Pioneer Municipal High Income Opportunities Fund
MIO
MIO was delisted on the 22nd of August, 2025.
26 hedge funds and large institutions have $60.4M invested in Pioneer Municipal High Income Opportunities Fund in 2022 Q4 according to their latest regulatory filings, with 7 funds opening new positions, 11 increasing their positions, 6 reducing their positions, and 5 closing their positions.
83% more repeat investments, than reductions
Existing positions increased: 11 | Existing positions reduced: 6
40% more first-time investments, than exits
New positions opened: 7 | Existing positions closed: 5
22% more capital invested
Capital invested by funds: $49.5M → $60.4M (+$10.9M)
4.66% more ownership
Funds ownership: 28.93% → 33.58% (+4.7%)
4% more funds holding
Funds holding: 25 → 26 (+1)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SCM
Saba Capital Management
New York
|
+$8.81M |
| 2 |
Morgan Stanley
New York
|
+$2.85M |
| 3 |
WP
Woodline Partners
San Francisco,
California
|
+$1.57M |
| 4 |
Wells Fargo
San Francisco,
California
|
+$946K |
| 5 |
MC
Moors & Cabot
Boston,
Massachusetts
|
+$546K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RCM
Rivernorth Capital Management
West Palm Beach,
Florida
|
-$6M |
| 2 |
KIM
Karpus Investment Management
Pittsford,
New York
|
-$2.7M |
| 3 |
SIA
Sit Investment Associates
Minneapolis,
Minnesota
|
-$2.48M |
| 4 |
RCM
Robinson Capital Management
Grosse Pointe Farms,
Michigan
|
-$1.18M |
| 5 |
COLIM
City of London Investment Management
London,
United Kingdom
|
-$652K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
26
Bessemer Group
Woodbridge,
New Jersey
| $4K | +$437 | +42 | +11% |
|
|
RCM
27
Rivernorth Capital Management
West Palm Beach,
Florida
| – | -$6M | -591,566 | Closed |
|
|
KIM
28
Karpus Investment Management
Pittsford,
New York
| – | -$2.7M | -266,483 | Closed |
|
|
RCM
29
Robinson Capital Management
Grosse Pointe Farms,
Michigan
| – | -$1.18M | -114,369 | Closed |
|
30
PNC Financial Services Group
Pittsburgh,
Pennsylvania
| – | -$558K | -55,000 | Closed |
|
31
First Trust Advisors
Wheaton,
Illinois
| – | -$119K | -11,768 | Closed |
|
MIO Hedge Fund Activity: Q4 2022 in Review
26 of the 6,222 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q4 2022, worth a combined $60.4M — up 22% from $49.5M a quarter earlier.
Buyers outnumbered sellers: 7 funds opened new MIO positions and 5 closed out — a net gain of 2 holders — while 11 added to existing stakes and 6 trimmed.
The largest buyer was Saba Capital Management, adding an estimated $8.81M. The largest seller was Rivernorth Capital Management, exiting entirely with an estimated $6M sold.
- 26 institutional investors held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q4 2022, up from 25 in Q3 2022.
- Funds reported $60.4M of Pioneer Municipal High Income Opportunities Fund stock for Q4 2022, up 22% quarter-over-quarter.
- 7 funds opened new Pioneer Municipal High Income Opportunities Fund positions in Q4 2022 and 5 closed out, a net change of +2 holders.
- The largest Pioneer Municipal High Income Opportunities Fund buyer in Q4 2022 was Saba Capital Management, an estimated $8.81M added.
- The largest Pioneer Municipal High Income Opportunities Fund seller in Q4 2022 was Rivernorth Capital Management, an estimated $6M sold.
Based on aggregated 13F filings for Q4 2022.