Company: NMI
Filing Date: 2025-07-07
Form Type: N-CSRS
Source: 0001193125-25-155990
Chunk: 3

Company: NUVEEN MUNICIPAL INCOME FUND INC
Filing Date: 2025-07-07
Form: N-CSRS
Chunk 3
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     | 1,005,000 |

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About the Funds’ Benchmarks

S&P Municipal Bond Index: An index designed to measure the performance of the tax-exemptU.S. municipal bond market. Index returns assume reinvestment of distributions, but do not reflect any applicable sales charges or management fees.

S&P Municipal Yield Index: An index that is structured so that 70% of the index consists of bonds that are either not rated or are rated below investment grade, 20% are rated BBB/Baa, and 10% are rated single A. Index returns assume reinvestment of distributions, but do not reflect any applicable sales charges or management fees.

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Fund Performance and Holdings

The Fund Performance and Holding Summaries for each Fund are shown below within this section of the report.

Fund Performance

Performance data shown represents past performance and
does not predict or guarantee future results. Current performance may be higher or lower than the data shown. Returns do not reflect the deduction of taxes that shareholders may have to pay on Fund distributions or upon the sale of Fund shares.
Returns at NAV are net of Fund expenses, and assume reinvestment of distributions. Comparative index return information is provided for the Fund’s shares at NAV only. Indexes are not available for direct investment.

Total returns for a period of less than one year are not annualized (i.e. cumulative returns). Since inception returns are shown for share classes that have less than 10-years of performance. For performance, current to the most recent month-end visit Nuveen.com or call (800) 257-8787.

Holding Summaries

The Holdings Summaries data relates to the securities
held in each Fund’s portfolio of investments as of the end of this reporting period. It should not be construed as a measure of performance for the Fund itself. Holdings are subject to change. Refer to the Fund’s Portfolio of Investments
for individual security information.

For financial reporting purposes, the ratings disclosed are the highest rating given by one of the following national rating
agencies: Standard & Poor’s Group, Moody’s Investors Service, Inc. or Fitch, Inc. This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are
subject to change. AAA, AA, A and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national rating agencies.

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Refer to the Gloss