Pioneer Municipal High Income Opportunities Fund
MIO
MIO was delisted on the 22nd of August, 2025.
26 hedge funds and large institutions have $57.4M invested in Pioneer Municipal High Income Opportunities Fund in 2022 Q2 according to their latest regulatory filings, with 3 funds opening new positions, 13 increasing their positions, 6 reducing their positions, and 0 closing their positions.
117% more repeat investments, than reductions
Existing positions increased: 13 | Existing positions reduced: 6
28.05% more ownership
Funds ownership: 0% → 28.05% (+28%)
8% more funds holding
Funds holding: 24 → 26 (+2)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
9% less capital invested
Capital invested by funds: $63.4M → $57.4M (-$5.97M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
+$7.02M |
| 2 |
SIA
Sit Investment Associates
Minneapolis,
Minnesota
|
+$2.09M |
| 3 |
MC
Matisse Capital
Portland,
Oregon
|
+$1.24M |
| 4 |
PNC Financial Services Group
Pittsburgh,
Pennsylvania
|
+$691K |
| 5 |
MIG
Mariner Investment Group
Harrison,
New York
|
+$417K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
-$2.01M |
| 2 |
Wells Fargo
San Francisco,
California
|
-$1.4M |
| 3 |
VanEck Associates
New York
|
-$136K |
| 4 |
First Trust Advisors
Wheaton,
Illinois
|
-$99.2K |
| 5 |
H6H
Hightower 6M Holding
Wichita,
Kansas
|
-$33.4K |
MIO Hedge Fund Activity: Q2 2022 in Review
26 of the 5,937 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q2 2022, worth a combined $57.4M — down 9.4% from $63.4M a quarter earlier.
Buyers outnumbered sellers: 3 funds opened new MIO positions and 0 closed out — a net gain of 3 holders — while 13 added to existing stakes and 6 trimmed.
The largest buyer was Morgan Stanley, adding an estimated $7.02M. The largest seller was Rivernorth Capital Management, cutting an estimated $2.01M.
- 26 institutional investors held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q2 2022, up from 24 in Q1 2022.
- Funds reported $57.4M of Pioneer Municipal High Income Opportunities Fund stock for Q2 2022, down 9.4% quarter-over-quarter.
- 3 funds opened new Pioneer Municipal High Income Opportunities Fund positions in Q2 2022 and 0 closed out, a net change of +3 holders.
- The largest Pioneer Municipal High Income Opportunities Fund buyer in Q2 2022 was Morgan Stanley, an estimated $7.02M added.
- The largest Pioneer Municipal High Income Opportunities Fund seller in Q2 2022 was Rivernorth Capital Management, an estimated $2.01M sold.
Based on aggregated 13F filings for Q2 2022.