Company: NMZ
Filing Date: 2025-01-06
Form Type: N-CSR
Source: 0001193125-25-002222
Chunk: 8

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-01-06
Form: N-CSR
Chunk 8
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, is to make regular monthly cash distributions to holders of its common shares (stated in terms of a fixed cents per common share dividend distribution rate which may be set from time to time). The Fund intends to distribute all or substantially all of its net investment income each year through its regular monthly distribution and to distribute realized capital gains at least annually. In addition, in any monthly period, to maintain its declared per common share distribution amount, the Fund may distribute more or less than its net investment income during the period. In the event the Fund distributes more than its net investment income during any yearly period, such distributions may also include realized gains and/or a return of capital. To the extent that a distribution includes a return of capital the NAV per share may erode. If the Fund’s distribution includes anything other than net investment income, the Fund will provide a notice to shareholders of its best estimate of the distribution sources at that the time of the distribution. These estimates may not match the final tax characterization (for the full year’s distributions) contained in shareholders’ 1099-DIVforms after the end of the year. NUVEEN CLOSED-ENDFUND DISTRIBUTION AMOUNTS The Nuveen Closed-EndFunds’ monthly and quarterly periodic distributions to shareholders are posted on www.nuveen.com and can be found on Nuveen’s enhanced closed-endfund resource page, which is at https://www.nuveen.com/resource-center-closed-end-funds,along with other Nuveen closed-endfund product updates. To ensure timely access to the latest information, shareholders may use a subscribe function, which can be activated at this web page ( https://www.nuveen.com/subscriptions ). 9 Common Share Information (continued) COMMON SHARE EQUITY SHELF PROGRAMS During the current reporting period, NVG, NMZ, NMCO and NDMO were authorized by the Securities and Exchange Commission to issue additional common shares through an equity shelf program (Shelf Offering). Under these programs, NVG, NMZ, NMCO and NDMO, subject to market conditions, may raise additional capital from time to time in varying amounts and offering methods at a net price at or above the Fund’s NAV per common share. The maximum aggregate offering under these Shelf Offerings are as shown in the accompanying table.

|                            |     | NVG       |     | NMZ*      |     | NMCO          |     | NDMO            |
| Maximum aggregate offering |     | Unlimited |     | Unlimited |     |