Nuveen NMZ revises plans for share issuance proceeds

Nuveen Municipal High Income Opportunity Fund (NMZ) revised its use-of-proceeds disclosure for net proceeds from Common Share issuances.

Rhea-AI Filing Summary

Nuveen Municipal High Income Opportunity Fund (NMZ) revised its use-of-proceeds disclosure for net proceeds from Common Share issuances. The Fund currently anticipates it will be able to invest substantially all net proceeds in investments that meet its objectives and policies within approximately three months of receiving them. Pending investment, proceeds are anticipated to be invested in short- or long-term securities issued by the U.S. Government and its agencies or instrumentalities, or in high-quality, short-term money market instruments. The Fund may also use proceeds to pay distributions to shareholders.

Key Figures

Anticipated investment period: Approximately three months

1 metrics

Anticipated investment period Approximately three months Period after receipt of proceeds to invest substantially all net proceeds

Key Terms

net proceeds, investment objectives and policies, money market instruments

3 terms

net proceeds financial

"The net proceeds from the issuance of Common Shares hereunder"

The amount of money a company actually keeps from a sale or fundraising after paying all direct costs and fees, similar to take-home pay after taxes and deductions. Investors care because net proceeds determine how much cash is available for things that affect value—paying debt, funding projects, buying assets, or returning money to shareholders—so it influences future growth potential and financial health.

investment objectives and policies financial

"meet the Fund’s investment objectives and policies"

money market instruments financial

"high quality, short-term money market instruments"

Offering Details

shelf

Offering

Offering Type shelf

Securities Offered Common Shares

Use of Proceeds Net proceeds are to be invested in accordance with the Fund’s investment objectives and policies; the Fund may also use proceeds to pay distributions to shareholders.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How does NMZ plan to invest proceeds from Common Share issuances?

NMZ currently anticipates it will be able to invest substantially all net proceeds in investments that meet its objectives and policies within approximately three months of receipt. Pending investment, proceeds are anticipated to be invested in short- or long-term securities issued by the U.S. Government and its agencies or instrumentalities, or in high-quality, short-term money market instruments. The Fund may also use proceeds to pay distributions to shareholders.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 02:32 PM Accepted by SEC EDGAR 10/02/2026 - 09:33 AM Learn about SEC filing dates

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-277778

Nuveen Municipal High Income Opportunity Fund (NYSE: NMZ)

(the “Fund”)

Supplement Dated October 2, 2026

to the Fund’s Prospectus Supplement Dated April 4, 2024 (the “Prospectus Supplement”)

The second paragraph in the section of the Prospectus Supplement titled “Use of Proceeds” is hereby deleted and replaced with the following:

The net proceeds from the issuance of Common Shares hereunder will be invested in accordance with the Fund’s investment objectives and policies as set forth in the accompanying prospectus. The Fund currently anticipates that it will be able to invest substantially all of the net proceeds in investments that meet the Fund’s investment objectives and policies within approximately three months of the receipt of such proceeds. Pending investment, it is anticipated that the proceeds will be invested in short-term or long-term securities issued by the U.S. Government and its agencies or instrumentalities or in high quality, short-term money market instruments. In addition, the Fund may use such proceeds to pay distributions to shareholders.

PLEASE KEEP THIS WITH YOUR

FUND’S PROSPECTUS SUPPLEMENT

FOR FUTURE REFERENCE

EGN-NMZP-1026P