# EDGAR Filing Document

**Accession Number:** 0001950246
**File Stem:** 9999999995-25-003338
**Filing Date:** 2025-11
**Character Count:** 1435
**Document Hash:** 9e515fface02519c7d3f6e951d540da2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-25-003338.hdr.sgml**: 20251124

**ACCESSION NUMBER**: 9999999995-25-003338

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251121

**DATE AS OF CHANGE**: 20251124

**EFFECTIVENESS DATE**: 20251121

**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:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-273088
- **FILM NUMBER:** 251509457

**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**

## Notice of Effectiveness

**Date:** November 21, 2025

**Accession Number:** 0001104659-25-099523

**Form Type:** POS AM

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**CIK:** 0001950246

**Company Name:** MAC Copper Ltd

**File Number:** 333-273088