Company: NMZ
Filing Date: 2025-07-07
Form Type: N-CSRS
Source: 0001193125-25-156000
Chunk: 73

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-07-07
Form: N-CSRS
Chunk 73
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 specialist knowledge across all major asset classes and particular strength in solutions that provide income for investors and that draw on our expertise in alternatives and responsible investing. Nuveen is driven not only by the independent investment processes across the firm, but also the insights, risk management, analytics and other tools and resources that a truly world-class platform provides. As a global asset manager, our mission is to work in partnership with our clients to create solutions which help them secure their financial future. Find out how we can help you. To learn more about how the products and services of Nuveen may be able to help you meet your financial goals, talk to your financial advisor, or call us at (800) 257-8787.Please read the information provided carefully before you invest. Investors should consider the investment objective and policies, risk considerations, charges and expenses of any investment carefully. Where applicable, be sure to obtain a prospectus, which contains this and other relevant information. To obtain a prospectus, please contact your securities representative or Nuveen, 333 W. Wacker Dr., Chicago, IL 60606. Please read the prospectus carefully before you invest or send money. Learn more about Nuveen Funds at: www.nuveen.com/closed-end-funds NOT FDIC INSURED MAY LOSE VALUE NO BANK GUARANTEE

| Nuveen Securities, LLC, member FINRA and SIPC | 333 West Wacker Drive | Chicago, IL 60606 | www.nuveen.com |     | ESA-C-0425P 4476550 |

| Item 2. | Code of Ethics. |

Not applicable to this filing.

| Item 3. | Audit Committee Financial Expert. |

Not applicable to this filing.

| Item 4. | Principal Accountant Fees and Services. |

Not applicable to this filing.

| Item 5. | Audit Committee of Listed Registrants. |

Not applicable to this filing.

| Item 6. | Investments. |

| (a) | Schedule of Investments is included as part of the Portfolio of Investments filed under Item 1 of this Form N-CSR. |

| (b) | Not applicable. |

| Item 7. | Financial Statements and Financial Highlights for Open-End 
 Management Investment Companies.                           |

Not applicable to closed-endinvestment companies.

| Item 8. | Changes in and Disagreements with Accountants for Open-End 
 Management Investment Companies.                           |

Not applicable to closed-endinvestment