American Shared Hospital Services (AMS) Institutional Ownership $2.75 -0.07 (-2.48%) Closing price 04/25/2025 04:10 PM EasternExtended Trading$2.75 +0.00 (+0.04%) As of 04/25/2025 05:42 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 Compare Share Share Ownership Stock AnalysisChartEarningsHeadlinesOwnershipSEC FilingsShort InterestBuy This Stock Institutional Ownership Changes (13F Filings) for American Shared Hospital Services (NYSEAMERICAN:AMS)CurrentInstitutional OwnershipPercentage23.16%Number ofInstitutional Buyers(last 12 months)3Number ofInstitutional Sellers(last 12 months)1 Get AMS Insider Trade Alerts Want to know when executives and insiders are buying or selling American Shared Hospital Services stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. Email Address Skip Chart & View Institutional Buying and Selling Data AMS Institutional Buying and Selling by Quarter American Shared Hospital Services Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails2/13/2025Renaissance Technologies LLC71,225$227K0.0%+5.6%1.109% 8/9/2024Renaissance Technologies LLC55,501$177K0.0%+31.2%0.877% 8/9/2024Dimensional Fund Advisors LP179,637$574K0.0%+4.9%2.838% 5/10/2024Acadian Asset Management LLC86,399$254K0.0%-38.7%1.365% 5/7/2024Empowered Funds LLC10,468$31K0.0%N/A0.165% 10/11/2023 Canton Hathaway LLC20,000$49K0.0%-33.3%0.321% 8/7/2023Acadian Asset Management LLC140,864$358K0.0%-5.7%2.268% 4/11/2023 Canton Hathaway LLC30,000$84K0.0%+50.0%0.488% 1/19/2023 Canton Hathaway LLC20,000$59K0.0%+100.0%0.325% 10/17/2022 Canton Hathaway LLC10,000$26K0.0%N/A0.164% 8/2/2022Financial Counselors Inc.37,123$82K0.0%N/A0.611% 11/16/2021Squarepoint Ops LLC27,453$76K0.0%-13.9%0.468% 8/17/2021Bridgeway Capital Management LLC220,800$647K0.0%+47.0%3.806% 8/16/2021Squarepoint Ops LLC31,871$93K0.0%N/A0.549% 8/13/2021Vanguard Group Inc.104,644$307K0.0%+126.6%1.804% 8/12/2021Dimensional Fund Advisors LP220,839$647K0.0%-9.8%3.807% 8/11/2021Susquehanna Fundamental Investments LLC10,600$31K0.0%N/A0.183% 7/31/2021GWM Advisors LLC31,595$93K0.0%+46.3%0.545% 5/21/2021Citadel Advisors LLC27,220$75K0.0%+164.3%0.469% 5/18/2021Citadel Advisors LLC27,220$75K0.0%+164.3%0.469% 5/14/2021Dimensional Fund Advisors LP244,723$678K0.0%+34.9%4.219% 5/11/2021Acadian Asset Management LLC44,697$124K0.0%+28.9%0.771% 3/8/2021Dimensional Fund Advisors LP181,429$403K0.0%-12.1%3.149% 2/25/2021Dimensional Fund Advisors LP181,429$403K0.0%-12.1%3.149% (Data available from 1/1/2016 forward) AMS Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of AMS shares? During the previous two years, the following institutional investors and hedge funds held shares of American Shared Hospital Services shares: Dimensional Fund Advisors LP ($574K), Acadian Asset Management LLC ($254K), Renaissance Technologies LLC ($227K), and Canton Hathaway LLC ($49K), Empowered Funds LLC ($31K).Learn more on AMS's institutional investors. What percentage of American Shared Hospital Services stock is owned by institutional investors? 23.16% of American Shared Hospital Services stock is owned by institutional investors. Learn more on AMS's institutional investor holdings. Which institutional investors have been buying American Shared Hospital Services stock? The following institutional investors have purchased American Shared Hospital Services stock in the last 24 months: Renaissance Technologies LLC ($16.98K), Empowered Funds LLC ($10.47K), and Dimensional Fund Advisors LP ($8.44K). How much institutional buying is happening at American Shared Hospital Services? Institutional investors have bought a total of 35,881 shares in the last 24 months. This purchase volume represents approximately $0.00 in transactions. Which American Shared Hospital Services major shareholders have been selling company stock? The following institutional investors have sold American Shared Hospital Services stock in the last 24 months: Acadian Asset Management LLC ($63.04K), and Canton Hathaway LLC ($10K). How much institutional selling is happening at American Shared Hospital Services? Institutional investors have sold a total of 73,040 shares in the last 24 months. This volume of shares sold represents approximately $21.91K in transactions. 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