[SCHEDULE 13G/A] MAC Copper Limited SEC Filing

Rhea-AI Filing Summary

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.

Insights

Securities Analyst

TL;DR: Neutral filing—United Super reveals a 1.6 % passive stake in MTAL, signalling no control ambitions.

The amendment shows United Super holds 1.34 million CDIs, well below the 5 % threshold, with sole voting and dispositive power. The passive 13G language and certification indicate the position is purely investment-oriented rather than activist. A 1.6 % stake affords limited influence and is unlikely to move valuation or strategy. Unless prior ownership exceeded 5 %, this update has minimal market impact and does not alter MTAL’s shareholder structure materially. I therefore classify the disclosure as informational and not impactful to the investment thesis.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

MAC Copper Ltd

(Name of Issuer)

CHESS Depositary Interest (CDI)

(Title of Class of Securities)

G60409110

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. G60409110

1

Names of Reporting Persons

United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

AUSTRALIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,340,250.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,340,250.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,340,250.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

1.6 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MAC Copper Ltd
(b)	Address of issuer's principal executive offices: 3RD FLOOR, 44 ESPLANADE, ST, ST. HELIER, JERSEY, JE4 9WG
Item 4.	Ownership
(a)	Amount beneficially owned: 1340250
(b)	Percent of class: 1.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1340250
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1340250
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund

Signature:	Shirlee Chan
Name/Title:	Head of Investment Risk and Compliance
Date:	08/05/2025

FAQ

Who filed the latest Schedule 13G/A for MTAL?

The filing was made by United Super Pty Ltd as trustee for the Construction & Building Unions Superannuation Fund.

How many MAC Copper shares does United Super own?

United Super reports owning 1,340,250 CHESS Depositary Interests in MAC Copper Ltd.

What percentage of MTAL’s outstanding shares does this represent?

The stake equals 1.6 % of the outstanding class.

Does United Super have shared voting or dispositive power over the shares?

No. The filer reports sole voting and dispositive power and 0 shared power.

Is United Super seeking control of MAC Copper Ltd?

The certification states the securities were not acquired for the purpose of influencing or controlling the issuer.