<ACCESSION-NUMBER>0001561894-18-000088 <TYPE>10-Q <PUBLIC-DOCUMENT-COUNT>86 <PERIOD>20180630 <FILING-DATE>20180803 <DATE-OF-FILING-DATE-CHANGE>20180803 <FILER> <COMPANY-DATA> <CONFORMED-NAME>Hannon Armstrong Sustainable Infrastructure Capital, Inc. <CIK>0001561894 <ASSIGNED-SIC>6798 <IRS-NUMBER>461347456 <STATE-OF-INCORPORATION>MD <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>10-Q <ACT>34 <FILE-NUMBER>001-35877 <FILM-NUMBER>18992030 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>1906 TOWNE CENTRE BLVD, SUITE 370 <CITY>ANNAPOLIS <STATE>MD <ZIP>21401 <PHONE>(410) 571-9860 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>1906 TOWNE CENTRE BLVD, SUITE 370 <CITY>ANNAPOLIS <STATE>MD <ZIP>21401 </MAIL-ADDRESS> </FILER>