SIEBEL THOMAS M 4
4 · C3.ai, Inc. · Filed Mar 19, 2026
Research Summary
AI-generated summary of this filing
C3.ai (AI) 10% Owner Thomas Siebel Sells Shares After Exercising Options
What Happened
Thomas M. Siebel, a 10% owner of C3.ai (AI), exercised options to acquire a total of 501,497 shares (282,203 on 2026-03-17 and 219,294 on 2026-03-18) at $2.04 per share (total exercise cost $1,023,054) and then sold those same shares in open-market transactions for a combined ~$4,401,598 (weighted-average sale prices: $8.86 on 3/17 and $8.67 on 3/18). The transactions were effected under a previously established Rule 10b5-1 trading plan. Net proceeds before fees/taxes were about $3,378,544.
Key Details
- Filing date: 2026-03-19; Reported period: 2026-03-17 (transactions occurred 2026-03-17 and 2026-03-18).
- Exercises (M):
- 3/17/2026: 282,203 shares exercised at $2.04 — $575,694 (then converted to common shares).
- 3/18/2026: 219,294 shares exercised at $2.04 — $447,360 (then converted to common shares).
- Sales (S):
- 3/17/2026: 282,203 shares sold — weighted-average $8.86; total $2,500,319 (sales ranged $8.66–$8.975) [F2].
- 3/18/2026: 219,294 shares sold — weighted-average $8.67; total $1,901,279 (sales ranged $8.56–$8.83) [F3].
- Derivative conversion entries show the exercised options converted to common shares (reported as $0 disposed for the derivative instrument).
- Shares held by related entities/trusts: The Siebel Living Trust, First Virtual Holdings, LLC, Siebel Asset Management, L.P., Siebel Asset Management III, L.P., and The Siebel 2011 Irrevocable Children's Trust [F4–F8]. Options were fully vested [F9].
- Transactions were pursuant to a 10b5-1 trading plan dated Sept 20, 2024 [F1].
- Shares owned after the transactions are not specified in the provided filing excerpt.
- Filing timeliness: filed on 3/19 for trades on 3/17–3/18; no late-filing flag indicated in the provided data.
Context
This was an exercise-and-sell sequence (options exercised and resulting shares sold in the market), a common way for insiders to monetize vested options. The 10b5-1 plan indicates sales were pre-arranged, which can reduce the implication that the sales were based on nonpublic company information. As a 10% owner (and trustee/chairman/general partner of entities holding shares), Siebel's transactions reflect holdings across affiliated trusts and entities rather than a simple individual open-market trade.
Insider Transaction Report
- Exercise/Conversion
Class A Common Stock
[F1]2026-03-17$2.04/sh+282,203$575,694→ 1,004,565 total - Sale
Class A Common Stock
[F1][F2]2026-03-17$8.86/sh−282,203$2,500,319→ 722,362 total - Exercise/Conversion
Class A Common Stock
[F1]2026-03-18$2.04/sh+219,294$447,360→ 941,656 total - Sale
Class A Common Stock
[F1][F3]2026-03-18$8.67/sh−219,294$1,901,279→ 722,362 total - Exercise/Conversion
Stock Option (Right to Buy)
[F1][F9]2026-03-17−282,203→ 1,993,479 totalExercise: $2.04Exp: 2027-11-07→ Class A Common Stock (282,203 underlying) - Exercise/Conversion
Stock Option (Right to Buy)
[F1][F9]2026-03-18−219,294→ 1,774,185 totalExercise: $2.04Exp: 2027-11-07→ Class A Common Stock (219,294 underlying)
- 694,188(indirect: See Footnote)
Class A Common Stock
[F4] - 9,216(indirect: See Footnote)
Class A Common Stock
[F5] - 170,294(indirect: See Footnote)
Class A Common Stock
[F6] - 72,695(indirect: See Footnote)
Class A Common Stock
[F7] - 1,237,115(indirect: See Footnote)
Class A Common Stock
[F8]
Footnotes (9)
- [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 $8.66 to $8.975, 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 price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $8.56 to $8.83, 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.
- [F4]The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee.
- [F5]The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman.
- [F6]The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner.
- [F7]The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner.
- [F8]The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee.
- [F9]Fully vested.