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MIO

Pioneer Municipal High Income Opportunities Fund
MIO

Delisted

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

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1 hedge funds and large institutions have $12.1K invested in Pioneer Municipal High Income Opportunities Fund in 2025 Q3 according to their latest regulatory filings, with 0 funds opening new positions, 0 increasing their positions, 1 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed

54.42% less ownership

Funds ownership: 54.43% → 0.01% (-54%)

97% less funds holding

Funds holding: 31 → 1 (-30)

100% less capital invested

Capital invested by funds: $108M → $12.1K (-$108M)

100% less funds holding in top 10

Funds holding in top 10: 1 → 0 (-1)

100% less first-time investments, than exits

New positions opened: 0 | Existing positions closed: 30

100% less repeat investments, than reductions

Existing positions increased: 0 | Existing positions reduced: 1

Holders
1
Holders Change
-30
Holders Change %
-96.77%
% of All Funds
0.01%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
–
Increased
–
Reduced
1
Closed
30
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

No buyers this quarter

Top Sellers

Rank Fund Capital Flow
1
SIA
Sit Investment Associates
Minnesota
-$30.3M
2
SCM
Saba Capital Management
New York
-$25.5M
3
AC
Almitas Capital
California
-$9.33M
4
RCM
Rivernorth Capital Management
Florida
-$8.88M
5
Morgan Stanley
Morgan Stanley
New York
-$6.93M
Name Holding Trade Value Shares
Change 		Change in
Stake
Osaic Holdings
1
Osaic Holdings
Arizona
$12.1K -$2.68K -233 -18%
SIA
2
Sit Investment Associates
Minnesota
– -$30.3M -2,563,916 Closed
SCM
3
Saba Capital Management
New York
– -$25.5M -2,161,352 Closed
AC
4
Almitas Capital
California
– -$9.33M -790,809 Closed
RCM
5
Rivernorth Capital Management
Florida
– -$8.88M -752,523 Closed
Morgan Stanley
6
Morgan Stanley
New York
– -$6.93M -586,927 Closed
KIM
7
Karpus Investment Management
New York
– -$5.86M -496,367 Closed
GC
8
Guggenheim Capital
Illinois
– -$4.82M -408,896 Closed
Wells Fargo
9
Wells Fargo
California
– -$4.14M -351,191 Closed
HWAM
10
Hennion & Walsh Asset Management
New Jersey
– -$2.98M -252,242 Closed
Pathstone Holdings
11
Pathstone Holdings
New Jersey
– -$1.62M -137,168 Closed
UBS Group
12
UBS Group
Switzerland
– -$1.24M -105,194 Closed
Royal Bank of Canada
13
Royal Bank of Canada
Ontario, Canada
– -$1.22M -103,000 Closed
VanEck Associates
14
VanEck Associates
New York
– -$953K -80,738 Closed
BI
15
Bulldog Investors
New Jersey
– -$948K -80,353 Closed
AIA
16
Absolute Investment Advisers
Florida
– -$698K -59,120 Closed
Invesco
17
Invesco
Georgia
– -$684K -57,959 Closed
Kovitz Investment Group Partners
18
Kovitz Investment Group Partners
Illinois
– -$479K -40,562 Closed
BBPWM
19
Blue Bell Private Wealth Management
Pennsylvania
– -$278K -23,544 Closed
QL
20
Quarry LP
New York
– -$244K -20,654 Closed
Bank of New York Mellon
21
Bank of New York Mellon
New York
– -$219K -18,550 Closed
AAM
22
Auxier Asset Management
Oregon
– -$203K -17,208 Closed
MWM
23
Melfa Wealth Management
Massachusetts
– -$199K -16,850 Closed
Raymond James Financial
24
Raymond James Financial
Florida
– -$126K -10,665 Closed
S
25
SignatureFD
Georgia
– -$122K -10,314 Closed
1
2

MIO Hedge Fund Activity: Q3 2025 in Review

1 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q3 2025, worth a combined $12.1K — down 100% from $108M a quarter earlier.

Sellers outnumbered buyers: 30 funds closed out of MIO and 0 opened new positions — a net loss of 30 holders — while 1 trimmed existing stakes and 0 added.

The largest seller was Sit Investment Associates, exiting entirely with an estimated $30.3M sold.

  • 1 institutional investor held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q3 2025, down from 31 in Q2 2025.
  • Funds reported $12.1K of Pioneer Municipal High Income Opportunities Fund stock for Q3 2025, down 100% quarter-over-quarter.
  • 0 funds opened new Pioneer Municipal High Income Opportunities Fund positions in Q3 2025 and 30 closed out, a net change of -30 holders.
  • The largest Pioneer Municipal High Income Opportunities Fund seller in Q3 2025 was Sit Investment Associates, an estimated $30.3M sold.

Based on aggregated 13F filings for Q3 2025.