144 0001031530 XXXXXXXX LIVE 0001577526 C3.ai, Inc. 001-39744 1400 SEAPORT BLVD REDWOOD CITY CA 94063 650-503-2200 Thomas M. Siebel Officer and Director Class A Common J.P. Morgan Securities LLC 270 Park Avenue 10th Floor New York NY 10017 74000 677840 141791230 05/04/2026 NYSE Class A Common Stock 05/04/2026 RSU Vest Issuer N 74000 05/04/2026 NA N Thomas M. Siebel 1400 SEAPORT BLVD REDWOOD CITY CA 94063 Class A Common Stock 03/02/2026 17655 137607 Thomas M. Siebel 1400 SEAPORT BLVD REDWOOD CITY CA 94063 Class A Common Stock 03/12/2026 23435 213455 Thomas M. Siebel 1400 SEAPORT BLVD REDWOOD CITY CA 94063 Class A Common Stock 03/17/2026 282203 2500996 Thomas M. Siebel 1400 SEAPORT BLVD REDWOOD CITY CA 94063 Class A Common Stock 03/18/2026 219294 1900204 Thomas M. Siebel 1400 SEAPORT BLVD REDWOOD CITY CA 94063 Class A Common Stock 04/13/2026 326189 2711055 Thomas M. Siebel 1400 SEAPORT BLVD REDWOOD CITY CA 94063 Class A Common Stock 04/14/2026 165278 1403706 This filing is for a sale of shares to cover taxes for Restricted Stock Units (RSUs) that will be acquired by the seller on 05/01/2026 , 06/01/2026 and on 06/11/2026. 05/04/2026 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Thomas M. Siebel.