Welcome to our dedicated page for MAC Copper SEC filings (Ticker: MTAL), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
This page aggregates historical U.S. Securities and Exchange Commission filings for MAC Copper Limited, which previously traded on the New York Stock Exchange under the ticker MTAL. MAC Copper Limited was a foreign private issuer and filed reports such as Form 20-F and Form 6-K in connection with its metals and mining activities and corporate developments.
Among the key documents available are multiple Form 6-K current reports that furnish press releases on topics including the proposed acquisition of 100% of MAC’s issued share capital by Harmony Gold (Australia) Pty Ltd via a Jersey law scheme of arrangement, court directions and sanction of the scheme, dispatch of the scheme circular, shareholder voting results, and regulatory approvals from the South African Reserve Bank and Australia’s Foreign Investment Review Board. These filings also incorporate operational updates, such as the June 2025 quarterly activities report describing safety performance, copper production, cost metrics, and project development at the CSA Copper Mine.
A pivotal document in the MTAL filing history is Form 15, in which MAC Copper Limited certified the termination of registration of its ordinary shares under Section 12(g) of the Securities Exchange Act of 1934 and the suspension of its duty to file reports under Sections 13 and 15(d). The Form 15 explains that, effective as of October 10, 2025 and implemented on October 24, 2025, Harmony Gold (Australia) Pty Ltd acquired 100% of the issued share capital in MAC Copper Limited by way of the Jersey law scheme of arrangement, and notes that the approximate number of holders of record as of the certification date was one.
Through this filings archive, users can follow how MAC Copper Limited reported on the Harmony transaction, its financing and streaming arrangements, and its risk exposures, as well as how it completed its transition from a listed foreign private issuer to a wholly owned subsidiary. Stock Titan’s tools can help summarize lengthy filings, highlight key terms in forms such as 6-K and 15-12G, and make it easier to understand the implications of these regulatory documents for the historical MTAL listing.
MAC Copper Limited furnished a Form 6-K as a report of a foreign private issuer for October 2025. The filing states that this report, including all exhibits, is incorporated by reference into the company’s Form F-3 registration statement (Registration No. 333-276216).
The exhibit list identifies a press release dated October 6, 2025 as Exhibit 99.1. The report is signed on behalf of MAC Copper Limited by Chief Executive Officer Michael James McMullen on October 6, 2025.
MAC Copper Ltd: This Schedule 13G/A reports that Sprott Inc. holds 3,188,335 ordinary shares of MAC Copper Ltd, representing 3.7% of the outstanding class. Sprott reports no sole voting or dispositive power and indicates its power is shared for both voting and disposition of the reported shares. Two related filers, Resource Capital Investment Corp. and Sprott Private Resource Lending Fund II, report zero ownership of the class. The filing states the positions are not held to change or influence control of the issuer and includes exhibits identifying joint filing arrangements and control person details.
United Super Pty Ltd, acting as trustee for the Construction & Building Unions Superannuation Fund, filed Amendment No. 3 to Schedule 13G for MAC Copper Ltd (symbol: MTAL). As of 30 June 2025, the fund beneficially owned 1,340,250 CHESS Depositary Interests, representing 1.6 % of the outstanding class. The filer reports sole voting and dispositive power over the entire position and no shared power. Because the stake is under the 5 % threshold, the report is made on a passive 13G basis, and the certification states the investment is not intended to influence control of the issuer. The statement is signed by Shirlee Chan (Head of Investment Risk & Compliance) on 5 Aug 2025. No additional financial results, transactions or governance changes are provided; the document strictly updates ownership for regulatory compliance.