LUCID DIAGNOSTICS INC (LUCD) Stock Institutional Trading Activity


LUCID DIAGNOSTICS INC (LUCD) 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 LLCBuy532,894826,527$900,914
Q3 2025Renaissance Technologies LLCBuy50,354293,633$296,569
Q2 2025Renaissance Technologies LLCSell-215,786243,279$279,771
Q1 2025Renaissance Technologies LLCBuy439,065459,065$684,007
Q4 2021Renaissance Technologies LLCBuy20,00020,000$107

Frequently asked questions about LUCD activity

  • Which institutional owners are buying LUCD?

    Institutional owners buying LUCD 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 LUCD activity?

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

  • Is institutional interest in LUCD increasing?

    Institutional interest in LUCD 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.