American Shared Hospital Services
AMS · NYSE American
$1.25−$0.0147 (−1.16%)TodayMarket closed ·
Prev close $1.26
Who owns AMS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 40.3% of AMS’s shares.
- Stachowiak (Raymond C)33.5%
- Dimensional Fund Advisors, L.P.1.5%
- LPL Financial LLC1.2%
- Renaissance Technologies LLC0.9%
- Next 6 largest institutions3.1%
- All other shareholders59.7%
| Holder | Shares | % of shares |
|---|---|---|
| Stachowiak (Raymond C) | 2.22M | 33.54% |
| Dimensional Fund Advisors, L.P. | 102.14K | 1.54% |
| LPL Financial LLC | 81.39K | 1.23% |
| Renaissance Technologies LLC | 57.70K | 0.87% |
| Vanguard Capital Management, LLC | 55.66K | 0.84% |
| Tagawa (Craig Kenji) | 35.50K | 0.54% |
| NewEdge Advisors, LLC | 29.73K | 0.45% |
| James Investment Research Inc. | 29.73K | 0.45% |
| Bridgeway Capital Management, LLC | 29.12K | 0.44% |
| Geode Capital Management, L.L.C. | 26.50K | 0.40% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| DFA US Small Cap Value Portfolio | 92.08K | 1.39% |
| Vanguard Extended Market Index Fund | 55.66K | 0.84% |
| DFA U.S. Targeted Value Portfolio | 38.41K | 0.58% |
| Fidelity Extended Market Index Fund | 21.06K | 0.32% |
| EA Bridgeway Omni Small-Cap Value ETF | 11.92K | 0.18% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $1.34M (1 trade) of AMS on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Stachowiak Raymond C | Award | 220.00K | — |
| Stachowiak Raymond C | Buy | 586.47K | $1.34M |
Short interest
Settled Sep 30, 2026
- Shares short
- 8.29K
- Days to cover
- 1.04
- % of shares outstanding
- 0.13%
- Average daily volume
- 7.99K
- Change since last report
- +52.5%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.