X0508 4 2026-02-17 0 0001561894 HA Sustainable Infrastructure Capital, Inc. HASI 0001574200 Eckel Jeffrey ONE PARK PLACE SUITE 200 ANNAPOLIS MD 21401 1 0 0 0 0 Common stock, par value $0.01 per share 2026-02-17 4 S 0 124998 39.22 D 330171 I By Jeffrey W. Eckel Revocable Trust Common stock, par value $0.01 per share 2026-02-17 4 S 0 9400 39.34 D 9050 I By spouse Common stock, par value $0.01 per share 19162 D Common stock, par value $0.01 per share 2887 I By grandson LTIP Units Common stock, par value $0.01 per share 754627 754627 I By HASI Management HoldCo LLC The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.80 to $39.80, inclusive, on February 17, 2026. The reporting person undertakes to provide HA Sustainable Infrastructure Capital, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. These shares are held by the Jeffrey W. Eckel Revocable Trust, of which Jeffrey W. Eckel is the sole trustee and beneficiary. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.26 to $39.46, inclusive, on February 17, 2026. The reporting person undertakes to provide HA Sustainable Infrastructure Capital, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. These shares are held by the reporting person's spouse. The reporting person disclaims ownership other than to the extent of his pecuniary interest. 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. 754,627 units of limited partner interest ("OP Units") in Hannon Armstrong Sustainable Infrastructure, LP (the "Partnership") are issuable upon the vesting and conversion of 754,627 long-term incentive plan units ("LTIP Units") in the Partnership. The LTIP Units were granted to the Reporting Person under the Issuer's 2013 Equity Incentive Plan, as amended, and the Issuer's 2022 Equity Incentive Plan. 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 HA 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. N/A 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. /s/ Jeffrey Eckel 2026-02-17