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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

For the quarterly period ended September 30, 2015

OR

For the transition period from                      to                     

Commission file number 001-35877

HANNON ARMSTRONG SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.

(Exact name of registrant as specified in its charter)

(410) 571-9860

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

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 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  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock as of the latest practicable date: 38,269,566 shares of common stock, par value $0.01 per share, outstanding as of November 4, 2015 (which includes 1,297,584 shares of unvested restricted common stock).

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FORWARD-LOOKING STATEMENTS

We make forward-looking statements in this Quarterly Report on Form 10-Q (“Form 10-Q”) within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) that are subject to risks and uncertainties. For these statements, we claim the protections of the safe harbor for forward-looking statements contained in such Sections. These forward-looking statements include information about possible or assumed future results of our business, financial condition, liquidity, results of operations, plans and objectives. When we use the words “believe,” “expect,” “anticipate,” “estimate,” “plan,” “continue,” “intend,” “should,” “may” or similar expressions, we intend to identify forward-looking statements.

Forward-looking statements are subject to significant risks and uncertainties. Investors are cautioned against placing undue reliance on such statements. Actual results may differ materially from those set forth in the forward-looking statements. Factors that could cause actual results to differ materially from those described in the forward-looking statements are contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014 (our “2014 Form 10-K”) that was filed with the U.S. Securities and Exchange Commission (the “SEC”), and include risks discussed in the Management’s Discussion and Analysis of Financial Condition and Results of Operation of this Form 10-Q and in other periodic reports that we file with the SEC. Statements regarding the following subjects, among others, may be forward-looking:

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Forward-looking statements are based on beliefs, assumptions and expectations as of the date of this Form 10-Q. Any forward-looking statement speaks only as of the date on which it is made. New risks and uncertainties arise over time, and it is not possible for us to predict those events or how they may affect us. Except as required by law, we are not obligated to, and do not intend to, update or revise any forward-looking statements after the date of this Form 10-Q, whether as a result of new information, future events or otherwise.

The risks included here are not exhaustive. Other sections of this Form 10-Q or our 2014 Form 10-K may include additional factors that could adversely affect our business and financial performance. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all such risk factors, nor can it assess the impact of all such risk factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results.

The following discussion is a supplement to and should be read in conjunction with our 2014 Form 10-K.

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PART 1 FINANCIAL INFORMATION

Item 1. Financial Statements

HANNON ARMSTRONG SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

AS OF SEPTEMBER 30, 2015 and DECEMBER 31, 2014

(DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

(UNAUDITED)

See accompanying notes.

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HANNON ARMSTRONG SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

(UNAUDITED)

See accompanying notes.

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HANNON ARMSTRONG SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(DOLLARS IN THOUSANDS)

(UNAUDITED)

See accompanying notes.

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HANNON ARMSTRONG SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(DOLLARS IN THOUSANDS)

(UNAUDITED)

See accompanying notes.

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HANNON ARMSTRONG SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

September 30, 2015

Hannon Armstrong Sustainable Infrastructure Capital, Inc. (“the Company”) provides debt and equity to the energy efficiency and renewable energy markets. The Company and its subsidiaries are hereafter referred to as “we,” “us,” or “our.” We refer to the financings that we hold on our balance sheet as our “Portfolio.” Our Portfolio may include:

We finance our business through cash on hand, borrowings under our credit facility, and various asset-backed securitization transactions and equity issuances. We also generate fee income through asset-backed securitizations, by providing broker/dealer services and by servicing assets owned by third parties. Some of our subsidiaries are special purpose entities that are formed for specific operations associated with financing sustainable infrastructure receivables for specific long term contracts.

In April 2013, we completed our initial public offering (“IPO”). Concurrently with the IPO, we completed a series of transactions, which are referred to as the formation transactions that resulted in Hannon Armstrong Capital, LLC (the “Predecessor”), the entity that operated the historical business prior to the consummation of the IPO, becoming our subsidiary. Our common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “HASI.” See Note 11 for a summary of our public offerings of common stock.

We elected and qualified as a REIT for U.S. federal income tax purposes commencing with our taxable year ended December 31, 2013. We generally will not be subject to U.S. federal income taxes on our taxable income to the extent that we annually distribute all of our taxable income to stockholders and maintain our qualification as a REIT. We operate our business through, and serve as the sole general partner of, our operating partnership subsidiary, Hannon Armstrong Sustainable Infrastructure, L.P, (the “Operating Partnership”), which was formed to acquire and directly or indirectly own the Company’s assets. We also intend to operate our business in a manner that will continue to permit us to maintain our exception from registration as an investment company under the 1940 Act.

Real Estate Acquisitions

In May 2014, we entered into a Unit Purchase Agreement (the “Purchase Agreement”) to acquire all of the outstanding member interests in AWCC from Northwharf Nominees Limited, DBD AWCC LLC, NGP Energy Technology Partners II, L.P. and C.C. Hinckley Company, LLC in exchange for approximately $107 million (the “Purchase Price”), which we funded with our cash on hand and availability under our credit facilities.

Since the AWCC acquisition that was accounted for as a business combination, we have completed several smaller transactions that were also accounted for as business combinations for additional consideration of approximately $19 million, which we funded with our cash on hand and availability under our existing credit facilities.

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We incurred approximately $2.5 million of acquisition related costs in connection with these transactions, which we have previously expensed as acquisition costs in our 2014 consolidated statement of operations We recorded the acquired assets (including real estate related intangibles) at fair value. We did not assume any indebtedness in connection with these transactions. We used a qualified appraiser to assist us with the determination of the fair value estimates for the majority of these assets.

The purchase price allocation for these business combinations, which reflects our estimates of the fair value of the assets acquired, is as follows (dollars in millions, unaudited):

The unaudited pro forma summary below presents the consolidated results of operations, as if the acquisition was completed on January 1, 2013. The pro forma information is not necessarily indicative of what our actual results of operations would have been for the period, nor does it purport to represent our estimate of future results of operations.

Investments in Equity Method Affiliates

We have made several investments in wind projects through limited liability entities with an affiliate of JPMorgan Chase & Co (“JPMorgan”) and with Bluestem Creston Ridge, LLC (“Bluestem”) to purchase and hold minority interests in various wind projects operated by various wind energy companies. Through these arrangements, we indirectly own minority interests in five limited liability holding companies that own ten operating wind projects and one wind project that is under construction, which is expected to reach commercial operations in the fourth quarter of 2015. The following table sets forth certain information related to our equity method investments.

In June 2015, JPMorgan and one of the holding companies entered into an agreement regarding the treatment of certain tax matters that had the impact of reducing our expected future cash flows from that holding company. To offset this reduction in our future cash flows, in June 2015, JPMorgan paid us approximately $3 million, which effectively reduced our original investment from $144 million to $141 million in Strong Upwind Holdings I, LLC.

See Note 2 for our accounting treatment of these investments and Note 13 for the financial position and results of operations of the holding companies.

Basis of Presentation

The condensed consolidated financial statements reflect all normal and recurring adjustments that, in the opinion of management, are necessary for a fair presentation of the financial position, results of operations,

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comprehensive income and cash flows for the periods presented. The preparation of financial statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the reported amounts of revenues and expenses during the reporting period. The results of operations for the periods presented are not necessarily indicative of the results to be expected for the entire year. Certain information and footnote disclosures normally included in our annual consolidated financial statements have been condensed or omitted. Certain amounts in the prior year have been reclassified to conform to the current year presentation.

The condensed consolidated financial statements include the accounts of the Company and its controlled subsidiaries, including the Operating Partnership. All significant intercompany transactions and balances have been eliminated in consolidation.

Following the guidance for non-controlling interests in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 810, Consolidation, references in this report to our earnings per share and our net income and shareholders’ equity attributable to common shareholders do not include amounts attributable to non-controlling interests.

Financing Receivables

Financing receivables include financing energy efficiency and renewable energy project loans, receivables and direct financing leases.

Unless otherwise noted, we generally have the ability and intent to hold our financing receivables for the foreseeable future and thus they are classified as held for investment. Our ability and intent to hold certain financing receivables may change from time to time depending on a number of factors, including economic, liquidity and capital conditions. The carrying value of financing receivables held for investment represents the present value of the note, lease or other payments, net of any unearned fee income, which is recognized as income over the term of the note or lease using the effective interest method. Financing receivables that are held for investment are carried, unless deemed impaired, at cost, net of any unamortized acquisition premiums or discounts and include origination and acquisition costs, as applicable. Financing receivables that we intend to sell in the short-term are classified as held-for-sale and are carried at the lower of amortized cost or fair value on our balance sheet. The net purchases and proceeds from these sales of our held-for-sale financing receivables are recorded as an operating activity in our statement of cash flows based on our intent at the time of purchase. We may secure nonrecourse debt with the proceeds from our financing receivables.

We evaluate our financing receivables for potential delinquency or impairment on at least a quarterly basis and more frequently when economic or other conditions warrant such an evaluation. When a financing receivable becomes 90 days or more past due, and if we otherwise do not expect the debtor to be able to service all of its debt or other obligations, we will generally consider the financing receivable delinquent or impaired and place the financing receivable on non-accrual status and cease recognizing income from that financing receivable until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a financing receivable’s status significantly improves regarding the debtor’s ability to service the debt or other obligations, we will remove it from non-accrual status.

A financing receivable is also considered impaired as of the date when, based on current information and events, it is determined that it is probable that we will be unable to collect all amounts due in accordance with the original contracted terms. Many of our financing receivables are secured by energy efficiency and renewable energy infrastructure projects. Accordingly, we regularly evaluate the extent and impact of any credit deterioration associated with the performance and value of the underlying project, as well as the financial and operating capability of the borrower, its sponsors or the obligor as well as any guarantors. We consider a number of qualitative and quantitative factors in our assessment, including, as appropriate, a project’s operating results, loan-to-value ratios and any cash reserves, the ability of expected cash from operations to cover the cash flow requirements currently and into the future, key terms of the transaction, the ability of the borrower to refinance the transaction, other credit support from the sponsor or guarantor and the project’s collateral value. In addition, we consider the overall economic environment, the sustainable infrastructure sector, the effect of local, industry, and broader economic factors, the impact of any variation in weather and the historical and anticipated trends in interest rates, defaults and loss severities for similar transactions.

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If a financing receivable is considered to be impaired, we record an allowance to reduce the carrying value of the financing receivable to the present value of expected future cash flows discounted at the financing receivable’s contractual effective rate or the amount realizable from other contractual terms such as the currently estimated fair market value of the collateral less estimated selling costs, if repayment is expected solely from the collateral. We charge off financing receivables against the allowance when we determine the unpaid principal balance is uncollectible, net of recovered amounts.

Investments

Investments include debt securities that meet the criteria of ASC 320, Investments—Debt and Equity Securities. As a result of the sale of certain debt securities previously designated as held-to-maturity in 2014, we have designated our debt securities as available-for-sale and will carry these securities at fair value on our balance sheet from that date. Unrealized gains and losses, to the extent not considered other than temporary impairment (“OTTI”), on available-for-sale debt securities are recorded as a component of accumulated other comprehensive income (“OCI”) in equity on our balance sheet.

We evaluate our investments for OTTI on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. Our OTTI assessment is a subjective process requiring the use of judgments and assumptions. Accordingly, we regularly evaluate the extent and impact of any credit deterioration associated with the financial and operating performance and value of the underlying project. We consider a number of qualitative and quantitative factors in our assessment. We first consider the current fair value of the security and the duration of any unrealized loss. Other factors considered include changes in the credit rating, performance of the underlying project, key terms of the transaction and support provided by the sponsor or guarantor.

To the extent that we have identified an OTTI for a security and intend to hold the investment to maturity and we do not expect that we will be required to sell the security prior to recovery of the amortized cost basis, we recognize only the credit component of OTTI in earnings. We determine the credit component using the difference between the securities’ amortized cost basis and the present value of its expected future cash flows, discounted using the effective interest method or its estimated collateral value. Any remaining unrealized loss due to factors other than credit, or the non-credit component, is recorded in accumulated OCI.

To the extent we hold investments with an OTTI and if we have made the decision to sell the security or it is more likely than not that we will be required to sell the security prior to recovery of its amortized cost basis, we recognize the entire portion of the impairment in earnings.

Premiums or discounts on investment securities are amortized or accreted into investment interest income using the effective interest method.

Real Estate

Real estate reflects land or other real estate held on our balance sheet. Real estate intangibles reflect the value of associated lease intangibles, net of any amortization. In accordance with ASC 805, Business Combinations, the fair value of the real estate acquired in a business combination with in-place leases is allocated to (i) the acquired tangible assets, consisting of land or other real property such as buildings, and (ii) the identified intangible assets and liabilities, consisting of the value of above-market and below-market leases and the value of other acquired intangible assets, based in each case on their fair values.

The fair value of the tangible assets of an acquired leased property is determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land, building and tenant improvements, if any, based on the determination of the fair values of these assets. The as-if-vacant fair value of a property is determined by management based on an appraisal of the property by a qualified appraiser.

In allocating the fair value of the identified intangible assets and liabilities of an acquired property, above-market and below-market in-place lease values are recorded as intangible assets based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases, and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining term of the lease, including renewal

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periods likely of being exercised by the lessee. The capitalized above-market lease values are amortized as a reduction of rental income and the capitalized below-market lease values are amortized as an increase to rental income. We also record, as appropriate, an intangible asset for in-place leases. The value of the leases in place at the time of the transaction is equal to the potential revenue (rent and expenses) lost if the leases were not in place (during downtime) and that would be incurred to obtain the lease. The amortization is calculated over the initial term unless management believes that it is likely that the tenant would exercise the renewal option, whereby we would amortize the value attributable to the renewal over the renewal period. If a lease were to be terminated, all unamortized amounts relating to that lease would be written off.

We record the purchases of real estate, other than in a business combination (i.e. real estate with no in-places leases), as asset acquisitions that are recorded at cost, including acquisition and closing costs.

Our real estate is generally leased to tenants on a net lease basis, whereby the tenant is responsible for all operating expenses relating to the property, generally including property taxes, insurance, maintenance, repairs and capital expenditures. Scheduled rental revenue typically varies during the lease term and thus rental income is recognized on a straight-line basis, unless there is considerable risk as to collectability, so as to produce a constant periodic rent over the term of the lease. Accrued rental income is the aggregate difference between the scheduled rents which vary during the lease term and the income recognized on a straight-line basis and is recorded in other assets. Rental expenses (if any) are charged to operations as incurred.

Securitization of Receivables

We have established various special purpose entities or securitization trusts for the purpose of securitizing certain financing receivables or other debt investments. We determined that the trusts used in securitizations are variable interest entities, as defined in ASC 810, Consolidation. We typically serve as primary or master servicer of these trusts; however, as the servicer, we do not have the power to make significant decisions impacting the performance of the trusts. Based on an analysis of the structure of the trusts, under U.S. GAAP, we have concluded that we are not the primary beneficiary of the trusts as we do not have power over the trusts’ significant activities. Therefore, we do not consolidate these trusts in our condensed consolidated financial statements.

We account for transfers of financing receivables to these securitization trusts as sales pursuant to ASC 860, Transfers and Servicing, as the transferred receivables have been isolated from the transferor (i.e., put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership) and we have surrendered control over the transferred receivables. When we sell receivables in securitizations, we generally retain minor interests in the form of servicing rights and residual assets, which we refer to as securitization assets.

Gain or loss on the sale of receivables is calculated based on the excess of the proceeds received from the securitization (less any transaction costs) plus any retained interests obtained over the cost basis of the receivables sold. For retained interests, we generally estimate fair value based on the present value of future expected cash flows using our best estimates of the key assumptions of anticipated losses, prepayment rates, and current market discount rates commensurate with the risks involved.

We initially account for all separately recognized servicing assets and servicing liabilities at fair value and subsequently measure such servicing assets and liabilities using the amortization method. Servicing assets and liabilities are amortized in proportion to, and over the period of, estimated net servicing income with servicing income recognized as earned. We assess servicing assets for impairment at each reporting date. If the amortized cost of servicing assets is greater than the estimated fair value, we will recognize an impairment in net income.

Our other retained interest in securitized assets, the residual assets, are classified as available-for-sale securities and carried at fair value on the condensed consolidated balance sheets in Other Assets. We generally do not sell our residual assets. Our residual assets are evaluated for impairment in a similar manner as described under “Investments” above.

Interest income related to the residual assets is recognized using the effective interest rate method. If there is a change in expected cash flows related to the residual assets, we calculate a new yield based on the current amortized cost of the residual assets and the revised expected cash flows. This yield is used prospectively to recognize interest income.

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Modifications to Debt

We evaluate any modifications to our debt in accordance with the applicable guidance in ASC 470-50, Debt-Modifications and Extinguishments. If the debt instruments are substantially modified, the modification is accounted for in the same manner as a debt extinguishment (i.e., a major modification) and the fees paid are recognized as expense at the time of the modification. Otherwise, such fees are deferred and amortized as an adjustment of interest expense over the remaining term of the modified debt instrument using the interest method.

Cash and Cash Equivalents

Cash and cash equivalents include short-term government securities, certificates of deposit and money market funds, all of which had an original maturity of three months or less at the date of purchase. These securities are carried at their purchase price, which approximates fair value.

Restricted Cash

Restricted cash includes cash and cash equivalents set aside with certain lenders primarily to support deferred funding and other obligations outstanding at the balance sheet dates.

Variable Interest Entities and Equity Method Investment in Affiliates

We account for our investment in entities that are considered voting or variable interest entities under ASC 810. We perform an ongoing assessment to determine the primary beneficiary of each entity as required by ASC 810. See Securitization of Receivables above.

Substantially all of the activities of the special purpose entities that are formed for the purpose of holding our financing receivables and investments on our balance sheet are closely associated with our activities. Based on our assessment, we determined that we have power over and receive the benefits of these special purpose entities; hence, we are the primary beneficiary and should consolidate these entities under the provisions of ASC 810.

As described in Note 1, we made equity investments in various wind projects. We share in the cash flows and tax attributes according to a negotiated schedule. Our ownership interests in the transactions are structured in a typical wind partnership flip structure where we, along with other large institutional investors, if any, receive a stated preferred return consisting of a priority distribution of the project cash flows along with tax attributes. Once this preferred return is achieved, the partnership “flips” and the wind energy company which operates the project, receives the majority of the cash flows through its interest in the holding company and we, along with the other institutional investors, will have an on-going residual interest.

The limited liability entities with JPMorgan (which own the interest in the holding companies that own the wind projects) are jointly controlled with each member owning 50% of the voting stock. Based on our assessment, we have determined that these entities are voting interest entities and we have the ability to exercise influence over their operating and financial policies and as such we therefore account for such investments using the equity method.

We own directly, or indirectly as partners with JPMorgan, interests in various limited liability holding companies that own wind projects. Each of the holding companies is partially owned and operated by a wind energy company. Based on our assessment, we have determined that each of the holding companies (including the recently acquired ownership interest in the Creston Ridge Management, LLC) is a variable interest entity and that we have the ability to exercise influence over operating and financial policies of the holding companies, but we are not the primary beneficiary as we do not have the power to direct the most important decisions related to the most significant activities of the investment. Thus we do not consolidate the limited liability entities or the holding companies, but account for them using the equity method of accounting as described below. Our maximum exposure to loss associated with these entities is limited to our investment.

Under the equity method of accounting, the carrying value of our equity method investments is determined based on amounts we invested, adjusted for the equity in earnings or losses of investee allocated based on the limited liability entity agreement, less distributions received. Because the limited liability entity and holding company

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agreements contain preferences with regard to cash flows from operations, capital events and liquidation, we reflect our share of profits and losses by determining the difference between our “claim on the investee’s book value” at the end and the beginning of the period. This claim is calculated as the amount we would receive (or be obligated to pay) if the investee were to liquidate all of its assets at recorded amounts determined in accordance with U.S. GAAP and distribute the resulting cash to creditors and investors in accordance with their respective priorities. This method is commonly referred to as the hypothetical liquidation at book value method or (“HLBV”). Intra-company gains and losses are eliminated for an amount equal to our interest and are reflected in the share in loss from equity method investment in affiliate in the consolidated statements of operations. Cash distributions received from our equity method investments are classified as operating cash flows to the extent of cumulative HLBV earnings. Any additional cash flows are deemed to be returns of the investment and are classified as investing cash flows.

We evaluate the realization of our investment accounted for using the equity method if circumstances indicate that our investment is OTTI. OTTI impairment occurs when the estimated fair value of an investment is below the carrying value and the difference is determined to not be recoverable. This evaluation requires significant judgment regarding, but not limited to, the severity and duration of the impairment; the ability and intent to hold the securities until recovery; financial condition, liquidity, and near-term prospects of the issuer; specific events; and other factors. Based on an evaluation of our equity method investments, we determined that no impairment had occurred during the three or nine months ended September 30, 2015.

Income Taxes

We elected and qualified to be taxed as a REIT for U.S. federal income tax purposes, commencing with our taxable year ended December 31, 2013. To qualify as a REIT, we must meet a number of organizational and operational requirements, including a requirement that we currently distribute at least 90% of our net taxable income, excluding capital gains, to our shareholders. We intend to continue to meet the requirements for qualification as a REIT. As a REIT, we are not subject to U.S. federal corporate income tax on that portion of net income that is currently distributed to our owners. However, our taxable REIT subsidiaries (“TRS”) will generally be subject to U.S. federal, state, and local income taxes as well as taxes of foreign jurisdictions, if any.

We account for income taxes of our TRS using the asset and liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to the differences between the consolidated financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities from a change in tax rates is recognized in earnings in the period when the new rate is enacted.

We apply accounting guidance with respect to how uncertain tax positions should be recognized, measured, presented, and disclosed in the financial statements. This guidance requires the accounting and disclosure of tax positions taken or expected to be taken in the course of preparing our tax returns to determine whether the tax positions are “more likely than not” to be sustained by the applicable tax authority. We are required to analyze all open tax years, as defined by the statute of limitations, for all major jurisdictions, which includes U.S. federal and certain states. We have no examinations in progress, none are expected at this time, and years 2012 through 2014 are open. As of September 30, 2015 and December 31, 2014, we had no uncertain tax positions. Our policy is to recognize interest expense and penalties related to income tax matters as a component of other expense. There were no accrued interest and penalties as of September 30, 2015 and December 31, 2014, and no interest and penalties were recognized during the three or nine months ended September 30, 2015 and 2014.

Equity-Based Compensation

At the time of completion of our IPO, we adopted our 2013 Equity Incentive Plan (the “2013 Plan”), which provides for grants of stock options, stock appreciation rights, restricted stock units, shares of restricted common stock, phantom shares, dividend equivalent rights, long-term incentive-plan units (“LTIP units”) and other restricted limited partnership units issued by our Operating Partnership and other equity-based awards. From time to time, we may award unvested restricted shares as compensation to members of our senior management team, our independent directors, employees, advisors, consultants and other personnel under our 2013 Plan.

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We record compensation expense for stock awards in accordance with ASC 718, Compensation—Stock Compensation. We record compensation expense for unvested shares that vest solely based on service conditions on a straight-line basis over the vesting period based upon the fair market value of the shares on the date of grant, adjusted for forfeitures. For awards where the vesting is contingent upon achievement of certain performance targets, compensation expense is recorded over the requisite service period (which includes the performance period) based on our estimate of the achievement of the various performance targets, adjusted for forfeitures. Our share price at the date of grant and actual performance results at the end of the performance period determine the fair value and the number of shares that will ultimately be awarded. The award earned is generally between 0% and 150% of the initial target, depending on the extent to which the performance target are met. If minimum performance targets are not attained, no awards will be made.

Earnings Per Share

We compute earnings per share of common stock in accordance with ASC 260, Earnings Per Share. Basic earnings per share is calculated by dividing net income attributable to controlling stockholders (after consideration of the earnings allocated to unvested shares of restricted common stock or restricted stock units) by the weighted-average number of shares of common stock outstanding during the period excluding the weighted average number of unvested shares of restricted common stock or restricted stock units (“participating securities” as defined in Note 12). Diluted earnings per share is calculated by dividing net income attributable to controlling stockholders by the weighted-average number of shares of common stock outstanding during the period plus other potentially dilutive securities. No adjustment is made for shares that are anti-dilutive during a period.

Segment Reporting

We provide and arrange debt and equity financing for sustainable infrastructure projects and report all of our activities as one business segment.

Recently Issued Accounting Pronouncements

Revenue from Contracts with Customers

In May 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. The FASB proposed delaying the effective date of the standard by one year and issued a proposal that is intended to clarify and simplify the guidance. The updated standard becomes effective for us on January 1, 2018 and we expect will be first presented in our March 31, 2018, Form 10-Q. We have not yet selected a transition method, and we are currently evaluating the effect that the updated standard will have on our consolidated financial statements and related disclosures.

Debt Issuance Costs

In April 2015, the FASB issued ASU No. 2015-03, Interest – Imputation of Interest, which simplifies the presentation of debt issuance costs. ASU 2015-03 requires debt issuance costs related to long-term debt to be presented in the balance sheet as a reduction to the carrying amount of the related debt liability, consistent with the presentation of discounts. ASU 2015-03 is effective for fiscal years beginning after December 15, 2015, and for interim periods within those fiscal years, and is eligible for early adoption. We do not have a material amount of unamortized debt issuance costs and thus we do not believe the adoption of the new standard will have a material impact on our consolidated financial statements and related disclosures.

Fair value is defined as the price that would be received for an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. The fair value accounting guidance provides a three-level hierarchy for classifying financial instruments. The levels of inputs used to determine the fair value of our financial assets and liabilities carried on the balance sheet at fair value and for those which only

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disclosure of fair value is required are characterized in accordance with the fair value hierarchy established by ASC 820, Fair Value Measurements. Where inputs for a financial asset or liability fall in more than one level in the fair value hierarchy, the financial asset or liability is classified in its entirety based on the lowest level input that is significant to the fair value measurement of that financial asset or liability. We use our judgment and consider factors specific to the financial assets and liabilities in determining the significance of an input to the fair value measurements. As of September 30, 2015 and December 31, 2014, only our residual assets (described in Note 5), financing receivables held-for-sale and investments available-for-sale, if any, were carried at fair value on the condensed consolidated balance sheets on a recurring basis. The three levels of the fair value hierarchy are described below:

Unless otherwise discussed below, fair value is measured using a discounted cash flow model, contractual terms and Level 3 unobservable inputs which consist of base interest rates and spreads over base rates which are based upon market observation and recent comparable transactions. An increase in these unobservable inputs would result in a lower fair value and a decline would result in a higher fair value. The financing receivables held for sale are carried at cost, which approximates fair value.

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Investments

During 2014 as part of our portfolio management process, we sold an investment designated as held-to-maturity. As a result, we have transferred all of our remaining investments in debt securities to investments available-for-sale at fair value. The following table reconciles the beginning and ending balances for our Level 3 investments that are carried at fair value following the transfer of our investments to available-for-sale:

For investments held at fair value, we used a range of interest rate spreads of 3% to 5% based upon comparable transactions.

Non-recurring Fair Value Measurements

Our financial statements may include non-recurring fair value measurements related to acquisitions, if any. Assets acquired in a business combination are recorded at their fair value. We use third party valuation firms to assist us with developing our estimates of fair value. These valuations are prepared using Level 3 inputs.

Concentration of Credit Risk

Financing receivables, investments and leases consist of primarily U.S. federal government-backed receivables, investment grade state and local government receivables and receivables from various sustainable infrastructure projects and do not, in our view, represent a significant concentration of credit risk. See Note 6 for an analysis by type of obligor. We had cash deposits that are subject to credit risk as shown below:

Non-Controlling Interest in Consolidated Entities

Units of limited partnership interests in the Operating Partnership (“OP units”) that are owned by limited partners other than the Company are included in non-controlling interest on our consolidated balance sheets. As of September 30, 2015, the following OP units were issued and outstanding:

The outstanding OP units held by outside limited partners are redeemable for cash, or at our option, for a like number of shares of our common stock. We exchanged 46,290 OP units held by our non-controlling interest holders for the same number of shares of our common stock during the nine months ended September 30, 2015. No OP units were exchanged for shares of common stock during the three months ended September 30, 2015. The non-controlling interest holders are generally allocated their pro rata share of income, other comprehensive income and equity transactions.

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The following summarizes certain transactions with our securitization trusts:

In connection with securitization transactions, we typically retain servicing responsibilities and residual assets. In certain instances, we receive annual servicing fees ranging from 0.05% to 0.20% of the outstanding balance. Included in other assets in our consolidated balance sheets are our servicing assets at amortized cost and our residual assets at fair value. Our residual assets are subordinate to investors’ interests, and their values are subject to credit, prepayment and interest rate risks on the transferred financial assets. The investors and the securitization trusts have no recourse to our other assets for failure of debtors to pay when due. In computing gains and losses on securitizations, we use the same 8% discount rate we use for the fair value calculation of residual assets, which is determined based on a review of comparable market transactions.

As of September 30, 2015 and December 31, 2014, our managed assets totaled $2.9 billion and $2.5 billion respectively, of which $1.8 billion and $1.7 billion were securitized assets held in unconsolidated securitization trusts. There were no securitization credit losses during the three and nine months ended September 30, 2015 or 2014, and no material securitization delinquencies as of September 30, 2015 and December 31, 2014. Based on the nature of the receivables and experience-to-date, we do not currently expect to incur any credit losses on the receivables sold.

As of September 30, 2015, our Portfolio included approximately $1.1 billion of financing receivables, investments, real estate and equity method investments on our balance sheet. The financing receivables and investments are typically collateralized by contractually committed debt obligations of government entities or private high credit quality obligors and are often supported by additional forms of credit enhancement, including security interests and supplier guaranties. The real estate is typically land and related lease intangibles for long-term leases to wind and solar projects with high credit quality obligors. The equity method investments represent our minority equity investments in wind projects.

The following is an analysis of our Portfolio by type of obligor and credit quality as of September 30, 2015, with 99% of the debt and real estate portion of our Portfolio rated investment grade as shown below:

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The components of financing receivables as of September 30, 2015 and December 31, 2014, were as follows:

In accordance with the terms of certain financing receivables purchase agreements, payments of the purchase price is scheduled to be made over time, generally within twelve months of entering into the transaction, and as a result, we have recorded deferred funding obligations of $78 million and $88 million as of September 30, 2015 and December 31, 2014, respectively. We had $3.0 million in restricted cash as of December 31, 2014 which was be used to pay these funding obligations. As of September 30, 2015, we did not have any cash restricted to pay deferred funding obligations.

The following table provides a summary of our anticipated maturity dates of our financing receivables and investments and the weighted average yield for each range of maturities as of September 30, 2015:

Our real estate is leased to renewable energy projects, typically under long-term triple net leases with expiration dates that range between the years 2033 and 2045 under the initial terms and 2047 and 2061 if all extensions are exercised. The components of our real estate portfolio as of September 30, 2015 and December 31, 2014, were as follows:

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There are conservation easement agreements covering two of our properties that limit the use of the property upon expiration of the respective leases. The real estate related intangible assets are amortized on a straight-line basis over the lease term. As of September 30, 2015, the future amortization expense of these intangible assets is as follows:

As of September 30, 2015, the future minimum rental income under our land lease agreements is as follows:

During the nine months ended September 30, 2015, we collected the outstanding net balance of $0.8 million, on our previously disclosed estimated recovery amount carried in commercial non-investment grade financing receivables as a final recovery from the EnergySource LLC (“EnergySource”) loan and therefore, we charged off the remaining loan balance of $1.2 million against the allowance of $1.2 million. There was no impact on the statement of operations for the charge off of this loan during the three and nine months ended September 30, 2015. Certain of our executive officers and directors own an indirect minority interest in EnergySource following the distribution of the Predecessor’s ownership interest prior to our IPO.

We had no other financing receivables, investments or leases on nonaccrual status as of September 30, 2015 or December 31, 2014. There was no provision for credit losses for the three and nine months ended September 30, 2015 or 2014. We did not have any loan modifications that qualify as trouble debt restructurings for the three months ended September 30, 2015 or 2014.

We have a senior secured revolving credit facility with total maximum advances of $1.5 billion following an amendment that was completed in July 2015. The terms of the credit facility are set forth in (i) the Loan Agreement (G&I), as amended (the “G&I Loan Agreement”) that provides for borrowings in the principal amount of $150 million to be used to leverage certain qualifying government and institutional financings entered into by us, with maximum total advances (without giving effect to prepayments or repayments) of $450 million and (ii) the Loan Agreement (PF), as amended (the “PF Loan Agreement”) that provides for borrowings in the principal amount of $350 million to be used to leverage certain qualifying project financings entered into by us, with maximum total advances (without giving effect to prepayments or repayments) of $1.05 billion. We repaid borrowings related to certain projects to enable the collateral to be used for our September 2015 asset-backed nonrecourse debt issuance, which reduced the available principal amount from $400 million to $350 million under the PF Loan Agreement. The G&I Loan Agreement and PF Loan Agreements together are referred to as the “Loan Agreements.”

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The scheduled termination date of each of the Loan Agreements is July 19, 2019. Loans under the G&I Loan Agreement bear interest at a rate equal to the London Interbank Offered Rate (“LIBOR”) plus 1.5% or, under certain circumstances, 1.5% plus the highest of (i) the Federal Funds Rate plus 0.5%, (ii) the rate of interest publicly announced by Bank of America from time to time as its “prime rate,” and (iii) LIBOR plus 1.0%. Loans under the PF Loan Agreement bear interest at a rate equal to LIBOR plus 2.5% or, under certain circumstances, 2.5% plus the highest of (i) the Federal Funds Rate plus 0.5%, (ii) the rate of interest publicly announced by Bank of America from time to time as its “prime rate,” and (iii) LIBOR plus 1.0%. Under the PF Loan Agreement, we also have the option to borrow at a fixed rate of interest until the expiration of the credit facility in July 2019. The fixed rate is determined by agreement with the Administrative Agent and is based on the prevailing US SWAP rate of an equivalent term to the average-life of the fixed rate portion of the borrowing plus an agreed upon margin. The loans are made through wholly-owned special purpose subsidiaries (the “Borrowers”) and we have guaranteed the obligations of the Borrowers under each of the Loan Agreements pursuant to (x) a Continuing Guaranty, dated July 19, 2013, and (y) a Limited Guaranty, dated July 19, 2013, both as amended and restated.

Any financing we propose to be included in the borrowing base as collateral under the Loan Agreements is subject to the approval of the administrative agent in its sole discretion and the payment of a placement fee. We may, with the consent of the administrative agent, borrow against new projects before such projects become Approved Financings (as defined in the PF Loan Agreement) but after they have been pledged as collateral. The amount eligible to be drawn under the Loan Agreements for purposes of financing such investments will be based on a discount to the value of each investment or an applicable valuation percentage. Under the G&I Loan Agreement, the applicable valuation percentage for non-delinquent investments is 85% in the case of a U.S. federal government obligor, 80% in the case of an institutional obligor or a state and local obligor, and with respect to other obligors or in certain circumstances, such other percentage as the administrative agent may prescribe. Under the PF Loan Agreement, the applicable valuation percentage is 67% or such other percentage as the administrative agent may prescribe. The sum of approved financings after taking into account the valuation percentages and any changes in the valuation of the financings in accordance with the Loan Agreements determines the borrowing capacity, subject to the overall facility limits described above.

The following table provides additional detail on our credit facility as of September 30, 2015 and December 31, 2014:

We incurred approximately $12 million of costs associated with the Loan Agreements that have been capitalized (included in other assets on the condensed consolidated balance sheets) and will be amortized on a straight-line basis over the term of the Loan Agreements. On each monthly payment date, the Borrowers shall also pay to the administrative agent, for the benefit of the lenders, certain availability fees for each Loan Agreement equal to 0.50%, divided by 360, multiplied by the excess of the available borrowing capacity under each Loan Agreement over the actual amount borrowed under such Loan Agreement.

Each Loan Agreement contains terms, conditions, covenants, and representations and warranties that are customary and typical for a transaction of this nature. The Loan Agreements contain various affirmative and negative covenants, and limitations on the incurrence of liens and indebtedness, investments, fundamental organizational changes, dispositions, changes in the nature of business, transactions with affiliates, use of proceeds and stock repurchases.

Each Loan Agreement also includes customary events of default, including the existence of a default in more than 50% of underlying financings. The occurrence of an event of default may result in termination of the Loan Agreements, acceleration of amounts due under both Loan Agreements, and accrual of default interest at a rate of LIBOR plus 2.50% in the case of the G&I Loan Agreement and at a rate of LIBOR plus 5.00% in the case of the PF Loan Agreement.

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We were in compliance with the required financial covenants described below at each quarterly reporting date that such covenants were applicable:

Asset-Backed Nonrecourse Debt

In September 2015, we closed a private placement securitization transaction, pursuant to which HASI SYB Trust 2015-1 (the “Issuer”) issued (i) $101 million in aggregate principal amount of 4.28% HASI SYB 2015-1A, Class A Bonds (the “Class A Bonds”) and (ii) $18 million in aggregate principal amount of 5.0% HASI SYB 2015-1B, Class B Bonds (the “Class B Bonds” and together with the Class A Bonds, the “Bonds”), both with an anticipated repayment date in October 2034. The Class A Bonds rank senior to the Class B Bonds in priority of payment. We retained the Class B Bonds.

The Bonds are payable from, and secured by, all assets of HASI SYB Trust 2015-1, which consist primarily of the membership interests in 22 special purpose subsidiaries owning a portfolio of real property arrangements relating to solar and wind projects. These membership interests were contributed and sold to the Issuer by one of our subsidiaries. We act as servicer for the bonds. We did not guarantee the bonds or the collectability of the cash flows of the contributed assets. We have guaranteed the performance of the representations and warranties and other obligations of certain of our subsidiaries under the transaction documents (other than the Issuer’s payment obligations in respect of the Bonds) and provided an indemnify against certain losses from “bad acts” of such subsidiaries including fraud, failure to disclose a material fact, theft, misappropriation, voluntary bankruptcy or unauthorized transfers, in each case up to an aggregate amount not to exceed the outstanding balance of the Bonds plus accrued and unpaid interest with respect to the Bonds (which limitation shall not apply to environmental claims that are covered by the indemnity).

We have outstanding the following nonrecourse asset-backed debt (dollars in millions):

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Outstanding amounts under the nonrecourse asset-backed debt agreement and the value of assets pledged as security for the loans are as follows (dollars in millions):

We have pledged the ownership interest in the relevant assets or the relevant assets themselves to bankruptcy remote entities as security for the nonrecourse debt. The assets and credit of these entities are not available to satisfy any of our other debts and obligations, except as set forth in the loan agreements. The debtors can only look to the cash flows of the pledged assets to satisfy the debt and we are not liable for nonpayment of such cash flows. The nonrecourse debt agreements contains terms, conditions, covenants, and representations and warranties that are customary and typical for a transaction of this nature, including limitations on the incurrence of liens and indebtedness, investments, fundamental organizational changes, dispositions, changes in the nature of business, transactions with affiliates, use of proceeds and stock repurchases. The agreements also include customary events of default, the occurrence of which may result in termination of the agreements, acceleration of amounts due, and accrual of default interest.

We incurred approximately $6 million of costs associated with our asset-backed nonrecourse debt that have been capitalized (included in other assets on the consolidated balance sheets) and are being amortized using the effective interest method over the respective term.

Other Nonrecourse Debt

We have other nonrecourse debt that was used to finance certain of our financing receivables for the term of the financing receivables. Amounts due under nonrecourse notes are secured by financing receivables with a carrying value of approximately $101 million and $108 million as of September 30, 2015 and December 31, 2014, respectively, and there is no recourse to our general assets. Debt service payment requirements, in a majority of cases, are equal to or less than the cash flows received from the underlying financing receivables.

Analyses of other nonrecourse debt by interest rate are as follows:

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The stated minimum maturities of nonrecourse debt as of September 30, 2015, were as follows:

Litigation

The nature of our operations exposes us to the risk of claims and litigation in the normal course of our business. Other than non-material litigation arising out of the ordinary course of business, we are not currently subject to any legal proceedings that are probable of having a material adverse effect on our financial position, results of operations or cash flows.

We recorded a tax expense of less than $0.1 million for both the three and nine months ended September 30, 2015, respectively, related to the activities of our TRS. We recorded an income tax expense of $0.6 million and an income tax benefit of $0.2 million for the three and nine months ended September 30, 2014, respectively. Our income tax expenses and benefits recorded were determined using a federal rate of 35% and a combined state rate, net of federal benefit, of 5%.

Dividends and Distributions

Our board of directors declared the following dividends in 2014 and 2015:

We completed the following public offerings of common stock:

Awards of Shares of Restricted Common Stock under our 2013 Plan

We recognize equity-based compensation expense as described in Note 2 and have issued both awards with service conditions and awards with both service and performance conditions. During the nine months ended

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September 30, 2015, our board of directors awarded employees and directors 196,517 shares of restricted common stock that vest in 2015 to 2019 and 390,131 shares of restricted common stock to certain employees that vest upon the achievement of certain performance targets. As of September 30, 2015, we have concluded that it is probable that the performance conditions will be met.

For the three and nine months ended September 30, 2015, we recorded $2.7 million and $7.7 million respectively, of equity-based compensation expense as compared to $1.7 million and $3.6 million, respectively, for the three and nine months ended September 30, 2014. The total unrecognized compensation expense related to awards of shares of restricted common stock was $11.8 million as of September 30, 2015, that is expected to be recognized over a weighted-average term of approximately two years. The calculation of the equity-based compensation expense assumes a forfeiture rate up to 5%.

A summary of the unvested shares of restricted common stock that have been issued is as follows:

Both the net income or loss attributable to the non-controlling OP units and the non-controlling limited partners’ outstanding OP units have been excluded from the net of income or loss and the diluted earnings per share calculation attributable to common stockholders.

Unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and are included in the computation of earnings per share pursuant to the two-class method. Any shares of common stock which, if included in the diluted earnings per share calculation, would have an anti-dilutive effect have been excluded from the diluted earnings per share calculation.

The computation of basic and diluted earnings per common share is as follows:

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Strong Upwind

As described in Notes 1 and 2, we have noncontrolling equity investments in entities that own minority interests in wind projects. We account for our investments using the equity method of accounting and have elected to recognize earnings from these investments one quarter in arrears to allow for the receipt of financial information. During the three and nine months ended September 30, 2015, we recognized a gain of $0.2 million and a loss of $0.2 million, respectively, from our equity method investments.

The following is a summary of the consolidated financial position and results of operations of the significant holding companies, accounted for using the equity method:

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

In this Form 10-Q, unless specifically stated otherwise or the context otherwise indicates, references to “we,” “our,” “us,” and “HASI” refer to Hannon Armstrong Sustainable Infrastructure Capital, Inc., a Maryland corporation, Hannon Armstrong Sustainable Infrastructure, L.P., and any of our other subsidiaries. Hannon Armstrong Sustainable Infrastructure, L.P. is a Delaware limited partnership of which we are the sole general partner and to which we refer in this Form 10-Q as our “Operating Partnership.”

Hannon Armstrong Capital, LLC, a Maryland limited liability company, the entity that operated our historical business prior to the consummation of our IPO and which we refer to as the “Predecessor,” became our subsidiary upon consummation of our IPO. The financial data for the Predecessor for such periods do not reflect the material changes to the business as a result of the capital raised in the IPO including the broadened types of projects undertaken, the enhanced financial structuring flexibility and the ability to retain a larger share of the economics from the origination activities. Accordingly, the financial data for the Predecessor is not necessarily indicative of our results of operations, cash flows or financial position following the completion of the IPO.

The following discussion is a supplement to and should be read in conjunction with the accompanying condensed consolidated financial statements and related notes and with our 2014 Form 10-K, that was filed with the SEC.

Our Business

We provide debt and equity financing to the energy efficiency and renewable energy markets. We focus on providing preferred or senior level capital to established sponsors and high credit quality obligors for assets that generate long-term, recurring and predictable cash flows.

Our management team has extensive industry knowledge and experience having completed its first renewable energy financing over 25 years ago and its first energy efficiency financing over 15 years ago. We have deep and long-standing relationships in the markets we target with leading energy service providers, manufacturers, project developers and owners. We originate many of our transactions through programmatic finance relationships with global energy service companies (“ESCOs”), such as Honeywell International, Ingersoll-Rand, Johnson Controls, Schneider Electric, Siemens and United Technologies. We also originate transactions with renewable energy manufacturers, developers and operators such as SunPower, a group of public companies who own and operate renewable energy projects, referred to as YieldCos and a number of U.S. utility companies. Additionally, we rely on relationships with a variety of key financial participants, including institutional investors, private equity funds, senior lenders, and investment and commercial banks, as well as leading intermediaries, to complement our origination and financing activities. We believe we are the leading provider of financing for energy efficiency projects for the U.S. federal government, the largest property owner and energy user in the United States.

We focus our investment activities primarily on:

We may also provide financing solutions for other projects, such as water or communications infrastructure, that improve water or energy efficiency, increase energy system resiliency, positively impact the environment or more efficiently use natural resources.

Our goal is to invest in assets that generate long-term, recurring and predictable cash flows or cost savings that will be more than adequate to deliver attractive risk-adjusted returns to our stockholders. The cash flows or cost savings are generally generated from proven technologies that minimize performance uncertainty, enabling us to

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more accurately predict project cash flow over the term of the financing or investment. We provide capital through debt financings and a variety of preferred and common equity structures with a preference for structures in which we hold a senior or preferred position in the capital structure.

In April 2013, we completed our IPO, raising net proceeds of approximately $160 million. We have raised approximately $310 million in net proceeds in follow on public offerings, including $99 million in a follow on public offering completed in October 2015. Our strategy in undertaking the public offerings was to expand our proven ability to serve our rapidly growing markets by increasing our capital resources, enhancing our financial structuring flexibility, expanding the types of projects and end-customers we pursue, and selectively retaining a larger portion of the economics in the assets in which we invest. Prior to our IPO, we had traditionally financed our business by accessing the securitization market, primarily utilizing our relationships with institutional investors such as insurance companies and commercial banks. By utilizing the net proceeds from our offerings and our financing strategies, we hold a significantly larger portion of the assets we originate on our balance sheet, using our own capital in conjunction with both securitizations and other borrowings. For further information on our public equity offerings, see Note 11 to our financial statements in Item 1 of this Form 10-Q.

As a result of this strategy, we have seen, and expect to see, in comparison to historical periods, a larger portion of our total revenue derived from net investment revenue and other recurring and predictable revenue sources. While our investment interest expense has increased and we expect it to continue to increase, our net investment revenue, which represents the margin, or the difference between investment revenue and investment interest expense, has increased and we expect it to continue to increase as a result of our debt to equity mix, growth in the overall amount of our investments and the returns we achieve on individual assets.

We completed approximately $595 million of transactions during the nine months ended September 30, 2015, compared to approximately $503 million in the same period in 2014. We completed approximately $140 million of transactions during the quarter ended September 30, 2015, approximately 51% of which were added to our balance sheet and 49% were securitized or syndicated. We refer to the transactions that we hold on our balance sheet as our “Portfolio.” Our Portfolio, as of September 30, 2015, was approximately $1.1 billion and included:

In our securitization transactions, we transfer the transactions we originate to securitization trusts or other bankruptcy remote special purpose funding vehicles including to the Hannon Armstrong Multi-Asset Infrastructure Trust, or Hannie Mae. Large institutional investors, primarily insurance companies and commercial banks, historically provided the financing needed for a project by purchasing the notes issued by the trust or vehicle. The securitization market for the assets we finance remained active throughout the financial crisis due to investor demand for high credit quality, long-term investments. We typically arranged such securitizations of loans or other assets prior to originating the transaction and thus have avoided exposure to credit spread and interest rate risks that are normally associated with traditional capital markets conduit transactions. Additionally, we have typically avoided funding risks for these loans or other assets given that our securitization partners contractually agree to fund such assets before the origination transaction is completed.

In most cases, the transfer of loans or other assets to non-consolidated securitization trusts qualify as sales for accounting purposes. In these transactions, we record income as a gain on sale of receivables and investments. We also typically manage and service these assets in exchange for fees and other payments, which we record as fee income on our statement of operations. We may periodically provide other services, including arranging financings that are held on the balance sheet of other investors and advising various companies with respect to structuring investments.

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We managed approximately $2.9 billion of assets, which consisted of our Portfolio less our financing receivables held-for-sale plus approximately $1.8 billion of assets held in non-consolidated securitization trusts. We refer to this $2.9 billion of assets collectively as our managed assets. For more information on the assets included in our Portfolio, see the “Our Portfolio” section of Financial Condition and Results of Operation discussed below.

We have a large and active pipeline of potential new opportunities that are in various stages of our underwriting process. We refer to potential opportunities as being part of our pipeline if we have determined that the project fits within our investment strategy and exhibits the appropriate risk/reward characteristics through an initial credit analysis, including a quantitative and qualitative assessment of the opportunity, as well as research on the market and sponsor. Our pipeline of transactions that could potentially close over the next year consists of opportunities in which we will be the lead originator, as well as projects in which we may participate with other institutional investors. As of September 30, 2015, our pipeline consisted of more than $2.5 billion in new debt and equity opportunities. There can, however, be no assurance that any or all of the transactions in our pipeline will be completed.

Factors Impacting our Operating Results

We expect that our results of operations will be affected by a number of factors and will primarily depend on the size of our Portfolio, including the mix of transactions which we hold in our Portfolio, the income we receive from securitizations, syndications and other services, our Portfolio’s credit risk profile, changes in market interest rates, commodity prices, U.S. federal, state and/or municipal governmental policies, general market conditions in local, regional and national economies and our ability to qualify as a REIT and maintain our exception from registration as an investment company under the 1940 Act.

We have elected to qualify, and operate our business so as to qualify, to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”) commencing with our taxable year ended December 31, 2013. We believe that we have been organized and operated, and we intend to continue to operate, in such a manner so as to qualify for taxation as a REIT under the Internal Revenue Code. Qualification and taxation as a REIT depends on our ability to satisfy, among other requirements, certain asset and income tests, some of which depend upon the classification of at least 75% of the “fair market value” of our assets as real estate assets under the Internal Revenue Code. In May 2014, the United States Department of the Treasury published proposed regulations which, if adopted in the form proposed, would revise the definition of “real property” for purposes of the REIT income and asset tests. The proposed regulations are not yet in effect, and, depending upon whether and in what form they are actually adopted and how if adopted they are interpreted, may affect the classification of certain of our assets under these tests, and thus could require us to alter our mix of assets, adjust our approach to qualifying as a REIT or adjust our business strategy. The proposed regulations are proposed to be effective for calendar quarters beginning after they are published in final form. The Treasury has not indicated whether or when the proposed regulations will be finalized.

In order for us to continue to qualify as a REIT under the Internal Revenue Code, shares of our stock must be owned by 100 or more persons during at least 335 days of a taxable year of 12 months. Also, not more than 50% of the value of the outstanding shares of our stock may be owned, directly or constructively, by five or fewer individuals (as defined in the Internal Revenue Code to include certain entities) during the last half of a taxable year. To assist us in preserving our REIT qualification, among other purposes, our charter generally prohibits any person from directly or indirectly owning more than 9.8% in value or in number of shares, whichever is more restrictive, of the aggregate outstanding shares of our capital stock, the outstanding shares of any class or series of our preferred stock or the outstanding shares of our common stock. Our board of directors has established an exception from these ownership limits in our charter which permits a certain institutional investor and its clients to collectively hold up to 15% of our common stock.

Critical Accounting Policies and Use of Estimates

Our financial statements are prepared in accordance with U.S. GAAP, which requires the use of estimates and assumptions that involve the exercise of judgment and use of assumptions as to future uncertainties. Understanding our accounting policies and the extent to which we use management judgment and estimates in applying these policies is integral to understanding our financial statements. We provide a summary of our significant accounting policies under Note 2 in our 2014 Form 10-K and under Note 2 in Item 1 of this Form 10-Q.

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We have identified the following accounting policies as critical because they require significant judgments and assumptions about highly complex and inherently uncertain matters and the use of reasonably different estimates and assumptions could have a material impact on our reported results of operations or financial condition. These critical accounting policies govern:

We evaluate our critical accounting estimates and judgments on an ongoing basis and update them, as necessary, based on changing conditions.

We provide additional information on our critical accounting policies and use of estimates under “MD&A—Critical Accounting Policies and Use of Estimates” in our 2014 Form 10-K.

Financial Condition and Results of Operation

Our Portfolio

As of September 30, 2015, our Portfolio was approximately $1.1 billion. Approximately 65% of our Portfolio consisted of fixed rate loans, financing receivables, direct financing leases or debt securities, approximately 6% consisted of floating rate debt, approximately 14% was real estate investments with long-term leases and approximately 15% represented minority ownership of wind projects in eleven wind projects. We own more than 14,000 acres of land that are under long-term lease agreements with over 25 solar projects, which we have recorded in our financial statements as real estate and real estate intangibles, and the rights to payments from land leases for a diversified portfolio of over 50 wind projects, which we have recorded in our financial statements as financing receivables.

Excluding our equity investments, approximately 39% of our Portfolio consisted of U.S. federal government or state or local government obligors, approximately 60% consisted of investment grade commercial obligations and 1% consisted of non-investment grade rated commercial obligations, in all cases rated either by an independent third party rating service or our internal credit rating system. Our Portfolio, as of September 30, 2015, consists of over 100 transactions of greater than $1 million with an average transaction size of approximately $11 million and a weighted average remaining life (excluding match-funded transactions) of approximately 13 years. For further information on our Portfolio, see Notes 1 and 6 to our financial statements in Item 1 of this Form 10-Q.

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Table of Contents

The table below provides details on the interest rate and maturity of our financing receivables and investments as of September 30, 2015:

The table below presents, for each major category of our Portfolio (excluding our equity method investment) and our interest-bearing liabilities, the average outstanding balances, investment income earned or interest expense incurred, and average yield or cost. Our net investment margin represents the difference between the yield on our portfolio (including our rental income) and the cost of our interest-bearing liabilities, including the impact of non-interest bearing funding, primarily equity. This analysis excludes the debt related to the equity investment in the wind projects because our earnings on the equity investment in the wind projects are not included in investment revenue.