Form 4 Filing for NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

This filing details significant transactions by Bank of America Corp /DE/ and Merrill Lynch, Pierce, Fenner & Smith Inc. on December 19, 2025, concerning the common stock of NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND (NMZ). Both entities, holding over 10% ownership, reported a purchase of 1,000 shares at $10.32 per share and a sale of 1,000 shares at $10.54 per share. The filing includes disclaimers regarding beneficial ownership and group activity, as outlined in footnotes, asserting that these disclosures do not constitute admissions for legal purposes. The reporting persons have agreed to remit any potentially recoverable short-swing profits to the issuer, without conceding their ownership status or the applicability of Section 16 of the Exchange Act.