American Shared Hospital Services AMS Institutional Ownership

Updated Oct 10, 2026

American Shared Hospital Services (NYSE:AMS) was held by 20 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• Together they owned 7.37% of the outstanding stock in Q2 2026, down from 15.03% a quarter earlier.
• Total shares held in American Shared Hospital Services fell 48.93% from Q1 2026, while the number of holders rose 17.65% from Q2 2025.
• Looking at the 20 holders of AMS individually, 8 added to their positions, 5 reduced their stakes and 7 left their positions unchanged.
• Altogether, institutional holders owned 506.68K AMS shares at the end of Q2 2026, down 485.39K from the prior quarter and down 338.92K from a year earlier.
• Dimensional Fund Advisors LP was the top holder of American Shared Hospital Services as of June 30, 2026, with 102.14K shares, or 1.49% of shares outstanding.
• Among existing holders, the largest additions to American Shared Hospital Services in Q2 2026 came from UBS Group AG (+18.2K shares), Renaissance Technologies LLC (+8.49K shares) and LPL Financial LLC (+5.02K shares).
• Holders that trimmed the most shares of American Shared Hospital Services in Q2 2026 while keeping a position were Dimensional Fund Advisors LP (-102.98K shares), Vanguard Capital Management LLC (-98.08K shares), Bridgeway Capital Management, LLC (-61.7K shares), Geode Capital Management, LLC (-6.09K shares) and Vanguard Fiduciary Trust Co (-2.04K shares).
• Per Business Quant, the top 10 investors in AMS for the quarter ended June 30, 2026 were Dimensional Fund Advisors LP (102.14K shares), LPL Financial LLC (81.39K shares), Renaissance Technologies LLC (57.7K shares), Vanguard Capital Management LLC (55.66K shares), James Investment Research, Inc. (29.73K shares), NewEdge Advisors, LLC (29.73K shares), Bridgeway Capital Management, LLC (29.12K shares), Geode Capital Management, LLC (26.5K shares), Vanguard Fiduciary Trust Co (25.36K shares) and XTX Topco Ltd (19.11K shares).