Report of Foreign Issuer (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 February 27, 2020

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, Thursday, 27 February 2020. 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 3.83(b) of the JSE Limited Listings Requirements, shareholders are hereby advised that Harmony has received formal notification that Fairtree Asset Management (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 Fairtree Asset Management amounted to 5.3876% 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.

For more details contact:

Marian van der Walt

Executive: Investor Relations

+27 (0) 82 888 1242 (mobile)

Johannesburg, South Africa

27 February 2020

Sponsor:

J.P. Morgan Equities South Africa Proprietary Limited.