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[6-K] HARMONY GOLD MINING CO LTD Current Report (Foreign Issuer)

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Rhea-AI Filing Summary

Harmony Gold Mining Company Limited completed its acquisition of MAC Copper Limited, securing full ownership of the high-grade CSA copper mine in New South Wales, Australia. Harmony acquired 100% of MAC’s securities at US$12.25 per share, implying a total equity value of US$1.01 billion. The purchase was funded with cash reserves and a US$1.25 billion bridge facility.

Integration of CSA into Harmony’s portfolio begins immediately, with a three-month embedding phase to align planning and performance frameworks and target operational synergies. Management plans to provide a detailed update on CSA’s operational performance and development milestones at the H1FY26 results presentation in late February or early March 2026. Updated FY26 production guidance will include CSA, and a CSA life‑of‑mine plan aligned to Harmony’s FY27 planning parameters is expected alongside FY26 results in August 2026.

Harmony Gold Mining Company Limited ha completato l'acquisizione di MAC Copper Limited, assicurando la piena proprietà della miniera di rame CSA ad alta qualità in New South Wales, Australia. Harmony ha acquisito il 100% delle azioni di MAC al prezzo di US$12,25 per azione, implicando una valore complessivo di capitale di US$1,01 miliardo. L'acquisto è stato finanziato con riserve di cassa e una facilità ponte da US$1,25 miliardo.

L'integrazione di CSA nel portafoglio di Harmony inizia subito, con una fase di embedment di tre mesi per allineare la pianificazione e i quadri prestazionali e puntare alle sinergie operative. La direzione prevede di fornire un aggiornamento dettagliato sulle prestazioni operative di CSA e sugli milestones di sviluppo nella presentazione dei risultati H1FY26 a fine febbraio o inizio marzo 2026. La guidance di produzione FY26 aggiornata includerà CSA, e un piano di vita utile di CSA allineato ai parametri di pianificazione FY27 è previsto insieme ai risultati FY26 ad agosto 2026.

Harmony Gold Mining Company Limited completó la adquisición de MAC Copper Limited, asegurando la propiedad total de la mina de cobre CSA de alto grado en Nueva Gales del Sur, Australia. Harmony adquirió el 100% de los valores de MAC a US$12,25 por acción, lo que implica un valor total de capital de US$1,01 mil millones. La compra fue financiada con reservas de efectivo y una línea puente de US$1,25 mil millones.

La integración de CSA en el portafolio de Harmony comienza de inmediato, con una fase de implementación de tres meses para alinear la planificación y los marcos de rendimiento y apuntar a sinergias operativas. La dirección planea proporcionar una actualización detallada sobre el rendimiento operativo de CSA y los hitos de desarrollo en la presentación de resultados H1FY26 a finales de febrero o principios de marzo de 2026. La guía de producción actualizada para FY26 incluirá CSA, y se espera un plan de vida útil de CSA alineado a los parámetros de planificación FY27 junto con los resultados FY26 en agosto de 2026.

Harmony Gold Mining Company LimitedMAC Copper Limited의 인수를 완료해 뉴사우스웨일스 주, 호주에 위치한 고품질 CSA 구리 광산의 완전한 소유권을 확보했습니다. Harmony는 MAC의 100% 주식을 주당 US$12.25에 인수했고, 이는 총 지분 가치 US$1.01십억에 해당합니다. 이번 거래는 현금 보유액과 미화 12.5억 달러의 브리지 파이낸스로 조달되었습니다.

CSA를 Harmony의 포트폴리오에 즉시 통합하기 시작하며, 계획 수립 및 성과 프레임워크를 정렬하고 운영 시너지를 목표로 3개월의 임베딩(구현) 단계를 거칠 예정입니다. 경영진은 2026년 2월 말 또는 3월 초에 열리는 1HFY26 실적 발표에서 CSA의 운영 실적 및 개발 이정표에 대한 자세한 업데이트를 제공할 계획입니다. FY26 생산 전망 업데이트에는 CSA가 포함될 것이며, FY27 계획 매개변수에 맞춘 CSA 생애주기 계획은 2026년 8월 FY26 실적 발표와 함께 제시될 예정입니다.

Harmony Gold Mining Company Limited a terminé l'acquisition de MAC Copper Limited, assurant la pleine propriété de la mine de cuivre CSA à haut grade située en Nouvelle-Galles du Sud, Australie. Harmony a acquis 100% des titres de MAC à US$12,25 par action, ce qui implique une valeur d'équité totale de US$1,01 milliard. L'achat a été financé avec des réserves de trésorerie et une facilité pont de US$1,25 milliard.

L'intégration de CSA dans le portefeuille de Harmony commence immédiatement, avec une phase d'implantation de trois mois pour aligner la planification et les cadres de performance et viser des synergies opérationnelles. La direction prévoit de fournir une mise à jour détaillée sur la performance opérationnelle de CSA et les jalons de développement lors de la présentation des résultats H1FY26 fin février ou début mars 2026. Les prévisions de production révisées pour FY26 incluront CSA, et un plan de vie de CSA aligné sur les paramètres de planification FY27 est attendu aux côtés des résultats FY26 en août 2026.

Harmony Gold Mining Company Limited hat die Übernahme von MAC Copper Limited abgeschlossen und besitzt nun vollständig die hochwertig gelegene CSA–Kupfermine in New South Wales, Australien. Harmony erwarb 100% der MAC-Wertpapiere zu US$12,25 pro Aktie, was einen Gesamtaktienwert von US$1,01 Mrd. impliziert. Die Finanzierung des Kaufs erfolgte aus Barreserven und einer US$1,25 Mrd. Bridge-Fazilität.

Die Integration von CSA in Harmonys Portfolio beginnt sofort, mit einer dreimonatigen Einbettungsphase, um Planung und Leistungsrahmen abzugleichen und betriebliche Synergien anzustreben. Das Management plant, ein detailliertes Update zur operativen Leistung von CSA und zu Entwicklungsmeilensteinen bei der H1FY26-Ergebnispräsentation Ende Februar/Anfang März 2026 zu geben. Die aktualisierte FY26-Produktionsführung wird CSA beinhalten, und ein CSA-Lebenszyklusplan, der auf die Planungsparameter von FY27 abgestimmt ist, wird voraussichtlich zusammen mit den FY26-Ergebnissen im August 2026 veröffentlicht.

Harmony Gold Mining Company Limited أكملت استحواذها على MAC Copper Limited، مؤكدة الملكية الكاملة ل mine CSA النحاس عالي الجودة في نيو ساوث ويلز، أستراليا. اشترت Harmony 100% من أوراق MAC بسعر US$12.25 للسهم، مما يعني قيمة حقوق ملكية إجمالية قدرها US$1.01 مليار. تم تمويل الشراء من خلال احتياطيات نقدية وتسهيل جسر بقيمة US$1.25 مليار.

سيبدأ دمج CSA في محفظة Harmony على الفور، مع فترة تبني مدتها ثلاثة أشهر لمواءمة التخطيط وأطر الأداء واستهداف التآزر التشغيلي. تخطط الإدارة لتقديم تحديث مفصل عن أداء CSA التشغيلي ومعالم التطوير في عرض نتائج H1FY26 في أواخر فبراير أو أوائل مارس 2026. ستشمل توجيهات الإنتاج FY26 المحدثة CSA، ومن المتوقع أن يتم تقديم خطة دورة حياة CSA المتوافقة مع معايير تخطيط FY27 جنبًا إلى جنب مع نتائج FY26 في أغسطس 2026.

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Insights

Large copper acquisition closed; integration and funding in focus.

Harmony closed the purchase of MAC Copper (CSA mine) at US$12.25 per share, valuing equity at US$1.01 billion. The company adds an operating, high‑grade copper asset in a Tier‑1 jurisdiction, consistent with its gold‑and‑copper strategy.

Funding includes cash reserves and a US$1.25 billion bridge facility. While copper diversification can support long‑term growth, balance sheet implications depend on the bridge’s tenor, refinancing terms, and CSA’s cash generation, which are not detailed here.

Integration runs over three months, with a CSA performance update at H1FY26 results (late February or early March 2026) and a CSA life‑of‑mine plan expected with FY26 results in August 2026. Actual impact will hinge on achieved synergies and delivered volumes once guidance is updated.

Harmony Gold Mining Company Limited ha completato l'acquisizione di MAC Copper Limited, assicurando la piena proprietà della miniera di rame CSA ad alta qualità in New South Wales, Australia. Harmony ha acquisito il 100% delle azioni di MAC al prezzo di US$12,25 per azione, implicando una valore complessivo di capitale di US$1,01 miliardo. L'acquisto è stato finanziato con riserve di cassa e una facilità ponte da US$1,25 miliardo.

L'integrazione di CSA nel portafoglio di Harmony inizia subito, con una fase di embedment di tre mesi per allineare la pianificazione e i quadri prestazionali e puntare alle sinergie operative. La direzione prevede di fornire un aggiornamento dettagliato sulle prestazioni operative di CSA e sugli milestones di sviluppo nella presentazione dei risultati H1FY26 a fine febbraio o inizio marzo 2026. La guidance di produzione FY26 aggiornata includerà CSA, e un piano di vita utile di CSA allineato ai parametri di pianificazione FY27 è previsto insieme ai risultati FY26 ad agosto 2026.

Harmony Gold Mining Company Limited completó la adquisición de MAC Copper Limited, asegurando la propiedad total de la mina de cobre CSA de alto grado en Nueva Gales del Sur, Australia. Harmony adquirió el 100% de los valores de MAC a US$12,25 por acción, lo que implica un valor total de capital de US$1,01 mil millones. La compra fue financiada con reservas de efectivo y una línea puente de US$1,25 mil millones.

La integración de CSA en el portafolio de Harmony comienza de inmediato, con una fase de implementación de tres meses para alinear la planificación y los marcos de rendimiento y apuntar a sinergias operativas. La dirección planea proporcionar una actualización detallada sobre el rendimiento operativo de CSA y los hitos de desarrollo en la presentación de resultados H1FY26 a finales de febrero o principios de marzo de 2026. La guía de producción actualizada para FY26 incluirá CSA, y se espera un plan de vida útil de CSA alineado a los parámetros de planificación FY27 junto con los resultados FY26 en agosto de 2026.

Harmony Gold Mining Company LimitedMAC Copper Limited의 인수를 완료해 뉴사우스웨일스 주, 호주에 위치한 고품질 CSA 구리 광산의 완전한 소유권을 확보했습니다. Harmony는 MAC의 100% 주식을 주당 US$12.25에 인수했고, 이는 총 지분 가치 US$1.01십억에 해당합니다. 이번 거래는 현금 보유액과 미화 12.5억 달러의 브리지 파이낸스로 조달되었습니다.

CSA를 Harmony의 포트폴리오에 즉시 통합하기 시작하며, 계획 수립 및 성과 프레임워크를 정렬하고 운영 시너지를 목표로 3개월의 임베딩(구현) 단계를 거칠 예정입니다. 경영진은 2026년 2월 말 또는 3월 초에 열리는 1HFY26 실적 발표에서 CSA의 운영 실적 및 개발 이정표에 대한 자세한 업데이트를 제공할 계획입니다. FY26 생산 전망 업데이트에는 CSA가 포함될 것이며, FY27 계획 매개변수에 맞춘 CSA 생애주기 계획은 2026년 8월 FY26 실적 발표와 함께 제시될 예정입니다.

Harmony Gold Mining Company Limited a terminé l'acquisition de MAC Copper Limited, assurant la pleine propriété de la mine de cuivre CSA à haut grade située en Nouvelle-Galles du Sud, Australie. Harmony a acquis 100% des titres de MAC à US$12,25 par action, ce qui implique une valeur d'équité totale de US$1,01 milliard. L'achat a été financé avec des réserves de trésorerie et une facilité pont de US$1,25 milliard.

L'intégration de CSA dans le portefeuille de Harmony commence immédiatement, avec une phase d'implantation de trois mois pour aligner la planification et les cadres de performance et viser des synergies opérationnelles. La direction prévoit de fournir une mise à jour détaillée sur la performance opérationnelle de CSA et les jalons de développement lors de la présentation des résultats H1FY26 fin février ou début mars 2026. Les prévisions de production révisées pour FY26 incluront CSA, et un plan de vie de CSA aligné sur les paramètres de planification FY27 est attendu aux côtés des résultats FY26 en août 2026.

Harmony Gold Mining Company Limited hat die Übernahme von MAC Copper Limited abgeschlossen und besitzt nun vollständig die hochwertig gelegene CSA–Kupfermine in New South Wales, Australien. Harmony erwarb 100% der MAC-Wertpapiere zu US$12,25 pro Aktie, was einen Gesamtaktienwert von US$1,01 Mrd. impliziert. Die Finanzierung des Kaufs erfolgte aus Barreserven und einer US$1,25 Mrd. Bridge-Fazilität.

Die Integration von CSA in Harmonys Portfolio beginnt sofort, mit einer dreimonatigen Einbettungsphase, um Planung und Leistungsrahmen abzugleichen und betriebliche Synergien anzustreben. Das Management plant, ein detailliertes Update zur operativen Leistung von CSA und zu Entwicklungsmeilensteinen bei der H1FY26-Ergebnispräsentation Ende Februar/Anfang März 2026 zu geben. Die aktualisierte FY26-Produktionsführung wird CSA beinhalten, und ein CSA-Lebenszyklusplan, der auf die Planungsparameter von FY27 abgestimmt ist, wird voraussichtlich zusammen mit den FY26-Ergebnissen im August 2026 veröffentlicht.

Harmony Gold Mining Company Limited أكملت استحواذها على MAC Copper Limited، مؤكدة الملكية الكاملة ل mine CSA النحاس عالي الجودة في نيو ساوث ويلز، أستراليا. اشترت Harmony 100% من أوراق MAC بسعر US$12.25 للسهم، مما يعني قيمة حقوق ملكية إجمالية قدرها US$1.01 مليار. تم تمويل الشراء من خلال احتياطيات نقدية وتسهيل جسر بقيمة US$1.25 مليار.

سيبدأ دمج CSA في محفظة Harmony على الفور، مع فترة تبني مدتها ثلاثة أشهر لمواءمة التخطيط وأطر الأداء واستهداف التآزر التشغيلي. تخطط الإدارة لتقديم تحديث مفصل عن أداء CSA التشغيلي ومعالم التطوير في عرض نتائج H1FY26 في أواخر فبراير أو أوائل مارس 2026. ستشمل توجيهات الإنتاج FY26 المحدثة CSA، ومن المتوقع أن يتم تقديم خطة دورة حياة CSA المتوافقة مع معايير تخطيط FY27 جنبًا إلى جنب مع نتائج FY26 في أغسطس 2026.

Harmony Gold Mining Company Limited 已完成对 MAC Copper Limited 的收购,获得位于澳大利亚新南威尔士州的高品位 CSA 铜矿的全部所有权。 Harmony 以 每股 12.25 美元 的价格收购了 MAC 的 100% 证券,等同于 总股本价值 10.1 亿美元。此次交易资金来自现金储备以及一笔 12.5 亿美元的过渡性信贷

CSA 的整合将立即进入 Harmony 的产品组合,设有三个月的嵌入阶段,以对齐计划与绩效框架并实现运营协同。管理层计划在 2026 年 2 月底或 3 月初举行的 H1FY26 业绩发布会上就 CSA 的运营绩效和开发里程碑提供详细更新。更新后的 FY26 产量指引将包含 CSA,且预计在 2026 年 8 月与 FY26 业绩一同发布的,还有与 HarmonyFY27 规划参数对齐的 CSA 全生命周期计划。





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 October 24, 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 Ltd
Registration number: 1950/038232/06
Incorporated in the Republic of South Africa
ISIN: ZAE000015228
JSE share code: HAR
(“Harmony” or the “company”)

Harmony completes MAC Copper acquisition, securing full ownership of CSA mine and unlocking immediate copper production

Johannesburg. Friday, 24 October 2025. Harmony Gold Mining Company Limited (“Harmony” or “the Company”) is pleased to announce the successful completion of the acquisition of MAC Copper Limited (“MAC”), the owner of the high-grade CSA copper mine (“CSA mine”) in New South Wales, Australia, through its wholly owned Australian subsidiary Harmony Gold (Australia) Pty Limited.

The transaction, first announced on 27 May 2025, was implemented today, 24 October 2025 via a Jersey law Scheme of Arrangement pursuant to Article 125 of the Companies (Jersey) Law 1991 (as amended). Harmony has acquired 100% of MAC’s securities at a price of US$12.25 per share, implying a total equity value of US$1.01 billion (approximately R18.4 billion).

This transaction has been funded using cash reserves together with a US$1.25 billion bridge facility.

“Harmony is one of the world’s leading gold producers with a proud 75-year operating history and more than two decades of experience in Australia and Papua New Guinea. Our proven operating model – extending the life of mines through disciplined investment in our orebodies and our people – has consistently delivered long-term value for all stakeholders, making us the partner of choice wherever we operate.

We are delighted to welcome the CSA mine employees to the Harmony family. The completion of this acquisition marks a significant milestone in our strategy to grow into a global gold and copper producer, reinforcing our commitment to sustainable value creation. CSA is a high-grade, long-life copper asset located in a Tier-1 jurisdiction. This asset will meaningfully enhance our business and support our long-term growth,” says Beyers Nel, Harmony Chief Executive Officer.

The integration of the CSA mine into the Harmony portfolio will now commence. Over the next three months, Harmony will be embedding the mine into the broader Harmony Group, aligning its operations with our proven planning and performance frameworks. This process is designed to unlock synergies, enhance operational efficiency, and position CSA to contribute meaningfully to Harmony’s long-term value creation. A detailed update on operational performance and key development milestones including the ventilation project, upper Merrin mine development and exploration activities through December



2025 will be provided at Harmony’s half-year results (H1FY26) presentation scheduled for late February or early March 2026.
At that time, we will also update our FY26 production guidance to incorporate the CSA mine figures.

Harmony’s planning parameters for FY27 will be embedded into CSA mine to develop its FY27 life-of-mine plan, in alignment with the planning approach used across our other operations. The CSA mine life-of-mine plan will be released alongside our FY26 results expected in August 2026.

For full details of the transaction, please refer to the SENS announcement published on 27 May 2025, available on our website at: www.harmony.co.za

Jared Coetzer
Head of Investor Relations
+27 (0) 82 746 4120

Johannesburg, South Africa
24 October 2025

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

About Harmony
Harmony, a world-class gold and copper mining and development company, operates and has assets in South Africa, Australia, and Papua New Guinea (PNG). Harmony is South Africa’s largest gold producer by volume and company assets include nine underground mines, one open pit operation and several surface retreatment operations in South Africa, one open pit mine and several exploration tenements in PNG, and now an operating copper mine in Australia.

The company’s primary stock exchange listing is on the JSE with a secondary listing on the New York Stock Exchange. The bulk of our shareholders are in South Africa and the United States. Additional information on the company is available on the corporate website.
https://www.harmony.co.za/

About MAC Copper
MAC Copper Limited (NYSE: MTAL) is a company focused on operating and acquiring metals and mining businesses in high quality, stable jurisdictions that are critical in the electrification and decarbonisation of the global economy.
https://maccopperlimited.com/




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: October 24, 2025By: /s/ Boipelo Lekubo
Name: Boipelo Lekubo
Title: Financial Director

FAQ

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

Harmony acquired 100% of MAC Copper Limited, owner of the high-grade CSA copper mine in New South Wales, Australia.

What was the purchase price and valuation for MAC Copper?

Harmony paid US$12.25 per share, implying a total equity value of US$1.01 billion.

How was the MAC Copper acquisition financed by Harmony (HMY)?

The transaction was funded using cash reserves and a US$1.25 billion bridge facility.

When will Harmony update guidance to include CSA mine output?

Harmony plans to update FY26 production guidance to include CSA at its H1FY26 results in late February or early March 2026.

What integration steps are planned for the CSA mine?

A three‑month integration to align CSA with Harmony’s planning and performance frameworks, targeting synergies and operational efficiency.

When will the CSA life-of-mine plan be released?

Harmony expects to release the CSA life-of-mine plan alongside its FY26 results in August 2026.

What jurisdictions does Harmony operate in after this deal?

Harmony operates in South Africa, Australia, and Papua New Guinea, now including an operating copper mine in Australia.
Harmony Gold Mng

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