Nuveen Municipal Income Fund revises use of proceeds

The Fund anticipates investing substantially all net proceeds within approximately three months of receipt, with specified interim investment options.

Rhea-AI Filing Summary

Nuveen Municipal Income Fund, Inc. revised how it expects to use net proceeds from its Common Stock issuance. The Fund anticipates investing substantially all of the net proceeds in investments consistent with its objectives and policies within approximately three months after receipt.

Pending investment, proceeds are expected to go into securities issued by the U.S. Government and its agencies or instrumentalities, or high-quality, short-term money market instruments. The Fund may also use proceeds to pay shareholder distributions.

Key Figures

Anticipated investment period: Approximately three months

1 metrics

Anticipated investment period Approximately three months After receipt of 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 Stock"

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

"in accordance with 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 Stock

Use of Proceeds Net proceeds are expected to be invested in accordance with the Fund’s investment objectives and policies; pending investment, they are expected to be invested in specified government securities or high-quality, short-term money market instruments. 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 NMI plan to use proceeds from its Common Stock issuance?

The Fund anticipates investing substantially all net proceeds in investments consistent with its objectives and policies within approximately three months after receipt. Pending investment, proceeds are expected to be invested in securities issued by the U.S. Government and its agencies or instrumentalities, or high-quality, short-term money market instruments. The Fund may also use proceeds to pay shareholder distributions.

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 - 09:31 AM Learn about SEC filing dates

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-295103

Nuveen Municipal Income Fund, Inc. (NYSE: NMI)

(the “Fund”)

Supplement Dated October 2, 2026

to the Fund’s Prospectus Supplement Dated June 12, 2026 (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 Stock 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-NMIP-1026P