ALTIMMUNE INC (ALT) Stock Institutional Trading Activity


ALTIMMUNE INC (ALT) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include Sequoia Financial Advisors and 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
Q3 2025Sequoia Financial AdvisorsBuy1,91912,074$45,519
Q1 2025Sequoia Financial AdvisorsSell-3,50010,155$50,775
Q4 2024Sequoia Financial AdvisorsBuy3,50013,655$98,453
Q1 2024Sequoia Financial AdvisorsBuy10,15510,155$103,378
Q3 2023Renaissance Technologies LLCSell-327,800330,900$860
Q2 2023Renaissance Technologies LLCBuy382,400658,700$2,325
Q1 2023Renaissance Technologies LLCSell-231,700276,300$1,166
Q4 2022Renaissance Technologies LLCSell-490,200508,000$8,357
Q3 2022Renaissance Technologies LLCBuy332,800998,200$12,747
Q2 2022Renaissance Technologies LLCBuy276,700665,400$7,785
Q1 2022Renaissance Technologies LLCBuy321,900388,700$2,367
Q4 2021Renaissance Technologies LLCSell-957,70766,800$612
Q3 2020Renaissance Technologies LLCBuy98,8001,024,507$13,523
Q2 2020Renaissance Technologies LLCBuy308,700925,707$9,914
Q1 2020Renaissance Technologies LLCBuy443,656617,007$1,981
Q4 2019Renaissance Technologies LLCBuy129,736173,351$328
Q3 2019Renaissance Technologies LLCSell-65,69143,615$85
Q1 2019Renaissance Technologies LLCSell-85,200109,306$317
Q4 2018Renaissance Technologies LLCBuy152,205194,506$401
Q3 2018Renaissance Technologies LLCBuy42,30142,301$186

Frequently asked questions about ALT activity

  • Which institutional owners are buying ALT?

    Institutional owners buying ALT 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 ALT activity?

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

  • Is institutional interest in ALT increasing?

    Institutional interest in ALT 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.