MAC Copper Limited ARBN 671 963 198 (NYSE: MTAL; ASX:MAC)

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MAC Copper Limited (NYSE: MTAL, ASX:MAC) (“MAC” or the “Company”) is pleased to announce that it has today lodged with the Jersey Registrar of Companies a copy of the order of the Royal Court of Jersey (the “Court”) sanctioning the proposed acquisition of 100% of the issued share capital in MAC by Harmony Gold (Australia) Pty Ltd (a wholly owned subsidiary of Harmony Gold Mining Company Limited (JSE:HAR, NYSE: HMY)) (“Harmony”) by way of a Jersey law scheme of arrangement pursuant to Article 125 of the Companies (Jersey) Law 1991 (as amended) (“Scheme”).

As a result, the Scheme is now legally effective. A copy of the Court’s order as lodged with Jersey Registrar of Companies is attached to this announcement.

Capitalised terms used in this announcement have the meaning given to them in the Scheme Circular, a copy of which is attached to MAC’s announcement released on 31 July 2025.

Suspension of trading

MAC CDIs will be suspended from trading on the ASX with effect from close of trading today, 10 October 2025.

Today will also be the last day of dealings in MAC Shares on the NYSE.

Scheme Consideration

MAC Securityholders who hold MAC Shares or MAC CDIs at the Scheme Record Date, being 7:00 pm (Sydney time) on 17 October 2025 (for MAC CDI Holders) or 5:00 pm (New York time) on 17 October 2025 (for Scheme Shareholders) will be paid the Scheme Consideration in accordance with the terms of the Scheme. It is anticipated that the Scheme will be implemented on 24 October 2025.

Indicative Scheme timetable

The remaining key dates expected for the Scheme are set out below.

¹ MAC CDI Holders may sell their MAC CDIs on the ASX until ASX market close on October 10, 2025 (at which point the ASX is expected to halt and suspend trading in MAC CDIs before start of trade on ASX on October 13, 2025).

² Shareholders may sell their MAC Shares on the NYSE until NYSE market close on October 10, 2025 (at which point the NYSE is expected to halt and cease trading in MAC Shares).

³ NYSE files a Delisting Application (Form 25-NSE) with the SEC.

Further information

If, after reading the Scheme Circular, you have any questions about the payment of the Scheme Consideration, please contact MAC’s Share Registry or CDI Registry (as applicable), at:

This announcement has been authorised for release by Mick McMullen, CEO and Director.

About MAC Copper Limited

MAC Copper Limited (NYSE: MTAL; ASX:MAC) is a company focused on operating and acquiring metals and mining businesses in high quality, stable jurisdictions that are critical in the electrification and decarbonization of the global economy.

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