| UNITED STATES |
| SECURITIES AND EXCHANGE COMMISSION |
| Washington, D.C. 20549 |
| Notice of Effectiveness |
| Effectiveness Date: |
December 17,
2025 3:00 P.M.
|
| Form: |
N-14 8C |
| CIK: |
0001266585 |
| Company Name: |
NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND |
| File Number: |
333-290590 |
|