AMERICAN SHARED HOSPITAL SER (AMS) Institutional Ownership Changes & 13F Activity
AMERICAN SHARED HOSPITAL SER (AMS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Corient Private Wealth Llc, Dimensional Fund Advisors Lp, Vanguard Capital Management Llc, Bridgeway Capital Management, Llc, and Susquehanna International Group, Llp.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Bridgeway Capital Management, Llc | Sell | -61,696 | -67.9% | 29,124 | $46.02K | Q2 2026 | Aug 14, 2026 |
| Xtx Topco Ltd | Buy | +19,107 | — | 19,107 | $30.19K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Buy | +82 | — | 82 | $130.00 | Q2 2026 | Aug 14, 2026 |
| Vanguard Capital Management Llc | Sell | -98,075 | -63.8% | 55,662 | $87.95K | Q2 2026 | Aug 13, 2026 |
| Ubs Group Ag | Buy | +18,195 | +9097.5% | 18,395 | $29.06K | Q2 2026 | Aug 13, 2026 |
| Renaissance Technologies LLC | Buy | +8,495 | +17.3% | 57,695 | $91.16K | Q2 2026 | Aug 13, 2026 |
| Vanguard Fiduciary Trust Co | Sell | -2,043 | -7.5% | 25,363 | $40.07K | Q2 2026 | Aug 13, 2026 |
| Geode Capital Management, Llc | Sell | -6,091 | -18.7% | 26,497 | $41.89K | Q2 2026 | Aug 12, 2026 |
| Dimensional Fund Advisors Lp | Sell | -102,980 | -50.2% | 102,140 | $161.38K | Q2 2026 | Aug 11, 2026 |
| Mercer Global Advisors Inc | Buy | +1,165 | — | 1,165 | $1.84K | Q2 2026 | Aug 11, 2026 |
| Lpl Financial Llc | Buy | +5,020 | +6.6% | 81,386 | $128.59K | Q2 2026 | Aug 07, 2026 |
| Caitong International Asset Management Co., Ltd | Buy | +107 | — | 107 | $169.00 | Q2 2026 | Aug 05, 2026 |
| Citigroup Inc | Buy | +454 | — | 454 | $717.00 | Q2 2026 | Aug 03, 2026 |
| Corient Private Wealth Llc | Sell | -160,559 | -100.0% | 0 | $0.00 | Q2 2026 | May 15, 2026 |
| Susquehanna International Group, Llp | Sell | -42,314 | -100.0% | 0 | $0.00 | Q2 2026 | May 15, 2026 |
| Citadel Advisors Llc | Sell | -28,558 | -100.0% | 0 | $0.00 | Q2 2026 | May 15, 2026 |
| Tower Research Capital Llc (Trc) | Sell | -2,814 | -100.0% | 0 | $0.00 | Q2 2026 | May 15, 2026 |
| Drw Securities, Llc | Sell | -32,889 | -100.0% | 0 | $0.00 | Q2 2026 | May 13, 2026 |
Frequently asked questions about AMS activity
Which institutional owners are buying AMS?
Institutional owners buying AMS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in AMS activity?
"Buy" means an investor increased their reported position in AMS compared to the prior reporting period. This reflects growing exposure to AMERICAN SHARED HOSPITAL SER (AMS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in AMS increasing?
Institutional interest in AMS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
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