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

1946607 17130141 141791230 03/17/2026 NYSE Class A Common Stock 11/08/2017 NQ Option Issuer N 1946607 11/08/2017 NA N Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 01/13/2026 212586 2873631 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 02/02/2026 27605 298365.99 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 02/10/2026 511732 5966948.64 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 03/02/2026 17655 137606.6 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 03/12/2026 23435 213454.49 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 12/17/2025 140768 2001496 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 01/13/2026 309589 4184869 03/17/2026 09/20/2024 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Thomas M. Siebel.