Pioneer Municipal High Income Opportunities Fund (MIO) Institutional Ownership $11.38 +0.04 (+0.31%) Closing price 08/22/2025Extended Trading$11.38 0.00 (0.00%) As of 08/22/2025 05:23 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Share Share Ownership Stock AnalysisChartDividendHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Pioneer Municipal High Income Opportunities Fund (NYSE:MIO)Number ofInstitutional Buyers(last 12 months)20TotalInstitutional Inflows(last 12 months)$27.09MNumber ofInstitutional Sellers(last 12 months)11TotalInstitutional Outflows(last 12 months)$1.16M Get MIO Insider Trade Alerts Want to know when executives and insiders are buying or selling Pioneer Municipal High Income Opportunities Fund stock? 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Skip Chart & View Institutional Buying and Selling Data MIO Institutional Buying and Selling by Quarter Pioneer Municipal High Income Opportunities Fund Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/14/2025 Raymond James Financial Inc.10,665$126K0.0%-20.1%0.000% 8/14/2025 Karpus Management Inc.496,367$5.86M0.2%N/A0.000% 8/13/2025 Guggenheim Capital LLC408,896$4.83M0.0%-4.9%0.000% 8/13/2025 Invesco Ltd.57,959$684K0.0%-3.0%0.000% 8/13/2025 Wellspring Financial Advisors LLC10,000$118K0.0%N/A0.000% 8/4/2025 Wolverine Asset Management LLC9,520$112K0.0%N/A0.000% 7/15/2025 Absolute Investment Advisers LLC59,120$698K0.1%N/A0.000% 5/16/2025 Almitas Capital LLC214,870$2.53M0.8%-7.0%0.000% 5/14/2025 Thomas J. Herzfeld Advisors Inc.52,597$620K0.2%+22.8%0.000% 5/13/2025 Sit Investment Associates Inc.2,545,042$30.01M0.7%+0.6%0.000% Get the Latest News and Ratings for MIO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Pioneer Municipal High Income Opportunities Fund and its competitors with MarketBeat's FREE daily newsletter. 5/12/2025 Invesco Ltd.59,729$704K0.0%+1.5%0.000% 5/6/2025 Avantax Advisory Services Inc.47,320$558K0.0%+3.9%0.000% 5/5/2025 Blue Bell Private Wealth Management LLC23,139$273K0.1%-9.3%0.000% 5/5/2025 Fountainhead AM LLC10,340$122K0.0%-64.3%0.000% 4/15/2025Noble Wealth Management PBC35,783$422K0.3%+32.9%0.000% 4/10/2025 Hennion & Walsh Asset Management Inc.133,165$1.57M0.1%N/A0.000% 2/17/2025 Saba Capital Management L.P.2,079,938$24.67M0.6%+13.5%0.000% 2/17/2025 Pathstone Holdings LLC633,375$7.51M0.0%-0.7%0.000% 2/17/2025 Almitas Capital LLC231,057$2.74M0.6%+125.2%0.000% 2/13/2025 Guggenheim Capital LLC437,397$5.19M0.0%+2.0%0.000% 2/13/2025 Raymond James Financial Inc.14,056$167K0.0%N/A0.000% 2/13/2025 Sit Investment Associates Inc.2,530,477$30.01M0.7%+8.8%0.000% 2/13/2025 Wells Fargo & Company MN390,748$4.63M0.0%-1.2%0.000% 2/12/2025 Thomas J. Herzfeld Advisors Inc.42,844$508K0.2%+14.8%0.000% 2/10/2025 Atala Financial Inc32,041$380K0.3%N/A0.000% 2/10/2025 Avantax Advisory Services Inc.45,538$540K0.0%+54.3%0.000% 2/7/2025 Independent Advisor Alliance14,515$172K0.0%N/A0.000% 2/6/2025 Raymond James Financial Inc.14,056$167K0.0%N/A0.000% 2/5/2025Noble Wealth Management PBC26,915$319K0.2%N/A0.000% 1/29/2025 Van ECK Associates Corp121,916$1.45M0.0%+1.9%0.000% 1/24/2025 Catalina Capital Group LLC18,491$219K0.1%N/A0.000% 1/17/2025 Avior Wealth Management LLC7,583$90K0.0%-13.6%0.000% 12/3/2024 Rivernorth Capital Management LLC1,132,947$14.05M0.7%+49.9%0.000% 11/25/2024Sanctuary Advisors LLC34,261$413K0.0%-2.5%0.000% 11/15/2024 Rivernorth Capital Management LLC1,118,669$13.87M0.7%+48.0%0.000% 11/7/2024 Pathstone Holdings LLC637,759$7.91M0.0%-3.1%0.000% 10/29/2024 Van ECK Associates Corp119,637$1.45M0.0%-2.4%0.000% 9/5/2024Sanctuary Advisors LLC35,122$388K0.0%N/A0.000% 8/14/2024 Whitebox Advisors LLC114,612$1.34M0.0%+157.0%0.000% 8/9/2024 City of London Investment Management Co. Ltd.113,993$1.33M0.1%-71.0%0.000% $100 Trillion “AI Metal” Found in American Ghost Town (Ad)Jeff Brown recently traveled to a ghost town in the middle of an American desert… To investigate what could be the biggest technology story of this decade. In short, he believes what he's holding in his hand is the key to the $100 trillion AI boom… And only one company here in the U.S. can mine this obscure metal.Click here to get the details on this virtual monopoly.8/5/2024 Blue Bell Private Wealth Management LLC24,065$280K0.1%+82.9%0.000% 7/31/2024 Van ECK Associates Corp122,518$1.43M0.0%-8.2%0.000% 7/30/2024 WMG Financial Advisors LLC10,047$117K0.1%N/A0.000% 7/26/2024 Bank of New York Mellon Corp15,318$178K0.0%-67.8%0.000% 5/16/2024 Prudent Investors Network Inc.10,337$117K0.0%N/A0.000% 5/15/2024 Whitebox Advisors LLC44,590$504K0.0%N/A0.000% 5/14/2024 Robinson Capital Management LLC132,742$1.46M0.5%-21.2%0.000% 5/10/2024 City of London Investment Management Co. Ltd.392,511$4.44M0.4%-13.4%0.000% 5/1/2024 Matisse Capital21,414$242K0.1%-82.4%0.000% 4/30/2024 Fountainhead AM LLC28,292$320K0.1%-6.0%0.000% 4/24/2024 Blue Bell Private Wealth Management LLC13,159$149K0.0%+1,362.1%0.000% 4/15/2024 Kingswood Wealth Advisors LLC27,835$315K0.0%+62.0%0.000% 3/27/2024 Nomura Holdings Inc.21,250$225K0.0%N/A0.000% (Data available from 1/1/2016 forward) MIO Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of MIO shares? During the previous two years, 34 institutional investors and hedge funds held shares of Pioneer Municipal High Income Opportunities Fund. The most heavily invested institutionals were Sit Investment Associates Inc. ($30.01M), Saba Capital Management L.P. ($24.67M), Rivernorth Capital Management LLC ($14.05M), Pathstone Holdings LLC ($7.51M), Karpus Management Inc. ($5.86M), Guggenheim Capital LLC ($4.83M), and Wells Fargo & Company MN ($4.63M).Learn more on Pioneer Municipal High Income Opportunities Fund's institutional investors. Which institutional investors have been buying Pioneer Municipal High Income Opportunities Fund's stock? Of the 26 institutional investors that purchased Pioneer Municipal High Income Opportunities Fund's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Rivernorth Capital Management LLC ($740.21K), Karpus Management Inc. ($496.37K), Saba Capital Management L.P. ($247.38K), Sit Investment Associates Inc. ($220.20K), Hennion & Walsh Asset Management Inc. ($133.17K), Almitas Capital LLC ($128.46K), and Whitebox Advisors LLC ($114.61K). How much institutional buying is happening at Pioneer Municipal High Income Opportunities Fund? Institutional investors have bought a total of 2,253,364 shares in the last 24 months. This purchase volume represents approximately $27.09M in transactions. Which of Pioneer Municipal High Income Opportunities Fund's major shareholders have been selling company stock? Of the 11 institutional investors that sold Pioneer Municipal High Income Opportunities Fund's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Pathstone Holdings LLC ($24.96K), Guggenheim Capital LLC ($21.05K), Fountainhead AM LLC ($18.64K), Almitas Capital LLC ($16.19K), Wells Fargo & Company MN ($4.77K), Van ECK Associates Corp ($2.88K), and Raymond James Financial Inc. ($2.69K). How much institutional selling is happening at Pioneer Municipal High Income Opportunities Fund? Institutional investors have sold a total of 97,371 shares in the last 24 months. This volume of shares sold represents approximately $1.16M in transactions. 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