Hannon Armstrong Sustainable Infrastructure Capital, Inc. ("HASI," "we," "our," or the "Company") (NYSE: HASI), a leading investor in climate solutions, today announced that it is commencing a public offering of $300 million of shares of common stock. The Company expects to grant the underwriters a 30-day option to purchase up to $45 million of additional shares of common stock. The Company intends to utilize the net proceeds of this offering for general corporate purposes.

J.P. Morgan, BofA Securities, and Goldman Sachs & Co. LLC are acting as joint book-running managers for the offering.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission ("SEC") and has become effective. The offering will be made by means of a preliminary prospectus supplement and accompanying prospectus. A copy of the preliminary prospectus supplement and accompanying prospectus related to the offering can be obtained by contacting J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, by telephone at (866) 803-9204 or by email at prospectus-eq_fi@jpmchase.com, BofA Securities, NC1-022-02-25, 201 North Tryon Street, Charlotte, NC 28255-0001, Attn: Prospectus Department, Email: dg.prospectus_requests@bofa.com or Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, New York 10282, telephone: 1-866-471-2526, facsimile: 1-212-902-9316, or by emailing prospectus-ny@ny.email.gs.com.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any of the offered shares, nor shall there be any sale of such shares in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or other jurisdiction.

About HASI

HASI (NYSE: HASI) is a leading climate positive public company that actively partners with clients to deploy real assets that facilitate the energy transition. With more than $10 billion in managed assets, our vision is that every investment improves our climate future.

Forward-Looking Statements

Some of the information in this press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. When used in this press release, words such as "believe," "expect," "anticipate," "estimate," "plan," "continue," "intend," "should," "may," "target," or similar expressions, are intended to identify such forward-looking statements. Forward-looking statements are subject to significant risks and uncertainties. Investors are cautioned against placing undue reliance on such statements. Forward-looking statements are not predictions of future events. 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 include those discussed under the caption "Risk Factors" included in the Company's Annual Report on Form 10-K (as supplemented by our Form 10-K/A) for the Company's fiscal year ended December 31, 2022, which was filed with the SEC, as well as in other reports that the Company files with the SEC.

Forward-looking statements are based on beliefs, assumptions and expectations as of the date of this press release. The Company disclaims any obligation to publicly release the results of any revisions to these forward-looking statements reflecting new estimates, events or circumstances after the date of this press release.

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