ServiceNow shares plunge 27% to worst day ever after earnings revive AI disruption fears

ServiceNow shares sank 27% on Thursday, the worst single-day drop in the company's history, after third-quarter results underwhelmed investors and reignited fears that artificial intelligence will disrupt enterprise software.

The move marks a record loss for the enterprise software company. A 27% single-session decline erases more than a quarter of the stock's value in one day, a magnitude that typically signals a broad reassessment of the growth story rather than a routine earnings miss.

CNBC reported that the quarterly results fell short of expectations, and that the reaction was tied directly to renewed concern over AI disruption. Interpretation: the market appears to be pricing the risk that AI could pressure the business models of established software vendors, and ServiceNow's report did little to counter that narrative. The scale of the selloff suggests investors read the quarter as confirmation of that worry rather than an isolated stumble.

For active traders, a record one-day decline often brings elevated volatility, heavy volume, and sharp two-way moves in the sessions that follow. Peers in enterprise software may also trade in sympathy as the AI disruption theme gets repriced across the group.