ATOSSA THERAPEUTICS INC (ATOS) Stock Institutional Trading Activity


ATOSSA THERAPEUTICS INC (ATOS) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCBuy514,1752,062,838$1,217,074
Q3 2025Renaissance Technologies LLCSell-263,5881,548,663$1,342,691
Q2 2025Renaissance Technologies LLCSell-42,8501,812,251$1,504,168
Q1 2025Renaissance Technologies LLCBuy297,4691,855,101$1,248,297
Q4 2024Renaissance Technologies LLCBuy247,5621,557,632$1,470,560
Q3 2024Renaissance Technologies LLCSell-240,8401,310,070$1,991,306
Q2 2024Renaissance Technologies LLCBuy164,5401,550,910$1,845,583
Q1 2024Renaissance Technologies LLCBuy102,1001,386,370$2,495
Q4 2023Renaissance Technologies LLCBuy41,9001,284,270$1,130
Q3 2023Renaissance Technologies LLCBuy168,3001,242,370$915
Q2 2023Renaissance Technologies LLCBuy138,0001,074,070$1,353
Q1 2023Renaissance Technologies LLCBuy91,300936,070$679
Q4 2022Renaissance Technologies LLCSell-250,940844,770$446
Q3 2022Renaissance Technologies LLCSell-894,2851,095,710$913
Q2 2022Renaissance Technologies LLCSell-110,4971,989,995$2,169
Q1 2022Renaissance Technologies LLCBuy930,1522,100,492$2,626
Q4 2021Renaissance Technologies LLCSell-2,133,8001,170,340$1,873
Q1 2021Renaissance Technologies LLCBuy2,811,3403,304,140$6,972
Q4 2020Renaissance Technologies LLCBuy418,320492,800$468
Q3 2020Renaissance Technologies LLCBuy48,28074,480$180
Q4 2019Renaissance Technologies LLCBuy26,20026,200$41

Frequently asked questions about ATOS activity

  • Which institutional owners are buying ATOS?

    Institutional owners buying ATOS 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 ATOS activity?

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

  • Is institutional interest in ATOS increasing?

    Institutional interest in ATOS 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.