X0306 4 2016-12-31 0 0001561894 Hannon Armstrong Sustainable Infrastructure Capital, Inc. HASI 0001574200 Eckel Jeffrey 1906 TOWNE CENTRE BLVD. SUITE 370 ANNAPOLIS MD 21401 1 1 0 0 President and CEO Common stock, par value $0.01 per share 2016-12-31 4 F 0 22031 19.04 D 1101287 D Common stock, par value $0.01 per share 15460 I By Jeffrey W. Eckel Revocable Trust Common stock, par value $0.01 per share 770 I By grandson Consists of shares of Common Stock withheld by the issuer, with approval of the issuer's Board of Directors, in order to satisfy the tax withholding obligation of the reporting person in connection with the vesting of 43,598 shares of Common Stock. Represents the opening price of the Common Stock on December 30, 2016. These shares are held by the Jeffrey W. Eckel Revocable Trust, of which Jeffrey W. Eckel is the sole trustee and beneficiary. The reporting person acts as custodian for his grandson under the Uniform Gifts to Minors Act. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. /s/ Jeffrey Eckel 2017-01-04