Pioneer Municipal High Income Opportunities Fund
MIO
MIO was delisted on the 22nd of August, 2025.
25 hedge funds and large institutions have $49.5M invested in Pioneer Municipal High Income Opportunities Fund in 2022 Q3 according to their latest regulatory filings, with 1 funds opening new positions, 11 increasing their positions, 7 reducing their positions, and 2 closing their positions.
57% more repeat investments, than reductions
Existing positions increased: 11 | Existing positions reduced: 7
0.88% more ownership
Funds ownership: 28.05% → 28.93% (+0.88%)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
4% less funds holding
Funds holding: 26 → 25 (-1)
14% less capital invested
Capital invested by funds: $57.4M → $49.5M (-$7.84M)
50% less first-time investments, than exits
New positions opened: 1 | Existing positions closed: 2
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SIA
Sit Investment Associates
Minneapolis,
Minnesota
|
+$3.03M |
| 2 |
Wells Fargo
San Francisco,
California
|
+$1.21M |
| 3 |
UBS Group
Zurich,
Switzerland
|
+$728K |
| 4 |
Morgan Stanley
New York
|
+$427K |
| 5 |
MIG
Mariner Investment Group
Harrison,
New York
|
+$328K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
-$2.39M |
| 2 |
RCM
Robinson Capital Management
Grosse Pointe Farms,
Michigan
|
-$687K |
| 3 |
ACA
Ackerman Capital Advisors
Dallas,
Texas
|
-$409K |
| 4 |
BI
Bulldog Investors
Saddle Brook,
New Jersey
|
-$320K |
| 5 |
KIM
Karpus Investment Management
Pittsford,
New York
|
-$293K |
MIO Hedge Fund Activity: Q3 2022 in Review
25 of the 5,806 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q3 2022, worth a combined $49.5M — down 14% from $57.4M a quarter earlier.
Sellers outnumbered buyers: 2 funds closed out of MIO and 1 opened new positions — a net loss of 1 holder — while 7 trimmed existing stakes and 11 added.
The largest buyer was Sit Investment Associates, adding an estimated $3.03M. The largest seller was Rivernorth Capital Management, cutting an estimated $2.39M.
- 25 institutional investors held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q3 2022, down from 26 in Q2 2022.
- Funds reported $49.5M of Pioneer Municipal High Income Opportunities Fund stock for Q3 2022, down 14% quarter-over-quarter.
- 1 fund opened new Pioneer Municipal High Income Opportunities Fund positions in Q3 2022 and 2 closed out, a net change of -1 holder.
- The largest Pioneer Municipal High Income Opportunities Fund buyer in Q3 2022 was Sit Investment Associates, an estimated $3.03M added.
- The largest Pioneer Municipal High Income Opportunities Fund seller in Q3 2022 was Rivernorth Capital Management, an estimated $2.39M sold.
Based on aggregated 13F filings for Q3 2022.