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Livermore
Livermore
ZHEN

American Shared Hospital Services

AMS
Exchange
NYSE
Industry
Services-Medical Laboratories
SEC CIK
0000744825

No open-market purchases or sales by American Shared Hospital Services insiders were filed in the last 90 days; 19 institutions reported holding it in 13F filings for Q2 2026, worth $798.6K in total; no superinvestor holds it.

Holders of 5% or more of AMS

Holders whose latest Schedule 13D or 13G filing reports 5% or more of American Shared Hospital Services, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of AMS
HolderLatest formStakeChangeFirst filedLatest filingFiling
Stachowiak Raymond C13D/A23.70%1.56M shares+0.90 ppfrom 22.80%Jan 3, 20252 filingsDec 9, 2025SEC
Zucker Anita G13D/A9.10%586.5K shares+1.20 ppfrom 7.90%Mar 7, 20252 filingsMay 9, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

5 Schedule 13D and 13G filings on American Shared Hospital Services, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on AMS
Filed (ET)FilerFormStakeChangeEvent dateFiling
Dec 16, 20255:23 PM ETRuffle John F13D/A0.00%0 shares–Below 5%Sep 29, 2025SEC
Dec 9, 20253:29 PM ETStachowiak Raymond Cand 2 others13D/A23.70%1.56M shares+0.90 ppfrom 22.80%Oct 1, 2025SEC
May 9, 20257:06 AM ETZucker Anita Gand 1 other13D/A9.10%586.5K shares+1.20 ppfrom 7.90%May 8, 2025SEC
Mar 7, 202511:01 AM ETZucker Anita Gand 1 other13D/A7.90%508.1K shares–Mar 6, 2025SEC
Jan 3, 20254:34 PM ETStachowiak Raymond Cand 2 others13D/A22.80%1.48M shares–Jan 1, 2025SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell American Shared Hospital Services shares.

No Form 144 notices for American Shared Hospital Services are on file.