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 April 20, 2026

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” or the “Company”)

Notification of an acquisition of beneficial interest in securities

Johannesburg, Monday, 20 April 2026. In accordance with section 122(3)(b) of the Companies Act 71 of 2008 (the “Act”), Regulation 121(2)(b) of the Companies Act Regulations, 2011 (the “Regulations”) and paragraph 6.54 of the JSE Limited Listings Requirements, shareholders are hereby advised that Harmony has received formal notification that Ninety One (Pty) Ltd. has, in aggregate, acquired an interest in the ordinary shares of the Company, such that the total interest in the ordinary shares in the Company held by the Ninety One (Pty) Ltd. now amounts to 5.2017% of the total issued shares of the Company.

Harmony has, as required by section 122(3)(a) of the Act filed the required notice with the Takeover Regulation Panel.

The board of directors of Harmony accept responsibility for the information contained in this announcement, having received the TRP121.1 form from Ninety One (Pty) Ltd. and to the best of their knowledge believe the information contained in this announcement is accordingly true.

Ends.

For more details contact:

Jared Coetzer

Head: Investor Relations

+27 (0) 82 746 4120

Johannesburg, South Africa

20 April 2026

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.

Harmony Gold Mining Company Limited

Date: April 20, 2026

By: /s/ Boipelo Lekubo

Name: Boipelo Lekubo

Title: Financial Director

HARMONY GOLD MINING CO LTD 6-K