ATRICURE INC (ATRC) Stock Institutional Trading Activity


ATRICURE INC (ATRC) 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 LLCBuy63,100321,900$12,734,364
Q3 2025Renaissance Technologies LLCSell-118,900258,800$9,122,700
Q2 2025Renaissance Technologies LLCBuy69,800377,700$12,377,229
Q1 2025Renaissance Technologies LLCBuy144,000307,900$9,932,854
Q4 2024Renaissance Technologies LLCBuy65,800163,900$5,008,784
Q3 2024Renaissance Technologies LLCSell-73,60098,100$2,750,724
Q2 2024Renaissance Technologies LLCBuy19,500171,700$3,909,609
Q1 2024Renaissance Technologies LLCBuy57,900152,200$4,630
Q4 2023Renaissance Technologies LLCSell-47,10094,300$3,366
Q3 2023Renaissance Technologies LLCBuy44,600141,400$6,193
Q2 2023Renaissance Technologies LLCSell-37,90096,800$4,778
Q1 2023Renaissance Technologies LLCBuy35,900134,700$5,583
Q4 2022Renaissance Technologies LLCSell-11,00098,800$4,385
Q3 2022Renaissance Technologies LLCBuy29,700109,800$4,293
Q2 2022Renaissance Technologies LLCBuy14,90080,100$3,273
Q3 2021Renaissance Technologies LLCSell-3,40065,200$4,535
Q2 2021Renaissance Technologies LLCBuy47,70068,600$5,442
Q4 2020Renaissance Technologies LLCSell-550,47520,900$1,164
Q3 2020Renaissance Technologies LLCSell-102,100571,375$22,798
Q2 2020Renaissance Technologies LLCBuy138,975673,475$30,273
Q1 2020Renaissance Technologies LLCBuy211,300534,500$17,954
Q4 2019Renaissance Technologies LLCBuy115,700323,200$10,507
Q3 2019Renaissance Technologies LLCBuy32,259207,500$5,175
Q2 2019Renaissance Technologies LLCBuy45,541175,241$5,229
Q1 2019Renaissance Technologies LLCBuy99,500129,700$3,475
Q4 2018Renaissance Technologies LLCBuy8,60030,200$924
Q3 2018Renaissance Technologies LLCSell-42,20021,600$757
Q1 2018Renaissance Technologies LLCSell-12,22963,800$1,309
Q4 2017Renaissance Technologies LLCBuy51,42976,029$1,387
Q3 2017Renaissance Technologies LLCSell-32,60024,600$550

Frequently asked questions about ATRC activity

  • Which institutional owners are buying ATRC?

    Institutional owners buying ATRC 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 ATRC activity?

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

  • Is institutional interest in ATRC increasing?

    Institutional interest in ATRC 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.