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he-2026022700003547070000046207falsefalse00003547072026-02-272026-02-270000354707he:HawaiianElectricCompanyInc.Member2026-02-272026-02-27

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report: February 27, 2026 Exact Name of RegistrantCommissionI.R.S. Employer as Specified in Its CharterFile NumberIdentification No. Hawaiian Electric Industries, Inc.1-850399-0208097 Hawaiian Electric Company, Inc.1-495599-0040500

State of Hawaii (State or other jurisdiction of incorporation) 1001 Bishop Street, Suite 2900, Honolulu, Hawaii  96813 - Hawaiian Electric Industries, Inc. (HEI) 1099 Alakea Street, Suite 2200, Honolulu, Hawaii  96813 - Hawaiian Electric Company, Inc. (Hawaiian Electric) (Address of principal executive offices and zip code) Registrant’s telephone number, including area code:

(808) 543-5662 - HEI

(808) 543-7771 - Hawaiian Electric Not applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to 12(b) of the Act: RegistrantTitle of each classTrading Symbol(s)Name of each exchange on which registered Hawaiian Electric Industries, Inc.Common Stock, Without Par ValueHENew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule12b-2 of the Securities Act of 1934 (§240.12b-2 of this chapter). Emerging growth company Hawaiian Electric Industries, Inc.☐ Hawaiian Electric Company, Inc.☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Hawaiian Electric Industries, Inc. ☐Hawaiian Electric Company, Inc. ☐

Item 2.02 Results of Operations and Financial Condition. On February 27, 2026, HEI issued a news release, “HEI Reports Fourth Quarter and Full Year 2025 Results.” This news release is furnished as HEI Exhibit 99.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

HEI Exhibit 99 News release, dated February 27, 2026, “HEI Reports Fourth Quarter and Full Year 2025 Results”

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

The information furnished in connection with Item 2.02 of this current report on Form 8-K including HEI Exhibit 99 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrants have duly caused this report to be signed on their behalf by the undersigned thereunto duly authorized. The signature of the undersigned companies shall be deemed to relate only to matters having reference to such companies and any subsidiaries thereof.

HAWAIIAN ELECTRIC INDUSTRIES, INC.HAWAIIAN ELECTRIC COMPANY, INC.

(Registrant)(Registrant) /s/ Scott T. DeGhetto/s/ Paul K. Ito Scott T. DeGhettoPaul K. Ito Executive Vice President andSenior Vice President, Chief Financial OfficerChief Financial Officer and Treasurer

Date: February 27, 2026 Date: February 27, 2026

2

he-2025110700003547070000046207falsefalse00003547072025-11-072025-11-070000354707he:HawaiianElectricCompanyInc.Member2025-11-072025-11-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report: November 7, 2025 Exact Name of RegistrantCommissionI.R.S. Employer as Specified in Its CharterFile NumberIdentification No. Hawaiian Electric Industries, Inc.1-850399-0208097 Hawaiian Electric Company, Inc.1-495599-0040500

State of Hawaii (State or other jurisdiction of incorporation) 1001 Bishop Street, Suite 2900, Honolulu, Hawaii  96813 - Hawaiian Electric Industries, Inc. (HEI) 1099 Alakea Street, Suite 2200, Honolulu, Hawaii  96813 - Hawaiian Electric Company, Inc. (Hawaiian Electric) (Address of principal executive offices and zip code) Registrant’s telephone number, including area code:

(808) 543-5662 - HEI

(808) 543-7771 - Hawaiian Electric Not applicable (Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to 12(b) of the Act: RegistrantTitle of each classTrading Symbol(s)Name of each exchange on which registered Hawaiian Electric Industries, Inc.Common Stock, Without Par ValueHENew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule12b-2 of the Securities Act of 1934 (§240.12b-2 of this chapter). Emerging growth company Hawaiian Electric Industries, Inc.☐ Hawaiian Electric Company, Inc.☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Hawaiian Electric Industries, Inc. ☐Hawaiian Electric Company, Inc. ☐

Item 2.02 Results of Operations and Financial Condition. On November 7, 2025, HEI issued a news release, “HEI Reports Third Quarter 2025 Results.” This news release is furnished as HEI Exhibit 99.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

HEI Exhibit 99 News release, dated November 7, 2025, “HEI Reports Third Quarter 2025 Results”

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

The information furnished in connection with Item 2.02 of this current report on Form 8-K including HEI Exhibit 99 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrants have duly caused this report to be signed on their behalf by the undersigned thereunto duly authorized. The signature of the undersigned companies shall be deemed to relate only to matters having reference to such companies and any subsidiaries thereof.

HAWAIIAN ELECTRIC INDUSTRIES, INC.HAWAIIAN ELECTRIC COMPANY, INC.

(Registrant)(Registrant) /s/ Scott T. DeGhetto/s/ Paul K. Ito Scott T. DeGhettoPaul K. Ito Executive Vice President andSenior Vice President, Chief Financial OfficerChief Financial Officer and Treasurer

Date: November 7, 2025 Date: November 7, 2025

2