Nuveen Municipal High Income Opportunity Fund

NMZ

Exchange: NYSE
SEC CIK: 0001266585

SEC filings (opens in a new tab)

In the last 90 days, Nuveen Municipal High Income Opportunity Fund insiders filed 3 open-market purchases and 3 sales; 213 institutions reported holding it in 13F filings for Q2 2026, worth $358.6M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Nuveen Municipal High Income Opportunity Fund changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of NMZ: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Of which not filed for Q4 2025	Q4 2025	Change
Holders	124	4	130	+10
Shares	18.7M	89.7K	18.9M	+349.1K (+1.9%)
Value	$184.9M	$949.8K	$193.0M	+$9.08M (+4.9%)

4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (24)

Institutions that held Nuveen Municipal High Income Opportunity Fund at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to NMZ in Q4 2025
Institution	Shares	Value	% of portfolio
Advisors Asset Management, Inc.	167,745	$1.71M	0.03%
HighPoint Advisor Group LLC	117,347	$1.20M	0.03%
Ellis Investment Partners, LLC	105,890	$1.08M	0.19%
Worthington Financial Partners, LLC	70,200	$715.3K	0.63%
Landscape Capital Management, L.L.C.	65,058	$662.9K	0.04%
Readystate Asset Management LP	58,460	$595.7K	0.03%
Colony Group, LLC	35,229	$359.0K	0.00%
Susquehanna International Group, LLP	34,466	$351.2K	0.00%
XTX Topco Ltd	28,366	$289.1K	0.01%
FF Advisors,LLC	27,413	$279.3K	0.12%
Marex Group plc	27,100	$276.1K	0.00%
Wolverine Asset Management LLC	23,586	$240.3K	0.00%
Abel Hall, LLC	15,000	$152.8K	0.04%
Cane Capital Partners, LLC	14,400	$146.7K	0.06%
Grimes & Company, Inc.	13,767	$140.3K	0.00%
XML Financial, LLC	12,700	$129.4K	0.01%
Citadel Advisors LLC	12,468	$127.0K	0.00%
Blueline Advisors LLC	11,278	$114.9K	0.09%
Ramiah Investment Group	10,451	$106.5K	0.09%
Garton & Associates Financial Advisors LLC	8,862	$90.3K	0.05%
Allworth Financial LP	6,000	$61.1K	0.00%
International Assets Investment Management, LLC	679	$6.92K	0.00%
Maryland Capital Advisors Inc.	427	$4.35K	0.00%
Assetmark, Inc	336	$3.42K	0.00%

Sold out (14)

Institutions that held Nuveen Municipal High Income Opportunity Fund at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of NMZ in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Regatta Capital Group, LLC	109,768	$1.16M
Invesco Ltd.	36,732	$389.0K
Williams Jones Wealth Management, LLC.	34,963	$370.3K
Focus Financial Network, Inc.	30,301	$322.9K
Kestra Private Wealth Services, LLC	16,907	$179.1K
HRT Financial LP	15,909	$168.0K
National Asset Management, Inc.	11,968	$126.7K
Hudson Valley Investment Advisors Inc	11,500	$121.8K
Horizon Kinetics Asset Management LLC	10,369	$109.8K
Fifth Third Bancorp	8,010	$84.8K
Advisory Services Network, LLC	6,965	$73.8K
CX Institutional	2,065	$22.0K
Johnson Financial Group, Inc.	715	$7.62K
Key Financial Inc	11	$117

Not filed for Q4 2025 yet (4)

Institutions that held Nuveen Municipal High Income Opportunity Fund at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding NMZ in Q3 2025 that haven't filed for Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
LexAurum Advisors, LLC	57,357	$607.4K
EWG Elevate Inc.	17,825	$188.8K
Sonora Investment Management Group, LLC	12,154	$128.7K
Guerra Advisors Inc	2,352	$24.9K