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.
• Their total shares held in AMS increased 28.16% from the prior quarter, while the number of investors in American Shared Hospital Services increased 18.75% year over year.
• Of these 19 funds, 6 grew their exposure to American Shared Hospital Services, 5 cut back, and 8 maintained positions.
• The aggregate institutional position in American Shared Hospital Services amounted to 1.05Mn shares as of December 2025, up by 231.8K shares quarter on quarter, and up 53.9K shares year over year.
• DIMENSIONAL FUND ADVISORS LP leads ownership in AMS with 205.12K shares as of December 31, 2025, equal to 3.09% of outstanding shares.
• The largest buyers of American Shared Hospital Services for the quarter ending December 2025 were 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 biggest sellers of American Shared Hospital Services for the quarter ending December 2025 included 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).
• American Shared Hospital Services's 10 largest shareholders as of December 2025 include 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), NewEdge Advisors, LLC (29.72K) per Business Quant data.