NMZ on NYSE

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND is a fund registered in the United States, based in Chicago, active since 2003.² Its shares trade on NYSE under the symbol NMZ.²

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Last updated Oct 21, 2026.

Overview

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TickerNMZ on NYSE²
HeadquartersChicago, United States²
Incorporated inMA³
Business address333 W Wacker Drive, Chicago, Il 60606³
Legal formFUND²
Kind of organizationFund²
LEIBN7VUB6JBYC7TTWZRZ58²
StatusActive²
LEI statusIssued and current²
Registered addressC/O C T CORPORATION SYSTEM, 02110 Boston, United States²
Registered withSecurities and Exchange Commission, 0001266585²

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Corporate structure

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND sits at the top of its group. 1 entity, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

Bank of America Filed SCHEDULE 13D/A on NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, latest Apr 29, 2026 (5 filings since Jan 4, 2022)
Wells Fargo Filed SCHEDULE 13D/A on NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, latest Apr 29, 2026 (2 filings since Apr 12, 2023)
DEUTSCHE BANK AG\ Filed SC 13D/A on NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, latest Apr 26, 2023 (3 filings since Jun 13, 2022)

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND Chicago, Illinois, United States

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Leadership

Who has led NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, and when. Pick a name to see everywhere that person has worked.

Board members and other officers (34)

VP and TreasurerRobert Tanner Page Nov 5, 2025 to now⁴
Vice PresidentJames N. Nelson Iii. Mar 8, 2024 to Mar 8, 2024⁵
Vice PresidentMary Beth Ramsay Mar 11, 2024 to Mar 11, 2024⁶
VP and ControllerMarc Cardella Dec 3, 2024 to Dec 3, 2024⁷
Vice PresidentJohn M. McCann Apr 21, 2022 to Apr 21, 2022⁸
Chief Compliance OfficerBrett Black Jun 8, 2022 to Jun 8, 2022⁹
Vice PresidentTrey Stenersen Iii. Aug 15, 2022 to Aug 15, 2022¹⁰
Vice PresidentDeann Morgan Mar 6, 2020 to Mar 6, 2020¹¹
Vice PresidentE. Scott Wickerham Apr 18, 2019 to Apr 18, 2019¹²
Vice PresidentBrian J. Lockhart Aug 16, 2019 to Aug 16, 2019¹³
Vice PresidentJacques M. Longerstaey Aug 16, 2019 to Aug 16, 2019¹⁴
Vice PresidentJon Scott Meissner Oct 17, 2019 to Oct 17, 2019¹⁵
Vice PresidentWilliam T. Meyers Feb 28, 2018 to Feb 28, 2018¹⁶
TrusteeTerence J. Toth Aug 10, 2017 to Oct 25, 2023¹⁷
Vice PresidentMichael A. Perry Aug 11, 2017 to Aug 11, 2017¹⁸
Vice PresidentWilliam A. Siffermann Aug 11, 2017 to now¹⁹
Vice President and TreasurerNathaniel T. Jones Jun 24, 2016 to Oct 26, 2023²⁰
Vice PresidentDavid J. Lamb Mar 5, 2015 to Mar 5, 2015²¹
Vice President and TreasurerSherri A. Hlavacek Aug 14, 2015 to Aug 14, 2015²²
Vice PresidentJoel T. Slager Jul 26, 2013 to Jul 26, 2013²³
Vice PresidentKathleen L. Prudhomme Jan 12, 2011 to Jan 12, 2011²⁴
Vice PresidentMichelle Ann McCarthy Aug 5, 2010 to Aug 5, 2010²⁵
Vice PresidentGregory T. Mino Apr 1, 2009 to Apr 1, 2009²⁶
Vice PresidentJames Ruane Apr 1, 2009 to Apr 1, 2009²⁷
Vice PresidentMargo L. Cook Apr 1, 2009 to Apr 1, 2009²⁸
Vice PresidentNizida Arriaga Apr 1, 2009 to Apr 1, 2009²⁹
Vice PresidentWilliam T. Huffman Jr. Apr 1, 2009 to Apr 1, 2009³⁰
Vice President & TreasurerScott S. Grace Nov 27, 2009 to Nov 27, 2009³¹
Vice PresidentDemark L. Winget Jan 25, 2008 to Feb 28, 2018³²
Vice PresidentChristopher M. Rohrbacher Jun 9, 2008 to Oct 11, 2016³³
Vice PresidentCedric H. Antosiewicz Jun 7, 2007 to Jun 7, 2007³⁴
Assistant Vice PresidentWalter M. Kelly Sep 28, 2006 to Sep 28, 2006³⁵
Board memberTerence J. Toth Jul 2, 2008 to Jul 2, 2008³⁶
Board memberCarole E. Stone Jan 9, 2007 to Jan 9, 2007³⁷

Subsidiaries and ownership

Fund manager

Nuveen Investments²

Ownership links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); each one cites its LEI record.

Timeline

Mar 6, 20248-K Regulation FD disclosure³⁸
Oct 13, 20238-K Executive or director change³⁹
Feb 25, 20228-K Regulation FD disclosure⁴⁰
Oct 7, 2003Founded NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND is founded²

Filings

141 filings to the SEC since October 2021: 3 major events, 32 insider forms, 10 large holders, 96 other. The latest 20:

Oct 2, 2026424B3 PROSPECTUS FILED PURSUANT TO RULE 424(B)(3) EDGAR
Sep 25, 2026NPORT-P EDGAR
Sep 3, 20263 EDGAR
Sep 3, 20263 EDGAR
Sep 1, 20263 EDGAR
Aug 17, 2026N-PX EDGAR
Aug 6, 20264 PRIMARY DOCUMENT EDGAR
Aug 4, 20264 PRIMARY DOCUMENT EDGAR
Jul 28, 20264 PRIMARY DOCUMENT EDGAR
Jul 2, 2026N-CSRS NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND EDGAR
Jul 2, 2026DEF 14A NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND EDGAR
Jun 29, 20264 EDGAR
Jun 24, 2026NPORT-P EDGAR
Jun 11, 2026POS EX POST-EFFECTIVE AMENDMENT EDGAR
May 1, 2026N-23C-2 NOTICE OF INTENTION TO REDEEM SECURITIES EDGAR
Apr 29, 20264 EDGAR
Apr 29, 2026SCHEDULE 13D/A EDGAR
Apr 29, 2026SCHEDULE 13D/A EDGAR
Apr 24, 2026424B3 PROSPECTUS EDGAR
Mar 25, 2026NPORT-P EDGAR

The 141 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

17 open-market trades by officers, directors and large owners since October 2021: 10 buys and 7 sales. Grants, option exercises and gifts are left out.

Date	Who	Trade	Shares	Price	Value	Filing
Aug 4, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Buy	3	$10.19	$31	Form 4
Aug 4, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Sale	3	$10.26	$31	Form 4
Aug 3, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Buy	36	$10.21	$368	Form 4
Aug 3, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Sale	31	$10.25	$318	Form 4
Jul 31, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Sale	5	$10.33	$52	Form 4
Jul 24, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Buy	9	$10.24	$92	Form 4
Jul 24, 2026	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Sale	9	$10.18	$92	Form 4
Jun 22, 2026	MOSCHNER ALBIN F	Sale	2,912	$10.36	$30.2K	Form 4
Mar 5, 2026	Siffermann William AVice President	Buy	100	$10.48	$1.0K	Form 4
Dec 19, 2025	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Buy	1,000	$10.32	$10.3K	Form 4
Dec 19, 2025	MERRILL LYNCH, PIERCE, FENNER & SMITH INC.10% owner	Sale	1,000	$10.54	$10.5K	Form 4
Mar 21, 2025	Siffermann William AVice President	Buy	300	$11.08	$3.3K	Form 4
Oct 26, 2023	Jones Nathaniel T.Vice President and Treasurer	Buy	1,100	$8.33	$9.2K	Form 4
Oct 25, 2023	TOTH TERENCE JTrustee	Sale	4,208	$8.50	$35.8K	Form 4
Aug 10, 2023	MOSCHNER ALBIN F	Buy	4,900	$10.38	$50.9K	Form 4
Nov 28, 2022	TOTH TERENCE JTrustee	Buy	2,370	$10.97	$26.0K	Form 4
May 26, 2022	MOSCHNER ALBIN F	Buy	1,500	$12.33	$18.5K	Form 4

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Bank of AmericaSCHEDULE 13D/A, 5 filings Jan 4, 2022 to Apr 29, 2026⁴¹
Wells FargoSCHEDULE 13D/A, 2 filings Apr 12, 2023 to Apr 29, 2026⁴²
DEUTSCHE BANK AG\SC 13D/A, 3 filings Jun 13, 2022 to Apr 26, 2023⁴³

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

Fund	Shares	Value	Share of the fund	Change
Morgan Stanley	3,168,046	$33.5M	0.0%	+502,314
Guggenheim Capital LLC	2,376,749	$25.1M	0.2%	+333,311
Wells Fargo & Company/mn	2,359,288	$24.9M	0.0%	+1,480,618
Hennion & Walsh Asset Management, Inc.	2,217,036	$23.4M	0.7%	+577,934
Raymond James Financial Inc	1,930,236	$20.4M	0.0%	+810,274
UBS Group AG	1,531,663	$16.2M	0.0%	−388,040
Bank Of America Corp /de/	1,112,841	$11.8M	0.0%	+723,642
LPL Financial LLC	1,080,405	$11.4M	0.0%	+316,334
Van Eck Associates Corp	1,056,439	$11.2M	0.0%	+382,155
Rivernorth Capital Management, LLC	1,049,891	$11.1M	0.5%	New
J.w. Cole Advisors, Inc.	1,023,649	$10.8M	0.2%	New
Cetera Investment Advisers	1,002,529	$10.6M	0.0%	+604,904
Melone Private Wealth, LLC	846,287	$8.9M	3.4%	+173,665
Rockefeller Capital Management L.P.	592,054	$6.3M	0.0%	+460,827
Northwestern Mutual Wealth Management Co	516,095	$5.5M	0.0%	+175,474
Royal Bank Of Canada	450,516	$4.8M	0.0%	+172,999
Commonwealth Equity Services, LLC	446,955	$4.7M	0.0%	+226,886
Osaic Holdings, Inc.	311,793	$3.3M	0.0%	+89,903
Advisors Asset Management, Inc.	271,945	$2.9M	0.0%	+9,551
HighTower Advisors, LLC	265,084	$2.8M	0.0%	New
Baird Financial Group, Inc.	217,064	$2.3M	0.0%	+59,503
Platform Technology Partners	193,277	$2.0M	0.3%	+20,042
Kestra Advisory Services, LLC	189,986	$2.0M	0.0%	+18,388
OneDigital Investment Advisors LLC	187,628	$2.0M	0.0%	+1,142
AE Wealth Management LLC	172,917	$1.8M	0.0%	+14,061

13F reports cover disclosed long positions in U.S. stocks only.

SEC filer profile

How NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

Name on EDGARNUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND¹
CIK0001266585
Incorporated inMassachusetts¹
Business address333 W Wacker Drive, Chicago, IL 60606¹
Mailing address333 West Wacker Drive, Chicago, IL 60606¹
Phone312 917 8146¹
On EDGAR sinceOct 17, 2003¹
Filings655 in all: 3 (108), 4 (54), 40-17G (36), 425 (30), N-Q (30), NPORT-P (28), CORRESP (26), DEF 14A (24)¹
All 55 form types
N-CSRS (23), N-PX (23), N-CSR (22), 497 (17), N-2/A (16), 424B3 (15), DEFA14A (15), NSAR-A (14), NSAR-B (14), SC 13G/A (14), N-23C-2 (12), EFFECT (11), SC 13D/A (10), 40-17G/A (9), POS 8C (9), N-2 (8), N-CEN (8), PRE 14A (8), 40-APP/A (6), 486BPOS (6), POS EX (6), 497J (5), 8-K (5), AW (4), SC 13D (4), SC 13G (4), 40-APP (3), N-14 8C/A (3), SCHEDULE 13D/A (3), 424B5 (2), 8-A12B (2), N-14 8C (2), N-2ASR (2), 144 (1), 25 (1), 3/A (1), 424B2 (1), AW WD (1), CERTAMX (1), CERTNYS (1), N-2MEF (1), N-8A (1), N-CEN/A (1), N-PX/A (1), NO ACT (1), NPORT-EX (1), UPLOAD (1)
Latest filingsProxy statement (DEF 14A) Jul 2, 2026
Latest 8-K (8-K) Mar 6, 2024

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARNUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND filings on SEC EDGAR
2
GLEIFNUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND LEI record (BN7VUB6JBYC7TTWZRZ58)
3
SEC EDGARNUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND filings on SEC EDGAR
4
SEC EDGARRobert Tanner Page, VP and Treasurer
5
SEC EDGARJames N. Nelson Iii., Vice President
6
SEC EDGARMary Beth Ramsay, Vice President
7
SEC EDGARMarc Cardella, VP and Controller
8
SEC EDGARJohn M. McCann, Vice President
9
SEC EDGARBrett Black, Chief Compliance Officer
10
SEC EDGARTrey Stenersen Iii., Vice President
11
SEC EDGARDeann Morgan, Vice President
12
SEC EDGARE. Scott Wickerham, Vice President
13
SEC EDGARBrian J. Lockhart, Vice President
14
SEC EDGARJacques M. Longerstaey, Vice President
15
SEC EDGARJon Scott Meissner, Vice President
16
SEC EDGARWilliam T. Meyers, Vice President
17
SEC EDGARTerence J. Toth, Trustee
18
SEC EDGARMichael A. Perry, Vice President
19
SEC EDGARWilliam A. Siffermann, Vice President
20
SEC EDGARNathaniel T. Jones, Vice President and Treasurer
21
SEC EDGARDavid J. Lamb, Vice President
22
SEC EDGARSherri A. Hlavacek, Vice President and Treasurer
23
SEC EDGARJoel T. Slager, Vice President
24
SEC EDGARKathleen L. Prudhomme, Vice President
25
SEC EDGARMichelle Ann McCarthy, Vice President
26
SEC EDGARGregory T. Mino, Vice President
27
SEC EDGARJames Ruane, Vice President
28
SEC EDGARMargo L. Cook, Vice President
29
SEC EDGARNizida Arriaga, Vice President
30
SEC EDGARWilliam T. Huffman Jr., Vice President
31
SEC EDGARScott S. Grace, Vice President & Treasurer
32
SEC EDGARDemark L. Winget, Vice President
33
SEC EDGARChristopher M. Rohrbacher, Vice President
34
SEC EDGARCedric H. Antosiewicz, Vice President
35
SEC EDGARWalter M. Kelly, Assistant Vice President
36
SEC EDGARTerence J. Toth, Board member
37
SEC EDGARCarole E. Stone, Board member
38
SEC EDGARRegulation FD disclosure
39
SEC EDGARExecutive or director change
40
SEC EDGARRegulation FD disclosure
41
SEC EDGARBank of America SCHEDULE 13D/A on NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
42
SEC EDGARWells Fargo SCHEDULE 13D/A on NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND
43
SEC EDGARDEUTSCHE BANK AG\ SC 13D/A on NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND