Company: NMZ
Filing Date: 2025-06-30
Form Type: DEF 14A
Source: 0001193125-25-152769
Chunk: 48

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-06-30
Form: DEF 14A
Chunk 48
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 undersigned, to represent and vote the shares of the undersigned at the Annual Meeting of Shareholders to be held on Thursday, August 14, 2025, or any adjournment(s) or postponement(s) thereof. PLEASE COMPLETE, DATE AND SIGN YOUR PROXY CARD AND RETURN IT IN THE ENCLOSED ENVELOPE SO THAT YOUR VOTE WILL BE COUNTED. NMZ_34604_061625_Pref WE URGE YOU TO SIGN, DATE AND MAIL THIS PROXY PROMPTLY xxxxxxxxxxxxxx code

EVERY SHAREHOLDER’S VOTE IS IMPORTANT! VOTE THIS PROXY CARD TODAY! Important Notice Regarding the Availability of Proxy Materials for the Nuveen Annual Meeting of Shareholders to Be Held on August 14, 2025. The Joint Proxy Statement for this meeting is available at: https://www.nuveen.com/en-us/investments/proxy-information#closed-end-fundsPlease detach at perforation before mailing. In their discretion, the proxy holders are authorized to vote upon such other matters as may properly come before the Annual Meeting or any adjournment(s) or postponement(s) thereof. Properly executed proxies will be voted as specified. If no other specification is made, such shares will be voted “FOR” the proposal. TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS SHOWN IN THIS EXAMPLE: X Proposal 1c. Election of Board Members: Class I Preferred Shares Only: 01. Michael A. Forrester 04. Albin F. Moschner 02. Thomas J. Kenny 05. Margaret L. Wolff 03. Robert L. Young INSTRUCTIONS: To withhold authority to vote for any individual nominee(s), mark the box “FOR ALL EXCEPT” and write the nominee’s number on the line provided. Authorized Signatures — This section must be completed for your vote to be counted.— Sign and Date Below Note: Please sign exactly as your name(s) appear(s) on this proxy card, and date it. When shares are held jointly, each holder should sign. When signing as attorney, executor, administrator, trustee, guardian, officer of corporation or other entity or in another representative capacity, please give the full title under the signature. Date (mm/dd/yyyy) — Please print date below Signature 1 — Please keep signature within the box Signature 2 — Please keep signature within the box Scanner bar code xxxxxxxxxxxxxx NMZ 34604 xxxxxxxx