American Shared Hospital Services (AMS)
NYSE: AMS · Services-Medical Laboratories · San Francisco, CA · filing with the SEC since 1995
Who owns American Shared Hospital Services
As filed with the SECHolders of 5% or more
1
Stachowiak Raymond C holds 35.3% of Common Stock, no par value, as its SCHEDULE 13D/A filed Jul 30, 2026 says.
Directors and officers
2
report now, of 17 people on the record since 2008. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 1 named at left.
Holders of 5% or moreshare of the class, as filed
Stachowiak Raymond C
SCHEDULE 13D/A · filed Jul 30, 2026 · Common Stock, no par value · 33% in Jun 25, 2026
Anita G. Zucker
SCHEDULE 13D/A · filed Jun 23, 2026 · Common Stock, No Par Value · reported falling below 5%, from 9.1% in May 9, 2025
Ruffle John F
SCHEDULE 13D/A · filed Dec 16, 2025 · Common Stock, no par value · reported falling below 5%
What AMS reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC
A company bought · acquisition · owns, named in the 10-K filed Mar 31, 2026
22 subsidiaries in 1 country, from the list filed with the 10-K filed Mar 31, 2026.
Insider tradesForm 4
0sales
1purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$1.3Mbought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window1 of 17 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Stachowiak Raymond C | Executive Chairman | 0 | $0 | 0 | 1 | $1.3M |