C3.ai CEO Thomas Siebel Sells Over 444,000 Shares Worth $4.8 Million After a 40% Decline in the Stock

C3.ai CEO Thomas Siebel sold approximately 444,000 shares worth $4.8 million on September 15-16, 2026, through a pre-established Rule 10b5-1 trading plan. The sale occurred after the stock declined 40% over the past year, though Siebel maintains millions of shares through direct and indirect holdings. Despite the stock decline during his health-related absence in 2025, the company showed signs of recovery with a 73% quarter-over-quarter increase in customer bookings after his return in June.