Westchester files 5.05% stake in Miluna Acquisition Corp

Rhea-AI Filing Summary

Miluna Acquisition Corp reports passive holdings by Westchester entities under a joint Schedule 13G. Westchester Capital Management, LLC beneficially owns 446,002 shares representing 5.05% of the class and Westchester Capital Partners, LLC holds 3,998 shares representing 0.05%. The filing cites February 12, 2026 for 8,828,100 shares outstanding as reported in the company's Form 10-K. The Reporting Persons state they may be deemed a group for Section 13(g)(3) purposes but do not admit group status.

Insights

Institutional Ownership Analyst

Large passive stake disclosed: 5.05% by Westchester Capital Management.

The filing shows Westchester Capital Management, LLC holds 446,002 shares with shared dispositive power of 407,879 shares, indicating voting or disposition coordination across funds. The report ties ownership to funds that hold shares for investors.

Future activity depends on fund decisions; subsequent filings would reveal any directional trades.

Compliance & SEC Filings Specialist

Schedule 13G used for passive/beneficial disclosure; group language is precautionary.

The statement is filed jointly by Westchester Capital Management and Westchester Capital Partners and notes possible group treatment under Section 13(g)(3) while disclaiming an admission of group status. The filing cites May 15, 2026 signatures by the Chief Compliance Officer.

Material follow-ups would be additional Schedule 13D/13G amendments if ownership or intent changes.

Key Figures

Westchester Capital Management holdings: 446,002 shares Westchester Capital Partners holdings: 3,998 shares Shares outstanding: 8,828,100 shares

3 metrics

Westchester Capital Management holdings 446,002 shares beneficially owned as reported in Schedule 13G

Westchester Capital Partners holdings 3,998 shares beneficially owned as reported in Schedule 13G

Shares outstanding 8,828,100 shares as of <date>February 12, 2026</date> per issuer 10-K

Key Terms

Beneficially owned, Schedule 13G, Shared dispositive power

3 terms

Beneficially owned regulatory

"Amount beneficially owned: Westchester Capital Management, LLC: 446,002"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Schedule 13G regulatory

"This statement is being filed jointly by the following"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Shared dispositive power regulatory

"Shared Dispositive Power 407,879.00"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Westchester Capital Management hold in Miluna Acquisition Corp (MMTX)?

Westchester Capital Management beneficially owns 446,002 shares, or 5.05% of the class. This position is reported with voting and dispositive powers split between sole and shared control as detailed in the Schedule 13G.

How many shares outstanding does Miluna report and what is the reference date?

The filing references 8,828,100 shares outstanding as of February 12, 2026, per the issuer's Annual Report on Form 10-K. That outstanding count is the basis for the percent-of-class calculations in the Schedule 13G.

Does the Schedule 13G indicate active group coordination between the Reporting Persons?

The Reporting Persons state they "may be deemed to constitute a 'group'" under Section 13(g)(3) but expressly note the filing "shall not be construed as an admission" of group status. No definitive group agreement is admitted in the text.

Who signed the Schedule 13G on behalf of Westchester and when?

The Schedule 13G was signed by CaSaundra Wu, Chief Compliance Officer for the reporting entities with signature dates shown as 05/15/2026 for each filing signature line in the excerpt.

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

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Accepted by SEC EDGAR 05/15/2026 - 06:38 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Miluna Acquisition Corp

(Name of Issuer)

Ordinary shares, $0.0001 par value per share

(Title of Class of Securities)

G6180J100

(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): G6180J100

1

Names of Reporting Persons

Westchester Capital Management, LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 38,123.00
6	Shared Voting Power 407,879.00
7	Sole Dispositive Power 38,123.00
8	Shared Dispositive Power 407,879.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

446,002.00

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)

5.05 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: * Based on 8,828,100 Shares outstanding as of February 12, 2026, as reported in the Issuer's Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 12, 2026.

SCHEDULE 13G

CUSIP Number(s): G6180J100

1

Names of Reporting Persons

Westchester Capital Partners, LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,998.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,998.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,998.00

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)

0.05 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: * Based on 8,828,100 Shares outstanding as of February 12, 2026, as reported in the Issuer's Annual Report on Form 10-K filed with the Securities and Exchange Commission on February 12, 2026.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Miluna Acquisition Corp
(b)	Address of issuer's principal executive offices: 12F, No. 43, Cheng Gong Road, Sec 4, Neihu, Taipei, 114 Taiwan
Item 2.
(a)	Name of person filing: This statement is being filed jointly by the following (each, a "Reporting Person," and collectively, the "Reporting Persons"): Westchester Capital Management, LLC ("Westchester"), a Delaware limited liability company, and Westchester Capital Partners, LLC ("WCP"), a Delaware limited liability company. Westchester, a registered investment adviser, serves as sub-advisor to each of The Merger Fund ("MF"), The Merger Fund VL ("MF VL"), Virtus Westchester Event-Driven Fund ("EDF"), Virtus Westchester Credit Event Fund ("CEF"), JNL/Westchester Capital Event Driven Fund ("JNL"), JNL Multi-Manager Alternative Fund ("JARB") and Principal Funds, Inc. - Global Multi-Strategy Fund ("PRIN"). WCP, a registered investment adviser, serves as investment adviser to Westchester Capital Master Trust ("Master Trust", together with MF, MF VL, EDF, CEF, JNL, JARB and PRIN, the "Funds"). The Funds directly hold Ordinary Shares of the Company for the benefit of the investors in those Funds. Mr. Roy Behren and Mr. Michael T. Shannon each serve as Co-Presidents of Westchester. Westchester and WCP often make acquisitions in, and dispose of, securities of an issuer on the same terms and conditions and at the same time. Based on the foregoing and the relationships described herein, these parties may be deemed to constitute a "group" for purposes of Section 13(g)(3) of the Act. The filing of this statement shall not be construed as an admission that the Reporting Persons are a group, or have agreed to act as a group.
(b)	Address or principal business office or, if none, residence: Westchester Capital Management, LLC 100 Summit Lake Drive, Valhalla, NY 10595 Westchester Capital Partners, LLC 100 Summit Lake Drive, Valhalla, NY 10595
(c)	Citizenship: Each of Westchester and WCP are organized under the laws of the State of Delaware.
(d)	Title of class of securities: Ordinary shares, $0.0001 par value per share
(e)	CUSIP Number(s): G6180J100
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).
Item 4.	Ownership
(a)	Amount beneficially owned: Westchester Capital Management, LLC: 446,002 Westchester Capital Partners, LLC: 3,998
(b)	Percent of class: Westchester Capital Management, LLC: 5.05% Westchester Capital Partners, LLC: 0.05%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Westchester Capital Management, LLC: 38,123 Westchester Capital Partners, LLC: 3,998
	(ii) Shared power to vote or to direct the vote: Westchester Capital Management, LLC: 407,879 Westchester Capital Partners, LLC: 0
	(iii) Sole power to dispose or to direct the disposition of: Westchester Capital Management, LLC: 38,123 Westchester Capital Partners, LLC: 3,998
	(iv) Shared power to dispose or to direct the disposition of: Westchester Capital Management, LLC: 407,879 Westchester Capital Partners, LLC: 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.

Westchester Capital Management, LLC

Signature:	/s/ CaSaundra Wu
Name/Title:	CaSaundra Wu, Chief Compliance Officer
Date:	05/15/2026

Westchester Capital Partners, LLC

Signature:	/s/ CaSaundra Wu
Name/Title:	CaSaundra Wu, Chief Compliance Officer
Date:	05/15/2026