Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

AMERICAN SHARED HOSPITAL SERVICES

CIK 0000744825AMS· quarter ending 2026-06-30
Shares outstanding
6,650,000
Held by 13F filers
505,514
7.6% of shares outstanding
Holders
20
-1 vs 2026-03-31 · 4 new, 5 exited
Value
$799K
shares -49.0% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-13, as of 2026-08-11)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockAMS · NYSEAMER6,650,000505,5147.6%20029595105

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
029595105COM20505,5146,650,0007.6%$799K—13DGholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (20 of 20 · 029595105)

change vs 2026-03-31
#FilerShares% of classValueChange
1DIMENSIONAL FUND ADVISORS LP102,1401.54%$161K-102,980 (-50.2%)
2LPL Financial LLC81,3861.22%$129K+5,020 (+6.6%)
3RENAISSANCE TECHNOLOGIES LLC57,6950.87%$91K+8,495 (+17.3%)
4VANGUARD CAPITAL MANAGEMENT LLC55,6620.84%$88K-98,075 (-63.8%)
5JAMES INVESTMENT RESEARCH, INC.29,7250.45%$47K—
6NewEdge Advisors, LLC29,7250.45%$47K—
7BRIDGEWAY CAPITAL MANAGEMENT, LLC29,1240.44%$46K-61,696 (-67.9%)
8GEODE CAPITAL MANAGEMENT, LLC26,4970.40%$42K-6,091 (-18.7%)
9VANGUARD FIDUCIARY TRUST CO25,3630.38%$40K-2,043 (-7.5%)
10XTX Topco Ltd19,1070.29%$30KNEW
11UBS Group AG18,3950.28%$29K+18,195 (+9097.5%)
12STATE STREET CORP12,1010.18%$19K—
13Empowered Funds, LLC11,9240.18%$19K—
14MORGAN STANLEY5,8580.09%$9K—
15CITIGROUP INC4540.01%$717NEW
16Caitong International Asset Management Co., Ltd1070.00%$169NEW
17JONES FINANCIAL COMPANIES LLLP1000.00%$161—
18BARCLAYS PLC820.00%$130NEW
19ROYAL BANK OF CANADA690.00%$0—
20WELLS FARGO & COMPANY/MN00.00%$0—
Exited since 2026-03-31 (5 filers; largest 5 shown)
Corient Private Wealth LLC−160,559
SUSQUEHANNA INTERNATIONAL GROUP, LLP−42,314
DRW Securities, LLC−32,889
CITADEL ADVISORS LLC−28,558
Tower Research Capital LLC (TRC)−2,814

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
RCS Investments, Inc.SCHEDULE 13D/A2026-07-302026-07-22752,50011.4%
RCS/TIG Holdings LLCSCHEDULE 13D/A2026-07-302026-07-22806,46811.8%
Stachowiak Equity Fund, LLCSCHEDULE 13D/A2026-07-302026-07-22760,55911.5%
Stachowiak Raymond CSCHEDULE 13D/A2026-07-302026-07-222,440,20535.3%
Anita G. ZuckerSCHEDULE 13D/A2026-06-232026-06-2200%
TIGH II, LLCSCHEDULE 13D/A2026-06-232026-06-2200%
RUFFLE JOHN FSCHEDULE 13D/A2025-12-162025-09-2900%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.