C3.ai Shares Plunge 25.58% Amid 660.79% Surge in $1.09B Volume Ranking 71st as Earnings Miss Sparks Leadership Turmoil

C3.ai (AI) plummeted 25.58% on August 11, 2025, with a trading volume of $1.09 billion—surging 660.79% from the previous day—ranking it 71st in market activity. The decline followed the company’s preliminary earnings report, which revealed a significant revenue shortfall attributed to founder Tom Siebel’s health issues and leadership transitions. Siebel, who announced his step-down due to an autoimmune condition weeks earlier, described the results as “completely unacceptable,” citing his inability to actively drive sales for the AI-focused software firm.

Analysts highlighted the challenges facing C3.ai. Wedbush’s Dan Ives warned of “darker days” if the company fails to reverse its trajectory, while Bloomberg Intelligence’s Sunil Rajgopal noted the results could accelerate a strategic reevaluation. The stock, once buoyed by early Wall Street enthusiasm for AI, has struggled to secure major contracts, exacerbating investor concerns. Leadership changes in the sales division further underscored uncertainty ahead of a potential successor search for Siebel.

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