QUALYS INC (QLYS) Stock Institutional Trading Activity


QUALYS INC (QLYS) 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 Fundsmith, Renaissance Technologies LLC, Sequoia Financial Advisors, Alapocas Investment Partners, and Torray Fund. 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
Q1 2020Torray FundBuy3,68018,989$1,652
Q1 2020Renaissance Technologies LLCSell-196,300213,100$18,538
Q4 2019Torray FundSell-3,78215,309$1,276
Q4 2019Renaissance Technologies LLCSell-43,500409,400$34,132
Q3 2019Torray FundBuy3419,091$1,443
Q3 2019Renaissance Technologies LLCBuy54,000452,900$34,226
Q2 2019Torray FundSell-1,54019,057$1,659
Q2 2019Renaissance Technologies LLCSell-230,000398,900$34,736
Q1 2019Torray FundBuy9620,597$1,704
Q1 2019Renaissance Technologies LLCSell-250,100628,900$52,035
Q4 2018Torray FundBuy2,01220,501$1,532
Q4 2018Renaissance Technologies LLCSell-179,600879,000$65,696
Q3 2018Torray FundSell-88218,489$1,647
Q3 2018Renaissance Technologies LLCSell-429,6001,058,600$94,321
Q2 2018Torray FundSell-63419,371$1,633
Q1 2018Torray FundBuy3,82420,005$1,455
Q1 2018Renaissance Technologies LLCBuy187,5001,488,200$108,267
Q4 2017Torray FundBuy3,33116,181$960
Q4 2017Renaissance Technologies LLCBuy185,2001,300,700$77,197
Q3 2017Torray FundSell-1,59412,850$666
Q3 2017Renaissance Technologies LLCBuy92,5001,115,500$57,783
Q2 2017Torray FundSell-2,06914,444$589
Q2 2017Renaissance Technologies LLCBuy105,1001,023,000$41,738
Q1 2017Torray FundSell-15,76616,513$626
Q1 2017Renaissance Technologies LLCBuy186,000917,900$34,788
Q4 2016Torray FundBuy23,64932,279$1,022
Q4 2016Renaissance Technologies LLCBuy116,100731,900$23,165
Q3 2016Renaissance Technologies LLCBuy93,400615,800$23,517
Q2 2016Renaissance Technologies LLCBuy100,000522,400$15,573
Q1 2016Renaissance Technologies LLCBuy321,400422,400$10,691

Frequently asked questions about QLYS activity

  • Which institutional owners are buying QLYS?

    Institutional owners buying QLYS 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 QLYS activity?

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

  • Is institutional interest in QLYS increasing?

    Institutional interest in QLYS 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.