UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

~~Washington~~WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

~~of the~~ Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October ~~August~~13, 52023 (October 13, ~~2016~~2023)

Nuveen Municipal Income Fund, Inc.

(Exact name of registrant as specified in its charter)

Minnesota		811-05488		36-3566347
(State or other jurisdiction of incorporation)		(~~CommissionFile~~Commission File Number)		(~~I.R.S.~~IRS Employer Identification ~~No.~~Number)

333 West Wacker DriveChicago, Illinois		60606
333 West Wacker Drive Chicago, Illinois	60606
(Address of principal executive offices)		(Zip Code)
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code: (800) 257-8787

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨☐ Pre-commencement communications pursuant to Rule ~~20e~~13e-4(c) under the Exchange Act (17 CFR 240.~~20e~~13e-4(c))

~~Item~~Securities ~~8.01.~~registered ~~Other~~pursuant ~~Events.~~to Section 12(b) of the Act:

~~Investment~~Title ~~Policy~~of ~~Revision~~each class Trading Symbol(s) Name of each exchange on which registered Common Stock NMI New York Stock Exchange

~~Effective~~Indicate ~~August~~by 5,check ~~2016,~~mark awhether ~~number~~the ofregistrant ~~Nuveen~~is ~~AMT-Free~~an ~~and~~emerging ~~non-AMT~~growth ~~municipal~~company ~~closed-end~~as ~~funds~~defined ~~have~~in ~~approved~~Rule ~~changes~~405 toof ~~their~~the ~~investment policies~~Securities ~~altering~~Act ~~the~~of 1933 ~~limits~~(§230.405 onof ~~exposure~~this tochapter) ~~securities~~or ~~subject~~Rule to12b-2 of the ~~federal~~Securities ~~alternative~~Exchange ~~minimum~~Act ~~tax~~of ~~applicable~~1934 to(§240.12b-2 ~~individuals~~of ~~(AMT~~this chapter).

~~AMT FREE~~☐ ~~MUNICIPAL~~Emerging ~~FUNDS~~growth company

~~The~~If ~~two~~an ~~AMT-Free~~emerging ~~funds~~growth ~~listed~~company, ~~below~~indicate ~~adopted~~by acheck ~~new~~mark ~~investment~~if ~~policy~~the toregistrant ~~require~~has ~~the~~elected ~~funds~~not to ~~invest~~use ~~100% of its managed assets in securities~~ the ~~income~~extended ~~from~~transition ~~which~~period isfor ~~exempt~~complying ~~from~~with ~~AMT at the time of purchase. While the funds were previously being managed as such, the~~ new ~~AMT~~or revised ~~policy~~financial ~~will~~accounting bestandards inprovided ~~addition~~pursuant to ~~the current policy which requires that only 80% of the funds’ assets be invested in securities exempt from the AMT.~~Section ~~The~~13(a) ~~80% policy was adopted to meet the “Names Rule” under the Investment Company Act~~ of ~~1940 and is subject to change by~~ the ~~board~~Exchange ~~upon 60 days’ notice to shareholders~~Act. ~~The~~ ☐ new 100% AMT policy is subject to change by the fund’s board without shareholder notice. The new AMT policy is consistent with Nuveen’s other AMT-Free funds. The new policy was adopted for the following funds:

~~Ticker~~Item ~~Nuveen~~5.02 ~~Fund~~Departure ~~Name~~of ~~NRK~~Directors ~~Nuveen~~or ~~New~~Certain ~~York~~Officers; ~~AMT-Free~~Election ~~Municipal~~of ~~Income~~Directors; ~~Fund~~Appointment ~~NKX~~of ~~Nuveen~~Certain ~~California~~Officers; ~~AMT-Free~~Compensatory ~~Municipal~~Arrangements ~~Income~~of ~~Fund~~Certain Officers.

~~MUNICIPAL~~On ~~FUNDS~~October 13, ~~THAT~~2023, ~~ARE~~Nuveen ~~NOT~~Municipal ~~AMT~~Income Fund, Inc. (the “Fund”) announced that the board of directors of the Fund (the “Board”) and the boards of certain other investment companies advised by Nuveen Fund Advisors, LLC, the Fund’s investment adviser (the “Adviser”) and its affiliates (collectively, the “Nuveen Funds”), as well as certain mutual funds advised by Teachers Advisors, LLC that are series of the TIAA-~~FREE~~CREF Funds and the TIAA-CREF Life Funds (collectively, the “TC Funds,” and together with the Nuveen Funds, the “Fund Complex”) separately determined to approve the alignment and consolidation of the membership of the boards so that funds in the Fund Complex are overseen by the same board members (the “Board Consolidation”).

~~All~~The ofBoard ~~the~~Consolidation ~~Nuveen~~is ~~municipal~~expected ~~closed-end~~to ~~funds~~(i) generate ~~listed~~cost ~~below~~efficiencies ~~have~~and ~~adopted~~expense ansavings ~~investment~~that ~~policy~~would tobenefit Fund ~~limit~~shareholders; (ii) align the ~~amount~~Fund ~~securities~~Complex ~~subject~~and tothe ~~AMT~~consolidated toBoard ~~no more~~with ~~than~~Nuveen’s ~~20%~~operating ofmodel ato ~~fund’s~~promote ~~managed~~growth ~~assets. As~~across ~~set~~new, ~~forth~~as ~~below~~well ~~the~~as ~~vast~~similar, ~~majority~~investment ofproducts; ~~these~~(iii) facilitate ~~funds~~negotiating ~~previously~~with ~~did~~vendors ~~not~~as ~~have~~ a ~~limit~~unified onFund Complex ~~AMT~~to ~~securities~~obtain ~~while~~expected ~~six~~economies ~~funds~~of ~~had~~scale aand ~~30%~~to ~~limit~~standardize onservicing; ~~AMT securities.~~(iv) ~~The~~expand ~~new~~marketing ~~AMT~~and ~~investment~~distribution ~~policy~~opportunities ~~will replace~~associated ~~each~~with ~~fund’s~~presenting ~~old~~the ~~investment~~TC ~~policy. Together~~Funds ~~with~~and aNuveen ~~number~~Funds ofto ~~other~~the ~~Nuveen~~marketplace ~~funds,~~as ~~these~~one ~~changes~~Fund ~~will~~Complex ~~create~~and agrow ~~uniform~~investor engagement; ~~20%~~and ~~limit~~(v) eliminate onduplicate ~~AMT~~efforts ~~securities~~in ~~across~~board ~~Nuveen’s municipal complex~~operations. The ~~following~~Board isand aFund ~~list~~management ofbelieve ~~the~~that ~~funds adopting~~ the ~~new~~prospective ~~20%~~benefits ~~limit~~of ~~and~~the ~~each~~Board ~~fund’s~~Consolidation ~~previous~~will ~~investment~~be ~~policy~~advantageous ~~with respect~~ to ~~AMT~~all ~~securities~~Fund shareholders.

Ticker	Nuveen Fund Name	Prior AMTExposure Limit	New AMT PolicyLimit
NAZ	Nuveen Arizona Premium Income Municipal Fund	30%		20	%
NEV	Nuveen Enhanced Municipal Value Fund	30%		20	%
NHA	Nuveen Municipal 2021 Target Term Fund	30%		20	%
NID	Nuveen Intermediate Duration Municipal Term Fund	30%		20	%
NIQ	Nuveen Intermediate Duration Quality Municipal Term Fund	30%		20	%
NMZ	Nuveen Municipal High Income Opportunity Fund	30%		20	%
NAC	Nuveen California Dividend Advantage Municipal Fund	No Limit		20	%
NAD	Nuveen Dividend Advantage Municipal Fund	No Limit		20	%
NAN	Nuveen New York Dividend Advantage Municipal Fund	No Limit		20	%
NCA	Nuveen California Municipal Value Fund, Inc.	No Limit		20	%
NIM	Nuveen Select Maturities Municipal Fund	No Limit		20	%
NKG	Nuveen Georgia Dividend Advantage Municipal Fund 2	No Limit		20	%
NMI	Nuveen Municipal Income Fund, Inc.	No Limit		20	%

Pursuant to resolutions adopted by the Board in connection with the Board Consolidation, the size of the Board will be set at twelve (12) members effective January 1, 2024, and Joseph A. Boateng, Michael A. Forrester, Thomas J. Kenny and Loren M. Starr have been appointed to the Board as independent board members effective January 1, 2024. Each of Mr. Boateng, Mr. Forrester, Mr. Kenny and Mr. Starr currently serve as members of the TC Funds’ boards. Biographical information of each of Mr. Boateng, Mr. Forrester, Mr. Kenny and Mr. Starr is as follows:

NMS	Nuveen Minnesota Municipal Income Fund	No Limit	20	%
NMT	Nuveen Massachusetts Premium Income Municipal Fund	No Limit	20	%
NMY	Nuveen Maryland Premium Income Municipal Fund	No Limit	20	%
NNC	Nuveen North Carolina Premium Income Municipal Fund	No Limit	20	%
NNY	Nuveen New York Municipal Value Fund, Inc.	No Limit	20	%
NOM	Nuveen Missouri Premium Income Municipal Fund	No Limit	20	%
NPV	Nuveen Virginia Premium Income Municipal Fund	No Limit	20	%
NQP	Nuveen Pennsylvania Investment Quality Municipal Fund	No Limit	20	%
NTC	Nuveen Connecticut Premium Income Municipal Fund	No Limit	20	%
NTX	Nuveen Texas Quality Income Municipal Fund	No Limit	20	%
NUM	Nuveen Michigan Quality Income Municipal Fund	No Limit	20	%
NUO	Nuveen Ohio Quality Income Municipal Fund	No Limit	20	%
NUV	Nuveen Municipal Value Fund, Inc.	No Limit	20	%
NVX	Nuveen California Dividend Advantage Municipal Fund 2	No Limit	20	%
NXJ	Nuveen New Jersey Dividend Advantage Municipal Fund	No Limit	20	%
NZF	Nuveen Enhanced Municipal Credit Opportunities Fund	No Limit	20	%
NZH	Nuveen California Dividend Advantage Municipal Fund 3	No Limit	20	%

Joseph A. Boateng. Mr. Boateng has been a TC Board Member since 2019. Since 2007, Mr. Boateng has served as the Chief Investment Officer for Casey Family Programs. He was previously Director of U.S. Pension Plans for Johnson & Johnson from 2002-2006. Mr. Boateng is a board member of the Lumina Foundation and Waterside School, an emeritus board member of Year Up Puget Sound, member of the Investment Advisory Committee and former chair for the Seattle City Employees’ Retirement System, and an investment committee member for The Seattle Foundation. Mr. Boateng received a B.S. from the University of Ghana and an M.B.A. from the University of California, Los Angeles.

~~SIGNATURES~~Michael A. Forrester. Mr. Forrester has been a TC Board Member since 2007. From 2007 to 2021, he held various positions with Copper Rock Capital Partners, LLC (“Copper Rock”), including Chief Executive Officer (2014-2021), Chief Operating Officer (“COO”) (2007-2014) and Board Member (2007-2021). Mr. Forrester is currently a member of the Independent Directors Council Governing Council of the Investment Company Institute. He also serves on the Board of Trustees of the Dexter Southfield School. Mr. Forrester has a B.A. from Washington and Lee University.

~~Pursuant~~Thomas toJ. Kenny. Mr. Kenny has been a TC Board Member since 2011. Mr. Kenny served as an Advisory Director (2010-2011), Partner (2004-2010), Managing Director (1999-2004) and Co-Head (2002-2010) of Goldman Sachs Asset Management’s Global Cash and Fixed Income Portfolio Management team, having worked at Goldman Sachs since 1999. Mr. Kenny is a Director and the ~~requirements~~Chair of the ~~Securities~~Finance ~~Exchange~~and ~~Act~~Investment Committee of ~~1934~~Aflac Incorporated and a Director of ParentSquare. He is a Former Director and Finance Committee Chair for the, Sansum Clinic; Former Advisory Board Member, B’Box; Former Member of the ~~registrant~~University ~~has~~of ~~duly~~California ~~caused~~at ~~this~~Santa ~~report~~Barbara toArts beand ~~signed~~Lectures onAdvisory ~~its~~Council; ~~behalf~~Former byInvestment Committee Member, Cottage Health System; and Former President of the ~~undersigned~~Board ~~hereunto~~of ~~duly~~Crane ~~authorized~~Country Day School. He received a B.A. from the University of California, Santa Barbara, and an M.S. from Golden Gate University. He is a Chartered Financial Analyst and has served as Chairman of CREF since 2017.

Loren M. Starr. Mr. Starr has been a TC Board Member since 2022. Mr. Starr was Vice Chair, Senior Managing Director from 2020 to 2021, and Chief Financial Officer, Senior Managing Director from 2005 to 2020, for Invesco Ltd. Mr. Starr is also a Director for AMG. He is former Chair and member of the Board of Directors, Georgia Leadership Institute for School Improvement (GLISI); former Chair and

member of the Board of Trustees, Georgia Council on Economic Education (GCEE). Mr. Starr received a B.A. and a B.S. from Columbia College, an M.B.A. from Columbia Business School, and an M.S. from Carnegie Mellon University.

Two current members of the Board of the Fund, Jack B. Evans and William C. Hunter, are expected to retire effective as of December 31, 2023 in accordance with the retirement policies adopted by the Board.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

NUVEEN MUNICIPAL INCOME FUND, INC.

Date: August 5, 2016

/s/ Kevin J. McCarthy

Kevin J. McCarthy

Vice President and Secretary

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