among AMERESCO, INC. (the “Borrower”), THE GUARANTORS PARTY HERETO (the “Guarantors” and collectively with the Borrower, the “Loan Parties”), THE LENDERS PARTY HERETO (the “Lenders”), and BANK OF AMERICA, N.A., a

August 1, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco

July 31, 2023 EX-99.1

Ameresco Reports Second Quarter 2023 Financial Results Record Total Project Backlog Increased 9% Sequentially, with $493M in New Awards Added a Record 113 MWe of Energy Assets into Development Significant Battery Energy Storage Project Wins and Asset

Exhibit 99.1 Ameresco Reports Second Quarter 2023 Financial Results Record Total Project Backlog Increased 9% Sequentially, with $493M in New Awards Added a Record 113 MWe of Energy Assets into Development Significant Battery Energy Storage Project Wins and Asset Activity EPA Action Supports Positive Multiyear RNG Revenue Outlook Reaffirms 2023 Guidance Second Quarter 2023 Financial Highlights: •R

July 31, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2023 Ameresco, Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

July 31, 2023 EX-99.2

ameresco.com © 2023 Ameresco, Inc. All rights reserved. Q2 2023 Supplemental Information July 31, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inc

a2023q2supplementalslide ameresco.com © 2023 Ameresco, Inc. All rights reserved. Q2 2023 Supplemental Information July 31, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility and backlog, as well as estimated future revenues, net income

June 20, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 13, 2023 Ameresco, Inc. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 13, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 11, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2023 Ameresco, Inc. (Exac

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 11, 2023 EX-99.2

Welcome to Ameresco’s Investor Day - London Safe Harbor Cautionary Language Concerning Forward-Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market

a2023investordaylondon Welcome to Ameresco’s Investor Day - London Safe Harbor Cautionary Language Concerning Forward-Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

May 11, 2023 EX-99.1

Ameresco Hosts 2023 Investor Day in London - Focused Discussion of European Growth Strategy - - Detailed 2023 and 2024 Financial Build and Metrics - - Reiterates 2023 Guidance and 2024 Adjusted EBITDA Target of $300 Million -

Exhibit 99.1 Ameresco Hosts 2023 Investor Day in London - Focused Discussion of European Growth Strategy - - Detailed 2023 and 2024 Financial Build and Metrics - - Reiterates 2023 Guidance and 2024 Adjusted EBITDA Target of $300 Million - FRAMINGHAM, Mass. – May 11, 2023, Ameresco, Inc. (NYSE:AMRC), a leading cleantech integrator specializing in energy efficiency and renewable energy, hosted its p

May 2, 2023 EX-10.1

Ameresco, Inc. Form of 2023 Executive/Employee RSU Award Agreement

ameresco-formofrsuagreem Form of executive/employee RSU Award Agreement AMERESCO, INC.

May 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresc

May 2, 2023 EX-10.3

Amendment No. 2 to Fifth Amended and Restated Credit Agreement dated March 17, 2023 among Ameresco, Inc., certain guarantors party thereto, certain lenders party thereto from time to time and Bank of America, N.A. as Administrative Agent. Filed as Exhibit 10.3 to our Form 10-Q for the quarter ended March 31, 2023 and filed with the Commission on May 2, 2023.

amerescoamendmentno2tofi AMENDMENT NO. 2 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT This AMENDMENT NO. 2 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT is dated as of March 17, 2023 (this “Amendment”), among AMERESCO, INC. (the “Borrower”), THE GUARANTORS PARTY HERETO (the “Guarantors” and collectively with the Borrower, the “Loan Parties”), THE LENDERS PARTY HERETO (the “Lenders”), and BANK O

May 1, 2023 EX-99.1

Ameresco Reports First Quarter 2023 Financial Results First Quarter Revenue Ahead and Profits in Line with Guidance Total Backlog Increased 13% Sequentially, with $472M in New Awards Placed 34 MWe of Energy Assets into Operation Reaffirms 2023 Guidan

Exhibit 99.1 Ameresco Reports First Quarter 2023 Financial Results First Quarter Revenue Ahead and Profits in Line with Guidance Total Backlog Increased 13% Sequentially, with $472M in New Awards Placed 34 MWe of Energy Assets into Operation Reaffirms 2023 Guidance First Quarter 2023 Financial Highlights: •Revenues of $271.0 million •Net income attributable to common shareholders of $1.1 million •

May 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2023 Ameresco, Inc. (Exact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number) (

May 1, 2023 EX-99.2

ameresco.com © 2023 Ameresco, Inc. All rights reserved. Q1 2023 Supplemental Information May 1, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inclu

a2023q1supplementalslide ameresco.com © 2023 Ameresco, Inc. All rights reserved. Q1 2023 Supplemental Information May 1, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility and backlog, as well as estimated future revenues, net income,

April 28, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14

April 28, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 24, 2023 EX-3.1

Second Amended and Restated By-Laws of Ameresco, Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K filed with the Commission on April 24, 2023 and incorporated herein by reference.

secondamendedandrestated SECOND AMENDED AND RESTATED BY-LAWS OF AMERESCO, INC. adopted April 25, 2000 amended and restated July 20, 2010 further amended May 22, 2014, April 19, 2023 - i - TABLE OF CONTENTS Page ARTICLE I STOCKHOLDERS ..................................................................................................1 1.1 Place of Meetings ............................................

April 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 18, 2023 Ameresco, Inc. (Ex

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 18, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

April 24, 2023 EX-99.1

Ameresco Announces Appointment of Charles R. Patton to Board of Directors New Board Appointment Expands Cleantech Integrator’s Expertise in Providing Utility and Corporate Sustainability Solutions

Exhibit 99.1 FOR IMMEDIATE RELEASE Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Ameresco Announces Appointment of Charles R. Patton to Board of Directors New Board Appointment Expands Cleantech Integrator’s Expertise in Providing Utility and Corporate Sustainability Solutions FRAMINGHAM, M.A. – April 24, 2023 – Ameresco, Inc., (NYSE: AMRC), a leading cleantech integrator

April 10, 2023 SC 13G/A

AMRC / Ameresco Inc. - Class A / Grantham, Mayo, Van Otterloo & Co. LLC - GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC / AMERESCO -- SCHEDULE 13G/A(#1) Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) Ameresco Inc - Class A (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) March 31, 2023 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this Sche

February 28, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco, In

February 28, 2023 EX-10.12

Non-Employee Director Compensation Policy. Filed as Exhibit 10.12 to our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 filed with the Commission on February 28, 2023 and incorporated herein by reference.

ex-1012amrcxboardxcomp AMERESCO, INC. BOARD OF DIRECTORS COMPENSATION (for non-employee directors) Restatement Date October 19, 2022 Eligibility All non-employee Directors Cash Compensation (effective January 1, 2023). Annual Board Retainer: $70,000 paid in advance in quarterly installments Annual Committee Retainers In addition to Annual Board Retainer, a $10,000 per year retainer for members of

February 28, 2023 EX-21.1

Subsidiaries of Ameresco, Inc

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 112 Lake Street Solar LLC Limited Liability Company DE 117 Lake Street Solar LLC Limited Liability Company DE 1519 Crandall Road LLC Limited Liability Company DE 1724 64th Avenue Solar LLC Limited Liability Company DE 3901 Suitland Road Solar LLC Limited Liability Company DE 399 Revolution Drive Solar LLC Limited Liabi

February 28, 2023 EX-10.11

Form of Non-Employee Director Restricted Stock Unit Agreement. Filed as Exhibit 10.11 to our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 filed with the Commission on February 28, 2023 and incorporated herein by reference.

EX-10.11 2 ex-1011rsuxagreementxno.htm EX-10.11 AMERESCO, INC. Restricted Stock Unit Agreement 2020 Stock Incentive Plan Ameresco, Inc. (the “Company”) hereby grants the following restricted stock units pursuant to its 2020 Stock Incentive Plan. The terms and conditions attached hereto are also a part hereof. Notice of Grant Name of recipient (the “Participant”): Grant Date: Number of restricted s

February 27, 2023 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2022 Financial Results Record Year for Revenue and Profit Fourth Quarter Results Reflected Revenue Push-Outs due to Scheduling Changes Continued European Expansion Guiding to Increased Adjusted EBITDA in

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Fourth Quarter and Full Year 2022 Financial Results Record Year for Revenue and Profit Fourth Quarter Results Reflect

February 27, 2023 EX-99.2

ameresco.com © 2022 Ameresco, Inc. All rights reserved. Q4 2022 Supplemental Information February 27, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

a2022q4supplementalslide ameresco.com © 2022 Ameresco, Inc. All rights reserved. Q4 2022 Supplemental Information February 27, 2023 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility and backlog, as well as estimated future revenues, net in

February 27, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2023 Ameresco, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Num

February 13, 2023 SC 13G

AMRC / Ameresco Inc / Grantham, Mayo, Van Otterloo & Co. LLC - GRANTHAM, MAYO, VAN OTTERLOO & CO. LLC / AMERESCO -- SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ) Ameresco Inc - Class A (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31st, 2022 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this

February 9, 2023 SC 13G/A

AMRC / Ameresco Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Ameresco Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 02361E108 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 9, 2023 SC 13G/A

AMRC / Ameresco Inc / Sakellaris George P - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 12)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Securities) 02361E 10 8 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

February 1, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 27, 2023 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

November 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

November 1, 2022 EX-99.2

ameresco.com © 2022 Ameresco, Inc. All rights reserved. Q3 2022 Supplemental Information November 1, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

ameresco.com ? 2022 Ameresco, Inc. All rights reserved. Q3 2022 Supplemental Information November 1, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, g

November 1, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ame

November 1, 2022 EX-99.1

Ameresco Reports Third Quarter 2022 Financial Results – Strong Q3 Revenue and Profit with Growth Across All Business Lines – – Inflation Reduction Act Provides Excellent Long Term Growth Opportunities – – Notable Project and Asset Wins in Europe as M

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Third Quarter 2022 Financial Results ? Strong Q3 Revenue and Profit with Growth Across All Business Lines ? ? Inflat

October 28, 2022 8-K/A

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 26, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Nu

October 27, 2022 8-K

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 26, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

August 2, 2022 EX-10.1

Amendment No. 1 to Fifth Amended and Restated Credit Agreement dated as of June 9, 2022 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), BOFA Securities, Inc. as sole lead arranger and sole bookrunner and Bank of America, N.A. as administrative agent. Filed as Exhibit 10.1 to our Form 10-Q for the quarter ended June 30, 2022 and filed with the Commission on August 2, 2023

AMENDMENT NO. 1 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT This AMENDMENT NO. 1 TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT is dated as of June 9, 2022 (this ?Amendment?), among AMERESCO, INC. (the ?Borrower?), THE GUARANTORS PARTY HERETO (the ?Guarantors? and collectively with the Borrower, the ?Loan Parties?), THE LENDERS PARTY HERETO (the ?Lenders?), and BANK OF AMERICA, N.A., as Adminis

August 2, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco

August 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

August 1, 2022 EX-99.2

ameresco.com © 2022 Ameresco, Inc. All rights reserved. Q2 2022 Supplemental Information August 1, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., in

ameresco.com ? 2022 Ameresco, Inc. All rights reserved. Q2 2022 Supplemental Information August 1, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, gro

August 1, 2022 EX-99.1

Ameresco Reports Second Quarter 2022 Financial Results – Record Q2 Revenue and Profit with Growth Across All Business Lines – – Continued Momentum in New Project Awards and Proposal Activity – – Announced Company’s Largest PV & Battery Storage Asset

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Second Quarter 2022 Financial Results ? Record Q2 Revenue and Profit with Growth Across All Business Lines ? ? Conti

June 8, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 2, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

June 8, 2022 EX-99.1

Ameresco Announces Departure of Board Member

Exhibit 99.1 FOR IMMEDIATE RELEASE Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Ameresco Announces Departure of Board Member FRAMINGHAM, M.A. ? June 08, 2022 ? Ameresco, Inc., (NYSE: AMRC), a leading cleantech integrator specializing in energy efficiency and renewable energy, today announced the resignation of Thomas Murley from its Board of Directors, effective June 30,

May 24, 2022 8-K

Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 19, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresc

May 2, 2022 EX-99.1

Ameresco Reports First Quarter 2022 Financial Results - Record Q1 Revenue and Profit - - Added Over $400 Million in New Project Awards - - Added 60 MWe to Energy Assets in Development - - Added Over $100 Million in Long-term O&M Contracts - - Reaffir

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports First Quarter 2022 Financial Results - Record Q1 Revenue and Profit - - Added Over $400 Million in New Project Award

May 2, 2022 EX-10.10

Turnkey Engineering, Procurement, Construction and Maintenance Agreement dated as of October 21, 2021, by and between Ameresco, Inc. and Southern California

Edison CW #:2264109 SCE-EPCM SCE ? [Ameresco Inc.] - i - Doc. Ver. 07/15/2021 Confidential CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS (I) NOT MATERIAL, AND (II) WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED. OMISSIONS ARE MARKED [*****]. Exhibit 10.10 Edison Agreement No. CW2264109 SCE-EPCM SCE ? Ameresco Inc. - ii - Doc. Ver. 07/15/2021 Confidential TURNKEY ENGIN

May 2, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number) (

May 2, 2022 EX-99.2

ameresco.com © 2022 Ameresco, Inc. All rights reserved. Q1 2022 Supplemental Information May 2, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inclu

ameresco.com ? 2022 Ameresco, Inc. All rights reserved. Q1 2022 Supplemental Information May 2, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, gross

April 11, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 10, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

April 11, 2022 EX-99.1

Ameresco Provides Southern California Edison (SCE) Project Update

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Provides Southern California Edison (SCE) Project Update FRAMINGHAM, M.A. ? April 10, 2022 ? Ameresco, Inc. (NYSE:AMRC), a le

April 8, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14

March 24, 2022 EX-99.1

Ameresco Hosts 2022 Investor Day - Announces 2024 Adjusted EBITDA Target of $300 Million, Double 2021 Levels – - Articulates Expanding and Rapidly Growing Addressable Markets - - Provides Details on Expected/Targeted RNG Asset Build Schedule - - Prov

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Hosts 2022 Investor Day - Announces 2024 Adjusted EBITDA Target of $300 Million, Double 2021 Levels ? - Articulates Expanding

March 24, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 23, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

March 24, 2022 EX-99.2

Welcome to Ameresco’s First Investor Day George Sakellaris CEO & President Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market

Welcome to Ameresco?s First Investor Day George Sakellaris CEO & President Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

March 4, 2022 EX-10.1

Fifth Amended and Restated Credit Agreement dated as of March 4, 2022 among Ameresco, Inc., certain of its subsidiaries, the lenders (as defined therein), BOFA Securities, Inc. as sole lead arranger and sole bookrunner and Bank of America, N.A. as Administrative Agent. Filed as Exhibit 10.1 to our Current Report on Form 8-K filed with the Commission on March 4, 2022 and incorporated herein by reference.

EXHIBIT 10.1 Execution Version 101652522v.7 Deal CUSIP #: 02361MAG5 Revolver CUSIP #:02361MAH3 Term A Loan CUSIP #:02361MAJ9 Delayed Draw Term A Loan CUSIP #:02361MAK6 FIFTH AMENDED AND RESTATED CREDIT AGREEMENT Dated as of March 4, 2022 among AMERESCO, INC., as the Borrower, CERTAIN SUBSIDIARIES OF THE BORROWER PARTY HERETO, as the Guarantors, BANK OF AMERICA, N.A., as Administrative Agent, Swing

March 4, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 4, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

March 1, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco, In

March 1, 2022 EX-21.1

Subsidiaries of Ameresco, Inc

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 112 Lake Street Solar LLC Limited Liability Company DE 117 Lake Street Solar LLC Limited Liability Company DE 1519 Crandall Road LLC Limited Liability Company DE 1724 64th Avenue Solar LLC Limited Liability Company DE 2598837 ONTARIO Inc. Corporation Canada 310 Main St. Solar LLC Limited Liability Company DE 3901 Suitl

March 1, 2022 EX-10.10

Turnkey Engineering, Procurement, Construction and Maintenance Agreement dated as of October 21, 2021, by and between Ameresco, Inc. and Southern California Edison Company.

Edison CW #:2264109 SCE-EPCM SCE ? [Ameresco Inc.] - i - Doc. Ver. 07/15/2021 Confidential CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS DOCUMENT BECAUSE IT IS (I) NOT MATERIAL, AND (II) WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED. OMISSIONS ARE MARKED [*****]. Exhibit 10.10 Edison Agreement No. CW2264109 SCE-EPCM SCE ? Ameresco Inc. - ii - Doc. Ver. 07/15/2021 Confidential TURNKEY ENGIN

February 28, 2022 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2021 Financial Results - Strong Q4 Performance Caps Another Year of Robust Growth and Profitability - - Record Total Backlog and Recurring Revenue Streams Provide Multi-Year Revenue Visibility of Over $5

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Fourth Quarter and Full Year 2021 Financial Results - Strong Q4 Performance Caps Another Year of Robust Growth and Pr

February 28, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2022 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Num

February 28, 2022 EX-99.2

ameresco.com © 2021 Ameresco, Inc. All rights reserved. Q4 2021 Supplemental Information February 28, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

ameresco.com ? 2021 Ameresco, Inc. All rights reserved. Q4 2021 Supplemental Information February 28, 2022 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS,

February 14, 2022 SC 13G/A

AMRC / Ameresco Inc / Sakellaris George P - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 11)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Securities) 02361E 10 8 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

February 14, 2022 SC 13G/A

AMRC / Ameresco Inc / Handelsbanken Fonder AB Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ) Ameresco, Inc (Name of Issuer) Common stock (Title of Class of Securities) 02361E108 (CUSIP Number) 12-31-2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 9, 2022 SC 13G

AMRC / Ameresco Inc / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Ameresco Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 02361E108 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b) ☐ R

November 2, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ame

November 1, 2021 EX-99.2

ameresco.com © 2021 Ameresco, Inc. All rights reserved. Q3 2021 Supplemental Information November 1, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.,

ameresco.com ? 2021 Ameresco, Inc. All rights reserved. Q3 2021 Supplemental Information November 1, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, o

November 1, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 1, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

November 1, 2021 EX-99.1

Ameresco Reports Third Quarter 2021 Financial Results - Diversified Model and Favorable Business Mix Drive Profit Growth - - Significant Growth in Awarded Backlog - - Announced Transformational Battery Storage Design/Build Contract - - Raising FY21 G

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Third Quarter 2021 Financial Results - Diversified Model and Favorable Business Mix Drive Profit Growth - - Signific

October 22, 2021 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

October 22, 2021 EX-99.1

Ameresco Announces an EPCM Contract for Large Distribution Battery Energy Storage Systems for a Total of 537.5 MW / 2.15 GWh Three Battery Energy Storage Systems at distribution level substations will provide California residents with electricity in

Exhibit 99.1 FOR IMMEDIATE RELEASE Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Ameresco Announces an EPCM Contract for Large Distribution Battery Energy Storage Systems for a Total of 537.5 MW / 2.15 GWh Three Battery Energy Storage Systems at distribution level substations will provide California residents with electricity in time for next summer?s reliability challenge

August 3, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco

August 2, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

August 2, 2021 EX-99.1

Ameresco Reports Second Quarter 2021 Financial Results - Robust Revenue and Profit Growth Across all Business Lines - - Gross Margin Improvement Driven by Recurring Revenue Growth - - Placed 33 MWe of Energy Assets into Operation -

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Second Quarter 2021 Financial Results - Robust Revenue and Profit Growth Across all Business Lines - - Gross Margin

August 2, 2021 EX-99.2

ameresco.com © 2021 Ameresco, Inc. All rights reserved. Q2 2021 Supplemental Information August 2, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., in

ameresco.com ? 2021 Ameresco, Inc. All rights reserved. Q2 2021 Supplemental Information August 2, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, oth

July 22, 2021 EX-99.1

Ameresco Announces Appointment of Claire Hughes Johnson to Board of Directors New Board Appointment Expands Technology Expertise for Leading Cleantech Integrator focusing on Energy Efficiency and Renewable Energy

Exhibit 99.1 FOR IMMEDIATE RELEASE Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Ameresco Announces Appointment of Claire Hughes Johnson to Board of Directors New Board Appointment Expands Technology Expertise for Leading Cleantech Integrator focusing on Energy Efficiency and Renewable Energy FRAMINGHAM, M.A. ? July 22, 2021 ? Ameresco, Inc., (NYSE: AMRC), a leading cleant

July 22, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 19, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

June 24, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 22, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

June 24, 2021 EX-10.1

Amendment No. 2 to Fourth Amended and Restated Credit and Security Agreement dated June 22, 2021 among Ameresco, Inc., certain guarantors party thereto, certain lenders party thereto from time to time and Bank of America, N.A. as Administrative Agent.

Exhibit 10.1 AMENDMENT NO. 2 TO FOURTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT This AMENDMENT NO. 2 TO FOURTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT is dated as of June 22, 2021 (this ?Amendment?), among AMERESCO, INC. (the ?Borrower?), THE GUARANTORS PARTY HERETO (the ?Guarantors? and collectively with the Borrower, the ?Loan Parties?), THE LENDERS PARTY HERETO (the ?Lender

May 25, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 20, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 5, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresc

May 4, 2021 EX-99.1

Ameresco Reports First Quarter 2021 Financial Results - Revenue and Profit Growth Exceeds Expectations - - Meaningful Pickup in Project Award Activity - - Recent Capital Raise Supports Accelerated Energy Asset Growth - - Increases 2021 Guidance -

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports First Quarter 2021 Financial Results - Revenue and Profit Growth Exceeds Expectations - - Meaningful Pickup in Proje

May 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number) (

May 4, 2021 EX-99.2

ameresco.com © 2020 Ameresco, Inc. All rights reserved. Q1 2021 Supplemental Information May 4, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inclu

ameresco.com ? 2020 Ameresco, Inc. All rights reserved. Q1 2021 Supplemental Information May 4, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues and net income, and other statements containing th

April 27, 2021 DEF 14A

- DEF 14A

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14

March 5, 2021 EX-99.1

Ameresco Announces Pricing of Public Offering of Class A Common Stock

EX-99.1 Exhibit 99.1 Media Contact: Ameresco: Leila Dillon, 508-661-2264, [email protected] Investor Relations: Eric Prouty, Advisiry Partners, 212.750.5800, [email protected] Lynn Morgen, Advisiry Partners, 212.750.5800, [email protected] Ameresco Announces Pricing of Public Offering of Class A Common Stock FRAMINGHAM, MASS. – March 4, 2021 – Ameresco, Inc., (NYSE: AMRC), a leading

March 5, 2021 EX-1.1

Underwriting Agreement, dated March 4, 2021, by and among the Company, BofA Securities, Inc., Oppenheimer & Co. Inc. and the selling stockholders of the Company named therein.

Exhibit 1.1 Execution Version AMERESCO, INC. (a Delaware corporation) 3,200,000 Shares of Class A Common Stock UNDERWRITING AGREEMENT Dated: March 4, 2021 AMERESCO, INC. (a Delaware corporation) 3,200,000 Shares of Class A Common Stock UNDERWRITING AGREEMENT March 4, 2021 BofA Securities, Inc. Oppenheimer & Co. Inc. as Representatives of the several Underwriters c/o BofA Securities, Inc. One Bryan

March 5, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 4, 2021 Ameresco, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34811 04-3512838 (State or other jurisdiction of incorporation) (Commission File Numbe

March 5, 2021 424B5

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities Offered Amount to be Registered(1) Maximum Offering Price Per Unit Maximum Aggregate Offering Price(1) Amount of Registration Fee(2) Class A Common Stock, $0.0001 par value per share 3

Table of Contents CALCULATION OF REGISTRATION FEE Title of Each Class of Securities Offered Amount to be Registered(1) Maximum Offering Price Per Unit Maximum Aggregate Offering Price(1) Amount of Registration Fee(2) Class A Common Stock, $0.

March 4, 2021 424B5

Subject to Completion Preliminary Prospectus Supplement dated March 4, 2021

Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-253878 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been filed with the Securities and Exchange Commission and is effective. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell

March 4, 2021 EX-4.5

Form of Senior Note

EX-4.5 4 d113366dex45.htm EX-4.5 Exhibit 4.5 Form of Senior Note (FACE OF SECURITY) [Each Global Security shall bear substantially the following legend: UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEP

March 4, 2021 EX-4.4

Form of Subordinated Indenture

Exhibit 4.4 AMERESCO, INC. and Trustee INDENTURE Dated as of SUBORDINATED DEBT SECURITIES CROSS-REFERENCE TABLE 1 Section of Trust Indenture Act of 1939, as amended Section of Indenture 310(a) 6.09 310(b) 6.08 6.10 310(c) Inapplicable 311(a) 6.13 311(b) 6.13 311(c) Inapplicable 312(a) 4.01 4.04 312(b) 4.04(c) 312(c) 4.04(c) 313(a) 4.03 313(b) 4.03 313(c) 4.03 313(d) 4.03 314(a) 4.02 314(b) Inappli

March 4, 2021 S-3ASR

- S-3ASR

Table of Contents As filed with the Securities and Exchange Commission on March 4, 2021 Registration No.

March 4, 2021 EX-4.3

Form of Senior Indenture

Exhibit 4.3 AMERESCO, INC. and Trustee INDENTURE Dated as of SENIOR DEBT SECURITIES CROSS-REFERENCE TABLE1 Section of Trust Indenture Act of 1939, as amended Section of Indenture 310(a) 6.09 310(b) 6.08 6.10 310(c) Inapplicable 311(a) 6.13 311(b) 6.13 311(c) Inapplicable 312(a) 4.01 4.04 312(b) 4.04(c) 312(c) 4.04(c) 313(a) 4.03 313(b) 4.03 313(c) 4.03 313(d) 4.03 314(a) 4.02 314(b) Inapplicable 3

March 4, 2021 EX-4.6

Form of Subordinated Note

Exhibit 4.6 Form of Subordinated Note (FACE OF SECURITY) [Each Global Security shall bear substantially the following legend: UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REGISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE

March 2, 2021 EX-21.1

Subsidiaries of Ameresco, Inc

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 1519 Crandall Road LLC Limited Liability Company DE 1724 64th Avenue Solar LLC Limited Liability Company DE 2598837 ONTARIO Inc. Corporation Canada 310 Main St. Solar LLC Limited Liability Company DE 3901 Suitland Road Solar LLC Limited Liability Company DE 399 Revolution Drive Solar LLC Limited Liability Company DE 51

March 2, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-34811 Ameresco, In

March 1, 2021 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2020 Financial Results - Reported Record Revenue and Profits for 2020 - - Q4 Outperformance Led by Strength in Federal Projects Group - - Energy Assets in Development Exceed 350 MWe - - Guiding to Continu

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Fourth Quarter and Full Year 2020 Financial Results - Reported Record Revenue and Profits for 2020 - - Q4 Outperforma

March 1, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 1, 2021 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

March 1, 2021 EX-99.2

ameresco.com © 2020 Ameresco, Inc. All rights reserved. Q4 2020 Supplemental Information March 1, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., inc

ameresco.com ? 2020 Ameresco, Inc. All rights reserved. Q4 2020 Supplemental Information March 1, 2021 2 Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues and net income, and other statements containing

February 12, 2021 SC 13G/A

SIGNATURE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate th

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Ameresco Inc (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

February 9, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Sec

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Securities) 02361E 10 8 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

February 3, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Ameresco, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

February 3, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Ameresco, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

November 3, 2020 EX-10.1

Executive Officer Stock Ownership Guidelines. Filed as Exhibit 10.1 to our Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2020 filed with the Commission on November 3, 2020 (file no. 001-34811) and incorporated herein by reference.

Exhibit 10.1 Ameresco Inc. Stock Ownership Guidelines The Board of Directors of Ameresco Inc. has adopted these stock ownership guidelines in order to encourage the company’s executive officers and certain other senior management members to obtain a significant ownership interest in the company, thereby helping align their interests with those of the company’s stockholders. Stock Ownership Levels

November 3, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Num

November 2, 2020 EX-99.1

Ameresco Reports Third Quarter 2020 Financial Results - Exceptional Revenue and Profit Growth - - High Utilization and Expense Control Drive Significant Operating Leverage - - Raising Full Year 2020 Guidance - - Backlog and Recurring Revenue Provide

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Third Quarter 2020 Financial Results - Exceptional Revenue and Profit Growth - - High Utilization and Expense Contro

November 2, 2020 EX-99.2

Q3 2020 Supplemental Information November 2, 2020 ameresco.com © 2020 Ameresco, Inc. All rights reserved. Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., in

ex9922020q3supplementals Q3 2020 Supplemental Information November 2, 2020 ameresco.

November 2, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2020 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

August 5, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number:

August 5, 2020 EX-10.2

Form of Incentive Stock Option Agreement granted under Ameresco, Inc. 2020 Stock Incentive Plan. Filed as Exhibit 10.2 to our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2020.

Exhibit 10.2 AMERESCO, INC. Incentive Stock Option Agreement Granted Under 2020 Stock Incentive Plan 1. Grant of Option. This agreement evidences the grant by Ameresco, Inc., a Delaware corporation (the “Company”), on (the “Grant Date”), to , an employee of the Company (the “Participant”), of an option to purchase, in whole or in part, on the terms provided herein and in the Company’s 2020 Stock I

August 5, 2020 EX-10.8

Ameresco, Inc. 2017 Employee Stock Purchase Plan, as amended. Filed as Exhibit 10.8 to our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2020 and filed with the Commission on August 4, 2020 (file no. 001-34811) and incorporated herein by reference.

Exhibit 10.8 Ameresco Inc. 2017 EMPLOYEE STOCK PURCHASE PLAN as amended The purpose of this 2017 Employee Stock Purchase Plan (this “Plan”) is to provide eligible employees of Ameresco Inc. (the “Company”) and certain of its subsidiaries with opportunities to purchase shares of the Company’s Class A common stock, $0.0001 par value per share (the “Common Stock”), commencing at the time set forth in

August 5, 2020 EX-10.3

Form of Director Stock Option Agreement granted under Ameresco, Inc. 2020 Stock Incentive Plan. Filed as Exhibit 10.3 to our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2020.

Exhibit 10.3 AMERESCO, INC. Director Stock Option Agreement Granted Under 2020 Stock Incentive Plan 1.Grant of Option. This agreement evidences the grant by Ameresco, Inc., a Delaware corporation (the “Company”), on (the “Grant Date”), to , a director of the Company (the “Participant”), of an option to purchase, in whole or in part, on the terms provided herein and in the Company’s 2020 Stock Ince

August 3, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2020 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

August 3, 2020 EX-99.2

Q2 2020 Supplemental Information August 3, 2020 ameresco.com © 2020 Ameresco, Inc. All rights reserved. Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., incl

a2020q2supplementalslide Q2 2020 Supplemental Information August 3, 2020 ameresco.

August 3, 2020 EX-99.1

Ameresco Reports Second Quarter 2020 Financial Results - Solid Company-wide Execution Mitigated COVID-19 Impacts - - Strong Double-Digit Y/Y Revenue Growth - - Enhanced Liquidity Through Financing Activity and Cash Collections - - Re-Affirms 2020 Gui

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Second Quarter 2020 Financial Results - Solid Company-wide Execution Mitigated COVID-19 Impacts - - Strong Double-Di

June 3, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 29, 2020 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 29, 2020 EX-99.2

Ameresco, Inc. 2020 Stock Incentive Plan. Filed as Exhibit 99.2 Ameresco, Inc. 2020 Stock Incentive Plan. Filed as Exhibit 99.2 to our Registration Statement on Form S-8 (reg. no. 333-238792) and incorporated herein by reference

EXHIBIT 99.2 AMERESCO, INC. 2020 STOCK INCENTIVE PLAN 1. Purpose The purpose of this 2020 Stock Incentive Plan (the “Plan”) of Ameresco, Inc., a Delaware corporation (the “Company”), is to advance the interests of the Company’s stockholders by enhancing the Company’s ability to attract, retain and motivate persons who are expected to make important contributions to the Company and by providing suc

May 29, 2020 S-8

- S-8

As filed with the Securities and Exchange Commission on May 29, 2020 Registration No.

May 29, 2020 EX-99.1

2017 Employee Stock Purchase Plan, as amended.

EXHIBIT 99.1 AMERESCO, INC. 2017 EMPLOYEE STOCK PURCHASE PLAN as amended The purpose of this 2017 Employee Stock Purchase Plan (this “Plan”) is to provide eligible employees of Ameresco Inc. (the “Company”) and certain of its subsidiaries with opportunities to purchase shares of the Company’s Class A common stock, $0.001 par value per share (the “Common Stock”), commencing at the time set forth in

May 5, 2020 EX-10.1.2

Amendment No. 1 to Fourth Amended and Restated Credit and Security Agreement dated March 31, 2020 among Ameresco, Inc., certain guarantors party thereto, certain lenders party thereto from time to time and Bank of America, N.A. as Administrative Agent. Filed as Exhibit 10.1.2 to our Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2020 and incorporated herein by reference.

Exhibit 10.1.2 AMENDMENT NO. 1 TO FOURTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT This AMENDMENT NO. 1 TO FOURTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT is dated as of March 31, 2020 (this “Amendment”), among AMERESCO, INC. (the “Borrower”), THE GUARANTORS PARTY HERETO (the “Guarantors” and collectively with the Borrower, the “Loan Parties”), THE LENDERS PARTY HERETO (the “Len

May 5, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number:

May 4, 2020 EX-99.1

Ameresco Reports First Quarter 2020 Financial Results - Strong Revenue Growth and Expense Control Drives Substantial Profit Growth - - Strong Liquidity Position to Fund Continued Growth - - Qualifies as an "Essential Service" Under Most Government Di

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports First Quarter 2020 Financial Results - Strong Revenue Growth and Expense Control Drives Substantial Profit Growth -

May 4, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

May 4, 2020 EX-99.2

Q1 2020 Supplemental Information May 4, 2020 ameresco.com © 2020 Ameresco, Inc. All rights reserved. Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., includi

a2020q1supplementalslide Q1 2020 Supplemental Information May 4, 2020 ameresco.com © 2020 Ameresco, Inc. All rights reserved. Safe Harbor Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as well as estimated future revenues and net income, and other s

April 28, 2020 DEF 14A

Definitive Proxy Statement

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14

March 6, 2020 8-K

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2020 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

March 4, 2020 EX-21.1

Subsidiaries of Ameresco, Inc.

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 1277591 ONTARIO Inc. Corporation Canada 2598837 ONTARIO Inc. Corporation Canada Aegean Drive Solar LLC Limited Liability Company Delaware Ameresco 202 South Blair Solar Inc. Corporation Canada Ameresco & Elemental Options Inc. Corporation Canada Ameresco Canada Inc. Corporation Canada Ameresco CEPEO Solar Inc. Corporat

March 4, 2020 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-

March 4, 2020 EX-4.16

Description of Ameresco, Inc. Securities Registered under Section 12 of the Exchange Act. Filed as Exhibit 4.16 to our Annual Report on Form 10-K for the year ended December 31, 2019 and filed with the Commission on March 4, 2020 and incorporated herein by reference.

Exhibit 4.16 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 Ameresco, Inc. (“Ameresco”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): our Class A common stock, par value $0.0001 per share (the “Class A common stock”). DESCRIPTION OF CLASS A COMMON

March 2, 2020 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2019 Financial Results - Company Guides to Continued Strong Growth in 2020 - - Contracted Backlog Up 52% to a Record $1.1 Billion at Year-end - - Energy Assets in Development Increased by 80% to 321 MWe -

EX-99.1 2 amrc8kex991q419.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Fourth Quarter and Full Year 2019 Financial Results - Company Guides to Co

March 2, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a8kearningreleaseq419.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 2, 2020 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Inc

March 2, 2020 EX-99.2

Q4 2019 SUPPLEMENTAL INFORMATION MARCH 2, 2020 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as we

a2019q4supplementalslide Q4 2019 SUPPLEMENTAL INFORMATION MARCH 2, 2020 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

February 13, 2020 SC 13G/A

AMRC / Ameresco, Inc. / GAGNON NEIL - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 9)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $0.0001 par value per share (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate t

February 12, 2020 SC 13G/A

AMRC / Ameresco, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* AMERESCO INC-CL A (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

February 11, 2020 SC 13G/A

AMRC / Ameresco, Inc. / Sakellaris George P - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Securities) 02361E 10 8 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate th

January 29, 2020 SC 13G/A

AMRC / Ameresco, Inc. / Wellington Trust Co NA - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Ameresco, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

January 28, 2020 SC 13G/A

AMRC / Ameresco, Inc. / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Ameresco, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02361E108 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

November 5, 2019 10-Q

AMRC / Ameresco, Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Num

November 5, 2019 EX-99.1

Ameresco Reports Third Quarter 2019 Financial Results - Record Smart Energy Solutions Awards - - Significant Growth of Ameresco Assets in Development - - Timing Issues Impact Smart Energy Solutions Revenue - - Reaffirms Full Year 2019 Guidance -

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, AdvisIRy Partners, 212.750.5800, [email protected] Lynn Morgen, AdvisIRy Partners, 212.750.5800, [email protected] Ameresco Reports Third Quarter 2019 Financial Results - Record Smart Energy Solutions Awards - - Significant Growth of Ameresco Asset

November 5, 2019 EX-99.2

Q3 2019 SUPPLEMENTAL INFORMATION NOVEMBER 5, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as

a2019q3supplementalslide Q3 2019 SUPPLEMENTAL INFORMATION NOVEMBER 5, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

November 5, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Numb

August 8, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 8, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

August 8, 2019 EX-99.1

Ameresco Reports Second Quarter 2019 Financial Results - Positioned for Strong Second Half Revenue and Earnings Comparisons - - Reaffirms Full Year 2019 Guidance - - Contracted Backlog and Assets in Development Support Future Growth -

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Eric Prouty, Advisiry Partners, 212.750.5800, [email protected] Lynn Morgen, Advisiry Partners, 212.750.5800, [email protected] Ameresco Reports Second Quarter 2019 Financial Results - Positioned for Strong Second Half Revenue and Earnings Comparisons - - Reaff

August 8, 2019 EX-99..2

Q2 2019 SUPPLEMENTAL INFORMATION AUGUST 8, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as w

a2019q2supplementalslide Q2 2019 SUPPLEMENTAL INFORMATION AUGUST 8, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

August 8, 2019 10-Q

AMRC / Ameresco, Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number:

August 8, 2019 EX-10.1

Ameresco, Inc. Executive Management Team Additional Annual Incentive Performance Program. Filed as Exhibit 10.1 to our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2019 and filed with the Commission on August 8, 2019 (file no. 001-34811) and incorporated herein by reference.

Exhibit 10.1 AMERESCO INC. EXECUTIVE MANAGEMENT TEAM ADDITIONAL ANNUAL INCENTIVE PERFORMANCE PROGRAM Background Historically, the Company’s Executive Compensation Program, as set forth in the Company’s Schedule 14A Proxy filings, has included base salaries, annual incentive bonuses, equity incentive awards, and other employee benefits. This Executive Management Team Annual Incentive Performance Pr

July 1, 2019 EX-10.1

Fourth Amended and Restated Credit and Security Agreement dated as of June 28, 2019 among Ameresco, Inc., certain guarantors party thereto, certain lenders party thereto from time to time and Bank of America, N.A. as Administrative Agent. Filed as Exhibit 10.1 to our Current Report on Form 8-k filed with the Commission on July 1, 2019 (file no. 001-34811) and incorporated herein by reference.

Exhibit 10.1 FOURTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT dated as of June 28, 2019 among AMERESCO, INC., as Borrower, THE GUARANTORS PARTY HERETO, THE LENDERS FROM TIME TO TIME PARTY HERETO, and BANK OF AMERICA, N.A., as Agent Table of Contents Page Article 1 Definitions 1 1.01. Defined Terms 1 1.02. Classification of Loans and Borrowings 33 1.03. Other Interpretive Provisions 33 1.0

July 1, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 28, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

July 1, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 1, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

July 1, 2019 EX-99.1

Ameresco Appoints Experienced Renewable Energy Executive Doran Hole As Chief Financial Officer Company’s interim CFO Mark Chiplock will continue as Vice President, Corporate Controller and Chief Accounting Officer

Exhibit 99.1 Ameresco Appoints Experienced Renewable Energy Executive Doran Hole As Chief Financial Officer Company’s interim CFO Mark Chiplock will continue as Vice President, Corporate Controller and Chief Accounting Officer FRAMINGHAM, MA - July 1, 2019 - Ameresco, Inc., (NYSE:AMRC), a leading energy efficiency and renewable energy company, today announced that Doran Hole will join the company

July 1, 2019 EX-10.1

Offer Letter between the Company and Doran Hole dated June 26, 2019. Filed as Exhibit 10.1 to our Current Report on Form 8-k filed with the Commission on July 1, 2019 (file no. 001-34811) and incorporated herein by reference.

Exhibit 10.1 June 26, 2019 Spencer Doran Hole Subject: Confirmation of Offer of Employment Dear Doran, This letter will serve to confirm our revised offer of employment to you with Ameresco, Inc. (the “Company”) and your acceptance of this offer. This offer is contingent upon a successful completion of your background check and drug screen. The following will outline the terms and conditions of yo

May 28, 2019 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 23, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number)

May 2, 2019 10-Q

AMRC / Ameresco, Inc. 10-Q Quarterly Report 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number:

April 30, 2019 EX-99.1

Ameresco Reports First Quarter 2019 Financial Results

Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Mark Chiplock, 508.661.2255, [email protected] Gary Dvorchak, CFA, The Blue Shirt Group, 323.240.5796, [email protected] Ameresco Reports First Quarter 2019 Financial Results First Quarter 2019 Financial Highlights: • Revenues of $150.1 million • Net income attributable to commo

April 30, 2019 EX-99.2

Q1 2019 SUPPLEMENTAL INFORMATION APRIL 30, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as w

a2019q1supplementalslide Q1 2019 SUPPLEMENTAL INFORMATION APRIL 30, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

April 30, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 30, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

April 29, 2019 DEF 14A

AMRC / Ameresco, Inc. DEF 14A DEF 14A

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant þ Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14

April 24, 2019 EX-99.1

Ameresco Elects Nickolas Stavropoulos to Board of Directors

Exhibit 99.1 FOR IMMEDIATE RELEASE Media Contacts: Ameresco: Leila Dillon, 508-661-2264, [email protected] Ameresco Elects Nickolas Stavropoulos to Board of Directors FRAMINGHAM, MASS.- April 24, 2019 - Ameresco, Inc., (NYSE: AMRC), a leading energy efficiency and renewable energy company, announced today that Nickolas Stavropoulos was elected to serve on its Board of Directors. Most recently, Mr.

April 24, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of Incorporation) (Commission File Number

April 24, 2019 EX-10.1

Stock Ownership Guidelines. Filed as Exhibit 10.1 to our Current Report on Form 8-k filed with the Commission on April 24, 2019 (file no. 001-34811) and incorporated herein by reference.

EX-10.1 2 a101stockownershipguidelin.htm EXHIBIT 10.1 Exhibit 10.1 Ameresco Inc. Stock Ownership Guidelines The Board of Directors of Ameresco Inc. has adopted these stock ownership guidelines in order to encourage the company’s executive officers to obtain a significant ownership interest in the company, thereby helping align their interests with those of the company’s stockholders. Stock Ownersh

March 8, 2019 10-K

AMRC / Ameresco, Inc. 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-

March 8, 2019 EX-21.1

Subsidiaries of Ameresco, Inc.

Exhibit 21.1 SUBSIDIARIES OF AMERESCO, INC. LEGAL NAME ENTITY TYPE JURISDICTION 1277591 ONTARIO Inc. Corporation Canada 2598837 ONTARIO Inc. Corporation Canada Aegean Drive Solar LLC Limited Liability Company Delaware Ameresco 202 South Blair Solar Inc. Corporation Canada Ameresco & Elemental Options Inc. Corporation Canada Ameresco Canada Inc. Corporation Canada Ameresco CEPEO Solar Inc. Corporat

March 6, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a8kearningreleaseq4183119.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 6, 2019 Ameresco, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-34811 04-3512838 (State or Other Juris- diction of

March 6, 2019 EX-99.1

Ameresco Reports Fourth Quarter and Full Year 2018 Financial Results Fourth Quarter 2018 Financial Highlights:

EX-99.1 2 amrc8kex991q418.htm EXHIBIT 99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Contact: Media Relations Leila Dillon, 508.661.2264, [email protected] Investor Relations Mark Chiplock, 508.661.2255, [email protected] Gary Dvorchak, CFA, The Blue Shirt Group, 323.240.5796, [email protected] Ameresco Reports Fourth Quarter and Full Year 2018 Financial Results Fourth Quarter 2018 Financial Highlights: • Re

March 6, 2019 EX-99.2

Q4 2018 SUPPLEMENTAL INFORMATION MARCH 6, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline and backlog, as we

a2018q4supplementalslide Q4 2018 SUPPLEMENTAL INFORMATION MARCH 6, 2019 Forward Looking Statements Any statements in this presentation about future expectations, plans and prospects for Ameresco, Inc.

February 12, 2019 SC 13G/A

AMRC / Ameresco, Inc. / Sakellaris Arthur P - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Ameresco, Inc. (Name of Issuer) Class A Common Stock, $.0001 par value per share (Title of Class of Securities) 02361E 10 8 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate th

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