American Shared Hospital Services (AMS) ownership: Top institutional holder: VANGUARD GROUP INC ($382212.00). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 181143.00 | $382212.00 | 2025-12-31 |
| DIMENSIONAL FUND ADVISORS LP | 205120.00 | $297424.00 | 2026-03-31 |
| Corient Private Wealth LLC | 160559.00 | $232811.00 | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 153737.00 | $222919.00 | 2026-03-31 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 90820.00 | $131689.00 | 2026-03-31 |
| LPL Financial LLC | 76366.00 | $110731.00 | 2026-03-31 |
| RENAISSANCE TECHNOLOGIES LLC | 49200.00 | $71340.00 | 2026-03-31 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 42314.00 | $61355.00 | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-03-26 | |
| Sell | null | 2026-03-26 | |
| Sell | null | 2025-06-26 | |
| Sell | null | 2025-04-30 | |
| Sell | null | 2024-12-19 | |
| Sell | null | 2024-10-14 | |
| Sell | null | 2024-03-22 | |
| Sell | null | 2023-04-17 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.