0001193125-23-187239.txt : 20230714 0001193125-23-187239.hdr.sgml : 20230714 20230714154710 ACCESSION NUMBER: 0001193125-23-187239 CONFORMED SUBMISSION TYPE: 424B3 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230714 DATE AS OF CHANGE: 20230714 FILER: COMPANY DATA: COMPANY CONFORMED NAME: NUVEEN MUNICIPAL INCOME FUND INC CENTRAL INDEX KEY: 0000830271 IRS NUMBER: 363566347 STATE OF INCORPORATION: MN FISCAL YEAR END: 1031 FILING VALUES: FORM TYPE: 424B3 SEC ACT: 1933 Act SEC FILE NUMBER: 333-237289 FILM NUMBER: 231089062 BUSINESS ADDRESS: STREET 1: 333 W WACKER DR CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3129178200 MAIL ADDRESS: STREET 1: 333 W WACKER DRIVE CITY: CHICAGO STATE: IL ZIP: 60606 424B3 1 d526888d424b3.htm NUVEEN MUNICIPAL INCOME FUND, INC. Nuveen Municipal Income Fund, Inc.

Filed Pursuant to Rule 424(b)(3)

File No. 333-237289

NUVEEN MUNICIPAL INCOME FUND, INC.

(NYSE: NMI)

(THE “FUND”)

SUPPLEMENT DATED JULY 14, 2023

TO THE FUND’S PROSPECTUS AND STATEMENT OF ADDITIONAL INFORMATION (“SAI”)

DATED SEPTEMBER 23, 2020, EACH AS SUPPLEMENTED

The Board of Directors of the Fund has approved a change to the Fund’s maturity policy.

Effective immediately, (1) the first sentence in the seventh bullet point of the fourth paragraph in the section of the Fund’s Prospectus Summary entitled “Investment Objective and Policies”; (2) the first sentence under “Maturity and Duration” in the section of the Fund’s Prospectus entitled “The Fund’s Investments – Municipal Securities”; and (3) the first two sentences in the eighth paragraph under “Portfolio Composition – Municipal Securities” in the SAI are deleted in their entirety and replaced with the following:

Under normal market conditions, the Fund will generally maintain an investment portfolio with an overall weighted average maturity of greater than 10 years.

PLEASE KEEP THIS WITH YOUR

FUND’S PROSPECTUS AND SAI FOR FUTURE REFERENCE