Armbrister Clarence D 4

What Happened

• Clarence D. Armbrister, a director of HA Sustainable Infrastructure Capital, Inc. (HASI), was granted/awarded 3,553 derivative units on 2026-06-03. The reported acquisition price is $0.00 (transaction code A — award/grant). This is a compensation/award-type transaction rather than an open-market purchase or sale.

Key Details

• Transaction date and price: 2026-06-03; 3,553 units @ $0.00 (award).
• Filing date: 2026-06-05 reporting the 06-03 transaction (filed within the Form 4 reporting window).
• Shares/units owned after transaction: Not specified in this Form 4.
• Notable footnotes:
  • F1: Includes 36 shares of common stock acquired via dividend reinvestment since the last Section 16 filing.
  • F2: 23,551 partnership units (OP Units) are issuable upon vesting/conversion of 23,551 LTIP Units the Reporting Person holds in the Partnership.
  • F3: Vested LTIP Units convert to OP Units one-for-one; converted OP Units may be redeemed for cash equal to the market value of an equivalent number of HASI common shares, or — at the Issuer’s option — converted into HASI common shares on a one-for-one basis (subject to the Partnership Agreement).
• Exhibit/authorization: Exhibit 24.1 Power of Attorney dated April 30, 2026 included.

Context

• This filing reports an award of derivative/long-term incentive units (not a cash purchase or sale). Per the partnership agreement, these LTIP units can convert into partnership OP Units, and upon conversion the holder may receive cash tied to the market value of HASI shares or receive shares directly. Such awards are typically compensation-related; they do not by themselves indicate a buy or sell signal.