C3.ai 4: CEO's $5.1M cashless sale (Oct 14, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-13 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: C3.ai, Inc. (AI) CIK: 0001577526 --- Reporting Owner --- Name: SIEBEL THOMAS M CIK: 0001031530 Role: Director, Officer (CEO and Chairman of the Board), 10%+ Owner --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-10-13 | Code: M (Exercise of derivative) Shares: +435,363 | Price: $3.90 Total Value: $1,697,915.70 Shares Owned After: 1,157,725 | Ownership: D (Direct) Footnotes: [F1] The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024. [Transaction #2] Security: Class A Common Stock Date: 2026-10-13 | Code: S (Open market sale) Shares: -435,363 | Price: $11.82 Total Value: $5,145,076.40 Shares Owned After: 722,362 | Ownership: D (Direct) Footnotes: [F1] The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024. [F2] The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $11.565 to $12.0123, inclusive. The Reporting Person will provide upon request to the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price. --- Derivative Transactions --- [Transaction #1] Security: Stock Option (Right to Buy) Date: 2026-10-13 | Code: M (Exercise of derivative) Shares: -435,363 | Price: $0.00 Exercise Price: $3.90 Exercisable: N/A | Expires: 2028-11-27 Shares Owned After: 1,533,585 | Ownership: D (Direct) Footnotes: [F1] The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024. [F8] Fully vested. --- Holdings --- [Holding #1] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F3] The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee. [Holding #2] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F4] The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is trustee. [Holding #3] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F5] The shares are held by HS ET DE Investments LLC, of which the Reporting Person is the manager. [Holding #4] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F6] The shares are held by Siebel Legacy Investments I LLC, of which the Reporting Person is the manager. [Holding #5] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F7] The shares are held by Siebel Legacy Investments II LLC, of which the Reporting Person is the manager. --- Footnotes (Complete Index) --- F1: The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024. F2: The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $11.565 to $12.0123, inclusive. The Reporting Person will provide upon request to the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price. F3: The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee. F4: The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is trustee. F5: The shares are held by HS ET DE Investments LLC, of which the Reporting Person is the manager. F6: The shares are held by Siebel Legacy Investments I LLC, of which the Reporting Person is the manager. F7: The shares are held by Siebel Legacy Investments II LLC, of which the Reporting Person is the manager. F8: Fully vested. --- Signature --- /s/ /s/ Tom MacMitchell, Attorney-in-Fact (2026-10-14)