American Shared Hospital Services (AMS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

6,428,571Shares Outstanding

267,658Shares held by institutions

$588,848Value of institutional holdings

10.95%Institutional ownership %

11.27%Shares Changed QoQ

17No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, American Shared Hospital Services (NYSE:AMS) is held by 17 institutional firms.

Institutional ownership in American Shared Hospital Services edged down to 11.0% in December 2025, compared to 12.9% in September 2025.
Institutional share ownership changed by 11.27% QoQ, while the number of institutional owners saw an increase of 6.25% YoY.
Of these 17 institutional investors, 5 increased their holdings in American Shared Hospital Services, while 5 of them reduced positions, and 7 investors maintained their exposure.
Collectively, institutional investors increased their stake in American Shared Hospital Services to 703.95K shares as of December 2025, a change that is up by 71.30K shares quarter on quarter and down 290.59K shares year over year.
DIMENSIONAL FUND ADVISORS LP's holding of 206.41K shares as of December 31, 2025 makes it the primary institutional investor in American Shared Hospital Services, owning 3.21% of the stock.
Among the most significant buyers of American Shared Hospital Services during December 2025 were DRW Securities, LLC (50.48K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (27.37K), Tower Research Capital LLC (TRC) (283), CITIGROUP INC (142), ROYAL BANK OF CANADA (49).
Leading sellers of American Shared Hospital Services stock in December 2025 included DIMENSIONAL FUND ADVISORS LP (3.54K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (2.57K), MORGAN STANLEY (502), RENAISSANCE TECHNOLOGIES LLC (400), BANK OF AMERICA CORP /DE/ (5).
The top 10 institutional holders of American Shared Hospital Services for the quarter ending December 2025 included DIMENSIONAL FUND ADVISORS LP (206.41K), VANGUARD GROUP INC (181.14K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (94.12K), DRW Securities, LLC (50.48K), RENAISSANCE TECHNOLOGIES LLC (49.40K), GEODE CAPITAL MANAGEMENT, LLC (32.66K), JAMES INVESTMENT RESEARCH, INC. (29.73K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (27.37K), STATE STREET CORP (12.10K), Empowered Funds, LLC (11.92K).

17 Institutional Holders

267,658 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	206,414	-3,545	-1.69%	$435,534.00
VANGUARD GROUP INC	31 Dec, 2025	181,143	0	0.00%	$382,212.00
BRIDGEWAY CAPITAL MANAGEMENT, LLC	31 Dec, 2025	94,120	-2,571	-2.66%	$198,593.00
DRW Securities, LLC	31 Dec, 2025	50,481	50,481	0.00%	$106,514.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	49,400	-400	-0.80%	$104,234.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	32,665	0	0.00%	$68,952.00
JAMES INVESTMENT RESEARCH, INC.	31 Dec, 2025	29,725	0	0.00%	$62,720.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	27,371	27,371	0.00%	$57,753.00
STATE STREET CORP	31 Dec, 2025	12,101	0	0.00%	$25,533.00
Empowered Funds, LLC	31 Dec, 2025	11,924	0	0.00%	$25,160.00
MORGAN STANLEY	31 Dec, 2025	6,308	-502	-7.37%	$13,310.00
Tower Research Capital LLC (TRC)	31 Dec, 2025	1,938	283	17.10%	$4,089.00
CITIGROUP INC	31 Dec, 2025	142	142	0.00%	$300.00
JONES FINANCIAL COMPANIES LLLP	31 Dec, 2025	100	0	0.00%	$211.00
ROYAL BANK OF CANADA	31 Dec, 2025	61	49	408.33%	$0.00
BANK OF AMERICA CORP /DE/	31 Dec, 2025	60	-5	-7.69%	$126.00
WELLS FARGO & COMPANY/MN	31 Dec, 2025	0	0	0.00%	$1.00

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