Harmony Gold (NYSE: HMY) advances MAC Copper CSA mine acquisition

Rhea-AI Filing Summary

Harmony Gold Mining Company Limited has moved a major step closer to acquiring MAC Copper Limited, owner of the high-grade CSA Copper mine in New South Wales, after MAC Copper’s shareholders approved the sale of 100% of its issued share capital to a Harmony subsidiary via a Jersey law scheme of arrangement.

The transaction already has approvals from the South African Reserve Bank and the Australian Foreign Investment Review Board and now awaits remaining conditions, including court sanction of the scheme at a hearing scheduled from 9 October 2025 and other customary conditions in the scheme circular. Harmony expects to take control of the CSA mine towards the end of October 2025.

Harmony highlights CSA as an immediately cash flow positive, high-grade, low-cost, long-life copper asset, adding around 40 000 tonnes per annum of high-quality copper to its portfolio. The acquisition will be funded through a mix of cash and debt, and is positioned as enhancing margins, strengthening geographic and commodity diversification, and supporting exposure to copper linked to decarbonisation and energy transition trends.

Positive

• Transformative copper acquisition progresses: Shareholder and key regulatory approvals for buying MAC Copper’s CSA mine advance Harmony’s shift toward a more diversified, cash-generative portfolio with roughly 40 000 tonnes per annum of additional copper production.

Negative

• None.

Insights

Mining M&A and Strategy Analyst

Harmony advances a portfolio-shaping copper acquisition that adds scale and diversification.

Harmony is progressing the acquisition of MAC Copper Limited, which owns the high-grade CSA Copper mine in Australia, through a court-sanctioned scheme of arrangement. MAC Copper’s shareholders have approved the sale of 100% of its issued share capital, and the deal already has clearance from the South African Reserve Bank and the Australian Foreign Investment Review Board, indicating substantial regulatory progress.

The company positions CSA as a high-grade, low-cost, long-life operation that is expected to be immediately cash flow positive and to add about 40 000 tonnes per annum of high-quality copper production. Harmony plans to fund the transaction with a mix of cash and debt facilities or instruments, aiming to maintain balance sheet strength and financial flexibility while expanding into a Tier 1 jurisdiction.

The remaining steps include fulfilment or waiver of conditions linked to a Streams Restructure Deed, court sanction of the scheme at a hearing from 9 October 2025, and other customary conditions. Harmony anticipates taking control of CSA towards the end of October 2025, which would increase its exposure to copper, provide a hedge against gold price volatility, and align the portfolio more closely with energy transition and decarbonisation themes.

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 September 1, 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")

MAJOR STEP TOWARDS QUALITY PORTFOLIO GROWTH: MAC COPPER’S SHAREHOLDERS SUPPORT ACQUISITION BY HARMONY

Johannesburg. Monday, 1 September 2025: Harmony Gold Mining Company Limited (“Harmony” or the “Company”) is pleased to announce that MAC Copper Limited (“MAC Copper”) has received the requisite majority of votes from its shareholders in favour of the proposed sale of 100% of its issued share capital to Harmony Gold (Australia) Pty Ltd by way of a Jersey law scheme of arrangement pursuant to Article 125 of the Companies (Jersey) Law 1991 (as amended) ("Scheme"). MAC Copper is the owner of the high-grade CSA Copper mine (CSA) in Cobar, New South Wales, Australia.

This is further to the approvals obtained from The South African Reserve Bank (SARB) on 5 August 2025 and the Australian Foreign Investment Review Board on 19 August 2025.

A detailed report of the votes cast at the Court Meeting and the General Meeting can be obtained from the announcement given by MAC, available on their website at www.maccopper.com.

“This acquisition accelerates Harmony’s strategy of adding to our portfolio of high-margin, long-life ore bodies. MAC Copper serves as a strategic lever, moving us towards a more resilient, geographically diverse asset portfolio, with copper enhancing cash flow resilience. With our proven expertise in underground mining and exploration, we will unlock further value from CSA,” said Beyers Nel, CEO of Harmony.

Our rationale for acquiring MAC Copper includes:

•Immediately cash flow positive: The CSA Copper mine is a high-grade, long-life asset that will contribute positive cash flow from day one.

•High-grade, low-cost operation: CSA has a quality orebody and its position on the industry cost curve will further enhance margins.

•Quality, long-life production growth addition to Harmony’s portfolio: CSA adds approximately 40 000 tonnes per annum in high-quality copper to the Harmony portfolio.

•Affordability and capital discipline: The transaction will be funded through a mix of cash, debt facilities or debt instruments.

This will leverage Harmony’s strong balance sheet and maintain financial flexibility, without compromising shareholder returns.

•Commodity and geographical diversification and resilience: Copper provides a natural hedge against gold price volatility, strengthening Harmony’s exposure to future-facing metals within a Tier 1 mining jurisdiction, and supports global decarbonisation and energy transition trends.

The Scheme remains subject to the satisfaction of the remaining conditions as outlined in the Scheme Circular. Specifically, it is conditional upon:

•Fulfilment or waiver of certain specified conditions precedent to the Streams Restructure Deed;

•Sanctioning of the Scheme by the Court at the Court Sanction Hearing, scheduled from 9 October 2025; and

•Satisfaction of other customary conditions detailed in the Scheme Circular.

Post the finalisation of the remaining conditions, we anticipate that Harmony will take control of the asset towards the end of October 2025.

Capitalised terms used in this announcement have the meaning given to them in the Scheme Circular, a copy of which is attached to MAC Copper's announcement released on 31 July 2025. A copy of the Scheme Circular is available for viewing on MAC's website at www.maccopperlimited.com.

Please refer to the SENS announcement released on 27 May 2025 for the full details of the transaction. This is available on our website at: www.harmony.co.za.

A corresponding announcement has also been published by MAC Copper and is available on their website at www.maccopperlimited.com.

Further updates will be provided in due course.

For more details, contact:

Jared Coetzer

Head of Investor Relations

+27 (0) 82 746 4120

Johannesburg

1 September 2025

JSE Sponsor

J.P. Morgan Equities South Africa (Pty) Ltd

Ends.

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: September 1, 2025									By: /s/ Boipelo Lekubo
									Name: Boipelo Lekubo
									Title: Financial Director

FAQ

What did Harmony Gold (HMY) announce in this Form 6-K?

Harmony Gold announced that MAC Copper Limited’s shareholders have approved the proposed sale of 100% of MAC Copper’s issued share capital, which owns the high-grade CSA Copper mine in New South Wales, to a Harmony subsidiary via a Jersey law scheme of arrangement.

Which approvals for the MAC Copper acquisition has Harmony Gold (HMY) already obtained?

The acquisition has received approvals from the South African Reserve Bank on 5 August 2025 and the Australian Foreign Investment Review Board on 19 August 2025, in addition to MAC Copper shareholder approval.

What does the CSA Copper mine add to Harmony Gold’s (HMY) portfolio?

The CSA Copper mine is described as a high-grade, low-cost, long-life asset that is expected to be immediately cash flow positive and add approximately 40 000 tonnes per annum of high-quality copper production to Harmony’s portfolio.

How will Harmony Gold (HMY) fund the MAC Copper acquisition?

Harmony states that the MAC Copper transaction will be funded through a mix of cash and debt facilities or debt instruments, aiming to leverage its balance sheet while maintaining financial flexibility.

What conditions still need to be met before Harmony Gold (HMY) can complete the MAC Copper deal?

The scheme remains subject to conditions including fulfilment or waiver of specified conditions precedent to the Streams Restructure Deed, sanctioning of the scheme by the court at a hearing scheduled from 9 October 2025, and other customary conditions set out in the scheme circular.

When does Harmony Gold (HMY) expect to take control of the CSA Copper mine?

Following satisfaction of the remaining conditions, Harmony anticipates taking control of the CSA Copper mine towards the end of October 2025.

Why is Harmony Gold (HMY) acquiring MAC Copper and CSA Copper mine?

Harmony’s rationale includes adding an immediately cash flow positive, high-grade, low-cost, long-life copper asset, enhancing margins, diversifying commodities and geography, and gaining greater exposure to copper linked to global decarbonisation and energy transition trends.