Hawaiian Electric Industries, Inc. (HEI) (NYSE - HE) will announce its first quarter 2026 financial results on Friday, May 8 and conduct a webcast and conference call to discuss the results at 10:30 a.m. Hawaii time (4:30 p.m. Eastern time).

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 15. 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 and Hawaiian Electric'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

HEI provides the energy services that empower much of the economic and community activity of Hawaii. HEI's sole operating company is its electric utility, Hawaiian Electric. 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, and modernize and harden the grid to ensure resilience and public safety. For more information, visit www.hei.com.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260406487573/en/

Mateo Garcia

Director, Investor Relations

Phone: (808) 543-7300

E-mail: ir@hei.com

Hawaiian Electric Industries to Announce First Quarter 2026 Results May 8