# EDGAR Filing Document

**Accession Number:** 0001950246
**File Stem:** 0001104659-25-098516
**Filing Date:** 2025-10
**Character Count:** 8665
**Document Hash:** d091915ab49ac46f2892c9cdc7344957
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-098516.hdr.sgml**: 20251010

**ACCESSION NUMBER**: 0001104659-25-098516

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 15

**CONFORMED PERIOD OF REPORT**: 20251010

**FILED AS OF DATE**: 20251010

**DATE AS OF CHANGE**: 20251010

**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:** 251386256

**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 of the Securities Exchange Act of 1934**

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

---

---

| |
|:---|
| **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) |

---

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](tm2528236d2_ex99-1.htm) | [Press Release of MAC Copper Limited dated October 10, 2025.](tm2528236d2_ex99-1.htm) |

---

**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) |
| <br> Date: | <br> October 10, 2025 | <br> By: | <br> /s/ Michael James McMullen | <br> /s/ Michael James McMullen |
|  |  |  | Name: | Michael James McMullen |
|  |  |  | Title: | Chief Executive Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

![](image_001.jpg)

10 October 2025

**MAC Copper Limited Announces Scheme with Harmony becomes effective**

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 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.

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| | |
|:---|:---|
| &nbsp;&nbsp;**Event** | &nbsp;&nbsp;**Date and time (Jersey time)** |
| &nbsp;&nbsp;Effective Date | &nbsp;&nbsp;10 October 2025 |
| &nbsp;&nbsp;Last day of dealings in MAC CDIs on the ASX<sup>1</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>2</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>3</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<br>|
| &nbsp;&nbsp;Complete delisting of MAC Shares from the NYSE | &nbsp;&nbsp;24 October 2025 |
| &nbsp;&nbsp;Implementation Date | &nbsp;&nbsp;24 October 2025 |

---

![](image_002.jpg)

![](image_003.jpg)

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| | |
|:---|:---|
| &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 |

---

*<sup>1</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>2</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>3</sup> 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:

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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 |

---

– Ends –

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

**Contacts**

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