Zscaler, Inc. (ZS) Institutional Ownership

Ownership Summary

The institutional landscape for Zscaler, Inc. (NASDAQ:ZS) includes 888 filers as of the latest reporting cycle ending September 2025.

• These investors collectively held 92.3% of the company's total shares outstanding in September 2025, up from 54.1% in June 2025.
• The company experienced a 72.79% quarterly change in institutional shares held, alongside an increase of 29.45% in total owners annually.
• A review of institutional activity for Zscaler shows 480 of 888 filers increasing their positions, while 273 reduced their stake, and 135 remained unchanged.
• Collectively, institutional investors increased their stake in Zscaler to 143.77Mn shares as of September 2025, a change that is up by 60.57Mn shares quarter on quarter and up 67.72Mn shares year over year.
• As of September 30, 2025, TUDOR INVESTMENT CORP ET AL held Zscaler's largest shareholding position with over 55.44Mn shares, representing 35.61% of total outstanding shares.
• Among the most significant buyers of Zscaler during September 2025 were TUDOR INVESTMENT CORP ET AL (55.42Mn), GROUPAMA ASSET MANAGMENT (4.75Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.08Mn), AQR CAPITAL MANAGEMENT LLC (741.76K), VANGUARD GROUP INC (652.77K).
• Leading sellers of Zscaler stock in September 2025 included UBS Group AG (1.24Mn), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (735.71K), D. E. Shaw & Co., Inc. (645.60K), MILLENNIUM MANAGEMENT LLC (627.56K), TWO SIGMA ADVISERS, LP (547.20K).
• The top 10 institutional holders of Zscaler for the quarter ending September 2025 included TUDOR INVESTMENT CORP ET AL (55.44Mn), VANGUARD GROUP INC (11.37Mn), BlackRock, Inc. (7.79Mn), GROUPAMA ASSET MANAGMENT (4.75Mn), FMR LLC (4.03Mn), GOLDMAN SACHS GROUP INC (2.47Mn), AMERICAN CENTURY COMPANIES INC (2.42Mn), STATE STREET CORP (2.26Mn), T. Rowe Price Investment Management, Inc. (2.26Mn), FIRST TRUST ADVISORS LP (2.23Mn).