NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND Insider Trading Activity

Bank of America Corporation reported an internal transfer involving preferred shares of Nuveen Municipal High Income Opportunity Fund (NMZ).

Accepted by SEC EDGAR 12/15/2025 - 04:14 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Bank of America Corporation reported an internal transfer involving preferred shares of Nuveen Municipal High Income Opportunity Fund (NMZ). Banc of America Preferred Funding Corporation deposited 1,000 of the fund's 2032 Adjustable Rate MuniFund Term Preferred Shares into a tender option bond trust designated as TOB Series 2025-BAP0001 Trust, which now holds legal title to those shares.

Following this transaction, Bank of America has an indirect interest in 1,870 of these preferred shares through its subsidiary and the trust. The reporting persons state that their joint report should not be viewed as an admission that they are acting as a group or are members of any group for purposes of Section 13(d) of the Securities Exchange Act.

Insider Trade Summary

Other: 2,000 shares

Other 2 txns

Insider BANK OF AMERICA CORP /DE/, Banc of America Preferred Funding Corp

Role 10% Owner | 10% Owner

Type	Security	Shares	Price	Value
Other	Adjustable Rate MuniFund Term Preferred Shares	1,000	$0.00	$0.00
Other	Adjustable Rate MuniFund Term Preferred Shares	1,000	$0.00	$0.00

Holdings After Transaction: Adjustable Rate MuniFund Term Preferred Shares — 870 shares (Indirect, By Subsidiary); Adjustable Rate MuniFund Term Preferred Shares — 1,000 shares (Indirect, By Trust)

Footnotes (3)

1. F1. The 1,000 shares 2032 Adjustable Rate MuniFund Term Preferred Shares (2032 AMTP Shares) reported as disposed of in Table I represent AMTP Shares of Nuveen Municipal High Income Opportunity Fund beneficially owned by Banc of America Preferred Funding Corporation (BAPFC) that, on December 11, 2025, BAPFC deposited into a tender option bond trust designated as TOB Series 2025-BAP0001 Trust (the TOB Trust). The TOB Trust has title to the AMTP Shares but does not independently have the power to dispose or direct the disposition of the AMTP Shares. BAPFC, as a beneficiary of the Trust and through its contractual rights, retains an indirect beneficial ownership in the AMTP Shares, including with respect to the voting rights on the AMTP Shares.
2. F2. This statement is jointly filed by Bank of America Corporation and BAPFC. Bank of America Corporation holds an indirect interest in the 1,870 AMTP shares listed in Table I (the "Securities") by virtue of its indirect ownership of its subsidiary BAPFC.
3. F3. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.

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SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BANK OF AMERICA CORP /DE/

(Last) (First) (Middle)

BANK OF AMERICA CORPORATE CENTER

100 N TRYON ST

(Street)

CHARLOTTE NC 28255

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND [ NMZ ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Adjustable Rate MuniFund Term Preferred Shares	12/11/2025		J(1)		1,000(1)	D	(1)	870(1)	I	By Subsidiary(2)(3)
Adjustable Rate MuniFund Term Preferred Shares	12/11/2025		J(1)		1,000(1)	A	(1)	1,000(1)	I	By Trust(1)(2)(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

BANK OF AMERICA CORP /DE/

(Last) (First) (Middle)

BANK OF AMERICA CORPORATE CENTER

100 N TRYON ST

(Street)

CHARLOTTE NC 28255

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Banc of America Preferred Funding Corp

(Last) (First) (Middle)

214 NORTH TRYON STREET

(Street)

CHARLOTTE NC 28255

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. The 1,000 shares 2032 Adjustable Rate MuniFund Term Preferred Shares (2032 AMTP Shares) reported as disposed of in Table I represent AMTP Shares of Nuveen Municipal High Income Opportunity Fund beneficially owned by Banc of America Preferred Funding Corporation (BAPFC) that, on December 11, 2025, BAPFC deposited into a tender option bond trust designated as TOB Series 2025-BAP0001 Trust (the TOB Trust). The TOB Trust has title to the AMTP Shares but does not independently have the power to dispose or direct the disposition of the AMTP Shares. BAPFC, as a beneficiary of the Trust and through its contractual rights, retains an indirect beneficial ownership in the AMTP Shares, including with respect to the voting rights on the AMTP Shares.

2. This statement is jointly filed by Bank of America Corporation and BAPFC. Bank of America Corporation holds an indirect interest in the 1,870 AMTP shares listed in Table I (the "Securities") by virtue of its indirect ownership of its subsidiary BAPFC.

3. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.

	BANK OF AMERICA CORP /DE/ By Its: Authorized Signatory /s/ Andres Ortiz	12/15/2025
	BANC OF AMERICA PREFERRED FUNDING CORPORATION By Its: Authorized Signatory /s/ Andres Ortiz	12/15/2025
	** Signature of Reporting Person	Date
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