Form 4: C3.ai Executive Chairman Thomas Siebel Reports Stock Trades

C3.ai Executive Chairman Thomas Siebel exercised restricted stock units and sold shares to cover tax obligations.

Summary

• Executive Chairman Thomas Siebel exercised 53,125 restricted stock units (RSUs) on May 1, 2026.
• A portion of the resulting shares (27,210) was sold at a weighted-average price of $9.27 to satisfy tax withholding requirements.
• The reporting person transferred 25,915 shares as a gift to a trust.
• Following these transactions, the reporting person maintains direct and indirect beneficial ownership of over 2 million shares.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the transactions are routine administrative actions related to executive compensation and tax compliance.

Positives

• The transaction reflects the standard vesting schedule of equity compensation for the Executive Chairman.
• The sale of shares was specifically executed to satisfy tax obligations, a routine corporate practice.

Negatives

• The filing indicates a reduction in direct share ownership, though largely offset by tax-related sales and trust transfers.

Risks

• The reporting person's significant ownership stake means that future sales or transfers could influence market perception of the stock.

Future Outlook

The filing does not provide forward-looking financial guidance, as it is a disclosure of insider transaction activity.

Industry Context

StockSavvy.ai notes that insider transactions involving the exercise of RSUs and subsequent tax-related sales are common in the technology sector and generally do not signal a change in corporate strategy or outlook.

Comparison to Industry Standards

• The transaction follows standard SEC reporting requirements for executive equity compensation.
• The use of automatic sell-to-cover programs is consistent with best practices for corporate governance among publicly traded tech firms.

Related Party Transactions

• The reporting person transferred shares to The Siebel Living Trust, of which he is the trustee.

Stakeholder Impact

• Minimal impact on shareholders as the transactions were primarily for tax compliance and internal trust management.

Next Steps

• Continued monitoring of insider trading activity for potential shifts in executive sentiment.

Key Dates

Keywords

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