Zscaler Stock Soars on Q4 FY2026 Beat as AI-Driven Security Demand Accelerates

Zscaler reported fourth-quarter and full fiscal year 2026 results on September 3, 2026, with quarterly revenue up 25% year-over-year to $898 million, beating the $877 million analyst estimate. Adjusted earnings per share came in at $1.19 versus $1.09 expected, and the stock rallied on the report as the cloud security company beat estimates across the board.

The Growth and Margin Numbers

• Annual recurring revenue grew 25% alongside revenue, while net new ARR growth accelerated to 17% for the quarter, excluding the Red Canary acquisition
• Operating margin reached a record 24.3% for the quarter, indicating the growth came with improving profitability rather than at its expense
• Full-year fiscal 2027 guidance calls for revenue between $3.91-3.94 billion (above the $3.90 billion estimate) and adjusted EPS of $4.86-4.90 (above the $4.60 estimate)

Why the Company Says Demand Accelerated

Zscaler specifically attributed the acceleration to rising AI-related security risk spurring urgent demand for zero-trust cyber tooling — a demand driver consistent with the broader pattern this week's other security stories illustrate directly: OpenAI's Astra crossing the Critical cyber threshold, Unit 42's account of a 10-hour AI-run ransomware attack, and new survey data showing most enterprises can't currently detect out-of-scope AI agent behavior quickly. Rising AI-driven attack capability appears to be translating into real, measurable security tooling demand, not just industry commentary.

What This Means If You're Evaluating Zero-Trust Security Vendors

The accelerating net-new-ARR growth (17% for the quarter, excluding the Red Canary acquisition) is the more informative number here versus headline revenue growth alone, since it isolates organic new-business momentum from inorganic contribution. For organizations evaluating zero-trust or cloud security vendors, this quarter's results are a useful data point that urgency around AI-driven security risk is translating into real enterprise spending decisions right now, not a future consideration to defer.