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United States-based Zscaler, a cloud-delivered security services provider, saw its shares plunge 31.52 percent on Wednesday, the steepest single-day decline in its history, closing at $126.41 and cutting its market capitalization to about $20.33 billion. The selloff followed fiscal third-quarter 2026 results that beat expectations, with revenue rising 25 percent year over year to $850.5 million and adjusted earnings per share reaching $1.08. Investor focus shifted rapidly from the stronger-than-expected quarter to management’s new fiscal 2027 outlook, which calls for annualized recurring and total revenue growth to slow sharply to 16–17 percent, a marked deceleration from Zscaler’s earlier high-growth profile. United States markets also reacted to Zscaler’s decision to slash its full-year free cash flow margin guidance to 22.8–23.3 percent from a prior range of 26.5–27 percent, a reduction the company linked to higher capital expenditures for infrastructure and artificial intelligence-focused zero-trust deployments. The company forecast fiscal fourth-quarter revenue of $875–$878 million, with the top end slightly below Wall Street consensus, and the guidance prompted at least 22 brokerages to cut price targets, including a downgrade by Evercore ISI to In Line. The historic drop in Zscaler’s stock weighed on cybersecurity peers such as Palo Alto Networks and CrowdStrike, while coming despite recent acquisitions, new AI security initiatives, and a three-month period in which insiders sold $2.4 million of stock and made no open-market purchases.

Prepared by Christopher Adams and reviewed by editorial team.