Polar Asset Management reports 1.75M MOZAYYX shares (MZYX) (5.8%)

Rhea-AI Filing Summary

Polar Asset Management Partners Inc. filed a Schedule 13G reporting beneficial ownership of 1,750,000 Class A ordinary shares of MOZAYYX Acquisition Corp, representing 5.8% of that class. The filing states the shares are held through Polar Multi-Strategy Master Fund and that the Reporting Person may be deemed to beneficially own the reported shares by virtue of its ownership of units convertible into or including Class A ordinary shares. The report lists the Reporting Person's sole voting and dispositive power over the 1,750,000 shares. The filing is signed by the Chief Compliance Officer on 05/15/2026.

Insights

Institutional Ownership Analyst

Institutional stake disclosed: 1.75M shares (5.8%) via Polar-managed fund.

Polar Asset Management reports beneficial ownership of 1,750,000 Class A ordinary shares of MOZAYYX Acquisition Corp, equal to 5.8% of the class, held through Polar Multi-Strategy Master Fund.

The filing notes the stake arises from units convertible into or including Class A ordinary shares and records sole voting and dispositive power. Subsequent filings would show any change in percentage or disposition; timing and cash-flow treatment are not described in the provided excerpt.

Key Figures

Beneficial ownership: 1,750,000 shares Percent of class: 5.8% CUSIP: G63113107 +1 more

4 metrics

Beneficial ownership 1,750,000 shares Class A ordinary shares; reported ownership amount

Percent of class 5.8% Percent of Class A ordinary shares beneficially owned

CUSIP G63113107 Identifier for the Class A ordinary shares

Filing signature date 05/15/2026 Date the Schedule 13G was signed

Key Terms

beneficially own, sole dispositive power, CUSIP

3 terms

beneficially own regulatory

"may be deemed to beneficially own the reported shares"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 1750000"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

CUSIP regulatory

"CUSIP Number(s): G63113107"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/15/2026 - 11:57 AM Learn about SEC filing dates

FAQ

What stake did Polar Asset Management report in MOZAYYX (MZYX)?

Polar reported beneficial ownership of 1,750,000 Class A ordinary shares, representing 5.8% of the class. The shares are held through Polar Multi-Strategy Master Fund and the filing is dated 05/15/2026.

Does Polar have voting and disposal power over the reported MZYX shares?

Yes. The filing states Polar has sole voting power and sole dispositive power over the 1,750,000 shares reported. Shared powers are listed as 0 in the filing's ownership table.

Through which vehicle does Polar hold the MOZAYYX shares?

The filing states the shares are held through Polar Multi-Strategy Master Fund, a Cayman Islands exempted company, for which Polar Asset Management Partners Inc. serves as investment advisor.

What CUSIP and class are associated with the reported securities?

The filing identifies the securities as Class A ordinary shares, par value $0.0001 with CUSIP G63113107. That class and CUSIP are the labels used in the Schedule 13G excerpt.

Who signed the Schedule 13G and when was it signed?

The Schedule 13G is signed by Andrew Ma, Chief Compliance Officer, on 05/15/2026. The signature block appears at the end of the provided excerpt.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

MOZAYYX Acquisition Corp

(Name of Issuer)

Class A ordinary shares, par value $0.0001 per share

(Title of Class of Securities)

G63113107

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G63113107

1

Names of Reporting Persons

Polar Asset Management Partners Inc.

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

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,750,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,750,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,750,000.00

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)

5.8 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MOZAYYX Acquisition Corp
(b)	Address of issuer's principal executive offices: 111 CONGRESS AVE, SUITE 1200, AUSTIN, TX, 78701
Item 2.
(a)	Name of person filing: This statement is filed by Polar Asset Management Partners Inc., a company incorporated under the laws of Ontario, Canada, which serves as the investment advisor to Polar Multi-Strategy Master Fund, a Cayman Islands exempted company ("PMSMF") with respect to the shares directly held by PMSMF.
(b)	Address or principal business office or, if none, residence: 16 York Street, Suite 2900, Toronto, Ontario, M5J 0E6
(c)	Citizenship: Canada
(d)	Title of class of securities: Class A ordinary shares, par value $0.0001 per share
(e)	CUSIP Number(s): G63113107
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
	The Reporting Person is an investment fund manager, portfolio manager, exempt market dealer and commodity trading manager registered with the Ontario Securities Commission.
Item 4.	Ownership
(a)	Amount beneficially owned: 1750000 (The Reporting Person may be deemed to beneficially own the reported shares by virtue of its ownership of units that are convertible into or include Class A ordinary shares.)
(b)	Percent of class: 5.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1750000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1750000
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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.

Polar Asset Management Partners Inc.

Signature:	Andrew Ma
Name/Title:	Chief Compliance Officer
Date:	05/15/2026