ZSCALER INC (ZS) Stock Institutional Trading Activity


ZSCALER INC (ZS) 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 Tiger Global Management, Renaissance Technologies LLC, Sequoia Financial Advisors, Viking Global Investors, and ARK Invest. 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 2021Renaissance Technologies LLCSell-195,90067,400$17,674
Q2 2021Renaissance Technologies LLCSell-364,100263,300$56,889
Q1 2021ARK InvestSell-48,761621$107
Q1 2021Renaissance Technologies LLCBuy604,934627,400$107,706
Q4 2020ARK InvestSell-981,48249,382$9,862
Q4 2020Renaissance Technologies LLCSell-150,73422,466$4,487
Q3 2020ARK InvestBuy249,7251,030,864$145,032
Q2 2020ARK InvestBuy672,055781,139$85,535
Q2 2020Renaissance Technologies LLCSell-538,700173,200$18,965
Q1 2020ARK InvestSell-17,255109,084$6,639
Q4 2019ARK InvestBuy126,339126,339$5,875
Q2 2019Renaissance Technologies LLCBuy92,600711,900$54,560
Q1 2019Renaissance Technologies LLCBuy400,800619,300$43,927
Q4 2018Renaissance Technologies LLCBuy211,645218,500$8,567
Q3 2018Renaissance Technologies LLCBuy6,8556,855$280

Frequently asked questions about ZS activity

  • Which institutional owners are buying ZS?

    Institutional owners buying ZS 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 ZS activity?

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

  • Is institutional interest in ZS increasing?

    Institutional interest in ZS 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.