WASHINGTON, DC 20549 FORM 10-Q ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 HA SUSTAINABLE INFRASTRUCTURE CAPITAL, INC.(Exact name of registrant as specified in its charter) 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 theSecurities 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 resultsof our business, financial condition, liquidity, results of operations, plans and objectives. When we use the words “believe,” “expect,” Forward-looking statements are subject to significant risks and uncertainties. Investors are cautioned against placing undue reliance onsuch statements. Actual results may differ materially from those set forth in the forward-looking statements. Accordingly, any such statementsare qualified in their entirety by reference to, and are accompanied by, important factors included in Part I, Item 1A. Risk Factors contained inour Annual Report on Form 10-K for the year ended December 31, 2025, as amended by Amendment No.1 to our Annual Report on Form 10- Any forward-looking statement speaks only as of the date on which such statement is made, and we undertake no obligation to updateany forward-looking statement to reflect events or circumstances, including, but not limited to, unanticipated events, after the date on whichsuch statement is made, unless otherwise required by law. New factors emerge from time to time and it is not possible for management to PART I. FINANCIAL INFORMATION HA SUSTAINABLE INFRASTRUCTURE CAPITAL, INC. (UNAUDITED)March 31, 2026 1.The Company HA Sustainable Infrastructure Capital, Inc. (the “Company”), actively partners with clients to deploy real assets that facilitate the energytransition. The Company and its subsidiaries are hereafter referred to as “we,” “us” or “our.” Our investments take various forms, including equity, joint ventures, land ownership, lending, and other financing transactions. We referto the income-producing assets that we hold on our balance sheet as our “Portfolio.” Our Portfolio includes equity investments in eitherpreferred or common structures in unconsolidated entities, receivables, and debt securities. We generate recurring income from net investment We finance our business through cash on hand, secured and unsecured debt, convertible securities, or equity issuances and may alsodecide to finance such transactions through the use of off-balance sheet securitization or syndication structures. Our common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “HASI.” We intend to continue to operate ourbusiness in a manner that will maintain our exemption from registration as an investment company under the Investment Company Act of1940, as amended (the “1940 Act”). We operate our business through, and along with two of our wholly owned subsidiaries, serve as thegeneral partners of, our operating partnership subsidiary, Hannon Armstrong Sustainable Infrastructure, L.P., (the “Operating Partnership”), 2.Summary of Significant Accounting Policies Basis of Presentation The preparation of financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”) requiresmanagement to make estimates and assumptions that affect the reported amounts of assets and liabilities and the reported amounts of revenuesand expenses during the reporting period. Actual results could differ from these estimates and such differences could be material. Thesefinancial statements have been prepared in accordance with the instructions to Form 10-Q and should be read in conjunction with theconsolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2025, asfiled with the SEC. In the opinion of management, all adjustments necessary to present fairly our financial position, results of operations and The consolidated financial statements include our accounts and controlled subsidiaries, including the Operating Partnership. All materialintercompany transactions and balances have been eliminated in consolidation. Following the guidance for non-controlling interests in Financial Accounting Standards Board Accounting Standards Codification(“ASC”) 810, Consolidation (“ASC 810”), references in this report to our earnings per share and our net income and stockholders’ equity Consolidation We account for our investments in entities that are considered voting interest entities or variable interest entities (“VIEs”) under ASC810 and assess on an ongoing basis whether we should