Company: NMZ
Filing Date: 2025-11-18
Form Type: N-14 8C/A
Source: 0001999371-25-018025
Chunk: 238

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-11-18
Form: N-14 8C/A
Chunk 238
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                         | SCAN                                    
 The QR code or visit                    
 www.proxy-direct.com                    
 to vote your shares                     |
|                           |                         | LIVE AGENT                              
 Call 1-866-585-5258 with any questions. 
 Specialists can assist with voting.     
 Available Monday-Friday                 
 from 9 a.m. – 11 p.m. and               
 Saturday 12 p.m. – 6 p.m. ET            |
|                           |                         | CALL                                    
 1-800-337-3503                          
 Follow the recorded instructions        
 available 24 hours                      |
|                           |                         | MAIL                                    
 Vote, sign and Mail in the              
 enclosed Business Reply Envelope        |
|                           |                         | VOTE IN PERSON                          
 Attend Shareholder Meeting              
 333 West Wacker Dr.                     
 Chicago, IL, 60606 on January 16, 2026  |

COMMON SHARES

THIS PROXY IS BEING SOLICITED BY THE BOARD OF TRUSTEES.
The undersigned shareholder(s) of Nuveen Municipal High Income Opportunity Fund (the “Acquiring Fund”), revoking previous
proxies, hereby appoints John M. McCann, Kevin J. McCarthy and Mark L. Winget, or any one of them as true and lawful attorneys with power
of substitution of each, to vote all shares of Nuveen Municipal High Income Opportunity Fund that the undersigned is entitled to vote
at the Special Meeting of Shareholders to be held on January 16, 2026, at [●] p.m., Central time, at the offices of Nuveen, LLC,
333 West Wacker Drive, Chicago, Illinois 60606, and at any adjournment or postponement thereof as indicated on the reverse side. In their
discretion, the proxy holders named above are authorized to vote upon such other matters as may properly come before the meeting or any
adjournment or postponement thereof.

Receipt of the Notice of the Special Meeting of Shareholders and the accompanying Joint Proxy Statement/Prospectus is hereby acknowledged. The votes entitled to be cast by the undersigned will be cast as indicated or FOR the proposal if no choice is indicated.

| VOTE VIA THE INTERNET: www.proxy-direct.com |
| VOTE VIA THE TELEPHONE: 1-800-337-3503      |

<div align='center'>NMZ_34776_101525

PLEASE SIGN, DATE ON THE REVERSE SIDE AND RETURN THE PROXY PROMPTLY USING THE ENCLOSED ENVELO