American Shared Hospital Services AMS Institutional Ownership

NYSE AMS

$1.42 -0.03 (-2.07%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

21 Institutions

Increased 8 38.1%

Unchanged 8 38.1%

Reduced 5 23.8%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

7.37%

▼-7.62 pp QoQ

Shares Held by Institutions

506.68K

of 6.87Mn outstanding

▼-30.11% QoQ

Shares Outstanding

6.87Mn

6.37Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

■0 vs prior quarter

Net Shares Added (QoQ)

-218.26K

distributed since last quarter

Value of Holdings

$719.48K

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

American Shared Hospital Services (NYSE:AMS) has 21 institutional investors with active 13F positions as of June 2026.

These investors held 7.4% of outstanding shares in June 2026, down from 15.0% in March 2026.
They decreased total shares held in AMS by -30.11% quarter over quarter, and investors in American Shared Hospital Services increased 16.67% from a year ago.
Activity in AMS broke down as 8 buyers, 5 sellers, and 8 unchanged among 21 total holders.
Institutional investors collectively held 506.68K shares in American Shared Hospital Services as of June 2026, down by 218.26K shares quarter on quarter, and down 338.92K shares year over year.
As of June 30, 2026, the biggest holder of American Shared Hospital Services is DIMENSIONAL FUND ADVISORS LP at 102.14K shares, representing 1.49% of shares outstanding.
The biggest buyers of American Shared Hospital Services for the quarter ending June 2026 included XTX Topco Ltd (19.11K), UBS Group AG (18.2K), RENAISSANCE TECHNOLOGIES LLC (8.5K), LPL Financial LLC (5.02K), MERCER GLOBAL ADVISORS INC /ADV (1.16K).
Leading sellers of American Shared Hospital Services shares for the quarter ending June 2026 were DIMENSIONAL FUND ADVISORS LP (102.98K), VANGUARD CAPITAL MANAGEMENT LLC (98.08K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (61.7K), GEODE CAPITAL MANAGEMENT, LLC (6.09K), VANGUARD FIDUCIARY TRUST CO (2.04K).
Business Quant data shows the 10 biggest positions in American Shared Hospital Services as of June 2026 are held by DIMENSIONAL FUND ADVISORS LP (102.14K), LPL Financial LLC (81.39K), RENAISSANCE TECHNOLOGIES LLC (57.7K), VANGUARD CAPITAL MANAGEMENT LLC (55.66K), JAMES INVESTMENT RESEARCH, INC. (29.72K), NewEdge Advisors, LLC (29.72K), BRIDGEWAY CAPITAL MANAGEMENT, LLC (29.12K), GEODE CAPITAL MANAGEMENT, LLC (26.5K), VANGUARD FIDUCIARY TRUST CO (25.36K), XTX Topco Ltd (19.11K).

Form 13F Holdings

21 Institutional Holders

Report period 30 Jun, 2026

Total shares held 506.68K

Of outstanding 7.37%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	DIMENSIONAL FUND ADVISORS LP	0000354204	102,140	1.49%	▼102,980	-50.20%	$161.38K
2	LPL Financial LLC	0001403438	81,386	1.18%	▲5,020	+6.57%	$128.59K
3	RENAISSANCE TECHNOLOGIES LLC	0001037389	57,695	0.84%	▲8,495	+17.27%	$91.16K
4	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	55,662	0.81%	▼98,075	-63.79%	$87.95K
5	JAMES INVESTMENT RESEARCH, INC.	0000810384	29,725	0.43%	0	0.00%	$46.97K
5	NewEdge Advisors, LLC	0001633516	29,725	0.43%	0	0.00%	$46.97K
6	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0001107261	29,124	0.42%	▼61,696	-67.93%	$46.02K
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	26,497	0.39%	▼6,091	-18.69%	$41.89K
8	VANGUARD FIDUCIARY TRUST CO	0000933478	25,363	0.37%	▼2,043	-7.45%	$40.07K
9	XTX Topco Ltd	0001828301	19,107	0.28%	▲19,107	0.00%	$30.19K
10	UBS Group AG	0001610520	18,395	0.27%	▲18,195	+9,097.50%	$29.06K
11	State Street Corp	0000093751	12,101	0.18%	0	0.00%	$19.12K
12	Empowered Funds, LLC	0001592828	11,924	0.17%	0	0.00%	$18.84K
13	Morgan Stanley	0000895421	5,858	0.09%	0	0.00%	$9.26K
14	MERCER GLOBAL ADVISORS INC /ADV	0000853758	1,165	0.02%	▲1,165	0.00%	$1.84K
15	Citigroup Inc	0000831001	454	0.01%	▲454	0.00%	$717
16	Caitong International Asset Management Co., Ltd	0001963355	107	0.00%	▲107	0.00%	$169
17	JONES FINANCIAL COMPANIES LLLP	0000815917	100	0.00%	0	0.00%	$161
18	Barclays Plc	0000312069	82	0.00%	▲82	0.00%	$130
19	Royal Bank Of Canada	0001000275	69	0.00%	0	0.00%	$0

Showing 1 to 20 of 21 holders