Exhibit 99.1

        
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Ameresco Reports Second Quarter 2023 Financial Results

Record Total Project Backlog Increased 9% Sequentially, with $493M in New Awards
Added a Record 113 MWe of Energy Assets into Development
Significant Battery Energy Storage Project Wins and Asset Activity
EPA Action Supports Positive Multiyear RNG Revenue Outlook
Reaffirms 2023 Guidance

Second Quarter 2023 Financial Highlights:
Revenues of $327.1 million
Net income attributable to common shareholders of $6.4 million
GAAP EPS of $0.12
Non-GAAP EPS of $0.15
Adjusted EBITDA of $37.4 million

FRAMINGHAM, MA – July 31, 2023 – Ameresco, Inc. (NYSE:AMRC), a leading cleantech integrator specializing in energy efficiency and renewable energy, today announced financial results for the fiscal quarter ended June 30, 2023. The Company also furnished supplemental information in conjunction with this press release in a Current Report on Form 8-K. The supplemental information, which includes Non-GAAP financial measures, has been posted to the “Investors” section of the Company’s website at www.ameresco.com. Reconciliations of Non-GAAP measures to the appropriate GAAP measures are included herein.
CEO George Sakellaris commented, “We had another strong quarter. I’m particularly pleased that our positive momentum continued to build strong growth in project backlog and assets in development, supporting both our 2023 guidance and our longer-term financial targets. Total project backlog increased by 9% sequentially, driven by the addition of $493 million in new awards. Furthermore, we continue to see a considerable year-on-year increase in the dollar value of the projects we are bidding on and winning. We also increased our net assets in development by over 100 MW in the second quarter, the largest quarterly increase in our company’s history.

“Battery storage is seeing tremendous growth given the need for greater resiliency, increased grid complexities from the rapid growth of renewables, and the financial benefits of the Inflation Reduction Act (IRA). Ameresco has emerged as a leader in the implementation of battery systems given our deep knowledge of deployable technologies, engineering expertise and supplier relationships as demonstrated by our significant project and asset wins and installations




during the quarter. Another positive development during the quarter was the EPA’s ruling concerning the final Renewable Fuel Standard (RFS) biofuel targets for 2023 – 2025. The outcome provides long term support to the RNG industry and increases our long-term visibility into this important revenue stream.

“During the quarter we published our third annual ESG report entitled ‘Doing Well by Doing Good’. We are proud that our renewable energy assets and customer projects have delivered a cumulative carbon offset of over 95 million metric tons of carbon dioxide. Looking ahead, Ameresco has set a target of achieving net zero carbon emissions from internal operations for scope 1 and scope 2 emissions by 2040 and has pledged to establish emissions reduction targets through the Science Based Targets initiative by 2025. We were also recognized with the Environmental Initiatives Award by the SEAL Business Sustainability Awards for our floating solar plant at Fort Bragg, which is the largest such installation in the southeast.”

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

Total revenue of $327.1 million exceeded the company’s guidance for the quarter, with faster than-expected execution on several larger projects. Energy Asset revenue increased 16.5% driven by continued growth in operating assets. O&M revenue increased 9.3% reflecting continued growth in long-term contracts. Other revenue increased 3.5% primarily due to strength in the Company’s utility SaaS and consulting business. Gross margin expanded year-on-year while SG&A increased slightly during the quarter to support growth in proposal activity and the integration of Enerqos. Net income attributable to common shareholders and adjusted EBITDA were $6.4 million and $37.4 million, respectively.

(in millions)2Q 20232Q 2022
Revenue
Net Income (Loss) (1)
Adj. EBITDARevenue
Net Income (1)
Adj. EBITDA
Projects$228.9($0.1)$6.1$489.1$15.8$29.2
Energy Assets$50.0$5.1$27.3$42.9$12.9$24.7
O&M$23.0$0.9$2.1$21.1$2.4$4.0
Other$25.2$0.5$2.0$24.3$1.1$2.4
Total (2)
$327.1$6.4$37.4$577.4$32.2$60.3
(1) Net Income (Loss) represents net income (loss) attributable to common shareholders.
(2) Numbers in table may not sum due to rounding.





($ in millions)At June 30, 2023
Awarded Project Backlog (1)
$2,146
Contracted Project Backlog$1,090
Total Project Backlog$3,236
12-month Contracted Backlog (2)
$745
O&M Revenue Backlog$1,239
12-month O&M Backlog$84
Energy Asset Visibility (3)
$2,275
Operating Energy Assets426 MWe
Ameresco's Net Assets in Development (4)
545 MWe
(1) Customer contracts that have not been signed yet
(2) 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
(3) Estimated contracted revenue and incentives during PPA period plus estimated additional revenue from operating RNG assets over a 20-year period, assuming RINs at $1.50/gallon and brown gas at $3.50/MMBtu with $3.00/MMBtu for LCFS on certain projects
(4) Net MWe capacity includes only our share of any jointly owned assets

Project Highlights:

Reflecting the recent increase in battery storage activity, Ameresco announced that its joint venture with Atura Power was selected to build a 250 MW battery energy storage system, representing part of the largest BESS award in Canadian history. In addition to providing E&C services for the JV, Ameresco will also own 10.1% of the Asset or approximately 25 MW.
Ameresco announced another significant battery storage win with a four site 379 MW project with Middle River Power at its California gas power plants helping to shift midday renewable energy flows to peak evening hours. The work is expected to commence in summer 2023 and reach completion in Q3 of 2024.
Activity in the higher education market remained strong. Ameresco announced a comprehensive, multi-phase solar and energy efficiency project with St. John’s College Santa Fe campus. This project will also include a large PV installation, along with 20 EV charging stations.

Asset Highlights
In the Second Quarter of 2023:

Ameresco’s Assets in Development ended the quarter at 594 MWe. After subtracting Ameresco’s partners’ minority interests, Ameresco’s owned capacity of Assets in Development at quarter end was 545 MWe.
We increased our net assets in development by 113 MW in the second quarter, the largest quarterly increase in our company’s history.





Summary and Outlook

“The Ameresco team delivered strong results that provide confidence in our annual guidance and set the stage for continued growth for years to come. As customers begin to take advantage of the numerous benefits afforded by the IRA, Ameresco, with our deep technical and financial expertise, remains very well positioned to continue to capture additional market share. This momentum together with our rapidly growing Energy Asset business and international opportunities support our long term growth targets,” Mr. Sakellaris concluded.

Our 2023 guidance, included in the table below, anticipates adjusted EBITDA growth of 5% at the midpoint.


FY 2023 Guidance Ranges
Revenue$1.45 billion$1.55 billion
Gross Margin19.5%20.0%
Adjusted EBITDA$210 million$220 million
Interest Expense & Other$30 million$35 million
Effective Tax Rate10%5%
Non-GAAP EPS$1.80$1.90

The Company’s Adjusted EBITDA and Non-GAAP EPS guidance excludes the impact of redeemable non-controlling interest activity, one-time charges, asset impairment charges, changes in contingent consideration, restructuring activities, as well as any related tax impact.

We estimate third and fourth quarter revenue, adjusted EBITDA and Adjusted EPS to be in the range of:

Q3 2023 Guidance RangesQ4 2023 Guidance Ranges
Revenue$370 million$400 million$550 million$580 million
Adjusted EBITDA$50 million$55 million$90 million$100 million
Non-GAAP EPS$0.45$0.50$1.20$1.25

We expect to place between 80 and 100 MWe of energy assets in service in 2023 including two RNG plants. A third plant we originally anticipated to be placed in service in 2023 is expected to be at mechanical completion by the end of the year, and fully commissioned in Q1 2024. Several additional RNG assets are in the late stages of development and construction, and we continue to expect that 4 or 5 of these will come online during 2024.

Two of the three Southern California Edison projects are currently in commissioning and are expected to achieve substantial completion in Q3. The third project, which was significantly impacted by the heavy rainfall in California, is expected to reach substantial completion in Q4. Based on this timing, we have requested an extension to mid December 2023 to the maturity date of our Delayed Draw Term Loan A under our Sr. Credit Facility.





Conference Call/Webcast Information
The Company will host a conference call today at 4:30 p.m. ET to discuss second quarter 2023 financial results, business and financial outlook and other business highlights. Participants may access the earnings conference call by pre-registering here at least fifteen minutes in advance. A live, listen-only webcast of the conference call will also be available over the Internet. Individuals wishing to listen can access the call through the “Investors” section of the Company’s website at www.ameresco.com. If you are unable to listen to the live call, an archived webcast will be available on the Company’s website for one year.
Use of Non-GAAP Financial Measures
This press release and the accompanying tables include references to adjusted EBITDA, Non- GAAP EPS, Non-GAAP net income and adjusted cash from operations, which are Non-GAAP financial measures. For a description of these Non-GAAP financial measures, including the reasons management uses these measures, please see the section following the accompanying tables titled “Exhibit A: Non-GAAP Financial Measures”. For a reconciliation of these Non-GAAP financial measures to the most directly comparable financial measures prepared in accordance with GAAP, please see Non-GAAP Financial Measures and Non-GAAP Financial Guidance in the accompanying tables.

About Ameresco, Inc.
Founded in 2000, Ameresco, Inc. (NYSE:AMRC) is a leading cleantech integrator and renewable energy asset developer, owner and operator. Our comprehensive portfolio includes energy efficiency, infrastructure upgrades, asset sustainability and renewable energy solutions delivered to clients throughout North America and Europe. Ameresco’s sustainability services in support of clients’ pursuit of Net-Zero include upgrades to a facility’s energy infrastructure and the development, construction, and operation of distributed energy resources. 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 1,200 employees providing local expertise in the United States, Canada, and Europe. For more information, visit www.ameresco.com.

Contact:
Media Relations
Leila Dillon, 508.661.2264, news@ameresco.com
Investor Relations
Eric Prouty, AdvisIRy Partners, 212.750.5800,
eric.prouty@advisiry.com
Lynn Morgen, AdvisIRy Partners, 212.750.5800,
lynn.morgen@advisiry.com

Safe Harbor Statement
Any statements in this press release about future expectations, plans and prospects for Ameresco, Inc., including statements about market conditions, pipeline, visibility, and backlog, as well as estimated future revenues, net income, adjusted EBITDA, Non-GAAP EPS, gross margin, capital investments, other financial guidance and longer term outlook, statements about our agreement with SCE including the impact of any delays, the requested extension to the maturity date of our Delayed Draw Term Loan A and the impact of the IRA and macroeconomic




conditions on our business, longer term outlook, and other statements containing the words “projects,” “believes,” “anticipates,” “plans,” “expects,” “will” and similar expressions, constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those indicated by such forward looking statements as a result of various important factors, including the timing of, and ability to, enter into contracts for awarded projects on the terms proposed or at all; the timing of work we do on projects where we recognize revenue on a percentage of completion basis, including the ability to perform under signed contracts without delay and in accordance with their terms; demand for our energy efficiency and renewable energy solutions; our ability to complete and operate our projects on a profitable basis and as committed to our customers; our ability to arrange financing to fund our operations and projects and to comply with covenants in our existing debt agreements; changes in federal, state and local government policies and programs related to energy efficiency and renewable energy and the fiscal health of the government; the ability of customers to cancel or defer contracts included in our backlog; the output and performance of our energy plants and energy projects; the effects of our acquisitions and joint ventures; seasonality in construction and in demand for our products and services; a customer’s decision to delay our work on, or other risks involved with, a particular project; availability and cost of labor and equipment particularly given global supply chain challenges and global trade conflicts; our reliance on third parties for our construction and installation work; the addition of new customers or the loss of existing customers; the impact of macroeconomic challenges, weather related events and climate change on our business; global supply chain challenges, component shortages and inflationary pressures; market price of the Company's stock prevailing from time to time; the nature of other investment opportunities presented to the Company from time to time; the Company's cash flows from operations; cybersecurity incidents and breaches; regulatory and other risks inherent to constructing and operating energy assets; risks related to our international operation and international growth strategy; and other factors discussed in our most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q. The forward-looking statements included in this press release represent our views as of the date of this press release. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.




AMERESCO, INC.
CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands, except share amounts)
June 30,December 31,
 20232022
 (Unaudited)
ASSETS
Current assets:  
Cash and cash equivalents$48,999 $115,534 
Restricted cash39,137 20,782 
Accounts receivable, net123,361 174,009 
Accounts receivable retainage, net37,803 38,057 
Costs and estimated earnings in excess of billings575,113 576,363 
Inventory, net14,127 14,218 
Prepaid expenses and other current assets58,874 38,617 
Income tax receivable7,497 7,746 
Project development costs, net16,956 16,025 
Total current assets921,867 1,001,351 
Federal ESPC receivable499,250 509,507 
Property and equipment, net16,888 15,707 
Energy assets, net1,417,690 1,181,525 
Deferred income tax assets, net3,594 3,045 
Goodwill, net77,846 70,633 
Intangible assets, net8,142 4,693 
Operating lease assets38,833 38,224 
Restricted cash, non-current portion13,677 13,572 
Other assets43,223 38,564 
Total assets$3,041,010 $2,876,821 
LIABILITIES, REDEEMABLE NON-CONTROLLING INTERESTS AND STOCKHOLDERS' EQUITY
Current liabilities:  
Current portions of long-term debt and financing lease liabilities$332,999 $331,479 
Accounts payable290,284 349,126 
Accrued expenses and other current liabilities81,008 89,166 
Current portions of operating lease liabilities5,935 5,829 
Billings in excess of cost and estimated earnings40,459 34,796 
Income taxes payable1,564 1,672 
Total current liabilities752,249 812,068 
Long-term debt and financing lease liabilities, net of current portion, unamortized discount and debt issuance costs784,266 568,635 
Federal ESPC liabilities464,566 478,497 
Deferred income tax liabilities, net7,971 9,181 
Deferred grant income7,319 7,590 
Long-term operating lease liabilities, net of current portion32,487 31,703 
Other liabilities70,175 49,493 




June 30,December 31,
 20232022
Redeemable non-controlling interests, net$47,994 $46,623 
Stockholders' equity:  
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, no shares issued and outstanding at June 30, 2023 and December 31, 2022— — 
Class A common stock, $0.0001 par value, 500,000,000 shares authorized, 36,302,405 shares issued and 34,200,610 shares outstanding at June 30, 2023, 36,050,157 shares issued and 33,948,362 shares outstanding at December 31, 2022
Class B common stock, $0.0001 par value, 144,000,000 shares authorized, 18,000,000 shares issued and outstanding at June 30, 2023 and December 31, 2022
Additional paid-in capital317,228 306,314 
Retained earnings540,964 533,549 
Accumulated other comprehensive loss, net(2,884)(4,051)
Treasury stock, at cost, 2,101,795 shares at June 30, 2023 and December 31, 2022(11,788)(11,788)
Stockholders' equity before non-controlling interest843,525 824,029 
Non-controlling interests30,458 49,002 
Total stockholders’ equity873,983 873,031 
Total liabilities, redeemable non-controlling interests and stockholders' equity$3,041,010 $2,876,821 





AMERESCO, INC.
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
(In thousands, except per share amounts) (Unaudited)
 Three Months Ended June 30,Six Months Ended June 30,
 2023202220232022
Revenues$327,074 $577,397 $598,116 $1,051,399 
Cost of revenues268,425 496,094 489,519 901,718 
Gross profit58,649 81,303 108,597 149,681 
Earnings from unconsolidated entities380 352 830 989 
Selling, general and administrative expenses41,413 38,601 82,714 78,930 
Operating income17,616 43,054 26,713 71,740 
Other expenses, net9,198 5,249 17,241 12,330 
Income before income taxes8,418 37,805 9,472 59,410 
Income tax provision (benefit)4,932 (498)7,239 
Net income8,413 32,873 9,970 52,171 
Net income attributable to non-controlling interests and redeemable non-controlling interests(2,045)(657)(2,500)(2,571)
Net income attributable to common shareholders$6,368 $32,216 $7,470 $49,600 
Net income per share attributable to common shareholders:  
Basic$0.12 $0.62 $0.14 $0.96 
Diluted$0.12 $0.61 $0.14 $0.93 
Weighted average common shares outstanding: 
Basic52,127 51,818 52,045 51,781 
Diluted53,211 53,173 53,232 53,407 





AMERESCO, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (in thousands) (Unaudited)
 Six Months Ended June 30,
 20232022
Cash flows from operating activities:
Net income$9,970 $52,171 
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation of energy assets, net27,725 23,978 
Depreciation of property and equipment1,607 1,404 
Increase (decrease) in contingent consideration155 (320)
Accretion of ARO liabilities130 72 
Amortization of debt discount and debt issuance costs2,364 2,036 
Amortization of intangible assets991 1,020 
Provision for bad debts579 244 
Loss on write-off of long-lived assets18 — 
Earnings from unconsolidated entities(830)(989)
Net (gain) loss from derivatives(261)555 
Stock-based compensation expense7,999 7,206 
Deferred income taxes, net(3,177)3,606 
Unrealized foreign exchange loss38 467 
Changes in operating assets and liabilities:
Accounts receivable60,028 (44,334)
Accounts receivable retainage354 (458)
Federal ESPC receivable(88,072)(113,478)
Inventory, net91 (2,080)
Costs and estimated earnings in excess of billings15,664 (358,603)
Prepaid expenses and other current assets1,312 (1,629)
Project development costs(2,825)(1,332)
Other assets(1,867)(10,020)
Accounts payable, accrued expenses and other current liabilities(80,555)126,783 
Billings in excess of cost and estimated earnings13,462 4,073 
Other liabilities1,240 18 
Income taxes receivable, net11 1,767 
Cash flows from operating activities
(33,849)(307,843)
Cash flows from investing activities:
Purchases of property and equipment(2,662)(2,525)
Capital investment in energy assets(261,547)(124,924)
Capital investment in major maintenance of energy assets(5,810)(4,838)
Acquisitions, net of cash received(9,184)— 
Loans to joint venture investments(39)— 
Cash flows from investing activities
(279,242)(132,287)
Cash flows from financing activities:  
Payments of debt discount and debt issuance costs(5,074)(2,756)
Proceeds from exercises of options and ESPP3,110 2,814 
(Payments on) proceeds from senior secured revolving credit facility, net(80,000)120,000 
Proceeds from long-term debt financings343,923 307,911 
Proceeds from Federal ESPC projects76,699 121,731 
Net proceeds from energy asset receivable financing arrangements8,114 4,651 
Contributions from non-controlling interests499 12,919 
Distributions to non-controlling interest(20,521)— 
Distributions to redeemable non-controlling interests, net(338)(561)
Payments on long-term debt and financing leases(61,335)(101,035)
Cash flows from financing activities
265,077 465,674 
Effect of exchange rate changes on cash(61)(1,291)
Net (decrease) increase in cash, cash equivalents, and restricted cash(48,075)24,253 
Cash, cash equivalents, and restricted cash, beginning of period149,888 87,054 
Cash, cash equivalents, and restricted cash, end of period$101,813 $111,307 




Non-GAAP Financial Measures (Unaudited, in thousands)
Three Months Ended June 30, 2023
Adjusted EBITDA:ProjectsEnergy AssetsO&MOtherConsolidated
Net (loss) income attributable to common shareholders$(50)$5,055 $895 $468 $6,368 
Impact from redeemable non-controlling interests— 1,424 — — 1,424 
Plus (less): Income tax provision (benefit)(568)(227)492 308 
Plus: Other expenses, net2,596 6,275 96 231 9,198 
Plus: Depreciation and amortization1,106 14,126 308 496 16,036 
Plus: Stock-based compensation2,772 606 279 305 3,962 
Plus: Contingent consideration, restructuring and other charges214 15 152 385 
Adjusted EBITDA$6,070 $27,274 $2,074 $1,960 $37,378 
Adjusted EBITDA margin2.7 %54.5 %9.0 %7.8 %11.4 %
Three Months Ended June 30, 2022
Adjusted EBITDA:ProjectsEnergy AssetsO&MOtherConsolidated
Net income attributable to common shareholders$15,786 $12,886 $2,428 $1,116 $32,216 
Impact from redeemable non-controlling interests— 657 — — 657 
Plus (less): Income tax provision (benefit)5,680 (2,300)1,056 496 4,932 
Plus: Other expenses, net3,719 1,278 104 148 5,249 
Plus: Depreciation and amortization723 11,887 286 388 13,284 
Plus: Stock-based compensation3,110 273 134 158 3,675 
Plus: Restructuring and other changes143 — 26 72 241 
Adjusted EBITDA$29,161 $24,681 $4,034 $2,378 $60,254 
Adjusted EBITDA margin6.0 %57.5 %19.2 %9.8 %10.4 %




Six Months Ended June 30, 2023
Adjusted EBITDA:ProjectsEnergy AssetsO&MOtherConsolidated
Net income (loss) attributable to common shareholders$(1,351)$6,205 $1,427 $1,189 $7,470 
Impact from redeemable non-controlling interests— 1,456 — — 1,456 
Plus (less): Income tax provision (benefit)(1,452)(155)619 490 (498)
Plus: Other expenses, net5,085 11,181 332 643 17,241 
Plus: Depreciation and amortization1,767 27,247 612 697 30,323 
Plus: Stock-based compensation5,501 1,213 611 674 7,999 
Plus: Contingent consideration, restructuring and other charges551 35 11 159 756 
Adjusted EBITDA$10,101 $47,182 $3,612 $3,852 $64,747 
Adjusted EBITDA margin2.5 %52.0 %8.0 %7.7 %10.8 %
Six Months Ended June 30, 2022
Adjusted EBITDA:ProjectsEnergy AssetsO&MOtherConsolidated
Net income attributable to common shareholders$25,946 $16,756 $5,058 $1,840 $49,600 
Impact from redeemable non-controlling interests— 2,571 — — 2,571 
Plus (less): Income tax provision (benefit)8,979 (4,084)1,448 896 7,239 
Plus: Other expenses, net5,143 6,737 219 231 12,330 
Plus: Depreciation and amortization1,574 23,372 621 835 26,402 
Plus: Stock-based compensation6,044 559 286 317 7,206 
Plus: Restructuring and other charges(12)(26)12 58 32 
Adjusted EBITDA$47,674 $45,885 $7,644 $4,177 $105,380 
Adjusted EBITDA margin5.4 %56.4 %18.5 %9.0 %10.0 %
Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
Non-GAAP net income and EPS:
Net income attributable to common shareholders$6,368 $32,216 $7,470 $49,600 
Adjustment for accretion of tax equity financing fees(28)(27)(55)(54)
Impact from redeemable non-controlling interests 1,424 657 1,456 2,571 
Plus: Contingent consideration, restructuring and other charges385 241 756 32 
(Less) Plus: Income tax effect of Non-GAAP adjustments(100)(63)(196)(9)
Non-GAAP net income8,049 33,024 9,431 52,140 
Diluted net income per common share$0.12 $0.61 $0.14 $0.93 
Effect of adjustments to net income0.03 0.01 0.04 0.05 
Non-GAAP EPS$0.15 $0.62 $0.18 $0.98 
Adjusted cash from operations:
Cash flows from operating activities$(92,621)$(31,721)$(33,849)$(307,843)
Plus: proceeds from Federal ESPC projects34,390 56,943 76,699 121,731 
Adjusted cash from operations$(58,231)$25,222 $42,850 $(186,112)





Other Financial Measures (Unaudited, in thousands)
Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
New contracts and awards:
New contracts$311,280 $148,600 $458,240 $375,300 
New awards (1)
$493,055 $223,100 $965,155 $661,100 
(1) Represents estimated future revenues from projects that have been awarded, though the contracts have not yet been signed

Non-GAAP Financial Guidance
Adjusted earnings before interest, taxes, depreciation and amortization (adjusted EBITDA):
Year Ended December 31, 2023
LowHigh
Operating income (1)
$132 million $140 million
Depreciation and amortization$63 million $65 million
Stock-based compensation$16 million $17 million
Non-controlling interest and other adjustments$(1) million $(2) million
Adjusted EBITDA$210 million $220 million

(1) Although net income is the most directly comparable GAAP measure, this table reconciles adjusted EBITDA to operating income because we are not able to calculate forward-looking net income without unreasonable efforts due to significant uncertainties with respect to the impact of accounting for our redeemable non-controlling interests and taxes.

Exhibit A: Non-GAAP Financial Measures
We use the Non-GAAP financial measures defined and discussed below to provide investors and others with useful supplemental information to our financial results prepared in accordance with GAAP. These Non-GAAP financial measures should not be considered as an alternative to any measure of financial performance calculated and presented in accordance with GAAP. For a reconciliation of these Non-GAAP measures to the most directly comparable financial measures prepared in accordance with GAAP, please see Non-GAAP Financial Measures and Non-GAAP Financial Guidance in the tables above.
We understand that, although measures similar to these Non-GAAP financial measures are frequently used by investors and securities analysts in their evaluation of companies, they have limitations as analytical tools, and investors should not consider them in isolation or as a substitute for the most directly comparable GAAP financial measures or an analysis of our results of operations as reported under GAAP. To properly and prudently evaluate our business, we encourage investors to review our GAAP financial statements included above, and not to rely on any single financial measure to evaluate our business.
Adjusted EBITDA and Adjusted EBITDA Margin
We define adjusted EBITDA as net income attributable to common shareholders, including impact from redeemable non-controlling interests, before income tax (benefit) provision, other expenses net, depreciation, amortization of intangible assets, accretion of asset retirement obligations, contingent consideration expense, stock-based compensation expense, energy asset impairment, restructuring and other charges, gain or loss on sale of equity investment, and




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

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

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

Adjusted Cash from Operations
We define adjusted cash from operations as cash flows from operating activities plus proceeds from Federal ESPC projects. Cash received in payment of Federal ESPC projects is treated as a financing cash flow under GAAP due to the unusual financing structure for these projects. These cash flows, however, correspond to the revenue generated by these projects. Thus, we believe that adjusting operating cash flow to include the cash generated by our Federal ESPC projects provides investors with a useful measure for evaluating the cash generating ability of our core operating business. Our management uses adjusted cash from operations as a measure of liquidity because it captures all sources of cash associated with our revenue generated by operations.