American Shared Hospital Services AMS
We take great care to ensure that the data presented and summarized in this overview for AMERICAN SHARED HOSPITAL SERVICES is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.
Top Institutions Holding AMS
View all-
Dimensional Fund Advisors LP Austin, TX210KShares$461,9090.0% of portfolio
-
Vanguard Group Inc Valley Forge, PA181KShares$398,5140.0% of portfolio
-
Ci Private Wealth, LLC Miami, FL161KShares$353,2290.0% of portfolio
-
Bridgeway Capital Management, LLC Houston, TX96.7KShares$212,7200.01% of portfolio
-
Jim Simons Renaissance Technologies LLC | New York, Ny49.8KShares$109,5600.0% of portfolio
-
Geode Capital Management, LLC Boston, MA32.7KShares$71,8630.0% of portfolio
-
James Investment Research Inc29.7KShares$65,3950.01% of portfolio
-
New Edge Advisors, LLC New Orleans, LA29.7KShares$65,3950.0% of portfolio
-
State Street Corp Boston, MA12.1KShares$26,6220.0% of portfolio
-
Empowered Funds, LLC11.9KShares$26,2320.0% of portfolio
Latest Institutional Activity in AMS
Top Purchases
Top Sells
About AMS
American Shared Hospital Services leases radiosurgery and radiation therapy equipment to health care providers. The company offers radiosurgery equipment for the Gamma Knife stereotactic radiosurgery, a non-invasive procedure to treat malignant and benign brain tumors, and arteriovenous malformations, as well as for trigeminal neuralgia. It also provides financing services for Leksell Gamma Knife units. In addition, the company offers proton beam radiation therapy services in Orlando, Florida and Long Beach, California, as well as offers planning, installation, reimbursement, and marketing support services to its customers. As of December 31, 2021, it had 115 operating Gamma Knife units located in the United States, as well as two in South America in Lima, Peru and Guayaquil, Ecuador. The company also operates one PBRT system. American Shared Hospital Services was founded in 1980 and is based in San Francisco, California.
Insider Transactions at AMS
Insider Transaction List
View all| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Jun 26
2025
|
Raymond C Stachowiak Executive Chairman |
BUY
Grant, award, or other acquisition
|
Direct |
110,000
+14.2%
|
-
|
|
Apr 30
2025
|
Craig Kenji Tagawa President |
BUY
Grant, award, or other acquisition
|
Direct |
5,613
+13.65%
|
-
|
|
Dec 19
2024
|
Raymond Scott Frech Chief Financial Officer |
BUY
Grant, award, or other acquisition
|
Direct |
50,000
+50.0%
|
-
|
|
Oct 14
2024
|
Gary Delanois Chief Operating Officer |
BUY
Grant, award, or other acquisition
|
Direct |
120,000
+50.0%
|
-
|
|
Mar 22
2024
|
Raymond C Stachowiak Executive Chairman |
BUY
Grant, award, or other acquisition
|
Direct |
120,000
+17.79%
|
-
|
|
Mar 28
2023
|
Raymond C Stachowiak Executive Chairman |
BUY
Grant, award, or other acquisition
|
Direct |
120,000
+18.29%
|
-
|
|
Mar 07
2023
|
Craig Kenji Tagawa President |
BUY
Grant, award, or other acquisition
|
Direct |
10,827
+26.59%
|
-
|
|
May 31
2022
|
Raymond C Stachowiak Executive Chairman |
BUY
Exercise of conversion of derivative security
|
Direct |
2,000
+0.48%
|
$4,000
$2.7 P/Share
|
|
Apr 01
2022
|
Craig Kenji Tagawa President |
BUY
Grant, award, or other acquisition
|
Direct |
5,529
+22.48%
|
-
|
|
Apr 01
2022
|
Ernest Robert Bates Sr.VP Sales and Business Devel |
BUY
Grant, award, or other acquisition
|
Direct |
801
+2.93%
|
-
|
|
Jan 03
2022
|
Raymond C Stachowiak Executive Chairman |
BUY
Grant, award, or other acquisition
|
Direct |
120,000
+22.46%
|
-
|
|
Dec 28
2021
|
Kathleen Miles Director |
BUY
Grant, award, or other acquisition
|
Direct |
3,000
+50.0%
|
-
|
|
Dec 28
2021
|
Vicki L Wilson Director |
BUY
Grant, award, or other acquisition
|
Direct |
3,000
+50.0%
|
-
|
|
Jul 01
2021
|
Raymond C Stachowiak Executive Chairman |
BUY
Grant, award, or other acquisition
|
Direct |
60,000
+16.94%
|
$120,000
$2.94 P/Share
|
|
Jun 25
2021
|
Saim Mert Ozyurek Director |
BUY
Grant, award, or other acquisition
|
Direct |
1,000
+1.54%
|
-
|
|
Jun 25
2021
|
Sandra Aj Lawrence Director |
BUY
Grant, award, or other acquisition
|
Direct |
1,000
+2.54%
|
-
|
|
Jun 25
2021
|
Daniel G Kelly Jr Director |
BUY
Grant, award, or other acquisition
|
Direct |
1,000
+1.97%
|
-
|
|
Jun 25
2021
|
David Larson Director |
BUY
Grant, award, or other acquisition
|
Direct |
1,000
+1.1%
|
-
|
|
Jun 04
2021
|
David Larson Director |
BUY
Exercise of conversion of derivative security
|
Direct |
25,000
+3.68%
|
$50,000
$2.68 P/Share
|
|
Jun 04
2021
|
David Larson Director |
SELL
Payment of exercise price or tax liability
|
Direct |
15,121
-2.75%
|
$45,363
$3.13 P/Share
|
Last 12 Months Summary
| Grant, award, or other acquisition | 116K shares |
|---|