Company: NMZ
Filing Date: 2025-07-07
Form Type: N-CSRS
Source: 0001193125-25-156000
Chunk: 48

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-07-07
Form: N-CSRS
Chunk 48
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.6625 |   |     |                | 0.6125 |   |

The annual complex-level fee, payable monthly, for each Fund was calculated according to the following schedule:

| Complex-Level Asset Breakpoint Level* |     | Complex-Level Fee |        |   |
| For the first $124.3 billion          |     |                   | 0.1600 | % |
| For the next $75.7 billion            |     |                   | 0.1350 |   |
| For the next $200 billion             |     |                   | 0.1325 |   |
| For eligible assets over $400 billion |     |                   | 0.1300 |   |

As of the end of the reporting period, the annual complex-level fee for each Fund was as follows: 202

| Fund |     | Complex-Level Fee |
| NVG  |     | 0.1585%           |
| NZF  |     | 0.1585%           |
| NMZ  |     | 0.1585%           |
| NMCO |     | 0.1585%           |
| NDMO |     | 0.1585%           |

Other Transactions with Affiliates: Each Fund is permitted to purchase or sell securities from or to certain other funds or accounts managed by the Sub-Adviseror by an affiliate of the Adviser (each an, “Affiliated Entity”) under specified conditions outlined in procedures adopted by the Board (“cross-trade”). These procedures have been designed to ensure that any cross-trade of securities by the Fund from or to an Affiliated Entity by virtue of having a common investment adviser (or affiliated investment adviser), common officer and/or common trustee complies with Rule 17a-7under the 1940 Act. These transactions are effected at the current market price (as provided by an independent pricing service) without incurring broker commissions. During the current fiscal period, the Funds engaged in cross-trades pursuant to these procedures as follows:

| Fund |     | Purchases |            |     | Sales |           |     | Realized    
 Gain (Loss) |          |
|:-----|:----|:----------|-----------:|:----|:------|----------:|:----|:------------|---------:|
| NVG  |     | $         |          – |     | $     |         – |     | $           |        – |
| NZF  |