SEC FORM 3

SEC FORM 3 SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

MAC Partners LLC

(Last)

(First)

(Middle)

C/O MAPLES CORPORATE SERVICES LIMITED

PO BOX 309, UGLAND HOUSE

(Street)

GEORGE TOWN

KY1-1104

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/11/2026

3. Issuer Name and Ticker or Trading Symbol
Metals Acquisition Corp. II [ MTAL.U ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Class B Ordinary Shares	⁽¹⁾	⁽¹⁾	Class A Ordinary Shares	7,666,667	⁽¹⁾	D⁽²⁾

Explanation of Responses:

1. The Class B ordinary shares are convertible for the Issuer's Class A ordinary shares as described under the heading "Description of Securities" in the Issuer's Registration Statement on Form S-1 (File No. 333-293143) (the "Registration Statement") and have no expiration date. The Class B ordinary shares beneficially owned by the Reporting Person include up to 1,000,000 Class B ordinary shares subject to forfeiture to the Issuer depending on the extent to which the underwriters' over-allotment option is exercised in connection with the Issuer's initial public offering of units, as described in the Registration Statement.

2. This Form 3 is being filed by MAC Partners LLC (the "Sponsor"). The Sponsor is governed by a board of managers consisting of three managers, Michael James McMullen, Morne Engelbrecht and Christopher Patrick Rosario. Any action by the Sponsor with respect to the Issuer's securities held by it, including voting and dispositive decisions, requires at least a majority vote of the managers of the board of managers. Under the so-called "rule of three," because voting and dispositive decisions are made by a majority of the managers, none of the managers is deemed to be a beneficial owner of Issuer's securities held by the Sponsor, even those in which such manager holds a pecuniary interest. Accordingly, none of the managers on the Sponsor's board of managers is deemed to have or share beneficial ownership of the Class B Ordinary Shares held by the Sponsor.

Remarks:

See Exhibit 24.1 - Powers of Attorney.

	/s/ Jordan Leon, Attorney-in-Fact	03/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

SEC Form 3 filed by new insider Mac Partners Llc