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Nuveen Municipal High Income Opportunity Fund
NMZ

137 hedge funds and large institutions have $208M invested in Nuveen Municipal High Income Opportunity Fund in 2026 Q1 according to their latest regulatory filings, with 21 funds opening new positions, 60 increasing their positions, 22 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

173% more repeat investments, than reductions

Existing positions increased: 60 | Existing positions reduced: 22

91% more first-time investments, than exits

New positions opened: 21 | Existing positions closed: 11

8% more capital invested

Capital invested by funds: $193M → $208M (+$15.4M)

5% more funds holding

Funds holding: 131 → 137 (+6)

0.99% more ownership

Funds ownership: 16.45% → 17.45% (+0.99%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

Holders
137
Holders Change
+6
Holders Change %
+4.58%
% of All Funds
1.69%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
21
Increased
60
Reduced
22
Closed
11
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
HWAM
Hennion & Walsh Asset Management
New Jersey
+$5.21M
2
RCM
Robinson Capital Management
Michigan
+$3.48M
3
GC
Guggenheim Capital
Illinois
+$2.37M
4
Cerity Partners
Cerity Partners
New York
+$1.23M
5
Northwestern Mutual Wealth Management
Northwestern Mutual Wealth Management
Wisconsin
+$1.05M

Top Sellers

Rank Fund Capital Flow
1
Jane Street
Jane Street
New York
-$2.28M
2
GP
Gridiron Partners
Pennsylvania
-$1.2M
3
UBS Group
UBS Group
Switzerland
-$1.16M
4
JWCA
J.W. Cole Advisors
Florida
-$815K
5
LCM
Landscape Capital Management
New Jersey
-$663K
Name Holding Trade Value Shares
Change 		Change in
Stake
RIG
101
Ramiah Investment Group
Wisconsin
$114K +$6.03K +577 +6%
PWP
102
Principle Wealth Partners
Connecticut
$114K – – –
MFG
103
Merit Financial Group
Georgia
$111K -$12K -1,146 -10%
SPC
104
Sigma Planning Corp
Michigan
$110K +$111K +10,601 New
FFN
105
Focus Financial Network
Minnesota
$110K +$110K +10,484 New
SCM
106
Sage Capital Management
New Jersey
$109K – – –
HKAM
107
Horizon Kinetics Asset Management
New York
$108K +$108K +10,369 New
SCA
108
Snowden Capital Advisors
New York
$107K – – –
VHAM
109
Van Hulzen Asset Management
California
$107K – – –
GAFA
110
Garton & Associates Financial Advisors
Kentucky
$107K +$14.6K +1,400 +16%
IFG
111
Independent Financial Group
California
$104K +$658 +63 +0.6%
CCG
112
Ceeto Capital Group
Florida
$104K – – –
IA
113
Intellus Advisors
Florida
$104K – – –
BA
114
Blueline Advisors
New Hampshire
$96.7K -$20.5K -1,964 -17%
MCM
115
MAI Capital Management
Ohio
$92.8K – – –
AF
116
Allworth Financial
California
$88.2K +$26.1K +2,500 +42%
ASN
117
Advisory Services Network
Georgia
$77.3K +$77.8K +7,443 New
NEWAS
118
N.E.W. Advisory Services
Wisconsin
$62.3K – – –
AAP
119
Arax Advisory Partners
Colorado
$40.8K -$285K -27,284 -87%
FFA
120
Farther Finance Advisors
California
$38.5K +$73 +7 +0.2%
GWM
121
Geneos Wealth Management
Colorado
$36.5K +$36.7K +3,512 New
AGA
122
Arkos Global Advisors
Texas
$32K -$138K -13,200 -81%
US Bancorp
123
US Bancorp
Minnesota
$31.1K – – –
HNB
124
Huntington National Bank
Ohio
$23.5K – – –
HWP
125
Highline Wealth Partners
California
$20.8K – – –
2 3 4
5
6

NMZ Hedge Fund Activity: Q1 2026 in Review

137 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Nuveen Municipal High Income Opportunity Fund (NMZ) for Q1 2026, worth a combined $208M — up 8% from $193M a quarter earlier.

Buyers outnumbered sellers: 21 funds opened new NMZ positions and 11 closed out — a net gain of 10 holders — while 60 added to existing stakes and 22 trimmed.

The largest buyer was Hennion & Walsh Asset Management, adding an estimated $5.21M. The largest seller was Jane Street, cutting an estimated $2.28M.

  • 137 institutional investors held Nuveen Municipal High Income Opportunity Fund (NMZ) as of Q1 2026, up from 131 in Q4 2025.
  • Funds reported $208M of Nuveen Municipal High Income Opportunity Fund stock for Q1 2026, up 8% quarter-over-quarter.
  • 21 funds opened new Nuveen Municipal High Income Opportunity Fund positions in Q1 2026 and 11 closed out, a net change of +10 holders.
  • The largest Nuveen Municipal High Income Opportunity Fund buyer in Q1 2026 was Hennion & Walsh Asset Management, an estimated $5.21M added.
  • The largest Nuveen Municipal High Income Opportunity Fund seller in Q1 2026 was Jane Street, an estimated $2.28M sold.

Based on aggregated 13F filings for Q1 2026.