Hawaiian Electric Industries to Announce First Quarter 2024 Results May 10; American Savings Bank to Announce First Quarter 2024 Results April 30

Hawaiian Electric Industries, Inc. (HEI) (NYSE - HE) will announce its first quarter 2024 financial results on Friday, May 10 and conduct a webcast and conference call to discuss the results at 10:30 a.m. Hawaii time (4:30 p.m. Eastern time). In addition, American Savings Bank, F.S.B. (ASB), a wholly owned indirect subsidiary of HEI, will announce its first quarter 2024 financial results on Tuesday, April 30.

To listen to the conference call, dial 1-888-660-6377 (U.S.) or 1-929-203-0797 (international) and enter passcode 2393042. Parties may also access presentation materials and/or listen to the conference call by visiting the conference call link on HEI's website at www.hei.com under "Investor Relations," sub-heading "News and Events ? Events and Presentations."

A replay will be available online and via phone. The online replay will be available on HEI's website about two hours after the event. An audio replay will also be available about two hours after the event through May 24. To access the audio replay, dial 1-800-770-2030 (U.S.) or 1-647-362-9199 (international) and enter passcode 2393042.

HEI and Hawaiian Electric Company, Inc. (Hawaiian Electric) intend to continue to use HEI's website, www.hei.com, as a means of disclosing additional information; such disclosures will be included in the Investor Relations section of the website. Accordingly, investors should routinely monitor the Investor Relations section of HEI's website, in addition to following HEI's, Hawaiian Electric's and ASB's press releases, HEI's and Hawaiian Electric's Securities and Exchange Commission (SEC) filings and HEI's public conference calls and webcasts. Investors may sign up to receive e-mail alerts via the Investor Relations section of the website. The information on HEI's website is not incorporated by reference into this document or into HEI's and Hawaiian Electric's SEC filings unless, and except to the extent, specifically incorporated by reference.

Investors may also wish to refer to the Public Utilities Commission of the State of Hawaii (PUC) website at https://hpuc.my.site.com/cdms/s/ to review documents filed with, and issued by, the PUC. No information on the PUC website is incorporated by reference into this document or into HEI's and Hawaiian Electric's SEC filings.

About HEI

The HEI family of companies provides the energy and financial services that empower much of the economic and community activity of Hawaii. HEI's electric utility, Hawaiian Electric, supplies power to approximately 95% of Hawaii's population and is undertaking an ambitious effort to decarbonize its operations and the broader state economy. Its banking subsidiary, ASB, is one of Hawaii's largest financial institutions, providing a wide array of banking and other financial services and working to advance economic growth, affordability and financial fitness. HEI also helps advance Hawaii's sustainability goals through investments by its non-regulated subsidiary, Pacific Current. For more information, visit www.hei.com.