Delivers Strong Q4 and Full Year Results

121 MWe of Energy Assets Placed in Service During the Year, Exceeding Guidance

$5 billion Project Backlog with Well Diversified Mix of Energy Infrastructure and Building Efficiency Solutions

Total Revenue Visibility Exceeds $10 Billion

Guides to Another Year of Strong Profitable Growth in 2026

Full Year and Fourth Quarter 2025 Financial Highlights:

• Revenues of $1,932.1 million and $581.0 million
• Net income attributable to common shareholders of $44.3 million and $18.4 million
• GAAP EPS of $0.83 and $0.34
• Non-GAAP EPS of $0.90 and $0.39
• Adjusted EBITDA of $237.2 million and $70.0 million

Ameresco, Inc. (NYSE: AMRC), a leading energy infrastructure solutions provider, today announced financial results for the fourth quarter ended December 31, 2025. The Company also furnished supplemental information in conjunction with this press release in a Current Report on Form 8-K. The supplemental information, which includes Non-GAAP financial measures, has been posted to the “Investors” section of the Company’s website at www.ameresco.com. Reconciliations of Non-GAAP measures to the appropriate GAAP measures are included herein. All financial result comparisons made are against the prior year period unless otherwise noted.

CEO George Sakellaris commented, “Strong fourth quarter results capped an excellent year for Ameresco in which we successfully navigated a dynamic business environment and reached the mid to high ends of our annual revenue and profit guidance ranges.

We achieved record quarterly revenue during the fourth quarter driven by our continued focus on project execution, together with the benefits of recurring revenue from our long-term Energy Asset and O&M businesses. The market for our energy infrastructure and building efficiency solutions remained robust in the fourth quarter, driving a 13% increase in awarded backlog compared to last year and signaling strong continued customer demand for our solutions. Total project backlog increased 5% to over $5 billion at year-end. Additionally, we placed 87 MWe into operation, including our 9th RNG facility, a large military solar plus storage installation and the Nucor BESS system. The Nucor asset highlights the increasing need for our solutions from energy intensive heavy industries, a large and growing opportunity for us. We also continued to selectively add additional assets into our development and construction pipeline during the quarter. Our project backlog together with our recurring Energy Asset and O&M businesses gives us over $10 billion in long-term revenue visibility, supporting our confidence in the Company’s future growth prospects.

Ameresco’s diversified mix of building efficiency and energy infrastructure Project and Energy Asset solutions continues to address key issues facing our customers, notably increased energy costs, rapidly growing energy demand and the need for energy to be highly resilient to power mission critical operations. Our decades of experience and our track record of successful execution have strengthened our competitive position, making us a go-to solutions provider,” Mr. Sakellaris concluded.

Fourth Quarter Financial Results
(All financial result comparisons made are against the prior year period unless otherwise noted.)

Total revenue was $581.0 million, up 9% year over year and represented a record quarterly result. Project revenue increased 11% to $465.9 million, driven by strong European performance and continued backlog conversion. Energy Asset revenue grew 5% to $60.7 million, reflecting the continued expansion of our operating asset portfolio, while O&M revenue increased 11% with the addition of new long-term contracts. Our other line of business, excluding the divestiture of our AEG business at the end of 2024, delivered solid year-over-year results. Gross margin improved to 16.2% reflecting both sequential and year-on-year improvement.

Interest and other expenses, net was $20.7 million, representing a decrease of 11.4%. The effective tax benefit rate was (26.0%) in 2025, compared to (58.9)% in 2024, reflecting higher taxable income and our election to sell certain investment tax credits through third-party sales, rather than retaining them for internal tax use. Net income attributable to common shareholders was $18.4 million, or $0.34 per diluted share, with Non-GAAP EPS of $0.39. Adjusted EBITDA was $70.0 million. Fourth quarter 2024 Adjusted EBITDA of $87.2 million included approximately $38 million related to the gain on the sale of AEG.

Project and Asset Highlights

Balance Sheet and Cash Flow Metrics

The Company ended 2025 with $71.8 million in unrestricted cash with total corporate debt including our subordinated debt, term loans and drawn amounts on our revolving line of credit increasing to $339.3 million. Corporate debt increased in order to support our working capital needs given the continued growth of our project and energy asset businesses. During the quarter the Company successfully executed approximately $175 million in project financing commitments. Our Energy Asset Debt was $1.5 billion with an Energy Debt Advance rate of 73% on the Energy Asset Book Value. Our Adjusted Cash from Operations during the quarter was $36.4 million. Our 8-quarter rolling average Adjusted Cash from Operations was $54.3 million.

Outlook

“We entered 2026 with positive business momentum and a more favorable operating environment than we faced at this time last year. With our diversified Project and Energy Asset offerings covering a comprehensive portfolio of building efficiency and infrastructure solutions, we believe Ameresco has the capabilities to consistently meet our global customers’ needs to increase their energy supplies, reduce their energy costs, and provide greater energy resiliency. This positioning underpins our confidence in Ameresco’s growth prospects in 2026 and beyond,” concluded CEO George Sakellaris.

The company is guiding revenue of $2.1 billion and adjusted EBITDA of $283 million at the midpoints of our ranges, representing growth of 9% and 19%, respectively. We anticipate placing approximately 100-120 MWe of energy assets in service, including 2 RNG plants. Our expected capex is $300 million to $350 million, the majority of which we expect to fund with additional energy asset debt, tax equity or tax credit sales.

The cadence of the year should follow our historical seasonal pattern, with a heavier weighting toward the second half. We expect revenues in the second half of the year to represent approximately 60% of our total revenue for 2026. This is consistent with our performance from the past couple of years.

Our first quarter is typically our seasonally lowest revenue quarter and has been further impacted by severe weather conditions. Therefore, we expect our first quarter revenue and Adjusted EBITDA to track similar to Q1 of last year. With the expected continued growth of our energy asset portfolio, depreciation and interest expenses are expected to continue to increase as those assets come into service. Given the linear nature of those costs, we expect first quarter EPS to be negative by approximately $0.30.

Conference Call/Webcast Information
The Company will host a conference call today at 4:30 p.m. ET to discuss fourth quarter 2025 financial results, business and financial outlook, and other business highlights. To participate on the day of the call, dial 1-888-596-4144, or internationally 1-646-968-2525, and enter the conference ID: 9798186, approximately 10 minutes before the call. A live, listen-only webcast of the conference call will also be available over the Internet. Individuals wishing to listen can access the call through the “Investors” section of the Company’s website at www.ameresco.com. If you are unable to listen to the live call, an archived webcast will be available on the Company’s website for one year.

Use of Non-GAAP Financial Measures
This press release and the accompanying tables include references to adjusted EBITDA, Non- GAAP EPS, Non-GAAP net income and adjusted cash from operations, which are Non-GAAP financial measures. For a description of these Non-GAAP financial measures, including the reasons management uses these measures, please see the section following the accompanying tables titled “Exhibit A: Non-GAAP Financial Measures”. For a reconciliation of these Non-GAAP financial measures to the most directly comparable financial measures prepared in accordance with GAAP, please see Non-GAAP Financial Measures and Non-GAAP Financial Guidance in the accompanying tables.

About Ameresco, Inc.
Founded in 2000, Ameresco, Inc. (NYSE: AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the global energy transition. Our comprehensive portfolio includes implementing smart energy efficiency solutions, upgrading aging infrastructure, and developing, constructing, and operating distributed energy resources. As a trusted full-service partner, Ameresco shows the way by reducing energy use and delivering diversified generation solutions to Federal, state and local governments, utilities, data centers, educational and healthcare institutions, housing authorities, and commercial and industrial customers. Headquartered in Framingham, MA, Ameresco has more than 1,500 employees providing local expertise in North America and Europe. For more information, visit www.ameresco.com.

Safe Harbor Statement
Any statements in this press release about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, backlog, pending agreements, new and expanding market opportunities, financial guidance including estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, gross margin, effective tax rate, interest rate, depreciation, tax attributes and capital investments, as well as statements about our financing plans; the impact of the OBBB Act, other policies and regulatory changes; supply chain disruptions; shortage and cost of materials and labor; other macroeconomic and geopolitical challenges; our expectations related to our agreement with SCE including the impact of delays and any requirement to pay liquidated damages; and other statements containing the words “projects,” “believes,” “anticipates,” “plans,” “expects,” “will” and similar expressions, constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those indicated by such forward looking statements as a result of various important factors, including: demand for our energy efficiency and renewable energy solutions; the timing of, and ability to, enter into contracts for awarded projects on the terms proposed or at all; the timing of work we do on projects where we recognize revenue on a percentage of completion basis; the ability to perform under signed contracts without delay and in accordance with their terms and the potential for liquidated and other damages we may be subject to; the fiscal health of the government and the impact of a prolonged government shutdown and reductions in the federal workforce; our ability to complete and operate our projects on a profitable basis and as committed to our customers; our cash flows from operations and our ability to arrange financing to fund our operations and projects; our customers’ ability to finance their projects and credit risk from our customers; our ability to comply with covenants in our existing debt agreements; the impact of macroeconomic challenges, weather related events and climate change; our reliance on third parties for our construction and installation work; availability and cost of labor and equipment particularly given global supply chain challenges, tariffs and global trade conflicts; global supply chain challenges, component shortages and inflationary pressures; changes in federal, state and local government policies and programs related to energy efficiency and renewable energy; the ability of customers to cancel or defer contracts included in our backlog; the output and performance of our energy plants and energy projects; cybersecurity incidents and breaches; regulatory and other risks inherent to constructing and operating energy assets; the effects of our acquisitions and joint ventures; seasonality in construction and in demand for our products and services; a customer’s decision to delay our work on, or other risks involved with, a particular project; the addition of new customers or the loss of existing customers; market price of our Class A Common stock prevailing from time to time; the nature of other investment opportunities presented to our Company from time to time; risks related to our international operation and international growth strategy; and other factors discussed in our most recent Annual Report on Form 10-K and our quarterly reports on Form 10-Q. The forward-looking statements included in this press release represent our views as of the date of this press release. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.

Non-GAAP Financial Measures (Unaudited, in thousands)

Non-GAAP Financial Guidance

Exhibit A: Non-GAAP Financial Measures

We use the Non-GAAP financial measures defined and discussed below to provide investors and others with useful supplemental information to our financial results prepared in accordance with GAAP. These Non-GAAP financial measures should not be considered as an alternative to any measure of financial performance calculated and presented in accordance with GAAP. For a reconciliation of these Non-GAAP measures to the most directly comparable financial measures prepared in accordance with GAAP, please see Non-GAAP Financial Measures and Non-GAAP Financial Guidance in the tables above.

We understand that, although measures similar to these Non-GAAP financial measures are frequently used by investors and securities analysts in their evaluation of companies, they have limitations as analytical tools, and investors should not consider them in isolation or as a substitute for the most directly comparable GAAP financial measures or an analysis of our results of operations as reported under GAAP. To properly and prudently evaluate our business, we encourage investors to review our GAAP financial statements included above, and not to rely on any single financial measure to evaluate our business.

Adjusted EBITDA and Adjusted EBITDA Margin

We define adjusted EBITDA as net income attributable to common shareholders, including impact from redeemable non-controlling interests, before income tax (benefit) provision, other expenses net, depreciation, amortization of intangible assets, accretion of asset retirement obligations, stock-based compensation expense, energy asset and goodwill impairment, contingent consideration, restructuring and other charges, gain or loss on sale of equity investment, and gain or loss upon deconsolidation of a variable interest entity. We believe adjusted EBITDA is useful to investors in evaluating our operating performance for the following reasons: adjusted EBITDA and similar Non-GAAP measures are widely used by investors to measure a company's operating performance without regard to items that can vary substantially from company to company depending upon financing and accounting methods, book values of assets, capital structures and the methods by which assets were acquired; securities analysts often use adjusted EBITDA and similar Non-GAAP measures as supplemental measures to evaluate the overall operating performance of companies; and by comparing our adjusted EBITDA in different historical periods, investors can evaluate our operating results without the additional variations of depreciation and amortization expense, accretion of asset retirement obligations, stock-based compensation expense, impact from redeemable non-controlling interests, contingent consideration, restructuring and asset impairment charges. We define adjusted EBITDA margin as adjusted EBITDA stated as a percentage of revenue.

Our management uses adjusted EBITDA and adjusted EBITDA margin as measures of operating performance, because they do not include the impact of items that we do not consider indicative of our core operating performance; for planning purposes, including the preparation of our annual operating budget; to allocate resources to enhance the financial performance of the business; to evaluate the effectiveness of our business strategies; and in communications with the board of directors and investors concerning our financial performance.

Non-GAAP Net Income and EPS

We define Non-GAAP net income and earnings per share (EPS) to exclude certain discrete items that management does not consider representative of our ongoing operations, including energy asset and goodwill impairment, contingent consideration, restructuring and other charges, impact from redeemable non-controlling interest, gain or loss on sale of equity investment, and gain or loss upon deconsolidation of a variable interest entity. We consider Non-GAAP net income and Non-GAAP EPS to be important indicators of our operational strength and performance of our business because they eliminate the effects of events that are not part of the Company's core operations.

Adjusted Cash from Operations

We define adjusted cash from operations as cash flows from operating activities plus proceeds from ITC sales and proceeds from Federal ESPC projects. Cash received in payment of ITC sales are, as of our fiscal year 2025, treated as investing activities under GAAP. Federal ESPC projects are treated as financing cash flows under GAAP. These cash flows, however, correspond to benefits generated by the underlying assets and projects. Thus, we believe that adjusting operating cash flow to include the cash generated from ITC sales and by our Federal ESPC projects provides investors with a useful measure for evaluating the cash generating ability of our core operating business. Our management uses adjusted cash from operations as a measure of liquidity because it captures all sources of cash associated with our operations.

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