6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6­K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a­16 OR 15d­16 UNDER THE

SECURITIES EXCHANGE ACT OF 1934

For November 3, 2025

Harmony Gold Mining Company Limited

Randfontein Office Park

Corner Main Reef Road and Ward Avenue Randfontein, 1759

South Africa

(Address of principal executive offices)

*-­

(Indicate by check mark whether the registrant files or will file annual reports under cover of

Form 20­ F or Form 40­F.)

Form 20F ☒ Form 40F ☐

(Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3­2(b) under the Securities Exchange Act of 1934.)

Yes ☐ No ☒

Harmony Gold Mining Company Limited

Registration number 1950/038232/06

Incorporated in the Republic of South Africa

ISIN: ZAE000015228

JSE share code: HAR

(“Harmony” and/or “the Company”)

Harmony’s Form 20-F filing

Johannesburg, Monday, 3 November 2025. Further to the announcement made on 24 October 2025, Harmony wishes to advise shareholders that it filed its annual report on a Form 20-F for the year ended 30 June 2025 with the United States Securities and Exchange Commission (“SEC”) on Friday, 31 October 2025.

The document is available on the Company’s website at https://www.harmony.co.za/investors/annual-reports/2025/

and https://www.har.co.za/25/ and the SEC’s website at www.sec.gov.

Ends.

For more details, contact:

Shela Mohatla

Executive: Group Company Secretary

+27 (0) 71 571 4249

Johannesburg, South Africa

3 November 2025

Sponsor:

J.P. Morgan Equities South Africa Proprietary Limited

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on

its behalf by the undersigned, thereunto duly authorized.