X0407 4 2023-05-01 0 0001577526 C3.ai, Inc. AI 0001031530 SIEBEL THOMAS M C/O C3.AI, INC. 1400 SEAPORT BLVD REDWOOD CITY CA 94603 1 1 1 0 Chief Executive Officer 0 Class A Common Stock 2023-05-01 4 M 0 53125 A 1809515 D Class A Common Stock 2023-05-01 4 F 0 26340 18.63 D 1783175 D Class A Common Stock 2023-05-02 4 G 0 26785 0.00 D 1756390 D Class A Common Stock 2023-05-02 4 G 0 26785 0.00 A 3610679 I See Footnote Class A Common Stock 9216 I See Footnote Class A Common Stock 170294 I See Footnote Class A Common Stock 72695 I See Footnote Class A Common Stock 1237115 I See Footnote Restricted Stock Units 2023-05-01 4 M 0 53125 0.00 D Class A Common Stock 53125 637500 D Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of the Issuer's Class A Common Stock upon settlement. The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee. The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman. The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner. The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner. The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee. 6.25% of each such RSU award vested on August 1, 2022 and 6.25% of each such RSU award shall vest on a quarterly basis thereafter, so long as the Reporting Person continues to provide services through such vesting date. /s/ Eric Jensen, Attorney-in-Fact 2023-05-03