[SCHEDULE 13G] AA Mission Acquisition Corp. SEC Filing

Rhea-AI Filing Summary

AA Mission Acquisition Corp. disclosed institutional ownership via Schedule 13G. Westchester Capital Management, LLC reported beneficial ownership of 2,696,389 Class A ordinary shares, representing 7.63% of the class. Virtus Investment Advisers, LLC reported 2,653,972 shares, or 7.51%, and The Merger Fund reported 2,580,868 shares, or 7.30%. Westchester Capital Partners, LLC reported 4,783 shares, or 0.01%.

Voting and dispositive powers are largely shared: Virtus and The Merger Fund each list shared voting and dispositive power over 2,653,972 and 2,580,868 shares, respectively, while Westchester Capital Management holds sole voting and dispositive power over 42,417 shares and shared power over 2,653,972 shares. Percentages are based on 35,349,000 shares outstanding as of August 8, 2025. The filing certifies the holdings were acquired in the ordinary course and not to influence control.

Insights

Equity ownership & disclosure analyst

Routine 13G shows multiple holders around 7–8% with shared powers.

Westchester, Virtus, and The Merger Fund each report significant but non‑controlling stakes in AA Mission Acquisition Corp., with ownership between 7.30% and 7.63% based on 35,349,000 shares outstanding as of August 8, 2025. Schedule 13G indicates passive intent.

Control characteristics remain limited: most voting/dispositive authority is shared, and certifications state ordinary‑course acquisition without the purpose or effect of influencing control. Any trading impact depends on future portfolio decisions by these firms.

The date of event is September 30, 2025. Subsequent filings may update ownership levels if positions change or cross reporting thresholds.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

AA Mission Acquisition Corp.

(Name of Issuer)

Class A ordinary shares, $0.0001 par value per share

(Title of Class of Securities)

G1000R101

(CUSIP Number)

09/30/2025

(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. G1000R101

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 42,417.00
6	Shared Voting Power 2,653,972.00
7	Sole Dispositive Power 42,417.00
8	Shared Dispositive Power 2,653,972.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,696,389.00

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)

7.63 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: * Based on 35,349,000 Shares outstanding as of August 8, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2025.

SCHEDULE 13G

CUSIP No. G1000R101

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 4,783.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,783.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,783.00

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)

0.01 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: * Based on 35,349,000 Shares outstanding as of August 8, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2025.

SCHEDULE 13G

CUSIP No. G1000R101

1

Names of Reporting Persons

Virtus Investment Advisers, 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 0.00
6	Shared Voting Power 2,653,972.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,653,972.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,653,972.00

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)

7.51 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: * Based on 35,349,000 Shares outstanding as of August 8, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2025. The amounts reported on this page are also included in the amounts reported by Westchester Capital Management, LLC on this Schedule 13G.

SCHEDULE 13G

CUSIP No. G1000R101

1

Names of Reporting Persons

The Merger 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

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,580,868.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,580,868.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,580,868.00

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)

7.3 %

12

Type of Reporting Person (See Instructions)

IV

Comment for Type of Reporting Person: * Based on 35,349,000 Shares outstanding as of August 8, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 8, 2025. The amounts reported on this page are also included in the amounts reported by Virtus Investment Advisers, LLC on this Schedule 13G.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AA Mission Acquisition Corp.
(b)	Address of issuer's principal executive offices: 21 Waterway Avenue, STE 300 #9732, The Woodlands, Texas, 77380
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, Westchester Capital Partners, LLC ("WCP"), a Delaware limited liability company, Virtus Investment Advisers, LLC ("Virtus"), a Delaware limited liability company, and The Merger Fund ("MF"), a Massachusetts business trust. Virtus, a registered investment adviser, serves as the investment adviser to MF, The Merger Fund VL ("MF VL"), Virtus Westchester Event-Driven Fund ("EDF") and Virtus Westchester Credit Event Fund ("CEF"). Westchester, a registered investment adviser, serves as sub-advisor to each of MF, MF VL, EDF, 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 and WCP. 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 Virtus Investment Advisers, LLC One Financial Plaza, Hartford, CT 06103 The Merger Fund 101 Munson Street, Greenfield, MA 01301-9683
(c)	Citizenship: Each of Westchester, WCP and Virtus are organized under the laws of the State of Delaware. MF is organized under the laws of the State of Massachusetts.
(d)	Title of class of securities: Class A ordinary shares, $0.0001 par value per share
(e)	CUSIP No.: G1000R101
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: 2,696,389 Westchester Capital Partners, LLC: 4,783 Virtus Investment Advisers, LLC: 2,653,972 The Merger Fund: 2,580,868
(b)	Percent of class: Westchester Capital Management, LLC: 7.63% Westchester Capital Partners, LLC: 0.01% Virtus Investment Advisers, LLC: 7.51% The Merger Fund: 7.30%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Westchester Capital Management, LLC: 42,417 Westchester Capital Partners, LLC: 4,783 Virtus Investment Advisers, LLC: 0 The Merger Fund: 0
	(ii) Shared power to vote or to direct the vote: Westchester Capital Management, LLC: 2,653,972 Westchester Capital Partners, LLC: 0 Virtus Investment Advisers, LLC: 2,653,972 The Merger Fund: 2,580,868
	(iii) Sole power to dispose or to direct the disposition of: Westchester Capital Management, LLC: 42,417 Westchester Capital Partners, LLC: 4,783 Virtus Investment Advisers, LLC: 0 The Merger Fund: 0
	(iv) Shared power to dispose or to direct the disposition of: Westchester Capital Management, LLC: 2,653,972 Westchester Capital Partners, LLC: 0 Virtus Investment Advisers, LLC: 2,653,972 The Merger Fund: 2,580,868
Item 5.	Ownership of 5 Percent or Less of a Class.
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:	11/14/2025

Westchester Capital Partners, LLC

Signature:	/s/ CaSaundra Wu
Name/Title:	CaSaundra Wu/Chief Compliance Officer
Date:	11/14/2025

Virtus Investment Advisers, LLC

Signature:	/s/ Chetram Persaud
Name/Title:	Chetram Persaud/Chief Compliance Officer
Date:	11/14/2025

The Merger Fund

Signature:	/s/ Daphne Chisolm
Name/Title:	Daphne Chisolm/Vice President, Counsel and Assistant Secretary
Date:	11/14/2025

FAQ

What ownership did Westchester Capital Management report in AAM?

Westchester Capital Management reported 2,696,389 shares, representing 7.63% of Class A ordinary shares.

How much of AAM does Virtus Investment Advisers, LLC report?

Virtus Investment Advisers reported 2,653,972 shares, equal to 7.51% of the class.

What stake did The Merger Fund disclose in AAM?

The Merger Fund disclosed 2,580,868 shares, or 7.30% of Class A ordinary shares.

What share count was used to calculate the reported percentages for AAM?

Percentages are based on 35,349,000 shares outstanding as of August 8, 2025.

Did the reporting persons certify passive intent under Schedule 13G?

Yes. They certified the securities were acquired and are held in the ordinary course and not to influence control.

What is the event date triggering this Schedule 13G for AAM?

The date of event is September 30, 2025.

How are voting and dispositive powers allocated among the reporting persons?

Virtus and The Merger Fund report shared voting and dispositive power; Westchester Capital Management reports 42,417 sole and 2,653,972 shared voting and dispositive power.