Form 4 Filing by Thomas M. Siebel

This filing details transactions by Thomas M. Siebel, CEO and Chairman of the Board of C3.ai, Inc. (AI), on September 30, 2026. Siebel acquired 956 shares of Class A Common Stock through various investment vehicles, including RS DE Investments LLC, CS DE Investments LLC, TS DE Investments LLC, and HS DE Investments LLC. These transactions were non-derivative, with a reported price of $0.00 per share. The filing also reports the acquisition of 431,172 shares of Class B Common Stock, convertible into Class A Common Stock, acquired through similar entities. Post-transaction, Siebel directly holds 722,362 shares of Class A Common Stock and indirectly holds a significant number of Class A and Class B shares through various trusts and LLCs, including over 7.1 million shares of Class A Common Stock noted as "See Footnote" and over 2 million shares of Class B Common Stock. Some transactions involved changes in beneficial ownership exempt under Rule 16a-13.