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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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7 hedge funds and large institutions have $22.8M invested in Pioneer Municipal High Income Opportunities Fund in 2021 Q3 according to their latest regulatory filings, with 7 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
7
Holders Change
+7
Holders Change %
–
% of All Funds
0.12%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
7
Increased
–
Reduced
–
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
RCM
Rivernorth Capital Management
Florida
+$7.06M
2
Morgan Stanley
Morgan Stanley
New York
+$6.93M
3
Wells Fargo
Wells Fargo
California
+$5.17M
4
VanEck Associates
VanEck Associates
New York
+$1.63M
5
UBS Group
UBS Group
Switzerland
+$1.04M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change 		Change in
Stake
RCM
1
Rivernorth Capital Management
Florida
$7.16M +$7.06M +351,289 New
Morgan Stanley
2
Morgan Stanley
New York
$7.03M +$6.93M +344,964 New
Wells Fargo
3
Wells Fargo
California
$5.24M +$5.17M +257,000 New
VanEck Associates
4
VanEck Associates
New York
$1.65M +$1.63M +80,968 New
UBS Group
5
UBS Group
Switzerland
$1.06M +$1.04M +51,788 New
Millennium Management
6
Millennium Management
New York
$642K +$633K +31,502 New
S
7
SignatureFD
Georgia
$61K +$60.3K +3,000 New

MIO Hedge Fund Activity: Q3 2021 in Review

7 of the 5,713 institutional investors tracked by Wall St. Rank reported a position in Pioneer Municipal High Income Opportunities Fund (MIO) for Q3 2021, worth a combined $22.8M.

Buyers outnumbered sellers: 7 funds opened new MIO positions and 0 closed out — a net gain of 7 holders — while 0 added to existing stakes and 0 trimmed.

The largest buyer was Rivernorth Capital Management, opening a new position worth an estimated $7.06M.

  • 7 institutional investors held Pioneer Municipal High Income Opportunities Fund (MIO) as of Q3 2021, up from 0 in Q2 2021.
  • Funds reported $22.8M of Pioneer Municipal High Income Opportunities Fund stock for Q3 2021.
  • 7 funds opened new Pioneer Municipal High Income Opportunities Fund positions in Q3 2021 and 0 closed out, a net change of +7 holders.
  • The largest Pioneer Municipal High Income Opportunities Fund buyer in Q3 2021 was Rivernorth Capital Management, an estimated $7.06M added.

Based on aggregated 13F filings for Q3 2021.