Nuveen Municipal High Income Opportunity Fund
124 hedge funds and large institutions have $185M invested in Nuveen Municipal High Income Opportunity Fund in 2025 Q3 according to their latest regulatory filings, with 13 funds opening new positions, 47 increasing their positions, 33 reducing their positions, and 16 closing their positions.
42% more repeat investments, than reductions
Existing positions increased: 47 | Existing positions reduced: 33
4% more capital invested
Capital invested by funds: $178M → $185M (+$6.66M)
0.68% more ownership
Funds ownership: 15.55% → 16.23% (+0.68%)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
2% less funds holding
Funds holding: 127 → 124 (-3)
19% less first-time investments, than exits
New positions opened: 13 | Existing positions closed: 16
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GP
Gridiron Partners
Wexford,
Pennsylvania
|
+$12.4M |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$1.88M |
| 3 |
Northwestern Mutual Wealth Management
Milwaukee,
Wisconsin
|
+$1.74M |
| 4 |
LPL Financial
San Diego,
California
|
+$1.35M |
| 5 |
GC
Guggenheim Capital
Chicago,
Illinois
|
+$1.05M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$1.96M |
| 2 |
SI
Stephens Inc
Little Rock,
Arkansas
|
-$1.01M |
| 3 |
WANY
Wealthspire Advisors (New York)
New York
|
-$824K |
| 4 |
IAS
Insigneo Advisory Services
Miami,
Florida
|
-$537K |
| 5 |
T
Transce3nd
Kyle,
Texas
|
-$479K |
NMZ Hedge Fund Activity: Q3 2025 in Review
124 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Nuveen Municipal High Income Opportunity Fund (NMZ) for Q3 2025, worth a combined $185M — up 3.7% from $178M a quarter earlier.
Sellers outnumbered buyers: 16 funds closed out of NMZ and 13 opened new positions — a net loss of 3 holders — while 33 trimmed existing stakes and 47 added.
The largest buyer was Gridiron Partners, adding an estimated $12.4M. The largest seller was Morgan Stanley, cutting an estimated $1.96M.
- 124 institutional investors held Nuveen Municipal High Income Opportunity Fund (NMZ) as of Q3 2025, down from 127 in Q2 2025.
- Funds reported $185M of Nuveen Municipal High Income Opportunity Fund stock for Q3 2025, up 3.7% quarter-over-quarter.
- 13 funds opened new Nuveen Municipal High Income Opportunity Fund positions in Q3 2025 and 16 closed out, a net change of -3 holders.
- The largest Nuveen Municipal High Income Opportunity Fund buyer in Q3 2025 was Gridiron Partners, an estimated $12.4M added.
- The largest Nuveen Municipal High Income Opportunity Fund seller in Q3 2025 was Morgan Stanley, an estimated $1.96M sold.
Based on aggregated 13F filings for Q3 2025.