Form 4: C3.ai Executive Chairman Thomas Siebel Executes Stock Sale

C3.ai Executive Chairman Thomas Siebel sold 491,467 shares of Class A Common Stock via a pre-established 10b5-1 trading plan.

Summary

• Executive Chairman Thomas Siebel exercised options to acquire 491,467 shares of Class A Common Stock at a strike price of $2.04.
• Following the exercise, the shares were sold in two tranches on April 13 and April 14, 2026.
• The sales were executed at weighted-average prices of $8.31 and $8.49 per share, respectively.
• All transactions were conducted pursuant to a Rule 10b5-1 trading plan established on September 20, 2024.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event; while insider selling can be perceived negatively, the use of a pre-planned 10b5-1 program is a standard, transparent mechanism for executive liquidity.

Positives

• Transactions were executed under a pre-planned 10b5-1 program, indicating the sales were not based on sudden non-public information.
• The executive maintains a significant remaining beneficial ownership stake in the company across multiple trusts and entities.

Negatives

• The sale represents a reduction in the direct equity holdings of the company's Executive Chairman.

Risks

• Continued reliance on Rule 10b5-1 plans for liquidity by major insiders may signal long-term portfolio rebalancing.
• Market perception of insider selling can occasionally create downward pressure on share price regardless of the pre-planned nature of the trades.

Future Outlook

No specific forward-looking guidance regarding company operations was provided in this filing, as it is strictly a disclosure of insider transaction activity.

Management Comments

• The transactions were effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024.

Industry Context

StockSavvy.ai notes that insider selling by founders and executive chairmen is a common practice for wealth diversification and tax planning, particularly when executed through structured 10b5-1 plans, and does not necessarily reflect a lack of confidence in the company's AI software growth trajectory.

Comparison to Industry Standards

• Insider selling via 10b5-1 plans is standard practice for C-suite executives at high-growth technology firms like Palantir or Snowflake.
• The volume of shares sold is consistent with typical executive liquidity events for a company of C3.ai's market capitalization.

Related Party Transactions

• Shares held by 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.

Stakeholder Impact

• Shareholders should note the reduction in direct insider ownership, though the impact is mitigated by the structured nature of the sale.

Next Steps

• Continued monitoring of future Form 4 filings for further insider activity.

Key Dates

Keywords

C3.ai, AI, Insider Trading, Thomas Siebel, Form 4, Equity Compensation