American Shared Hospital Services

AMS

Exchange: NYSE
Industry: Services-Medical Laboratories
SEC CIK: 0000744825

SEC filings (opens in a new tab)

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.

Q1 2023 vs. Q4 2022

How the institutions holding American Shared Hospital Services changed between Q4 2022 and Q1 2023.

All holders in Q1 2023 All holders in Q4 2022

13F holders of AMS: Q4 2022 compared with Q1 2023
Measure	Q4 2022	Q1 2023	Change
Holders	18	20	+2
Shares	1.05M	1.10M	+48.4K (+4.6%)
Value	$3.06M	$3.09M	+$25.0K (+0.8%)

New holders (3)

Institutions that held American Shared Hospital Services at the end of Q1 2023 but not at the end of Q4 2022.

Institutions new to AMS in Q1 2023
Institution	Shares	Value	% of portfolio
Citadel Advisors LLC	13,842	$38.9K	0.00%
Tower Research Capital LLC (TRC)	3,302	$9.00K	0.00%
Royal Bank of Canada	9	$0	0.00%

Sold out (1)

Institutions that held American Shared Hospital Services at the end of Q4 2022 and filed for Q1 2023 without it.

Institutions that sold out of AMS in Q1 2023
Institution	Shares, Q4 2022	Value, Q4 2022
BlackRock Inc.	709	$2.08K