# EDGAR Filing Document

**Accession Number:** 0001266585
**File Stem:** 0001193125-26-191540
**Filing Date:** 2026-4
**Character Count:** 11793
**Document Hash:** 6b49f0dc6e91a0c8f50f037720d497bf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-191540.hdr.sgml**: 20260429

**ACCESSION NUMBER**: 0001193125-26-191540

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 7

**FILED AS OF DATE**: 20260429

**DATE AS OF CHANGE**: 20260429

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
- **CENTRAL INDEX KEY:** 0001266585

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-84378
- **FILM NUMBER:** 26916036

**BUSINESS ADDRESS:**
- **STREET 1:** 333 W WACKER DRIVE
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312 917 8146

**MAIL ADDRESS:**
- **STREET 1:** 333 WEST WACKER DRIVE
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WELLS FARGO & COMPANY/MN
- **CENTRAL INDEX KEY:** 0000072971
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATIONAL COMMERCIAL BANKS [6021]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 410449260
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 333 MARKET STREET
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105
- **BUSINESS PHONE:** 8008693557

**MAIL ADDRESS:**
- **STREET 1:** 333 MARKET STREET
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WELLS FARGO & CO/MN
- **DATE OF NAME CHANGE:** 19981103

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NORWEST CORP
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NORTHWEST BANCORPORATION
- **DATE OF NAME CHANGE:** 19830516

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_1.pdf`

_No text found in this document._

**Attachment 2:** `ck0000000000-ex99_2.pdf`

_No text found in this document._

**Attachment 3:** `ck0000000000-ex99_5.pdf`

_No text found in this document._

**Attachment 4:** `ck0000000000-ex99_6.pdf`

_No text found in this document._

**Attachment 5:** `ck0000000000-ex99_7.pdf`

_No text found in this document._

**Attachment 6:** `ck0000000000-ex99_8.pdf`

_No text found in this document._

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND**

*(Name of Issuer)*

**PREFERRED SHARES**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Vera Gurova, Senior Counsel**<br>Wells Fargo& Company<br>401 S. Tryon Street, 26th Floor<br>Charlotte NC 28202<br>(704) 339-2335

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**04/27/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Wells Fargo & Company** | Name of reporting person<br>**Wells Fargo & Company** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[x] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[x] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6204.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6204.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6204.00** | Aggregate amount beneficially owned by each reporting person<br>**6204.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**76.84%** | Percent of class represented by amount in Row (11)<br>**76.84%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

**Comment for Reporting Person:** Shares reported include both shares of the CUSIP 670682871listed on the cover page, and of CUSIP 670682855.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Wells Fargo Municipal Capital Strategies, LLC** | Name of reporting person<br>**Wells Fargo Municipal Capital Strategies, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[x] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[x] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6204.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6204.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6204.00** | Aggregate amount beneficially owned by each reporting person<br>**6204.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**76.84%** | Percent of class represented by amount in Row (11)<br>**76.84%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Shares reported include both shares of the CUSIP 670682871 listed on the cover page, and of CUSIP 670682855.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
PREFERRED SHARES

**(b) Name of Issuer:**
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

**(c) Address of Issuer's Principal Executive Offices:**
333 West Wacker Drive, Chicago, IL, 60606

This Amendment No. 1 (this "Amendment") amends, as set forth below, the statement on Schedule 13D, dated April, 3, 2023 and filed with the SEC on April 12, 2023 (the "Original Schedule 13D"). as amended by Amendment No. 1 dated February 28, 2017 and filed with the SEC on March 2, 2017 ("Amendment No. 1") for Wells Fargo & Company ("Wells Fargo") and Wells Fargo Municipal Capital Strategies, LLC ("Capital Strategies") (collectively, the "Reporting Persons") with respect to certain preferred shares ("Preferred Shares") of Nuveen Municipal High Income Opportunity Fund (the "Issuer").

This Amendment is being filed as a result of the reorganization of Nuveen Pennsylvania Quality Municipal Income Fund ("NQP") and Nuveen New Jersey Quality Municipal Income Fund ("NXJ") with and into the Issuer on April 27, 2026 (the "Reorganization"), pursuant to which 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).

Capital Strategies additionally holds 1,700 Series 2031 AMTP Shares of the Issuer (CUSIP: 670682871) which were reported on the Original Schedule 13D.

**Item 4. Purpose of Transaction**

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. Interest in Securities of the Issuer**

**(a)**
—

**(b)**
—

**(c)**
—

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

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.

### 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.

**Reporting Person:** Wells Fargo & Company

**Signature:** /s/ Patricia Arce

**Name/Title:** Patricia Arce, Designated Signer

**Date:** 04/29/2026

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.

**Reporting Person:** Wells Fargo Municipal Capital Strategies, LLC

**Signature:** /s/ Daniel Frizsell

**Name/Title:** Daniel Frizsell, Vice President

**Date:** 04/29/2026