Pioneer Municipal High Income Opportunities Fund
MIO
MIO was delisted on the 22nd of August, 2025.
24 hedge funds and large institutions have $63.4M invested in Pioneer Municipal High Income Opportunities Fund in 2022 Q1 according to their latest regulatory filings, with 8 funds opening new positions, 11 increasing their positions, 3 reducing their positions, and 6 closing their positions.
267% more repeat investments, than reductions
Existing positions increased: 11 | Existing positions reduced: 3
33% more first-time investments, than exits
New positions opened: 8 | Existing positions closed: 6
4% more funds holding
Funds holding: 23 → 24 (+1)
11% less capital invested
Capital invested by funds: $71.4M → $63.4M (-$8.08M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PPA
Parametric Portfolio Associates
Seattle,
Washington
|
+$3.03M |
| 2 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
+$2.21M |
| 3 |
KIM
Karpus Investment Management
Pittsford,
New York
|
+$1.91M |
| 4 |
1CP
1607 Capital Partners
Richmond,
Virginia
|
+$1.75M |
| 5 |
RCM
Robinson Capital Management
Grosse Pointe Farms,
Michigan
|
+$1.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$3.46M |
| 2 |
COLIM
City of London Investment Management
London,
United Kingdom
|
-$960K |
| 3 |
WAM
Wolverine Asset Management
Chicago,
Illinois
|
-$934K |
| 4 |
TJHA
Thomas J. Herzfeld Advisors
Miami Beach,
Florida
|
-$538K |
| 5 |
UBS Group
Zurich,
Switzerland
|
-$468K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
TJHA
26
Thomas J. Herzfeld Advisors
Miami Beach,
Florida
| – | -$538K | -29,265 | Closed |
|
27
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
| – | -$444K | -24,187 | Closed |
|
28
Nomura Holdings
Tokyo,
Japan
| – | -$328K | -17,900 | Closed |
|
|
TRCT
29
Tower Research Capital (TRC)
New York
| – | -$8K | -425 | Closed |
|
30
Royal Bank of Canada
Toronto,
Ontario, Canada
| – | -$2K | -83 | Closed |
|
MIO Hedge Fund Activity: Q1 2022 in Review
24 of the 6,341 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q1 2022, worth a combined $63.4M — down 11% from $71.4M a quarter earlier.
Buyers outnumbered sellers: 8 funds opened new MIO positions and 6 closed out — a net gain of 2 holders — while 11 added to existing stakes and 3 trimmed.
The largest buyer was Parametric Portfolio Associates, adding an estimated $3.03M. The largest seller was Morgan Stanley, cutting an estimated $3.46M.
- 24 institutional investors held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q1 2022, up from 23 in Q4 2021.
- Funds reported $63.4M of Pioneer Municipal High Income Opportunities Fund stock for Q1 2022, down 11% quarter-over-quarter.
- 8 funds opened new Pioneer Municipal High Income Opportunities Fund positions in Q1 2022 and 6 closed out, a net change of +2 holders.
- The largest Pioneer Municipal High Income Opportunities Fund buyer in Q1 2022 was Parametric Portfolio Associates, an estimated $3.03M added.
- The largest Pioneer Municipal High Income Opportunities Fund seller in Q1 2022 was Morgan Stanley, an estimated $3.46M sold.
Based on aggregated 13F filings for Q1 2022.