American Shared Hospital SER (AMS)

CUSIP: 029595105 | NYSE | Healthcare · Medical Care Facilities | Micro Cap | 70 institutional holders

Compare Detailed Historical Funds Options 13D/13G Peers Targeting Trading Summary Profile

Beneficial Ownership — 13D / 13G

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

Holder	Shares	% of Class	Change	Event Date	vs 13F
13D/AStachowiak Raymond C with RCS Holdings LLC, Stachowiak Equity Fund, LLC, RCS Investments, Inc.	2,440,205	35.3%	+220,000	Jul 22, 2026	No 13F filer matched
13D/ATigh II, LLC	0	0.0%	No shares held	Jun 22, 2026	No 13F filer matched
13D/ARuffle John F	0	0.0%	No shares held	Sep 29, 2025	No 13F filer matched

13D/AStachowiak Raymond C2,440,205

35.3% of class · Jul 22, 2026+220,000

with RCS Holdings LLC, Stachowiak Equity Fund, LLC, RCS Investments, Inc.

No 13F filer matched

13D/ATigh II, LLC0

0.0% of class · Jun 22, 2026No shares held

No 13F filer matched

13D/ARuffle John F0

0.0% of class · Sep 29, 2025No shares held

No 13F filer matched

Institutional Holders — Q3 2026

Sort by

Dimensional Fund Advisors LP102,004

0.0% of portfolio$144.8K

James Investment Research, Inc.29,725

0.0% of portfolio$42.2K

Caitong International Asset Management Co., Ltd107

0.0% of portfolio$152

				Style	Turnover	Location	Filed
Dimensional Fund Advisors LP	102,004	$144.8K	0.0%	Index	Low	Austin, TX	2026-11-04
James Investment Research, Inc.	29,725	$42.2K	0.0%	Core	Low	Alpha, OH	2026-10-22
Caitong International Asset Management Co., Ltd	107	$152	0.0%	Growth	Very High	Hong Kong, South Korea	2026-10-29