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)19TotalInstitutional Inflows(last 12 months)$26.68MNumber 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% 5/16/2025Almitas Capital LLC214,870$2.53M0.8%-7.0%0.000% 5/14/2025Thomas J. Herzfeld Advisors Inc.52,597$620K0.2%+22.8%0.000% 5/13/2025Sit 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. 5/12/2025Invesco Ltd.59,729$704K0.0%+1.5%0.000% 5/6/2025Avantax Advisory Services Inc.47,320$558K0.0%+3.9%0.000% 5/5/2025Blue Bell Private Wealth Management LLC23,139$273K0.1%-9.3%0.000% 5/5/2025Fountainhead AM LLC10,340$122K0.0%-64.3%0.000% 4/15/2025Noble Wealth Management PBC35,783$422K0.3%+32.9%0.000% 4/10/2025Hennion & Walsh Asset Management Inc.133,165$1.57M0.1%N/A0.000% 2/17/2025Saba Capital Management L.P.2,079,938$24.67M0.6%+13.5%0.000% 2/17/2025Pathstone Holdings LLC633,375$7.51M0.0%-0.7%0.000% 2/17/2025Almitas Capital LLC231,057$2.74M0.6%+125.2%0.000% 2/13/2025Guggenheim Capital LLC437,397$5.19M0.0%+2.0%0.000% 2/13/2025Raymond James Financial Inc.14,056$167K0.0%N/A0.000% 2/13/2025Sit Investment Associates Inc.2,530,477$30.01M0.7%+8.8%0.000% 2/13/2025Wells Fargo & Company MN390,748$4.63M0.0%-1.2%0.000% 2/12/2025Thomas J. Herzfeld Advisors Inc.42,844$508K0.2%+14.8%0.000% 2/10/2025Atala Financial Inc32,041$380K0.3%N/A0.000% 2/10/2025Avantax Advisory Services Inc.45,538$540K0.0%+54.3%0.000% 2/7/2025Independent Advisor Alliance14,515$172K0.0%N/A0.000% 2/6/2025Raymond James Financial Inc.14,056$167K0.0%N/A0.000% 2/5/2025Noble Wealth Management PBC26,915$319K0.2%N/A0.000% 1/29/2025Van ECK Associates Corp121,916$1.45M0.0%+1.9%0.000% 1/24/2025Catalina Capital Group LLC18,491$219K0.1%N/A0.000% 1/17/2025Avior Wealth Management LLC7,583$90K0.0%-13.6%0.000% 12/3/2024Rivernorth Capital Management LLC1,132,947$14.05M0.7%+49.9%0.000% 11/25/2024Sanctuary Advisors LLC34,261$413K0.0%-2.5%0.000% 11/15/2024Rivernorth Capital Management LLC1,118,669$13.87M0.7%+48.0%0.000% 11/7/2024Pathstone Holdings LLC637,759$7.91M0.0%-3.1%0.000% 10/29/2024Van ECK Associates Corp119,637$1.45M0.0%-2.4%0.000% 9/5/2024Sanctuary Advisors LLC35,122$388K0.0%N/A0.000% 8/14/2024Whitebox Advisors LLC114,612$1.34M0.0%+157.0%0.000% 8/9/2024City of London Investment Management Co. Ltd.113,993$1.33M0.1%-71.0%0.000% 8/5/2024Blue Bell Private Wealth Management LLC24,065$280K0.1%+82.9%0.000% 7/31/2024Van ECK Associates Corp122,518$1.43M0.0%-8.2%0.000% 7/30/2024WMG Financial Advisors LLC10,047$117K0.1%N/A0.000% 7/26/2024Bank of New York Mellon Corp15,318$178K0.0%-67.8%0.000% 5/16/2024Prudent Investors Network Inc.10,337$117K0.0%N/A0.000% 5/15/2024Whitebox Advisors LLC44,590$504K0.0%N/A0.000% 5/14/2024Robinson Capital Management LLC132,742$1.46M0.5%-21.2%0.000% 5/10/2024City of London Investment Management Co. Ltd.392,511$4.44M0.4%-13.4%0.000% 5/1/2024Matisse Capital21,414$242K0.1%-82.4%0.000% 4/30/2024Fountainhead AM LLC28,292$320K0.1%-6.0%0.000% 4/24/2024Blue Bell Private Wealth Management LLC13,159$149K0.0%+1,362.1%0.000% 4/15/2024Kingswood Wealth Advisors LLC27,835$315K0.0%+62.0%0.000% 3/27/2024Nomura 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 2,218,242 shares in the last 24 months. This purchase volume represents approximately $26.68M 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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