Latest Period
Q1 2026
Security Snapshot
AMERICAN SHARED HOSPITAL SERVICES - Common Stock, no par value (AMS) Institutional Ownership
CUSIP: 029595105
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
19
Shares (Excl. Options)
992,004
Price
$1.45
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- Security type / class
- Equity / Common Stock, no par value
- Symbol
- AMS on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 992,004
- Total 13F value
- $1,438,462
- Portfolio coverage rank
- 0%
- Share change
- +109,752
- Value change
- +$159,008
- Number of holders
- 19
- Shares outstanding
- 6,585,388
- SEC-reported price per share
- $2.01
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- AMS - AMERICAN SHARED HOSPITAL SERVICES - Common Stock, no par value is tracked under CUSIP 029595105.
- 19 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 16 to 19 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $1,861,580 to $1,438,462.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 19 institutions filings for Q1 2026.
Security key
029595105
Latest holder period
Q1 2026
13F holders
19
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
AMS full holder history
AMERICAN SHARED HOSPITAL SERVICES SEC filings
AMERICAN SHARED HOSPITAL SERVICES company facts
AMERICAN SHARED HOSPITAL SERVICES insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 029595105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
AMS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Stachowiak Raymond C | 24% | +3.9% | $3,558,480 | +$189,240 | 1,560,737 | +5.6% | Stachowiak Raymond C | 01 Oct 2025 |
| Zucker Anita G | 9.1% | +15% | $1,595,193 | +$213,115 | 586,468 | +15% | Anita G. Zucker | 08 May 2025 |
As of 31 Mar 2026, 19 institutional investors reported holding 992,004 shares of AMERICAN SHARED HOSPITAL SERVICES - Common Stock, no par value (AMS). This represents 15% of the company’s total 6,585,388 outstanding shares.
13F concentration
Top 21 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
15%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | 3.1% | 205,120 | -0.63% | 0% | $297,424 |
| Corient Private Wealth LLC | 2.4% | 160,559 | 0% | 0% | $232,811 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.3% | 153,737 | 0% | 0% | $222,919 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1.4% | 90,820 | -3.5% | 0% | $131,689 |
| LPL Financial LLC | 1.2% | 76,366 | 0% | $110,731 | |
| RENAISSANCE TECHNOLOGIES LLC | 0.75% | 49,200 | -0.4% | 0% | $71,340 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.64% | 42,314 | +55% | 0% | $61,355 |
| DRW Securities, LLC | 0.5% | 32,889 | -35% | 0% | $47,689 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.49% | 32,588 | -0.24% | 0% | $47,273 |
| JAMES INVESTMENT RESEARCH, INC. | 0.45% | 29,725 | 0% | 0% | $43,101 |
| NewEdge Advisors, LLC | 0.45% | 29,725 | 0% | 0% | $43,101 |
| CITADEL ADVISORS LLC | 0.43% | 28,558 | 0% | $41,409 | |
| VANGUARD FIDUCIARY TRUST CO | 0.42% | 27,406 | 0% | 0% | $39,739 |
| STATE STREET CORP | 0.18% | 12,101 | 0% | 0% | $17,546 |
| Empowered Funds, LLC | 0.18% | 11,924 | 0% | $17,290 | |
| MORGAN STANLEY | 0.09% | 5,858 | -7.1% | 0% | $8,494 |
| Tower Research Capital LLC (TRC) | 0.04% | 2,814 | +45% | 0% | $4,080 |
| UBS Group AG | 0% | 200 | 0% | $290 | |
| JONES FINANCIAL COMPANIES LLLP | 0% | 100 | 0% | 0% | $181 |
| BANK OF AMERICA CORP /DE/ | 0% | 0 | -100% | $0 | |
| CITIGROUP INC | 0% | 0 | -100% | $0 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 992,004 | $1,438,462 | +$159,008 | $1.45 | 19 |
| 2025 Q4 | 882,252 | $1,861,580 | -$1,052,593 | $2.11 | 16 |
| 2025 Q3 | 829,997 | $2,323,695 | -$59,678 | $2.80 | 20 |
| 2025 Q2 | 851,957 | $2,052,429 | -$117,209 | $2.41 | 18 |
| 2025 Q1 | 895,265 | $2,488,840 | -$461,819 | $2.78 | 18 |
| 2024 Q4 | 1,061,391 | $3,385,797 | -$53,407 | $3.19 | 17 |
| 2024 Q3 | 1,078,673 | $3,289,131 | -$27,334 | $3.05 | 18 |
| 2024 Q2 | 1,087,419 | $3,472,254 | +$93,742 | $3.20 | 19 |
| 2024 Q1 | 1,058,385 | $3,121,613 | +$48,922 | $2.95 | 19 |
| 2023 Q4 | 1,048,628 | $2,503,025 | -$107,560 | $2.38 | 18 |
| 2023 Q3 | 1,093,682 | $2,698,048 | -$2,172 | $2.47 | 21 |
| 2023 Q2 | 1,094,301 | $2,794,752 | -$11,708 | $2.56 | 18 |
| 2023 Q1 | 1,098,901 | $3,086,282 | +$135,379 | $2.81 | 19 |
| 2022 Q4 | 1,050,557 | $3,061,300 | +$61,925 | $2.93 | 18 |
| 2022 Q3 | 850,752 | $2,202,000 | +$108,097 | $2.59 | 14 |
| 2022 Q2 | 808,281 | $1,795,000 | +$54,787 | $2.22 | 13 |
| 2022 Q1 | 783,424 | $1,832,000 | -$51,178 | $2.34 | 13 |
| 2021 Q4 | 805,635 | $1,908,480 | -$190,614 | $2.37 | 17 |
| 2021 Q3 | 877,824 | $2,421,040 | +$60,860 | $2.76 | 15 |
| 2021 Q2 | 853,693 | $2,500,720 | +$549,997 | $2.93 | 14 |
| 2021 Q1 | 670,401 | $1,856,620 | +$359,179 | $2.77 | 15 |
| 2020 Q4 | 541,613 | $1,202,000 | +$53,417 | $2.22 | 13 |
| 2020 Q3 | 521,750 | $946,000 | +$25,333 | $1.82 | 12 |
| 2020 Q2 | 501,882 | $1,074,000 | -$260,136 | $2.14 | 12 |
| 2020 Q1 | 672,624 | $1,042,000 | -$124,927 | $1.55 | 14 |