Company: NMZ
Filing Date: 2025-11-18
Form Type: N-14 8C/A
Source: 0001999371-25-018025
Chunk: 12

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-11-18
Form: N-14 8C/A
Chunk 12
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 | To                                                                                
 vote over the Internet prior to the Meeting, go to the Internet address provided  
 on your proxy card and follow the instructions, using your proxy card as a guide. |

If you intend to attend a Meeting in person and you are a record holder of a Fund’s shares, in order to gain admission, you must show photographic identification, such as your driver’s license. If you intend to attend a Meeting in person and you hold your shares through a bank, broker or other custodian, in order to gain admission you must show photographic identification, such as your driver’s license, and satisfactory proof of ownership of shares of such Fund, such as your voting instruction form (or a copy thereof) or broker’s statement indicating ownership as of a recent date. If you hold your shares in a brokerage account or through a bank or other nominee, you will not be able to vote in person at your Fund’s Meeting unless you have previously requested and obtained a “legal proxy” from your broker, bank or other nominee and present it at such Meeting.

| Mark                         
 L. Winget                    
 Vice President and Secretary 
 The Nuveen Closed-End Funds  |

The information in this Prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This Prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

<div align='center'>SUBJECT TO COMPLETION, DATED NOVEMBER 17, 2025

NUVEEN FUNDS
333 WEST WACKER DRIVE CHICAGO, ILLINOIS 60606
(800) 257-8787

JOINT PROXY STATEMENT/PROSPECTUS

NUVEEN NEW JERSEY QUALITY MUNICIPAL INCOME FUND (NXJ)
NUVEEN PENNSYLVANIA QUALITY MUNICIPAL INCOME FUND (NQP)
NUVEEN MISSOURI QUALITY MUNICIPAL INCOME FUND (NOM)
AND
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND (NMZ)

(EACH, A “FUND” AND TOGETHER, THE “FUNDS”)

[●], 2025</div>

This Joint Proxy Statement/Prospectus is being furnished to common shareholders of Nuveen New Jersey Quality