Summary List Placement C3.ai, the AI startup founded and led by billionaire Tom Siebel, filed the paperwork for a potential IPO on Friday — a listing that would make it one of the relative few public companies in the space. Siebel himself is best-known as the founder of Siebel Systems, a one-time titan in the customer relationship management (CRM) space that was purchased by Oracle for $5.8 billion in 2005. The company's filing with the Securities and Exchange Commission shows that it posted revenues of $156 million for the fiscal year that ended in April, growing 71% over the year prior.