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

73500 809970 137253289 02/02/2026 NYSE Class A Common Stock 02/02/2026 RSU Vest Issuer N 73500 02/02/2026 NA N Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 11/03/2025 27545 476570 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 12/02/2025 17000 241595 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 12/12/2025 23000 366726 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 01/13/2026 212586 2873631 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 11/11/2025 543706 8286460 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 12/16/2025 392064 5633528 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 This filing is for a sale of shares to cover taxes for Restricted Stock Units (RSUs) that will be acquired by the seller on 02/02/2026 (29,854 Shares) , 03/01/2026 ( 18,395 Shares) and on 03/11/2026 (25,251 Shares). 02/02/2026 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Thomas M. Siebel.