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.

Q1 2026 vs. Q4 2025

How the institutions holding Nuveen Municipal High Income Opportunity Fund changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of NMZ: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	130	4	138	+12
Shares	18.9M	145.1K	20.2M	+1.38M (+7.4%)
Value	$193.0M	$1.48M	$209.4M	+$17.8M (+9.3%)

4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (23)

Institutions that held Nuveen Municipal High Income Opportunity Fund at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to NMZ in Q1 2026
Institution	Shares	Value	% of portfolio
Robinson Capital Management, LLC	332,674	$3.39M	1.52%
Cerity Partners LLC	118,083	$1.23M	0.00%
Thompson David Blair	94,242	$978.2K	0.56%
TCP Asset Management, LLC	83,795	$869.8K	0.11%
YHB Investment Advisors, Inc.	53,055	$550.7K	0.04%
Fifth Third Bancorp	23,089	$239.7K	0.00%
Signal Advisors Wealth, LLC	22,698	$235.6K	0.02%
Nelson, Van Denburg & Campbell Wealth Management Group, LLC	17,825	$185.0K	0.01%
HBK Sorce Advisory LLC	17,569	$180.1K	0.00%
LexAurum Advisors, LLC	17,143	$177.9K	0.02%
Outlook Wealth Advisors, LLC	16,977	$176.2K	0.04%
Sanibel Captiva Trust Company, Inc.	15,000	$155.7K	0.00%
Stratos Wealth Partners, LTD.	14,476	$150.3K	0.00%
Boothbay Fund Management, LLC	13,282	$137.9K	0.00%
Smith Chas P & Associates Pa Cpas	11,800	$122.5K	0.01%
Sigma Planning Corp	10,601	$110.0K	0.00%
Focus Financial Network, Inc.	10,484	$109.5K	0.00%
Horizon Kinetics Asset Management LLC	10,369	$107.6K	0.00%
Advisory Services Network, LLC	7,443	$77.3K	0.00%
Geneos Wealth Management Inc.	3,512	$36.5K	0.00%
Huntington National Bank	–	$23.5K	0.00%
Prosperity Bancshares Inc	2,000	$20.8K	0.02%
Penserra Capital Management LLC	1,398	$14.0K	0.00%

Sold out (11)

Institutions that held Nuveen Municipal High Income Opportunity Fund at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of NMZ in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
J.W. Cole Advisors, Inc.	80,007	$815.3K
Landscape Capital Management, L.L.C.	65,058	$662.9K
Readystate Asset Management LP	58,460	$595.7K
StoneX Group Inc.	34,622	$352.8K
Marex Group plc	27,100	$276.1K
Wolverine Asset Management LLC	23,586	$240.3K
KG&L Capital Management,LLC	17,800	$181.4K
Grimes & Company, Inc.	13,767	$140.3K
Webster Bank, N. A.	1,500	$15.3K
Turning Point Benefit Group, Inc.	1,004	$10.2K
American National Bank	281	$2.86K

Not filed for Q1 2026 yet (4)

Institutions that held Nuveen Municipal High Income Opportunity Fund at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding NMZ in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Running Point Capital Advisors, LLC	116,659	$1.19M
Comerica Bank	21,189	$215.9K
Global Retirement Partners, LLC	6,779	$69.1K
Maryland Capital Advisors Inc.	427	$4.35K