13D Filings
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
NMZ
Amendment
Ownership

76.84%

Total Shares

6,204

Issuer CIK

1266585

Event Date

Apr 26, 2026

Accepted

Apr 29, 2026, 04:08 PM

Reporting Persons (2)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
Wells Fargo & Company
Holding Company
76.84%6,20406,204
Wells Fargo Municipal Capital Strategies, LLC
Other
76.84%6,20406,204
Disclosure Items (7)

Security Title

PREFERRED SHARES

Issuer Name

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

Issuer Address

333 West Wacker Drive, Chicago, IL, 60606

Principal Occupation

Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule I and Schedule II referenced therein and replacing them with Schedule I and Schedule II included with this Amendment and attached as an Exhibit hereto.

Convictions

Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule I and Schedule II referenced therein and replacing them with Schedule I and Schedule II included with this Amendment and attached as an Exhibit hereto.

Citizenship

Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule I and Schedule II referenced therein and replacing them with Schedule I and Schedule II included with this Amendment and attached as an Exhibit hereto.

Item 3 of the Original Schedule 13D is hereby amended by adding the following paragraph at the end thereof: "In connection with the Reorganization of NXJ and NQP into the Issuer, Capital Strategies exchanged its 1,443 Series 2 VRDP Shares of NXJ (CUSIP: 67069Y607), its 886 Series 3 VRDP Shares of NXJ (CUSIP: 67069Y706), its 1,125 Series 2 VRDP Shares of NQP (CUSIP: 670972603), and its 1,050 Series 3 VRDP Shares of NQP (CUSIP: 670972702) for 4,504 Series 1 VRDP Shares of the Issuer (CUSIP: 670682855)."

Item 4 of the Original Schedule 13D is hereby amended by adding the following paragraph at the end thereof: "In connection with the Reorganization of NXJ and NQP into the Issuer, Capital Strategies exchanged its 1,443 Series 2 VRDP Shares of NXJ (CUSIP: 67069Y607), its 886 Series 3 VRDP Shares of NXJ (CUSIP: 67069Y706), its 1,125 Series 2 VRDP Shares of NQP (CUSIP: 670972603), and its 1,050 Series 3 VRDP Shares of NQP (CUSIP: 670972702) for 4,504 Series 1 VRDP Shares of the Issuer (CUSIP: 670682855) pursuant to that certain Initial Series 1 Variable Rate Demand Preferred Shares (VRDP) Adjustable Rate Special Rate Period Purchase Agreement dated April 27, 2026."

Item 5(d) of the Original Schedule 13D is hereby amended to read: "No other person is known by the Reporting Persons to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, AMTP Shares or VRDP Shares that may be deemed to be beneficially owned by the Reporting Persons."

Item 6 of the Original Schedule 13D is hereby amended by adding the following at the end of the first paragraph thereof: "Following the Reroganization the voting and consent rights on the Reporting Persons' Series 2031 AMTP Shares of the Issuer (CUSIP 670682871) will remain subject to the Voting Trust as reported on the Original 13D. With respect to the Series 1 VRDP Shares acquired by Capital Strategies in connection with the Reorganzation, on April 27, 2027, Capital Strategies assigned certain preferred class voting rights on such VRDP Shares to a voting trust (the "Series 1 Voting Trust") created pursuant to that certain Voting Trust Agreement, dated April 27, 2026 among Capital Strategies, Glass Lewis & Co., LLC, as voting trustee (the "Series 1 Voting Trustee") and Glass Lewis & Co., LLC, as voting consultant (the "Series 1 Voting Consultant"). Voting and consent rights on the VRDP Shares not assigned to the Series 1 Voting Trust have been retained by Capital Strategies. The Seriese Voting Trust provides that with respect to voting or consent matters relating to the voting rights assigned to the Series 1 Voting Trust, the Series 1 Voting Consultant analyzes such voting or consent matters and makes a recommendation to the Series 1 Voting Trustee on voting or consenting. The Series 1 Voting Trustee is obligated to follow any such recommendations of the Series 1 Voting Consultant when providing a vote or consent.

Item 7 of the Original Schedule 13D is hereby amended by deleting Exhibit 99.1 and Exhibit 99.2 thereto and inserting the following exhibits in their place: "Exhibit Description of Exhibit 99.1 Joint Filing Agreement 99.2 Limited Power of Attorney" Item 7 of the Original Schedule 13D is hereby further amended by adding the following Exhibit to the listings of exhibits to be attached to this Schedule 13D: "Exhibit Description of Exhibit 99.5 Amended and Restated Schedule I and Schedule II 99.6 Initial Series 1 Variable Rate Demand Preferred Shares (VRDP) Adjustable Rate Special Rate Period Purchase Agreement, dated April 27, 2026 99.7 Voting Trust Agreement, dated April 27, 2026 99.8 Amendment to Voting Trust Agreement, dated April 24, 2026."

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND — Schedule 13D | 13D Filings