HEI Exhibit 32.1

Hawaiian Electric Industries, Inc.

Certification Pursuant to

18 U.S.C. Section 1350

In connection with the Quarterly Report of Hawaiian Electric Industries, Inc. (HEI) on Form 10-Q for the quarter ended September 30, 2024, as filed with the Securities and Exchange Commission (the Report), each of Scott W. H. Seu and Scott T. DeGhetto, Chief Executive Officer and Chief Financial Officer, respectively, of HEI, certify, pursuant to 18 U.S.C. Section 1350, that to the best of our knowledge:

(1)   The Report complies with the requirements of section 13(a) of the Securities Exchange Act of 1934, as amended; and

(2)   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of HEI and its subsidiaries as of, and for, the periods presented in this report.

Date: November 8, 2024

/s/ Scott W. H. Seu

Scott W. H. Seu

President and Chief Executive Officer

/s/ Scott T. DeGhetto

Scott T. DeGhetto

Executive Vice President, Chief Financial Officer and Treasurer

A signed original of this written statement has been provided to HEI and will be retained by HEI and furnished to the Securities and Exchange Commission or its staff upon request.