X0306 4 2020-08-27 0 0001577526 C3.ai, Inc. AI 0001031530 SIEBEL THOMAS M C/O C3.AI, INC. 1300 SEAPORT BLVD, SUITE 500 REDWOOD CITY CA 94603 1 1 1 0 Chief Executive Officer 0001834425 Siebel Living Trust u/a/d 7/27/93, as amended C/O C3.AI, INC. 1300 SEAPORT BLVD, SUITE 500 REDWOOD CITY CA 94063 0 0 1 0 Class A Common Stock 2020-12-11 4 C 0 5988974 A 10722144 I See Footnote Stock Option (Right to Buy) 11.16 2020-08-27 4 A 0 6166666 0.00 A 2030-08-26 Class A Common Stock 6166666 6166666 D Class A-1 Common Stock 2020-12-11 4 C 0 5988974 0.00 D Class A Common Stock 5988974 0 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 2030288 0.00 D Class B Common Stock 2030288 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 2030288 0.00 A Class A Common Stock 2030288 2030288 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 500000 0.00 D Class B Common Stock 500000 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 500000 0.00 A Class A Common Stock 500000 500000 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 43378 0.00 D Class B Common Stock 43378 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 43378 0.00 A Class A Common Stock 43378 43378 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 43378 0.00 D Class B Common Stock 43378 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 43378 0.00 A Class A Common Stock 43378 43378 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 82582 0.00 D Class B Common Stock 82582 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 82582 0.00 A Class A Common Stock 82582 82582 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 82582 0.00 D Class B Common Stock 82582 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 82582 0.00 A Class A Common Stock 82582 82582 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 23914 0.00 D Class B Common Stock 23914 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 23914 0.00 A Class A Common Stock 23914 23914 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 23914 0.00 D Class B Common Stock 23914 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 23914 0.00 A Class A Common Stock 23914 23914 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 18623 0.00 D Class B Common Stock 18623 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 18623 0.00 A Class A Common Stock 18623 18623 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 18623 0.00 D Class B Common Stock 18623 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 18623 0.00 A Class A Common Stock 18623 18623 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 19009 0.00 D Class B Common Stock 19009 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 19009 0.00 A Class A Common Stock 19009 19009 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 19009 0.00 D Class B Common Stock 19009 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 19009 0.00 A Class A Common Stock 19009 19009 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 10250 0.00 D Class B Common Stock 10250 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 10250 0.00 A Class A Common Stock 10250 10250 I See Footnote Series A* Convertible Preferred 2020-12-11 4 C 0 10250 0.00 D Class B Common Stock 10250 0 I See Footnote Class B Common Stock 2020-12-11 4 C 0 10250 0.00 A Class A Common Stock 10250 10250 I See Footnote Immediately upon the closing of the Issuer's initial public offering, all shares of Class A-1 Common Stock automatically converted into shares of Class A Common Stock and had no expiration date. The shares are held by The Siebel Living Trust u/a/d 7/27/93, a amended, of which the Reporting Person is trustee. The options vest on an equal quarterly basis over the five (5) year period following August 28, 2020, so long as the Reporting Person continues to provide services through such vesting dates. Fully vested. Immediately upon the closing of the Issuer's initial public offering, all shares of Series A* Convertible Preferred Stock automatically converted into shares of Class B Common Stock and had no expiration date. The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman. The shares are held by The Siebel 2013 Annuity Trust I u/a/d 10/8/2013, of which the Reporting Person is the trustee. The shares are held by The Siebel 2013 Annuity Trust II u/a/d 10/8/2013, of which the Reporting Person is the trustee. The shares are held by The Siebel 2014 Annuity Trust I u/a/d 10/22/2014, of which the Reporting Person is the trustee. The shares are held by The Siebel 2014 Annuity Trust II u/a/d 10/22/2014, of which the Reporting Person is the trustee. The shares are held by The Siebel 2017 Annuity Trust I u/a/d 11/28/2017, of which the Reporting Person is the trustee. The shares are held by The Siebel 2017 Annuity Trust II u/a/d 11/28/2017, of which the Reporting Person is the trustee. The shares are held by The Siebel 2018 Annuity Trust I u/a/d 12/13/2018, of which the Reporting Person is the trustee. The shares are held by The Siebel 2018 Annuity Trust II u/a/d 12/13/2018, of which the Reporting Person is the trustee. The shares are held by The Siebel 2020 Annuity Trust I u/a/d 3/4/2020, of which the Reporting Person is the trustee. The shares are held by The Siebel 2020 Annuity Trust II u/a/d 3/4/2020, of which the Reporting Person is the trustee. The shares are held by The Siebel 2020 Annuity Trust III u/a/d 12/3/2020, of which the Reporting Person is the trustee. The shares are held by The Siebel 2020 Annuity Trust IV u/a/d 12/3/2020, of which the Reporting Person is the trustee. One of two filings made for the Reporting Persons. /s/ Brady Mickelsen, Attorney-in-Fact 2020-12-11 /s/ Brady Mickelsen, Attorney-in-Fact 2020-12-11