# EDGAR Filing Document

**Accession Number:** 0001950246
**File Stem:** 0001104659-25-096911
**Filing Date:** 2025-10
**Character Count:** 11152
**Document Hash:** 77c9edbac12a98c799035780189fba3a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-096911.hdr.sgml**: 20251006

**ACCESSION NUMBER**: 0001104659-25-096911

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 5

**CONFORMED PERIOD OF REPORT**: 20251006

**FILED AS OF DATE**: 20251006

**DATE AS OF CHANGE**: 20251006

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MAC Copper Ltd
- **CENTRAL INDEX KEY:** 0001950246
- **STANDARD INDUSTRIAL CLASSIFICATION:** METAL MINING [1000]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** Y9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41722
- **FILM NUMBER:** 251375565

**BUSINESS ADDRESS:**
- **STREET 1:** 3RD FLOOR
- **STREET 2:** 44 ESPLANADE, ST
- **CITY:** ST. HELIER
- **STATE:** Y9
- **ZIP:** JE4 9WG
- **BUSINESS PHONE:** 8176989901

**MAIL ADDRESS:**
- **STREET 1:** 3RD FLOOR
- **STREET 2:** 44 ESPLANADE, ST
- **CITY:** ST. HELIER
- **STATE:** Y9
- **ZIP:** JE4 9WG

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Metals Acquisition Ltd
- **DATE OF NAME CHANGE:** 20221011

**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 <br> of the Securities Exchange Act of 1934**

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| | | |
|:---|:---|:---|
| For the month of | **October** | **2025** |
| Commission File Number | **001-41722** |  |

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| |
|:---|
| **MAC COPPER LIMITED** |
| (Translation of registrant's name into English) |
| **3rd Floor, 44 Esplanade<br> St. Helier, Jersey, JE4 9WG<br> Tel: +(817) 698-9901** |
| (Address of principal executive offices) |

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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 ◻

**Incorporation By Reference**

This Report on Form 6-K, including all exhibits hereto, shall be deemed to be incorporated by reference into the registration statement on Form F-3 (Registration No. 333-276216) (including any prospectuses forming a part of such registration statement) and to be a part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

**EXHIBIT INDEX**

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| | |
|:---|:---|
| **Exhibit** | **Description of Exhibit** |
| [99.1](tm2528020d1_ex99-1.htm) | [Press Release of MAC Copper Limited dated October 6, 2025](tm2528020d1_ex99-1.htm) |

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**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.

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| | | | | |
|:---|:---|:---|:---|:---|
| | | **MAC COPPER LIMITED** | **MAC COPPER LIMITED** | **MAC COPPER LIMITED** |
| | | (Registrant) | (Registrant) | (Registrant) |
| Date: | October 6, 2025 | By: | /s/ Michael James McMullen | /s/ Michael James McMullen |
|  |  |  | Name: | Michael James McMullen |
|  |  |  | Title: | Chief Executive Officer |

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## Exhibit 99.1

**Exhibit 99.1**

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| | |
|:---|:---|
| ![](tm2528020d1_ex99-1img001.jpg) | ![](tm2528020d1_ex99-1img002.jpg) |

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6 October 2025

**MAC Copper Limited Provides Closing Timetable for Scheme with Harmony**

ST. HELIER, Jersey – (BUSINESS WIRE) – MAC Copper Limited ARBN 671 963 198 (NYSE:MTAL; ASX:MAC)

MAC Copper Limited (NYSE:MTAL, ASX:MAC) ("**MAC**" or the "**Company**") is pleased to provide the following update on 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**").

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.

**Proposed closing timetable for the Transaction**

Subject to the Court making orders sanctioning the Scheme at the Court Sanction Hearing scheduled to be held at 10:00 am (Jersey time) on 9 October 2025, the proposed closing timetable for the Transaction is as follows:

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| | |
|:---|:---|
| &nbsp;&nbsp;**Event** | &nbsp;&nbsp;**Date and time (Jersey time)<sup>1</sup>** |
| &nbsp;&nbsp;Conversion of MAC CDIs into MAC Shares ceases | &nbsp;&nbsp;4:00 pm (Sydney time) on 9 October 2025 |
| &nbsp;&nbsp;Conversion of MAC Shares into MAC CDIs ceases | &nbsp;&nbsp;4:00 pm (New York time) on 9 October 2025 |
| &nbsp;&nbsp;Effective Date | &nbsp;&nbsp;10 October 2025 |
| &nbsp;&nbsp;Last day of dealings in MAC CDIs on the ASX<sup>2</sup> | &nbsp;&nbsp;10 October 2025 (close of trading on the ASX) |
| &nbsp;&nbsp;Last day of dealings in MAC Shares on the NYSE<sup>3</sup> | &nbsp;&nbsp;10 October 2025 (close of trading on the NYSE) |
| &nbsp;&nbsp;Suspension of quotation of MAC CDIs on the ASX | &nbsp;&nbsp;13 October 2025 (before trading opens on the ASX) |
| &nbsp;&nbsp;Initiate delisting of MAC Shares from the NYSE<sup>4</sup> | &nbsp;&nbsp;14 October 2025 (before trading opens on the NYSE) |
| &nbsp;&nbsp;Scheme Record Time | &nbsp;&nbsp;5:00 pm (New York time) on 17 October 2025 for Scheme Shareholders<br> 7:00 pm (Sydney time) on 17 October 2025 for MAC CDI Holders |
| &nbsp;&nbsp;Complete delisting of MAC Shares from the NYSE | &nbsp;&nbsp;24 October 2025 |
| &nbsp;&nbsp;Implementation Date | &nbsp;&nbsp;24 October 2025 |
| &nbsp;&nbsp;Consideration payment date to DTC for further payment by DTC participants to beneficial owners holding MAC Shares within DTC | &nbsp;&nbsp;27 October 2025 |
| &nbsp;&nbsp;Consideration payment date for MAC Shares held outside DTC | &nbsp;&nbsp;31 October 2025 |
| &nbsp;&nbsp;Consideration payment date for MAC CDIs | &nbsp;&nbsp;31 October 2025 |
| &nbsp;&nbsp;Delisting of MAC from the ASX | &nbsp;&nbsp;3 November 2025 |

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*<sup>1</sup> All dates and times are based on MAC and Harmony's current expectations and are subject to change. If any of the dates and/or times in this timetable change materially, the revised dates and/or times will be published by a public announcement filed with, or furnished to, the SEC and released to the ASX and by making such announcement available on MAC's website at www.maccopperlimited.com.*

*<sup>2</sup> 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).*

*<sup>3</sup> 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).*

*<sup>4</sup> NYSE files a Delisting Application (Form 25-NSE) with the SEC.*

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| | | | |
|:---|:---|:---|:---|
| ![](tm2528020d1_ex99-1img003.jpg) | **MAC Copper Limited**<br> maccopperlimited.com | 3rd Floor, 44 Esplanade, <br> St Helier, Jersey, JE4 | Page 1 |

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![](tm2528020d1_ex99-1img002.jpg)

**Payment of Scheme Consideration**

The Scheme Consideration will be paid to each Scheme Shareholder (excluding CDN) and MAC CDI Holder entitled to receive the Scheme Consideration pursuant to the Scheme in the ordinary course and in accordance with any valid existing payment instructions held by the Share Registry and CDI Registry (as applicable) at the Scheme Record Time. Accordingly, such payments will be made as follows:

● payments to Scheme Shareholders who hold their MAC Shares through DTC will be made in U.S. dollars in accordance with the individual arrangements between the Scheme Shareholders and their respective brokers, banks, trustees, custodians or other nominees;

● payments to Scheme Shareholders will otherwise be made as follows:

if a Scheme Shareholder has, before the Scheme Record Time, provided the Share Registry with wire instructions in accordance with the requirements of the Share Registry, paying, or procuring the payment of, the relevant amount in U.S. dollars, by electronic means in accordance with that instruction; or

dispatching, or procuring the dispatch of, a cheque drawn on a U.S. bank in U.S. dollars for the relevant amount to the Scheme Shareholder by prepaid ordinary post to their registered address, such cheque being drawn in the name of the Scheme Shareholder; and

● payments to MAC CDI Holders will be made as follows:

if a MAC CDI Holder has, before the Scheme Record Time, made a valid election in accordance with the requirements of the CDI Registry to receive dividend payments from MAC by electronic funds transfer to a bank account nominated by the MAC CDI Holder, by paying, or procuring the payment of, the relevant amount in Australian dollars by electronic means in accordance with that election;

by dispatching, or procuring the dispatch of, a cheque drawn on an Australian bank in Australian dollars for the relevant amount to the MAC CDI Holder by prepaid ordinary post to their registered address, such cheque being drawn in the name of the MAC CDI Holder; or

- Global Wire Payment Service, if a MAC CDI Holder has elected to receive payments electronically in their local currency using the CDI Registry's Global Wire Payment Service.

Further details concerning the payment of the Scheme Consideration to Scheme Shareholders (other than CDN) and MAC CDI Holders is set out in section 15 of Part II (*Explanatory Statement*) of the Scheme Circular.

**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:

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| | |
|:---|:---|
| &nbsp;&nbsp;**If you are a MAC Shareholder**<br> Call toll-free in US: <br> +1 (800) 662-5200<br> Outside of US: <br> +1 (203) 658-9400 | &nbsp;&nbsp;**If you are a MAC CDI Holder**<br> Within Australia: <br> 1300 229 418<br> Outside Australia: <br> +61 2 9066 4059 |

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| | | | |
|:---|:---|:---|:---|
| ![](tm2528020d1_ex99-1img003.jpg) | **MAC Copper Limited**<br> maccopperlimited.com | 3rd Floor, 44 Esplanade, <br> St Helier, Jersey, JE4 | Page 2 |

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![](tm2528020d1_ex99-1img002.jpg)

– Ends –

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

Contacts

Mick McMullen<br> Chief Executive Officer & Director<br> MAC Copper Limited<br> investors@metalsacqcorp.com <u>Morné Engelbrecht<br> Chief Financial Officer<br> MAC Copper Limited</u>

**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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| | | | |
|:---|:---|:---|:---|
| ![](tm2528020d1_ex99-1img003.jpg) | **MAC Copper Limited**<br> maccopperlimited.com | 3rd Floor, 44 Esplanade, <br> St Helier, Jersey, JE4 | Page 3 |

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