ACTINIUM PHARMACEUTICALS INC (ATNM) Institutional Ownership Changes & 13F Activity

ACTINIUM PHARMACEUTICALS INC (ATNM) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). 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 LLCBuy80,816471,600$469,383
Q4 2025Renaissance Technologies LLCBuy102,154390,784$531,466
Q3 2025Renaissance Technologies LLCBuy79,129288,630$461,808
Q2 2025Renaissance Technologies LLCBuy151,901209,501$293,301
Q1 2025Renaissance Technologies LLCSell-132,80057,600$92,736
Q4 2024Renaissance Technologies LLCBuy63,400190,400$239,904
Q3 2024Renaissance Technologies LLCBuy107,800127,000$238,760
Q2 2024Renaissance Technologies LLCSell-29,10219,200$142,080
Q2 2023Renaissance Technologies LLCSell-53,89848,302$358
Q1 2023Renaissance Technologies LLCSell-57,400102,200$966
Q4 2022Renaissance Technologies LLCBuy81,300159,600$1,700
Q3 2022Renaissance Technologies LLCBuy20,60078,300$578
Q2 2022Renaissance Technologies LLCBuy57,70057,700$278

Frequently asked questions about ATNM activity

  • Which institutional owners are buying ATNM?

    Institutional owners buying ATNM 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 ATNM activity?

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

  • Is institutional interest in ATNM increasing?

    Institutional interest in ATNM 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.

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