Company: NMZ
Filing Date: 2025-01-06
Form Type: N-CSR
Source: 0001193125-25-002222
Chunk: 9

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-01-06
Form: N-CSR
Chunk 9
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 $70,100,000** |     | $363,900,000*** |

| * | The Fund carried forward 13,340,607 common shares from the 19,500,000 additional previously authorized common shares. |

| ** | For the period October 3, 2024 through October 31, 2024. For the period November 1, 2023 through October 2, 2024, the maximum aggregate offering was 90,000,000. |

| *** | For the period August 26, 2024 through October 31, 2024. For the period November 1, 2023 through August 25, 2024, the maximum aggregate offering was 250,000,000. |

During the current reporting period, NMZ sold common shares through its Shelf Offering at a weighted average premium to its NAV per common share in the accompanying table.

|                                                       |     |       NMZ |
| Common shares sold through shelf offering             |     | 1,078,509 |
| Weighted average premium to NAV per common share sold |     |     1.23% |

Refer to Notes to Financial Statements, for further details on Shelf Offerings and each Fund’s transactions. COMMON SHARE REPURCHASES The Funds’ Board of Trustees reauthorized an open-market share repurchase program, allowing each Fund to repurchase and retire an aggregate of up to approximately 10% of its outstanding common shares. During the current reporting period, the Funds did not repurchase any of their outstanding common shares. As of October 31, 2024, (and since the inception of the Funds’ repurchase programs), each Fund has cumulatively repurchased and retired its outstanding common shares as shown in the accompanying table.

|                                         |     |        NVG |     |        NZF |     |        NMZ |     |      NMCO |     |      NDMO |
| Common shares repurchased and retired   |     |    202,500 |     |     67,500 |     |          0 |     |         0 |     |         0 |
| Common shares authorized for repurchase |     | 21,350,000 |     | 19,370,000 |     | 11,050,000 |     | 5,480,000 |     | 5,955,000 |

10 About the Funds’ Benchmarks S&P Municipal Bond High Yield Index: An index designed to