X0306 4 2021-12-23 0 0001577526 C3.ai, Inc. AI 0001218471 ABBO EDWARD Y C/O C3.AI, INC. 1300 SEAPORT BLVD, SUITE 500 REDWOOD CITY CA 94063 0 1 0 0 Chief Technology Officer Class A Common Stock 2021-03-08 4 G 0 3000 0.00 D 56415 D Class A Common Stock 2021-08-16 4 G 0 99137 0.00 D 0 I See Footnote Class A Common Stock 2021-08-16 4 G 0 99137 0.00 A 155552 D Class A Common Stock 2021-12-23 4 M 0 13238 2.82 A 168790 D Class A Common Stock 2021-12-23 4 M 0 21929 4.56 A 190719 D Class A Common Stock 2021-12-23 4 M 0 21929 4.56 A 212648 D Class A Common Stock 149577 I See Footnote Class A Common Stock 149578 I See Footnote Class A Common Stock 149578 I See Footnote Stock Option (Right to Buy) 34.25 2021-12-23 4 A 0 300000 0.00 A 2031-12-22 Class A Common Stock 300000 300000 D Stock Option (Right to Buy) 2.82 2021-12-23 4 M 0 13238 0.00 D 2028-05-22 Class A Common Stock 13238 47874 D Stock Option (Right to Buy) 4.56 2021-12-23 4 M 0 21929 0.00 D 2029-06-12 Class A Common Stock 21929 144738 D Stock Option (Right to Buy) 4.56 2021-12-23 4 M 0 21929 0.00 D 2030-07-05 Class A Common Stock 21929 144738 D The shares are held by the Edward Y. Abbo and Alison C. Abbo 2001 Family Trust, of which the Reporting Person is trustee. The shares were received in connection with the division of the Abbo 2012 Children's Trust. The shares are held by the Abbo 2012 Children's Trust FBO Casey Cecile Abbo, of which the Reporting Person is trustee. The shares were received in connection with the division of the Abbo 2012 Children's Trust. The shares are held by the Abbo 2012 Children's Trust FBO Dana Lauren Abbo, of which the Reporting Person is trustee. The shares were received in connection with the division of the Abbo 2012 Children's Trust. The shares are held by the Abbo 2012 Children's Trust FBO Layla Grace Abbo, of which the Reporting Person is trustee. Twenty percent (20%) of the shares subject to the option grant shall vest on December 15, 2022, and the remaining eighty percent (80%) of each such grant vests on a monthly basis for the following four years, so long as the Reporting Person continues to provide services through such vesting dates. Twenty percent (20%) of the shares subject to the option grant vested on May 23, 2019, and the remaining eighty percent (80%) of each such grant vests on a monthly basis for the following four years, so long as the Reporting Person continues to provide services through such vesting dates. Due to rounding in connection with the reverse stock split, the total shares include 2 additional shares that were not originally reported on the Reporting Person's Form 3. Twenty percent (20%) of the shares subject to the option grant vested on May 1, 2020, and the remaining eighty percent (80%) of each such grant vests on a monthly basis for the following four years, so long as the Reporting Person continues to provide services through such vesting dates. Due to rounding in connection with the reverse stock split, the total shares include 1 additional share that was not originally reported on the Reporting Person's Form 3. Twenty percent (20%) of the shares subject to the option grant vest on May 1, 2021, and the remaining eighty percent (80%) of each such grant vests on a monthly basis for the following four years, so long as the Reporting Person continues to provide services through such vesting dates. /s/ Richard J. Lutton, Jr., Attorney-in-Fact 2021-12-28