Analogy 1: Amazon Web Services (AWS) for green energy infrastructure.

Analogy 2: IBM Global Services for energy sustainability.

• Energy Efficiency & Infrastructure Upgrades: Ameresco designs, develops, and implements integrated solutions to reduce energy consumption and modernize facilities for various clients.
• Renewable Energy Development & Operation: The company develops, builds, owns, and operates diverse renewable energy generation assets, including solar, wind, biomass, and landfill gas facilities.
• Energy Resiliency & Storage Solutions: Ameresco provides advanced systems such as microgrids, battery storage, and combined heat and power to enhance energy reliability, independence, and grid stability.
• Decarbonization & Sustainability Services: They offer strategic consulting and project implementation to assist clients in achieving their specific carbon reduction and environmental sustainability targets.

Ameresco (AMRC) Major Customers

Ameresco, Inc. (AMRC) primarily sells its comprehensive energy efficiency and renewable energy solutions to organizational and governmental entities, rather than individual consumers. These services include energy savings performance contracts, renewable energy asset development, infrastructure upgrades, and smart energy solutions.

Based on Ameresco's financial disclosures (e.g., Form 10-K), no single customer accounted for more than 10% of its total revenue in recent fiscal years. Therefore, specific "major customer companies" that are publicly traded and have individual stock symbols cannot be listed as they do not constitute a concentrated source of revenue for Ameresco. Instead, Ameresco's diversified customer base is broadly categorized into the following major segments:

• Federal Government: Ameresco is a significant partner for various agencies within the U.S. federal government. This includes, but is not limited to, the Department of Defense (across various branches), Department of Energy, Department of Veterans Affairs, and General Services Administration. They assist these agencies in achieving energy independence, reducing operational costs, and meeting sustainability mandates across federal facilities.

• State and Local Governments: This extensive category encompasses a wide array of public sector clients. It includes municipalities, counties, public school districts (K-12), public universities and colleges, public housing authorities, and other state-level departments and authorities. Ameresco helps these entities modernize infrastructure, improve energy efficiency, and deploy renewable energy projects for public buildings and services.

• Commercial and Industrial Clients: This segment includes a diverse range of private sector organizations. Key sub-sectors served include large commercial enterprises, industrial manufacturing facilities, data centers, healthcare organizations (hospitals, clinics, healthcare systems), and private higher education institutions. These clients typically engage Ameresco to reduce energy consumption, lower utility costs, enhance energy resiliency, and meet corporate sustainability and environmental, social, and governance (ESG) goals.

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Ameresco (AMRC) operates in several key markets related to clean energy and energy infrastructure. The addressable markets for its main products and services, primarily across North America and Europe, demonstrate significant growth potential.

Overall Addressable Market

Ameresco's target market in North America and Europe for its diversified energy solutions, encompassing energy efficiency projects, renewable energy plants, and distributed energy resources, is estimated to be approximately $70 billion in 2024. This market is projected to nearly double, reaching around $150 billion by 2033, growing at a compound annual growth rate (CAGR) of 8%.

Energy Service Company (ESCO) Market

Ameresco is a leading provider in the Energy Service Company (ESCO) market. The North American ESCO market was valued at $4.9 billion in 2021 and is expected to grow to $6.5 billion by 2027, with a CAGR of 4.8%. North America dominated the global ESCO market in 2023, driven by a strong commitment to energy efficiency and supportive regulatory frameworks. The global ESCO market was valued at $30.2 billion in 2022 and is projected to reach $59.8 billion by 2032, growing at a CAGR of 7.2%.

Microgrid Market

The global microgrid market, where Ameresco offers solutions, was valued at approximately $76.88 billion in 2023. This market is projected to grow substantially, reaching an estimated $224.34 billion by 2030, at a robust CAGR of 17.1% from 2024 to 2030. North America held the largest share of the global microgrid market in 2023, accounting for over 35% of the total revenue.

Distributed Energy Resources (DERs) / Distributed Energy Generation Market

Ameresco is also a key player in the distributed energy resources (DERs) market, which involves localized power systems like solar panels, wind turbines, and energy storage systems. The global distributed energy generation market size was estimated at $476.18 billion in 2024 and is projected to reach $713.90 billion by 2030, growing at a CAGR of 5.8% from 2025 to 2030. Another estimate places the global distributed energy generation market size at $337.4 billion in 2024, with a projection to surpass $1,176.09 billion by 2034, expanding at a CAGR of 13.30% between 2024 and 2034. The global distributed energy resources market specifically was valued at $45.65 billion in 2024 and is projected to grow to $59.77 billion by 2033, with a CAGR of 3.04% during 2025-2033. North America is a significant region within this market due to the shift towards renewable energy and government incentives.

Ameresco (AMRC) is expected to drive future revenue growth over the next two to three years through several key areas:

1. Strong and Growing Project Backlog: Ameresco has consistently reported a substantial and increasing total project backlog, which serves as a pipeline for future revenue generation. The company's focus on converting awarded projects into contracted work is a critical driver, with contracted project backlog showing significant year-over-year growth. For instance, in Q1 2025, the contracted project backlog increased by approximately 80% to $2.6 billion, indicating strong future revenue visibility. The total project backlog also reached nearly $5 billion.
2. Expansion of Energy Asset Portfolio: The growth in Ameresco's energy asset business, specifically the increase in operating energy assets placed in service, contributes significantly to recurring revenue. This segment provides long-term contracts and stable income as more assets become operational. For example, in 2024, Ameresco placed a record 241 MWe of energy assets into operation.
3. Increasing Demand for Energy Infrastructure, Particularly from Data Centers and Industrial Customers: Ameresco is capitalizing on the expanding demand for energy infrastructure solutions, notably from data centers and industrial clients. This demand is fueled by the rapid growth in AI and high-density computing, which necessitate resilient and scalable power infrastructure. Management has emphasized a significant pipeline of data center projects expected to support long-term revenue growth.
4. Growth in International Markets (Europe and Canada): The company has demonstrated strong performance and continues to expand its presence in international markets, particularly in Europe and Canada. This geographic diversification contributes to overall revenue growth.
5. Robust Operations & Maintenance (O&M) Business Growth: Ameresco's Operations & Maintenance business consistently shows growth, driven by a solid attachment rate to its expanding project base and the acquisition of new long-term O&M contracts. This segment provides a reliable stream of recurring revenue. In Q3 2025, O&M revenue increased by 8%, and the long-term O&M backlog reached approximately $1.5 billion.

Capital Allocation Decisions (Last 3-5 Years)

Share Repurchases

• Ameresco did not repurchase any shares of its common stock under its authorized repurchase program during the three months ended September 30, 2025.
• As of September 30, 2025, approximately $5.7 million remained authorized for future share repurchases under the program.
• The company's previous quarterly buyback data showed minimal activity up to Q1 2020.

Share Issuance

• In the first quarter of 2021, Ameresco completed a public equity offering, raising over $120 million to accelerate the growth of its Energy Asset business, particularly in the renewable natural gas (RNG) sector.
• The Class A common stock issued and outstanding increased from 33,716,309 shares at December 31, 2021, to 36,050,157 shares at December 31, 2023.
• Additional paid-in capital, which can reflect proceeds from stock issuances, increased from $283,982 thousand at December 31, 2021, to $320,892 thousand at December 31, 2023, and further to $378,321 thousand at December 31, 2024.

Outbound Investments

• In 2023, Ameresco made capital investments of $9.2 million, net of cash received, for an acquisition and contributed $6.0 million to joint venture investments.
• During the six months ended June 30, 2025, acquisitions, net of cash received, amounted to approximately $4.0 million (3,972 thousand).
• In the fourth quarter of 2022, Ameresco acquired a 5 MW wind farm in Ireland.

Capital Expenditures

• Ameresco's capital investments in new energy assets and major maintenance were $417.0 million and $17.1 million, respectively, in 2024. In 2023, these figures were $538.4 million and $7.6 million, and in 2022, they were $304.6 million and $18.0 million.
• For 2025, the company plans to invest approximately $350.0 million to $400.0 million in capital investments, primarily for the construction or acquisition of new renewable energy plants, with the majority expected to be funded by project finance debt, tax equity, or tax credit sales.
• For the nine months ended September 30, 2025, capital investments in energy assets were approximately $283.4 million (283,370 thousand), and capital investments in major maintenance of energy assets were approximately $16.6 million (16,624 thousand).