On May 27, Zscaler fell 21.28% in pre-market trading, trading at $144.11/share, with trading volume of $3.29 million. The sell-off was triggered by weak fourth-quarter revenue guidance and executive personnel changes disclosed via an 8-K filing alongside the company's fiscal Q3 earnings report.

Zscaler's Q3 results beat expectations, with adjusted EPS of $1.08 versus the $1.01 consensus and revenue of $850 million above the expected $835 million, representing 25.5% year-over-year growth. However, fiscal Q4 revenue guidance of $875-$878 million fell short of the $879 million market estimate, reflecting intensifying cybersecurity competition and increasingly cautious enterprise spending. The simultaneous 8-K filing disclosing executive changes compounded selling pressure.

The guidance miss is particularly notable given that UBS and B. Riley had recently issued bullish ratings with price targets of $260 and $225 respectively, elevating market expectations ahead of the report. Zscaler is a cloud security leader specializing in zero-trust architecture and has recently been expanding into AI security through its acquisition of Symmetry Systems.

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