Report of Foreign Issuer (6-k)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO

RULE 13a-16 OR 15d-16 UNDER THE SECURITIES

EXCHANGE ACT OF 1934

For September 22, 2017

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 40-F.)

Form 20-F ☒

Form 40-F ☐

(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 12g3-2(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”)

HARMONY TO PRESENT AT THE 2017 DENVER GOLD FORUM

Johannesburg. Friday, 22 September 2017 . Harmony Gold Mining Company Limited (“Harmony” and/or “the company”) advises that Harmony’s CEO, Peter Steenkamp, will give a presentation on Harmony at the 2017 Denver Gold Forum on Monday, 25 September 2017.

The presentation will be available from Monday 25 September 2017 on Harmony’s website or https://www.harmony.co.za/investors/news-and-events/presentations-2/presentations-2017 to view the presentation file.

Also note that Harmony will post its latest Investor Brief to its website on the same date as the presentation. Please refer to: https://www.harmony.co.za/investors/news-and-events/investor-brief

Ends.

For more details contact:

Lauren Fourie

Investor Relations Manager

+27 (0) 71 607 1498 (mobile)

22 September 2017

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.