MIO

Pioneer Municipal High Income Opportunities Fund
MIO

Overview Fund Activity
Delisted

MIO was delisted on the 22nd of August, 2025.

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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.

New
Increased
Maintained
Reduced
Closed
Holders
25
Holders Change
-1
Holders Change %
-3.85%
% of All Funds
0.43%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.02%
New
1
Increased
11
Reduced
7
Closed
2
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
SIA
Sit Investment Associates
Minnesota
+$2.54M
2
Wells Fargo
Wells Fargo
California
+$1.02M
3
UBS Group
UBS Group
Switzerland
+$611K
4
Morgan Stanley
Morgan Stanley
New York
+$358K
5
MIG
Mariner Investment Group
New York
+$275K

Top Sellers

1
RCM
Rivernorth Capital Management
Florida
-$2M
2
RCM
Robinson Capital Management
Michigan
-$586K
3
ACA
Ackerman Capital Advisors
Texas
-$409K
4
BI
Bulldog Investors
New Jersey
-$320K
5
KIM
Karpus Investment Management
New York
-$246K
Name Holding Trade Value Shares
Change 		Shares
Change %
ACA
26
Ackerman Capital Advisors
Texas
– -$409K -33,741 Closed
BI
27
Bulldog Investors
New Jersey
– -$320K -26,406 Closed
1
2