Nuveen Municipal Income Fund to change name 2026

Nuveen Municipal Income Fund, Inc. (NMI) will change its name to Nuveen Municipal High Income Fund, Inc. effective November 16, 2026, as approved by its Board of Trustees.

Rhea-AI Filing Summary

Nuveen Municipal Income Fund, Inc. (NMI) will change its name to Nuveen Municipal High Income Fund, Inc. effective November 16, 2026, as approved by its Board of Trustees. The fund sponsor states that this name change is not expected to result in any changes to the investment process used in managing the fund.

Key Figures

Effective date of name change: November 16, 2026 Registration number: 333-295103

2 metrics

Effective date of name change November 16, 2026 Date when the fund’s new name becomes effective

Registration number 333-295103 Securities registration number associated with the fund

Key Terms

Prospectus, Statement of Additional Information, investment process

3 terms

Prospectus regulatory

"Supplement ... to the Fund’s Currently Effective Prospectus"

A prospectus is a detailed document that explains a company's plans for offering new shares or investments to the public. It’s important because it provides potential investors with key information about the company’s business, risks, and how they might make money, helping them decide whether to invest. Think of it as a guidebook for understanding what you're buying into.

Statement of Additional Information regulatory

"Prospectus and Statement of Additional Information (“SAI”)"

investment process financial

"not expected to result in any changes to the investment process"

FAQ

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

What name change is Nuveen Municipal Income Fund, Inc. (NMI) implementing?

Nuveen Municipal Income Fund, Inc. will change its name to Nuveen Municipal High Income Fund, Inc. effective November 16, 2026, following approval by its Board of Trustees.

When does the NMI fund name change become effective?

The name change for NMI becomes effective on November 16, 2026, when the fund will be known as Nuveen Municipal High Income Fund, Inc.

Will NMI’s investment process change with the new fund name?

The fund sponsor states that the change to Nuveen Municipal High Income Fund, Inc. is not expected to result in any changes to the investment process used in managing the fund.

Who approved the NMI fund name change?

The Board of Trustees of Nuveen Municipal Income Fund, Inc. approved changing the fund’s name to Nuveen Municipal High Income Fund, Inc., effective November 16, 2026.

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

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Available on EDGAR 08/31/2026 - 09:33 AM EDT Accepted by SEC EDGAR 08/31/2026 - 09:30 AM EDT 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 August 31, 2026

to the Fund’s Currently Effective Prospectus and Statement of Additional Information (“SAI”)

The Board of Trustees of the Fund has approved changes to the Fund’s name. Accordingly, effective November 16, 2026, the Fund’s name will be changed from “Nuveen Municipal Income Fund, Inc.” to “Nuveen Municipal High Income Fund, Inc.”

The change in the Fund’s name is not expected to result in any changes to the investment process used in managing the Fund.

PLEASE KEEP THIS WITH YOUR

FUND’S PROSPECTUS AND SAI FOR FUTURE REFERENCE

EGN-NMIP-0826P