MAC Copper Limited incorporates October 6, 2025 press release into Form F-3

Rhea-AI Filing Summary

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.

Form 6-K: How Foreign Companies Report to the SEC →

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

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
St. Helier, Jersey, JE4 9WG
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 x 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registration statement) and to be a part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.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

Exhibit	Description of Exhibit
99.1	Press Release of MAC Copper Limited dated October 6, 2025

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.

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

FAQ

What does MAC Copper Limited’s October 2025 Form 6-K cover?

MAC Copper Limited’s October 2025 Form 6-K is a report of a foreign private issuer furnished under Exchange Act Rules 13a-16 or 15d-16. It covers the period for the month of October 2025 and includes a referenced press release as an exhibit.

How is this MAC Copper Limited Form 6-K used in the company’s Form F-3?

The Form 6-K states that the report, including all exhibits, is incorporated by reference into MAC Copper Limited’s Form F-3 registration statement, Registration No. 333-276216. This means its contents become part of that shelf registration, unless superseded by later filings.

What exhibit is attached to MAC Copper Limited’s October 2025 Form 6-K?

The exhibit index shows a single exhibit, numbered 99.1, described as a press release of MAC Copper Limited dated October 6, 2025. That press release is part of the materials incorporated by reference into the existing Form F-3 registration statement.

Who signed MAC Copper Limited’s October 6, 2025 Form 6-K?

The Form 6-K is signed on behalf of MAC Copper Limited by Michael James McMullen, identified as the Chief Executive Officer. The signature block shows the registrant’s name, his signature, his printed name, his title, and the date October 6, 2025.

What address does MAC Copper Limited list in this Form 6-K?

MAC Copper Limited lists its principal executive offices as 3rd Floor, 44 Esplanade, St. Helier, Jersey, JE4 9WG. The filing also provides a telephone contact of +(817) 698-9901 alongside this address for the company’s principal executive offices.