Pioneer Municipal High Income Opportunities Fund
MIO
MIO was delisted on the 22nd of August, 2025.
29 hedge funds and large institutions have $103M invested in Pioneer Municipal High Income Opportunities Fund in 2024 Q3 according to their latest regulatory filings, with 5 funds opening new positions, 12 increasing their positions, 8 reducing their positions, and 8 closing their positions.
50% more repeat investments, than reductions
Existing positions increased: 12 | Existing positions reduced: 8
4% less capital invested
Capital invested by funds: $106M → $103M (-$3.75M)
5.02% less ownership
Funds ownership: 54.08% → 49.06% (-5%)
9% less funds holding
Funds holding: 32 → 29 (-3)
38% less first-time investments, than exits
New positions opened: 5 | Existing positions closed: 8
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
+$4.57M |
| 2 |
SCM
Saba Capital Management
New York
|
+$1.14M |
| 3 |
GC
Guggenheim Capital
Chicago,
Illinois
|
+$993K |
| 4 |
Invesco
Atlanta,
Georgia
|
+$478K |
| 5 |
TJHA
Thomas J. Herzfeld Advisors
Miami Beach,
Florida
|
+$452K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AW
Atlas Wealth
Cincinnati,
Ohio
|
-$13.1M |
| 2 |
WA
Whitebox Advisors
Minneapolis,
Minnesota
|
-$1.34M |
| 3 |
COLIM
City of London Investment Management
London,
United Kingdom
|
-$1.33M |
| 4 |
Morgan Stanley
New York
|
-$603K |
| 5 |
AC
Almitas Capital
Santa Monica,
California
|
-$439K |
MIO Hedge Fund Activity: Q3 2024 in Review
29 of the 6,978 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q3 2024, worth a combined $103M — down 3.5% from $106M a quarter earlier.
Sellers outnumbered buyers: 8 funds closed out of MIO and 5 opened new positions — a net loss of 3 holders — while 8 trimmed existing stakes and 12 added.
The largest buyer was Rivernorth Capital Management, adding an estimated $4.57M. The largest seller was Atlas Wealth, exiting entirely with an estimated $13.1M sold.
- 29 institutional investors held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q3 2024, down from 32 in Q2 2024.
- Funds reported $103M of Pioneer Municipal High Income Opportunities Fund stock for Q3 2024, down 3.5% quarter-over-quarter.
- 5 funds opened new Pioneer Municipal High Income Opportunities Fund positions in Q3 2024 and 8 closed out, a net change of -3 holders.
- The largest Pioneer Municipal High Income Opportunities Fund buyer in Q3 2024 was Rivernorth Capital Management, an estimated $4.57M added.
- The largest Pioneer Municipal High Income Opportunities Fund seller in Q3 2024 was Atlas Wealth, an estimated $13.1M sold.
Based on aggregated 13F filings for Q3 2024.