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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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.

New
Increased
Maintained
Reduced
Closed
Holders
24
Holders Change
+1
Holders Change %
+4.35%
% of All Funds
0.38%
Holding in Top 10
1
Holding in Top 10 Change
+1
Holding in Top 10 Change %
%
% of All Funds
0.02%
New
8
Increased
11
Reduced
3
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
PPA
Parametric Portfolio Associates
Washington
+$2.76M
2
RCM
Rivernorth Capital Management
Florida
+$2.02M
3
KIM
Karpus Investment Management
New York
+$1.74M
4
1CP
1607 Capital Partners
Virginia
+$1.6M
5
RCM
Robinson Capital Management
Michigan
+$997K

Top Sellers

1
Morgan Stanley
Morgan Stanley
New York
-$3.16M
2
WAM
Wolverine Asset Management
Illinois
-$934K
3
COLIM
City of London Investment Management
United Kingdom
-$867K
4
TJHA
Thomas J. Herzfeld Advisors
Florida
-$538K
5
Susquehanna International Group
Susquehanna International Group
Pennsylvania
-$444K
Name Holding Trade Value Shares
Change 		Shares
Change %
TJHA
26
Thomas J. Herzfeld Advisors
Florida
– -$538K -29,265 Closed
Susquehanna International Group
27
Susquehanna International Group
Pennsylvania
– -$444K -24,187 Closed
Nomura Holdings
28
Nomura Holdings
Japan
– -$328K -17,900 Closed
TRCT
29
Tower Research Capital (TRC)
New York
– -$8K -425 Closed
Royal Bank of Canada
30
Royal Bank of Canada
Ontario, Canada
– -$2K -83 Closed
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