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

1386127 21484968 134349704 11/11/2025 NYSE Class A Common Stock 08/30/2024 Stock Option Exercise Issuer N 537634 08/30/2024 Cash Class A Common Stock 02/12/2020 Founder Shares Issuer N 848493 02/12/2020 NA N Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 09/02/2025 17200 283631 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 09/12/2025 92000 1502250 Thomas M. Siebel

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 11/03/2025 27545 476570 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 08/12/2025 577678 9694361 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 09/16/2025 566125 9755065 Siebel Living Trust

1400 SEAPORT BLVD REDWOOD CITY CA 94063

Class A Common Stock 10/14/2025 554802 10441147 The shares filed today will be sold by the Siebel Living Trust , Thomas M. Siebel as Trustee. Sales that were executed on 11/11/2025 are being reported on this Form 144 filed on 11/12/2025 given the EDGAR system was not accepting filings on 11/11/2025 in observance of the federal holiday Veteran's Day ( November 11, 2025). 11/12/2025 09/20/2024 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Thomas M. Siebel.