Security key
029595105
AMERICAN SHARED HOSPITAL SERVICES - Common Stock, no par value (AMS)
CUSIP: 029595105
Q1 2023 13F Holders as of 31 Mar 2023
- Security type / class
- Equity / Common Stock, no par value
- Total 13F shares
- 1,098,901
- Total 13F value
- $3,086,282
- Share change
- +48,344
- SEC-reported price per share
- $2.81
- Number of holders
- 19
- Value change
- +$135,379
- Number of buys
- 7
- Number of sells
- 5
- Shares outstanding
- 6,912,762
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2023
Institutions
19
Top holders
10
AMS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
AMERICAN SHARED HOSPITAL SERVICES SEC filings
AMERICAN SHARED HOSPITAL SERVICES company facts
Broader feeds
Reporting periods
Holder history for CUSIP 029595105
Recent filing periods:
Ownership snapshot
Top reported holders of AMS - AMERICAN SHARED HOSPITAL SERVICES - Common Stock, no par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BRIDGEWAY CAPITAL MANAGEM...
Disclosed value leader
BRIDGEWAY CAPITAL MANAGEM...
Comparable rows
15/15
Latest evidence
31 Dec 2022
13F
Lead comparable stake: 3.8%
Showing 1-6 of 15 holder rows.
Quick read
BRIDGEWAY CAPITAL MANAGEMENT, LLC leads the comparable SEC ownership view at 3.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BRIDGEWAY CAPITAL MANAGEMENT, LLC's linked filing trail.
Comparable ownership
Top 5
BRIDGEWAY CAPITAL MANAGEMENT, LLC
3.8%
Corient Private Wealth LP
2.3%
DIMENSIONAL FUND ADVISORS LP
2.3%
ACADIAN ASSET MANAGEMENT LLC
2.2%
VANGUARD GROUP INC
1.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
Company
|
3.8%
|
$761,117
259,767 shares
|
— | 31 Dec 2022 |
| Corient Private Wealth LP |
13F
Company
|
2.3%
|
$470,438
160,559 shares
|
— | 31 Dec 2022 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
2.3%
|
$465,000
158,681 shares
|
— | 31 Dec 2022 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
2.2%
|
$437,000
149,439 shares
|
— | 31 Dec 2022 |
| VANGUARD GROUP INC |
13F
Company
|
1.5%
|
$306,314
104,544 shares
|
— | 31 Dec 2022 |
| NewEdge Advisors, LLC |
13F
Company
|
1%
|
$189,649
70,181 shares
|
— | 31 Dec 2022 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
19
Shares
1,098,901
Rows available
19
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2023 vs Q1 2026 Across Filers
Q1 2026 holders
19
Q1 2023 holders
19
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2023 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend