Company: NMZ
Filing Date: 2025-07-07
Form Type: N-CSRS
Source: 0001193125-25-156000
Chunk: 40

Company: NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
Filing Date: 2025-07-07
Form: N-CSRS
Chunk 40
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     |  Liquidation 
   Preference |
| NMZ  |     |   2028 |     |         870 |     |  $87,000,000 |
|      |     |   2031 |     |       1,700 |     | $170,000,000 |
|      |     |   2032 |     |       1,000 |     | $100,000,000 |

The Fund is obligated to redeem its AMTP Shares by the date as specified in its offering document (“Term Redemption Date”), unless earlier redeemed by the Fund. AMTP Shares are subject to optional and mandatory redemption in certain circumstances. The AMTP Shares may be redeemed at the option of the Fund, subject to payment of premium for approximately six months following the date of issuance (“Premium Expiration Date”), and at the redemption price per share thereafter. The redemption price per share is equal to the sum of the liquidation preference per share plus any accumulated but unpaid dividends. AMTP Shares are short-term or short/intermediate-term instruments that pay a variable dividend rate tied to a short-term index, plus an additional fixed “spread” amount which is initially established at the time of issuance and may be adjusted in the future based upon a mutual agreement between the majority owner and the Fund. From time-to-timethe majority owner may propose to the Fund an adjustment to the dividend rate. Should the majority owner and the Fund fail to agree upon an adjusted dividend rate, and such proposed dividend rate adjustment is not withdrawn, the Fund will be required to redeem all outstanding shares upon the end of a notice period. In addition, the Fund may be obligated to redeem a certain amount of the AMTP Shares if the Fund fails to maintain certain asset coverage and leverage ratio requirements and such failures are not cured by the applicable cure date. The Term Redemption Date and Premium Expiration Date for the Fund’s AMTP Shares are as follows:

| Fund 
 NMZ  |     | Notice  
 Period  
 360-day 
 360-day |     | Series 
   2028 
   2031 |     | Term            
 Redemption Date 
 March 1, 2028*  
 April 1, 2031*  |     | Premium         
 Expiration Date 
 August 31, 2018 
 April 17, 2023  |
|:-----|:----|:--------|:----|-------:|:----|:----------------|:----|:----------------|
|      |     |