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      <liveTestFlag>LIVE</liveTestFlag>



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    <issuerInfo>
      <issuerCik>0001561894</issuerCik>
      <issuerName>Hannon Armstrong Sustainable Infrastructure Capital, Inc.</issuerName>
      <secFileNumber>001-35877</secFileNumber>
      <issuerAddress>
        <com:street1>ONE PARK PLACE, SUITE 200</com:street1>
        <com:city>ANNAPOLIS</com:city>
        <com:stateOrCountry>MD</com:stateOrCountry>
        <com:zipCode>21401</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>(410) 571-9860</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>McMahon Daniel K.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Former Officer</relationshipToIssuer>
      </relationshipsToIssuer>
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    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Wells Fargo Clearing Services </name>
        <address>
          <com:street1>1 N. Jefferson Ave</com:street1>
          <com:city>St. Louis</com:city>
          <com:stateOrCountry>MO</com:stateOrCountry>
          <com:zipCode>63103</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>10000</noOfUnitsSold>
      <aggregateMarketValue>319343.33</aggregateMarketValue>
      <noOfUnitsOutstanding>114033939</noOfUnitsOutstanding>
      <approxSaleDate>05/14/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
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      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/05/2020</acquiredDate>
      <natureOfAcquisitionTransaction>Grant</natureOfAcquisitionTransaction>
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      <isGiftTransaction>N</isGiftTransaction>
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      <paymentDate>03/05/2020</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
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    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/30/2024</noticeDate>
      <signature>Daniel K. McMahon</signature>
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144
0001645426
XXXXXXXX
LIVE
0001561894
Hannon Armstrong Sustainable Infrastructure Capital, Inc.
001-35877
ONE PARK PLACE, SUITE 200
ANNAPOLIS
MD
21401
(410) 571-9860
McMahon Daniel K.
Former Officer
Common
Wells Fargo Clearing Services
1 N. Jefferson Ave
St. Louis
MO
63103
10000
319343.33
114033939
05/14/2024
NYSE
Common
03/05/2020
Grant
Issuer
N
10000
03/05/2020
N/A
Y
05/30/2024
Daniel K. McMahon