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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31 hedge funds and large institutions have $108M invested in Pioneer Municipal High Income Opportunities Fund in 2025 Q2 according to their latest regulatory filings, with 9 funds opening new positions, 10 increasing their positions, 9 reducing their positions, and 9 closing their positions.

Holders
31
Holders Change
-3
Holders Change %
-8.82%
% of All Funds
0.42%
Holding in Top 10
1
Holding in Top 10 Change
+1
Holding in Top 10 Change %
%
% of All Funds
0.01%
New
9
Increased
10
Reduced
9
Closed
9
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
AC
1
Almitas Capital
California
$9.33M
2
KIM
2
Karpus Investment Management
New York
$5.86M
3
HWAM
3
Hennion & Walsh Asset Management
New Jersey
$2.98M
4
BI
4
Bulldog Investors
New Jersey
$948K
5
UBS Group
5
UBS Group
Switzerland
$1.24M

Top Sellers

1
RCM
1
Rivernorth Capital Management
Florida
$8.88M
2
Pathstone Holdings
2
Pathstone Holdings
New Jersey
$1.62M
3
Morgan Stanley
3
Morgan Stanley
New York
$6.93M
4
Verition Fund Management
4
Verition Fund Management
Connecticut
$0
5
TJHA
5
Thomas J. Herzfeld Advisors
Florida
$0
Name Market Value Shares Shares
Change 		Shares
Change %
SIA
1
Sit Investment Associates
Minnesota
$30.3M 2,563,916 +18,874 +0.7%
SCM
2
Saba Capital Management
New York
$25.5M 2,161,352 +47,715 +2%
AC
3
Almitas Capital
California
$9.33M 790,809 +575,939 +268%
RCM
4
Rivernorth Capital Management
Florida
$8.88M 752,523 -823,328 -52%
Morgan Stanley
5
Morgan Stanley
New York
$6.93M 586,927 -107,555 -15%
KIM
6
Karpus Investment Management
New York
$5.86M 496,367 +496,367 New
GC
7
Guggenheim Capital
Illinois
$4.82M 408,896 -21,049 -5%
Wells Fargo
8
Wells Fargo
California
$4.14M 351,191 +4,759 +1%
HWAM
9
Hennion & Walsh Asset Management
New Jersey
$2.98M 252,242 +119,077 +89%
Pathstone Holdings
10
Pathstone Holdings
New Jersey
$1.62M 137,168 -405,148 -75%
UBS Group
11
UBS Group
Switzerland
$1.24M 105,194 +65,493 +165%
Royal Bank of Canada
12
Royal Bank of Canada
Ontario, Canada
$1.22M 103,000 +20,000 +24%
VanEck Associates
13
VanEck Associates
New York
$953K 80,738 +276 +0.3%
BI
14
Bulldog Investors
New Jersey
$948K 80,353 +80,353 New
AIA
15
Absolute Investment Advisers
Florida
$698K 59,120 +59,120 New
Invesco
16
Invesco
Georgia
$684K 57,959 -1,770 -3%
Kovitz Investment Group Partners
17
Kovitz Investment Group Partners
Illinois
$479K 40,562 +40,562 New
BBPWM
18
Blue Bell Private Wealth Management
Pennsylvania
$278K 23,544 +405 +2%
QL
19
Quarry LP
New York
$244K 20,654 +20,654 New
Bank of New York Mellon
20
Bank of New York Mellon
New York
$219K 18,550 -16,881 -48%
AAM
21
Auxier Asset Management
Oregon
$203K 17,208 – –
MWM
22
Melfa Wealth Management
Massachusetts
$199K 16,850 – –
Raymond James Financial
23
Raymond James Financial
Florida
$126K 10,665 -2,690 -20%
S
24
SignatureFD
Georgia
$122K 10,314 +129 +1%
WFA
25
Wellspring Financial Advisors
Ohio
$118K 10,000 +10,000 New
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