AMERICAN SHARED HOSPITAL SERVICES - AMS
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | History | No change | 181,143 | 382 | 0.0% | 0.0% | 1 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 205,120 | 297 | 0.0% | 0.0% | 2 | -1,294 | -0.63% | Q1 2026 | May 07, 2026 |
| Corient Private Wealth LLC | History | No change | 160,559 | 232 | 0.0% | 0.0% | 3 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 153,737 | 222 | 0.0% | — | 4 | +153,737 | New | Q1 2026 | May 15, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Reduced | 90,820 | 131 | 0.0% | 0.0% | 5 | -3,300 | -3.51% | Q1 2026 | May 15, 2026 |
| LPL Financial LLC | History | New | 76,366 | 110 | 0.0% | — | 6 | +76,366 | New | Q1 2026 | May 06, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Reduced | 49,200 | 71 | 0.0% | 0.0% | 7 | -200 | -0.4% | Q1 2026 | May 14, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 42,314 | 61 | 0.0% | 0.0% | 8 | +14,943 | 54.59% | Q1 2026 | May 15, 2026 |
| DRW Securities, LLC | History | Reduced | 32,889 | 47 | 0.0% | 0.0% | 10 | -17,592 | -34.85% | Q1 2026 | May 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 32,588 | 47 | 0.0% | 0.0% | 9 | -77 | -0.24% | Q1 2026 | May 15, 2026 |
| JAMES INVESTMENT RESEARCH, INC. | History | No change | 29,725 | 43 | 0.0% | 0.01% | 11 | 0 | 0.0% | Q1 2026 | Apr 24, 2026 |
| CITADEL ADVISORS LLC | History | New | 28,558 | 41 | 0.0% | — | 12 | +28,558 | New | Q1 2026 | May 15, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 27,406 | 39 | 0.0% | — | 13 | +27,406 | New | Q1 2026 | May 08, 2026 |
| NewEdge Advisors, LLC | History | No change | 29,725 | 29 | 0.0% | 0.0% | 14 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Empowered Funds, LLC | History | New | 11,924 | 17 | 0.0% | — | 16 | +11,924 | New | Q1 2026 | May 14, 2026 |
| STATE STREET CORP | History | No change | 12,101 | 17 | 0.0% | 0.0% | 15 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| MORGAN STANLEY | History | Reduced | 5,858 | 8 | 0.0% | 0.0% | 17 | -450 | -7.13% | Q1 2026 | May 15, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 2,814 | 4 | 0.0% | 0.0% | 18 | +876 | 45.2% | Q1 2026 | May 15, 2026 |
| UBS Group AG | History | New | 200 | 0 | — | — | — | +200 | New | Q1 2026 | May 05, 2026 |
| CITIGROUP INC | History | Closed out | 0 | 0 | — | — | — | -142 | -100.0% | Q1 2026 | May 11, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Closed out | 0 | 0 | — | — | — | -60 | -100.0% | Q1 2026 | May 15, 2026 |
| ROYAL BANK OF CANADA | History | Added to | 69 | 0 | — | — | — | +8 | 13.11% | Q1 2026 | May 15, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | No change | 100 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 15, 2026 |