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Ameresco, Inc.

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FY2018 Annual Report · Ameresco, Inc.
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A N N U A L   R E P O R T

2018

Printed on recycled paper.

© 2019 Ameresco, Inc. Ameresco and the Ameresco logo, the orb symbol and the tagline
“Green. Clean. Sustainable.” are registered in the U.S. Patent and Trademark Office. All rights reserved. 

in guiding every aspect of our business.
values are aligned with CARING about our stakeholders and are instrumental 
Ameresco’s values shape our culture and the way we conduct business. Our 

VALUES

passion, expertise, teamwork and a relentless focus on customer satisfaction.
creating valued, single-sourced, efficient energy solutions delivered with 
Leading the quest to change the world as the trusted sustainability partner 

MISSION

Energizing a sustainable world

VISION

VISION

Energizing a sustainable world

MISSION

Leading the quest to change the world as the trusted sustainability partner 
creating valued, single-sourced, efficient energy solutions delivered with 
passion, expertise, teamwork and a relentless focus on customer satisfaction.

VALUES

Ameresco’s values shape our culture and the way we conduct business. Our 
values are aligned with CARING about our stakeholders and are instrumental 
in guiding every aspect of our business.

“Green. Clean. Sustainable.” are registered in the U.S. Patent and Trademark Office. All rights reserved. 
© 2019 Ameresco, Inc. Ameresco and the Ameresco logo, the orb symbol and the tagline

Printed on recycled paper.

2018

ANNUAL REPORT

UNITED STATES                                                                                                                          

(Mark One) 

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

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

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, Inc.

(Exact name of registrant as specified in its charter)

Delaware

(State or Other Jurisdiction of
Incorporation or Organization)
111 Speen Street, Suite 410
Framingham, Massachusetts
(Address of Principal Executive Offices)

04-3512838

(I.R.S. Employer
Identification No.)

01701
(Zip Code)

(508) 661-2200
(Registrant’s Telephone Number, Including Area Code)
Securities registered pursuant to Section 12(b) of the Act: 

Title of each class
Class A Common Stock,
par value $0.0001 per share

Name of each exchange on which registered
New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  Yes 
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange 

     No 

     No 

Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been 
subject to such filing requirements for the past 90 days.  Yes 

     No 

 Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to 

Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such 
files).  Yes 

     No 

 Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be 
contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Annual 
Report on Form 10-K or any amendment to this Annual Report on Form 10-K.   

 Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting 
company, or an emerging growth company.  See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and 
“emerging growth company” in Rule 12b-2 of the Exchange Act. 

Large Accelerated Filer 

Accelerated Filer  

Non-accelerated filer  

Smaller reporting company 

Emerging growth company 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or 
revised financial accounting standards provided pursuent to Section 13(a) of the Exchange Act. 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes 
The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which 

     No 

the common equity was last sold on the New York Stock Exchange on June 30, 2018, the last business day of the registrant’s most recently 
completed second fiscal quarter, was $250,154,040.

Indicate the number of shares outstanding of each of the registrant’s classes of common stock as of the latest practicable date.

Class

Shares outstanding as of March 7, 2019

Class A Common Stock, $0.0001 par value per share
Class B Common Stock, $0.0001 par value per share

28,300,506
18,000,000

Portions of the definitive proxy statement for our 2019 annual meeting of stockholders are incorporated by reference into Part III.

DOCUMENTS INCORPORATED BY REFERENCE 

AMERESCO, INC.
TABLE OF CONTENTS

ITEM 1.

ITEM 1A.

ITEM 1B.

ITEM 2.

ITEM 3.

ITEM 4.

ITEM 5.

ITEM 6.

ITEM 7.

PART I
BUSINESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RISK FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UNRESOLVED STAFF COMMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PROPERTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LEGAL PROCEEDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MINE SAFETY DISCLOSURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART II

MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER 
MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES. . . . . . . . . . . . . . .

SELECTED FINANCIAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION 
AND RESULTS OF OPERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 7A.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK. . .

ITEM 8.

ITEM 9.

ITEM 9A.

ITEM 9B.

ITEM 10.

ITEM 11.

ITEM 12.

ITEM 13.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA . . . . . . . . . . . . . . . . . . .

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON 
ACCOUNTING AND FINANCIAL DISCLOSURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONTROLS AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OTHER INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART III

DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE . . . . . .

EXECUTIVE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND 
MANAGEMENT AND RELATED STOCKHOLDER MATTERS . . . . . . . . . . . . . . . . .

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 14.

PRINCIPAL ACCOUNTANT FEES AND SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . .

ITEM 15.

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES. . . . . . . . . . . . . . . . . . . . . .

SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXHIBIT INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART IV

Page

1

7

23

23

23

23

23

25

27

49

51

102

102

102

103

103

103

103

104

105

106

107

 
 
 
 
 
NOTE ABOUT FORWARD LOOKING STATEMENTS

This Annual Report on Form 10-K contains “forward-looking statements” within the meaning of Section 21E of the 
Securities Exchange Act of 1934, as amended (“the Exchange Act”). All statements, other than statements of historical fact, 
including statements regarding our strategy, future operations, future financial position, future revenues, projected costs, 
prospects, plans, objectives of management, expected market growth and other characterizations of future events or 
circumstances are forward-looking statements. These statements are often, but not exclusively, identified by the use of words 
such as “may,” “will,” “expect,” “believe,” “anticipate,” “intend,” “could,” “estimate,” “target,” “project,” “predict” or 
“continue,” and similar expressions or variations. These forward-looking statements include, among other things, statements 
about:

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

our expectations as to the future growth of our business and associated expenses;

our expectations as to revenue generation;

the future availability of borrowings under our revolving credit facility;

the expected future growth of the market for energy efficiency and renewable energy solutions;

our backlog, awarded projects and recurring revenue and the timing of such matters;

our expectations as to acquisition activity;

the impact of any restructuring;

the uses of future earnings;

our intention to repurchase shares of our Class A common stock;

the expected energy and cost savings of our projects; and

the expected energy production capacity of our renewable energy plants.

These forward-looking statements are based on current expectations and assumptions that are subject to risks, uncertainties 

and other factors that could cause actual results and the timing of certain events to differ materially and adversely from the 
future results expressed or implied by such forward-looking statements. Risks, uncertainties and factors that could cause or 
contribute to such differences include, but are not limited to, those discussed in the section titled “Risk Factors,” set forth in 
Item 1A of this Annual Report on Form 10-K and elsewhere in this report. The forward-looking statements in this Annual 
Report on Form 10-K represent our views as of the date of this Annual Report on Form 10-K. Subsequent events and 
developments may cause our views to change. However, while we may elect to update these forward-looking statements at 
some point in the future, we have no current intention of doing so and undertake no obligation to do so except to the extent 
required by applicable law. You should, therefore, not rely on these forward-looking statements as representing our views as of 
any date subsequent to the date of this Annual Report on Form 10-K.

Item 1.  Business 

Company Overview

Founded in 2000, Ameresco, Inc. is a leading independent provider of comprehensive energy services, including energy 

efficiency, infrastructure upgrades, energy security and resilience, asset sustainability and renewable energy solutions for 
businesses and organizations throughout North America and Europe.  Ameresco’s sustainability services include capital and 
operational upgrades to a facility’s energy infrastructure and the development, construction, ownership and operation of 
renewable energy plants. Ameresco has successfully completed energy saving, environmentally responsible projects with 
federal, state and local governments, healthcare and educational institutions, housing authorities, and commercial and industrial 
customers. With its corporate headquarters in Framingham, MA, Ameresco has more than 1,100 employees across more than 70 
offices providing local expertise in the United States, Canada, and the United Kingdom.

Strategic acquisitions of complementary businesses and assets have been an important part of our historical development. 

Since inception, we have completed numerous acquisitions, which have enabled us to broaden our service offerings and expand 
our geographical reach. 

Our principal service is the development, design, engineering and installation of projects that reduce the energy and 
operations and maintenance (“O&M”) costs of our customers’ facilities. These projects generally include a variety of measures 
that incorporate innovative technology and techniques, customized for the facility and designed to improve the efficiency of 
major building systems, such as heating, ventilation, cooling and lighting systems, while enhancing the comfort and usability of 
the buildings. Such measures may include a combination of the following: water reclamation, light-emitting diode (“LED”) 
lighting, smart metering, intelligent micro-grids, battery storage, combined heat and power (“CHP”) or the installation of 
renewable energy, such as solar photovoltaic (“PV”). We also offer the ability to incorporate analytical tools that provide 
improved building energy management capabilities and enable customers to identify opportunities for energy cost savings. We 
typically commit to customers that our energy efficiency projects will satisfy agreed upon performance standards upon 
installation or achieve specified increases in energy efficiency. In most cases, the forecasted lifetime energy and operating cost 
savings of the energy efficiency measures we install will defray all or almost all of the cost of such measures. In many cases, 
we assist customers in obtaining third-party financing, grants or rebates for the cost of constructing the facility improvements, 
resulting in little or no upfront capital expenditure by the customer. After a project is complete, we may operate, maintain and 
repair the customer’s energy systems under a multi-year O&M contract, which provides us with recurring revenue and visibility 
into the customer’s evolving needs.

We also serve certain customers by developing and building small-scale renewable energy plants located at or close to a 
customer’s site. Depending upon the customer’s preference, we will either retain ownership of the completed plant or build it 
for the customer. Most of our small-scale renewable energy plants to date consist of solar PV installations and plants 
constructed adjacent to landfills, that use landfill gas (“LFG”) to generate energy. We have also designed and built, as well as 
own, operate and maintain, plants that utilize biogas from wastewater treatment processes. Our largest renewable energy project 
that we operate for a customer uses biomass as the primary source of energy. In the case of most of the plants that we own, the 
electricity, thermal energy or processed renewable gas fuel generated by the plant is sold under a long-term supply contract with 
the customer, which is typically a utility, municipality, industrial facility or other purchaser of large amounts of energy. For 
information on how we finance the projects that we own and operate, please see the disclosures under Note 2, “Summary of 
Significant Accounting Policies”, Note 8,  “Long-Term Debt” and Note 10, “Investment Funds” to our Consolidated Financial 
Statements appearing in Item 8 of this Annual Report on Form 10-K.

As of December 31, 2018, we had backlog of approximately $726.6 million in expected future revenues under signed 
customer contracts for the installation or construction of projects, which we sometimes refer to as fully-contracted backlog. We 
also had been awarded projects for which we had not yet signed customer contracts, which we sometimes refer to as awarded 
projects, with estimated total future revenues of an additional $1,241.4 million. As of December 31, 2017, we had backlog of 
approximately $572.5 million in expected future revenues under signed customer contracts for the installation or construction of 
projects. We also had been awarded projects for which we had not yet signed customer contracts, with estimated total future 
revenues of an additional $1,199.0 million. As of December 31, 2016, we had backlog of approximately $534.1 million in 
expected future revenues under signed customer contracts for the installation or construction of projects. We also had been 
awarded projects for which we had not yet signed customer contracts with estimated total future revenues of an additional 
$957.6 million. The contracts reflected in our fully-contracted backlog typically have a construction period of 12 to 36 months 
and we typically expect to recognize revenue for such contracts over the same period. Where we have been awarded a project, 
but have not yet signed a customer contract for that project, we would not begin recognizing revenue unless and until a 

1customer contract has been signed and we treat the project as fully-contracted backlog. Recently, awarded projects typically 
have been taking 12 to 24 months from award to having a signed contract and thus convert to fully-contracted backlog. It may 
take longer, however, depending upon the size and complexity of the project. Generally, the larger and more complex the 
project, the longer it takes to take it from award to signed contract. Historically, approximately 90% of our awarded projects 
ultimately have resulted in a signed contract.

See “We may not recognize all revenues from our backlog or receive all payments anticipated under awarded projects and 
customer contracts” and “In order to secure contracts for new projects, we typically face a long and variable selling cycle that 
requires significant resource commitments and requires a long lead time before we realize revenues” in Item 1A, Risk Factors 
of this Annual Report on Form 10-K.

Revenues generated from backlog, which we refer to as project revenues, were $545.1 million, $506.6 million and $454.2 

million for the twelve months ended December 31, 2018, 2017 and 2016, respectively. 

We also expect to realize recurring revenues both from long-term O&M contracts and from energy output sales for 

renewable energy operating assets that we own. In addition, we expect to generate revenues from the sale of photovoltaic solar 
energy products and systems (“integrated-PV”) and other services, such as consulting services and enterprise energy 
management services. Information about revenues from these other service and product offerings may be found in Note 19, 
“Business Segment Information” of  our Consolidated Financial Statements included in Item 8 of this Annual Report on Form 
10-K, which information is incorporated herein by reference.

Ameresco’s Lines of Business

Projects

Our principal service is energy efficiency projects, which entails the design, engineering and installation of, and assisting 
with the arranging of financing for an ever-increasing array of innovative technologies and techniques to improve the energy 
efficiency, and control the operation, of a building’s energy- and water- consuming systems. In certain projects, we also design 
and construct for a customer a central plant or cogeneration system providing power, heat and/or cooling to a building, or a 
small-scale plant that produces electricity, gas, heat or cooling from renewable sources of energy. Our projects generally range 
in size and scope from a one-month project to design and retrofit a lighting system to a more complex 30-month project to 
design and install a central plant or cogeneration system or other small-scale plant. Projects we have constructed or are 
currently working on include designing, engineering and installing energy conservation measures across school buildings; large, 
complex energy conservation and energy security projects for the federal government; and municipal-scale street lighting 
projects incorporating smart-city controls.

O&M

After an energy efficiency or renewable energy project is completed, we often provide ongoing O&M services under a 

multi-year contract. These services include operating, maintaining and repairing facility energy systems such as boilers, 
chillers and building controls, as well as central power and other small-scale plants. For larger projects, we frequently maintain 
staff on-site to perform these services.

Energy Assets

Our service offering also includes the sale of electricity, processed renewable gas fuel, heat or cooling from the portfolio of 

assets that we own and operate. 

We have constructed and are currently designing and constructing a wide range of renewable energy plants using LFG, 
wastewater treatment biogas, solar, biomass, other bio-derived fuels, wind and hydro sources of energy. Most of our renewable 
energy projects to date have involved the generation of electricity from solar PV and LFG or the sale of processed LFG. We 
purchase the LFG that otherwise would be combusted or vented, process it, and either sell it or use it in our energy plants. We 
have also designed and built, as well as own, operate and maintain, plants that take biogas generated in the anaerobic digesters 
of wastewater treatment plants and turn it into renewable natural gas that is either used to generate energy on-site or that can be 
sold through the nation’s natural gas pipeline grid. Where we own and operate energy producing assets, we typically enter into a 
long-term power purchase agreement (“PPA”) for the sale of the energy.

As of December 31, 2018, we owned and operated 87 small-scale renewable energy plants and solar PV installations. Of 
the owned plants, 23 are renewable LFG plants, 2 are wastewater biogas plants, and 62 are solar PV installations. The 87 small-

2scale renewable energy plants and solar PV installations that we own have the capacity to generate electricity or deliver 
renewable gas fuel producing an aggregate of more than 228 megawatt equivalents.

Other

Our service and product offerings also include integrated-PV and consulting and enterprise energy management services.

Customer Arrangements

For our energy efficiency projects, we typically enter into energy savings performance contracts (“ESPCs”), under which 

we agree to develop, design, engineer and construct a project and also commit that the project will satisfy agreed upon 
performance standards that vary from project to project. These performance commitments are typically based on the design, 
capacity, efficiency or operation of the specific equipment and systems we install. Depending on the project, the measurement 
and demonstration may be required only once, upon installation, based on an analysis of one or more sample installations, or 
may be required to be repeated at agreed upon intervals generally over periods of up to 23 years. We often assist these 
customers in identifying and obtaining financing, through rebate programs, grant programs, third-party lenders and other 
sources.

Under our contracts, we typically do not take responsibility for a wide variety of factors outside of our control and exclude 

or adjust for such factors in commitment calculations. These factors include variations in energy prices and utility rates, 
weather, facility occupancy schedules, the amount of energy-using equipment in a facility and the failure of the customer to 
operate or maintain the project properly. Typically, our performance commitments apply to the aggregate overall performance 
of a project rather than to individual energy efficiency measures. Therefore, to the extent an individual measure underperforms, 
it may be offset by other measures that overperform during the same period. In the event that an energy efficiency project does 
not perform according to the agreed upon specifications, our agreements typically allow us to satisfy our obligation by adjusting 
or modifying the installed equipment, installing additional measures to provide substitute energy savings or paying the 
customer for lost energy savings based on the assumed conditions specified in the agreement. Many of our equipment supply, 
local design and installation subcontracts contain provisions that enable us to seek recourse against our vendors or 
subcontractors if there is a deficiency in our energy reduction commitment. See “We may have liability to our customers under 
our ESPCs if our projects fail to deliver the energy use reductions to which we are committed under the contract” in Item 1A, 
Risk Factors.

The projects that we perform for governmental agencies are governed by particular qualification and contracting regimes. 

Certain states require qualification with an appropriate state agency as a precondition to performing work or appearing as a 
qualified energy service provider for state, county and local agencies within the state. Most of the work that we perform for the 
federal government is performed under indefinite delivery, indefinite quantity (“IDIQ”) agreements between government 
agencies and us or our subsidiaries. These IDIQ agreements allow us to contract with the relevant agencies to implement energy 
projects, but no work may be performed unless we and the agency agree on a task order or delivery order governing the 
provision of a specific project. The government agencies enter into contracts for specific projects on a competitive basis. We 
and our subsidiaries and affiliates are currently party to two IDIQ agreements with the U.S. Department of Energy.  The earlier 
IDIQ was awarded in 2008 and expires in December 2019, with an aggregate maximum potential ordering amount of $5 billion 
of which we have been awarded approximately $1.3 billion to date. The latter IDIQ was awarded in April 2017 and has a base 
ordering period of 60 months (expiring in 2022) with one 18-month option period.  There is no guarantee the option will be 
exercised. The maximum value of the latter IDIQ is $55 billion and is allocated across all 4 contract holders and is inclusive of 
both the base and option period.  We are also party to similar agreements with other federal agencies, including the U.S. Army 
Corps of Engineers and the U.S. General Services Administration. Payments by the federal government for energy efficiency 
measures are based on the services provided and products installed, but are limited to the savings derived from such measures, 
calculated in accordance with federal regulatory guidelines and the specific contract terms. The savings are typically 
determined by comparing energy use and O&M costs before and after the installation of the energy efficiency measures, 
adjusted for changes that affect energy use and O&M costs but are not caused by the energy efficiency measures.

Sales and Marketing

Our sales and marketing approach is to offer customers customized and comprehensive energy efficiency solutions tailored 

to meet their economic, operational and technical needs. The sales, design and construction process for energy efficiency and 
renewable energy projects recently has been averaging from 18 to 54 months. We identify project opportunities through 
referrals, requests for proposals (“RFPs”), conferences and events, website, online campaigns, telemarketing and repeat 

3business from existing customers. Our direct sales force develops and follows up on customer leads. As of December 31, 2018, 
we had 117 employees in direct sales.

In preparation for a proposal, our team typically conducts a preliminary audit of the customer’s needs and requirements, 
and identifies areas to enhance efficiencies and reduce costs. We collect and analyze the customer’s utility bill and other data 
related to energy use. If the bills are complex or numerous, we often utilize Ameresco’s enterprise energy management software 
tools to scan, compile and analyze the information. Our experienced engineers visit and assess the customer’s current energy 
systems and infrastructure. Through our knowledge of the federal, state, local governmental and utility environment, we assess 
the availability of energy, utility or environmental-based payments for usage reductions or renewable power generation, which 
helps us optimize the economic benefits of a proposed project for a customer. Once awarded a project, we perform a more 
detailed audit of the customer’s facilities, which serves as the basis for the final specifications of the project and final contract 
terms.

For renewable energy plants that are not located on a customer’s site or use sources of energy not within the customer’s 

control, the sales process also involves the identification of sites with attractive sources of renewable energy and obtaining 
necessary rights and governmental permits to develop a plant on that site. For example, for LFG projects, we start with gaining 
control of a LFG resource located close to the prospective customer. For solar and wind projects, we look for sites where 
utilities are interested in purchasing renewable energy power at rates that are sufficient to make a project feasible. Where 
governmental agencies control the site and resource, such as a landfill owned by a municipality, the customer may be required 
to issue an RFP to use the site or resource. Once we believe we are likely to obtain the rights to the site and the resource, we 
seek customers for the energy output of the potential project, with whom we can enter into a long-term PPA.

Customers

In 2018, we served customers throughout the United States, Canada and the United Kingdom (“U.K”). Historically, 
including for the years ended December 31, 2018, 2017 and 2016, approximately 77% of our revenues have been derived from 
federal, state, provincial or local government entities, including public housing authorities and public universities. Our federal 
customers include various divisions of the U.S. federal government. The U.S. federal government, which is considered a single 
customer for reporting purposes, constituted 31.3%, 32.0% and 27.3% of our consolidated revenues for the years ended 
December 31, 2018, 2017 and 2016, respectively. For the year ended December 31, 2018, our largest 20 customers accounted 
for approximately 58.5% of our total revenues. Other than the U.S. federal government, no one customer represented more than 
10% of our revenues during this period.

See “Provisions in our government contracts may harm our business, financial condition and operating results” in Item 1A, 

Risk Factors for a discussion of special considerations applicable to government contracting.

Competition

While we face significant competition from a large number of companies, we believe few offer the objective technical 

expertise and full range of services that we provide.

Our principal competitors for our core business include Constellation NewEnergy (and Exelon Company), Energy Systems 
Group, Honeywell, Johnson Controls, NORESCO, Schneider Electric, Siemens Building Technologies, and Trane. We compete 
primarily on the basis of our comprehensive, independent offering of energy efficiency and renewable energy services and the 
breadth and depth of our expertise.

For renewable energy plants, we compete primarily with many large independent power producers and utilities, as well as a 
large number of developers of renewable energy projects. In the LFG market, our principal competitors include national project 
developers and owners of landfills who self-develop projects using LFG from their landfills. In the solar PV market, our 
principal competitors are Borrego Solar, BlueWave Solar, Citizens Energy, Clean Energy Collective, Nexamp, SunPower Corp., 
Solect Energy, and Syncarpha Capital. We compete for renewable energy projects primarily on the basis of our experience, 
reputation and ability to identify and complete high quality and cost-effective projects.

For O&M services, our principal competitors are EMCOR Group, Comfort Systems USA, Honeywell, Johnson Controls 

and Veolia. In this area, we compete primarily on the basis of our expertise and quality of service.

4See “We operate in a highly competitive industry, and our current or future competitors may be able to compete more 
effectively than we do, which could have a material adverse effect on our business, revenues, growth rates and market share” in 
Item 1A, Risk Factors for further discussion of competition.

Regulatory

Various regulations affect the conduct of our business. Federal and state legislation and regulations enable us to enter into 

ESPCs with government agencies in the United States. The applicable regulatory requirements for ESPCs differ in each state 
and between agencies of the federal government.

Our projects must conform to all applicable electric reliability, building and safety, and environmental regulations and 
codes, which vary from place to place and time to time. Various federal, state, provincial and local permits are required to 
construct an energy efficiency project or renewable energy plant.

Renewable energy projects are also subject to specific governmental safety and economic regulation. States and the federal 

government typically do not regulate the transportation or sale of LFG unless it is combined with and distributed with natural 
gas, but this is not uniform among states and may change from time to time.  States regulate the retail sale and distribution of 
natural gas to end-users, although regulatory exemptions from regulation are available in some states for limited gas delivery 
activities, such as sales only to a single customer.  The sale and distribution of electricity at the retail level is subject to state and 
provincial regulation, and the sale and transmission of electricity at the wholesale level is subject to federal regulation. While 
we do not own or operate retail-level electric distribution systems or wholesale-level transmission systems, the prices for the 
products we offer can be affected by the tariffs, rules and regulations applicable to such systems, as well as the prices that the 
owners of such systems are able to charge. The construction of power generation projects typically is regulated at the state and 
provincial levels, and the operation of these projects also may be subject to state and provincial regulation as “utilities.” At the 
federal level, the ownership and operation of, and sale of power from, generation facilities may be subject to regulation under 
the Public Utility Holding Company Act of 2005 (“PUHCA”), the Federal Power Act (“FPA”), and Public Utility Regulatory 
Policies Act of 1978 (“PURPA”). However, because all of the plants that we have constructed and operated to date are small 
power “qualifying facilities” under PURPA, they are subject to less regulation under the FPA, PUHCA and related state utility 
laws than traditional utilities.

If we pursue projects employing different technologies or with a single project electrical capacity greater than 
20 megawatts, we could become subject to some of the regulatory schemes which do not apply to our current projects. In 
addition, the state, provincial and federal regulations that govern qualifying facilities and other power sellers frequently change, 
and the effect of these changes on our business cannot be predicted.

LFG power generation facilities require an air emissions permit, which may be difficult to obtain in certain jurisdictions. 
See “Compliance with environmental laws could adversely affect our operating results” in Item 1A, Risk Factors. Renewable 
energy projects may also be eligible for certain governmental or government-related incentives from time to time, including tax 
credits, cash payments in lieu of tax credits, and the ability to sell associated environmental attributes, including carbon credits. 
Government incentives and mandates typically vary by jurisdiction.

Some of the demand reduction services we provide for utilities and institutional clients are subject to regulatory tariffs 
imposed under federal and state utility laws. In addition, the operation of, and electrical interconnection for, our renewable 
energy projects are subject to federal, state or provincial interconnection and federal reliability standards also set forth in utility 
tariffs. These tariffs specify rules, business practices and economic terms to which we are subject. The tariffs are drafted by the 
utilities and approved by the utilities’ state, provincial or federal regulatory commissions.

Employees 

As of December 31, 2018, we had a total of 1,116 employees in offices located in 34 states, the District of Columbia, four 

Canadian provinces and the U.K.

Seasonality

See “Our business is affected by seasonal trends and construction cycles, and these trends and cycles could have an adverse 

effect on our operating results” in Item 1A, Risk Factors and “Overview — Effects of Seasonality” in Item 7, Management’s 
Discussion and Analysis of Financial Condition and Results of Operations” for a discussion of seasonality in our business.

Segments and Geographic Information

5Financial information about our domestic and international operations and about our segments may be found in Note 15, 

“Geographic Information” and 19, “Business Segment Information” respectively, of our Consolidated Financial Statements 
included in Item 8 of this Annual Report on Form 10-K, which information is incorporated herein by reference.

Additional Information

Ameresco was incorporated in Delaware in 2000 and is headquartered in Framingham, Massachusetts.

Periodic reports, proxy statements and other information are available to the public, free of charge, on our website, 

www.ameresco.com, as soon as reasonably practicable after they have been filed with the Securities and Exchange Commission 
(“SEC”), and through the SEC’s website, www.sec.gov. We include our website address in this report only as an inactive textual 
reference and do not intend it to be an active link to our website. None of the material on our website is part of this Annual 
Report on Form 10-K.

Executive Officers

The following is a list of our executive officers, their ages as of March 1, 2019 and their principal positions.

Name
George P. Sakellaris . . . . . . . . . . . .
David J. Anderson . . . . . . . . . . . . . .
Michael T. Bakas. . . . . . . . . . . . . . .
Nicole A. Bulgarino . . . . . . . . . . . .
David J. Corrsin . . . . . . . . . . . . . . .
Joseph P. DeManche . . . . . . . . . . . .
Louis P. Maltezos . . . . . . . . . . . . . .
Mark A. Chiplock . . . . . . . . . . . . . .

Age

Position (s)

72 Chairman of the Board of Directors, President and Chief Executive Officer
58 Executive Vice President and Director
50 Executive Vice President, Distributed Energy Systems
46 Executive Vice President and General Manager, Federal Solutions
60 Executive Vice President, General Counsel and Secretary and Director
62 Executive Vice President, Engineering and Operations
52 Executive Vice President
49 Vice President, Interim Chief Financial Officer and Treasurer

George P. Sakellaris: Mr. Sakellaris has served as chairman of our board of directors and our president and chief executive 

officer since founding Ameresco in 2000.

David J. Anderson: Mr. Anderson has served as our executive vice president as well as a director, since 2000 and oversees 

business development, government relations, strategic marketing and communications, as well as several U.S. business units 
and U.K. operations.

Michael T. Bakas: Mr. Bakas has served as our executive vice president, distributed energy systems, since November 2017.  

Mr. Bakas previously served as our senior vice president, renewable energy, from March 2010 to September 2017 and our vice 
president, renewable energy from 2000 to February 2010.

David J. Corrsin: Mr. Corrsin has served as our executive vice president, general counsel and secretary, as well as a 

director, since 2000.

Nicole A. Bulgarino: Ms. Bulgarino has served as our executive vice president and general manager of federal solutions 
since May 2017.  Ms. Bulgarino previously served as our senior vice president and general manager of federal solutions from 
May 2015 to May 2017; vice president and general manager of federal solutions from February 2014 to May 2015; vice 
president, federal group operations from December 2012 to February 2014; director, implementation from May 2010 to 
December 2012; and senior engineer from June 2004 to May 2010. 

Joseph P. DeManche: Mr. DeManche has served as our executive vice president, engineering and operations since 2002.

Louis P. Maltezos: Mr. Maltezos has served as executive vice president since April 2009 and oversees Central and 
Northwest Regions and Canada operations. Mr. Maltezos has also served as the chief executive officer of Ameresco Canada 
since September 2015 and served as the president of Ameresco Canada from September 2014 to September 2015.

Mark A. Chiplock: Mr. Chiplock has served as our Interim Chief Financial Officer and Treasurer since October 2018 and 

has served as Vice President of Finance and Corporate Controller since April 2016. Mr. Chiplock joined the Company as 
Corporate Controller in June 2014. Prior to Ameresco, he served as Vice President, Finance of GlassHouse Technologies, a data 
center infrastructure consulting firm, from June 2012 to May 2014.

6Item 1A.  Risk Factors

Our business is subject to numerous risks. We caution you that the following important factors, among others, could cause 
our actual results to differ materially from those expressed in forward-looking statements made by us or on our behalf in filings 
with the SEC, press releases, communications with investors and oral statements. Any or all of our forward-looking statements 
in this Annual Report on Form 10-K and in any other public statements we make may turn out to be wrong. They can be 
affected by inaccurate assumptions we might make or by known or unknown risks and uncertainties. Many factors mentioned in 
the discussion below will be important in determining future results. Consequently, no forward-looking statement can be 
guaranteed. Actual future results may differ materially from those anticipated in forward-looking statements. We undertake no 
obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except 
to the extent required by applicable law. You should, however, consult any further disclosure we make in our reports filed with 
the SEC.

Risks Related to Our Business

If demand for our energy efficiency and renewable energy solutions does not develop as we expect, our revenues will suffer 
and our business will be harmed.

We believe, and our growth plans assume, that the market for energy efficiency and renewable energy solutions will 
continue to grow, that we will increase our penetration of this market and that our revenues from selling into this market will 
continue to increase over time. If our expectations as to the size of this market and our ability to sell our products and services 
in this market are not correct, our revenues will suffer and our business will be harmed.

In order to secure contracts for new projects, we typically face a long and variable selling cycle that requires significant 
resource commitments and requires a long lead time before we realize revenues.

The sales, design and construction process for energy efficiency and renewable energy projects recently has been taking 

from 18 to 54 months on average, with sales to federal government and housing authority customers tending to require the 
longest sales processes. Our existing and potential customers generally follow extended budgeting and procurement processes, 
and sometimes must engage in regulatory approval processes related to our services. Our customers often use outside 
consultants and advisors, which contributes to a longer sales cycle. Most of our potential customers issue an RFP, as part of 
their consideration of alternatives for their proposed project. In preparation for responding to an RFP, we typically conduct a 
preliminary audit of the customer’s needs and the opportunity to reduce its energy costs. For projects involving a renewable 
energy plant that is not located on a customer’s site or that uses sources of energy not within the customer’s control, the sales 
process also involves the identification of sites with attractive sources of renewable energy, such as a landfill or a favorable site 
for solar PV, and it may involve obtaining necessary rights and governmental permits to develop a project on that site. If we are 
awarded a project, we then perform a more detailed audit of the customer’s facilities, which serves as the basis for the final 
specifications of the project. We then must negotiate and execute a contract with the customer.  In addition, we or the customer 
typically need to obtain financing for the project.

This extended sales process requires the dedication of significant time by our sales and management personnel and our use 
of significant financial resources, with no certainty of success or recovery of our related expenses. A potential customer may go 
through the entire sales process and not accept our proposal. All of these factors can contribute to fluctuations in our quarterly 
financial performance and increase the likelihood that our operating results in a particular quarter will fall below investor 
expectations. These factors could also adversely affect our business, financial condition and operating results due to increased 
spending by us that is not offset by increased revenues.

7We may not recognize all revenues from our backlog or receive all payments anticipated under awarded projects and 
customer contracts.

As of December 31, 2018, we had backlog of approximately $726.6 million in expected future revenues under signed 
customer contracts for the installation or construction of projects, which we sometimes refer to as fully-contracted backlog; and 
we also had been awarded projects for which we do not yet have signed customer contracts with estimated total future revenues 
of an additional $1,241.4 million. As of December 31, 2017, we had fully-contracted backlog of approximately $572.5 million; 
and we also had awarded projects for which we had not yet have signed customer contracts with estimated total future revenues 
of an additional $1,199.0 million. As of December 31, 2016, we had fully-contracted backlog of approximately $534.1 million; 
and we also had been awarded projects for which we had not yet signed customer contracts with estimated total future revenues 
of an additional $957.6 million.

Our customers have the right under some circumstances to terminate contracts or defer the timing of our services and their 
payments to us. In addition, our government contracts are subject to the risks described below under “Provisions in government 
contracts may harm our business, financial condition and operating results.” The payment estimates for projects that have been 
awarded to us but for which we have not yet signed contracts have been prepared by management and are based upon a number 
of assumptions, including that the size and scope of the awarded projects will not change prior to the signing of customer 
contracts, that we or our customers will be able to obtain any necessary third-party financing for the awarded projects, and that 
we and our customers will reach agreement on and execute contracts for the awarded projects. We are not always able to enter 
into a contract for an awarded project on the terms proposed. As a result, we may not receive all of the revenues that we include 
in the awarded projects component of our backlog or that we estimate we will receive under awarded projects. If we do not 
receive all of the revenue we currently expect to receive, our future operating results will be adversely affected. In addition, a 
delay in the receipt of revenues, even if such revenues are eventually received, may cause our operating results for a particular 
quarter to fall below our expectations.

Revenue recognition accounting pronouncements may materially adversely affect our reported results of operations.

We continuously review our compliance with all new and existing revenue recognition accounting pronouncements.  In 

May 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-09, Revenue from 
Contracts with Customers (Topic 606) (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance.  
We adopted this guidance and its subsequent amendments effective as of January 1, 2018 using the modified retrospective 
transition approach beginning with our Quarterly Report on Form 10-Q for the first quarter of 2018. Under this approach, the 
new standard would apply to all new contracts initiated on or after January 1, 2018. For existing contracts that had remaining 
obligations as of January 1, 2018, any difference between the recognition criteria in these ASUs and the Company’s then 
current revenue recognition practices would be recognized using a cumulative effect adjustment to the opening balance of 
retained earnings.  Specifically we expect and have experienced up to a 6 month delay in the timing of revenue recognition 
related to solar renewable energy credits (“SRECs”) or renewable energy attributes, as well as changes in the timing of revenue 
recognition on contracts with uninstalled materials if a significant delay is anticipated between purchasing and installation.  See 
Recent Accounting Pronouncements in Note 2, “Summary of Significant Accounting Policies” and Note 3, “Revenue from 
Contracts with Customers” to the Consolidated Financial Statements for further information regarding ASU 2014-09.

Our business depends in part on federal, state, provincial and local government support for energy efficiency and renewable 
energy, and a decline in such support could harm our business.

We depend in part on legislation and government policies that support energy efficiency and renewable energy projects that 

enhance the economic feasibility of our energy efficiency services and small-scale renewable energy projects. This support 
includes legislation and regulations that authorize and regulate the manner in which certain governmental entities do business 
with us; encourage or subsidize governmental procurement of our services; encourage or in some cases require other customers 
to procure power from renewable or low-emission sources, to reduce their electricity use or otherwise to procure our services; 
and provide us with tax and other incentives that reduce our costs or increase our revenues. Without this support, on which 
projects frequently rely for economic feasibility, our ability to complete projects for existing customers and obtain project 
commitments from new customers could be adversely affected.

8A substantial portion of our earnings are derived from the sale of renewable energy certificates (“RECs”) and other 
environmental attributes, and our failure to be able to sell such attributes could materially adversely affect our business, 
financial condition and results of operation.

A substantial portion of our earnings are attributable to our sale of renewable energy certificates (“RECs”) and other 
environmental attributes generated by our energy assets. These attributes are used as compliance purposes for state-specific or 
U.S. federal policy.

We own and operate solar PV installations which derive a significant portion of their revenues from the sale of solar 

renewable energy certificates (“SRECs”), which are produced as a result of generating electricity. The value of these SRECs is 
determined by the supply and demand of SRECs in the states in which the solar PV installations are installed. Supply is driven 
by the amount of installations and demand is driven by state-specific laws relating to renewable portfolio standards.

We also own and operate renewable natural gas plants that may deliver biofuels into to the nation’s natural gas pipeline 

grid. Such biofuel may qualify for certain environmental attribute mechanisms, such as renewable identification numbers 
(“RINs”) which are used for compliance purposes under the Renewable Fuel Standard (“RFS”) program. The RFS is a U.S. 
federal policy that requires transportation fuel to contain a minimum volume of renewable fuel. The U.S. Environmental 
Protection Agency (“EPA”) administers the RFS program and may periodically undertake regulatory action involving the RFS, 
including annual volume standards for renewable fuel. 

We sometimes seek to sell forward a portion of our SRECs and other environmental attributes under contracts to fix 

the revenues from those attributes for financing purposes or hedge against future declines in prices of such environmental 
attributes. If our renewable energy facilities do not generate the amount of renewable energy attributes sold under such forward 
contracts or if for any reason the renewable energy we generate does not produce SRECs or other environmental attributes for a 
particular state, we may be required to make up the shortfall of SRECs or other environmental attributes under such forward 
contracts through purchases on the open market or make payments of liquidated damages.

RECs are created through state law requirements for utilities to purchase a portion of their energy from renewable 

energy sources and changes in state laws or regulation relating to RECs may adversely affect the availability of RECs or other 
environmental attributes and the future prices for RECs or other environmental attributes, which could have an adverse effect 
on our business, financial condition and results of operations.

A significant decline in the fiscal health of federal, state, provincial and local governments could reduce demand for our 
energy efficiency and renewable energy projects.

Historically, including for the years ended December 31, 2018, 2017 and 2016, more than 77% of our revenues have been 

derived from sales to federal, state, provincial or local governmental entities, including public housing authorities and public 
universities. We expect revenues from this market sector to continue to comprise a significant percentage of our revenues for 
the foreseeable future. A significant decline in the fiscal health of these existing and potential customers may make it difficult 
for them to enter into contracts for our services or to obtain financing necessary to fund such contracts, or may cause them to 
seek to renegotiate or terminate existing agreements with us. In addition, if there is a partial or full shutdown of any federal, 
state, provincial or local governing body this may adversely impact our financial performance.

Provisions in our government contracts may harm our business, financial condition and operating results.

A significant majority of our fully-contracted backlog and awarded projects is attributable to customers that are 
government entities. Our contracts with the federal government and its agencies, and with state, provincial and local 
governments, customarily contain provisions that give the government substantial rights and remedies, many of which are not 
typically found in commercial contracts, including provisions that allow the government to:

•

•

•

terminate existing contracts, in whole or in part, for any reason or no reason;

reduce or modify contracts or subcontracts;

decline to award future contracts if actual or apparent organizational conflicts of interest are discovered, or to impose
organizational conflict mitigation measures as a condition of eligibility for an award;

9•

•

suspend or debar the contractor from doing business with the government or a specific government agency; and

pursue criminal or civil remedies under the False Claims Act, False Statements Act and similar remedy provisions
unique to government contracting.

Under general principles of government contracting law, if the government terminates a contract for convenience, the 
terminated company may recover only its incurred or committed costs, settlement expenses and profit on work completed prior 
to the termination. If the government terminates a contract for default, the defaulting company is entitled to recover costs 
incurred and associated profits on accepted items only and may be liable for excess costs incurred by the government in 
procuring undelivered items from another source. In most of our contracts with the federal government, the government has 
agreed to make a payment to us in the event that it terminates the agreement early. The termination payment is designed to 
compensate us for the cost of construction plus financing costs and profit on the work completed.

In ESPCs for governmental entities, the methodologies for computing energy savings may be less favorable than for non-
governmental customers and may be modified during the contract period. We may be liable for price reductions if the projected 
savings cannot be substantiated.

In addition to the right of the federal government to terminate its contracts with us, federal government contracts are 
conditioned upon the continuing approval by Congress of the necessary spending to honor such contracts. Congress often 
appropriates funds for a program on a September 30 fiscal-year basis even though contract performance may take more than 
one year. Consequently, at the beginning of many major Governmental programs, contracts often may not be fully funded, and 
additional monies are then committed to the contract only if, as and when appropriations are made by Congress for future fiscal 
years. Similar practices are likely to also affect the availability of funding for our contracts with Canadian, as well as state, 
provincial and local government entities. If one or more of our government contracts were terminated or reduced, or if 
appropriations for the funding of one or more of our contracts is delayed or terminated, our business, financial condition and 
operating results could be adversely affected.

Our senior credit facility, project financing term loans and construction loans contain financial and operating restrictions 
that may limit our business activities and our access to credit.

Provisions in our senior credit facility, project financing term loans and construction loans impose customary restrictions 
on our and certain of our subsidiaries’ business activities and uses of cash and other collateral. These agreements also contain 
other customary covenants, including covenants that require us to meet specified financial ratios and financial tests.

We have a $85 million revolving senior secured credit facility that matures June 2020, subject to the quarter end ratio 
covenant described below. This facility may not be sufficient to meet our needs as our business grows, and we may be unable to 
extend or replace it on acceptable terms, or at all.  Under the revolving credit facility we are required to maintain a maximum 
ratio of total funded debt to EBITDA (as defined in the agreement) of less than 3.0 to 1.0 as of the end of each fiscal quarter 
ending June 30, 2018 and thereafter. We are also required to maintain a debt service coverage ratio (as defined in the 
agreement) of at least 1.5 to 1.0. EBITDA for purposes of the facility excludes the results of certain renewable energy projects 
that we own and for which financing from others remains outstanding.

In addition, our project financing term loans and construction loans require us to comply with a variety of financial and 

operational covenants.

Although we do not consider it likely that we will fail to comply with any material covenants for the next twelve months, 
we cannot assure that we will be able to do so.  Our failure to comply with these covenants may result in the declaration of an 
event of default and cause us to be unable to borrow under our credit facility. In addition to preventing additional borrowings 
under this facility, an event of default, if not cured or waived, may result in the acceleration of the maturity of indebtedness 
outstanding under it or the applicable project financing term loan, which would require us to pay all amounts outstanding. If an 
event of default occurs, we may not be able to cure it within any applicable cure period, if at all. Certain of our debt agreements 
also contain subjective acceleration clauses based on a lender deeming that a “material adverse change” in our business has 
occurred. If these clauses are implicated, and the lender declares that an event of default has occurred, the outstanding 
indebtedness would likely be immediately due and owing. If the maturity of our indebtedness is accelerated, we may not have 
sufficient funds available for repayment or we may not have the ability to borrow or obtain sufficient funds to replace the 
accelerated indebtedness on terms acceptable to us or at all.

10The LIBOR calculation method may change and LIBOR is expected to be phased out after 2021.

Our senior credit facility and certain of our project financing term loans permit or require interest on the outstanding 
principal balance to be calculated based on LIBOR. On July 27, 2017, the U.K. Financial Conduct Authority (the "FCA") 
announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. In the meantime, actions 
by the FCA, other regulators, or law enforcement agencies may result in changes to the method by which LIBOR is calculated. 
At this time, it is not possible to predict the effect of any such changes or any other reforms to LIBOR that may be enacted in 
the U.K. or elsewhere.

The projects we undertake for our customers generally require significant capital, which our customers or we may finance 
through third parties, and such financing may not be available to our customers or to us on favorable terms, if at all.

Our projects for customers are typically financed by third parties. For small-scale renewable energy plants that we own, we 
typically rely on a combination of our working capital and debt to finance construction costs. If we or our customers are unable 
to raise funds on acceptable terms when needed, we may be unable to secure customer contracts, the size of contracts we do 
obtain may be smaller or we could be required to delay the development and construction of projects, reduce the scope of those 
projects or otherwise restrict our operations. Any inability by us or our customers to raise the funds necessary to finance our 
projects could materially harm our business, financial condition and operating results.

Project development or construction activities may not be successful, and we may make significant investments without first 
obtaining project financing, which could increase our costs and impair our ability to recover our investments.

The development and construction of small-scale renewable energy plants and other energy infrastructure projects involve 

numerous risks. We may be required to spend significant sums for preliminary engineering, permitting, legal and other expenses 
before we can determine whether a project is feasible, economically attractive or capable of being built. In addition, we will 
often choose to bear the costs of such efforts prior to obtaining project financing, prior to getting final regulatory approval and 
prior to our final sale to a customer, if any.

Successful completion of a particular project may be adversely affected by numerous factors, including: failures or delays 

in obtaining desired or necessary land rights, including ownership, leases and/or easements; failures or delays in obtaining 
necessary permits, licenses or other governmental support or approvals, or in overcoming objections from members of the 
public or adjoining land owners; uncertainties relating to land costs for projects; unforeseen engineering problems; access to 
available transmission for electricity generated by our small-scale renewable energy plants; construction delays and contractor 
performance shortfalls; work stoppages or labor disruptions and compliance with labor regulations; cost over-runs; availability 
of products and components from suppliers; adverse weather conditions; environmental, archaeological and geological 
conditions; and availability of construction and permanent financing.

If we are unable to complete the development of a small-scale renewable energy plants or fail to meet one or more agreed 

target construction milestone dates, we may be subject to liquidated damages and/or penalties under the Engineering 
Procurement and Construction agreement or other agreements relating to the power plant or project, and we typically will not 
be able to recover our investment in the project. We expect to invest a significant amount of capital to develop projects whether 
owned by us or by third parties. If we are unable to complete the development of a project, we may write-down or write-off 
some or all of these capitalized investments, which would have an adverse impact on our net income in the period in which the 
loss is recognized.

Our business is affected by seasonal trends and construction cycles, and these trends and cycles could have an adverse effect 
on our operating results.

We are subject to seasonal fluctuations and construction cycles, particularly in climates that experience colder weather 
during the winter months, such as the northern United States and Canada, or at educational institutions, where large projects are 
typically carried out during summer months when their facilities are unoccupied. In addition, government customers, many of 
which have fiscal years that do not coincide with ours, typically follow annual procurement cycles and appropriate funds on a 
fiscal-year basis even though contract performance may take more than one year. Further, government contracting cycles can be 
affected by the timing of, and delays in, the legislative process related to government programs and incentives that help drive 
demand for energy efficiency and renewable energy projects. As a result, our revenues and operating income in the third and 
fourth quarter are typically higher, and our revenues and operating income in the first quarter are typically lower, than in other 
quarters of the year. As a result of such fluctuations, we may occasionally experience declines in revenue or earnings as 

11 
compared to the immediately preceding quarter, and comparisons of our operating results on a period-to-period basis may not 
be meaningful.

We may have exposure to additional tax liabilities and our effective tax rate may increase or fluctuate, which could increase 
our income tax expense and reduce our net income.

Our provision for income taxes is subject to volatility and could be adversely affected by changes in tax laws or 

regulations, particularly changes in tax incentives in support of energy efficiency. For example, certain deductions relating to 
energy efficiency have expiration dates which could significantly alter the existing tax code, including the removal of these 
credits prior to their scheduled expiration. The 30% investment tax credit (“ITC”) relating to the installation of solar power was 
extended through 2019, after which it will fall to 26 percent in 2020, 22 percent in 2021, and 10 percent in 2022 and future 
years.  If these or other deductions and credits expire without being extended, or otherwise are reduced or eliminated, our 
effective tax rate would increase, which could increase our income tax expense and reduce our net income.

Our tax rate has historically been significantly impacted by the IRC Section 179D deduction. This deduction is related to 

energy efficient improvements we provide under government contracts. Section 179D was extended through December 31, 
2017 as part of the Bipartisan Budget Act which became law on February 9, 2018. There is no assurance that Section 179D will 
continue to be extended retroactively or otherwise and were the deduction not available it would significantly affect our tax 
rate.    

In addition, like other companies, we may be subject to examination of our income tax returns by the U.S. Internal 
Revenue Service and other tax authorities; our U.S. federal tax returns for 2015 through 2017 are subject to audit by federal, 
state and foreign tax authorities. Though we regularly assess the likelihood of adverse outcomes from such examinations and 
the adequacy of our provision for income taxes, there can be no assurance that such provision is sufficient and that a 
determination by a tax authority will not have an adverse effect on our net income.

Changes in the laws and regulations governing the public procurement of ESPCs could have a material impact on our 
business.

We derive a significant amount of our revenue from ESPCs with our government customers. While federal, state and local 
government rules governing such contracts vary, such rules may, for example, permit the funding of such projects through long-
term financing arrangements; permit long-term payback periods from the savings realized through such contracts; allow units of 
government to exclude debt related to such projects from the calculation of their statutory debt limitation; allow for award of 
contracts on a “best value” instead of “lowest cost” basis; and allow for the use of sole source providers. To the extent these 
rules become more restrictive in the future, our business could be harmed.

Failure of third parties to manufacture quality products or provide reliable services in a timely manner could cause delays 
in the delivery of our services and completion of our projects, which could damage our reputation, have a negative impact 
on our relationships with our customers and adversely affect our growth.

Our success depends on our ability to provide services and complete projects in a timely manner, which in part depends on 
the ability of third parties to provide us with timely and reliable products and services. In providing our services and completing 
our projects, we rely on products that meet our design specifications and components manufactured and supplied by third 
parties, as well as on services performed by subcontractors.We also rely on subcontractors to perform substantially all of the 
construction and installation work related to our projects; and we often need to engage subcontractors with whom we have no 
experience for our projects.

If any of our subcontractors are unable to provide services that meet or exceed our customers’ expectations or satisfy our 

contractual commitments, our reputation, business and operating results could be harmed. In addition, if we are unable to avail 
ourselves of warranty and other contractual protections with providers of products and services, we may incur liability to our 
customers or additional costs related to the affected products and components, which could have a material adverse effect on 
our business, financial condition and operating results. Moreover, any delays, malfunctions, inefficiencies or interruptions in 
these products or services could adversely affect the quality and performance of our solutions and require considerable expense 
to establish alternate sources for such products and services.  This could cause us to experience difficulty retaining current 
customers and attracting new customers, and could harm our brand, reputation and growth.

12We may have liability to our customers under our ESPCs if our projects fail to deliver the energy use reductions to which we 
are committed under the contract.

For our energy efficiency projects, we typically enter into ESPCs under which we commit that the projects will satisfy 

agreed-upon performance standards appropriate to the project.  These commitments are typically structured as guarantees of 
increased energy efficiency that are based on the design, capacity, efficiency or operation of the specific equipment and systems 
we install.  Our commitments generally fall into three categories: pre-agreed, equipment-level and whole building-level. Under 
a pre-agreed efficiency commitment, our customer reviews the project design in advance and agrees that, upon or shortly after 
completion of installation of the specified equipment comprising the project, the pre-agreed increase in energy efficiency will 
have been met. Under an equipment-level commitment, we commit to a level of increased energy efficiency based on the 
difference in use measured first with the existing equipment and then with the replacement equipment upon completion of 
installation. A whole building-level commitment requires future measurement and verification of increased energy efficiency 
for a whole building, often based on readings of the utility meter where usage is measured. Depending on the project, the 
measurement and verification may be required only once, upon installation, based on an analysis of one or more sample 
installations, or may be required to be repeated at agreed upon intervals generally over periods of up to 23 years.

Under our contracts, we typically do not take responsibility for a wide variety of factors outside our control and exclude or 
adjust for such factors in commitment calculations. These factors include variations in energy prices and utility rates, weather, 
facility occupancy schedules, the amount of energy-using equipment in a facility, and failure of the customer to operate or 
maintain the project properly.  We rely in part on warranties from our equipment suppliers and subcontractors to back-stop the 
warranties we provide to our customers and, where appropriate, pass on the warranties to our customers. However, the 
warranties we provide to our customers are sometimes broader in scope or longer in duration than the corresponding warranties 
we receive from our suppliers and subcontractors, and we bear the risk for any differences, as well as the risk of warranty 
default by our suppliers and subcontractors.

Typically, our performance commitments apply to the aggregate overall performance of a project rather than to individual 
energy efficiency measures. Therefore, to the extent an individual measure underperforms, it may be offset by other measures 
that overperform during the same period. In the event that an energy efficiency project does not perform according to the 
agreed-upon specifications, our agreements typically allow us to satisfy our obligation by adjusting or modifying the installed 
equipment, installing additional measures to provide substitute energy savings, or paying the customer for lost energy savings 
based on the assumed conditions specified in the agreement. However, we may incur additional or increased liabilities or 
expenses under our ESPCs in the future.  Such liabilities or expenses could be substantial, and they could materially harm our 
business, financial condition or operating results. In addition, any disputes with a customer over the extent to which we bear 
responsibility to improve performance or make payments to the customer may diminish our prospects for future business from 
that customer or damage our reputation in the marketplace.

We may assume responsibility under customer contracts for factors outside our control, including, in connection with some 
customer projects, the risk that fuel prices will increase.

We typically do not take responsibility under our contracts for a wide variety of factors outside our control. We have, 
however, in a limited number of contracts assumed some level of risk and responsibility for certain factors — sometimes only 
to the extent that variations exceed specified thresholds — and may also do so under certain contracts in the future, particularly 
in our contracts for renewable energy projects. For example, under a contract for the construction and operation of a 
cogeneration facility at the U.S. Department of Energy Savannah River Site in South Carolina, a subsidiary of ours is exposed 
to the risk that the price of the biomass that will be used to fuel the cogeneration facility may rise during the 19-year 
performance period of the contract. Several provisions in that contract mitigate the price risk. In addition, although we typically 
structure our contracts so that our obligation to supply a customer with LFG, electricity or steam, for example, does not exceed 
the quantity produced by the production facility, in some circumstances we may commit to supply a customer with specified 
minimum quantities based on our projections of the facility’s production capacity. In such circumstances, if we are unable to 
meet such commitments, we may be required to incur additional costs or face penalties. Despite the steps we have taken to 
mitigate risks under these and other contracts, such steps may not be sufficient to avoid the need to incur increased costs to 
satisfy our commitments, and such costs could be material. Increased costs that we are unable to pass through to our customers 
could have a material adverse effect on our operating results.

13Our business depends on experienced and skilled personnel and substantial specialty subcontractor resources, and if we lose 
key personnel or if we are unable to attract and integrate additional skilled personnel, it will be more difficult for us to 
manage our business and complete projects.

The success of our business and construction projects depend in large part on the skill of our personnel and on trade labor 
resources, including with certain specialty subcontractor skills. Competition for personnel, particularly those with expertise in 
the energy services and renewable energy industries, is high. In the event we are unable to attract, hire and retain the requisite 
personnel and subcontractors, we may experience delays in completing projects in accordance with project schedules and 
budgets. Further, any increase in demand for personnel and specialty subcontractors may result in higher costs, causing us to 
exceed the budget on a project. Either of these circumstances may have an adverse effect on our business, financial condition 
and operating results, harm our reputation among and relationships with our customers and cause us to curtail our pursuit of 
new projects.

Our future success is particularly dependent on the vision, skills, experience and effort of our senior management team, 

including our executive officers and our founder, principal stockholder, president and chief executive officer, George P. 
Sakellaris. If we were to lose the services of any of our executive officers or key employees, our ability to effectively manage 
our operations and implement our strategy could be harmed and our business may suffer.

If we cannot obtain surety bonds and letters of credit, our ability to operate may be restricted.

Federal and state laws require us to secure the performance of certain long-term obligations through surety bonds and 

letters of credit.  In addition, we are occasionally required to provide bid bonds or performance bonds to secure our 
performance under energy efficiency contracts. In the future, we may have difficulty procuring or maintaining surety bonds or 
letters of credit, and obtaining them may become more expensive, require us to post cash collateral or otherwise involve 
unfavorable terms. Because we are sometimes required to have performance bonds or letters of credit in place before projects 
can commence or continue, our failure to obtain or maintain those bonds and letters of credit would adversely affect our ability 
to begin and complete projects, and thus could have a material adverse effect on our business, financial condition and operating 
results.

We operate in a highly competitive industry, and our current or future competitors may be able to compete more effectively 
than we do, which could have a material adverse effect on our business, revenues, growth rates and market share.

Our industry is highly competitive, with many companies of varying size and business models, many of which have their 

own proprietary technologies, competing for the same business as we do. Many of our competitors have longer operating 
histories and greater resources than us, and could focus their substantial financial resources to develop a competitive advantage.  
Our competitors may also offer energy solutions at prices below cost, devote significant sales forces to competing with us or 
attempt to recruit our key personnel by increasing compensation, any of which could improve their competitive positions.  Any 
of these competitive factors could make it more difficult for us to attract and retain customers, cause us to lower our prices in 
order to compete, and reduce our market share and revenues, any of which could have a material adverse effect on our financial 
condition and operating results. We can provide no assurance that we will continue to effectively compete against our current 
competitors or additional companies that may enter our markets.

In addition, we may also face competition based on technological developments that reduce demand for electricity, increase 

power supplies through existing infrastructure or that otherwise compete with our products and services. We also encounter 
competition in the form of potential customers electing to develop solutions or perform services internally rather than engaging 
an outside provider such as us.

We may be unable to complete or operate our projects on a profitable basis or as we have committed to our customers.

Development, installation and construction of our energy efficiency and renewable energy projects, and operation of our 

renewable energy projects, entails many risks, including:

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failure to receive critical components and equipment that meet our design specifications and can be delivered on
schedule;

failure to obtain all necessary rights to land access and use;

failure to receive quality and timely performance of third-party services;

increases in the cost of labor, equipment and commodities needed to construct or operate projects;

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permitting and other regulatory issues, license revocation and changes in legal requirements;

shortages of equipment or skilled labor;

unforeseen engineering problems;

failure of a customer to accept or pay for renewable energy that we supply;

weather interferences, catastrophic events including fires, explosions, earthquakes, droughts and acts of terrorism; and
accidents involving personal injury or the loss of life;

labor disputes and work stoppages;

• mishandling of hazardous substances and waste; and

•

other events outside of our control.

Any of these factors could give rise to construction delays and construction and other costs in excess of our expectations.
This could prevent us from completing construction of our projects, cause defaults under our financing agreements or under 
contracts that require completion of project construction by a certain time, cause projects to be unprofitable for us, or otherwise 
impair our business, financial condition and operating results.

Our small-scale renewable energy plants may not generate expected levels of output.

The small-scale renewable energy plants that we construct and own are subject to various operating risks that may cause 
them to generate less than expected amounts of processed LFG, electricity or thermal energy. These risks include a failure or 
degradation of our, our customers’ or utilities’ equipment; an inability to find suitable replacement equipment or parts; less than 
expected supply of the plant’s source of renewable energy, such as LFG or biomass; or a faster than expected diminishment of 
such supply. Any extended interruption in the plant’s operation, or failure of the plant for any reason to generate the expected 
amount of output, could have a material adverse effect on our business and operating results. In addition, we have in the past, 
and could in the future, incur material asset impairment charges if any of our renewable energy plants incurs operational issues 
that indicate that our expected future cash flows from the plant are less than its carrying value.  Any such impairment charge 
could have a material adverse effect on our operating results in the period in which the charge is recorded.

We have not entered into long-term offtake agreements for a portion of the output from our small-scale renewable energy 
plants.

We have not entered into long-term offtake agreements for a portion of the output from our small-scale renewable energy 

plants, particularly LFG plants, and we are required to sell the processed LFG or electricity produced by the facility at 
wholesale prices, which are exposed to market fluctuations and risks.  The failure to sell such processed LFG or electricity at a 
favorable price could have a material adverse effect on our business and operating results.

We may not be able to replace expiring offtake agreements with contracts on similar terms. If we are unable to replace an 
expired offtake agreement with an acceptable new contract, we may be required to remove the small-scale renewable energy 
plant from the site or, alternatively, we may sell the assets to the customer.

We may not be able to replace an expiring offtake agreement with a contract on equivalent terms and conditions, including 

at prices that permit operation of the related facility on a profitable basis. If we are unable to replace an expiring offtake 
agreement with an acceptable new revenue contract, the affected site may temporarily or permanently cease operations or we 
may be required to sell the power produced by the facility at wholesale prices which are exposed to market fluctuations and 
risks. In the case of a solar photovoltaic installation that ceases operations, the offtake agreement terms generally require that 
we remove the assets, including fixing or reimbursing the site owner for any damages caused by the assets or the removal of 
such assets. Alternatively, we may agree to sell the assets to the site owner, but the terms and conditions, including price, that 
we would receive in any sale, and the sale price may not be sufficient to replace the revenue previously generated by the small-
scale renewable energy plant.

15We plan to expand our business in part through future acquisitions, but we may not be able to identify or complete suitable 
acquisitions.

Historically, acquisitions have been a significant part of our growth strategy. We plan to continue to use acquisitions of 

companies or assets to expand our project skill-sets and capabilities, expand our geographic markets, add experienced 
management, increase our product and service offerings and add to our energy producing asset portfolio. However, we may be 
unable to implement this growth strategy if we cannot identify suitable acquisition candidates, reach agreement with acquisition 
targets on acceptable terms or arrange required financing for acquisitions on acceptable terms. In addition, the time and effort 
involved in attempting to identify acquisition candidates and consummate acquisitions may divert the attention and efforts of 
members of our management from the operations of our company.

Any future acquisitions that we may make could disrupt our business, cause dilution to our stockholders and harm our 
business, financial condition or operating results.

If we are successful in consummating acquisitions, those acquisitions could subject us to a number of risks, including:

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•

the purchase price we pay could significantly deplete our cash reserves or result in dilution to our existing
stockholders;

we may find that the acquired company or assets do not improve our customer offerings or market position as planned;

we may have difficulty integrating the operations and personnel of the acquired company;

key personnel and customers of the acquired company may terminate their relationships with the acquired company as
a result of the acquisition;

we may experience additional financial and accounting challenges and complexities in areas such as tax planning and
financial reporting;

we may incur additional costs and expenses related to complying with additional laws, rules or regulations in new
jurisdictions;

we may assume or be held liable for risks and liabilities (including for environmental-related costs) as a result of our
acquisitions, some of which we may not discover during our due diligence or adequately adjust for in our acquisition
arrangements;

our ongoing business and management’s attention may be disrupted or diverted by transition or integration issues and
the complexity of managing geographically or culturally diverse enterprises;

we may incur one-time write-offs or restructuring charges in connection with the acquisition;

we may acquire goodwill and other intangible assets that are subject to amortization or impairment tests, which could
result in future charges to earnings; and

we may not be able to realize the cost savings or other financial benefits we anticipated.

These factors could have a material adverse effect on our business, financial condition and operating results.

We may be required to write-off or impair capitalized costs or intangible assets in the future or we may incur restructuring 
costs or other charges, each of which could harm our earnings. 

In accordance with generally accepted accounting principles in the United States, we capitalize certain expenditures and 
advances relating to our acquisitions, pending acquisitions, project development costs, interest costs related to project financing 
and certain energy assets. In addition, we have considerable unamortized assets. From time to time in future periods, we may be 
required to incur a charge against earnings in an amount equal to any unamortized capitalized expenditures and advances, net of 
any portion thereof that we estimate will be recoverable, through sale or otherwise, relating to: (i) any operation or other asset 
that is being sold, permanently shut down, impaired or has not generated or is not expected to generate sufficient cash flow; 
(ii) any pending acquisition that is not consummated; (iii) any project that is not expected to be successfully completed; and
(iv) any goodwill or other intangible assets that are determined to be impaired.

In response to such charges and costs and other market factors, we may be required to implement restructuring plans in an 
effort to reduce the size and cost of our operations and to better match our resources with our market opportunities. As a result 

16of such actions, we would expect to incur restructuring expenses and accounting charges which may be material. Several factors 
could cause a restructuring to adversely affect our business, financial condition and results of operations. These include 
potential disruption of our operations, the development of our small-scale renewable energy projects and other aspects of our 
business. Employee morale and productivity could also suffer and result in unintended employee attrition. Any restructuring 
would require substantial management time and attention and may divert management from other important work. Moreover, 
we could encounter delays in executing any restructuring plans, which could cause further disruption and additional 
unanticipated expense.

See also Note 2, “Summary of Significant Accounting Policies” and Note 5, “Goodwill and Intangible Assets”, to our 

Consolidated Financial Statements appearing in Item 8 of this Annual Report on Form 10-K.

We need governmental approvals and permits, and we typically must meet specified qualifications, in order to undertake our 
energy efficiency projects and construct, own and operate our small-scale renewable energy projects, and any failure to do 
so would harm our business.

The design, construction and operation of our energy efficiency and small-scale renewable energy projects require various 

governmental approvals and permits, and may be subject to the imposition of related conditions that vary by jurisdiction. In 
some cases, these approvals and permits require periodic renewal. We cannot predict whether all permits required for a given 
project will be granted or whether the conditions associated with the permits will be achievable. The denial of a permit essential 
to a project or the imposition of impractical conditions would impair our ability to develop the project. In addition, we cannot 
predict whether the permits will attract significant opposition or whether the permitting process will be lengthened due to 
complexities and appeals. Delay in the review and permitting process for a project can impair or delay our ability to develop 
that project or increase the cost so substantially that the project is no longer attractive to us. We have experienced delays in 
developing our projects due to delays in obtaining permits and may experience delays in the future. If we were to commence 
construction in anticipation of obtaining the final, non-appealable permits needed for that project, we would be subject to the 
risk of being unable to complete the project if all the permits were not obtained. If this were to occur, we would likely lose a 
significant portion of our investment in the project and could incur a loss as a result. Further, the continued operations of our 
projects require continuous compliance with permit conditions. This compliance may require capital improvements or result in 
reduced operations. Any failure to procure, maintain and comply with necessary permits would adversely affect ongoing 
development, construction and continuing operation of our projects.

In addition, the projects we perform for governmental agencies are governed by particular qualification and contracting 
regimes. Certain states require qualification with an appropriate state agency as a precondition to performing work or appearing 
as a qualified energy service provider for state, county and local agencies within the state. For example, the Commonwealth of 
Massachusetts and the states of Colorado and Washington pre-qualify energy service providers and provide contract documents 
that serve as the starting point for negotiations with potential governmental clients. Most of the work that we perform for the 
federal government is performed under IDIQ agreements between a government agency and us or a subsidiary. These IDIQ 
agreements allow us to contract with the relevant agencies to implement energy projects, but no work may be performed unless 
we and the agency agree on a task order or delivery order governing the provision of a specific project. The government 
agencies enter into contracts for specific projects on a competitive basis. We and our subsidiaries and affiliates are currently 
party to two IDIQ agreements with the U.S. Department of Energy expiring in 2019 and in 2022, respectively. We are also party 
to similar agreements with other federal agencies, including the U.S. Army Corps of Engineers and the U.S. General Services 
Administration. If we are unable to maintain or renew our IDIQ qualification under the U.S. Department of Energy program for 
ESPCs, or similar federal or state qualification regimes, our business could be materially harmed.  We are also party to similar 
agreements with other federal agencies, including the U.S. Army Corps of Engineers and the U.S. General Services 
Administration.

If we are unable to maintain or renew our IDIQ qualification under the U.S. Department of Energy program for ESPCs, or 

similar federal or state qualification regimes, our business could be materially harmed.

Many of our small-scale renewable energy projects are, and other future projects may be, subject to or affected by U.S. 
federal energy regulation or other regulations that govern the operation, ownership and sale of the facility, or the sale of 
electricity from the facility.

PUHCA and the FPA regulate public utility holding companies and their subsidiaries and place constraints on the conduct 
of their business. The FPA regulates wholesale sales of electricity and the transmission of electricity in interstate commerce by 
public utilities. Under PURPA, all of our current small-scale renewable energy projects are small power “qualifying 

17facilities” (facilities meeting statutory size, fuel and filing requirements) that are exempt from regulations under PUHCA, most 
provisions of the FPA and state rate and financial regulation. None of our renewable energy projects are currently subject to rate 
regulation for wholesale power sales by the Federal Energy Regulatory Commission (“FERC”) under the FPA, but certain of 
our projects that are under construction or development could become subject to such regulation in the future.  Also, we may 
acquire interests in or develop generating projects that are not qualifying facilities. Non-qualifying facility projects would be 
fully subject to FERC corporate and rate regulation, and would be required to obtain FERC acceptance of their rate schedules 
for wholesale sales of energy, capacity and ancillary services, which requires substantial disclosures to and discretionary 
approvals from FERC. FERC may revoke or revise an entity’s authorization to make wholesale sales at negotiated, or market-
based, rates if FERC determines that we can exercise market power in transmission or generation, create barriers to entry or 
engage in abusive affiliate transactions or market manipulation. In addition, many public utilities (including any non-qualifying 
facility generator in which we may invest) are subject to FERC reporting requirements that impose administrative burdens and 
that, if violated, can expose the company to civil penalties or other risks.

All of our wholesale electric power sales are subject to certain market behavior rules. These rules change from time to 
time, by virtue of FERC rulemaking proceedings and FERC-ordered amendments to utilities’ or power pools’ FERC tariffs. If 
we are deemed to have violated these rules, we will be subject to potential disgorgement of profits associated with the violation 
and/or suspension or revocation of our market-based rate authority, as well as potential criminal and civil penalties. If we were 
to lose market-based rate authority for any non-qualifying facility project we may acquire or develop in the future, we would be 
required to obtain FERC’s acceptance of a cost-based rate schedule and could become subject to, among other things, the 
burdensome accounting, record keeping and reporting requirements that are imposed on public utilities with cost-based rate 
schedules. This could have an adverse effect on the rates we charge for power from our projects and our cost of regulatory 
compliance.

Wholesale electric power sales are subject to increasing regulation. The terms and conditions for power sales, and the right 

to enter and remain in the wholesale electric sector, are subject to FERC oversight. Due to major regulatory restructuring 
initiatives at the federal and state levels, the U.S. electric industry has undergone substantial changes over the past decade. We 
cannot predict the future design of wholesale power markets or the ultimate effect ongoing regulatory changes will have on our 
business. Other proposals to further regulate the sector may be made and legislative or other attention to the electric power 
market restructuring process may delay or reverse the movement towards competitive markets.

If we become subject to additional regulation under PUHCA, FPA or other regulatory frameworks, if existing regulatory 

requirements become more onerous, or if other material changes to the regulation of the electric power markets take place, our 
business, financial condition and operating results could be adversely affected.

Compliance with environmental laws could adversely affect our operating results.

Costs of compliance with federal, state, provincial, local and other foreign existing and future environmental regulations 

could adversely affect our cash flow and profitability. We are required to comply with numerous environmental laws and 
regulations and to obtain numerous governmental permits in connection with energy efficiency and renewable energy projects, 
and we may incur significant additional costs to comply with these requirements. If we fail to comply with these requirements, 
we could be subject to civil or criminal liability, damages and fines. Existing environmental regulations could be revised or 
reinterpreted and new laws and regulations could be adopted or become applicable to us or our projects, and future changes in 
environmental laws and regulations could occur. These factors may materially increase the amount we must invest to bring our 
projects into compliance and impose additional expense on our operations.

In addition, private lawsuits or enforcement actions by federal, state, provincial and/or foreign regulatory agencies may 

materially increase our costs. Certain environmental laws make us potentially liable on a joint and several basis for the 
remediation of contamination at or emanating from properties or facilities we currently or formerly owned or operated or 
properties to which we arranged for the disposal of hazardous substances. Such liability is not limited to the cleanup of 
contamination we actually caused. Although we seek to obtain indemnities against liabilities relating to historical contamination 
at the facilities we own or operate, we cannot provide any assurance that we will not incur liability relating to the remediation 
of contamination, including contamination we did not cause.

We may not be able to obtain or maintain, from time to time, all required environmental regulatory approvals. A delay in 
obtaining any required environmental regulatory approvals or failure to obtain and comply with them could adversely affect our 
business and operating results.

18International expansion is one of our growth strategies, and international operations will expose us to additional risks that 
we do not face in the United States, which could have an adverse effect on our operating results.

We generate a portion of our revenues from operations in Canada and the U.K., and although we are engaged in overseas 
projects for the U.S. Department of Defense, we currently derive a small amount of revenues from outside of North America. 
However, international expansion is one of our growth strategies, and we expect our revenues and operations outside of North 
America will expand in the future. These operations will be subject to a variety of risks that we do not face in the United States, 
and that we may face only to a limited degree in Canada and the United Kingdom, including:

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building and managing highly experienced foreign workforces and overseeing and ensuring the performance of foreign
subcontractors;

increased travel, infrastructure and legal and compliance costs associated with multiple international locations;

additional withholding taxes or other taxes on our foreign income, and tariffs or other restrictions on foreign trade or
investment;

imposition of, or unexpected adverse changes in, foreign laws or regulatory requirements, many of which differ from
those in the United States;

increased exposure to foreign currency exchange rate risk;

longer payment cycles for sales in some foreign countries and potential difficulties in enforcing contracts and
collecting accounts receivable;

difficulties in repatriating overseas earnings;

general economic conditions in the countries in which we operate; and

political unrest, war, incidents of terrorism, or responses to such events.

We also continue to evaluate the potential effect of the United Kingdom’s planned departure from the European Union
(EU) (commonly referred to as Brexit) on our business operations and financial results, including the impacts if the United 
Kingdom fails to reach an agreement with the EU on Brexit by the March 29, 2019 deadline. Brexit could adversely affect 
European or worldwide political, regulatory, economic or market conditions and could contribute to instability in global 
political institutions, regulatory agencies and financial markets.

Our overall success in international markets will depend, in part, on our ability to succeed in differing legal, regulatory, 
economic, social and political conditions. We may not be successful in developing and implementing policies and strategies that 
will be effective in managing these risks in each country where we do business. Our failure to manage these risks successfully 
could harm our international operations, reduce our international sales and increase our costs, thus adversely affecting our 
business, financial condition and operating results.

Changes in utility regulation and tariffs could adversely affect our business.

Our business is affected by regulations and tariffs that govern the activities and rates of utilities. For example, utility 
companies are commonly allowed by regulatory authorities to charge fees to some business customers for disconnecting from 
the electric grid or for having the capacity to use power from the electric grid for back-up purposes. These fees could increase 
the cost to our customers of taking advantage of our services and make them less desirable, thereby harming our business, 
financial condition and operating results. Our current generating projects are all operated as qualifying facilities. FERC 
regulations under the FPA confer upon these facilities key rights to interconnection with local utilities, and can entitle 
qualifying facilities to enter into power purchase agreements with local utilities, from which the qualifying facilities benefit. 
Changes to these federal laws and regulations could increase our regulatory burdens and costs, and could reduce our revenues.  
State regulatory agencies could award renewable energy certificates or credits that our electric generation facilities produce to 
our power purchasers, thereby reducing the power sales revenues we otherwise would earn. In addition, modifications to the 
pricing policies of utilities could require renewable energy systems to charge lower prices in order to compete with the price of 
electricity from the electric grid and may reduce the economic attractiveness of certain energy efficiency measures.

Some of the demand-reduction services we provide for utilities and institutional clients are subject to regulatory tariffs 
imposed under federal and state utility laws. In addition, the operation of, and electrical interconnection for, our renewable 
energy projects are subject to federal, state or provincial interconnection and federal reliability standards that are also set forth 
in utility tariffs. These tariffs specify rules, business practices and economic terms to which we are subject. The tariffs are 

19drafted by the utilities and approved by the utilities’ state and federal regulatory commissions. These tariffs change frequently 
and it is possible that future changes will increase our administrative burden or adversely affect the terms and conditions under 
which we render service to our customers.

Our activities and operations are subject to numerous health and safety laws and regulations, and if we violate such 
regulations, we could face penalties and fines.

We are subject to numerous health and safety laws and regulations in each of the jurisdictions in which we operate. These 

laws and regulations require us to obtain and maintain permits and approvals and implement health and safety programs and 
procedures to control risks associated with our projects. Compliance with those laws and regulations can require us to incur 
substantial costs. Moreover, if our compliance programs are not successful, we could be subject to penalties or to revocation of 
our permits, which may require us to curtail or cease operations of the affected projects. Violations of laws, regulations and 
permit requirements may also result in criminal sanctions or injunctions.

Health and safety laws, regulations and permit requirements may change or become more stringent. Any such changes 
could require us to incur materially higher costs than we currently have. Our costs of complying with current and future health 
and safety laws, regulations and permit requirements, and any liabilities, fines or other sanctions resulting from violations of 
them, could adversely affect our business, financial condition and operating results.

We are subject to various privacy and consumer protection laws.

Our privacy policy is posted on our website, and any failure by us or our vendor or other business partners to comply with 

it or with federal, state or international privacy, data protection or security laws or regulations could result in regulatory or 
litigation-related actions against us, legal liability, fines, damages and other costs. We may also incur substantial expenses and 
costs in connection with maintaining compliance with such laws. For example, commencing in May 2018, the General Data 
Protection Regulation (the “GDPR”) became fully effective with respect to the processing of personal information collected 
from individuals located in the European Union. The GDPR created new compliance obligations and significantly increases 
fines for noncompliance. Although we take steps to protect the security of our customers’ personal information, we may be 
required to expend significant resources to comply with data breach requirements if third parties improperly obtain and use the 
personal information of our customers or we otherwise experience a data loss with respect to customers’ personal information. 
A major breach of our network security and systems could have negative consequences for our business and future prospects, 
including possible fines, penalties and damages, reduced customer demand for our vehicles, and harm to our reputation and 
brand.

If our subsidiaries default on their obligations under their debt instruments, we may need to make payments to lenders to 
prevent foreclosure on the collateral securing the debt.

We typically set up subsidiaries to own and finance our renewable energy projects. These subsidiaries incur various types 
of debt which can be used to finance one or more projects. This debt is typically structured as non-recourse debt, which means 
it is repayable solely from the revenues from the projects financed by the debt and is secured by such projects’ physical assets, 
major contracts and cash accounts and a pledge of our equity interests in the subsidiaries involved in the projects. Although our 
subsidiary debt is typically non-recourse to Ameresco, if a subsidiary of ours defaults on such obligations, or if one project out 
of several financed by a particular subsidiary’s indebtedness encounters difficulties or is terminated, then we may from time to 
time determine to provide financial support to the subsidiary in order to maintain rights to the project or otherwise avoid the 
adverse consequences of a default. In the event a subsidiary defaults on its indebtedness, its creditors may foreclose on the 
collateral securing the indebtedness, which may result in our losing our ownership interest in some or all of the subsidiary’s 
assets. The loss of our ownership interest in a subsidiary or some or all of a subsidiary’s assets could have a material adverse 
effect on our business, financial condition and operating results.

We are exposed to the credit risk of some of our customers.

Most of our revenues are derived under multi-year or long-term contracts with our customers, and our revenues are 
therefore dependent to a large extent on the creditworthiness of our customers. During periods of economic downturn, our 
exposure to credit risks from our customers increases, and our efforts to monitor and mitigate the associated risks may not be 
effective in reducing our credit risks. In the event of non-payment by one or more of our customers, our business, financial 
condition and operating results could be adversely affected.

20Fluctuations in foreign currency exchange rates can impact our results.

A portion of our total revenues are generated by our Canadian and U.K. subsidiaries. Changes in exchange rates between 

the Canadian dollar and the U.S. dollar, as well as the British pound sterling and the U.S. dollar, may adversely affect our 
operating results.

A failure of our information technology (“IT”) and data security infrastructure could adversely impact our business and 
operations.

We rely upon the capacity, reliability and security of our IT and data security infrastructure and our ability to expand and 
continually update this infrastructure in response to the changing needs of our business. As we implement new systems, they 
may not perform as expected. We also face the challenge of supporting our older systems and implementing necessary 
upgrades. If we experience a problem with the functioning of an important IT system or a security breach of our IT systems, 
including during system upgrades and/or new system implementations, the resulting disruptions could have an adverse effect on 
our business.

We and certain of our third-party vendors receive and store personal information in connection with our human resources 

operations and other aspects of our business. Despite our implementation of security measures, our IT systems, like those of 
other companies, are vulnerable to damages from computer viruses, natural disasters, unauthorized access, cyber attack and 
other similar disruptions, and we have experienced such incidents in the past. Any system failure, accident or security breach 
could result in disruptions to our operations. A material network breach in the security of our IT systems could include the theft 
of our intellectual property, trade secrets, customer information, human resources information or other confidential matter.  
Although past incidents have not had a material impact on our business operations or financial performance, to the extent that 
any disruptions or security breach results in a loss or damage to our data, or an inappropriate disclosure of confidential, 
proprietary or customer information, it could cause significant damage to our reputation, affect our relationships with our 
customers, lead to claims against the Company and ultimately harm our business. In addition, we may be required to incur 
significant costs to protect against damage caused by these disruptions or security breaches in the future. See the discussion of 
GDPR  in the above risk factor “We are subject to various privacy and consumer protection laws” for an example of new 
regulations impacting IT risk.

Risks Related to Ownership of Our Class A Common Stock

The trading price of our Class A common stock is volatile.

The trading price of our Class A common stock is volatile and could be subject to wide fluctuations. In addition, if the 
stock market in general experiences a significant decline, the trading price of our Class A common stock could decline for 
reasons unrelated to our business, financial condition or operating results.  Some companies that have had volatile market prices 
for their securities have had securities class actions filed against them. If a suit were filed against us, regardless of its merits or 
outcome, it would likely result in substantial costs and divert management’s attention and resources. This could have a material 
adverse effect on our business, operating results and financial condition.

Holders of our Class A common stock are entitled to one vote per share, and holders of our Class B common stock are 
entitled to five votes per share. The lower voting power of our Class A common stock may negatively affect the attractiveness 
of our Class A common stock to investors and, as a result, its market value.

We have two classes of common stock: Class A common stock, which is listed on the NYSE and which is entitled to one 

vote per share, and Class B common stock, which is not listed on the any security exchange and is entitled to five votes per 
share. The difference in the voting power of our Class A and Class B common stock could diminish the market value of our 
Class A common stock because of the superior voting rights of our Class B common stock and the power those rights confer.

For the foreseeable future, Mr. Sakellaris or his affiliates will be able to control the selection of all members of our board of 
directors, as well as virtually every other matter that requires stockholder approval, which will severely limit the ability of 
other stockholders to influence corporate matters.

Except in certain limited circumstances required by applicable law, holders of Class A and Class B common stock vote 

together as a single class on all matters to be voted on by our stockholders. Mr. Sakellaris, our founder, principal stockholder, 
president and chief executive officer, owns all of our Class B common stock, which, together with his Class A common stock, 
represents approximately 80% of the combined voting power of our outstanding Class A and Class B common stock.  Under our 
restated certificate of incorporation, holders of shares of Class B common stock may generally transfer those shares to family 

21members, including spouses and descendants or the spouses of such descendants, as well as to affiliated entities, without having 
the shares automatically convert into shares of Class A common stock.  Therefore, Mr. Sakellaris, his affiliates, and his family 
members and descendants will, for the foreseeable future, be able to control the outcome of the voting on virtually all matters 
requiring stockholder approval, including the election of directors and significant corporate transactions such as an acquisition 
of our company, even if they come to own, in the aggregate, as little as 20% of the economic interest of the outstanding shares 
of our Class A and Class B common stock.  Moreover, these persons may take actions in their own interests that you or our 
other stockholders do not view as beneficial.

Though we may repurchase shares of our Class A common stock pursuant to our recently announced share repurchase 
program, we are not obligated to do so and if we do, we may purchase only a limited number of shares of Class A common 
stock. 

On May 5, 2016, we announced a stock repurchase program under which the Company is currently authorized to 

repurchase, in the aggregate, up to $15.0 million of our outstanding Class A common stock. However, we are not obligated to 
acquire any shares of our Class A common stock, and holders of our Class A common stock should not rely on the share 
repurchase program to increase their liquidity. The amount and timing of any share repurchases will depend upon a variety of 
factors, including the trading price of our Class A common stock, liquidity, securities laws restrictions, other regulatory 
restrictions, potential alternative uses of capital, and market and economic conditions. We intend to purchase through open 
market transactions or in privately negotiated transactions, in accordance with applicable securities laws and regulatory 
limitations. We may reduce or eliminate our share repurchase program in the future. The reduction or elimination of our share 
repurchase program, particularly if we do not repurchase the full number of shares authorized under the program, could 
adversely affect the market price of our common stock.

22Item 1B.  Unresolved Staff Comments

None.

Item 2.  Properties

Our corporate headquarters is located in Framingham, Massachusetts, where we occupy approximately 26,000 square feet 
under a lease expiring on June 30, 2025. We occupy nine regional offices in Phoenix, Arizona; Islandia, New York; Oak Brook, 
Illinois; Columbia, Maryland; Charlotte, North Carolina; Knoxville, Tennessee; Tomball, Texas; Spokane, Washington and 
Richmond Hill, Ontario, each less than 25,000 square feet, under lease or sublease agreements. In addition, we lease space, 
typically less space, for 74 field offices throughout North America and the U.K. We also own 87 small-scale renewable energy 
plants throughout North America, which are located on leased sites or sites provided by customers. We expect to add new 
facilities and expand existing facilities as we continue to add employees and expand our business into new geographic areas.

Item 3.  Legal Proceedings

In the ordinary conduct of our business we are subject to periodic lawsuits, investigations and claims. Although we cannot 
predict with certainty the ultimate resolution of such lawsuits, investigations and claims against us, we do not believe that any 
currently pending or threatened legal proceedings to which we are a party will have a material adverse effect on our business, 
results of operations or financial condition.

For additional information about certain proceedings, please refer to Note 14, “Commitments and Contingencies”, to our 

Consolidated Financial Statements included in this report, which is incorporated into this item by reference.

Item 4.  Mine Safety Disclosures

Not applicable.

PART II

Item 5.   Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Securities

Our Class A common stock trades on the New York Stock Exchange under the symbol “AMRC”. 

As of March 7, 2019, and according to the records of our transfer agent, there were 12 shareholders of record of our Class 

A common stock. A substantially greater number of holders of our Class A common stock are “street name” or beneficial 
holders, whose shares are held of record by banks, brokers, and other financial institutions.

Our Class B common stock is not publicly traded and is held of record by George P. Sakellaris, our founder, principal 
stockholder, president and chief executive officer, as well as the Ameresco 2015 Annuity Trust and the Ameresco 2017 Annuity 
Trust, each of which Mr. Sakellaris is trustee and the sole beneficiary. 

Dividend Policy

We have never declared or paid any cash dividends on our capital stock. We currently intend to retain earnings, if any, to 
finance the growth and development of our business and do not expect to pay any cash dividends for the foreseeable future. Our 
revolving senior secured credit facility contains provisions that limit our ability to declare and pay cash dividends during the 
term of that agreement. Payment of future dividends, if any, will be at the discretion of our board of directors and will depend 
on our financial condition, results of operations, capital requirements, restrictions contained in current or future financing 
instruments, provisions of applicable law and other factors our board of directors deems relevant. 

Stock Performance Graph

The following performance graph and related information shall not be deemed “soliciting material” or to be “filed” with the 
SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 (the 
“Securities Act”) or the Exchange Act, except to the extent that we specifically incorporate it by reference into such filing.

The following graph compares the cumulative total return attained by shareholders on our Class A common stock relative 
to the cumulative total returns of the Russell 2000 index and the NASDAQ Clean Edge Green Energy index.  An investment of 

23$100 (with reinvestment of all dividends) is assumed to have been made in our Class A common stock on December 31, 2013, 
and in each of the indexes on December 31, 2013 and its relative performance is tracked through December 31, 2018.

COMPARISON OF FIVE-YEAR CUMULATIVE TOTAL RETURN*
Among Ameresco, Inc., the Russell 2000 Index
and the NASDAQ Clean Edge Green Energy Index

*$100 invested on December 31, 2013 in our Class A common stock or December 31, 2012 in respective index, including 
reinvestment of dividends.  Fiscal year ending December 31, 2018.

Ameresco, Inc.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Russell 2000 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NASDAQ Clean Edge Green Energy Index . . . . . . . . . . .

12/31/2013
$100.00
$100.00
$100.00

12/31/2014
$72.46
$104.89
$107.02

12/31/2015
$64.70
$100.26
$114.81

12/31/2016
$56.94
$121.63
$113.17

12/31/2017
$89.03
$139.44
$155.32

12/31/2018
$145.96
$124.09
$140.36

Shareholder returns over the indicated period should not be considered indicative of future shareholder returns.

24Issuer Purchases of Equity Securities 

The following table provides information as of and for the quarter ended December 31, 2018 regarding shares of our Class 
A common stock that were repurchased under our stock repurchase program authorized by the Board of Directors on April 27, 
2016 (the “Repurchase Program”):

Period

Total Number of
Shares Purchased

Average Price Paid
per Share

Total Number of
Shares Purchased as
Part of Publicly
Announced Plans or
Programs

Approximate
Dollar Value of
Shares that May
Yet Be Purchased
Under the Plans
or Programs

October 1, 2018 - October 31, 2018 . . . .

5,543

$

11.97

5,543

$

3,447,027

November 1, 2018 - November 30, 2018

December 1, 2018 - December 31, 2018.

—

—

—

—

—

—

—

—

Total

5,543

$

11.97

5,543

$

3,447,027

Under the Repurchase Program, we are authorized to repurchase up to $15.0 million of our Class A common stock, as 
increased by the Board of Directors in February 2017. Stock repurchases may be made from time to time through the open 
market and privately negotiated transactions. The amount and timing of any share repurchases will depend upon a variety of 
factors, including the trading price of our Class A common stock, liquidity, securities laws restrictions, other regulatory 
restrictions, potential alternative uses of capital, and market and economic conditions.  The Repurchase Program may be 
suspended or terminated at any time without prior notice, and has no expiration date.

Item 6.  Selected Financial Data

You should read the following selected consolidated financial data in conjunction with Item 7 “Management’s Discussion 
and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and the related notes 
appearing in Item 8 “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K. We prepare our 
financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”).

We derived the consolidated statements of income (loss) data for the years ended December 31, 2018, 2017, and 2016 and 

the consolidated balance sheet data as of December 31, 2018 and 2017 from our audited consolidated financial statements 
appearing in Item 8 of this Annual Report on Form 10-K. We derived the consolidated statements of income (loss) data for the 
years ended December 31, 2015 and 2014, and the consolidated balance sheet data as of December 31, 2016, 2015, and 2014, 
from our audited consolidated financial statements that are not included in this Annual Report on Form 10-K. Our historical 
results are not necessarily indicative of the results to be expected in any future period. 

252018

2017

Year Ended December 31,
2016
(in thousands, except per share data)

2015

2014

Consolidated Statements of Income (Loss)
Data:
Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative expenses . . . . .
Operating income . . . . . . . . . . . . . . . . . . . . . . . .
Other expenses, net. . . . . . . . . . . . . . . . . . . . . . . . .
Income before provision for income taxes . . . . .
Income tax provision (benefit) . . . . . . . . . . . . . . . .
Net income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss attributable to redeemable non-
controlling interest . . . . . . . . . . . . . . . . . . . . . . . . .
Net income attributable to common shareholders . $
Net income per share attributable to common
shareholders: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

787,138

$

717,152

$

651,227

$

630,832

$

593,241

613,526

173,612

114,513

59,099

16,709

42,390

4,813

37,577

572,994

144,158

107,570

36,588

7,871

28,717
(4,791)
33,508

516,883

134,344

110,568

23,776

7,409

16,367

4,370

11,997

513,768

117,064

110,007

7,057

6,765

292

4,976
(4,684)

476,309

116,932

103,781

13,151

6,859

6,292
(4,091)
10,383

407

3,983

35

5,528

—

37,984

$

37,491

$

12,032

$

844

$

10,383

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Diluted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

0.83

0.81

$

$

0.82

0.82

$

$

0.26

0.26

$

$

0.02

0.02

$

$

0.22

0.22

Weighted average common shares outstanding:. . .
Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45,729

46,831

45,509

45,748

46,409

46,493

46,494

47,665

46,162

47,028

2018

2017

As of December 31,
2016
(in thousands)

2015

2014

Consolidated Balance Sheet Data:
Cash and cash equivalents . . . . . . . . . . . . . . . . . . . $
Current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Federal ESPC receivable(1). . . . . . . . . . . . . . . . . . .
Energy assets, net . . . . . . . . . . . . . . . . . . . . . . . . . .
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term debt, less current portion . . . . . . . . . . .
Federal ESPC liabilities(1) . . . . . . . . . . . . . . . . . . .
Total stockholders’ equity . . . . . . . . . . . . . . . . . . . $

61,397

$

24,262

$

20,607

$

21,645

$

23,762

310,969

293,998

459,952

1,161,634

222,630

219,162

288,047

287,078

248,917

356,443

983,951

202,142

173,237

235,088

226,061

158,209

319,758

797,281

190,602

140,593

133,003

263,698

125,804

244,309

723,440

179,723

100,490

122,040

215,795

79,167

217,772

617,550

142,934

85,724

70,875

376,875

$

336,620

$

294,306

$

287,409

$

286,306

(1) Federal ESPC receivable represents the amount to be paid by various federal government agencies for work performed and earned
by the Company under specific ESPCs. The Company assigns certain of its rights to receive those payments to third-party investors
that provide construction and permanent financing for such contracts. Federal ESPC liabilities represent the advances received from
third party investors under agreements to finance certain energy savings performance contract projects with various federal
government agencies. Upon completion and acceptance of the project by the government, typically within 24 - 36 months of
construction commencement, the ESPC receivable from the Government and corresponding related ESPC liability is eliminated
from our consolidated balance sheet. Until recourse to us ceases for the ESPC receivables transferred to the investor, upon final
acceptance of the work by the Government customer, we remain the primary obligor for financing received.

26Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion and analysis of our financial condition and results of operations together with 
our consolidated financial statements and the related notes and other financial information included in Item 8 of this Annual 
Report on Form 10-K. Some of the information contained in this discussion and analysis or set forth elsewhere in this Report, 
including information with respect to our plans and strategy for our business and related financing, includes forward-looking 
statements that involve risks and uncertainties. You should review the “Risk Factors” included in Item 1A of this Annual Report 
on Form 10-K for a discussion of important factors that could cause actual results to differ materially from the results 
described in or implied by the forward-looking statements contained in the following discussion and analysis.

Overview

Ameresco is a leading provider of energy efficiency solutions for facilities throughout North America and Europe. We 
provide solutions that enable customers to reduce their energy consumption, lower their operating and maintenance costs and 
realize environmental benefits. Our comprehensive set of services includes upgrades to a facility’s energy infrastructure and the 
construction and operation of small-scale renewable energy plants. 

In addition to organic growth, strategic acquisitions of complementary businesses and assets have been an important part of 

our historical development. Since inception, we have completed numerous acquisitions, which have enabled us to broaden our 
service offerings and expand our geographical reach.

Energy Savings Performance and Energy Supply Contracts

For our energy efficiency projects, we typically enter into ESPCs, under which we agree to develop, design, engineer and 

construct a project and also commit that the project will satisfy agreed-upon performance standards that vary from project to 
project. These performance commitments are typically based on the design, capacity, efficiency or operation of the specific 
equipment and systems we install. Our commitments generally fall into three categories: pre-agreed, equipment-level and whole 
building-level. Under a pre-agreed energy reduction commitment, our customer reviews the project design in advance and 
agrees that, upon or shortly after completion of installation of the specified equipment comprising the project, the commitment 
will have been met. Under an equipment-level commitment, we commit to a level of energy use reduction based on the 
difference in use measured first with the existing equipment and then with the replacement equipment. A whole building-level 
commitment requires demonstration of energy usage reduction for a whole building, often based on readings of the utility meter 
where usage is measured. Depending on the project, the measurement and demonstration may be required only once, upon 
installation, based on an analysis of one or more sample installations, or may be required to be repeated at agreed upon intervals 
generally over up to 23 years.

Under our contracts, we typically do not take responsibility for a wide variety of factors outside of our control and exclude 

or adjust for such factors in commitment calculations. These factors include variations in energy prices and utility rates, 
weather, facility occupancy schedules, the amount of energy-using equipment in a facility and the failure of the customer to 
operate or maintain the project properly. Typically, our performance commitments apply to the aggregate overall performance 
of a project rather than to individual energy efficiency measures. Therefore, to the extent an individual measure underperforms, 
it may be offset by other measures that overperform during the same period. In the event that an energy efficiency project does 
not perform according to the agreed-upon specifications, our agreements typically allow us to satisfy our obligation by 
adjusting or modifying the installed equipment, installing additional measures to provide substitute energy savings or paying 
the customer for lost energy savings based on the assumed conditions specified in the agreement. Many of our equipment 
supply, local design and installation subcontracts contain provisions that enable us to seek recourse against our vendors or 
subcontractors if there is a deficiency in our energy reduction commitment. See “We may have liability to our customers under 
our ESPCs if our projects fail to deliver the energy use reductions to which we are committed under the contract” in Item 1A, 
Risk Factors in this Annual Report on Form 10-K.

Payments by the federal government for energy efficiency measures are based on the services provided and the products 
installed, but are limited to the savings derived from such measures, calculated in accordance with federal regulatory guidelines 
and the specific contract’s terms. The savings are typically determined by comparing energy use and other costs before and after 
the installation of the energy efficiency measures, adjusted for changes that affect energy use and other costs but are not caused 
by the energy efficiency measures.

27For projects involving the construction of a small-scale renewable energy plant that we own and operate, we generally 
enter into long-term contracts to supply the electricity, processed LFG, heat or cooling generated by the plant to the customer, 
which is typically a utility, municipality, industrial facility or other large purchaser of energy. The rights to use the site for the 
plant and purchase of renewable fuel for the plant are also obtained by us under long-term agreements with terms at least as 
long as the associated output supply agreement. Our supply agreements typically provide for fixed prices or prices that escalate 
at a fixed rate or vary based on a market benchmark. See “We may assume responsibility under customer contracts for factors 
outside our control, including, in connection with some customer projects, the risk that fuel prices will increase” in reference 
Item 1A, Risk Factors in this Annual Report on Form 10-K.

Project Financing

To finance projects with federal governmental agencies, we typically sell to third-party lenders our right to receive a 
portion of the long-term payments from the customer arising out of the project for a purchase price reflecting a discount to the 
aggregate amount due from the customer. The purchase price is generally advanced to us over the implementation period based 
on completed work or a schedule predetermined to coincide with the construction of the project. Under the terms of these 
financing arrangements, we are required to complete the construction or installation of the project in accordance with the 
contract with our customer, and the liability remains on our consolidated balance sheet until the completed project is accepted 
by the customer. Once the completed project is accepted by the customer, the financing is treated as a true sale and the related 
receivable and financing liability are removed from our consolidated balance sheet.

Institutional customers, such as state, provincial and local governments, schools and public housing authorities, typically 
finance their energy efficiency and renewable energy projects through either tax-exempt leases or issuances of municipal bonds. 
We assist in the structuring of such third-party financing.

In some instances, customers prefer that we retain ownership of the renewable energy plants and related energy assets that 
we construct for them. In these projects, we typically enter into a long-term supply agreement to furnish electricity, gas, heat or 
cooling to the customer’s facility. To finance the significant upfront capital costs required to develop and construct the plant, we 
rely either on our internal cash flow or, in some cases, third-party debt. For project financing by third-party lenders, we 
typically establish a separate subsidiary, usually a limited liability company, to own the energy assets and related contracts. The 
subsidiary contracts with us for construction and operation of the project and enters into a financing agreement directly with the 
lenders. Additionally, we will provide assurance to the lender that the project will achieve commercial operation. Although the 
financing is secured by the assets of the subsidiary and a pledge of our equity interests in the subsidiary, and is non-recourse to 
Ameresco, Inc., we may from time to time determine to provide financial support to the subsidiary in order to maintain rights to 
the project or otherwise avoid the adverse consequences of a default. The amount of such financing is included on our 
consolidated balance sheet.

Effects of Seasonality

We are subject to seasonal fluctuations and construction cycles, particularly in climates that experience colder weather 
during the winter months, such as the northern United States and Canada, or at educational institutions, where large projects are 
typically carried out during summer months when their facilities are unoccupied. In addition, government customers, many of 
which have fiscal years that do not coincide with ours, typically follow annual procurement cycles and appropriate funds on a 
fiscal-year basis even though contract performance may take more than one year. Further, government contracting cycles can be 
affected by the timing of, and delays in, the legislative process related to government programs and incentives that help drive 
demand for energy efficiency and renewable energy projects. As a result, our revenues and operating income in the third and 
fourth quarter are typically higher, and our revenues and operating income in the first quarter are typically lower, than in other 
quarters of the year. As a result of such fluctuations, we may occasionally experience declines in revenues or earnings as 
compared to the immediately preceding quarter, and comparisons of our operating results on a period-to-period basis may not 
be meaningful.

Our annual and quarterly financial results are also subject to significant fluctuations as a result of other factors, many of 
which are outside our control. See “Our business is affected by seasonal trends and construction cycles, and these trends and 
cycles could have an adverse effect on our operating results” in Item 1A, Risk Factors in this Annual Report on Form 10-K.

Backlog and Awarded Projects

Total construction backlog represents projects that are active within our ESPC sales cycle.  Our sales cycle begins with the 
initial contact with the customer and ends, when successful, with a signed contract, also referred to as fully-contracted backlog. 

28Our sales cycle recently has been averaging 18 to 42 months. Awarded backlog is created when a potential customer awards a 
project to Ameresco following a request for proposal. Once a project is awarded but not yet contracted, we typically conduct a 
detailed energy audit to determine the scope of the project as well as identify the savings that may be expected to be generated 
from upgrading the customer’s energy infrastructure. At this point, we also determine the sub-contractor, what equipment will 
be used, and assist in arranging for third party financing, as applicable. Recently, awarded projects have been taking an average 
of 12 to 24 months to result in a signed contract and convert to fully-contracted backlog. It may take longer, however, 
depending upon the size and complexity of the project. Historically, approximately 90% of our awarded backlog projects have 
resulted in a signed contract. After the customer and Ameresco agree to the terms of the contract and the contract becomes 
executed, the project moves to fully-contracted backlog. The contracts reflected in our fully-contracted backlog typically have a 
construction period of 12 to 36 months and we typically expect to recognize revenue for such contracts over the same period. 
Fully-contracted backlog begins converting into revenues generated from backlog over time using cost based input methods 
once construction has commenced. See “We may not recognize all revenues from our backlog or receive all payments 
anticipated under awarded projects and customer contracts” and “In order to secure contracts for new projects, we typically face 
a long and variable selling cycle that requires significant resource commitments and requires a long lead time before we realize 
revenues” in Item 1A, Risk Factors in our Annual Report on Form 10-K.

As of December 31, 2018, we had fully-contracted backlog of approximately $726.6 million in expected future revenues 
under signed customer contracts for the installation or construction of projects. We also had been awarded projects for which 
we had not yet signed customer contracts with estimated total future revenues of an additional $1,241.4 million. As of 
December 31, 2017, we had fully-contracted backlog of approximately $572.5 million in future revenues under signed customer 
contracts for the installation or construction of projects. We also had been awarded projects for which we had not yet signed 
customer contracts with estimated total future revenues of an additional $1,199.0 million. As of December 31, 2016, we had 
backlog of approximately $534.1 million in expected future revenues under signed customer contracts for the installation or 
construction of projects. We also had been awarded projects for which we had not yet signed customer contracts with estimated 
total future revenues of an additional $957.6 million.

We define our 12-month backlog as the estimated amount of revenues that we expect to recognize in the next twelve 
months from our fully-contracted backlog. As of December 31, 2018 and 2017, our 12-month backlog was $360.5 million and 
$348.0 million, respectively.

Assets in development, which represents the potential design/build project value of small-scale renewable energy plants 

that have been awarded or for which we have secured development rights, was approximately $424.7 million and $165.8 
million as of December 31, 2018 and 2017, respectively.

Financial Operations Overview

Revenues

We derive revenues principally from energy efficiency projects, which entails the design, engineering and installation of 

equipment and other measures that incorporate a range of innovative technology and techniques to improve the efficiency and 
control the operation of a facility’s energy infrastructure; this can include designing and constructing for a customer a central 
plant or cogeneration system providing power, heat and/or cooling to a building, or other small-scale plant that produces 
electricity, gas, heat or cooling from renewable sources of energy.  We also derive revenue from: long-term O&M contracts;  
energy supply contracts for renewable energy operating assets that we own; integrated-PV; and consulting and enterprise energy 
management services.

Historically, including for the years ended December 31, 2018, 2017 and 2016, approximately 77% of our revenues have 

been derived from federal, state, provincial or local government entities, including public housing authorities and public 
universities.

Cost of Revenues and Gross Margin

Cost of revenues include the cost of labor, materials, equipment, subcontracting and outside engineering that are required 

for the development and installation of our projects, as well as pre-construction costs, sales incentives, associated travel, 
inventory obsolescence charges, amortization of intangible assets related to customer contracts, and, if applicable, costs of 
procuring financing. A majority of our contracts have fixed price terms; however, in some cases we negotiate protections, such 
as a cost-plus structure, to mitigate the risk of rising prices for materials, services and equipment.

29Cost of revenues also include costs for the small-scale renewable energy plants that we own, including the cost of fuel (if 

any) and depreciation charges.

As a result of certain acquisitions, we have intangible assets related to customer contracts; these are amortized over a 
period of approximately one to eight years from the respective date of acquisition. This amortization is recorded as a cost of 
revenues in the consolidated statements of income (loss).  Amortization expense for the year ended December 31, 2018 related 
to customer contracts was not significant. 

Gross margin, which is gross profit as a percent of revenues, is affected by a number of factors, including the type of 
services performed. Renewable energy projects that we own and operate typically have higher margins than energy efficiency 
projects, and sales in the United States typically have higher margins than in Canada due to the typical mix of products and 
services that we sell there. In addition, gross margin frequently varies across the construction period of a project. Our expected 
gross margin on, and expected revenues for, a project are based on budgeted costs. In some cases, actual costs incurred, or 
expected to be incurred, exceed the budgeted costs. In this case, we will adjust the revenue accordingly as a result of a slower 
progress-towards-completion estimate on a lower project gross margin estimate. From time to time, a portion of the 
contingencies reflected in budgeted costs are not incurred due to strong execution performance. In that case, and generally at 
project completion, we recognize revenues for which there is no further corresponding cost of revenues. As a result, gross 
margin tends to be backloaded for projects with strong execution performance; this explains the gross margin improvement that 
occurs from time to time at project closeout. 

Selling, General and Administrative Expenses

Selling, general and administrative expenses include salaries and benefits, project development costs, and general and 

administrative expenses not directly related to the development or installation of projects. 

Salaries and benefits. Salaries and benefits consist primarily of expenses for personnel not directly engaged in specific 

project or revenue generating activity. These expenses include the time of executive management, legal, finance, accounting, 
human resources, information technology and other staff not utilized in a particular project. We employ a comprehensive time 
card system which creates a contemporaneous record of the actual time by employees on project activity. 

Project development costs. Project development costs consist primarily of sales, engineering, legal, finance and third-party 

expenses directly related to the development of a specific customer opportunity. This also includes associated travel and 
marketing expenses. 

General and administrative expenses. These expenses consist primarily of rents and occupancy, professional services, 
insurance, unallocated travel expenses, telecommunications, office expenses and amortization of intangible assets not related to 
customer contracts. Professional services consist principally of recruiting costs, external legal, audit, tax and other consulting 
services. For the years ended December 31, 2018 and 2017, we recorded amortization expense of $1.0 million and $1.4 million, 
respectively, related to customer relationships, non-compete agreements, technology and trade names. Amortization expense 
related to these intangible assets is included in selling, general and administrative expenses in the consolidated statements of 
income (loss). 

Other Expenses, Net

Other expenses, net, includes gains and losses from derivatives, interest income and expenses, amortization of deferred 
financing costs, net, and foreign currency transaction gains and losses. Interest expense will vary periodically depending on the 
amounts drawn on our revolving senior secured credit facility and the prevailing short-term interest rates.

Provision or Benefit for Income Taxes

The provision or benefit for income taxes is based on various rates set by federal and local authorities and is affected by 

permanent and temporary differences between financial accounting and tax reporting requirements.

Critical Accounting Policies and Estimates

This discussion and analysis of our financial condition and results of operations is based upon our consolidated financial 
statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The 
preparation of these consolidated financial statements requires management to make estimates and assumptions that affect the 
reported amounts of assets, liabilities, revenue, expense and related disclosures. The most significant estimates with regard to 
these consolidated financial statements relate to our estimates of uninstalled materials under the revenue recognition 

30requirements of contracts with our customers, allowance for doubtful accounts, inventory reserves, realization of project 
development costs, fair value of derivative financial instruments, accounting for business acquisitions, stock-based awards, 
impairment of long-lived assets, income taxes, self insurance reserves and potential liability in conjunction with certain 
commitments and contingencies. Actual results could differ from those estimates. 

Such estimates and assumptions are based on historical experience and on various other factors that management believes 
to be reasonable under the circumstances. Estimates and assumptions are made on an ongoing basis, and accordingly, the actual 
results may differ from these estimates under different assumptions or conditions.

The following are critical accounting policies that, among others, affect our more significant judgments and estimates used 

in the preparation of our consolidated financial statements.

Revenue Recognition

On January 1, 2018, we adopted ASU 2014-09, “Revenue from Contracts with Customers” (Topic 606) using the modified 

retrospective method applied to those contracts which were not completed as of December 31, 2017. Results for reporting 
periods beginning January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to 
be reported under the accounting standards in effect for the prior periods. We recorded an adjustment to retained earnings on 
January 1, 2018 due to the cumulative impact of adopting Topic 606. See Note 3 "Revenue from Contracts with Customers" for 
the required disclosures related to the impact of adopting this standard and a discussion of updated policies related to revenue 
recognition discussed below. 

We derive revenues from energy efficiency and renewable energy products and services. Energy efficiency products and 

services include the design, engineering, and installation of equipment and other measures to improve the efficiency, and 
control the operation, of a facility’s energy infrastructure. Renewable energy products and services include the construction of 
small-scale plants that produce electricity, gas, heat or cooling from renewable sources of energy, the sale of such electricity, 
gas, heat or cooling from plants that we own, and the sale and installation of solar energy products and systems. Below is a 
description of our primary lines of business. 

Projects - Our principal service relates to energy efficiency projects, which entails the design, engineering and installation 

of, and assisting with the arranging of financing for an ever-increasing array of innovative technologies and techniques to 
improve the energy efficiency, and control the operation, of a building’s energy- and water- consuming systems. In certain 
projects, we also designed and constructed for a customer a central plant or cogeneration system providing power, heat and/or 
cooling to a building, or a small-scale plant that produces electricity, gas, heat or cooling from renewable sources of energy. 

Under Topic 606 requirements, we recognize revenue from the installation or construction of projects over time using the 

cost-based input method. We use the total costs incurred on the the project relative to the total expected costs to satisfy the 
performance obligation.  

When the estimate on a contract indicates a loss, or claims against costs incurred reduce the likelihood of recoverability of 

such costs, we record the entire estimated loss in the period the loss becomes known. 

Operations & Maintenance (“O&M”) - After an energy efficiency or renewable energy project is completed, we often 
provide ongoing O&M services under a multi-year contract. These services include operating, maintaining and repairing facility 
energy systems such as boilers, chillers and building controls, as well as central power and other small-scale plants. For larger 
projects, we frequently maintain staff on-site to perform these services.

Maintenance revenue uses the input method to recognize revenue. In most cases, O&M fees are fixed annual fees. Because 

we are on-site to perform O&M services, the services are typically a distinct series of promises, and those services have the 
same pattern of transfer to the customer (i.e., evenly over time), we record the revenue on a straight-line basis. Some O&M 
service contract fees are billed on time expended. In those cases, revenue is recorded based on the time expended in that month. 

Energy Assets - Our service offerings also include the sale of electricity, processed renewable gas fuel, heat or cooling from 
the portfolio of assets that we own and operate. We have constructed and are currently designing and constructing a wide range 
of renewable energy plants using landfill gas (“LFG”), wastewater treatment biogas, solar, biomass, other bio-derived fuels, 
wind and hydro sources of energy. Most of our renewable energy projects to date have involved the generation of electricity 
from solar PV and LFG or the sale of processed LFG. We purchase the LFG that otherwise would be combusted or flared, 
processes it, and either sell it or use it in our energy plants. We also design and build, as well as own, operate and maintain, 
plants that take biogas generated in the anaerobic digesters of wastewater treatment plants and turn it into renewable natural gas 

31that is either used to generate energy on-site or that can be sold through the nation’s natural gas pipeline grid. Where we own 
and operate energy producing assets, we typically enter into a long-term power purchase agreement (“PPA”) for the sale of the 
energy. Many of our energy assets also produce environmental attributes, including renewable energy credits (“RECs”) and 
Renewable Identification Numbers (“RINs”). In most cases, we sell these attributes under separate agreements with third 
parties other than the PPA customer.

We recognize revenues from the sale and delivery of the energy output from renewable energy plants, over time as 
produced and delivered to the customer, in accordance with specific PPA contract terms. Environmental attributes revenue is 
recognized at a point in time, when the environmental attributes are transferred to the customer in accordance with the transfer 
protocols of the attribute market that we operate in. In those cases where environmental attributes are sold to the same customer 
as the energy output, we record revenue monthly for both the energy output and the environmental attributes output, as 
generated and delivered to the customer. 

Other - Our service and product offerings also include integrated-PV and consulting and enterprise energy management 

services.

We recognize revenues from delivery of engineering, consulting services and enterprise energy management services over 
time.  For the sale of solar materials, revenue is recognized at a point in time when we have transferred physical control of the 
asset to the customer upon shipment.  

To the extent a contract is deemed to have multiple performance obligations, we allocate the transaction price of the 

contract to each performance obligation using its best estimate of the standalone selling price of each distinct good or service in 
the contract. 

Billings in excess of cost and estimated earnings represents advanced billings on certain construction contracts. Costs and 

estimated earnings in excess of billings represent certain amounts under customer contracts that were earned and billable but 
not invoiced.

Results for reporting periods beginning January 1, 2018 are presented under Topic 606, while prior period amounts are not 

adjusted and continue to be reported under ASC 605, Revenue Recognition.  

Project Development Costs

We capitalize as project development costs only those costs incurred in connection with the development of energy 

efficiency and renewable energy projects, primarily direct labor, interest costs, outside contractor services, consulting fees, legal 
fees and associated travel, if incurred after a point in time when the realization of related revenue becomes probable. Project 
development costs incurred prior to the probable realization of revenues are expensed as incurred.

Energy Assets

Energy assets consist of costs of materials, direct labor, interest costs, outside contract services, deposits and project 
development costs incurred in connection with the construction of small-scale renewable energy plants that we own. These 
amounts are capitalized and amortized to cost of revenues in our consolidated statements of income (loss) on a straight line 
basis over the lives of the related assets or the terms of the related contracts.

We capitalize interest costs relating to construction financing during the period of construction. Capitalized interest is 
included in energy assets, net, in our consolidated balance sheets. Capitalized interest is amortized to cost of revenues in our 
consolidated statements of income (loss) on a straight line basis over the useful life of the associated energy asset. The amount 
of interest capitalized for the years ended December 31, 2018, 2017 and 2016 was $3.8 million, $4.3 million and $1.3 million, 
respectively. 

Routine maintenance costs are expensed in the current year’s consolidated statements of income (loss) to the extent that 
they do not extend the life of the asset. Major maintenance, upgrades and overhauls are required for certain components of our 
assets. In these instances, the costs associated with these upgrades are capitalized and are depreciated over the shorter of the 
remaining life of the asset or the period until the next required major maintenance or overhaul. 

We evaluate our long-lived assets for impairment as events or changes in circumstances indicate the carrying value of these 

assets may not be fully recoverable. Examples of such triggering events applicable to our assets include a significant decrease 
in the market price of a long-lived asset or asset group or a current-period operating or cash flow loss combined with a history 

32of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-
lived asset or asset group.

We evaluate recoverability of long-lived assets to be held and used by estimating the undiscounted future cash flows 
associated with the expected uses and eventual disposition of those assets. When these comparisons indicate that the carrying 
value of those assets is greater than the undiscounted cash flows, we recognize an impairment loss for the amount that the 
carrying value exceeds the fair value.

From time to time, we have applied for and received cash grant awards from the U.S. Treasury Department (the 

“Treasury”) under Section 1603 of the American Recovery and Reinvestment Act of 2009 (the “Act”).  The Act authorized the 
Treasury to make payments to eligible persons who place in service qualifying renewable energy projects.  The grants are paid 
in lieu of investment tax credits.  All of the cash proceeds from the grants were used and recorded as a reduction in the cost 
basis of the applicable energy assets.  If we dispose of the property, or the property ceases to qualify as specified energy 
property, within five years from the date the property is placed in service, then a prorated portion of the Section 1603 payment 
must be repaid.

We last received a Section 1603 grant during the year ended December 31, 2014. No further Section 1603 grant payments 

are expected to be received as the program has expired.

For tax purposes, the Section 1603 payments are not included in federal and certain state taxable income and the basis of 

the property is reduced by 50% of the payment received. Deferred grant income of $6.6 million and $7.2 million in the 
accompanying consolidated balance sheets at December 31, 2018 and 2017, respectively, represents the benefit of the basis 
difference to be amortized to income tax expense over the life of the related property.

Impairment of Goodwill and Intangible Assets

We have classified as goodwill the amounts paid in excess of fair value of the net assets (including tax attributes) of companies 
acquired in purchase transactions. We have recorded intangible assets related to customer contracts, customer relationships, non-
compete agreements, trade names and technology, each with defined useful lives. We assess the impairment of goodwill and 
intangible assets that have indefinite lives on an annual basis (December 31st) and whenever events or changes in circumstances 
indicate that the carrying value of the asset may not be recoverable. 

Goodwill is reviewed for impairment annually and whenever events or changes in circumstances indicate that the carrying 
value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill requires significant 
judgment. We regularly monitor current business conditions and other factors including, but not limited to, adverse industry or 
economic trends, restructuring actions and projections of future results.  We estimate the reporting unit’s fair value and compare 
it with the carrying value of the reporting unit, including goodwill. If the fair value is greater than the carrying value of its reporting 
unit, no impairment is recorded.  Fair value is determined using both an income approach and a market approach. The estimates 
and assumptions used in our calculations include revenue growth rates, expense growth rates, expected capital expenditures to 
determine projected cash flows, expected tax rates and an estimated discount rate to determine present value of expected cash 
flows. These estimates are based on historical experiences, our projections of future operating activity and our weighted-average 
cost of capital.  

Acquired intangible assets other than goodwill that are subject to amortization include customer contracts and customer 
relationships, as well as software/technology, trade names and non-compete agreements.  The intangible assets are amortized over 
periods ranging from one to fifteen years from their respective acquisition dates. We evaluate the intangible assets for impairment 
consistent with, and part of, their long-lived assets evaluation, as discussed in Energy Assets above.

Impairment of Long-Lived Assets

We use the guidance prescribed in ASC 360, Property, Plant and Equipment, for the proper testing and valuation methodology 
to ensure we record any impairment when the carrying amount of a long-lived asset is not recoverable equivalent to an amount 
equal to its fair market value.

We review long-lived asset groups for potential impairment whenever events or changes in circumstances indicate that the 
carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Examples 

33of such triggering events applicable to our asset groups include a significant decrease in the market price of a long-lived asset 
group or a current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or 
forecast that demonstrates continuing losses associated with the use of a long-lived asset group, among others.

Should an asset group be identified as potentially impaired based on the defined criteria, an impairment test is performed 
that includes a comparison of the estimated undiscounted cash flows of the asset as compared to the recorded value of the asset. 
If these estimates or their related assumptions change in the future, an impairment charge may be required against these assets in 
the reporting period in which the impairment is determined.

Derivative Financial Instruments

We account for our interest rate swaps and commodity swaps as derivative financial instruments. As required under GAAP, 
derivatives are carried on our consolidated balance sheets at fair value. The fair value of our interest rate and commodity swaps 
are determined based on observable market data in combination with expected cash flows for each instrument.

We follow the guidance which expands the disclosure requirements for derivative instruments and hedging activities.

In the normal course of business, we utilize derivative contracts as part of our risk management strategy to manage 
exposure to market fluctuations in interest rates and natural gas prices. These instruments are subject to various credit and 
market risks. Controls and monitoring procedures for these instruments have been established and are routinely reevaluated. 
Credit risk represents the potential loss that may occur because a party to a transaction fails to perform according to the terms of 
the contract. The measure of credit exposure is the replacement cost of contracts with a positive fair value. We seek to manage 
credit risk by entering into financial instrument transactions only through counterparties that we believe to be creditworthy. 
Market risk represents the potential loss due to the decrease in the value of a financial instrument caused primarily by changes 
in interest rates and natural gas prices. We seek to manage market risk by establishing and monitoring limits on the types and 
degree of risk that may be undertaken. As a matter of policy, we do not use derivatives for speculative purposes.

We are exposed to interest rate risk through our borrowing activities. A portion of our project financing includes thirteen 
credit facilities that utilize a variable rate swap instrument.  We are also exposed to commodity price risk through our variable 
rate commodity swap instruments. We have three commodity swaps as of December 31, 2018.

In June 2018, the Company entered into a term loan agreement, discussed in Note 8, that contained an interest make-whole 

provision.  In August 2018, the Company signed a joinder to the above agreement, which added another series of notes to the 
term loan that also contained an interest make-whole provision.  The Company determined that these provisions fulfill the 
requirements of embedded derivative instruments that were required to be bifurcated from the host agreement. The fair value of 
these make-whole provisions was determined based on available market data and a with and without model. 

The following tables present a listing of all our active derivative instruments as of December 31, 2018 ($ in thousands):

34Active Interest Rate Swap

Effective Date

Expiration Date

October 2029

June 2033

11-Year, 5.77% Fixed . . . . . . . . . . . . October 2018
15-Year, 3.19% Fixed . . . . . . . . . . . . June 2018
3-Year, 2.46% Fixed . . . . . . . . . . . . . March 2018
10-Year, 4.74% Fixed . . . . . . . . . . . . June 2017
15-Year, 3.26% Fixed . . . . . . . . . . . . February 2023
7-Year, 2.19% Fixed . . . . . . . . . . . . . February 2016
8-Year, 3.70% Fixed . . . . . . . . . . . . . March 2020
8-Year, 3.70% Fixed . . . . . . . . . . . . . March 2020
8-Year, 1.71% Fixed . . . . . . . . . . . . . October 2012
8-Year, 1.71% Fixed . . . . . . . . . . . . . October 2012
15-Year, 5.30% Fixed . . . . . . . . . . . . February 2006
15.5-Year, 5.40% Fixed . . . . . . . . . . September 2008 March 2024

March 2020

March 2020

June 2028

June 2028

December 2020

December 2027

December 2038

February 2023

February 2021

Initial Notional
Amount ($)

Status

$

9,200 Designated

10,000 Designated

17,100 Not Designated

14,100 Designated

14,084 Designated

20,746 Designated

14,643 Designated

10,734 Designated

9,665 Designated

7,085 Designated

3,256 Designated

13,081 Designated

Active Commodity Swap

Effective
Date
1-Year, $2.84 MMBtu Fixed. . . . . . . May 2018
1-Year, $2.68 MMBtu Fixed. . . . . . . May 2019
1-Year, $2.70 MMBtu Fixed. . . . . . . May 2020

Expiration
Date

April 2019

April 2020

April 2021

Initial
Notional
Amount
(Volume)

Commodity
Measurement

Status

323,390 MMBtus

Not Designated

437,004 MMBtus

Not Designated

435,810 MMBtus

Not Designated

Other Derivatives

Classification

Effective Date

Expiration Date

Fair Value ($)

Interest make-whole provisions . . . . Liability

June/August
2018

December 2038

$

1,808

We entered into each of the interest rate and commodity swap contracts as an economic hedge.

We recognize all derivatives in our consolidated financial statements at fair value.

We recognize the fair value of derivative instruments designated as hedges in our consolidated balance sheets and any 
changes in the fair value are recorded as adjustments to other comprehensive income (loss) if the hedges operate effectively.

Income Taxes

We provide for income taxes based on the liability method. We provide for deferred income taxes based on the expected 
future tax consequences of differences between the financial statement basis and the tax basis of assets and liabilities calculated 
using the enacted tax rates in effect for the year in which the differences are expected to be reflected in the tax return.

We account for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving uncertain tax 

positions. The evaluation of uncertain tax positions is based on factors that include, but are not limited to, changes in tax law, 
the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to 
audit, new audit activity and changes in facts or circumstances related to a tax position. We evaluate uncertain tax positions on a 
quarterly basis and adjust the level of the liability to reflect any subsequent changes in the relevant facts surrounding the 
uncertain positions. Our liabilities for an uncertain tax position can be relieved only if the contingency becomes legally 
extinguished through either payment to the taxing authority or the expiration of the statute of limitations, the recognition of the 
benefits associated with the position meet the “more-likely-than-not” threshold or the liability becomes effectively settled 
through the examination process. We consider matters to be effectively settled once: the taxing authority has completed all of its 

35required or expected examination procedures, including all appeals and administrative reviews; we have no plans to appeal or 
litigate any aspect of the tax position and we believe that it is highly unlikely that the taxing authority would examine or re-
examine the related tax position. We also accrue for potential interest and penalties, related to unrecognized tax benefits in 
income tax expense.

We have presented all deferred tax assets and liabilities as noncurrent on our consolidated balance sheet as of December 

31, 2018, 2017 and 2016, respectively.

The 2017 Tax Cuts and Jobs Act (the “2017 Tax Act”) was signed into law on December 22, 2017. The 2017 Tax Act 
significantly revised the U.S. corporate income tax by, among other things, lowering the statutory corporate tax rate from 
35% to 21%, eliminating certain deductions, imposing a mandatory one-time tax on accumulated earnings of foreign 
subsidiaries as of 2017, introducing new tax regimes, and changing how foreign earnings are subject to U.S. tax for years 
after 2017. The 2017 Tax Act also enhanced and extended through 2026 the option to claim accelerated depreciation 
deductions on qualified property and created limitations on the deductibility and timing of interest deductions. 

We recorded a tax benefit for the impact of the 2017 Tax Act of approximately $13.9 million in our consolidated financial 
statements during the year ended December 31, 2017. This amount was primarily comprised of the remeasurement of federal 
net deferred tax liabilities resulting from the permanent reduction in the U.S. statutory corporate tax rate from 35% to 21%.

The Tax Legislation provided for a one-time deemed mandatory repatriation for post-1986 undistributed foreign 

subsidiary earnings and profits (“E&P”) through the year ended December 31, 2017.  Our initial estimate showed a deficit in 
foreign E&P and significant foreign taxes paid, which could be creditable against any tax resulting from the deemed 
mandatory repatriation. During 2018 we finalized the calculations of our post-1986 E&P and determined that it resulted in a 
deficit and no deemed mandatory repatriation tax being due. 

On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 to address the application of U.S. 
GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including 
computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Legislation. We 
recognized the provisional tax impacts related to the revaluation of deferred tax assets and liabilities and included these 
amounts in our consolidated financial statements for the year ended December 31, 2017. During 2018 we finalized all of our 
tax accounting associated with the 2017 Tax Act without material adjustments and they are reflected in the financial 
statements as of December 31, 2018. 

In February 2018 the Code Section 179D Commercial Buildings Energy Efficiency Tax Deduction for 2017 was 
retroactively extended through December 31, 2017. Because of the timing of the extension the impact of the Section 179D 
deduction was not reflected in the 2017 tax provision but was instead reflected in 2018.

  Stock-Based Compensation Expense

Our stock-based compensation expense results from the issuances of shares of restricted common stock and grants of 
stock options to employees, directors, outside consultants and others. We recognize the costs associated with option grants 
using the fair value recognition provisions of ASC 718, Compensation — Stock Compensation. Generally, ASC 718 requires 
the value of all stock-based payments to be recognized in the statement of income (loss) based on their estimated fair value 
at date of grant amortized over the grants’ respective vesting periods.  For the years ended December 31, 2018, 2017 and 
2016, we recorded stock-based compensation expense of approximately $1.3 million, $1.3 million, and $1.5 million, 
respectively, in connection with stock-based payment awards. The compensation expense is allocated between cost of 
revenues and selling, general and administrative expenses in the accompanying consolidated statements of income (loss) 
based on the salaries and work assignments of the employees holding the options.

Stock Option Grants

We have granted stock options to certain employees and directors under our 2010 stock incentive plan and at 
December 31, 2018, 6,833 shares were available for grant under that plan. We have also granted stock options to certain 
employees and directors under our 2000 stock incentive plan; however, we will grant no further stock options or restricted 
stock awards under that plan.

Stock options issued under our 2000 stock incentive plan generally expire if not exercised within ten years after the grant 
date. Under the terms of our 2010 stock incentive plan, all options expire if not exercised within ten years after the grant date. 
During 2011, we began awarding options which typically vest over a five year period on an annual ratable basis.  If the 

36employee ceases to be employed for any reason before vested options have been exercised, the employee generally has three 
months to exercise vested options or they are forfeited. Certain option grants have performance conditions that must be 
achieved prior to vesting and are expensed based on the expected achievement at each reporting period. 

We follow the fair value recognition provisions of ASC 718 requiring that all stock-based payments to employees, 
including grants of employee stock options and modifications to existing stock options, be recognized in the consolidated 
statements of income (loss) based on their fair values, using the prospective-transition method.

We use the Black-Scholes option pricing model to determine the weighted-average fair value of options granted and record 

stock-based compensation expense utilizing the straight-line method.

The determination of the fair value of stock-based payment awards utilizing the Black-Scholes model is affected by the 

stock price and a number of assumptions, including expected volatility, expected life, risk-free interest rate and expected 
dividends. The following table sets forth the significant assumptions used in the model during 2018, 2017 and 2016:

Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2018
—%

Year Ended December 31,
2017
—%

2016
—%

2.71%-3.00%
43%-45%

1.96%-2.36%
46%

1.16%-1.77%
46%-49%

6.5 years

6.5 years

6.5-10 years

We will continue to use our judgment in evaluating the expected term, volatility and forfeiture rate related to our own 
stock-based compensation on a prospective basis, and incorporating these factors into the Black-Scholes pricing model. Higher 
volatility and longer expected lives result in an increase to stock-based compensation expense determined at the date of grant.  
These expenses will affect our cost of revenues as well as our selling, general and administrative expenses.

As of December 31, 2018, we had $3.1 million of total unrecognized stock-based compensation expense related to 
employee and director stock options. We expect to recognize this cost over a weighted-average period of 2.1 years after 
December 31, 2018. The allocation of this expense between cost of revenues and selling, general and administrative expenses 
will depend on the salaries and work assignments of the personnel holding these options.

Recent Accounting Pronouncements

See Note 2 of the “Notes to Consolidated Financial Statements” for a discussion of recent accounting standards.

Results of Operations

On January 1, 2018, the Company adopted new accounting guidance on revenue from contracts with customers, using the 
modified retrospective method applied to contracts that were not completed as of January 1, 2018. Results for reporting periods 
beginning after January 1, 2018 are presented under that guidance, while prior period amounts are not adjusted and continue to 
be reported in accordance with the previous guidance. See Note 3, Revenue From Contracts with Customers, of Notes to 
Consolidated Financial Statements for further details.

37The following table sets forth certain financial data from the consolidated statements of income (loss) expressed as a 

percentage of revenues for the periods indicated (in thousands):

2018

Year Ended December 31,
2017

2016

Dollar
Amount

% of
Revenues

Dollar
Amount

% of
Revenues

Dollar
Amount

% of
Revenues

100.0% $ 717,152

100.0 % $ 651,227

100.0%

173,612

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 787,138
Cost of revenues . . . . . . . . . . . . . . . . . . . . . . .
613,526
Gross profit . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative expenses .
Operating income . . . . . . . . . . . . . . . . . . . .
Other expenses, net. . . . . . . . . . . . . . . . . . . . .
Income before provision (benefit) for income
taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax (benefit) provision . . . . . . . . . . . .
Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Net loss attributable to redeemable non-
controlling interest . . . . . . . . . . . . . . . . . . . . . $

114,513

42,390

59,099

16,709

37,577

4,813

407

77.9%

22.1%

14.5%

7.5%

2.1%

5.4%

0.6%

4.8% $

572,994

144,158

107,570

36,588

7,871

28,717
(4,791)
33,508

79.9 %

20.1 %

15.0 %

5.1 %

1.1 %

4.0 %

(0.7)%

516,883

134,344

110,568

23,776

7,409

16,367

4,370

4.7 % $

11,997

0.1% $

3,983

0.6 % $

35

Net income attributable to common
shareholders . . . . . . . . . . . . . . . . . . . . . . . . . . $

37,984

4.8% $

37,491

5.2 % $

12,032

Revenues

The following table sets forth a comparison of our revenues for the periods indicated (in thousands):

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

787,138

$

717,152

$

69,986

9.8%

Year Ended December 31,
2017
2018

Dollar
Change

Percentage
Change

Year Ended December 31,
2016
2017

Dollar
Change

Percentage
Change

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

717,152

$

651,227

$

65,925

10.1%

Total revenues increased by $70.0 million, or 9.8%, from 2017 to 2018 primarily due to a $17.2 million increase in 
revenues from our U.S. Federal segment, a $3.4 million increase in revenues from our Non-solar Distributed Generation 
(“DG”) segment, a $44.1 million increase in revenues from our U.S. Regions segment and a $10.1 million increase from All 
Other. These increases were partially offset by a $4.8 million decrease in revenues from our Canada segment.

 Total revenues increased by $65.9 million, or 10.1%, from 2016 to 2017 primarily due to a $51.1 million increase in 
revenues from our U.S. Federal segment, a $4.8 million increase in revenues from our Non-solar DG segment, a $13.4 million 
increase in revenues from our U.S. Regions segment and a $3.2 million increase from All Other.  These increases were partially 
offset by a $6.6 million decrease in revenues from our Canada segment. 

79.4%

20.6%

17.0%

3.7%

1.1%

2.5%

0.7%

1.8%

—%

1.8%

38Cost of Revenues and Gross Margin

The following table sets forth a comparison of our cost of revenues and gross profit for the periods indicated (in 

thousands):

Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Gross margin % . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Gross margin % . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,
2017
2018
572,994
613,526

$

22.1%

20.1%

Year Ended December 31,
2016
2017
516,883
572,994

$

20.1%

20.6%

$

$

Dollar
Change

Percentage
Change

40,532

7.1%

Dollar
Change

Percentage
Change

56,111

10.9%

Cost of revenues. Total cost of revenues increased $40.5 million, or 7.1%, from 2017 to 2018 due primarily to an increase 
in project revenues from our U.S. Regions segment. Total cost of revenues increased by $56.1 million, or 10.9%, from 2016 to 
2017 due primarily to an increase in revenues from our U.S. Federal segment.

Gross margin. Gross margin increased from 20.1% in 2017 to 22.1% in 2018. The increase in gross margin is primarily due 

to an increase in higher margin energy and incentive revenue from renewable gas assets the Company owns in our Non-Solar 
DG segment. Gross margin decreased from 20.6% in 2016 to 20.1% in 2017. The decrease was due primarily to a mix of lower 
margin projects in our U.S. Regions segment.

Selling, General and Administrative Expenses

The following table sets forth a comparison of our selling, general and administrative expenses for the periods indicated (in 

thousands):

Selling, general and administrative expenses . . . . . . . $

114,513

$

107,570

$

6,943

6.5 %

Year Ended December 31,
2017
2018

Dollar
Change

Percentage
Change

Year Ended December 31,
2016
2017

Dollar
Change

Percentage
Change

Selling, general and administrative expenses . . . . . . . $

107,570

$

110,568

$

(2,998)

(2.7)%

Selling, general and administrative expenses increased $6.9 million or 6.5% to $114.5 million from $107.6 million from 

2017 to 2018 primarily due to an increase in salaries and benefits of $4.6 million resulting from increased headcount.

Selling, general and administrative expenses decreased $3.0 million or 2.7% to $107.6 million from $110.6 million from  

2016 to 2017, respectively, primarily due to $2.1 million in restructuring charges incurred during 2016, which included $1.9 
million in bad debt expense in our Canada segment related to our restructuring efforts, and $2.9 million in write-downs, 
primarily in accounts receivable related to a customer that declared bankruptcy during 2016, offset by higher project 
development costs incurred during 2017.

Other Expenses, Net

Other expenses, net, includes gains and losses from derivatives transactions, foreign currency transactions, interest 

expense, interest income and amortization of deferred financing costs, net. Other expenses, net, increased from 2017 to 2018 by 
$8.8 million primarily due to an increase in interest expense and unfavorable foreign exchange rate fluctuations realized. Other 
expenses, net, increased from 2016 to 2017 by $0.5 million primarily due to an increase in interest expense offset by favorable 
foreign exchange rate fluctuations realized in 2017.

Income Before Taxes

Income before taxes increased from 2017 to 2018 by $13.7 million, or 47.6% and increased from 2016 to 2017 by $12.4 

million, or 75.5%, primarily due to the reasons described above.

39Provision for Income Taxes

The provision (benefit) for income taxes is based on various rates set by federal, state, provincial and local authorities and 

is affected by permanent and temporary differences between financial accounting and tax reporting requirements.  During 2018, 
we recognized an income tax provision of $4.8 million, equivalent to an effective tax rate of 11.4%.  The effective tax rate 
increased for 2018 vs. 2017 primarily due to our recording a deferred U.S. tax benefit in 2017 of approximately $13.9 million, 
related to the revaluation of deferred tax assets and liabilities resulting from the reduced federal tax rate enacted in the 2017 Tax 
Act. During 2017, we recognized an income tax benefit of $4.8 million, equivalent to an effective tax rate of (16.7)%.  The 
effective tax rate decreased significantly primarily due to the change in the U.S. tax law.  

On December 22, 2017, the U.S. federal government enacted comprehensive tax legislation which significantly revised the 

U.S. corporate income tax law by, among other things, lowering the U.S. federal corporate income tax rate for the years  after 
2017 from 35% to 21%. In 2018 we benefited from the reduced federal tax rate and we also recognized a tax benefit of 
approximately $8.6 million associated with energy related credits and deductions available under the U.S. Tax Code. In 
February 2018 the Code Section 179D Commercial Buildings Energy Efficiency Tax Deduction for 2017 was retroactively 
extended through December 31, 2017. Because of the timing of the extension the impact of the Section 179D deduction was not 
reflected in the 2017 tax provision but was instead reflected in 2018. In addition, we also are entitled to Investment Tax Credits 
available under the Tax Code for renewable energy plants we develop and retain. The investment tax credits to which we are 
entitled fluctuate from year to year based on the cost of the renewable energy plants that we place or expect to place in service 
in that year.

During 2018, we recognized an income tax provision of $4.8 million, or 11.4% of pretax income. The principal reasons 
for the difference between the statutory rate and the estimated annual effective rate for 2018 related to our  recognizing a tax 
benefit of approximately $8.6 million associated with energy related credits and deductions available under the U.S. Tax Code 
as well as a deduction available under Section 179D of the Tax Code. In February 2018 the Code Section 179D Commercial 
Buildings Energy Efficiency Tax Deduction for 2017 was retroactively extended through December 31, 2017. Because of the 
timing of the extension the impact of the Section 179D deduction was not reflected in the 2017 tax provision but was instead 
reflected in 2018 .

The investment tax credits to which we are entitled fluctuate from year to year based on the cost of the renewable energy 
plants that we place or expect to place in service in that year. In February 2018 the Code Section 179D Commercial Buildings 
Energy Efficiency Tax Deduction for 2017 was retroactively extended through December 31, 2017. There is no guarantee it 
will be extended to December 31, 2018 or be available in future years.

Net Income

Net income increased $4.1 million to a net income of $37.6 million for the twelve months ended December 31, 2018 
compared to a net income of $33.5 million for the same period of 2017 for the reasons discussed above. Basic income per 
share for the twelve months ended December 31, 2018 was $0.83 per share, an increase of $0.01 per share, compared to the 
same period of 2017. Diluted income per share for the twelve months ended December 31, 2018 was $0.81 per share, a 
decrease of $0.01 per share, compared to the same period of 2017. 

Net income increased $21.5 million to a net income of $33.5 million for the twelve months ended December 31, 2017 
compared to a net income of $12.0 million for the same period of 2016 for the reasons discussed above. Basic and diluted 
income   per share for the twelve months ended December 31, 2017 were $0.82 per share, an increase of $0.56 per share, 
compared to the same period of 2016.

Business Segment Analysis (in thousands)

We report results under ASC 280, Segment Reporting. Our reportable segments for the year ended December 31, 2018 are 
U.S. Regions, U.S. Federal, Canada and Non-Solar Distributed Generation “DG”. Our U.S. Regions, U.S. Federal and Canada 
segments offer energy efficiency products and services, which include: the design, engineering and installation of equipment 
and other measures to improve the efficiency and control the operation of a facility’s energy infrastructure; renewable energy 
solutions and services, which include the construction of small-scale plants that we own or develop for customers that produce 
electricity, gas, heat or cooling from renewable sources of energy; and O&M services. Our Non-Solar DG segment sells 
electricity, processed renewable gas fuel, heat or cooling, produced from renewable sources of energy, other than solar, and 
generated by small-scale plants that we own. This segment also performs O&M services for customer-owned small-scale plants.  
As of December 31, 2017, the Company’s U.S. Regions segment now included certain small-scale solar grid-tie plants 

40developed for customers previously included in our Non-Solar DG segment. Previously reported amounts have been restated 
for comparative purposes. The “All Other” category offers enterprise energy management services, consulting services and 
integrated-PV. These segments do not include results of other activities, such as corporate operating expenses not specifically 
allocated to the segments. 

U.S. Regions

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $

334,344

20,543

$

$

290,196

13,865

Year Ended December 31,
2017
2018

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $

290,196

13,865

$

$

276,766

19,802

Year Ended December 31,
2016
2017

Dollar
Change

44,148

6,678

Dollar
Change

13,430
(5,937)

$

$

$

$

Percentage
Change

15.2 %

48.2 %

Percentage
Change

4.9 %

(30.0)%

Revenues for the U.S. Regions segment increased by $44.1 million, or 15.2%, to $334.3 million for the twelve months 
ended December 31, 2018 compared to the same period of 2017 primarily due to an increase in project revenues attributable to 
an increase in the average project size versus the prior year. 

Revenues for the U.S. Regions segment increased by $13.4 million, or 4.9%, to $290.2 million for the twelve months 
ended December 31, 2017 compared to the same period of 2016  primarily due to an increase in project revenues attributed to 
an increase in the average project size of projects versus the prior year.  Project revenues for the year ending December 31, 
2017 were negatively impacted by unanticipated delays caused by Hurricane Harvey.  These delays resulted in a shortfall in 
expected revenue of $12.5 million.

Income before taxes for the U.S. Regions segment increased by $6.7 million, or 48.2%, for the twelve months ended 

December 31, 2018 compared to the same period of 2017 primarily due to the increase in revenues described above.

Income before taxes for the U.S. Regions segment decreased by $5.9 million, or 30.0%, for the twelve months ended 
December 31, 2017 compared to the same period of 2016 primarily due to a decrease in gross profit attributed to the mix of 
lower margin projects. Results for the year ending December 31, 2017 were negatively impacted by unanticipated delays 
caused by Hurricane Harvey.  These delays resulted in a shortfall in expected earnings of $5.5 million.

U.S. Federal

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $

246,309

36,332

$

$

229,146

29,261

Year Ended December 31,
2017
2018

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $

229,146

29,261

$

$

178,005

22,246

Year Ended December 31,
2016
2017

Dollar
Change

17,163

7,071

Dollar
Change

51,141

7,015

$

$

$

$

Percentage
Change

7.5%

24.2%

Percentage
Change

28.7%

31.5%

Revenues for the U.S. Federal segment increased by $17.2 million, or 7.5%, to $246.3 million for the twelve months ended 
December 31, 2018 compared to the same period of 2017, primarily due to timing of revenue recognized as a result of the phase 
of active projects.

Revenues for the U.S. Federal segment increased by by $51.1 million, or 28.7%, to $229.1 million for the twelve months 
ended December 31, 2017 compared to the same period of 2016 primarily due to an increase in project revenues related to the 
increase in average project size of projects versus the prior year. This increase is primarily attributed to larger comprehensive 
projects which integrate multiple technologies.

41Income before taxes for the U.S. Federal segment increased by $7.1 million, or 24.2%, to $36.3 million for the twelve 
months ended December 31, 2018 compared to the same period of 2017 , primarily due to gross profit attributed to a favorable 
mix of higher margin projects.

Income before taxes for the U.S. Federal segment increased by $7.0 million, or 31.5%, to $29.3 million for the twelve 
months ended December 31, 2017 compared to the same period of 2016 primarily due to the increase in revenues described 
above partially offset by a budget revision on a large project in the second quarter of 2016.

Canada

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income (loss) before taxes . . . . . . . . . . . . . . . . . . . . . $

38,982
$
(2,746) $

43,803

1,751

$

$

(4,821)
(4,497)

(11.0)%

(256.8)%

Year Ended December 31,
2017
2018

Dollar
Change

Percentage
Change

Year Ended December 31,
2016
2017

Dollar
Change

Percentage
Change

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income (loss) before taxes . . . . . . . . . . . . . . . . . . . . . $

43,803

1,751

$

$

50,448
$
(2,330) $

(6,645)
4,081

(13.2)%

175.2 %

Revenues for the Canada segment decreased $4.8 million, or 11.0%, to $39.0 million for the twelve months ended 
December 31, 2018 compared to the same period of 2017 primarily due to a decrease in project revenues related to slower 
progression of certain active projects.

Revenues for the Canada segment decreased $6.6 million, or 13.2%, to $43.8 million for twelve months ended December 

31, 2017 compared to the same period in of 2016 primarily due to a decrease in project revenues related to a significant low 
margin project which was completed during the third quarter of 2017.

Income (loss) before taxes for the Canada segment decreased $4.5 million, or 256.8%, to a loss of $2.7 million for the 
twelve months ended December 31, 2018 compared to income of $1.8 million for the same period of 2017 primarily due to the 
decrease in revenues described above, higher project development costs and unfavorable foreign currency exchange rate 
fluctuations.

Income (loss) before taxes for the Canada segment increased $4.1 million, or 175.2%, to income of $1.8 million for twelve 
months ended December 31, 2017 compared to a loss of $2.3 million for the same period of 2016 primarily due to the decrease 
in project revenues related to the significant low margin project described above, $1.9 million of bad debt expense related to our 
previously disclosed restructuring efforts in Canada recorded during 2016, and favorable foreign currency exchange rate 
fluctuations realized during 2017.

Non-Solar DG

Year Ended December 31,
2017
2018

Dollar
Change

Percentage
Change

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $

82,655

13,412

$

$

79,220

8,115

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $

79,220

8,115

$

$

74,395

9,301

Year Ended December 31,
2016
2017

$

$

$

$

3,435

5,297

4.3 %

65.3 %

Dollar
Change

Percentage
Change

4,825
(1,186)

6.5 %

(12.8)%

Revenues for the Non-solar DG segment increased $3.4 million, or 4.3%, to $82.7 million for the twelve months ended 

December 31, 2018 compared to the same period of 2017 primarily due to an increase in energy and incentive revenue which 
was partially offset by a decrease in project revenue.

Revenues for the Non-solar DG segment increased $4.8 million, or 6.5%, to $79.2 million for twelve months ended 

December 31, 2017  compared to the same period of 2016 primarily due to an increase in project revenues from the 

42development of small-scale plants we are constructing for customers and energy and incentive revenue from renewable gas 
assets the Company owns.

Income before taxes for the Non-solar DG segment increased by $5.3 million, or 65.3%, to $13.4 million for the twelve 

months ended December 31, 2018 compared to the same period of 2017 primarily due to the increase in higher margin energy 
and incentive revenues described above.

Income before taxes for the Non-solar DG segment decreased $1.2 million, or 12.8%, to $8.1 million for the twelve months 

ended December 31, 2017 compared to the same period of 2016 primarily due to the increase in revenues described above 
offset by increased interest expense attributed to an increase in project financing activity in 2017 for assets placed in service.

All Other

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . . $
Unallocated corporate activity . . . . . . . . . . . . . . . . . . $

84,848

$

5,264
$
(30,415) $

74,787

$

2,920
$
(27,195) $

10,061

2,344
(3,220)

13.5 %

80.3 %
(11.8)%

Year Ended December 31,
2017
2018

Dollar
Change

Percentage
Change

Year Ended December 31,
2016
2017

Dollar
Change

Percentage
Change

Revenues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Income (loss) before taxes . . . . . . . . . . . . . . . . . . . . . $
Unallocated corporate activity . . . . . . . . . . . . . . . . . . $

74,787

$

$
2,920
(27,195) $

71,613

$
(427) $
(32,225) $

3,174

3,347

5,030

4.4 %

783.8 %

15.6 %

Revenues from all other segments increased $10.1 million, or 13.5%, to $84.8 million for the twelve months ended 

December 31, 2018 compared to the same period of 2017 primarily due to an increase in project revenues related to the size of 
active projects and integrated-PV revenues attributed to sales to customers for oilfield microgrid applications.

Revenues from all other segments increased $3.2 million, or 4.4%, to $74.8 million for the twelve months ended December 

31, 2017 primarily due to an increase in integrated-PV revenues attributed to sales to customers for oilfield microgrid 
applications, which rebounded in 2017, partially offset by a decrease in revenues from business assets sold during the first 
quarter of 2017.

  Income before taxes from all other segments increased $2.3 million to income of $5.3 million for the twelve months 
ended December 31, 2018 compared to the same period of 2017 primarily due to the increase in revenues described above.

Income (loss) before taxes from all other segments increased $3.3 million to income of $2.9 million for the twelve months 

ended December 31, 2017 compared to a loss of $0.4 million for the same period of 2016 primarily due to to increased 
integrated-PV revenues as described above as well as improved profitability following the sale of business assets described 
above.

Unallocated corporate activity includes all corporate level selling, general and administrative expenses and other expenses 

not allocated to the segments. We do not allocate any indirect expenses to the segments. 

Corporate activity increased by $3.2 million, or 11.8%, to $30.4 million for the twelve months ended December 31, 2018 
compared to the same period of 2017 primarily due to an increase in salary and benefit costs, professional fees and unallocated 
expenses.

Corporate activity decreased from by $5.0 million, or 15.6%, to $27.2 million primarily due to $3.2 million in reserves for 

certain amounts receivable from a customer who declared bankruptcy during 2016.

43Liquidity and Capital Resources

Sources of liquidity.  Since inception, we have funded operations primarily through cash flow from operations, advances 

from Federal ESPC projects and various forms of debt.

The changes in cash and cash equivalents for the years ended December 31, 2018, 2017 and 2016 were as follows:

Cash flows used in operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . $
Cash flows used in investing activities. . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash flows provided by financing activities. . . . . . . . . . . . . . . . . . . . . . .
Effect of exchange rate changes on cash . . . . . . . . . . . . . . . . . . . . . . . . .
Net increase (decrease) in cash and cash equivalents. . . . . . . . . . . . . . . . $

Year Ended December 31,
2017
(135,570) $
(88,042)
230,237

2018

(53,201) $
(133,206)
224,511
(295)
37,809

$

654

7,279

$

2016

(52,634)
(79,616)
134,146
(422)
1,474

We believe that cash and cash equivalents, and availability under our revolving senior secured credit facility, combined 

with our access to credit markets, will be sufficient to fund our operations through at least March 2020 and thereafter. 

Proceeds from our Federal ESPC projects are generally received through agreements to sell the ESPC receivables related to 

certain ESPC contracts to third-party investors. We use the advances from the investors under these agreements to finance the 
projects. We are the primary obligor for financing received, but only until final acceptance of the work by the customer. At this 
point recourse to us ceases and the ESPC receivables are transferred to the investor. The transfers of receivables under these 
agreements do not qualify for sales accounting until final customer acceptance of the work, so the advances from the investors 
are not classified as operating cash flows. Cash draws that we receive under these ESPC agreements, $158.2 million, as of year 
ended December 31, 2018, are recorded as financing cash inflows. The use of the cash received under these arrangements is to 
pay project costs classified as operating cash flows $(155.5) million as of the year ending December 31, 2018. Due to the 
manner in which the ESPC contracts with the third-party investors are structured, our reported operating cash flows are 
materially impacted by the fact that operating cash flows only reflect the ESPC contract expenditure outflows and do not reflect 
any inflows from the corresponding contract revenues. Upon acceptance of the project by the federal customer the ESPC 
receivable and corresponding ESPC liability are removed from our consolidated balance sheet as a non-cash settlement. See 
Note 2, “Summary of Significant Accounting Policies”, to our Consolidated Financial Statements appearing in Item 8 of this 
Annual Report on Form 10-K.

Our service offering also includes the development, construction and operation of small-scale renewable energy plants. 
Small-scale renewable energy projects, or energy assets, can either be developed for the portfolio of assets that we own and 
operate or designed and built for customers. Expenditures related to projects that we own are recorded as cash outflows from 
investing activities. Expenditures related to projects that we build for customers are recorded as cash outflows from operating 
activities as cost of revenues. 

Capital expenditures. Our total capital expenditures were $129.6 million, $88.4 million, and $76.0 million for the twelve 
months ended December 31, 2018, 2017 and 2016, respectively. Additionally, we invested $3.6 million in acquisitions for the 
twelve months ended December 31, 2018, we invested $2.4 million in acquisitions of renewable energy plants, net of debt 
assumed, for the twelve months ended December 31, 2017 and $3.6 million in acquisitions for the twelve months ended 
December 31, 2016. Included in our capital expenditures is the purchase of solar PV projects in development for $72.9 million 
for the twelve months ended December 31, 2018. We currently plan to invest approximately $150.0 million to $200.0 million in 
capital expenditures in 2019, principally for the construction or acquisition of new renewable energy plants.

Cash flows from operating activities. Operating activities used $53.2 million of net cash during 2018. In 2018, we had net 
income of $37.6 million, which is net of non-cash compensation, depreciation, amortization, deferred income taxes and other 
non-cash items totaling $42.1 million. Net increases in project development costs and other assets and net decreases in other 
liabilities used $12.9 million. These uses of cash were offset by net decreases in accounts receivable including retainage, 
inventory, costs and estimated earnings in excess of billings and prepaid expenses and other current assets and an increase in 
accounts payable and accrued expenses, billings in excess of cost and estimated earnings and income taxes payable which 
provided $35.6 million. Federal ESPC receivables used $155.5 million. As described above, Federal ESPC operating cash flows 
only reflect the ESPC expenditure outflows and do not reflect any inflows from the corresponding contract revenues, which are 

44recorded as cash inflows from financing activities due to the timing of the receipt of cash related to the assignment of the ESPC 
receivables to the third-party investors.

Operating activities used $135.6 million of net cash during 2017. In 2017, we had a net income of $33.5 million, which is 

net of non-cash compensation, depreciation, amortization, deferred income taxes and other non-cash items totaling $22.2 
million.  Net increases in costs and estimated earnings in excess of billings, prepaid expenses and other current assets and 
project development costs and decreases in billings in excess of cost and estimated earnings, other liabilities and income taxes 
payable used $60.6 million. These uses of cash were partially offset by a decrease in accounts receivable including retainage, 
inventory and other assets and increase in accounts payable and accrued expenses which provided $26.9 million. Federal ESPC 
receivables used $157.5 million.

Operating activities used $52.6 million of net cash during 2016. In 2016, we had a net income of $12.0 million, which is 

net of non-cash compensation, depreciation, amortization, deferred income taxes and other non-cash items totaling $35.8 
million. Net increases prepaid expenses and other current assets, accounts receivable including retainage and other assets and 
decreases in accounts payable and accrued expenses and other current liabilities, billings in excess of cost and estimated 
earnings and other liabilities used $22.1 million. These uses of cash were partially offset by a decrease in inventory, costs and 
estimated earnings in excess of billings and project development costs and increases in income taxes payable which provided 
$38.4 million. Federal ESPC receivables used $116.8 million.

Cash flows from investing activities. Cash used for investing activities totaled $133.2 million during 2018 and consisted of 

capital investments of $125.7 million related to the development and acquisition of renewable energy plants, $3.9 million 
related to purchases of other property and equipment and acquisitions of businesses of $3.6 million. 

Cash used for investing activities totaled $88.0 million during 2017 and consisted of capital investments of $85.6 million 
related to the development of renewable energy plants, $2.9 million related to purchases of other property and equipment and 
$2.4 million related to acquisitions of renewable energy plants. Offsetting these amounts was $2.8 million in proceeds from the 
sale of assets from a business.

Cash used for investing activities totaled $79.6 million during 2016 and consisted of capital investments of $73.2 million 
related to the development of renewable energy plants, $2.8 million related to purchases of other property and equipment and 
$3.6 million related to acquisitions of renewable energy plants. 

Cash flows from financing activities. Net cash provided by financing activities totaled $224.5 million during 2018 and 
included repayments of $36.4 million on long-term debt, payments of $4.1 million relating to financing fees, $1.8 million for 
the repurchase of stock and payments on our senior secured credit facility of $0.9 million. These uses of financing cash were 
offset by proceeds from long-term debt financing of $88.1 million, proceeds from sale-leaseback financings of $5.1 million, 
proceeds from redeemable non-controlling interest of $4.8 million and proceeds from exercises of options which provided $7.2 
million. Proceeds from Federal ESPC projects and energy assets provided $162.5 million in cash.

Net cash provided by financing activities totaled $230.2 million during 2017 and included repayments of $54.2 million on 
long-term debt, payments of $2.9 million relating to financing fees and $3.4 million for the repurchase of stock. These uses of 
financing cash were offset by proceeds from long-term debt financing of $48.5 million, proceeds from sale-leaseback 
financings of $51.2 million, proceeds from redeemable non-controlling interest of $7.5 million, proceeds from our senior 
secured credit facility of $12.5 million and exercises of options, which provided $2.0 million. Proceeds from Federal ESPC 
projects and energy assets provided $169.0 million in cash.

Net cash provided by financing activities totaled $134.1 million during 2016 and included repayments of $14.0 million on 
long-term debt, payments of $1.9 million relating to financing fees and $6.4 million for the repurchase of stock. These uses of 
financing cash were offset by proceeds from our senior secured credit facility of $3.8 million, exercises of options, which 
provided $1.1 million, proceeds from sale-leaseback financings of $17.0 million, proceeds from long-term debt financing of 
$38.0 million and proceeds from redeemable non-controlling interest of $6.4 million. Proceeds from Federal ESPC projects 
provided $90.0 million in cash.

We currently plan additional financings of $100.0 million to $110.0 million in 2019 to fund the construction or acquisition 

of new renewable energy plants as discussed above.

Senior Secured Credit Facility — Revolver and Term Loan

On June 30, 2015, we entered into a third amended and restated bank credit facility with two banks. The new credit facility 
replaces and extends our existing credit facility, which was scheduled to expire in accordance with its terms on June 30, 2016. 

45The revolving credit and term loan facility mature on June 30, 2020, when all amounts will be due and payable in full. We 
expect to use the new credit facility for our general corporate purposes, including permitted acquisitions, refinancing of existing 
indebtedness and working capital. In July 2016, we entered into an amendment to the third amended and restated bank credit 
facility that amended the requirement of the total funded debt to EBITDA ratio. In November 2016, we entered into an 
additional amendment to the third amended and restated bank credit facility that increased the amount of the term loan under 
the credit facility by approximately $20.0 million to an aggregate of $30.0 million and extended the maturity date of the term 
loan from June 30, 2018 to June 30, 2020. In June 2017, we entered into an additional amendment to the third amended and 
restated bank credit facility that increased the amount available to be drawn on the revolving credit facility from $60.0 million 
to $75.0 million. This amendment also amended the requirement of the total funded debt to EBITDA ratio as described below. 
In June 2018, we entered into an additional amendment to the Third Amended and Restated bank credit facility. The amendment 
added SunTrust Robinson Humphrey, Inc as an additional lender, increased the aggregate amount of the revolving commitments 
from $75,000 to $85,000 through the existing June 30, 2020 end date, increased the term loan from $25,000 to $46,000 to 
reduce the outstanding revolving loan balances by the same amount and, for the period of June 30, 2018 through June 30, 2020, 
increased the Total Funded Debt to EBITDA covenant ratio from a maximum of 2.75 to 3.00.  The total commitment under the 
amended credit facility (revolving credit, term loan and swing line) is $136,000.

The credit facility consists of a $85.0 million revolving credit facility and a $46.0 million term loan. The revolving credit 

facility may be increased by up to an additional $25.0 million at our option if lenders are willing to provide such increased 
commitments, subject to certain conditions. Up to $20.0 million of the revolving credit facility may be borrowed in Canadian 
dollars, Euros and Pounds Sterling. We are the sole borrower under the credit facility. The obligations under the credit facility 
are guaranteed by certain of our direct and indirect wholly owned domestic subsidiaries and are secured by a pledge of all of 
our and such of our subsidiary guarantors’ assets, other than the equity interests of certain subsidiaries and assets held in non-
core subsidiaries (as defined in the agreement). At December 31, 2018 and 2017, $41.5 million and $22.5 million, was 
outstanding under the term loan, respectively. At December 31, 2018 and 2017, $1.7 million and $27.6 million was outstanding 
under the revolving credit facility, respectively.  At December 31, 2018 funds of $72.2 million was available for the revolving 
credit facility.

The interest rate for borrowings under the credit facility is based on, at our option, either (1) a base rate equal to a margin 
of 0.5% or 0.25%, depending on our ratio of Total Funded Debt to EBITDA (each as defined in the agreement), over the highest 
of (a) the federal funds effective rate, plus 0.50% , (b) Bank of America’s prime rate and (c) a rate based on the London 
interbank deposit rate (“LIBOR”) plus 1.50%, or (2) the one-, two- three- or six-month LIBOR plus a margin of 2.00% or 
1.75%, depending on our ratio of Total Funded Debt to EBITDA. A commitment fee of 0.375% is payable quarterly on the 
undrawn portion of the revolving credit facility. At December 31, 2018, the interest rate for borrowings under the revolving 
credit facility was 4.52% and the weighted average interest rate for borrowings under the term loan was 4.72%.

The revolving credit facility does not require amortization of principal. The term loan requires quarterly principal payments 

of $1.5 million, with the balance due at maturity. All borrowings may be paid before maturity in whole or in part at our option 
without penalty or premium, other than reimbursement of any breakage and deployment costs in the case of LIBOR 
borrowings.

The credit facility limits our ability to, among other things: incur additional indebtedness; incur liens or guarantee 

obligations; merge, liquidate or dispose of assets; make acquisitions or other investments; enter into hedging agreements; pay 
dividends and make other distributions and engage in transactions with affiliates, except in the ordinary course of business on 
an arms’ length basis.

Under the credit facility, we may not invest cash or property in, or loan to, our non-core subsidiaries in aggregate amounts 
exceeding 49% of our consolidated stockholders’ equity. In addition, under the credit facility, we and our core subsidiaries must 
maintain the following financial covenants:

a ratio of total funded debt to EBITDA of less than 3.00 to 1.0 as of the end of each fiscal quarter ending June 30,
2018 and thereafter; and

a debt service coverage ratio (as defined in the agreement) of at least 1.5 to 1.0.

•

•

Any failure to comply with the financial or other covenants of the credit facility would not only prevent us from being able 
to borrow additional funds, but would constitute a default, permitting the lenders to, among other things, accelerate the amounts 
outstanding, including all accrued interest and unpaid fees, under the credit facility, to terminate the credit facility, and enforce 
liens against the collateral. 

46The credit facility also includes several other customary events of default, including a change in control, permitting the 

lenders to accelerate the indebtedness, terminate the credit facility, and enforce liens against the collateral.

As of December 31, 2018, we were in compliance with all of the financial and operational covenants in the senior credit 

facility. In addition, we do not consider it likely that we will fail to comply with these covenants for the next twelve months. 

As of December 31, 2018, the Company was not in compliance with certain financial covenant requirements on two of the 
Company’s project financing debt facilities. The Company has received a waiver from one of the financial institutions to waive 
the failure as of December 31, 2018. The Company has not received a waiver from one financial institution in relation to the 
covenant failure on a project financing facility for which $3,978 was outstanding as of December 31, 2018. 

Project Financing

Construction and Term Loans. We have entered into a number of construction and term loan agreements for the purpose of 

constructing and owning certain renewable energy plants. The physical assets and the operating agreements related to the 
renewable energy plants are generally owned by wholly owned, single member “special purpose” subsidiaries of the Company. 
These construction and term loans are structured as project financings made directly to a subsidiary, and upon commercial 
operations and achieving certain milestones in the credit agreement, the related construction loan converts into a term loan. 
While we are required under GAAP to reflect these loans as liabilities on our consolidated balance sheet, they are generally 
non-recourse and not direct obligations of Ameresco, Inc. As of December 31, 2018, we had outstanding $179.9 million in 
aggregate principal amount under these loans with maturities at various dates from 2020 to 2038. Effective interest rates, after 
consideration for our interest rate swap contracts, ranged from 4.38% to 9.89%. As of December 31, 2017, we had outstanding 
$117.8 million in aggregate principal amount under these loans with maturities at various dates from 2017 to 2034. Effective 
interest rates, after consideration for our interest rate swap contracts, ranged from 3.4% to 7.3% as of December 31, 2017. 

The Company’s project financing facilities contain various financial and other covenant requirements which include debt 

service coverage ratios and total funded debt to EBITDA, as defined. Any failure to comply with the financial or other 
covenants of the Company’s projects financings would result in inability to distribute funds to from the wholly-owned 
subsidiary to the Company or constitute an event of default in which the lenders may have the ability to accelerate the amounts 
outstanding, including all accrued interest and unpaid fees. 

47As of December 31, 2018 and 2017, the Company’s debt consisted of the following:

Commencement Date

Maturity Date

February 2021

December 2024
March 2021
June 2028

June 2024

June 2020

June 2020

Senior secured credit facility, interest at
varying rates monthly in arrears . . . . . . . . . . . June 2015
Variable rate term loan payable in semi-
annual installments . . . . . . . . . . . . . . . . . . . . . January 2006
Variable rate term loan payable in semi-
annual installments . . . . . . . . . . . . . . . . . . . . . January 2006
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . . February 2009
Term loan payable in quarterly installments . . March 2011
Term loan payable in monthly installments . . October 2011
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . . October 2012
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . . September 2015 March 2023
Term loan payable in quarterly installments . . August 2016
Term loan payable in quarterly installments . . March 2017
Term loan payable in monthly installments(3) . April 2017
Term loan payable in quarterly installments . . April 2017
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . . June 2017
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . . February 2018
Term loan payable in quarterly installments . . June 2018
Variable rate term loan payable in semi-
annual installments . . . . . . . . . . . . . . . . . . . . . June 2018
Variable rate construction loan payable . . . . . November 2016
Variable rate term loan payable in monthly/
quarterly installments . . . . . . . . . . . . . . . . . . . October 2018
Total construction and term loans . . . . . . . . . .

June 2033

June 2018

July 2031
March 2028
April 2027
February 2034

August 2022
December 2038

December 2027

October 2029

Balance as of December 31,

2018

2017

$

43,074

$

49,986

936

7,426

—
1,464
3,843

1,220

8,295

8,757
2,218
4,551

30,674

32,711

17,208
3,925
3,945
22,081
2,735

18,346
4,605
4,258
13,325
3,128

12,915

14,034

21,475
30,069

9,668

—

—
—

—

1,721

9,072
$ 220,510

—
$ 167,155

Federal ESPC liabilities. We have arrangements with certain third-parties to provide advances to us during the construction 

or installation of projects for certain customers, typically federal governmental entities, in exchange for our assignment to the 
lenders of our rights to the long-term receivables arising from the ESPCs related to such projects. These financings totaled 
$288.0 million and $235.1 million in principal amounts at December 31, 2018 and 2017, respectively. Under the terms of these 
financing arrangements, we are required to complete the construction or installation of the project in accordance with the 
contract with our customer, and the liability remains on our consolidated balance sheet until the completed project is accepted 
by the customer.

Sale-Leaseback. During the first quarter of 2015, we entered into an agreement with an investor which gives us the option 
to sell and contemporaneously lease back solar PV projects. In September 2016, we amended our agreement with the investor 
whereas the investor had committed up to a maximum combined funding amount of $100.0 million through June 30, 2017 on 
certain projects. In May 2017, we amended our agreement with the investor to extend the end date of the agreement to June 30, 
2018. This agreement was not extended further and expired on June 30, 2018.  During the year ended December 31, 2017, we 
sold twelve solar PV projects and in return received $47.2 million as part of this arrangement. Additionally, we sold and 
contemporaneously leased back one solar PV project to a separate investor, not a party to the master lease agreement, under a 
new agreement during the year ended December 31, 2017, and in return received $2.0 million. During the third quarter of 2018, 
we entered into an agreement with an investor which gives us the option to sell and contemporaneously lease back solar 
photovoltaic (“solar PV”) projects through August 2019 up to a maximum funding amount of 100.0 million. As of December 

4831, 2018, $95.1 million remained available under the lending commitment although this amount is not expected to be used. 
During the year ended December 31, 2018, we sold two solar PV projects and in return received $4.9 million as part of this 
arrangement. While we are required under GAAP to reflect these lease payments as liabilities on our consolidated balance 
sheet, they are generally non-recourse and not direct obligations of Ameresco, Inc., except that Ameresco, Inc. has guaranteed 
certain obligations relating to taxes and project warranties, operation and maintenance.

Contractual Obligations

The following table summarizes our significant contractual obligations and commitments as of December 31, 2018 (in 

thousands):

Less than
One Year

Payments due by Period
One to
Three Years

Three to
Five Years

More than
Five Years

Total

Senior Secured Credit Facility:

Revolver . . . . . . . . . . . . . . . . . . . . . . . . . .
Term Loan . . . . . . . . . . . . . . . . . . . . . . . . .

$

1,696

$

— $

1,696

$

41,500

6,000

35,500

— $

—

—

—

Project Financing:

Construction and term loans . . . . . . . . . . .
Federal ESPC liabilities(1) . . . . . . . . . . . .
Interest obligations(2). . . . . . . . . . . . . . . . . . . .
Capital lease liabilities . . . . . . . . . . . . . . . . . . .
Operating leases . . . . . . . . . . . . . . . . . . . . . . . .
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

179,872

288,047

71,750

33,364

47,593

15,932

—

14,349

4,959

7,917

82,568

288,047

20,339

12,304

13,097

36,754

—

12,389

3,045

9,230

$

663,822

$

49,157

$

453,551

$

61,418

$

44,618

—

24,673

13,056

17,349

99,696

(1)

Federal ESPC arrangements relate to the installation and construction of projects for certain customers, typically
federal governmental entities, where we assign to third-parties our right to customer receivables. We are relieved of
the liability, without making a payment, when the project is completed and accepted by the customer. We typically
expect to be relieved of the liability between one and three years from the date of project construction
commencement. The table does not include, for our Federal ESPC liability arrangements, the difference between the
aggregate amount of the long-term customer receivables sold by us to the third-party and the amount received by us
from the third party for such sale.

(2)

For both the revolving and term loan portions of our senior secured credit facility, the table above assumes that the
variable interest rate in effect at December 31, 2018 remains constant for the term of the facility.

Off-Balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined 

under SEC rules, such as relationships with unconsolidated entities or financial partnerships, which are often referred to as 
structured finance or special purpose entities, established for the purpose of facilitating financing transactions that are not 
required to be reflected on our balance sheet.  The Company from time to time issues letters of credit and performance bonds, 
with their third-party lenders, to provide collateral.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

We are exposed to changes in interest rates and foreign currency exchange rates because we finance certain operations 
through fixed and variable rate debt instruments and denominate our transactions in U.S. and Canadian dollars and British 
pounds sterling (“GBP”). Changes in these rates may have an impact on future cash flows and earnings. We manage these risks 
through normal operating and financing activities and, when deemed appropriate, through the use of derivative financial 
instruments.

Interest Rate Risk

           We had cash and cash equivalents totaling $61.4 million as of December 31, 2018 and $24.3 million as of December 31, 
2017. Our exposure to interest rate risk primarily relates to the interest expense paid on our senior secured credit facility.

49Derivative Instruments

We do not enter into financial instruments for trading or speculative purposes. However, through our subsidiaries we do 

enter into derivative instruments for purposes other than trading purposes. Certain of the term loans that we use to finance our 
renewable energy projects bear variable interest rates that are indexed to short-term market rates. We have entered into interest 
rate swaps in connection with these term loans in order to seek to hedge our exposure to adverse changes in the applicable 
short-term market rate. In some instances, the conditions of our renewable energy project term loans require us to enter into 
interest rate swap agreements in order to mitigate our exposure to adverse movements in market interest rates. All but one of 
the interest rate swaps that we have entered into qualify and have been designated as fair value hedges. We have also entered 
into three commodity swap contracts in order to hedge our exposure to adverse changes in the short-term market rates of 
natural gas, which have not been designated for hedge accounting. See Notes 2, 17 and 18 of “Notes to Consolidated Financial 
Statements” included in Item 8 of this Annual Report on Form 10-K. 

We have also entered into term loan agreements that contain interest make-whole provisions that qualify as embedded 
derivatives that are required to be bifurcated from their host term loan agreement and valued separately. These derivatives 
cannot be hedged. See Notes 2, 8, 17 and 18 of “Notes to Consolidated Financial Statements” included in Item 8 of this Annual 
Report on Form 10-K.

By using derivative instruments, we are subject to credit and market risk. The fair market value of the interest rate and 

commodity swaps are determined by using valuation models whose inputs are derived using market observable inputs, 
including interest rate yield curves, and reflects the asset or liability position as of the end of each reporting period. When the 
fair value of a derivative contract is positive, the counterparty owes us, thus creating a receivable risk for us. We are exposed to 
counterparty credit risk in the event of non-performance by counterparties to our derivative agreements. We minimize 
counterparty credit (or repayment) risk by entering into transactions with major financial institutions of investment grade credit 
rating. The fair value of these make-whole provisions was determined based on available market data and a with and without 
model. 

Our exposure to market interest rate risk is not hedged in a manner that completely eliminates the effects of changing 

market conditions on earnings or cash flow.

Foreign Currency Risk

We have revenues, expenses, assets and liabilities that are denominated in foreign currencies, principally the Canadian 

dollar and British pound sterling. Also, a significant number of employees are located in Canada and the U.K., and our 
subsidiaries in those countries transact business in those respective currencies. As a result, we have designated the Canadian 
dollar as the functional currency for Canadian operations. Similarly, the GBP has been designated as the functional currency for 
our operations in the U.K. When we consolidate the operations of these foreign subsidiaries into our financial results, because 
we report our results in U.S. dollars, we are required to translate the financial results and position of our foreign subsidiaries 
from their respective functional currencies into U.S. dollars. We translate the revenues, expenses, gains, and losses from our 
Canadian and U.K. subsidiaries into U.S. dollars using a weighted average exchange rate for the applicable fiscal period. We 
translate the assets and liabilities of our Canadian and U.K. subsidiaries into U.S. dollars at the exchange rate in effect at the 
applicable balance sheet date. Translation adjustments are not included in determining net income for the period but are 
disclosed and accumulated in a separate component of consolidated equity until sale or until a complete or substantially 
complete liquidation of the net investment in our foreign subsidiary takes place. Changes in the values of these items from one 
period to the next which result from exchange rate fluctuations are recorded in our consolidated statements of changes in 
stockholders’ equity as accumulated other comprehensive loss. For the year ended December 31, 2018, due to the weakening of 
the GBP versus the U.S. dollar, our foreign currency translation resulted in a loss of $0.3 million which we recorded as a 
increase in accumulated other comprehensive income. For the year ended December 31, 2017, due to the strengthening of the 
Canadian dollar versus the U.S. dollar, our foreign currency translation resulted in a gain of $0.7 million, which we recorded as 
a decrease in accumulated other comprehensive loss. As a consequence, gross profit, operating results, profitability and cash 
flows are impacted by relative changes in the value of the Canadian dollar and GBP. We have not repatriated earnings from our 
foreign subsidiaries, but have elected to invest in new business opportunities there. See Note 9, “Income Taxes” to our 
consolidated financial statements appearing in Item 8 of this Annual Report on Form 10-K. We do not hedge our exposure to 
foreign currency exchange risk.

50Item 8.  Financial Statements and Supplementary Data 

AMERESCO, INC.
CONSOLIDATED BALANCE SHEETS
(in thousands, except share amounts)

December 31,

2018

2017

ASSETS
Current assets:

Cash and cash equivalents (including amounts in VIEs of $1,255 and $444, respectively) . . $
Restricted cash (including amounts in VIEs of $156 and $155, respectively). . . . . . . . . . . . .
Accounts receivable, net (including amounts in VIEs of $374 and $328, respectively) . . . . .
Accounts receivable retainage, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Costs and estimated earnings in excess of billings (including amounts in VIEs of $498 and
$360, respectively) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventory, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets (including amounts in VIEs of $190 and $8,
respectively) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax receivable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Project development costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total current assets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Federal ESPC receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy assets, net (including amounts in VIEs of $122,641 and $55,712, respectively). . . . . .
Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intangible assets, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets (including amounts in VIEs of $1,613 and $1,398, respectively) . . . . . . . . . . . . .

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

61,397

$

16,880

85,985
13,516

86,842
7,765

11,571
5,296
21,717
310,969
293,998
6,985
459,952
58,332
2,004
29,394
1,161,634

$

LIABILITIES, REDEEMABLE NON-CONTROLLING INTERESTS AND STOCKHOLDERS’ EQUITY

Current liabilities:

Current portions of long-term debt and capital lease liabilities (including amounts in VIEs
of $1,712 and $0, respectively) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accounts payable (including amounts in VIEs of $234 and $764, respectively) . . . . . . . . . .
Accrued expenses and other current liabilities (including amounts in VIEs of $4,233 and
$149, respectively) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Billings in excess of cost and estimated earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total current liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Long-term debt and capital lease liabilities, less current portions and net of deferred
financing fees (including amounts in VIEs of $26,461 and $0, respectively) . . . . . . . . . . . . . .
Federal ESPC liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred grant income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other liabilities (including amounts in VIEs of $2,131 and $0, respectively) . . . . . . . . . . . . . .
Commitments and contingencies (Note 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redeemable non-controlling interests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26,890

$

134,330

35,947

24,363

1,100
222,630

219,162

288,047

4,352

6,637

29,212

The accompanying notes are an integral part of these consolidated financial statements.

24,262

15,751

85,121
17,484

104,852
8,139

14,037
6,053
11,379
287,078
248,917
5,303
356,443
56,135
2,440
27,635
983,951

22,375

135,881

23,260

19,871

755
202,142

173,237

235,088

584

7,188

18,754

14,719

10,338

51AMERESCO, INC.
CONSOLIDATED BALANCE SHEETS — (Continued)

(in thousands, except share amounts)

December 31,

2018

2017

Stockholders’ equity:

Preferred stock, $0.0001 par value, 5,000,000 shares authorized, no shares issued and
outstanding at December 31, 2018 and 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Class A common stock, $0.0001 par value, 500,000,000 shares authorized, 30,366,546
shares issued and 28,275,506 shares outstanding at December 31, 2018, 29,406,315
shares issued and 27,533,049 shares outstanding at December 31, 2017 . . . . . . . . . . . . . .
Class B common stock, $0.0001 par value, 144,000,000 shares authorized, 18,000,000
shares issued and outstanding at December 31, 2018 and 2017 . . . . . . . . . . . . . . . . . . . . .
Additional paid-in capital. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive loss, net of income taxes . . . . . . . . . . . . . . . . . . . . . . .
Less - treasury stock, at cost, 2,091,040 shares at December 31, 2018, and 1,873,266
shares at December 31, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities, redeemable non-controlling interests and stockholders’ equity. . . . . $

— $

3

2
124,651
269,806
(5,949)

(11,638)
376,875
1,161,634

$

—

3

2
116,196
235,844
(5,626)

(9,799)
336,620
983,951

The accompanying notes are an integral part of these consolidated financial statements.

52AMERESCO, INC.
CONSOLIDATED STATEMENTS OF INCOME (LOSS)
(in thousands, except per share amounts)

2018

Year Ended December 31,
2017

2016

Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Cost of revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross profit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selling, general and administrative expenses. . . . . . . . . . . . . . . . . . . . . .
Operating income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other expenses, net (Note 16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income before (benefit) provision for income taxes. . . . . . . . . . . . . . .
Income tax (benefit) provision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net loss attributable to redeemable non-controlling interest . . . . . . . . . .
Net income attributable to common shareholders . . . . . . . . . . . . . . . . . . $
Net income per share attributable to common shareholders: . . . . . . . . . .

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Weighted average common shares outstanding:

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

$
$

787,138
613,526
173,612
114,513
59,099
16,709
42,390
4,813
37,577
407
37,984

0.83
0.81

45,729
46,831

$

$

$
$

717,152
572,994
144,158
107,570
36,588
7,871
28,717
(4,791)
33,508
3,983
37,491

0.82
0.82

45,509
45,748

651,227
516,883
134,344
110,568
23,776
7,409
16,367
4,370
11,997
35
12,032

0.26
0.26

46,409
46,493

The accompanying notes are an integral part of these consolidated financial statements.

53AMERESCO, INC.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(in thousands)

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Other comprehensive income (loss):

Unrealized (loss) gain from interest rate hedges, net of tax effect of
$(12), $(35) and $(52), respectively . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign currency translation adjustment . . . . . . . . . . . . . . . . . . . . . . .
Total other comprehensive income (loss). . . . . . . . . . . . . . . . . . . . . . . . .
Comprehensive income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comprehensive loss attributable to redeemable non-controlling interest
Comprehensive income attributable to common shareholders . . . . . . . . $

Year Ended December 31,

2018

2017

2016

37,577

$

33,508

$

11,997

(73)
(250)
(323)
37,254
407
37,661

$

310
655
965
34,473
3,983
38,456

$

506
(1,869)
(1,363)
10,634
35
10,669

The accompanying notes are an integral part of these consolidated financial statements.

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55 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
AMERESCO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)

Cash flows from operating activities:

Net income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

37,577

33,508

$

11,997

2018

Year Ended December 31,
2017

2016

Adjustments to reconcile net income to net cash flows from operating
activities:

Depreciation of energy assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation of property and equipment. . . . . . . . . . . . . . . . . . . . . . . .
Amortization of deferred financing fees . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of intangible assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for bad debts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss (gain) on disposal / sale of assets . . . . . . . . . . . . . . . . . . . . . . . . .
Net gain from derivatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation expense . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Excess tax benefits from stock-based compensation arrangements . . .
Unrealized foreign exchange loss (gain) . . . . . . . . . . . . . . . . . . . . . . . .

Changes in operating assets and liabilities:

Accounts receivable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable retainage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Federal ESPC receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inventory, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Costs and estimated earnings in excess of billings . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets. . . . . . . . . . . . . . . . . . . . . . .
Project development costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable, accrued expenses and other current liabilities . . . .
Billings in excess of cost and estimated earnings . . . . . . . . . . . . . . . . .
Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income taxes payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash flows from operating activities . . . . . . . . . . . . . . . . . . . . . . . .

Cash flows from investing activities:

27,305
2,167
2,193
1,057
610
298
(121)
1,258
5,517
—
1,816

9,772
3,774
(155,539)
373
8,015
6,763
(8,659)
(3,499)
2,938
2,866
(783)
1,101
(53,201)

21,648
2,394
1,620
1,451
77
(103)
(271)
1,293
(4,527)
—
(1,406)

1,870
1,279
(157,538)
3,966
(46,730)
(2,471)
(3,007)
111
19,652
(2,168)
(540)
(5,678)
(135,570)

Purchases of property and equipment . . . . . . . . . . . . . . . . . . . . . . . . . .
Purchases of energy assets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from sale of assets of a business

Acquisitions, net of cash received . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cash flows from investing activities. . . . . . . . . . . . . . . . . . . . . . . . . $

(3,943)
(125,673)
—
(3,590)
(133,206) $

(2,851)
(85,559)
2,777
(2,409)
(88,042) $

The accompanying notes are an integral part of these consolidated financial statements.

19,377
3,020
1,503
2,358
5,392
—
(279)
1,462
2,867
(99)
167

(12,002)
3,875
(116,753)
1,118
31,170
(98)
4,162
(509)
(2,798)
(6,974)
(3,578)
1,988
(52,634)

(2,807)
(73,234)
—
(3,575)
(79,616)

56AMERESCO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS — (Continued)
(in thousands)

Cash flows from financing activities:

Excess tax benefits from stock-based compensation arrangements . . . $
Payments of financing fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from exercises of options and ESPP . . . . . . . . . . . . . . . . . . .
Repurchase of common stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds (payments) from senior secured credit facility, net . . . . . . . .
Proceeds from long-term debt financings . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from Federal ESPC projects. . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds for energy assets from Federal ESPC. . . . . . . . . . . . . . . . . . .
Proceeds from sale-leaseback financings . . . . . . . . . . . . . . . . . . . . . . .
Contributions from redeemable non-controlling interests, net . . . . . . .
Payments on long-term debt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash flows from financing activities . . . . . . . . . . . . . . . . . . . . . . . .
Effect of exchange rate changes on cash . . . . . . . . . . . . . . . . . . . . . . . . .
Net increase in cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . .
Cash, cash equivalents, and restricted cash, beginning of year . . . . . . . .
Cash, cash equivalents, and restricted cash, end of year . . . . . . . . . . . . . $
Supplemental disclosures of cash flow information:

Cash paid for interest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Cash paid for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Non-cash Federal ESPC settlement. . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accrued purchases of energy assets . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Conversion of revolver to term loan . . . . . . . . . . . . . . . . . . . . . . . . . . . $

2018

Year Ended December 31,
2017

2016

— $

— $

(4,073)
7,197
(1,839)
(900)
88,115
158,237
4,236

5,145
4,788
(36,395)
224,511
(295)
37,809
60,105
97,914

15,563
2,257
101,557
15,005
25,000

$

$
$
$
$
$

(2,877)
1,977
(3,412)
12,547
48,483
165,013
3,993

51,204
7,473
(54,164)
230,237
654
7,279
52,826
60,105

$

11,675
5,782
66,921
7,335

$
$
$
$
— $

99
(1,908)
1,054
(6,387)
3,822
38,004
90,039
—

17,045
6,392
(14,014)
134,146
(422)
1,474
51,352
52,826

7,220
3,475
79,075
19,506
—

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated 
balance sheets to the total of the same such amounts shown above:

Cash and cash equivalents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-term restricted cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term restricted cash included in other assets . . . . . . . . . . . . . .

  $

$

61,397
16,880
19,637

$

24,262
15,751
20,092

20,607
12,299
19,920

Total cash and cash equivalents, and restricted cash. . . . . . . . . . . . .

  $

97,914

$

60,105

$

52,826

Year Ended December 31,

2018

2017

2016

The accompanying notes are an integral part of these consolidated financial statements.

57AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(in thousands, except per share amounts)

1. DESCRIPTION OF BUSINESS

Ameresco, Inc. (including its subsidiaries, the “Company”) was organized as a Delaware corporation on April 25, 2000.

The Company is a provider of energy efficiency solutions for facilities throughout North America and Europe. The Company 
provides solutions, both services and products, that enable customers to reduce their energy consumption, lower their operating 
and maintenance costs and realize environmental benefits. The Company’s comprehensive set of solutions includes upgrades to 
a facility’s energy infrastructure and the construction and operation of small-scale renewable energy plants. It also sells certain 
photovoltaic (“PV”) equipment worldwide. The Company operates in the United States, Canada and Europe. 

The Company is compensated through a variety of methods, including: 1) direct payments based on fee-for-services 
contracts (utilizing lump-sum or cost-plus pricing methodologies); 2) the sale of energy from the Company’s energy assets; and 
3) direct payment for PV equipment and systems.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company, its subsidiaries in which the 

Company has a controlling financial interest and four investment funds formed to fund the purchase and operation of solar 
energy systems, which are consolidated with the Company as variable interest entities (“VIE”). The Company uses a qualitative 
approach in assessing the consolidation requirement for VIEs. This approach focuses on determining whether the Company has 
the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether the 
Company has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. For 
all periods presented, the Company has determined that it is the primary beneficiary in all of its operational VIEs. The 
Company evaluates its relationships with the VIEs on an ongoing basis to ensure that it continues to be the primary beneficiary. 
All significant intercompany accounts and transactions have been eliminated. Gains and losses from the translation of all 
foreign currency financial statements are recorded in accumulated other comprehensive loss, net, within stockholders’ equity. 
The Company prepares its consolidated financial statements in conformity with GAAP.

Use of Estimates 

GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the 

disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of 
revenue and expenses during the reporting period. The most significant estimates and assumptions used in these consolidated 
financial statements relate to management’s estimates of final construction contract profit in accordance with accounting for 
long-term contracts, allowance for doubtful accounts, inventory reserves, realization of project development costs, fair value of 
derivative financial instruments, accounting for business acquisitions, stock-based awards, impairment of goodwill and long-
lived assets, asset retirement obligations (“AROs”), income taxes, self insurance reserves and potential liability in conjunction 
with certain commitments and contingencies. Actual results could differ from those estimates.

The Company is self-insured for employee health insurance. The maximum exposure in fiscal year 2018 under the plan 
was $100 per covered participant, after which reinsurance takes effect. The liability for unpaid claims and associated expenses, 
including incurred but not reported claims, is determined by management and reflected in the Company’s consolidated balance 
sheets in accrued expenses and other current liabilities. The liability is calculated based on historical data, which considers both 
the frequency and settlement amount of claims. The Company’s estimated accrual for this liability could be different than its 
ultimate obligation if variables such as the frequency or amount of future claims differ significantly from management’s 
assumptions. 5

Cash and Cash Equivalents 

Cash and cash equivalents includes cash on deposit, overnight repurchase agreements and amounts invested in highly 
liquid money market funds. Cash equivalents consist of short term investments with original maturities of three months or less. 
The Company maintains accounts with financial institutions and the balances in such accounts, at times, exceed federally 
insured limits. This credit risk is divided among a number of financial institutions that management believes to be of high 
quality. The carrying amount of cash and cash equivalents approximates its fair value measured using level 1 inputs per the fair 
value hierarchy as defined in Note 17.  

58AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Restricted Cash 

Restricted cash consists of cash and cash equivalents held in an escrow account in association with construction draws for 
energy savings performance contracts (“ESPC”), construction of energy assets, operations and maintenance (“O&M”) reserve 
accounts, cash collateralized letters of credit as well as cash required under term loans to be maintained in debt service reserve 
accounts until all obligations have been indefeasibly paid in full. These accounts are primarily invested in highly liquid money 
market funds. The carrying amount of the cash and cash equivalents in these accounts approximates its fair value measured 
using level 1 inputs per the fair value hierarchy as defined in Note 17. Restricted cash also includes funds held for clients, 
which represent assets that, based upon the Company’s intent, are restricted for use solely for the purposes of satisfying the 
obligations to remit funds to third parties, primarily utility service providers, relating to the Company’s enterprise energy 
management services. As of December 31, 2018 and 2017, the Company classified the non-current portion of restricted cash of 
$19,637 and $20,092, respectively, in other assets on its consolidated balance sheets.

Accounts Receivable 

Accounts receivable are stated at the amount management expects to collect from outstanding balances. An allowance for 

doubtful accounts is provided for those accounts receivable considered to be uncollectible based upon historical experience and 
management’s evaluation of outstanding accounts receivable. Bad debts are written off against the allowance when identified. 

Changes in the allowance for doubtful accounts are as follows:

Year Ended December 31,

2018

2017

2016

Allowance for doubtful accounts, beginning of period . . . . . . . . . . . . . . $
Charges to costs and expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Account write-offs and other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowance for doubtful accounts, end of period . . . . . . . . . . . . . . . . . . . $

3,315
610
(1,160)
2,765

$

$

7,836
81
(4,602)
3,315

$

$

3,729
4,332
(225)
7,836

During the year ended ended December 31, 2016, the Company reserved for certain assets related to a customer who 
declared bankruptcy. Of this amount, $2,394 was recorded as an allowance for doubtful accounts in accounts receivable, net. In 
addition, the Company recorded a $476 charge to write-off costs and estimated earnings in excess of billings and a $325 charge 
for project costs incurred during the first quarter of 2016. During 2017 a settlement was reached with the customer who 
declared bankruptcy, and the Company has no additional exposure for the remaining receivables. During the year ended 
December 31, 2016, the Company also reserved for certain assets in its Canada segment totaling $1,934 due to collectability 
concerns as a result of its previously disclosed restructuring efforts. This reserve included $1,655 for doubtful accounts in 
accounts receivable, net and $279 reserved against accounts receivable retainage, net.

Accounts Receivable Retainage 

Accounts receivable retainage represents amounts due from customers, but where payments are withheld contractually 

until certain construction milestones are met. Amounts retained typically range from 5% to 10% of the total invoice. The 
Company classifies as a current asset those retainages that are expected to be billed in the next twelve months. For the year 
ended December 31, 2016, the Company recorded a reserve of $279 against the remaining accounts receivable retainage, net 
balance. As of December 31, 2018 and December 31, 2017, no amounts were determined to be uncollectible.

 Inventory 

Inventories, which consist primarily of PV solar panels, batteries and related accessories, are stated at the lower of cost 

(“first-in, first-out” method) or net realizable value (determined as the estimated selling prices in the ordinary course of 
business, less reasonably predictable costs of completion, disposal, and transportation). Provisions have been made to reduce 
the carrying value of inventory to the net realizable value.

Prepaid Expenses 

Prepaid expenses consist primarily of short-term prepaid expenditures that will amortize within one year.

Federal ESPC Receivable 

       Federal ESPC receivable represents the amount to be paid by various federal government agencies for work performed and 
earned by the Company under specific ESPCs. The Company assigns certain of its rights to receive those payments to third-

59AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

parties that provide construction and permanent financing for such contracts. Upon completion and acceptance of the project by 
the government, typically within 24 to 36 months of construction commencement, the assigned ESPC receivable from the 
government and corresponding ESPC liability are eliminated from the Company’s consolidated financial statements.  

Project Development Costs 

The Company capitalizes as project development costs only those costs incurred in connection with the development of 

energy projects, primarily direct labor, interest costs, outside contractor services, consulting fees, legal fees and travel, if 
incurred after a point in time where the realization of related revenue becomes probable. Project development costs incurred 
prior to the probable realization of revenue are expensed as incurred. The Company classifies as a current asset those project 
development efforts that are expected to proceed to construction activity in the twelve months that follow. The Company 
periodically reviews these balances and writes off any amounts where the realization of the related revenue is no longer 
probable.  Project development costs of $639 and $2,355 were included in other long-term assets as of December 31, 2018 and 
2017, respectively.

Property and Equipment 

Property and equipment consists primarily of office and computer equipment, and is recorded at cost. Major additions and 

improvements are capitalized as additions to the property and equipment accounts, while replacements, maintenance and repairs 
that do not improve or extend the life of the respective assets, are expensed as incurred. Depreciation and amortization of 
property and equipment are computed on a straight-line basis over the following estimated useful lives:

Asset Classification
Furniture and office equipment . . . . . . . . . . . . . . . . . . . . . . . . Five years
Computer equipment and software costs. . . . . . . . . . . . . . . . . Three to five years
Leasehold improvements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lesser of term of lease or five years
Automobiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Five years
Land. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unlimited

Estimated Useful Life

Gains or losses on disposal of property and equipment are reflected in selling, general and administrative expenses in the 

consolidated statements of income (loss).

Energy Assets 

Energy assets consist of costs of materials, direct labor, interest costs, outside contract services, deposits and project 

development costs incurred in connection with the construction of small-scale renewable energy plants that the Company owns. 
These amounts are capitalized and amortized to cost of revenues in the Company’s consolidated statements of income (loss) on 
a straight line basis over the lives of the related assets or the terms of the related contracts.

The Company capitalizes interest costs relating to construction financing during the period of construction. Capitalized 
interest is included in energy assets, net, in the Company’s consolidated balance sheets. Capitalized interest is amortized to cost 
of revenues in the Company’s consolidated statements of income (loss) on a straight line basis over the useful life of the 
associated energy asset. The amount of interest capitalized for the years ended December 31, 2018, 2017 and 2016 was $3,817, 
$4,256 and $1,253, respectively. 

Routine maintenance costs are expensed in the current year’s consolidated statements of income (loss) to the extent that 
they do not extend the life of the asset. Major maintenance, upgrades and overhauls are required for certain components of the 
Company’s assets. In these instances, the costs associated with these upgrades are capitalized and are depreciated over the 
shorter of the remaining life of the asset or the period until the next required major maintenance or overhaul. 

Included in energy assets are capital lease assets and accumulated depreciation of capital lease assets. For additional 

information see the Sale-Leaseback section below and Note 7.

The Company evaluates its long-lived assets for impairment as events or changes in circumstances indicate the carrying 

value of these assets may not be fully recoverable. Examples of such triggering events applicable to the Company’s assets 
include a significant decrease in the market price of a long-lived asset or asset group or a current-period operating or cash flow 
loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses 
associated with the use of a long-lived asset or asset group.

60AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

The Company evaluates recoverability of long-lived assets to be held and used by estimating the undiscounted future cash 

flows before interest associated with the expected uses and eventual disposition of those assets. When these comparisons 
indicate that the carrying value of those assets is greater than the undiscounted cash flows, the Company recognizes an 
impairment loss for the amount that the carrying value exceeds the fair value.

From time to time, the Company has applied for and received cash grant awards from the U.S. Treasury Department (the 
“Treasury”) under Section 1603 of the American Recovery and Reinvestment Act of 2009 (the “Act”).  The Act authorized the 
Treasury to make payments to eligible persons who place in service qualifying renewable energy projects.  The grants are paid 
in lieu of investment tax credits.  All of the cash proceeds from the grants were used and recorded as a reduction in the cost 
basis of the applicable energy assets.  If the Company disposes of the property, or the property ceases to qualify as specified 
energy property, within five years from the date the property is placed in service, then a prorated portion of the Section 1603 
payment must be repaid.

The Company last received a Section 1603 grant during the year ended December 31, 2014. No further Section 1603 grant 

payments are expected to be received as the program has expired.

For tax purposes, the Section 1603 payments are not included in federal and certain state taxable income and the basis of 

the property is reduced by 50% of the payment received. Deferred grant income of $6,637 and $7,188 in the accompanying 
consolidated balance sheets at December 31, 2018 and 2017, respectively, represents the benefit of the basis difference to be 
amortized to income tax expense over the life of the related property.

The Company has historically received cash rebates from utility companies, which were accounted for as reductions in the 

book value of the related energy assets. The rebates were one-time payments based on the cost and efficiency of the installed 
units, and are earned upon installation and inspection by the utility. The payments are not related to, or subject to adjustment 
based on, future operating performance. The rebates were payable from the utility to the Company and are applied against the 
cost of construction, thereby reducing the book value of the corresponding energy assets and have been treated as an investing 
activity in the accompanying consolidated statements of cash flows. No rebates were received during the years ended 
December 31, 2018, 2017 and 2016.

Deferred Financing Fees

Deferred financing fees relate to the external costs incurred to obtain financing for the Company. Deferred financing fees 
are amortized over the respective term of the financing using the effective interest method, with the exception of the Company’s 
revolving credit facility and construction loans, as discussed in Note 8, for which deferred financing fees are amortized on a 
straight-line basis over the term of the agreement. Deferred financing fees are presented on the consolidated balance sheets as a 
reduction to long-term debt and capital lease liabilities.

Goodwill and Intangible Assets

The Company has classified as goodwill the amounts paid in excess of fair value of the net assets (including tax attributes) 
of companies acquired in purchase transactions. The Company has recorded intangible assets related to customer contracts, customer 
relationships, non-compete agreements, trade names and technology, each with defined useful lives. The Company assesses the 
impairment of goodwill and intangible assets that have indefinite lives on an annual basis (December 31st) and whenever events 
or changes in circumstances indicate that the carrying value of the asset may not be recoverable. 

Goodwill is reviewed for impairment annually and whenever events or changes in circumstances indicate that the carrying 

value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill requires significant 
judgment. The Company regularly monitors current business conditions and other factors including, but not limited to, adverse 
industry or economic trends, restructuring actions and projections of future results.  The Company estimates the reporting units 
fair value and compares it with the carrying value of the reporting unit, including goodwill. If the fair value is greater than the 
carrying value of its reporting unit, no impairment is recorded.  Fair value is determined using both an income approach and a 
market approach. The estimates and assumptions used in the Company’s calculations include revenue growth rates, expense 
growth rates, expected capital expenditures to determine projected cash flows, expected tax rates and an estimated discount rate 
to determine present value of expected cash flows. These estimates are based on historical experiences, the Company’s 
projections of future operating activity and its weighted-average cost of capital.  If the fair value is less than the carrying value, 
an impairment loss is recognized for the amount that the carrying amount of a reporting unit, including goodwill, exceeds its 
fair value, limited to the total amount of goodwill allocated to that reporting unit. The impairment charge would be recorded to 

61AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

earnings in the consolidated statements of income (loss).  Judgment is required in determining whether an event has occurred 
that may impair the value of goodwill or identifiable intangible assets. 

Acquired intangible assets other than goodwill that are subject to amortization include customer contracts and customer 
relationships, as well as software/technology, trade names and non-compete agreements.  The intangible assets are amortized 
over periods ranging from one to fifteen years from their respective acquisition dates. The Company evaluates its intangible 
assets for impairment consistent with, and part of, their long-lived assets evaluation, as discussed in Energy Assets above. 

See Notes 4 and 5 for additional disclosures.

Other Assets 

Other assets consist primarily of notes and contracts receivable due to the Company from various customers and non-
current restricted cash. Other assets also include, the fair value of derivatives determined to be assets, the non-current portion of 
project development costs, accounts receivable retainages, sale-leaseback deferred loss and deferred contract costs. 

Asset Retirement Obligations 

The Company recognizes a liability for the fair value of required asset retirement obligations (“AROs”) when such 
obligations are incurred. The Company records, as liabilities, the fair value of the AROs on a discounted basis when incurred 
and reasonably estimated which is typically at the time the assets are installed or operating. Over time, the liabilities increase 
due to the change in present value, and initial capitalized costs are depreciated over the useful life of the related assets. Upon 
satisfaction of the ARO conditions, any difference between the recorded ARO liability and the actual retirement cost incurred is 
recognized as an operating gain or loss in the consolidated statements of income (loss). See Note 7 for additional disclosures on 
the Company’s AROs.

Federal ESPC Liabilities

Federal ESPC liabilities, for both projects and energy assets, represent the advances received from third-parties under 
agreements to finance certain ESPC projects with various federal government agencies. For projects related to the construction 
or installation of certain energy savings equipment or facilities developed for the government customer, upon completion and 
acceptance of the project by the government, typically within 24 to 36 months of construction commencement, the ESPC 
receivable from the government and corresponding ESPC liability is eliminated from the Company’s consolidated balance 
sheet. Until recourse to the Company ceases for the ESPC receivables transferred to the investor, upon final acceptance of the 
work by the government customer, the Company remains the primary obligor for financing received.

For small-scale energy assets developed for a government customer that the Company owns and operates, upon final 
acceptance of the work by the government customer, the Company remains the primary obligor for financing received until the 
liability is eliminated from the Company’s consolidated balance sheet as contract payments assigned by the customer are 
transferred to the investor.

Sale-Leaseback

During the first quarter of 2015, the Company entered into an agreement with an investor which gives the Company the 
option to sell and contemporaneously lease back solar photovoltaic (“solar PV”) projects. In September 2016, the Company 
amended this agreement to increase the investor’s commitment up to a maximum combined funding amount of $100,000 
through June 30, 2017 on certain projects. In May 2017, the Company amended this agreement to extend the end date of the 
agreement to June 30, 2018. This agreement was not extended further and expired on June 30, 2018. Additionally, the Company 
sold and contemporaneously leased back one solar PV project to another investor, not a party to the master lease agreement, 
under a new agreement during the twelve months ended December 31, 2017. During August 2018, the Company entered into an 
agreement with an investor which gives the Company the option to sell and contemporaneously lease back solar photovoltaic 
(“solar PV”) projects through August 2019 up to a maximum funding amount of $100,000. During August 2018, the Company 
sold and contemporaneously leased back two solar PV projects. See below for a summary of solar PV project sales by fiscal 
year:

62AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Year Ended

Year-ended December 31,
2016. . . . . . . . . . . . . . . . . .
Year-ended December 31,
2017. . . . . . . . . . . . . . . . . .
Year-ended December 31,
2018. . . . . . . . . . . . . . . . . .

# Solar PV
Projects
Sold
(actual #’s)

Sale Price

Deferred
Gain
Recorded

Deferred
Loss
Recorded

Capital
Lease
Asset/
Liability
Recorded

Initial
Lease
Term
(years)

6

$ 17,045

$

906

$

145

$

8,830

20-25

13

$ 51,204

$ 4,625

$ 1,204

$ 22,934

10-20

2

$ 5,145

$

574

$

— $

2,625

20

Minimum
Lease
Payment

Maximum
Lease
Payment

$

$

$

2

4

3

$

$

$

397

510

144

As part of these agreements, the Company is a party to a master lease agreement that provides for the sale of solar PV 

projects to a third-party investor and the simultaneous leaseback of the projects, which the Company then operates and 
maintains, recognizing revenue through the sale of the electricity and solar renewable energy credits generated by these 
projects. In sale-leaseback arrangements, the Company first determines whether the solar PV project under the sale-leaseback 
arrangement is “integral equipment.” A solar PV project is determined to be integral equipment when the cost to remove the 
project from its existing location, including the shipping and reinstallation costs of the solar PV project at the new site, 
including any diminution in fair value, exceeds 10% of the fair value of the solar PV project at the time of its original 
installation. When the leaseback arrangement expires, the Company has the option to purchase the solar PV project for the then 
fair market value or, in certain circumstances, renew the lease for an extended term. All solar PV projects sold to date under the 
sale-leaseback program have been determined by the Company not to be integral equipment as the cost to remove the project 
from its existing location would not exceed 10% of its original fair value.

For solar PV projects that the Company has determined not to be integral equipment, the Company then determines if the 
leaseback should be classified as a capital lease or an operating lease. All solar PV projects sold to date under the sale-leaseback 
program have been determined by the Company to be capital leases. For leasebacks classified as capital leases, the Company 
initially records a capital lease asset and capital lease obligation in its consolidated balance sheet equal to the lower of the 
present value of the Company’s future minimum leaseback payments or the fair value of the solar PV project. For capital 
leasebacks, the Company defers any gain or loss, representing the excess or shortfall of cash received from the investor 
compared to the net book value of the asset in the Company’s consolidated balance sheet at the time of the sale. The Company 
records the long term portion of any deferred gain or loss in other liabilities and other assets, respectively, and the current 
portion of any deferred gain and loss in accrued expenses and other current liabilities and prepaid expenses and other current 
assets, respectively, in its consolidated balance sheet and amortizes the deferred amounts over the lease term in cost of revenues 
in its consolidated statements of income (loss). Net amortization expense in cost of revenues related to deferred gains and losses 
was $213 and $79 of net gains for the year ended December 31, 2018 and December 31, 2017, respectively.

A summary of amounts related to sale leasebacks in the Company’s consolidated balance sheets is as follows:

December 31,
2018

Capital lease assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

38,263

Deferred loss, short-term, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred loss, long-term, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total deferred loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Capital lease liabilities, short-term. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital lease liabilities, long-term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total capital lease liabilites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Deferred gain, short-term, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred gain, long-term, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total deferred gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

115
1,917
2,032

4,956
28,407
33,363

345
5,808
6,153

$

$

$

$

December 31,
2017

36,676

118
2,054
2,172

4,157
30,712
34,869

338
5,835
6,173

63AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Other Liabilities 

Other liabilities consist primarily of deferred revenue related to multi-year operation and maintenance contracts which 
expire at various dates through 2033. Other liabilities also include the fair value of derivatives and the long term portion of sale-
leaseback deferred gains. See Note 18 for additional disclosures.

Revenue Recognition 

The Company derives revenues from energy efficiency and renewable energy products and services. Energy efficiency 

products and services include the design, engineering, and installation of equipment and other measures to improve the 
efficiency, and control the operation, of a facility’s energy infrastructure. Renewable energy products and services include the 
construction of small-scale plants that produce electricity, gas, heat or cooling from renewable sources of energy, the sale of 
such electricity, gas, heat or cooling from plants that the Company owns, and the sale and installation of solar energy products 
and systems. Below is a description of the Company’s primary lines of business.

Projects - The Company’s principal service relates to energy efficiency projects, which entails the design, engineering and 

installation of, and assisting with the arranging of financing for an ever-increasing array of innovative technologies and 
techniques to improve the energy efficiency, and control the operation, of a building’s energy- and water- consuming systems. 
In certain projects, the Company also designs and constructs for a customer a central plant or cogeneration system providing 
power, heat and/or cooling to a building, or a small-scale plant that produces electricity, gas, heat or cooling from renewable 
sources of energy.

Under Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606) the Company 
recognizes revenue from the installation or construction of projects over time using the cost-based input method. The Company 
uses the total costs incurred on the the project relative to the total expected costs to satisfy the performance obligation.

When the estimate on a contract indicates a loss, or claims against costs incurred reduce the likelihood of recoverability of 

such costs, the Company records the entire estimated loss in the period the loss becomes known. 

Operations & Maintenance (“O&M”) - After an energy efficiency or renewable energy project is completed, the Company 
often provides ongoing O&M services under a multi-year contract. These services include operating, maintaining and repairing 
facility energy systems such as boilers, chillers and building controls, as well as central power and other small-scale plants. For 
larger projects, the Company frequently maintains staff on-site to perform these services.

Maintenance revenue is recognized using the input method to recognize revenue. In most cases, O&M fees are fixed annual 

fees. Because the Company is on-site to perform O&M services, the services are typically a distinct series of promises, and 
those services have the same pattern of transfer to the customer (i.e., evenly over time), the Company records the revenue on a 
straight-line basis. Some O&M service contract fees are billed on time expended. In those cases, revenue is recorded based on 
the time expended in that month.

Energy Assets - The Company’s service offerings also includes the sale of electricity, processed renewable gas fuel, heat or 

cooling from the portfolio of assets that the Company owns and operates. The Company has constructed and is currently 
designing and constructing a wide range of renewable energy plants using landfill gas (“LFG”), wastewater treatment biogas, 
solar, biomass, other bio-derived fuels, wind and hydro sources of energy. Most of the Company’s renewable energy projects to 
date have involved the generation of electricity from solar PV and LFG or the sale of processed LFG. The Company purchases 
the LFG that otherwise would be combusted or vented, processes it, and either sells it or uses it in its energy plants. The 
Company has also designed and built, as well as owns, operates and maintains, plants that take biogas generated in the 
anaerobic digesters of wastewater treatment plants and turns it into renewable natural gas that is either used to generate energy 
on-site or that can be sold through the nation’s natural gas pipeline grid. Where the Company owns and operates energy 
producing assets, the Company typically enters into a long-term power purchase agreement (“PPA”) for the sale of the energy. 
Many of the Company’s energy assets also produce environmental attributes, including renewable energy credits (“RECs”) and 
Renewable Identification Numbers (“RINs”). In most cases, the Company sells these attributes under separate agreements with 
third parties other than the PPA customer.

The Company recognizes revenues from the sale and delivery of the energy output from renewable energy plants, over time 
as produced and delivered to the customer, in accordance with specific PPA contract terms. Environmental attributes revenue is 
recognized at a point in time, when the environmental attributes are transferred to the customer in accordance with the transfer 
protocols of the environmental attributes market that the Company operates in. In those cases where environmental attributes 
are sold to the same customer as the energy output, the Company records revenue monthly for both the energy output and the 

64AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

environmental attribute output, as generated and delivered to the customer. The Company has determined that certain power 
purchase agreements contain a lease component in accordance with Accounting Standards Codification (“ASC”) 840, leases. 
The Company recognized $7,238, $3,409 and $3,162 of operating lease revenue under these agreements during the years ended 
December 31, 2018, 2017 and 2016, respectively.    

Other - The Company’s service and product offerings also include integrated-PV and consulting and enterprise energy 

management services.

The Company recognizes revenues from delivery of engineering, consulting services and enterprise energy management 
services over time.  For the sale of solar materials, revenue is recognized at a point in time when the Company has transferred 
physical control of the asset to the customer upon shipment.  

To the extent a contract is deemed to have multiple performance obligations, the Company allocates the transaction price of 

the contract to each performance obligation using its best estimate of the standalone selling price of each distinct good or 
service in the contract.

Billings in excess of cost and estimated earnings represents advanced billings on certain construction contracts. Costs and 

estimated earnings in excess of billings represent certain amounts under customer contracts that were earned and billable but 
not invoiced.

Results for reporting periods beginning January 1, 2018 are presented under Topic 606, while prior period amounts are not 

adjusted and continue to be reported under ASC 605, Revenue Recognition.  

Cost of Revenues

Cost of revenues include the cost of labor, materials, equipment, subcontracting and outside engineering that are required 
for the development and installation of projects, as well as preconstruction costs, sales incentives, associated travel, inventory 
obsolescence charges, amortization of intangible assets related to customer contracts, and, if applicable, costs of procuring 
financing. A majority of the Company’s contracts have fixed price terms; however, in some cases the Company negotiates 
protections, such as a cost-plus structure, to mitigate the risk of rising prices for materials, services and equipment. 

Cost of revenues also include the costs of maintaining and operating the small-scale renewable energy plants that the 

Company owns, including the cost of fuel (if any) and depreciation charges.

 Income Taxes 

The Company provides for income taxes based on the liability method. The Company provides for deferred income taxes 
based on the expected future tax consequences of differences between the financial statement basis and the tax basis of assets 
and liabilities calculated using the enacted tax rates in effect for the year in which the differences are expected to be reflected in 
the tax return. 

The Company accounts for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving 

uncertain tax positions. The evaluation of uncertain tax positions is based on factors that include, but are not limited to, changes 
in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters 
subject to audit, new audit activity and changes in facts or circumstances related to a tax position. The Company evaluates 
uncertain tax positions on a quarterly basis and adjusts the level of the liability to reflect any subsequent changes in the relevant 
facts surrounding the uncertain positions.

The Company’s liabilities for uncertain tax positions can be relieved only if the contingency becomes legally extinguished 

through either payment to the taxing authority or the expiration of the statute of limitations, the recognition of the benefits 
associated with the position meet the “more-likely-than-not” threshold or the liability becomes effectively settled through the 
examination process.

The Company considers matters to be effectively settled once the taxing authority has completed all of its required or 

expected examination procedures, including all appeals and administrative reviews; the Company has no plans to appeal or 
litigate any aspect of the tax position; and the Company believes that it is highly unlikely that the taxing authority would 
examine or re-examine the related tax position. The Company also accrues for potential interest and penalties, related to 
unrecognized tax benefits in income tax expense.

The Company has presented all deferred tax assets and liabilities as net and noncurrent on its consolidated balance sheet as 

of December 31, 2018 and 2017, respectively.

65AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

See Note 9 for additional information on the Company’s income taxes. 

Foreign Currency 

The local currency of the Company’s foreign operations is considered the functional currency of such operations. All assets 

and liabilities of the Company’s foreign operations are translated into U.S. dollars at year-end exchange rates. Income and 
expense items are translated at average exchange rates prevailing during the year. Translation adjustments are accumulated as a 
separate component of stockholders’ equity. Foreign currency translation gains and losses are reported in the consolidated 
statements of comprehensive income (loss). Foreign currency transaction gains and losses are reported in the consolidated 
statements of income (loss). 

Financial Instruments 

Financial instruments consist of cash and cash equivalents, restricted cash, accounts and notes receivable, long-term 
contract receivables, accounts payable, accrued expenses, capital lease assets and liabilities, contingent considerations, short- 
and long-term borrowings, interest rate swaps, and commodity swaps. Because of their short maturity, the carrying amounts of 
cash and cash equivalents, restricted cash, accounts and notes receivable, accounts payable, and accrued expenses approximate 
fair value.

Stock-Based Compensation Expense 

Stock-based compensation expense results from the issuance of shares of restricted common stock and grants of stock 
options to employees, directors, outside consultants and others. The Company recognizes the costs associated with restricted 
stock option grants, and employee stock purchases made via the Company’s Employee Stock Purchase Plan (the “ESPP”) using 
the fair value recognition provisions of accounting standards codification (“ASC”) 718, Compensation - Stock Compensation 
(“ASC 718”) on a straight-line basis over the vesting period of the awards. Certain option grants have performance conditions 
that must be achieved prior to vesting and are expensed based on the expected achievement at each reporting period. Stock-
based compensation expense is also recognized in association with employee stock purchases related to the Company’s ESPP.

Stock-based compensation expense is recognized based on the grant-date fair value. The Company estimates the fair value 
of the stock-based awards, including stock options, using the Black-Scholes option-pricing model. Determining the fair value of 
stock-based awards requires the use of highly subjective assumptions, including the fair value of the common stock underlying 
the award, the expected term of the award and expected stock price volatility.

The assumptions used in determining the fair value of stock-based awards represent management’s estimates, which 

involve inherent uncertainties and the application of management judgment. As a result, if factors change, and different 
assumptions are employed, the stock-based compensation could be materially different in the future. The risk-free interest rates 
are based on the U.S. Treasury yield curve in effect at the time of grant, with maturities approximating the expected life of the 
stock options. 

The Company has no history of paying dividends. Additionally, as of each of the grant dates, there was no expectation that 

the Company would pay dividends over the expected life of the options. The expected life of the awards is estimated using 
historical data and management’s expectations. The Company uses historical volatility as the expected volatility assumption 
required in the Black-Scholes model. 

The Company recognizes compensation expense for only the portion of options that are expected to vest.  If there are any 

modifications or cancellations of the underlying invested securities or the terms of the stock option, it may be necessary to 
accelerate, increase or cancel any remaining unamortized stock-based compensation expense.  As a result of the adoption of 
ASU 2016-09, during fiscal year 2017, no significant changes were made to the Company’s accounting for forfeitures.  Upon 
adoption the Company recorded a $4,000 deferred tax asset and corresponding credit to retained earnings for excess tax benefits 
that had not previously been recognized because the related tax deductions had not reduced taxes payable. 

The Company also accounts for equity instruments issued to non-employee directors and consultants at fair value. All 
transactions in which goods or services are the consideration received for the issuance of equity instruments are accounted for 
based on the fair value of the equity instruments to be issued. The measurement date of the fair value of the equity instrument 
issued is the grant date, which is the date that the Company and the grantee reach a mutual understanding of the key terms and 
conditions of the award. 

 No awards to individuals who were not either an employee or director of the Company occurred during the years ended 

December 31, 2018, 2017 and 2016.

66AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Fair Value Measurements 

The Company follows the guidance related to fair value measurements for all of its non-financial assets and non-financial 
liabilities, except for those recognized at fair value in the financial statements at least annually. These assets include goodwill 
and long-lived assets measured at fair value for impairment assessments, and non-financial assets and liabilities initially 
measured at fair value in a business combination. 

The Company’s financial instruments include cash and cash equivalents, restricted cash, accounts and notes receivable, 

long-term contract receivables, accounts payable, accrued expenses, capital lease assets and liabilities, contingent 
considerations, short- and long-term borrowings, interest rate swaps, and commodity swaps. Because of their short maturity, the 
carrying amounts of cash and cash equivalents, restricted cash, accounts and notes receivable, accounts payable, and accrued 
expenses approximate fair value. The carrying value of long-term variable-rate debt approximates fair value. As of 
December 31, 2018, the carrying value of the Company’s long-term debt exceeds its fair value of $211,823 by approximately 
$864. Fair value of the Company’s debt is based on quoted market prices or on rates available to the Company for debt with 
similar terms and maturities, which are level two inputs of the fair value hierarchy, as defined in Note 17.

The Company accounts for its interest rate swaps and commodity swaps as derivative financial instruments in accordance 

with the related guidance. Under this guidance, derivatives are carried on the Company’s consolidated balance sheets at fair 
value. The fair value of the Company’s interest rate and commodity swaps are determined based on observable market data in 
combination with expected cash flows for each instrument. The Company accounts for its make-whole provision features as 
embedded derivatives in accordance with related guidance.  Under this guidance, the derivative is bifurcated from its host 
contract and recorded on the Company’s consolidated balance sheets at fair value.  The fair value of the Company’s make-
whole provisions are determined based on observable market data and a with and without model.

 The consideration for the Company’s acquisitions often includes future payments that are contingent upon the occurrence 

of a particular event. The Company records a contingent consideration obligation for such contingent consideration payments at 
fair value on the acquisition date. The Company estimates the acquisition date fair value of contingent consideration obligations 
through valuation models that incorporate probability adjusted assumptions related to the achievement of the milestones and the 
likelihood of making related payments. Each period the Company revalues the contingent consideration obligations associated 
with the acquisition to fair value and records changes in the fair value as contingent consideration expense within the selling, 
general and administrative expenses line in our consolidated statements of income (loss). Increases or decreases in the fair value 
of the contingent consideration obligations can result from changes in assumed discount periods and rates, changes in the 
assumed timing and amount of revenue and expense estimates and changes in assumed probability with respect to the 
attainment of certain financial and operational metrics, among others. Significant judgment is employed in determining these 
assumptions as of the acquisition date and for each subsequent period. Accordingly, future business and economic conditions, 
as well as changes in any of the assumptions described above, can materially impact the amount of contingent consideration 
expense recorded in any given period.  However, deferred consideration related to certain holdbacks and completion payments 
are considered short-term in nature.  These amounts are recorded at full value and are only revalued if one of those underlying 
assumptions changes. 

See Note 17 for additional information related to fair value measurements.

Share Repurchase Program

In April 2016, the Company’s Board of Directors authorized the repurchase of up to $10,000 of the Company’s Class A 
common stock from time to time on the open market in privately negotiated transactions. In February 2017, the Company’s 
Board of Directors authorized an increase in the Company’s share repurchase authorization to $15,000 of the Company's Class 
A common stock from time to time on the open market or in privately negotiated transactions. The timing and amount of any 
shares repurchased will be determined by the Company’s management based on its evaluation of market conditions and other 
factors. Any repurchased shares will be available for use in connection with its stock plans and for other corporate purposes. 
The repurchase program has and will be funded using the Company’s working capital and borrowings under its revolving line 
of credit. The Company accounts for share repurchases using the cost method. Under this method, the cost of the share 
repurchase is recorded entirely in treasury stock, a contra equity account. During the year ended December 31, 2018, the 
Company repurchased 218 shares of common stock in the amount of $1,839, including fees of $9. During the year ended 
December 31, 2017, the Company repurchased 575 shares of common stock in the amount of $3,412, net of fees of $23.

67AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Derivative Financial Instruments 

In the normal course of business, the Company utilizes derivatives contracts as part of its risk management strategy to 

manage exposure to market fluctuations in interest and commodity rates. These instruments are subject to various credit and 
market risks. Controls and monitoring procedures for these instruments have been established and are routinely reevaluated. 
Credit risk represents the potential loss that may occur because a party to a transaction fails to perform according to the terms of 
the contract. The measure of credit exposure is the replacement cost of contracts with a positive fair value. The Company seeks 
to manage credit risk by entering into financial instrument transactions only through counterparties that the Company believes 
to be creditworthy. 

Market risk represents the potential loss due to the decrease in the value of a financial instrument caused primarily by 
changes in interest rates and commodity prices. The Company seeks to manage market risk by establishing and monitoring 
limits on the types and degree of risk that may be undertaken. As a matter of policy, the Company does not use derivatives for 
speculative purposes. The Company considers the use of derivatives with all financing transactions to mitigate risk. 

The Company recognizes cash flows from derivative instruments as operating activities in the consolidated statements of 
cash flows. The effective portion of changes in fair value on interest rate swaps designated as cash flow hedges are recognized 
in the Company’s consolidated statements of comprehensive income (loss). Changes in fair value on derivatives not designated 
as hedges are recognized in the Company’s consolidated statements of income (loss).

In July 2018, the Company had an early prepayment on one of its term loans that had a related interest rate swap that was 

designated as a hedging instrument, which was canceled and de-designated as a hedge instrument. The Company does not have 
a history of prepaying its loans and notes that another prepayment is not probable and a forced prepayment of any of its hedged 
term or construction loans is remote. See Note 18 for additional information concerning the de-designation of this interest rate 
swap. 

In June 2018, the Company entered into a term loan agreement, discussed in Note 8, that contained an interest make-whole 

provision.  In August 2018, the Company signed a joinder to the above agreement, which added another series of notes to the 
term loan that also contained an interest make-whole provision.  The Company determined that these provisions fulfill the 
requirements of an embedded derivative instrument that were required to be bifurcated from its host agreement. The instrument 
is revalued periodically and the changes in fair value are recognized as either gains or losses in earnings in the Company’s 
consolidated statements of income (loss).

See Notes 17 and 18 for additional information on the Company’s derivative instruments.

Earnings Per Share

Basic earnings per share is calculated using the Company’s weighted-average outstanding common shares, including 
vested restricted shares. When the effects are not anti-dilutive, diluted earnings per share is calculated using the weighted-
average outstanding common shares; the dilutive effect of convertible preferred stock, under the “if converted” method; and the 
treasury stock method with regard to warrants and stock options; all as determined under the treasury stock method.

Net income attributable to common shareholders . . . . . . . . . . . . . . . . . . $

37,984

$

37,491

$

Basic weighted-average shares outstanding . . . . . . . . . . . . . . . . . . . . . . .
Effect of dilutive securities:

45,729

45,509

Stock options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted weighted-average shares outstanding . . . . . . . . . . . . . . . . . . . . .

1,102
46,831

239
45,748

12,032

46,409

84
46,493

2018

Year Ended December 31,
2017

2016

For the years ended December 31, 2018, 2017 and 2016, 692, 2,560 and 3,530 shares of common stock, respectively, 
related to stock options were excluded from the calculation of dilutive shares since the inclusion of such shares would be anti-
dilutive. 

Variable Interest Entities

Certain contracts are executed jointly through partnership and joint venture arrangements with unrelated third parties. The 
arrangements are often formed for the single business purpose of executing a specific project and allow the Company to share 
risks and/or secure specialty skills required for project execution.

68AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

        The Company evaluates each partnership and joint venture at inception to determine if it qualifies as a VIE under ASC 810, 
Consolidation. A variable interest entity is an entity used for business purposes that either (a) does not have equity investors with 
voting rights or (b) has equity investors who are not required to provide sufficient financial resources for the entity to support its 
activities  without  additional  subordinated  financial  support.  Upon  the  occurrence  of  certain  events  outlined  in ASC  810,  the 
Company reassesses its initial determination of whether the partnership or joint venture is a VIE.

        The Company also evaluates whether it is the primary beneficiary of each VIE and consolidates the VIE if the Company has 
both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb losses of, or the 
right to receive benefits from, the entity that could potentially be significant to the VIE. The Company considers the contractual 
agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights 
and board representation of the respective parties in determining whether it qualifies as the primary beneficiary. The Company 
also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary.  
When the Company is determined to be the primary beneficiary, the VIE is consolidated. As required by ASC 810, management's 
assessment of whether the Company is the primary beneficiary of a VIE is continuously performed. 

The Company generally aggregates the disclosures of its VIEs based on certain qualitative and quantitative factors including 
the purpose and design of the underlying VIEs, the nature of the assets in the VIE, and the type of involvement the Company has 
with the VIE including its role and type of interest held in the VIE. As of December 31, 2018, all the VIEs that make up the 
Company’s investment funds are similar in purpose, design, and the Company’s involvement and, as such, are aggregated in one 
disclosure. See Note 10 for additional disclosures.

Redeemable Non-Controlling Interests

In each of September 2015, June 2017, June 2018 and October 2018, the Company formed an investment fund with a 

different third party investor which granted the applicable investor ownership interests in the net assets of certain of the 
Company’s renewable energy project subsidiaries. The Company currently has four such investment funds each with a different 
third party investor.

The Company entered into these agreements in order to finance the costs of constructing energy assets which are under 

long-term customer contracts. The Company has determined that these entities qualify as VIEs and that it is the primary 
beneficiary in the operational partnerships for accounting purposes. Accordingly, the Company will consolidate the assets and 
liabilities and operating results of the entities in its consolidated financial statements. The Company will recognize the 
investors’ share of the net assets of the subsidiaries as redeemable non-controlling interests in its consolidated balance sheet.

The Company has determined that the provisions in the contractual arrangements represent substantive profit-sharing 

arrangements. The Company has further determined that the appropriate methodology for attributing income and loss to the 
redeemable non-controlling interests each period is a balance sheet approach referred to as the hypothetical liquidation at book 
value (“HLBV”) method. Under the HLBV method, the amounts of income and loss attributed to the redeemable non-
controlling interests in the consolidated statements of income (loss) reflect changes in the amounts the investors would 
hypothetically receive at each balance sheet date under the liquidation provisions of the contractual agreements, assuming the 
net assets of this funding structure were liquidated at recorded amounts. The investors’ non-controlling interest in the results of 
operations of this funding structure is determined as the difference in the non-controlling interest’s claim under the HLBV 
method at the start and end of each reporting period, after taking into account any capital transactions, such as contributions or 
distributions, between the Company’s subsidiaries and the investors. The use of the HLBV methodology to allocate income to 
the redeemable non-controlling interest holders may create volatility in the Company’s consolidated statements of income (loss) 
as the application of HLBV can drive changes in net income available and loss attributable to the redeemable non-controlling 
interests from quarter to quarter. 

The Company classified the non-controlling interests with redemption features that are not solely within the control of the 

Company outside of permanent equity on its consolidated balance sheets. The redeemable non-controlling interests will be 
reported using the greater of their carrying value at each reporting date as determined by the HLBV method or the estimated 
redemption values in each reporting period.

See Notes 10 and 11 for additional disclosures.

69AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Recent Accounting Pronouncements

Revenue Recognition

On January 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606), using the 

modified retrospective method applied to those contracts which were not completed as of December 31, 2017. Results for 
reporting periods beginning January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and 
continue to be reported under the accounting standards in effect for the prior period. The Company recorded an adjustment of 
$4,454 to retained earnings on January 1, 2018 due to the cumulative impact of adopting Topic 606. See Note 3 "Revenue from 
Contracts with Customers" for the required disclosures related to the impact of adopting this standard and a discussion of the 
Company's updated policies related to revenue recognition discussed below. 

The Company derives revenues from energy efficiency and renewable energy products and services. Energy efficiency 

products and services include the design, engineering, and installation of equipment and other measures to improve the 
efficiency, and control the operation, of a facility’s energy infrastructure. Renewable energy products and services include the 
construction of small-scale plants that produce electricity, gas, heat or cooling from renewable sources of energy, the sale of 
such electricity, gas, heat or cooling from plants that the Company owns, and the sale and installation of solar energy products 
and systems. For a description of the Company’s primary lines of business, see Revenue Recognition above. 

Intangibles-Goodwill and Other

In August 2018, the Financial Accounting Standards Board (“FASB”) issued ASU 2018-15, Intangibles - Goodwill and 

Other - Internal-Use-Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud 
Computing Arrangement That Is a Service Contract, which clarifies the accounting for implementation, setup, and upfront costs 
and aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract 
with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The new 
standard is effective interim and annual periods beginning after December 15, 2019, with early adoption permitted, and can be 
applied either retrospectively or prospectively. The Company is currently evaluating the impact ASU 2018-13 on its 
consolidated financial statements, but does not expect that the adoption of this guidance will have a significant impact on its 
consolidated financial statements.

Derivatives and Hedging

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to 

Accounting for Hedging Activities, which improves the financial reporting of hedging relationships to better portray the 
economic results of an entity's risk management activities in its financial statements. ASU 2017-12 is effective for annual 
reporting periods beginning after December 15, 2018, including interim periods within those annual reporting periods. Early 
adoption is permitted. The Company adopted ASU 2017-12 during the third quarter of 2018. Upon adoption, the Company 
recognized an increase to retained earnings and an accumulated other comprehensive loss of $432 to remove the cumulative 
effect of hedging ineffectiveness previously recognized in earnings, as of January 1, 2018, for contracts designated as hedging 
instruments that were outstanding at the beginning of the third quarter 2018. The Company also recognized a decrease in other 
expenses, net and an increase in accumulated other comprehensive loss of $54 to remove the cumulative effect of hedging 
ineffectiveness previously recognized in earnings through 2018.

In October 2018, the FASB issued ASU No. 2018-16 Derivatives and Hedging (Topic 815): Inclusion of the Secured 
Overnight Financing Rate (“SOFR”) Overnight Index Swap (“OIS”) Rate as a Benchmark Interest Rate for Hedge Accounting 
Purposes, which permits the use of the OIS rate as a U.S. benchmark interest rate for hedge accounting purposes.  The 
Company adopted ASU 2018-16 in the fourth quarter of 2018. The adoption had no impact on the Company’s consolidated 
financial statements.

Fair Value Measurement

In August 2018, the FASB issued ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to 

the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value 
measurements. ASU 2018-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within 
those fiscal years. The Company is currently evaluating the impact ASU 2018-13 on its consolidated financial statements, but 
does not expect that the adoption of this guidance will have a significant impact on its consolidated financial statements.

70AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Leases

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this ASU supersedes the leasing 

guidance in Topic 840, Leases. Under the new guidance, the Company is electing to only recognize lease assets and lease 
liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or 
operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 is effective for 
fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company has 
completed its evaluation on the impact on the consolidated financial statements of the adoption of ASU 2016-02, and is 
adopting the standard as of January 1, 2019. 

 On January 1, 2019, the Company adopted ASU 2016-02 using the modified retrospective approach of applying the new 

standard at the adoption date. The Company also elected the package of practical expedients permitted under the transition 
guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease 
classification. The Company is also choosing to apply the policy election under ASC 842 that allows the Company to not 
include its short-term leases in its calculation of right-of-use asset or liability and instead continue to recognize expense on a 
straight-line basis over the remaining lease term for these leases.   

As a result of the adoption of ASC 842, the Company expects to recognize an increase in net lease assets between $30.6 

million and $33.8 million and an increase in net lease liabilities between $32.4 million and $35.7 million related to the 
recognition of a right-of-use asset and the associated liability. The Company is in the process of evaluating if there was an 
impairment of the previously unrecognized right-of-use assets effective January 1, 2019. The Company is currently working to 
complete the implementation of new processes and information technology tools to assist in our ongoing lease data collection 
and analysis as well as updating our accounting policies and internal controls in connection with the adoption of the new 
standard. 

Stock Based Compensation Expense 

In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of 

Modification Accounting. This new guidance amends the scope of modification accounting for share-based payment awards. 
ASU 2017-09 provide guidance on the types of changes to the terms or conditions of share-based payment awards to which an 
entity would be required to apply modification accounting under ASC 718. ASU 2017-09 is effective for fiscal years beginning 
after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. The Company 
adopted these requirements on January 1, 2018. The adoption had no impact on the Company’s consolidated financial 
statements.

In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to 

Nonemployee Share-Based Payment Accounting, which expands the scope of current stock compensation recognition standards 
to include share-based payment transactions for acquiring goods and services from nonemployees. ASU 2018-07 will become 
effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is 
permitted, but no earlier than an entity's adoption date of ASU 2014-09 (Topic 606), which the Company adopted on January 1, 
2018. The Company adopted ASU 2018-07 during the second quarter of 2018. The adoption had no impact on the Company’s 
consolidated financial statements, as the Company currently has no issued share-payments to non-employees. 

Consolidated Statements of Cash Flow

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash 
Receipts and Cash Payments. ASU 2016-15 eliminates diversity in practice in how certain cash receipts and cash payments are 
presented and classified in the consolidated statements of cash flows. ASU 2016-15 is effective for fiscal years beginning after 
December 15, 2017, including interim periods within those fiscal years, with early adoption permitted.  The Company adopted 
these requirements on January 1, 2018. The adoption had no impact on the Company’s consolidated financial statements.

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash. ASU 
2016-18 requires restricted cash and cash equivalents to be included with cash and cash equivalents on the statement of cash 
flows. ASU 2016-18 is effective for annual reporting periods beginning after December 15, 2017, and interim periods within 
those fiscal years. Early adoption is permitted. The guidance should be applied using a retrospective transition method for each 
period presented. The Company has adopted this guidance as of January 1, 2018 and the consolidated statement of cash flow 
has been prepared to conform with ASU 2016-18 for all periods presented.

71AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Accumulated Other Comprehensive Income

In February 2018, the FASB issued ASU 2018-02, Income Statement – Reporting Comprehensive Income (Topic 220) – 

Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, to allow entities to reclassify the 
income tax effects of tax reform legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”) on items within 
accumulated other comprehensive income to retained earnings. ASU 2018-02 is effective for fiscal years and interim periods 
within those years beginning after December 15, 2018, and early adoption is permitted. The Company is currently evaluating 
the impact ASU 2018-02 on its consolidated financial statements. 

Business Combinations

In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a 

Business, which provides guidance to entities to assist with evaluating when a set of transferred assets and activities 
(collectively, the “set”) is a business and provides a screen to determine when a set is not a business. Under the new guidance, 
when substantially all of the fair value of gross assets acquired (or disposed of) is concentrated in a single identifiable asset, or 
group of similar assets, the assets acquired would not represent a business. Also, to be considered a business, an acquisition 
would have to include an input and a substantive process that together significantly contribute to the ability to produce outputs. 
The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, 
and should be applied on a prospective basis to any transactions occurring within the period of adoption. Early adoption is 
permitted for interim or annual periods in which the financial statements have not been issued. The Company adopted the 
guidance effective January 1, 2018, and its adoption did not have a significant impact on the Company’s financial position or 
financial statement disclosures.

3. REVENUE FROM CONTRACTS WITH CUSTOMERS

Adoption

On January 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers, (Topic 606) using the 

modified retrospective method applied to those contracts which were not completed as of December 31, 2017. Results for 
reporting periods beginning January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and 
continue to be reported under the accounting standards in effect for the prior period. The Company recorded a net decrease to 
beginning retained earnings of $4,454 on January 1, 2018 due to the cumulative impact of adopting Topic 606, as detailed 
below. 

Assets:

Costs and estimated earnings in excess of billings . . .
Prepaid expenses and other current assets . . . . . . . . .
Deferred income taxes, net . . . . . . . . . . . . . . . . . . . . .

Liabilities:

Accrued expenses and other current liabilities . . . . . .
Deferred income taxes, net . . . . . . . . . . . . . . . . . . . . .

Shareholders' Equity:

January 1, 2018

As Reported

606 Adjustments

Adjusted
Balances

$

104,852
14,037
—

23,260
584

$

(9,194)
4,343
1,003

1,190
(584)

95,658
18,380
1,003

24,450
—

Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . .

235,844

(4,454)

231,390

72AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

In accordance with Topic 606, the disclosure of the impact of adoption to the Company’s consolidated statements of 

income (loss) and balance sheets was as follows:

Impact of changes in accounting policies

12/31/2018

Balances
without
adoption of
Topic 606

Effect of
Change
Higher/
(Lower)

$

$

784,316
610,229
174,087

2,822
3,297
(475)

As Reported
787,138
$
613,526
173,612

114,513
59,099
16,709

42,390
4,813
37,577

114,513
59,574
16,709

42,865
4,998
37,867

407

407

$
$
$

37,984
0.83
0.81

$
$
$

38,274
0.84
0.82

$
$
$

—
(475)
—

(475)
(185)
(290)

—

(290)
(0.01)
(0.01)

Revenues . . . . . . . . . . . . . . . . . . . .
Cost of revenues . . . . . . . . . . . . . .
Gross profit . . . . . . . . . . . . . . . . . .
Operating expenses:
Selling, general and
administrative expenses . . . . . . . .
Operating income . . . . . . . . . . . . .
Other expenses, net . . . . . . . . . . . .
Income before provision for
income taxes . . . . . . . . . . . . . . . . .
Income tax provision. . . . . . . . . . .
Net income . . . . . . . . . . . . . . . . . .
Net income attributable to
redeemable non-controlling
interests . . . . . . . . . . . . . . . . . . . . .
Net income attributable to
common shareholders . . . . . . . . . .
Basic income per share . . . . . . . .
Diluted income per share . . . . . .

December 31, 2018

Balances
without
adoption of
Topic 606

Effect of
Change
Higher/
(Lower)

As Reported

Assets:

Costs and estimated earnings in excess of billings . .
Prepaid expenses and other current assets . . . . . . . . .

$

86,842

$

93,214

$

11,571

10,644

Liabilities:

Accrued expenses and other current liabilities . . . . .
Deferred income taxes, net . . . . . . . . . . . . . . . . . . . .

35,947

4,352

34,877

6,123

Shareholders' Equity:

(6,372)
927

1,070
(1,771)

Retained earnings. . . . . . . . . . . . . . . . . . . . . . . . . . . .

269,806

274,550

(4,744)

The impact in revenue recognition due to the adoption of Topic 606 is primarily from the timing of revenue recognition for 
uninstalled materials, amortization of contract acquisition costs over the contract term, and timing of revenue recognition from 
renewable energy credits.  See Note 2 for a summary of the Company’s significant policies for revenue recognition.

73AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Disaggregation of Revenue

The following table provides information about disaggregated revenue by line of business, reportable segments, and 

geographical region for the year ended December 31, 2018. 

US Regions U.S. Federal

Canada

Non-Solar
DG

All Other

Total

Line of Business
Year ended December 31, 2018
Project revenue . . . . . . $
O&M revenue . . . . . . .
Energy assets. . . . . . . .
Other . . . . . . . . . . . . . .
Total revenues

$

296,226
17,814
18,442
1,862
334,344

Geographical Regions

Year ended December 31, 2018
United States . . . . . . . . $
Canada. . . . . . . . . . . . .
Other . . . . . . . . . . . . . .
Total revenues

$

334,344
—
—
334,344

$

$

$

$

Contract Balances 

202,286
39,250
4,062
711
246,309

246,309
—
—
246,309

$

$

$

$

29,571
37
2,604
6,770
38,982

2,557
36,425
—
38,982

$

$

$

$

4,550
8,135
69,599
371
82,655

82,655
—
—
82,655

$

$

$

$

12,420
—
1,069
71,359
84,848

68,883
303
15,662
84,848

$

$

$

$

545,053
65,236
95,776
81,073
787,138

734,748
36,728
15,662
787,138

The following table provides information about receivables, contract assets and contract liabilities from contracts with 

customers:

January 1, 2018

Accounts receivable, net. . . . . . . . . . . . . . . . . . . . .
Accounts receivable retainage, net . . . . . . . . . . . . .

$

Contract Assets:

Costs and estimated earnings in excess of billings.

Contract Liabilities:

Billings in excess of cost and estimated earnings. .

85,121
17,484

95,658

27,248

December 31, 2018
85,985
$
13,516

86,842

30,706

Accounts receivable retainage represents amounts due from customers, but where payments are withheld contractually 

until certain construction milestones are met. Amounts retained typically range from 5% to 10% of the total invoice. The 
Company classifies as a current asset those retainages that are expected to be billed in the next twelve months. Unbilled 
revenue, presented as costs and estimated earnings in excess of billings, represent amounts earned and billable that were not 
invoiced at the end of the fiscal period. 

Contract assets represent the Company’s rights to consideration in exchange for services transferred to a customer that have 

not been billed as of the reporting date. The Company’s rights to consideration are generally unconditional at the time its 
performance obligations are satisfied.

At the inception of a contract, the Company expects the period between when it satisfies its performance obligations, and 

when the customer pays for the services, will be one year or less. As such, the Company has elected to apply the practical 
expedient which allows the Company to not adjust the promised amount of consideration for the effects of a significant 
financing component, when a financing component is present. 

74AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

When the Company receives consideration, or such consideration is unconditionally due, from a customer prior to 

transferring goods or services to the customer under the terms of a sales contract, the Company records deferred revenue, which 
represents a contract liability. Such deferred revenue typically results from billings in excess of costs incurred and advance 
payments received on project contracts.  As of December 31, 2018, the Company classified $6,342 as a non-current liability, 
included in other liabilities on the consolidated balance sheets, for those performance obligations expected to be completed 
beyond the next twelve months.

The decrease in contract assets for the year ended December 31, 2018 was primarily due to billings of approximately 
$510,470, offset in part by revenue recognized of $485,143. The change in contract liabilities was primarily driven by the 
receipt of advance payments from customers, and related billings, exceeding reductions from recognition of revenue as 
performance obligations were satisfied. For the year ended December 31, 2018, the Company recognized revenue of $95,318, 
and billed customers $80,007, that was previously included in the beginning balance of contract liabilities. Changes in contract 
liabilities are also driven by reclassifications to or from contract assets as a result of timing of customer payments. 

Contracts are often modified for a change in scope or other requirements. The Company considers contract modifications 

to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of the 
Company’s contract modifications are for goods or services that are not distinct from the existing performance obligations.  The 
effect of a contract modification on the transaction price, and the measure of progress for the performance obligation to which it 
relates, is recognized as an adjustment to revenue (either as an increase or decrease) on a cumulative catchup basis. 

The Company elected to utilize the modified retrospective transition practical expedient which allows the Company to 
evaluate the impact of contract modifications as of the adoption date rather than evaluating the impact of the modifications at 
the time they occurred prior to the adoption date. 

Performance obligations

A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of 

account in ASC Topic 606. Performance obligations are satisfied as of a point in time or over time and are supported by 
contracts with customers. For most of the Company’s contracts, there are multiple promises of goods or services. Typically,  the 
Company provides a significant service of integrating a complex set of tasks and components such as design, engineering, 
construction management, and equipment procurement for a project contract. The bundle of goods and services are provided to 
deliver one output for which the customer has contracted.  In these cases, the Company considers the bundle of goods and 
services to be a single performance obligation. The Company may also promise to provide distinct goods or services within a 
contract, such as a project contract for installation of energy conservation measures and post-installation O&M services. In 
these cases the Company separates the contract into more than one performance obligation. If a contract is separated into more 
than one performance obligation, the Company allocates the total transaction price to each performance obligation in an amount 
based on the estimated relative standalone selling prices of the promised goods or services underlying each performance 
obligation. 

Backlog - The Company’s remaining performance obligations (hereafter referred to as “backlog”) represent the 

unrecognized revenue value of the Company’s contract commitments. The Company’s backlog may vary significantly each 
reporting period based on the timing of major new contract commitments and the backlog may fluctuate with currency 
movements. In addition, our customers have the right, under some circumstances, to terminate contracts or defer the timing of 
the Company’s services and their payments to us. At December 31, 2018, the Company had backlog of 
approximately $1,660,800. Approximately 25%, of our December 31, 2018 backlog is anticipated to be recognized as revenue 
in the next twelve months and the remaining, thereafter. 

The Company has applied the practical expedient for certain revenue streams to exclude the value of remaining 
performance obligations for (i) contracts with an original expected term of one year or less or (ii) contracts for which the 
Company recognizes revenue in proportion to the amount it has the right to invoice for services performed.

Contract acquisition costs:

In connection with the adoption of Topic 606, the Company is required to account for certain acquisition cost over the life 

of the contract, consisting primarily of commissions when paid. Commission costs are incurred commencing at contract 
signing. Commission costs are allocated across all performance obligations and deferred and amortized over the contract term 
on a progress towards completion basis. 

75AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

 As of January 1, 2018 and December 31, 2018, the Company capitalized $927 in commission costs related to contracts that 

were not completed. For contracts that have a duration of less than one year, the Company follows a practical expedient and 
expenses these costs when incurred. During the year ended December 31, 2018, the amortization of commission costs related to 
contracts were not material and have been included in the accompanying consolidated statements of income (loss). 
Additionally, no impairment charges in connection with the Company’s commission costs or project development costs were 
recorded during the period ended December 31, 2018.

The Company analyzed the impact of adoption of Topic 606 on the Company’s project development costs and determined 

no change in the Company’s accounting policy was required.  In the year ended December 31, 2018, $15,672 of project 
development costs were recognized in the consolidated statement of income (loss) on projects that converted to customer 
contracts. 

4. BUSINESS ACQUISITIONS AND RELATED TRANSACTIONS

The Company accounts for acquisitions using the acquisition method in accordance with ASC 805, Business 

Combinations. The purchase price for each has been allocated to the assets based on their estimated fair values at the date of 
each acquisition as set forth in the table below. The excess purchase price over the estimated fair value of the net assets, which 
are calculated using level 3 inputs per the fair value hierarchy as defined in Note 17, acquired has been recorded as goodwill. 
Intangible assets, if identified, have been recorded and are being amortized over periods ranging from one to fifteen years. See 
Note 5 for additional information.

Determining the fair value of certain assets and liabilities assumed is judgmental in nature and often involves the use of 
significant estimates and assumptions. Certain amounts below are provisional based on our best estimates using information 
available as of the reporting date. The Company is waiting for information to become available to finalize its valuation of 
certain elements of these transactions. Specifically, the assigned values for energy assets, intangibles, and goodwill are 
provisional in nature and subject to change upon the completion of the final valuation of such elements.

During the year ended December 31, 2018, the Company completed an acquisition of certain assets of Washington, DC 
based mechanical, electrical, plumbing, and fire protection design company, JVP Engineers, P.C.  The consideration  consisted 
of $2,326, of which, $1,901 has been paid to date. The remaining balance is attributed to a contingent consideration holdback 
related to the collection of certain receivables and will be be paid 15 months from the completion of the acquisition. No debt 
was assumed or cash acquired in the transaction. The pro-forma effects of this acquisition on the Company’s operations are not 
material. During the year ended December 31, 2018, the Company had a measurement period adjustment of $197, which was 
recorded as a reduction to goodwill.

During the year ended December 31, 2018, the Company completed an acquisition of certain assets of the Hawaii-based 
building science and design engineering consulting firm, Chelsea Group Limited.  The consideration consisted of $1,691 of 
cash and potential contingent consideration of up to $2,000 based upon meeting certain future revenue targets over the next 5 
years.  The final purchase price is subject to a net working capital adjustment, dependent on the level of working capital at the 
acquisition date, that has not been finalized yet. The fair value of the contingent consideration was $555 as of the date of 
acquisition. No debt was assumed or cash acquired in the transaction. The pro-forma effects of this acquisition on the 
Company’s operations are not material. The value of the contingent consideration increased by $44 during the year ended 
December 31, 2018 to a ending balance of $599 as of December 31, 2018. See Note 17 for additional information on the of the 
contingent consideration. 

In January 2017, the Company acquired two solar PV projects currently under construction as well as associated 
construction loan agreements with a bank for use in providing non-recourse financing for these acquired solar PV projects 
currently under construction. The Company paid $2,409 to acquire the assets under construction, and assumed $5,635 of 
associated non-recourse financing.

In December 2016, the Company acquired a solar PV project currently under construction as well as an associated 
construction loan agreement with a bank for use in providing non-recourse financing for this acquired solar PV project 
currently under construction. The Company paid $3,575 to acquire the asset under construction, and assumed $9,503 of 
associated non-recourse financing.

A summary of the cumulative consideration paid and the allocation of the purchase price of all of the acquisitions in each 

respective year is as follows: 

76 
AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Accounts receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Prepaid expenses and other current assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property and equipment and energy assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intangibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Purchase price . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Total, net of cash received. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Debt assumed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Total fair value of consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

2018

2017

2016

1,015 $
12
—
680
2,845
67
4,619 $
4,619 $
— $
4,619 $

— $
256
7,788
—
—
—
8,044 $
8,044 $
5,635 $
2,409 $

—
263
12,815
—
—
—
13,078
13,078
9,503
3,575

The results of the acquired assets since the dates of the acquisitions have been included in the Company’s operations as 
presented in the accompanying consolidated statements of income (loss), consolidated statements of comprehensive income 
(loss) and consolidated statements of cash flows.

 For the years ended December 31, 2018, in order to expand its portfolio of energy assets, the Company 

acquired twelve solar projects from two separate developers and is under definitive agreement to acquire six additional solar 
projects. The Company has concluded that in accordance with ASC 805, Business Combinations, these acquisitions did not 
constitute a business as the assets acquired in each case could be considered a single asset or group of similar assets that made 
up substantially all of the fair market value of the acquisitions. See Note 7 for additional disclosures on these asset acquisitions. 

5. GOODWILL AND INTANGIBLE ASSETS

The changes in the carrying value of goodwill attributable to each reportable segment are as follows:

U.S. Regions

U.S. Federal

Canada

Other

Total

Balance, December 31, 2016 . . . . . . . . . . . . . . . . . . . $
Sale of assets of a business . . . . . . . . . . . . . . . . . . . .
Currency effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance, December 31, 2017 . . . . . . . . . . . . . . . . . . .
Goodwill acquired during the year . . . . . . . . . . . . . .
Currency effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance, December 31, 2018 . . . . . . . . . . . . . . . . . . . $
Accumulated Goodwill Impairment Balance,
December 31, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . $
Accumulated Goodwill Impairment Balance,
December 31, 2018 . . . . . . . . . . . . . . . . . . . . . . . . . . $

$

24,759
—
—
24,759

1,611

—

$

3,375
—
—
3,375

1,234

—

26,370

$

4,609

$

3,262
—
232
3,494

—
(277)
3,217

$

$

26,580
(2,639)
566
24,507

—
(371)
24,136

$

$

57,976
(2,639)
798
56,135

2,845
(648)
58,332

— $

— $

(1,016) $

— $

(1,016)

— $

— $

(1,016) $

— $

(1,016)

In accordance with ASC 350, goodwill was tested for impairment as of December 31, 2018, 2017 and 2016 at the reporting 

unit level under the income approach which uses, in part, a discounted cash flow method and a peer-based, and a risk-adjusted 
weighted average cost of capital. No impairment was recorded in the December 31, 2018, 2017 or 2016 assessments. Based on 
the Company’s goodwill impairment assessment, all of its reporting units with goodwill had estimated fair values as of 
December 31, 2018 that exceeded their carrying values by at least 20%.  

Based on the Company’s goodwill impairment assessment, all of its reporting units with goodwill had estimated fair values 

as of December 31, 2017 that exceeded their carrying values by at least 20%. However, during the course of the valuation 
analysis it was determined that although the fair value of the Company’s Canada reporting unit exceeded the carrying amount 
of this reporting unit, the carrying value of the reporting unit was negative as of  December 31, 2017.  The Canada reporting 
unit had goodwill of $3,494 as of December 31, 2017.

The gross carrying amount and accumulated amortization of intangible assets are as follows:

77AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

As of December 31,

2018

2017

Gross Carrying Amount
Customer contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Customer relationships. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-compete agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trade names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accumulated Amortization
Customer contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer relationships. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-compete agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trade names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7,818

$

12,082

3,013

2,710

541

26,164

7,668

10,302

3,013

2,651

526
24,160

Intangible assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

2,004

$

7,786

11,863

3,052

2,751

546

25,998

7,786

9,557

3,048

2,642

525
23,558

2,440

Amortization expense related to customer contracts is included in cost of revenues in the consolidated statements of 
income (loss).  Amortization expense related to customer relationships, non-compete agreements, technology and trade names 
is included in selling, general and administrative expenses in the consolidated statements of income (loss). 

Customer contracts are amortized ratably over the period of the acquired customer contracts ranging in periods from 
approximately one to eight years.  All other intangible assets are amortized over periods ranging from approximately four to 
fifteen years, as defined by the nature of the respective intangible asset.

Separable intangible assets that are not deemed to have indefinite lives are amortized over their useful lives. The Company 

annually assesses whether a change in the life over which the Company’s assets are amortized is necessary or more frequently 
if events or circumstances warrant. No changes to useful lives were made during the years ended December 31, 2018, 2017 and 
2016.

Amortization expense for the years ended December 31, 2018, 2017 and 2016 is as follows:

Customer contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Customer relationships. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-compete agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trade names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total intangible amortization expense . . . . . . . . . . . . . . . . . . . . . . . . . . . $

2018

Year Ended December 31,
2017

2016

30
973
3
47
4
1,057

$

$

31
1,244
42
128
6
1,451

$

$

184
1,809
116
238
11
2,358

Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years is as follows:

78AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2023 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Estimated Amortization
Included in Selling,
General and
Administrative Expenses
844
620
247
75
66
152
2,004

$

6. PROPERTY AND EQUIPMENT

Property and equipment consists of the following:

December 31,

2018

2017

Furniture and office equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Computer equipment and software costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automobiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Land . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property and equipment, gross . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less - accumulated depreciation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

6,118
23,781
3,990
1,373
1,454
36,716
(29,731)
6,985

$

$

5,846
21,457
3,255
1,181
1,498
33,237
(27,934)
5,303

Depreciation expense on property and equipment for the years ended December 31, 2018, 2017 and 2016 was $2,167, 

$2,394 and $3,020, respectively, and is included in selling, general and administrative expenses in the accompanying 
consolidated statements of income (loss).

7. ENERGY ASSETS

Energy assets consist of the following: 

Energy assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Less - accumulated depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

619,708   $
(159,756)
459,952   $

488,818
(132,375)
356,443

December 31,

2018

2017

Included in energy assets are capital lease assets and accumulated depreciation of capital lease assets.  Capital lease assets 

consist of the following: 

Capital lease assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Less - accumulated depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital lease assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

December 31,

2018

2017

42,402   $
(4,139)
38,263   $

38,725
(2,049)
36,676

Depreciation and amortization expense on the above energy assets, net of deferred grant amortization, for the years ended 
December 31, 2018, 2017 and 2016 was $27,305, $21,648 and $19,377, respectively, and is included in cost of revenues in the 
accompanying consolidated statements of income (loss). Included in these depreciation and amortization expense totals are 

79AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

depreciation and amortization expense on capital lease assets of $2,090, $1,305 and $570 for the years ended December 31, 
2018, 2017 and 2016, respectively.

For the years ended December 31, 2018, in order to expand its portfolio of energy assets and in connection with the 

adoption of ASU 2017-01, the Company acquired numerous energy projects, which did not constitute businesses under the new 
guidance. The Company acquired and closed on twelve solar projects, and entered into a definitive agreement to purchase six 
additional solar projects, from two developers for a total purchase price of $72,921. The purchase price included deferred 
consideration of $5,437 that will be paid upon final completion of the respective projects and throughout 2019.  As of 
December 31, 2018, the Company has paid $62,116 to the developers of the projects. 

 As of December 31, 2018, the Company had $897 in ARO assets recorded in project assets and $897 in ARO liabilities 

recorded in accrued expenses and other current liabilities and other liabilities.  As of December 31, 2017 the Company had 
immaterial ARO obligations. The Company’s current ARO liabilities relate to the removal of equipment and pipelines at certain 
renewable gas projects and obligations related to the decommissioning of certain solar facilities. 

80AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

8. LONG-TERM DEBT

Long-term debt comprised the following:

Commencement
Date

Maturity Date

Acceleration 
Clause(2)

Rate as of
December
31,

Balance as of December
31,

2018

2018

2017

4.710% $ 43,074

$ 49,986

936

1,220

NA

NA

NA

NA

Yes

Yes

Yes

6.110%

7.250%

4.797%

5.047%

June 2020

June 2024

June 2020

June 2028

March 2021

February 2021

Senior secured credit facility, interest at
varying rates monthly in arrears . . . . . . . . . . June 2015
Variable rate term loan payable in semi-
annual installments . . . . . . . . . . . . . . . . . . . . January 2006
Variable rate term loan payable in semi-
annual installments . . . . . . . . . . . . . . . . . . . . January 2006
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . February 2009 December 2024
Term loan payable in quarterly installments . March 2011
Term loan payable in monthly installments. . October 2011
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . October 2012
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . September 2015 March 2023
Term loan payable in quarterly installments . August 2016
Term loan payable in quarterly installments . March 2017
Term loan payable in monthly installments(3) April 2017
Term loan payable in quarterly installments . April 2017
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . June 2017
Variable rate term loan payable in quarterly
installments . . . . . . . . . . . . . . . . . . . . . . . . . . February 2018 August 2022
Term loan payable in quarterly installments . June 2018
Variable rate term loan payable in semi-
annual installments . . . . . . . . . . . . . . . . . . . . June 2018
June 2033
Variable rate construction loan payable. . . . . November 2016 June 2018
Variable rate term loan payable in monthly/
quarterly installments . . . . . . . . . . . . . . . . . . October 2018
5.020%
Capital leases(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 2038

December 2027

February 2034

October 2029

March 2028

April 2027

July 2031

4.847%

5.610%

4.950%

5.000%

Yes

Yes

Yes

Yes

NA

NA

NA

NA

NA

NA

NA

NA

NA

6.297% 30,674

5.297% 17,208

4.500% 22,081

5.247% 12,915

10.297% 21,475

5.150% 30,069

7,426

—

1,464

3,843

3,925

3,945

2,735

9,668

—

9,072

33,363
253,873
26,890
Less - current maturities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less - deferred financing fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7,821
Long-term debt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $219,162

8,295

8,757

2,218

4,551

32,711

18,346

4,605

4,258

13,325

3,128

14,034

—

—

—

1,721

—

35,013
202,168
22,375
6,556
$173,237

(1)Capital leases do not include approximately $25,305 in future interest payments
(2)These agreements have acceleration causes that, in the event of default, as defined, the payee has the option to accelerate
payment terms and make due the remaining principal and the required interest balance according to the agreement
(3)As of December 31, 2018, this construction loan has an additional $2,742 commitment that could be drawn upon

Aggregate maturities of long-term debt for the years ended December 31, are as follows:

81AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2023 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Debt Discount. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

26,890
85,685
18,573
27,810
27,518
69,955
(2,558)
253,873

Senior Secured Credit Facility - Revolver and Term Loan

On June 30, 2015, the Company entered into a third amended and restated bank credit facility with two banks. The new 

credit facility replaces and extended the Company’s existing credit facility, which was scheduled to expire in accordance with 
its terms on June 30, 2016. The revolving credit facility and term loan mature on June 30, 2020, when all amounts will be due 
and payable in full. The Company expects to use the new credit facility for general corporate purposes of the Company and its 
subsidiaries, including permitted acquisitions, refinancing of existing indebtedness and working capital. In July 2016, the 
Company entered into an amendment to the third amended and restated bank credit facility that amended the requirement of the 
total funded debt to EBITDA ratio, as defined. In November 2016, the Company entered into an additional amendment to the 
third amended and restated bank credit facility that increased the amount of the term loan under the credit facility by 
approximately $20,000 to an aggregate of $30,000 and extends the maturity date of the term loan from June 30, 2018 to June 
30, 2020.  In June 2017, the Company entered into an additional amendment to the third amended and restated bank credit 
facility that increased the amount available to be drawn on the revolving credit facility from $60,000 to $75,000. This 
amendment also amended the requirement of the total funded debt to EBITDA ratio, as defined, described below. In June 2018, 
the Company entered into an additional amendment to the Third Amended and Restated bank credit facility. The amendment 
added an additional lender, increased the aggregate amount of the revolving commitments from $75,000 to $85,000 through the 
existing June 30, 2020 end date, increased the term loan from $25,000 to $46,000 to reduce the outstanding revolving loan 
balances by the same amount and, for the period of June 30, 2018 through June 30, 2020, increased the Total Funded Debt to 
EBITDA covenant ratio, as defined, from a maximum of 2.75 to 3.00.  The total commitment under the amended credit facility 
(revolving credit, term loan and swing line) is $136,000.

The credit facility consists of a $85,000 revolving credit facility and a $46,000 term loan. The revolving credit facility may 

be increased by up to an additional $25,000 at the Company’s option if lenders are willing to provide such increased 
commitments, subject to certain conditions. Up to $20,000 of the revolving credit facility may be borrowed in Canadian 
dollars, Euros or pounds sterling. The Company is the sole borrower under the credit facility. The obligations under the credit 
facility are guaranteed by certain of the Company’s direct and indirect wholly owned domestic subsidiaries and are secured by 
a pledge of all of the Company’s and such subsidiary guarantors’ assets, other than the equity interests of certain subsidiaries 
and assets held in non-core subsidiaries (as defined in the agreement). At December 31, 2018 and 2017, $41,500 and $22,500, 
excluding debt discounts, was outstanding under the term loan, respectively. At December 31, 2018 and 2017, $1,696 and 
$27,580, excluding debt discounts, was outstanding under the revolving credit facility, respectively.  At December 31, 2018 
funds of $72,234 is available for borrowing under the revolving credit facility. At December 31, 2018, the Company had 
$11,070 in letters of credit outstanding.

The interest rate for borrowings under the credit facility is based on, at the Company’s option, either (1) a base rate equal 

to a margin of 0.5% or 0.25%, depending on the Company’s ratio of Total Funded Debt to EBITDA (as defined in the 
agreement), over the highest of (a) the federal funds effective rate, plus 0.50% , (b) Bank of America’s prime rate and (c) a rate 
based on the London interbank deposit rate (“LIBOR”) plus 1.50%, or (2) the one-, two- three- or six-month LIBOR plus a 
margin of 2.00% or 1.75%, depending on the Company’s ratio of Total Funded Debt to EBITDA, as defined. A commitment fee 
of 0.375% is payable quarterly on the undrawn portion of the revolving credit facility. At December 31, 2018, the interest rate 
for borrowings under the revolving credit facility was 4.52% and the weighted average interest rate for borrowings under the 
term loan was 4.72%.

The revolving credit facility does not require amortization of principal. The term loan requires quarterly principal 
payments of $1,500, with the balance due at maturity. All borrowings may be paid before maturity in whole or in part at the 
Company’s option without penalty or premium, other than reimbursement of any breakage and deployment costs in the case of 
LIBOR borrowings.

82AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

The credit facility limits the Company’s and its subsidiaries’ ability to, among other things: incur additional indebtedness; 

incur liens or guarantee obligations; merge, liquidate or dispose of assets; make acquisitions or other investments; enter into 
hedging agreements; pay dividends and make other distributions and engage in transactions with affiliates, except in the 
ordinary course of business on an arms’ length basis.

Under the credit facility, the Company and its subsidiaries may not invest cash or property in, or loan to, the Company’s 
non-core subsidiaries in aggregate amounts exceeding 49% of the Company’s consolidated stockholders’ equity. In addition, 
under the credit facility, the Company and its core subsidiaries must maintain the following financial covenants:

a ratio of total funded debt to EBITDA, as defined, of less than 3.0 to 1.0 as of the end of each fiscal quarter ending
June 30, 2018 and thereafter; and

a debt service coverage ratio (as defined in the agreement) of at least 1.5 to 1.0.

•

•

Any failure to comply with the financial or other covenants of the credit facility would not only prevent the Company from 

being able to borrow additional funds, but would constitute a default, permitting the lenders to, among other things, accelerate 
the amounts outstanding, including all accrued interest and unpaid fees, under the credit facility, to terminate the credit facility, 
and enforce liens against the collateral.

The credit facility also includes several other customary events of default, including a change in control of the Company, 

permitting the lenders to accelerate the indebtedness, terminate the credit facility, and enforce liens against the collateral.

For purposes of the Company’s senior secured facility: EBITDA, as defined, excludes the results of certain renewable 
energy projects that the Company owns and for which financing from others remains outstanding; total funded debt, as defined, 
includes amounts outstanding under both the term loan and revolver portions of the senior secured credit facility plus other 
indebtedness, but excludes non-recourse indebtedness of project company subsidiaries; and debt service, as defined, includes 
principal and interest payments on the indebtedness included in total funded debt other than principal payments on the revolver 
portion of the facility.

February 2018 Term Loan

In February 2018, the Company entered into a credit agreement for gross proceeds of $28,500, with a bank for use in 
providing non-recourse financing for a new renewable natural gas energy asset at a rate of 7.5% above LIBOR. Principal and 
interest amounts are due in quarterly installments. The term loan matures on August 31, 2022 with all remaining unpaid 
amounts outstanding under the agreement due at that time. At December 31, 2018, $21,475, net of debt discount, was 
outstanding under the term loan. The interest rate at December 31, 2018 was 10.297%.

June 2018 Term Loan

In June 2018, the Company entered into a non-recourse term loan with a bank, with an original principal amount of 

$12,407. In August 2018, the Company entered into a joinder agreement which increased the principal amount by an additional 
$19,252, for a total principal amount of $31,659. The loan bears interest at a fixed rate of 5.15%. The principal and interest 
payments are due in quarterly installments and the loan matures on December 31, 2038, with all remaining unpaid amounts 
outstanding under the agreement due at that time. These agreements contain interest make-whole provisions that the Company 
determined qualified as embedded derivatives that are required to be bifurcated and valued separately from the host contract.  
See Notes 8 and 9 for additional discussions. At December 31, 2018,  $30,069 was outstanding under the term loan, including 
debt discounts and the make-whole interest provision derivatives.   

June 2018 Variable Note

In June 2018, the Company entered into a loan agreement for use in providing non-recourse financing for a solar PV 
project in operation. The loan agreement provides for a $10,000 term loan credit facility and bears interest at a variable rate, 
with interest payments due in semi-annual installments. The term loan matures on June 15, 2033, with all remaining unpaid 
amounts outstanding under the facility due at that time. At December 31, 2018, $9,668, net of debt discounts, was outstanding 
under the term loan. The variable interest rate for this loan at December 31, 2018 was 4.847%. 

October 2018 Term Loan

        In October 2018, the Company entered into a non-recourse term loan with a bank, with an original principal amount of 
$9,200. The loan bears interest at a rate of 2.5% above LIBOR. Interest is due monthly in the first year of the loan and then 

83AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

principal and interest payments are due in quarterly installments. the loan matures on October 18, 2029, with all remaining 
unpaid amounts outstanding under the agreement due at that time. At December 31, 2018,  $9,072 was outstanding under the 
term loan, including debt discounts.   

The Company’s project financing facilities contain various financial and other covenant requirements which include debt 

service coverage ratios and total funded debt to EBITDA, as defined. Any failure to comply with the financial or other 
covenants of the Company’s projects financings would result in inability to distribute funds to from the wholly-owned 
subsidiary to the Company or constitute an event of default in which the lenders may have the ability to accelerate the amounts 
outstanding, including all accrued interest and unpaid fees. 

As of December 31, 2018, the Company was not in compliance with certain financial covenant requirements on two of the 
Company’s project financing debt facilities. The Company has received a waiver from one of the financial institutions to waive 
the failure as of December 31, 2018. The Company has not received a waiver from one financial institution in relation to the 
covenant failure on a project financing facility for which $3,978 was outstanding as of December 31, 2018. 

9. INCOME TAXES

The components of income before income taxes are as follows: 

Domestic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income before (benefit) provision for income taxes . . . . . . . . . . . . . . . . $

46,542
(4,152)
42,390

$

$

29,792
(1,075)
28,717

$

$

19,874
(3,507)
16,367

The components of the (benefit) provision for income taxes are as follows: 

2018

Year Ended December 31,
2017

2016

Current:
   Federal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
   State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
   Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deferred:
   Federal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
   State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
   Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

2018

Year Ended December 31,
2017

2016

(1,888) $
1,176

30
(682)

2,662

2,530

303

5,495

4,813

$

(1,055) $
671

161
(223)

(6,683)
1,853

262
(4,568)
(4,791)   $

1,304

303
(106)
1,501

2,341

106

422

2,869

4,370

The Company’s deferred tax assets and liabilities result primarily from temporary differences between financial reporting 

and tax recognition of depreciation, energy efficiency and NOL carryforwards.

84AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Deferred tax assets and liabilities consist of the following:

Deferred tax assets:
Compensation accruals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net operating losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest rate swaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred revenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gross deferred income tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total deferred income tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Deferred tax liabilities:
Depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Deferred effect of derivative liability and ASU 2016-09 adoption . . . . . . . . . . . . . . . . . . .
Canadian capital cost, allowance and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
United Kingdom goodwill amortization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside basis difference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total deferred income tax liabilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income tax liabilities, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

December 31,

2018

2017

$

3,489

2,940

127

10,010

666

28,911

3,292

1,943

51,378
(7,931)
43,447

$

(37,107)   $
(475)
(1,974)
(755)
(7,488)
—
(47,799)
(4,352)   $

3,042

2,149

—

10,099

866

22,716

—

815

39,687
(7,534)
32,153

(24,178)
—
(3,156)
(802)
(4,408)
(193)
(32,737)
(584)

The Company recorded a valuation allowance in the amount of $7,931 and  $7,534 as of December 31, 2018 and 2017, 
respectively, related to the following items: 1) The Company recorded a valuation allowance on a deferred tax asset relating to 
interest rate swaps in the amount of $184 and $401 as of December 31, 2018 and 2017, respectively. The deferred tax asset 
represents a future capital loss which can only be recognized for income tax purposes to the extent of capital gain 
income. Although the Company anticipates sufficient future taxable income, it is more likely than not that it will not be of the 
appropriate character to allow for the recognition of the future capital loss. 2) As of December 31, 2018 and 2017, the 
Company recorded a valuation allowance on a deferred tax asset relating to a foreign net operating loss in the amount of $7,500 
and $6,871, respectively. It is more likely than not that the Company will not generate sufficient taxable income at the foreign 
subsidiary level to utilize the net operating loss. 3) The Company recorded a valuation allowance on a deferred tax asset 
relating to a state net operating loss of $247 and $262 at one of its subsidiaries as of December 31, 2018 and 2017, respectively. 
It is more likely than not that the Company will not generate sufficient taxable income at the subsidiary level to utilize the net 
operating loss.

The provision for income taxes is based on the various rates set by federal and local authorities and is affected by 

permanent and temporary differences between financial accounting and tax reporting requirements.

85AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

The following is a reconciliation of the effective tax rates:

Income before (benefit) provision for income taxes . . . . . . . . . . . . . . . . $
Federal statutory tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
State income taxes, net of Federal benefit . . . . . . . . . . . . . . . . . . . . . . . .
Net state impact of deferred rate change . . . . . . . . . . . . . . . . . . . . . . . . .
Non deductible expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impact of reserve for uncertain tax positions . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy efficiency preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign items and rate differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tax rate change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

Effective tax rate:
Federal statutory rate expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State income taxes, net of Federal benefit . . . . . . . . . . . . . . . . . . . . . . . .
Net state impact of deferred rate change . . . . . . . . . . . . . . . . . . . . . . . . .
Non deductible expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impact of reserve for uncertain tax positions . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy efficiency preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign items and rate differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tax rate change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valuation allowance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2018
42,390
8,902
3,071
174
982
879
(441)
(8,636)
(41)
—
641
(718)
4,813

$
$

$
$

Year Ended December 31,
2017
28,717
10,048
1,584
327
1,473
42
116
(6,416)
139
(13,948)
424
1,420
(4,791)

$

$

21.0 %
7.2 %
0.4 %
2.3 %
2.1 %
(1.0)%
(20.4)%
(0.1)%
— %
1.5 %
(1.6)%
11.4 %

35.0 %
5.5 %
1.1 %
5.1 %
0.1 %
0.4 %
(22.3)%
0.5 %
(48.6)%
1.5 %
4.9 %
(16.7)%

2016
16,367
5,728
678
(110)
670
(411)
306
(4,130)
516
—
213
910
4,370

35.0 %
4.1 %
(0.7)%
4.1 %
(2.5)%
1.9 %
(25.2)%
3.2 %
— %
1.3 %
5.5 %
26.7 %

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:

Year Ended December 31,
2017
2018

Balance, beginning of year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Additions for current year tax positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additions for prior year tax positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settlements paid to tax authorities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reductions of prior year tax positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance, end of year . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

600
300
900
—
(200)
1,600

$

$

600

—
—
—
600

At December 31, 2018 and 2017, the Company had approximately $1,600 and $600, respectively, of total gross 

unrecognized tax benefits.

Of the total gross unrecognized tax benefits as of December 31, 2018 and 2017, $705 and $80, respectively, (both net of 
the federal benefit on state amounts) represent the amount of unrecognized tax benefits that, if recognized, would favorably 
affect the effective income tax rate in any future periods.

At December 31, 2018 the Company had a federal net operating loss carryforwards of approximately $7,200 which has an 
indefinite life, state net operating loss carryforwards of approximately $23,340, which will expire from 2018 through 2034 and 

86AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

an interest deduction carryforward of approximately $12,300 which has an indefinite life. At December 31, 2018 the Company 
had Canadian net operating loss carryforwards of approximately $25,000, which will expire for tax years 2018 through 2028.

 The Company does not accrue U.S. tax for foreign earnings that it considers to be permanently reinvested outside the 
United States. Consequently, the Company has not provided any withholding tax on the unremitted earnings of its foreign 
subsidiaries. As of December 31, 2018, the amount of earnings for which no repatriation tax has been provided is estimated to 
be $0.

At December 31, 2018 the company had a federal tax credit carryforward of approximately $28,300 which will expire at 

various times through 2038.

The tax years 2015 through 2018 remain open to examination by major taxing jurisdictions. The Company accounts for 
interest and penalties related to uncertain tax positions as part of its provision for federal and state income taxes. The (decrease) 
increase included in tax expense for the years end December 31, 2018, 2017 and 2016 were $(50), $(60) and $(20), 
respectively.

The 2017 Tax Cuts and Jobs Act (the “2017 Tax Act”) was signed into law on December 22, 2017and was effective for tax 

years beginning after December 31, 2017. The 2017 Tax Act significantly revised the U.S. corporate income tax by, among 
other things, lowering the statutory corporate tax rate from 35% to 21%, eliminating certain deductions, imposing a mandatory 
one-time tax on accumulated earnings of foreign subsidiaries as of December 31, 2017, introducing new tax regimes, and 
changing how foreign earnings are subject to U.S. tax. The 2017 Tax Act also enhanced and extended through 2026 the option 
to claim accelerated depreciation deductions on qualified property and created limitations on the deductibility and timing of 
interest deductions. The Company recorded a tax benefit for the impact of the 2017 Tax Act of approximately $13,900, in its 
consolidated financial statements for the year ending December 31, 2017. This amount was primarily comprised of the 
remeasurement of federal net deferred tax liabilities resulting from the permanent reduction in the U.S. statutory corporate tax 
rate from 35% to 21%. 

The Tax 2017 Tax Act  provided for a one-time deemed mandatory repatriation for post-1986 undistributed foreign 

subsidiary earnings and profits (“E&P”) through the year ended December 31, 2017.  The Company’s initial estimate 
showed a deficit in foreign E&P and significant foreign taxes paid, which could be creditable against any tax resulting from 
the deemed mandatory repatriation. During 2018 the Company concluded that it’s foreign E&P were in a deficit position 
and the Company had no tax due in connection with the deemed mandatory repatriation.

On December 22, 2017, the SEC staff issued Staff Accounting Bulletin No. 118 to address the application of U.S. 
GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including 
computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Legislation. The 
Company recognized the provisional tax impacts related to the revaluation of deferred tax assets and liabilities and included 
these amounts in its consolidated financial statements for the year ended December 31, 2017. As of December 31, 2018 the 
Company has finalized it’s accounting for the 2017 Tax Act with no material adjustments and all the impacts are reflected in 
the consolidated financial statements as of that date.   

In February 2018, as part of the Bipartisan Budget Act, Code Section 179D Commercial Buildings Energy Efficiency 
Tax Deduction was retroactively extended through December 31, 2017. Because of the timing of the retroactive extension 
the impact was not reflected in the Company’s effective tax rate for 2017 but was included as a tax benefit in the Company’s 
tax provision for the year ending December 31, 2018.

10. INVESTMENT FUNDS

In each of September 2015, June 2017, June 2018 and October 2018, the Company formed an investment fund with a

different third party investor which granted the applicable investor ownership interests in the net assets of certain of the 
Company’s renewable energy project subsidiaries. The Company currently has four such investment funds each with a different 
third party investor.

The Company consolidates the investment funds, and all inter-company balances and transactions between the Company 
and the investment funds are eliminated in its consolidated financial statements. The Company determined that the investment 
funds meet the definition of a VIE. The Company uses a qualitative approach in assessing the consolidation requirement for 
VIEs that focuses on determining whether the Company has the power to direct the activities of the VIE that most significantly 
affect the VIE’s economic performance and whether the Company has the obligation to absorb losses or the right to receive 
benefits that could potentially be significant to the VIE.

87AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

The Company has considered the provisions within the contractual arrangements that grant it power to manage and make 

decisions that affect the operation of these VIEs, including determining the solar energy systems and associated long term 
customer contracts to be sold or contributed to the VIEs, and installation, operation and maintenance of the solar energy 
systems. The Company considers that the rights granted to the other investors under the contractual arrangements are more 
protective in nature rather than participating rights. As such, the Company has determined it is the primary beneficiary of the 
VIEs for all periods presented. The Company evaluates its relationships with VIEs on an ongoing basis to ensure that it 
continues to be the primary beneficiary.

Under the related agreements, cash distributions of income and other receipts by the funds, net of agreed-upon expenses 

and estimated expenses, tax benefits and detriments of income and loss, and tax benefits of tax credits, are assigned to the 
funds’ investor and Company’s subsidiaries as specified in contractual arrangements. Certain of these arrangements have call 
and put options to acquire the investor’s equity interest as specified in the contractual agreements. See Note 11 for additional 
information on the call and put options.

A summary of amounts related to the investment funds in the Company’s consolidated balance sheets for the years ending 

December 31, 2018 and 2017 is as follows:

2018(1)

2017(1)

Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Restricted cash. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts receivable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Costs and estimated earnings in excess of billings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses and other current assets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current portions of long-term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long-term debt, net of deferred financing costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other long-term liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,255 $
156
374
498
190
122,641
1,613
234
4,146
—
1,712
26,461
2,131

444
155
328
360
8
55,712
1,398
764
74
75
—
—
—

(1)The amounts in the above table are reflected in parenthetical references on the Company’s consolidated balance sheet. See the
Company’s consolidated balance sheet for additional information.

11.  NON-CONTROLLING INTERESTS AND EQUITY

Redeemable Non-controlling Interest

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the third quarter of 

2015 has the right, beginning on the fifth anniversary of the final funding of the variable rate construction and term loans due 
2023 and extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to 
the Company’s wholly owned subsidiary (the “Call Option”). The Company’s investment fund, which was formed in the third 
quarter of 2015, also includes a right, beginning on the sixth anniversary of the final funding and extending for one year, for the 
non-controlling interest holder to elect to require the Company’s wholly owned subsidiary to purchase all of its membership 
interests in the fund  (the “Put Option”).

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the second quarter 

of 2017 has the right, beginning on the fifth anniversary of the final funding of the non-controlling interest holder and extending 
for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly 
owned subsidiary, a call option. The Company’s investment fund formed in the second quarter of 2017 also includes a right, 
beginning on the sixth anniversary of the final funding and extending for one year, for the non-controlling interest holder to 
elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option. 

88AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the second quarter 

of 2018 has the right, beginning on the fifth anniversary of the investment fund’s final project being placed into service and 
extending for six months, to elect to require the non-controlling interest holder to sell all of its membership units to the 
Company’s wholly owned subsidiary, a call option. The Company’s investment fund formed in the second quarter of 2018 also 
includes a right, upon the expiration of the call option and extending for six months, for the non-controlling interest holder to 
elect to require the Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The Company’s wholly owned subsidiary with a membership interest in the investment fund formed in the fourth quarter of 
2018 has the right, beginning on the fifth anniversary on the last projects placed in-service date and extending for six months, to 
elect to require the non-controlling interest holder to sell all of its membership units to the Company’s wholly owned 
subsidiary, a call option. The Company’s investment fund formed in the fourth quarter of 2018 also includes a right, upon the 
expiration of the call option and extending for six months, for the non-controlling interest partner to elect to require the 
Company’s wholly owned subsidiary to purchase all of its membership interests in the fund, a put option.

The purchase price for two of the investment funds investors’ interests under the call options is equal to the fair market 

value of such interest at the time the option is exercised. The purchase price for the other two investment funds investor’s 
interests under the call options is equal to the greater of (i) the fair market value of such interests at the time the option is 
exercised or (ii) 7% of the investors’ contributed capital balance at the time the option is exercisable. The call options are 
exercisable beginning on the date that specified conditions are met for each respective fund. None of the call options are 
expected to become exercisable prior to 2021. 

The purchase price for two of the funds investors’ interests in the investment funds under the put options is the lessor of 

fair market value at the time the option is exercised and a specified amount, ranging from $659 - $917. The purchase price for 
the other two of the fund investors’ interest in the investment funds under the put options is the sum of (i) the fair market value 
at the time the option is exercised, and (ii) the closing costs incurred by the investor in connection with the exercise of the put 
option.  The put options for the investment funds are exercisable beginning on the date that specified conditions are met for 
each respective fund. The put options are not expected to become exercisable prior to 2022.

Because the put options represents redemption features that are not solely within the control of the Company, the non-
controlling interests in these funds are presented outside of permanent equity. Redeemable non-controlling interests are reported 
using the greater of their carrying value at each reporting date (which is impacted by attribution under the HLBV method) or 
their estimated redemption value in each reporting period. At both December 31, 2018 and 2017, redeemable non-controlling 
interests were reported at their carrying value of $14,719 and $10,338, respectively, as the carrying value at each reporting 
period was greater than the estimated redemption value.

12. STOCK INCENTIVE PLAN

Common and Preferred Stock

The Company has authorized 500,000 shares of Class A common stock, par value $0.0001 per share, 144,000 shares of 
Class B common stock, par value $0.0001 per share, and 5,000,000 shares of Preferred Stock, par value $0.0001 per share. The 
rights of the holders of the Company’s Class A common stock and Class B common stock are identical, except with respect to 
voting and conversion. Each share of the Company’s Class A common stock is entitled to one vote per share and is not 
convertible into any other shares of the Company’s capital stock. Each share of the Company’s Class B common stock is 
entitled to five votes per share, is convertible at any time into one share of Class A common stock at the option of the holder of 
such share and will automatically convert into one share of Class A common stock upon the occurrence of certain specified 
events, including a transfer of such shares (other than to such holder’s family members, descendants or certain affiliated 
persons or entities). The Company’s Board of Directors is authorized to fix the rights and terms for any series of preferred stock 
without additional shareholder approval.

In 2000, the Company’s Board of Directors approved the Company’s 2000 Stock Incentive Plan (the “2000 Plan”) and 

between 2000 and 2010 authorized the Company to reserve a total of 28,500 shares of its then authorized common stock, par 
value $0.0001 per share (”Common Stock”) for issuance under the 2000 Plan. The 2000 Plan provided for the issuance of 
restricted stock grants, incentive stock options and nonqualified stock options. The Company will grant no further stock options 
or restricted awards under the 2000 Plan.

The Company’s 2010 Stock Incentive Plan (the “2010 Plan”), was adopted by the Company’s Board of Directors in May 

2010 and approved by its stockholders in June 2010. The 2010 Plan provides for the grant of incentive stock options, non-

89AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

statutory stock options, performance-based stock options, restricted stock awards and other stock-based awards. Upon its 
effectiveness, 10,000 shares of the Company’s Class A common stock were reserved for issuance under the 2010 Plan.  As of 
December 31, 2018, the Company had granted options to purchase 3,887 shares of Class A common stock under the 2010 Plan.

The Company’s 2017 Employee Stock Purchase Plan ("ESPP") permits eligible employees to purchase up to an aggregate 

of 200 shares of the Company’s Class A common stock. This plan commenced December 1, 2017 and was most recently 
amended on August 2018. The ESPP allows participants to purchase shares of common stock at a 5% discount from the fair 
market value of the stock as determined on specific dates at six-month intervals. During the year ended December 31, 2018, the 
Company issued 51 shares under the ESPP. As of December 31, 2018, the amount that had been withheld from employees for 
future purchases under the ESPP is immaterial.

Stock Option Grants 

The Company has granted stock options to certain employees and directors, including its principal and controlling 
stockholder, under the 2000 Plan. The Company has also granted stock options to certain employees and directors under the 
2010 Plan. At December 31, 2018, 6,833 shares were available for grant under the 2010 Plan.

The following table summarizes the collective activity under the 2000 Plan and the 2010 Plan:

Outstanding at December 31, 2015 . . . . . . . . . . . . . . . . . . . . . . . . .
Granted(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . .
Granted(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2017 . . . . . . . . . . . . . . . . . . . . . . . . .
Granted(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exercised. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outstanding at December 31, 2018 . . . . . . . . . . . . . . . . . . . . . . . . .
Options exercisable at December 31, 2018 . . . . . . . . . . . . . . . . . . .
Expected to vest at December 31, 2018 . . . . . . . . . . . . . . . . . . . . . .

(1) Grants are related to the 2010 Plan.

Number of
Options

Weighted-
Average
Exercise Price
7.740
4.703
3.286
8.154
11.293
7.300
6.061
4.935
6.421
10.157
7.367
10.878
7.367
4.726
9.146
8.050
8.824
6.970

4,139   $
665
(321)
(194)
(318)
3,971
390
(401)
(41)
(85)
3,834
518
(909)
(87)
(51)
3,305
1,926
1,379

$
$
$

Weighted-
Average
Remaining
Contractual
Term

Aggregate
Intrinsic Value

4.99
2.87
7.94

$
$
$

20,120
10,237
9,883

The aggregate intrinsic value of stock options exercised during the years ended December 31, 2018, 2017 and 2016 was

$5,588, $808 and $575, respectively.

During the year ended December 31, 2018, a total of 909 shares were issued upon the exercise of options under the 2000 

and 2010 Plan at an average price of $7.367 per share. Cash received from option exercises under all stock-based payment 
arrangements, net, for the years ended December 31, 2018, 2017 and 2016 was $6,696, $1,977 and $1,054, respectively.

Stock options issued under our 2000 Plan generally expire if not exercised within ten years after the grant date. Under the 
terms of our 2010 stock incentive plan, all options expire if not exercised within ten years after the grant date. During 2011, the 
Company began awarding options which typically vest over a five year period on an annual ratable basis. From time to time, 

90AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

the Company awards options providing for vesting over three years, with one-third vesting on each of the first three 
anniversaries of the grant date. During the year ending December 31, 2016, the Company also awarded options that vest based 
upon the achievement of specific performance goals. If the employee ceases to be employed by the Company for any reason 
before vested options have been exercised, the employee has 90 days to exercise options that have vested as of the date of such 
employee’s termination or they are forfeited.

The Company uses the Black-Scholes option pricing model to determine the weighted-average fair value of options 
granted. The Company will recognize the compensation cost of stock-based awards on a straight-line basis over the vesting 
period of the award.

The determination of the fair value of stock-based payment awards utilizing the Black-Scholes model is affected by the 

stock price and a number of assumptions, including expected volatility, expected life, risk-free interest rate and expected 
dividends. The following table sets forth the significant assumptions used in the model during 2018, 2017 and 2016:

Expected dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk-free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expected life. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,

2018
—%
2.71%-3.00%
43%-45%
6.5 years

2017
—%
1.96%-2.36%
46%
6.5 years

2016
—%
1.16%-1.77%
46%-49%
6.5-10 years

The Company will continue to use judgment in evaluating the expected term and volatility related to the stock-based 
compensation on a prospective basis, and incorporating these factors into the Black-Scholes pricing model. The Company 
records forfeitures as they occur.  Higher volatility and longer expected lives result in an increase to stock-based compensation 
expense determined at the date of grant.

The weighted-average fair value of stock options granted during the years ended December 31, 2018, 2017 and 2016, 

under the Black-Scholes option pricing model was $5.20, $2.93 and $2.60, respectively, per share. For the years ended 
December 31, 2018, 2017 and 2016, the Company recorded stock-based compensation expense of approximately $1,258, 
$1,293, and $1,462, respectively, in connection with stock-based payment awards. The compensation expense is allocated 
between cost of revenues and selling, general and administrative expenses in the accompanying consolidated statements of 
income (loss) based on the salaries and work assignments of the employees holding the options. As of December 31, 2018, 
there was approximately $3,107 of unrecognized compensation expense related to non-vested stock option awards that is 
expected to be recognized over a weighted-average period of 2.1 years.

13. EMPLOYEE BENEFITS

The Company has salary reduction/profit sharing plans under the provisions of Section 401(k) of the Internal Revenue
Code. The plans cover all employees who have completed the minimum service requirement, as defined by the plans. The plans 
require the Company to contribute 100% of the first six percent of base compensation that a participant contributes to the plans. 
Matching contributions made by the Company were $4,957, $3,832 and $4,600 for the years ended December 31, 2018, 2017 
and 2016, respectively.

The Company has a Group Personal Pension Plan (GPPP) for employees in the U.K., established in 2016, whereby eligible 

employees may contribute a portion of their compensation, subject to their age and other limitations established by HM 
Revenue & Customs. The plan requires the Company to contribute 100% of the first six percent of base compensation that a 
participant contributes to the plans. Matching contributions made by the Company were $161, $344 and $202 for the years 
ended December 31, 2018, 2017 and 2016, respectively.

The Company has a Registered Retirement Savings Plan (RRSP) for employees in Canada, whereby eligible employees 
may contribute a portion of their compensation. The plan requires the Company to contribute 100% of the first six percent of 
base compensation that a participant contributes to the plans. Matching contributions made by the Company were $351, $774 
and $307 for the years ended December 31, 2018, 2017 and 2016, respectively.

91AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

14. COMMITMENTS AND CONTINGENCIES

The Company from time to time issues letters of credit and performance bonds, with their third-party lenders, to provide

collateral. 

The Company leases certain administrative offices. The leases are long-term noncancelable real estate lease agreements, 
expiring at various dates through fiscal 2025. The agreements generally provide for fixed minimum rental payments and the 
payment of utilities, real estate taxes, insurance and repairs. Rent and related expenses for the years ended December 31, 2018, 
2017 and 2016 was $6,463, $6,362 and $6,147, respectively. 

The Company’s estimated minimum future lease obligations under operating leases are as follows: 

Year ended December 31,

2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2023 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total minimum lease payments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

7,917
7,265
5,833
5,357
3,873
17,348
47,593

Operating Leases

Legal Proceedings

The Company also is involved in a variety of claims and other legal proceedings generally incidental to its normal business 

activities.  While the outcome of any of these proceedings cannot be accurately predicted, the Company does not believe the 
ultimate resolution of any of these existing matters would have a material adverse effect on its financial condition or results of 
operations.

Commitments as a Result of Acquisitions 

During the the year ended December 31, 2018, the Company completed an acquisition which provided for a $425 cash 
consideration holdback contingent upon the Company collecting certain acquired receivables. The contingent consideration will 
be paid fifteen months from the completion of the acquisition and is recorded in the other liabilities line on the consolidated 
balance sheets.

During the year ended December 31, 2018, the Company completed an acquisition which provided for a revenue earn-out 

contingent upon the acquired business meeting certain cumulative revenue targets over the next five years. The Company 
evaluated financial forecasts of the acquired business and concluded that the fair value of this earn-out was approximately $555 
which was subsequently increased to $599 as of December 31, 2018 and is recorded in the other liabilities on the consolidated 
balance sheets.  The contingent consideration will be paid yearly, commencing in 2020, if any of the cumulative revenue targets 
are achieved and the fair value of the earn-out will be periodically re-evaluated and adjustments will be recorded as needed. See 
Notes 4 and 17 for additional information.

During the year ended December 31, 2018, the Company completed an acquisition of certain lease options, which provided 

for a payout if the lease option is exercised and if certain financial metrics are achieved. The Company evaluated the the 
acquired lease options and concluded that the fair-value of this contingent liability is approximately $363, which is recorded in 
accrued expenses and other current liabilities and other liabilities on the consolidated balance sheets. Payments will be made 
when milestones are achieved. The contingent liability will be periodically re-evaluated and adjustments will be recorded as 
needed. See Note 17 for additional information.

92AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

15. GEOGRAPHIC INFORMATION

The Company attributes revenues to customers based on the location of the customer. Information as to the Company’s

operations in different geographical areas is as follows:

Long-lived assets:

United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 Total long-lived assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

443,385
22,107
1,445
466,937

$

$

343,344
17,082
1,320
361,746

December 31,

2018

2017

Revenues:

United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

734,748
36,728
15,662
787,138

$

$

665,793
42,186
9,173
717,152

$

$

588,791
49,706
12,730
651,227

2018

Year Ended December 31,
2017

2016

16. OTHER EXPENSES, NET

The components of other expenses, net, are as follows:

2018

Year Ended December 31,
2017

2016

Gain on derivatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Interest expense, net of interest income. . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of deferred financing fees, net . . . . . . . . . . . . . . . . . . . . . .
Foreign currency transaction (gain) loss . . . . . . . . . . . . . . . . . . . . . . . . .

Other expenses, net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

(121) $

13,132
1,894
1,804
16,709

$

(271) $
8,086
1,350
(1,294)
7,871

$

(279)
6,510
1,173
5
7,409

Estimated amortization expense for existing deferred financing fees for the next five succeeding fiscal years is as follows:

2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2023 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

Estimated
Amortization

1,774
1,061
781
671
487

17. FAIR VALUE MEASUREMENT

The Company recognizes its financial assets and liabilities at fair value on a recurring basis (at least annually). Fair value 
is defined as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most 
advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. 
Three levels of inputs that may be used to measure fair value are as follows:

Level 1:  Inputs are based upon unadjusted quoted prices for identical instruments traded in active markets. 

Level 2:  Inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or 
similar instruments in markets that are not active, and model based valuation techniques for which all significant assumptions 
are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or 
liabilities. 

93AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Level 3:  Inputs are generally unobservable and typically reflect management’s estimates of assumptions that market 
participants would use in pricing the asset or liability. The fair values are therefore determined using model-based techniques 
that include option pricing models, discounted cash flow models, and similar techniques. 

The following table presents the input level used to determine the fair values of the Company’s financial instruments 

measured at fair value on a recurring basis:

Assets:

Interest rate swap instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commodity swap instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total assets
Liabilities:

Interest rate swap instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commodity swap instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest make-whole provisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contingent consideration liabilities . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities

Level

2018

2017

Fair Value as of December 31,

2
2

2
2
2
3

$

$

$

$

733
33
766

3,187
70
1,808
962
6,027

$

$

$

233
—
233

3,529
—
—
—
3,529

The fair value of the Company’s interest rate swaps was determined using cash flow analysis on the expected cash flow of 
the contract in combination with observable market-based inputs, including interest rate curves and implied volatilities. As part 
of this valuation, the Company considered the credit ratings of the counterparties to the interest rate swaps to determine if a 
credit risk adjustment was required. 

The fair value of the Company’s commodity swaps was determined using a cash flow analysis on the expected cash flow 
of the contract in combination with observable forward price inputs obtained from a third-party pricing source. As part of this 
valuation, the Company considered the credit ratings of the counterparties to the commodity swaps to determine if a credit risk 
adjustment was required. 

The fair value of the Company’s make-whole provisions were determined by comparing them against the rates of similar 

debt instruments under similar terms without a make-whole provision obtained from various highly rated third-party pricing 
sources.

The fair value of the Company’s contingent consideration liabilities were determined by evaluating the acquired asset’s 
future financial forecasts and evaluating which, if any, of the cumulative revenue targets, financial metrics and/or milestones 
are likely to be met.   The Company has classified contingent consideration related to certain acquisitions within Level 3 of the 
fair value hierarchy because the fair value is derived using significant unobservable inputs, which include discount rates and 
probability-weighted cash flows. The Company determined the fair value of its contingent consideration obligations based on a 
probability-weighted income approach derived from financial performance estimates and probability assessments of the 
attainment of certain targets. The Company establishes discount rates to be utilized in its valuation models based on the cost to 
borrow that would be required by a market participant for similar instruments. In determining the probability of attaining 
certain technical, financial and operation targets, the Company utilizes data regarding similar milestone events from our own 
experience, while considering the inherent difficulties and uncertainties in developing a product. On a quarterly basis, the 
Company reassesses the probability factors associated with the financial, operational and technical targets for its contingent 
consideration obligations. Significant judgment is employed in determining the appropriateness of these assumptions as of the 
acquisition date and for each subsequent period.

        The key assumptions as of December 31, 2018, related to the contingent consideration from the acquisition of certain 
assets of Chelsea Group Limited, used in the model include a discount rate of 18% for purposes of discounting the low and 
base case scenarios associated with achievement of the financial based earn-out. The probabilities assigned to these scenarios 
were 50% for both the low and base case scenarios. An increase or decrease in the probability of achievement of any scenario 
could result in a significant increase or decrease to the estimated fair value of the contingent consideration liability.

        The key assumptions as of December 31, 2018, related to the contingent consideration from the acquisition of certain 
lease options, used in the model include a discount rate of 18% for purposes of discounting the low, base and high case 
scenarios 

94AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

associated with achievement of the financial based earn-out. The probabilities assigned to these scenarios were 20% for the low 
case, 75% for the base case and 5% for the high case. An increase or decrease in the probability of achievement of any scenario 
could result in a significant increase or decrease to the estimated fair value of the contingent consideration liability. 

The following table sets forth a summary of changes in fair value of contingent liabilities classified as Level 3 for the year 

ended December 31, 2018:

Contingent consideration liabilities balance at the beginning of year. $
     Contingent consideration issued in connection with acquisitions .
     Loss on change in fair value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contingent consideration liabilities balance at the end of year. . . . . . $

—

918

44

962

Year Ended

December 31, 2018

The fair value of financial instruments is determined by reference to observable market data and other valuation 

techniques, as appropriate. The only category of financial instruments where the difference between fair value and recorded 
book value is notable is long-term debt. At December 31, 2018 and 2017, the fair value of the Company’s long-term debt was 
estimated using discounted cash flows analysis, based on the Company’s current incremental borrowing rates for similar types 
of borrowing arrangements which are considered to be level two inputs. There have been no transfers in or out of level two or 
three for the years ended December 31, 2018 and 2017. Based on the analysis performed, the fair value and the carrying value 
of the Company’s long-term debt, excluding capital leases, are as follows:

As of December 31, 2018

As of December 31, 2017

Fair Value

Carrying Value

Fair Value

Carrying Value

Long-term debt value (Level 2) . . . . . . . . . . . . . . . . . . . . $

211,823

$

212,687

$

160,108

$

160,598

The Company is also required periodically to measure certain other assets at fair value on a nonrecurring basis, including 

long-lived assets, goodwill and other intangible assets. The Company determined the fair value used in its annual goodwill 
impairment analysis with its own discounted cash flow analysis. The Company has determined the inputs used in such analysis 
as Level 3 inputs. There were no assets recorded at fair value on a non-recurring basis at December 31, 2018 or 2017.

18. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

At December 31, 2018 and 2017, the following table presents information about the fair value amounts of the Company’s

derivative instruments: 

Derivatives as of December 31,

2018

2017

Balance Sheet
Location

Fair Value

Balance Sheet
Location

Fair Value

Derivatives Designated as Hedging Instruments:

Interest rate swap contracts . . . . . . . . . . . . . . . . . . Other assets
Interest rate swap contracts . . . . . . . . . . . . . . . . . . Other liabilities

Derivatives Not Designated as Hedging Instruments:

Interest rate swap contracts . . . . . . . . . . . . . . . . . . Other assets
Commodity swap contracts . . . . . . . . . . . . . . . . . . Other assets
Commodity swap contracts . . . . . . . . . . . . . . . . . . Other liabilities
Interest make-whole provisions . . . . . . . . . . . . . . . Other liabilities

$
$

$
$
$
$

703 Other assets
3,187 Other liabilities

30 Other assets
33 Other assets
70 Other liabilities
1,808 Other liabilities

$
$

$
$
$
$

233
3,529

—
—
—
—

All but four of the Company’s freestanding derivatives were designated as hedging instruments as of December 31, 2018 

and all but one of the Company’s derivatives were designated as hedging instruments as of December 31, 2017. 

95AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

The following tables present information about the effects of the Company’s derivative instruments on the consolidated 

statements of income (loss) and consolidated statements of comprehensive income (loss):

Derivatives Designated as Hedging Instruments:

Interest rate swap contracts. . . . . . . . . . . . . . . Other expenses, net

$

(196) $

(271) $

(279)

Location of (Gain)
Loss Recognized in Net
Income

Amount of (Gain) Loss Recognized in Net Income for
the Year Ended December 31,

2018

2017

2016

Derivatives Not Designated as Hedging 
Instruments:

Interest rate swap contracts. . . . . . . . . . . . . . . Other expenses, net
Commodity swap contracts. . . . . . . . . . . . . . . Other expenses, net
Interest make-whole provisions . . . . . . . . . . . Other expenses, net

$
$
$

(308) $
$
36
$
337

— $
— $
— $

—
—
—

Year Ended

December 31, 2018

Derivatives Designated as Hedging Instruments:

     Accumulated loss in AOCI at the beginning of the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
            Cumulative impact from the adoption of ASU No. 2017-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
            Unrealized gain recognized in AOCI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
            Gain reclassified from AOCI to other expenses, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
     Accumulated loss in AOCI at the end of the period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

(1,745)
(486)
603
(196)
(1,824)

In March 2010, the Company entered into a fourteen-year interest rate swap contract under which the Company agreed to 

pay an amount equal to a specified fixed rate of interest times a notional amount, and to in turn receive an amount equal to a 
specified variable rate of interest times the same notional principal amount. The swap covered an initial notional amount of 
approximately $27,900 variable rate note at a fixed interest rate of 3.74% and expired in December 2024. This swap was 
designated as a hedge in March 2013. During the second quarter of 2014, this swap was de-designated and re-designated as a 
hedge as a result of a partial pay down of the associated hedged debt principal. As a result $566 was reclassified from 
accumulated other comprehensive loss and recorded as a reduction to other expenses, net in the Company’s consolidated 
statements of income (loss) during the second quarter of 2014. During the second quarter 2018, this swap was de-designated as 
a hedge as a result of the expected pay down of the associated hedged debt principal. As a result, $34 was reclassified from 
accumulated other comprehensive loss and recorded to other expenses, net in the Company’s consolidated statements of income 
(loss) during the second quarter 2018. In the third quarter of 2018, the expected pay down of the hedged debt principal occurred 
and the balance of the related hedge was written off. This resulted in a decrease of other liabilities of $252 in the Company’s 
consolidated balance sheets and a corresponding decrease in other expenses, net in the Company’s consolidated statements of 
income (loss).     

The followings tables present a listing of all the Company’s active derivative instruments as of December 31, 2018:

96AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

Active Interest Rate Swap

Effective Date

Expiration Date

October 2029

June 2033

11-Year, 5.77% Fixed . . . . . . . . . . . . October 2018
15-Year, 3.19% Fixed. . . . . . . . . . . . June 2018
3-Year, 2.46% Fixed. . . . . . . . . . . . . March 2018
10-Year, 4.74% Fixed. . . . . . . . . . . . June 2017
15-Year, 3.26% Fixed. . . . . . . . . . . . February 2023
7-Year, 2.19% Fixed. . . . . . . . . . . . . February 2016
8-Year, 3.70% Fixed. . . . . . . . . . . . . March 2020
8-Year, 3.70% Fixed. . . . . . . . . . . . . March 2020
8-Year, 1.71% Fixed. . . . . . . . . . . . . October 2012
8-Year, 1.71% Fixed. . . . . . . . . . . . . October 2012
15-Year, 5.30% Fixed. . . . . . . . . . . . February 2006
15.5-Year, 5.40% Fixed . . . . . . . . . . September 2008 March 2024

March 2020

March 2020

June 2028

June 2028

December 2020

December 2027

December 2038

February 2021

February 2023

Initial Notional 
Amount ($)

Status

$

9,200 Designated

10,000 Designated

17,100 Not Designated

14,100 Designated

14,084 Designated

20,746 Designated

14,643 Designated

10,734 Designated

9,665 Designated

7,085 Designated

3,256 Designated

13,081 Designated

Active Commodity Swap

Effective 
Date
1-Year, $2.84 MMBtu Fixed. . . . . . . May 2018
1-Year, $2.68 MMBtu Fixed. . . . . . . May 2019
1-Year, $2.70 MMBtu Fixed. . . . . . . May 2020

Expiration 
Date

April 2019

April 2020

April 2021

Initial 
Notional 
Amount 
(Volume)

Commodity 
Measurement Status

323,390 MMBtus

Not Designated

437,004 MMBtus

Not Designated

435,810 MMBtus

Not Designated

Other Derivatives

Classification

Effective Date

Expiration Date

Fair Value ($)

Interest make-whole provisions . . . . Liability

June/August
2018

December 2038

$

1,808

19. BUSINESS SEGMENT INFORMATION

The Company reports results under ASC 280, Segment Reporting. The Company’s reportable segments for the year ended 

December 31, 2018 are U.S. Regions, U.S. Federal, Canada and Non-Solar Distributed Generation (“DG”). The Company’s 
U.S. Regions, U.S. Federal and Canada segments offer energy efficiency products and services which include the design, 
engineering and installation of equipment and other measures to improve the efficiency and control the operation of a facility’s 
energy infrastructure, renewable energy solutions and services which include the construction of small-scale plants that the 
Company owns or develops for customers that produce electricity, gas, heat or cooling from renewable sources of energy and 
O&M services. The Company’s Non-solar DG segment sells electricity, processed renewable gas fuel, heat or cooling, 
produced from renewable sources of energy, other than solar, and generated by small-scale plants that the Company owns and 
O&M services for customer owned small-scale plants.  The Company’s U.S. Regions segment also, as of 2017, includes certain 
small-scale solar grid-tie plants developed for customers previously included in our Non-solar DG segment.  Previously 
reported amounts have been restated for comparative purposes.  The “All Other” category offers enterprise energy management 
services, consulting services and the sale of solar PV energy products and systems which we refer to as integrated-PV. These 
segments do not include results of other activities, such as corporate operating expenses not specifically allocated to the 
segments.  Certain reportable segments are an aggregation of operating segments. For the years ended December 31, 2018, 
2017 and 2016 unallocated corporate expenses were $30,415, $27,195 and $32,225, respectively. During the year ended 
December 31, 2016, the Company reserved for certain assets in its Canada segment totaling $1,934 due to collectability 
concerns as a result of its previously disclosed restructuring efforts. During the year ended December 31, 2016, the Company 
included in unallocated corporate activity $2,870 as a reserve for amounts payable from a customer who declared bankruptcy.

97AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

For the years ended December 31, 2018, 2017 and 2016 more than 77% of the Company’s revenues have been derived 
from federal, state, provincial or local government entities, including public housing authorities and public universities. The 
U.S. federal government, which is considered a single customer for reporting purposes, constituted 31.3%, 32.0% and 27.3% of 
the Company’s consolidated revenues for the years ended December 31, 2018, 2017 and 2016, respectively.  Revenues from the 
U.S. federal government are included in the Company’s U.S. Federal segment.

The reports of the Company’s chief operating decision maker do not include assets at the operating segment level.

An analysis of the Company’s business segment information and reconciliation to the consolidated financial statements is 

as follows:

U.S. Regions

U.S. Federal

Canada

Non-solar DG

All Other

Total
Consolidated

2018
Revenues . . . . . . . . . . . . . . . . . . . . . $
Interest income. . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . .
Depreciation and intangible asset
amortization . . . . . . . . . . . . . . . . . . .
Unallocated corporate activity . . . . .
Income before taxes, excluding
unallocated corporate activity . . . . .
2017
Revenues . . . . . . . . . . . . . . . . . . . . .
Interest income. . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . .
Depreciation and intangible asset
amortization . . . . . . . . . . . . . . . . . . .
Unallocated corporate activity . . . . .
Income (loss) before taxes,
excluding unallocated corporate
activity . . . . . . . . . . . . . . . . . . . . . . .
2016
Revenues . . . . . . . . . . . . . . . . . . . . .
Interest income. . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . .
Depreciation and intangible asset
amortization . . . . . . . . . . . . . . . . . . .
Unallocated corporate activity . . . . .
Income (loss) before taxes,
excluding unallocated corporate
activity . . . . . . . . . . . . . . . . . . . . . . .

334,344

$

246,309

$

38,982

$

82,655

$

84,848

$

787,138

9

6,188

5,578

—

126

1,045

2,772

—

—

1,917

1,155

—

147

6,172

18,101

—

20,543

36,332

(2,746)

13,412

—

22

1,542

—

5,264

282

15,344

29,148

(30,415)

72,805

290,196

229,146

2

2,672

2,974

—

44

1,056

2,623

—

43,803

1

1,927

1,178

—

79,220

83

3,389

15,259

—

74,787

717,152

—

38

1,881

—

130

9,082

23,915

(27,195)

13,865

29,261

1,751

8,115

2,920

55,912

276,766

178,005

1

1,055

1,901

—

11

942

2,588

—

50,448

—

1,737

1,090

—

74,395

38

3,319

14,557

—

71,613

651,227

—

23

2,628

—

50

7,076

22,764

(32,225)

19,802

22,246

(2,330)

9,301

(427)

48,592

Information as to the Company’s revenues by service and product lines is as follows:

2018

Year Ended December 31,
2017

2016

Revenues:

Project. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Energy Assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O&M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated-PV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

545,053

$

506,550

$

454,200

95,776

65,236

41,349

39,724

69,241

60,574

38,796

41,991

64,882

63,082

29,325

39,738

Total Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

787,138

$

717,152

$

651,227

98AMERESCO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)
(in thousands, except per share amounts)

20. QUARTERLY INFORMATION  (Unaudited)

The following tables set forth selected unaudited condensed consolidated statement of income (loss) data for each of the
most recent eight quarters ended December 31, 2018. Operating results for any quarter are not necessarily indicative of results 
for any future period.

Three Months Ended,

March 31

June 30

September 30

December 31

2018
Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Gross profit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Net income attributable to common shareholders . . . . . . . . . $

167,410
35,473
6,988

Net income per share attributable to common shareholders:

Basic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

0.15
0.15

Weighted average common shares outstanding:

Basic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45,373
45,994

$
$
$

$
$

196,982
42,776
8,702

0.19
0.19

45,470
46,406

2017
Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Gross profit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Net income (loss) attributable to common shareholders . . . . $
Net income (loss) per share attributable to common
shareholders:

134,610
25,924

$
$
(644) $

166,665
35,408
5,831

Basic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

(0.01) $
(0.01) $

0.13
0.13

Weighted average common shares outstanding:

Basic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

45,514
45,514

45,463
45,675

$
$
$

$
$

$
$
$

$
$

$
$
$

$
$

$
$
$

$
$

205,375
46,162
10,701

0.23
0.23

45,854
46,944

204,744
41,367
8,493

0.19
0.19

45,524
45,771

217,371
49,201
11,593

0.25
0.24

46,114
47,327

211,133
41,459
23,811

0.52
0.52

45,537
45,957

99REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of
Ameresco, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Ameresco, Inc. and Subsidiaries (the "Company") as of December 
31, 2018 and 2017 and the related consolidated statements of income (loss), comprehensive income (loss), changes in redeemable 
non-controlling interest and stockholders’ equity, and cash flows for each of the years in the three-year period ended December 
31, 2018, and the related notes (collectively referred to as the "financial statements"). We also have audited the Company's internal 
control  over  financial  reporting  as  of  December  31,  2018,  based  on  the  criteria  established  in  Internal  Control  -  Integrated 
Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013. 

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company 
as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period 
ended December 31, 2018 in conformity with accounting principles generally accepted in the United States of America. Also in 
our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 
31, 2018, based on the criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring 
Organizations of the Treadway Commission in 2013. 

Change in Accounting Principle 

As discussed in Note 3 to the financial statements, the Company has changed its method of accounting for revenue recognition 
in 2018 due to the adoption of Accounting Standards Update 2014-09, “Revenue from Contracts with Customers” as of January 
1, 2018.

Basis for Opinion

The Company's management is responsible for these financial statements, for maintaining effective internal control over financial 
reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying 
Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the 
Company's financial statements and an opinion on the Company's internal control over financial reporting based on our audits. 
We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") 
and  are  required  to  be  independent  with  respect  to  the  Company  in  accordance  with  the  U.S.  federal  securities  laws  and  the 
applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. 

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to 
error or fraud, and whether effective internal control over financial reporting was maintained in all material respects. 

Our audits of the financial statements included performing procedures to assess the risks of material misstatement of the financial 
statements,  whether  due  to  error  or  fraud,  and  performing  procedures  that  respond  to  those  risks.  Such  procedures  included 
examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included 
evaluating  the  accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as  evaluating  the  overall 
presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding 
of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design 
and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures 
as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Definition and Limitations of Internal Control Over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of 
financial  reporting  and  the  preparation  of  financial  statements  for  external  purposes  in  accordance  with  generally  accepted 
accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain 

100to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets 
of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable 
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that 
could have a material effect on the financial statements.

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because 
of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ RSM US LLP

We have served as the Company's auditor since 2010. 

Boston, Massachusetts 

March 8, 2019

101Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the 
effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, 
as of the end of the period covered by this annual report, or the evaluation date. Disclosure controls and procedures are 
designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the 
Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. 
Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only 
reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-
benefit relationship of possible controls and procedures. Our management, after evaluating the effectiveness of our disclosure 
controls and procedures as of the evaluation date, concluded that as of the evaluation date, our disclosure controls and 
procedures were effective at the reasonable assurance level.

Management’s Annual Report on Internal Control over Financial Reporting

Our management, with the participation of our principal executive officer and principal financial officer, is responsible for 
establishing and maintaining adequate internal control over our financial reporting as defined in Rules 13a-15(f) and 15d-15(f) 
under the Exchange Act as a process designed by, or under the supervision of, a company’s principal executive and principal 
financial officers and effected by our board of directors, management and other personnel to provide reasonable assurance 
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance 
with GAAP. Our internal control over financial reporting includes those policies and procedures that:

•

•

•

pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect our transactions and
dispositions of our assets;

provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements
in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with
authorizations of our management and directors; and

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition
of our assets that could have a material effect on our financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. 

Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. 

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2018. In 
making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway 
Commission (COSO) in Internal Control - Integrated Framework (2013).

Based on this assessment and those criteria, our management concluded that, as of December 31, 2018, our internal control 

over financial reporting was effective.

The effectiveness of our internal control over financial reporting as of December 31, 2018 has been audited by RSM US 

LLP, an independent registered public accounting firm, as stated in their report, which appears under Item 8.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting, other than those stated above, during our most 

recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over 
financial reporting.

Item 9B.  Other Information

None.

PART III

102Item 10.  Directors, Executive Officers and Corporate Governance

The information concerning our executive officers is set forth under the heading “Executive Officers” at the end of Item 1 

in Part I of this report.

We have adopted a written code of business conduct and ethics that applies to our directors, officers and employees, 

including our principal executive officer, principal financial officer, principal accounting officer or controller, and persons 
performing similar functions. A copy of the code of business conduct and ethics is posted on the Investor Relations section of 
our website, which is located at www.ameresco.com. In addition, we intend to post on our website all disclosures that are 
required by law or applicable NYSE listing standards concerning any amendments to, or waivers from, any provision of the 
code. We include our website address in this report only as an inactive textual reference and do not intend it to be an active link 
to our website. None of the material on our website is part of this Annual Report on Form 10-K.

The response to the remainder of this item is incorporated by reference from the discussion responsive thereto in the 
sections titled “Corporate Governance” and “Stock Ownership - Section 16(a) Beneficial Ownership Reporting Compliance” 
contained in the definitive proxy statement for our 2019 annual meeting of stockholders.

Item 11.  Executive Compensation

The response to this item is incorporated by reference from the discussion responsive thereto in the sections titled 

“Executive Compensation and Related Information” and “Corporate Governance” contained in the definitive proxy statement 
for our 2019 annual meeting of stockholders.

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Equity Compensation Plan Information

The following table provides information about the securities authorized for issuance under our equity compensation plans 

as of December 31, 2018:

Equity Compensation Plan Information

(a)

(b)

Number of securities to be
issued upon exercise of
outstanding options,
warrants and rights

Weighted-average
exercise price of
outstanding options,
warrants and rights

(c)
Number of securities
remaining available for
future issuance under
equity compensation plans
(excluding securities
reflected in column (a))

3,305,000

$

—
3,305,000

$

8.0501

—
8.0501

6,981,714

—
6,981,714

Plan category

Equity compensation plans approved by security 
holders(1)(2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equity compensation plans not approved by
security holders . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(1) Consists of our 2000 stock incentive plan and our 2010 stock incentive plan and our 2017 employee stock purchase

plan.

(2) Consists of 6,833,000 shares of our class A common stock remaining available for future issuance are under our 2010
stock incentive plan and 148,620 shares of our class A common stock remaining available for future issuance under
our 2017 employee stock purchase plan, including shares subject to purchase during the current purchase period. In
addition to being available for future issuance upon exercise of options that may be granted after December 31, 2018,
shares under our 2010 stock incentive plan may instead be issued in the form of stock appreciation rights, restricted
stock, restricted stock units and other stock-based awards.

The response to the remainder of this item is incorporated by reference from the discussion responsive thereto in the section 
titled “Stock Ownership” contained in the definitive proxy statement for our 2019 annual meeting of stockholders.

Item 13.  Certain Relationships and Related Transactions, and Director Independence

The response to this item is incorporated by reference from the discussion responsive thereto in the sections titled “Certain 

Relationships and Related Person Transactions” and “Corporate Governance” contained in the definitive proxy statement for 
our 2019 annual meeting of stockholders.

103Item 14.  Principal Accountant Fees and Services

The response to this item is incorporated by reference from the discussion responsive thereto in the section titled 

“Proposal 2 - Ratification of the Selection of our Independent Registered Public Accounting Firm” contained in the definitive 
proxy statement for our 2019 annual meeting of stockholders.

104Item 15.  Exhibits and Financial Statement Schedules

(a)(1) Consolidated Financial Statements.

PART IV

The following consolidated financial statements of Ameresco, Inc. are filed in Item 8 of this Annual Report on Form 10-K: 

Consolidated Balance Sheets as of December 31, 2018 and December 31, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Income (Loss) for the years ended December 31, 2018, December 31, 2017 and 
December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2018, December 31, 
2017 and December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Changes in Redeemable Non-Controlling Interest and Stockholders’ Equity for the 
years ended December 31, 2018, December 31, 2017 and December 31, 2016. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Cash Flows for the years ended December 31, 2018, December 31, 2017 and 
December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51

53

54

55

56

Notes to Consolidated Financial Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

58

Report of Independent Registered Public Accounting Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100

(2) Financial Statement Schedules.

Schedules are omitted because they are not applicable, or are not required, or because the information is included in the

consolidated financial statements and notes thereto.

(3) Exhibits.

The exhibits filed or furnished with this report or that are incorporated herein by reference are set forth in the Exhibit Index

immediately preceding such exhibits, which Exhibit Index is incorporated herein by reference.

105Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly 

caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. 

SIGNATURES 

Date:  March 8, 2019

AMERESCO, INC.

By:

/s/ George P. Sakellaris
George P. Sakellaris
President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual Report on Form 10-K has been signed 

below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Signature

/s/ George P. Sakellaris

George P. Sakellaris

/s/ Mark Chiplock

Mark Chiplock

/s/ David J. Anderson

David J. Anderson

/s/ David J. Corrsin

David J. Corrsin

/s/ Douglas I. Foy

Douglas I. Foy

/s/ Thomas S. Murley

Thomas S. Murley

/s/ Jennifer L. Miller

Jennifer L. Miller

/s/ Joseph W. Sutton

Joseph W. Sutton

/s/ Frank V. Wisneski

Frank V. Wisneski

Title

Chairman of the Board of Directors,
President and Chief Executive Officer
(Principal Executive Officer)

Vice President and Interim Chief Financial 
Officer
(Principal Financial and Accounting Officer)

Director

Director

Director

Director

Director

Director

Director

Date

March 8, 2019

March 8, 2019

March 8, 2019

March 8, 2019

March 8, 2019

March 8, 2019

March 8, 2019

March 8, 2019

March 8, 2019

106Exhibit Index 

Exhibit
Number

3.1

3.2

4.1

10.1.1

10.1.2

10.1.3

10.1.4

10.1.5

10.1.6

10.1.7

10.1.8

Description
Amended and Restated Certificate of Incorporation of Ameresco, Inc.  Filed as Exhibit 3.1 to our 
Current Report on Form 8-K dated July 27, 2010 and filed with the Commission on July 30, 2010 
(file no. 001-34811) and incorporated herein by reference.

Amended and Restated By-Laws of Ameresco, Inc. (as further amended May 22, 2014).  Filed as 
Exhibit 3.1 to our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2014 and 
filed with the Commission on July 31, 2014 (file no. 011-34811) and incorporated herein by 
reference. Filed as Exhibit 3.1 to our Registration Statement on Form S-1 (pre-effective 
amendment no. 4; reg. no. 333-165821) and incorporated herein by reference.

Specimen Certificate evidencing shares of Class A common stock.  Filed as Exhibit 4.1 to our 
Registration Statement on Form S-1 (pre-effective amendment no. 4; reg. no. 333-165821) and 
incorporated herein by reference.

Third Amended and Restated Credit and Security Agreement dated June 30, 2015 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 dated June 30, 2015 and filed with the Commission on July 2, 2015 (file no. 
001-34811) and incorporated herein by reference.

Amendment No. 1 to Third Amended and Restated Credit and Security Agreement dated April 22, 
2016 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 
Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2016 and filed with the 
Commission on August 9, 2016 (file no. 001-34811) and incorporated herein by reference.

Amendment No. 2 to Third Amended and Restated Credit and Security Agreement dated May 4, 
2016 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 10.2 to our 
Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2016 and filed with the 
Commission on August 9, 2016 (file no. 001-34811) and incorporated herein by reference.

Amendment No. 3 to Third Amended and Restated Credit and Security Agreement dated July 27, 
2016 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 
Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2016 and filed with the 
Commission on November 1, 2016 (file no. 001-34811) and incorporated herein by reference.

Amendment No. 4 to Third Amended and Restated Credit and Security Agreement dated 
November 17, 2016 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 dated November 17, 2016 and filed with the Commission 
on November 22, 2016 (file no. 001-34811) and incorporated herein by reference.

Amendment No. 5 to Third Amended and Restated Credit and Security Agreement dated March 2, 
2017 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 
Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2017 and filed with the 
Commission on May 2, 2017 (file no. 001-34811) and incorporated herein by reference.

Amendment No. 6 to Third Amended and Restated Credit and Security Agreement dated June 29, 
2017 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 dated June 29, 2017 and filed with the Commission on July 6, 2017 
(file no. 001-34811) and incorporated herein by reference.

Amendment No. 7 to Third Amended and Restated Credit and Security Agreement dated June 29, 
2018 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 10.2 to our 
Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2018 and filed with the 
Commission on August 8, 2018 (file no. 001-34811) and incorporated herein by reference.

107Exhibit
Number

10.1.9

10.2.1+

10.2.2+

10.2.3+

10.3.1+

10.3.2+

10.3.3+

10.4.1+

10.4.2+

10.5.1+

10.6.1+

10.7+

21.1*

23.1*

31.1*

31.2*

Description
Amendment No. 8 to Third Amended and Restated Credit and Security Agreement dated June 29, 
2018 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 
Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2018 and filed with the 
Commission on August 8, 2018 (file no. 001-34811) and incorporated herein by reference.
Ameresco, Inc. 2000 Stock Incentive Plan.  Filed as Exhibit 10.6 to our Registration Statement on 
Form S-1 (reg. no. 333-165821) and incorporated herein by reference.

Form of Incentive Stock Option Agreement granted under Ameresco, Inc. 2000 Stock Incentive 
Plan.  Filed as Exhibit 10.7 to our Registration Statement on Form S-1 (reg. no. 333-165821) and 
incorporated herein by reference.

Form of Non-Qualified Stock Option Agreement granted under Ameresco, Inc. 2000 Stock 
Incentive Plan.  Filed as Exhibit 10.8 to our Registration Statement on Form S-1 (reg. no. 
333-165821) and incorporated herein by reference.
Ameresco, Inc. 2010 Stock Incentive Plan.  Filed as Exhibit 10.10 to our Registration Statement
on Form S-1 (pre-effective amendment no. 4; reg. no. 333-165821) and incorporated herein by
reference.

Form of Incentive Stock Option Agreement granted under Ameresco, Inc. 2010 Stock Incentive 
Plan.  Filed as Exhibit 10.11 to our Registration Statement on Form S-1 (pre-effective amendment 
no. 4; reg. no. 333-165821) and incorporated herein by reference.

Form of Director Stock Option Agreement granted under Ameresco, Inc. 2010 Stock Incentive 
Plan.  Filed as Exhibit 10.12 to our Registration Statement on Form S-1 (pre-effective amendment 
no. 4; reg. no. 333-165821) and incorporated herein by reference.

Form of Indemnification Agreement entered into between Ameresco, Inc. and each non-employee 
director.  Filed as Exhibit 10.6.1 to our Annual Report on Form 10-K for the fiscal year ended 
December 31, 2010 and filed with the Commission on March 31, 2011 (file no. 001-34811) and 
incorporated herein by reference.
Form of Indemnification Agreement entered into between Ameresco, Inc. and each employee 
director.  Filed as Exhibit 10.6.2 to our Annual Report on Form 10-K for the fiscal year ended 
December 31, 2010 and filed with the Commission on March 31, 2011 (file no. 001-34811) and 
incorporated herein by reference.
Ameresco, Inc. 2017 Employee Stock Purchase Plan, as amended. Filed as Exhibit 10.1 to our 
Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2018 and filed with the 
Commission on August 8, 2018 (file no. 001-34811) and incorporated herein by reference.

Ameresco, Inc. Executive Management Team Additional Annual Incentive Performance Program. 
Filed as Exhibit 10.2 to our Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 
2017 and filed with the Commission on August 9, 2017 (file no. 001-34811) and incorporated 
herein by reference.

Agreement between the Ameresco, Inc. and John R. Granara, III, dated December 17, 2018. Filed 
as Exhibit 10.1 to our Current Report on Form 8-k dated December 18, 2018 and filed with the 
Commission on December 20, 2018 (file no. 001-34811) and incorporated herein by reference.
Subsidiaries of Ameresco, Inc.

Consent of RSM US LLP.

Principal Executive Officer Certification required by Rule 13a-14(a) or Rule 15d-14(a) of the 
Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act 
of 2002.

Principal Financial Officer Certification required by Rule 13a-14(a) or Rule 15d-14(a) of the 
Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act 
of 2002.

108Exhibit
Number

32.1**

101

Description

Certifications pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the 
Sarbanes-Oxley Act of 2002.

The following consolidated financial statements from Ameresco, Inc.’s Annual Report on Form
10-K for the year ended December 31, 2018, formatted in XBRL (Extensible Business Reporting
Language): (i) Consolidated Balance Sheets (ii) Consolidated Statements of Income (Loss), (iii)
Consolidated Statements of Comprehensive Income (Loss), (iv) Consolidated Statement of
Changes in Redeemable Non-Controlling Interests and Stockholders’ Equity, (v) Consolidated
Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements.

*

Filed herewith.

**  Furnished herewith.

+

Identifies a management contract or compensatory plan or arrangement in which an executive officer or director
of Ameresco participates.

++  Confidential treatment requested as to certain portions, which portions have been omitted and filed separately with 

the Securities and Exchange Commission.

109DIRECTORS

EXECUTIVE OFFICERS

George P. Sakellaris
Chairman, President and Chief Executive Officer, Ameresco

George P. Sakellaris
Chairman, President and Chief Executive Officer

David J. Anderson
Executive Vice President, Ameresco

David J. Anderson
Executive Vice President

David J. Corrsin
Executive Vice President, General Counsel and Secretary, Ameresco

Michael T. Bakas
Executive Vice President, Distributed Energy Systems

Douglas I. Foy
President, Serrafix Corporation

Nicole A. Bulgarino
Executive Vice President and General Manager, Federal Solutions

Jennifer L. Miller
Chief Business Sustainability Officer, Sappi North America

Mark A. Chiplock
Vice President and Interim Chief Financial Officer

Thomas S. Murley
Principal, Two Lights Energy Advisors LLC

David J. Corrsin
Executive Vice President, General Counsel and Secretary

Joseph W. Sutton
Chief Executive Officer, Sutton Ventures Group

Joseph P. DeManche
Executive Vice President, Engineering and Operations

Frank V. Wisneski
Partner (Retired), Wellington Management Company

Louis P. Maltezos
Executive Vice President

CORPORATE HEADQUARTERS

SHAREHOLDER INFORMATION

Ameresco Inc.
111 Speen Street
Suite 410
Framingham, MA 01701
508.661.2200
ameresco.com

STOCK LISTING

Our common stock is traded on the New York Stock 
Exchange under the symbol AMRC. 

Transfer Agent
American Stock Transfer and Trust
New York, NY

Copies of all SEC filings, including our 10-K, are available 
on our website under the Investor Relations section.

GENERAL INFORMATION

Ameresco Inc.
866.AMERESCO
info@ameresco.com