C3.ai stock sank today after the company announced that CEO Tom Siebel will be stepping down.C3.ai (AI -10.82%) stock got hit with big sell-offs today after the company announced a major leadership change. The company's share price ended the daily session down 10.8%C3.ai announced today that CEO Tom Siebel would be stepping down and that the company was in the process of looking for its next chief executive. With today's pullback, the company's stock is down roughly 24.5% across 2025's trading. C3.ai stock ...