C3.ai chair exercises options, sells 491,467 shares
C3.ai, Inc. Executive Chairman Thomas M. Siebel reported option exercises and share sales in Class A Common Stock.
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Form Type
4
Rhea-AI Filing Summary
C3.ai, Inc. Executive Chairman Thomas M. Siebel reported option exercises and share sales in Class A Common Stock. On April 13 and 14, 2026, he exercised stock options to acquire a total of 491,467 shares at an exercise price of $2.04 per share.
He then sold 326,189 shares at a weighted-average price of $8.31 on April 13 and 165,278 shares at a weighted-average price of $8.49 on April 14 in open-market transactions. Following these transactions, his directly held Class A Common Stock position was 722,362 shares, and the filing also lists several indirect holdings through trusts and affiliated entities. The transactions were effected under a previously established Rule 10b5-1 trading plan dated September 20, 2024.
Insider Trade Summary 10b5-1
Exercise and Sale: 491,467 shares ($3.11M approx. pre-tax spread)
Exercise and Sale
11 txns
Insider
SIEBEL THOMAS M
Role
Executive Chairman
Sold
491,467 shs ($4.11M)
Approx. gross sale proceeds
$4.11M
Approx. exercise cost
$1.00M
Approx. pre-tax spread
$3.11M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (Right to Buy) | 165,278 | $0.00 | $0.00 |
| Exercise | Class A Common Stock | 165,278 | $2.04 | $337K |
| Sale | Class A Common Stock | 165,278 | $8.49 | $1.40M |
| Exercise | Stock Option (Right to Buy) | 326,189 | $0.00 | $0.00 |
| Exercise | Class A Common Stock | 326,189 | $2.04 | $665K |
| Sale | Class A Common Stock | 326,189 | $8.31 | $2.71M |
| holding | Class A Common Stock | -- | -- | -- |
| holding | Class A Common Stock | -- | -- | -- |
| holding | Class A Common Stock | -- | -- | -- |
| holding | Class A Common Stock | -- | -- | -- |
| holding | Class A Common Stock | -- | -- | -- |
Holdings After Transaction:
Stock Option (Right to Buy) — 1,282,718 contracts (Direct);
Class A Common Stock — 722,362 shares (Direct);
Class A Common Stock — 2,183,508 shares (Indirect, See Footnote)
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 $7.92 to $8.52, 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 $8.37 to $8.74, 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.
Key Figures
Options exercised (April 13): 326,189 shares at $2.04
Options exercised (April 14): 165,278 shares at $2.04
Shares sold (April 13): 326,189 shares at $8.31
+4 more
7 metrics
Options exercised (April 13)
326,189 shares at $2.04
Stock Option (Right to Buy) into Class A Common Stock
Options exercised (April 14)
165,278 shares at $2.04
Stock Option (Right to Buy) into Class A Common Stock
Shares sold (April 13)
326,189 shares at $8.31
Weighted-average sale price in open-market transactions
Shares sold (April 14)
165,278 shares at $8.49
Weighted-average sale price in open-market transactions
Net shares exercised
491,467 shares
Total underlying Class A Common Stock from option exercises
Direct shares after transactions
722,362 shares
Class A Common Stock directly owned post-transaction
Rule 10b5-1 plan date
September 20, 2024
Previously established trading plan governing these trades
Key Terms
Rule 10b5-1 trading plan, weighted-average price, Stock Option (Right to Buy, Class A Common Stock, +1 more
5 terms
Rule 10b5-1 trading plan regulatory
"The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted-average price financial
"The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $7.92 to $8.52, inclusive."
Weighted-average price is the average of multiple prices where each price is counted according to its size or importance—larger trades carry more weight than smaller ones, like averaging course grades by credit hours. It matters to investors because it gives a more realistic picture of the true price paid or received, helping assess trade execution, compare performance, calculate cost basis, and value positions more accurately than a simple average.
Stock Option (Right to Buy financial
""security_title": "Stock Option (Right to Buy)""
Class A Common Stock financial
""underlying_security_title": "Class A Common Stock""
Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.
irrevocable trust financial
"The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee."
An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did C3.ai (AI) Executive Chairman Thomas Siebel do in this Form 4?
Thomas Siebel exercised stock options and sold C3.ai Class A Common Stock. He exercised options for 491,467 shares at $2.04 per share and sold the same number of shares in open-market transactions over two days, while retaining a substantial direct and indirect ownership stake.
What options did Thomas Siebel exercise in C3.ai (AI) stock?
Siebel exercised stock options labeled as “Stock Option (Right to Buy)” for 326,189 underlying shares and 165,278 underlying shares of Class A Common Stock. Each block was exercised at an exercise price of $2.04 per share, converting derivative positions into directly held common shares.
What does the weighted-average price mean in this C3.ai (AI) Form 4?
Weighted-average price means each reported sale price reflects multiple trades at different prices averaged together. For Siebel’s sales, the filing notes ranges of $7.92–$8.52 and $8.37–$8.74, and offers to provide the exact share counts at each individual price level upon request.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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