FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Herron J Brendan
   2. Issuer Name and Ticker or Trading Symbol
Hannon Armstrong Sustainable Infrastructure Capital, Inc. [HASI] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP
(Last)
(First)
(Middle)
1906 TOWNE CENTRE BLVD. SUITE 370		 3. Date of Earliest Transaction (Month/Day/Year)
04/01/2021
(Street)

ANNAPOLIS, MD 21401		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common stock, par value $0.01 per share               166,064 (1) D  
Common stock, par value $0.01 per share               7,500 (2) I By spouse
Common stock, par value $0.01 per share               2,640 (3) I By spouse as UTMA custodian for children

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
LTIP Units (4) (5) 04/01/2021   A   14,004     (4)(5)   (6) Common stock, par value $0.01 per share 14,004.00 $ 0 168,504 I By HASI Management HoldCo LLC (7)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Herron J Brendan
1906 TOWNE CENTRE BLVD. SUITE 370
ANNAPOLIS, MD 21401		       EVP  

Signatures

 /s/ J. Brendan Herron   04/05/2021
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Excludes 135,938 limited partnership units in Hannon Armstrong Sustainable Infrastructure, L.P., the issuer's operating partnership subsidiary, held by the reporting person, previously reported by the reporting person, which are redeemable for cash, or at the option of the issuer, for shares of Common Stock of the issuer on a one-for-one basis.
(2) These shares are held by the reporting person's spouse. The reporting person disclaims ownership other than to the extent of his pecuniary interest.
(3) These shares are held by the reporting person's spouse as custodian for the reporting person's three children under the Uniform Transfers to Minors Act. The reporting person disclaims beneficial ownership other than to the extent of his pecuniary interest.
(4) 168,504 units of limited partner interest ("OP Units") in Hannon Armstrong Sustainable Infrastructure, LP (the "Partnership") are issuable upon the vesting and conversion of 168,504 long-term incentive planunits ("LTIP Units") in the Partnership. The LTIP Units were granted to the Reporting Person under the Issuer's 2013 Equity Incentive Plan, as amended.
(5) Vested LTIP Units, after achieving parity with OP Units (as described in the Partnership's Amended and Restated Agreement of Limited Partnership (the "Partnership Agreement")), are eligible to be converted into OP Units on a one-for-one basis upon the satisfaction of conditions set forth in the Partnership Agreement. Upon conversion of LTIP Units into OP Units, the Reporting Person will have the right to cause the Partnership to redeem a portion of the Reporting Person's OP Units for cash in an amount equal to the market value (as defined in the Partnership Agreement) of an equivalent number of shares of common stock, par value $0.01 per share, of Hannon Armstrong Sustainable Infrastructure Capital, Inc. (the "Issuer"), or at the Issuer's option, shares of the Issuer's common stock on a one-for-one basis, subject to certain adjustments.
(6) N/A
(7) These LTIP Units are held by HASI Management HoldCo LLC ("HoldCo LLC"). The Reporting Person is a member of HoldCo LLC. The LTIP Units reported represent only the number of LTIP Units in which the Reporting Person has a pecuniary interest in accordance with his proportionate interest in HoldCo LLC. The Reporting Person is voluntarily reporting his proportionate interest in HoldCo LLC's ownership of LTIP Units. The Reporting Person disclaims beneficial ownership other than to the extent of his pecuniary interest.

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