American Shared Hospital Services (AMS) Institutional Ownership

Ownership Summary

American Shared Hospital Services (NYSE:AMS) has 19 institutional investors with active 13F positions as of December 2025.

• They owned 15.9% of outstanding stock in December 2025, up from 12.5% the prior quarter.
• They increased total shares held in AMS by 28.16% quarter over quarter, and investors in American Shared Hospital Services increased 18.75% from a year ago.
• Activity in AMS broke down as 6 buyers, 5 sellers, and 8 unchanged among 19 total holders.
• In total, institutional investors held 1.05Mn shares in American Shared Hospital Services as of December 2025, up by 231.8K shares quarter on quarter, and up 53.9K shares year over year.
• DIMENSIONAL FUND ADVISORS LP holds the largest position in AMS at 205.12K shares as of December 31, 2025, or 3.09% of shares outstanding.
• Top purchasers of AMS stock for the quarter ending December 2025 included VANGUARD CAPITAL MANAGEMENT LLC (153.74K), LPL Financial LLC (76.37K), CITADEL ADVISORS LLC (28.56K), VANGUARD FIDUCIARY TRUST CO (27.41K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (14.94K).
• The largest sellers of American Shared Hospital Services for the quarter ending December 2025 were Corient Private Wealth LLC (160.56K), DRW Securities, LLC (17.59K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (3.3K), DIMENSIONAL FUND ADVISORS LP (1.29K), Morgan Stanley (450).
• Per Business Quant data, the top 10 holders of American Shared Hospital Services for the quarter ending December 2025 are DIMENSIONAL FUND ADVISORS LP (205.12K), Corient Private Wealth LLC (160.56K), VANGUARD CAPITAL MANAGEMENT LLC (153.74K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (90.82K), LPL Financial LLC (76.37K), RENAISSANCE TECHNOLOGIES LLC (49.2K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (42.31K), DRW Securities, LLC (32.89K), GEODE CAPITAL MANAGEMENT, LLC (32.59K), JAMES INVESTMENT RESEARCH, INC. (29.72K).