Zscaler ZS Insider Ownership

Updated Nov 4, 2026

Across the past 12 months, Zscaler insiders made no open-market purchases, and sold at least $18.1 million of stock on the open market (97.47K shares).

• Behind Zscaler's open-market sales in the past 12 months were 6 insiders, and no insider bought.
• Adam Geller (Chief Product Officer) was the top open-market seller of Zscaler over the past 12 months, with $8.33 million sold (39.68K shares) and the latest sale on November 2, 2026.
• In transactions other than open-market trades, Zscaler insiders received 50.29K shares in stock awards and acquired 26.04K shares through option exercises and conversions over the past 12 months.
• Per Business Quant, ZS insiders together hold 30.31Mn shares based on their latest Form 4 filings, up 0.13% from 30.27Mn shares at the end of Q2 2026 and down 2.02% from 30.94Mn shares at the end of Q3 2025.
• Zscaler insiders hold 1.07Mn shares directly (3.52% of their total) and 29.24Mn shares (96.48%) indirectly, through entities such as trusts and partnerships.
• Business Quant counts 13 insiders with holdings in Zscaler stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Zscaler's three biggest insider holders are Jagtar Singh Chaudhry (CEO & Chairman, 26.87Mn shares), Ajay Mangal (10% owner, 2.55Mn shares) and Charles H. Giancarlo (Director, 288.27K shares), based on their latest Form 4 filings.
• The holding of Jagtar Singh Chaudhry makes up 88.63% of all shares held by Zscaler insiders.
• Institutions held 51.44% of Zscaler's outstanding shares in their Q2 2026 13F filings, insiders about 18.59% based on their latest Form 4 filings, and other investors, including the public, the remaining 29.97%.
• Over the trailing 12 months, 13 insiders reported transactions in ZS stock across 48 Form 4 filings.
• The insider data for ZS reflects Form 4 filings through November 3, 2026.