AMERICAN SHARED HOSPITAL SER (AMS) Institutional Ownership Changes & 13F Activity

AMERICAN SHARED HOSPITAL SER (AMS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-20049,200$71,340
Q4 2025Renaissance Technologies LLCSell-40049,400$104,234
Q3 2025Renaissance Technologies LLCSell-16,90049,800$139,440
Q2 2025Renaissance Technologies LLCSell-3,20066,700$160,747
Q1 2025Renaissance Technologies LLCSell-1,32569,900$194,322
Q4 2024Renaissance Technologies LLCBuy3,77671,225$227,208
Q3 2024Renaissance Technologies LLCBuy11,94867,449$205,719
Q2 2024Renaissance Technologies LLCBuy13,20155,501$177,326
Q1 2024Renaissance Technologies LLCBuy6,80042,300$125
Q4 2023Renaissance Technologies LLCSell-24,48835,500$84
Q3 2023Renaissance Technologies LLCSell-14,80759,988$148
Q2 2023Renaissance Technologies LLCBuy29,59574,795$191
Q1 2023Renaissance Technologies LLCBuy19,20045,200$127
Q4 2022Renaissance Technologies LLCBuy6,67926,000$76
Q3 2022Renaissance Technologies LLCBuy4,02119,321$50
Q2 2022Renaissance Technologies LLCBuy3,00015,300$34
Q1 2022Renaissance Technologies LLCSell-1,40012,300$29
Q4 2021Renaissance Technologies LLCBuy2,20013,700$32
Q3 2021Renaissance Technologies LLCSell-37,80011,500$32
Q1 2021Renaissance Technologies LLCBuy1,00049,300$137
Q4 2020Renaissance Technologies LLCBuy32,10048,300$107
Q3 2019Renaissance Technologies LLCBuy10016,200$41
Q2 2019Renaissance Technologies LLCSell-3,10016,100$46
Q1 2019Renaissance Technologies LLCBuy1919,200$53
Q4 2018Renaissance Technologies LLCSell-10,71919,181$46
Q3 2018Renaissance Technologies LLCSell-8,05029,900$105
Q1 2018Renaissance Technologies LLCSell-16,45037,950$97
Q4 2017Renaissance Technologies LLCSell-13,39054,400$141
Q3 2017Renaissance Technologies LLCSell-4,21067,790$193
Q2 2017Renaissance Technologies LLCBuy40,80072,000$281

Frequently asked questions about AMS activity

  • Which institutional owners are buying AMS?

    Institutional owners buying AMS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AMS activity?

    "Buy" means an investor increased their reported position in AMS compared to the prior reporting period. This reflects growing exposure to AMERICAN SHARED HOSPITAL SER (AMS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AMS increasing?

    Institutional interest in AMS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

Related AMS Institutional Insights