---
title: "American Shared Hospital Services (AMS.US) — Company Overview"
type: "Symbol"
locale: "en"
url: "https://longbridge.com/en/quote/AMS.US/overview.md"
symbol: "AMS.US"
name: "American Shared Hospital Services"
parent: "https://longbridge.com/en/quote/AMS.US.md"
datetime: "2026-04-15T16:04:32.602Z"
locales:
  - [en](https://longbridge.com/en/quote/AMS.US/overview.md)
  - [zh-CN](https://longbridge.com/zh-CN/quote/AMS.US/overview.md)
  - [zh-HK](https://longbridge.com/zh-HK/quote/AMS.US/overview.md)
---

# American Shared Hospital Services (AMS.US) — Company Overview

## Basic Information

| Item | Detail |
|------|--------|
| Industry | Health Care Services |
| Exchange | US Market |
| Address | 601 Montgomery Street, Suite 1112, San Francisco, California, United States |
| Website | [ashs.com](https://ashs.com) |

## Company Profile

American Shared Hospital Services provides technology solutions for stereotactic radiosurgery and advanced radiation therapy equipment and services. It operates in two segments, Leasing and Retail. The company leases nine Gamma Knife systems and one proton beam radiation therapy (PBRT) system; and provides planning, installation, reimbursement, and marketing support services. It also owns and operates two single-unit Gamma Knife facilities that provides radiosurgery services directly to the patient.

## Key Executives

| Name | Title |
|------|-------|
| Raymond C. Stachowiak | Executive Chairman |
| Gary Delanois | Chief Executive Officer |
| Craig K. Tagawa | President, COO & Assistant Secretary |
| Raymond Scott Frech | Chief Financial Officer |
| Alexis N. Wallace | Chief Accounting Officer & Corporate Secretary |
| Daniel G. Kelly | Lead Independent Director |
| Kathleen Miles | Independent Director |
| Vicki L. Wilson | Independent Director |

## Major Shareholders

| Name | Ratio | Report Date |
|------|-------|-------------|
| Raymond C. Stachowiak | 22.35% | 2025-10-01 |
| Estate Of Ernest A. Bates | 8.97% | 2025-04-28 |
| The InterTech Group, Inc. | 8.88% | 2025-05-08 |
| National Philanthropic Trust | 6.22% | 2025-09-29 |
| Dimensional Fund Advisors LP | 3.13% | 2025-12-31 |
| The Vanguard Group, Inc. | 2.74% | 2025-12-31 |
| Corient Private Wealth LLC | 2.43% | 2025-12-31 |
| Bridgeway Capital Management, LLC | 1.61% | 2025-12-31 |
| DRW Holdings, LLC | 0.76% | 2025-12-31 |
| Renaissance Technologies LLC | 0.75% | 2025-12-31 |

## Business Breakdown

| Segment | Revenue | Ratio |
|---------|---------|-------|
| Direct Patient Services | 15500000 | 55.16% |
| Leasing | 12600000 | 44.84% |

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---

> **Disclaimer: This article is for reference only and does not constitute any investment advice.**