C3.ai (AI) CEO Thomas Siebel exercises 453K options, sells shares under 10b5-1 plan
Rhea-AI Filing Summary
C3.ai, Inc. CEO and Chairman Thomas M. Siebel exercised a stock option for 453,314 shares of Class A Common Stock at an exercise price of $3.90 per share on August 11, 2026, then sold 453,314 shares at a weighted-average price of $10.51 per share. The option was reported as fully vested and had an expiration date of November 27, 2028. After the exercise, 2,413,196 stock options remained reported as held directly. The activity was effected under a previously established Rule 10b5-1 trading plan dated September 20, 2024. Additional Class A Common Stock is reported as held indirectly through various trusts, LLCs and limited partnerships associated with Siebel.
Positive
- None.
Negative
- None.
Insider Trade Summary 10b5-1
Exercise and Sale: 453,314 shares ($3.00M approx. pre-tax spread)
Exercise and Sale
8 txns
Insider
SIEBEL THOMAS M
Role
CEO and Chairman of the Board
Sold
453,314 shs ($4.76M)
Approx. gross sale proceeds
$4.76M
Approx. exercise cost
$1.77M
Approx. pre-tax spread
$3.00M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (Right to Buy) F1, F8 | 453,314 | $0.00 | $0.00 |
| Exercise | Class A Common Stock F1 | 453,314 | $3.90 | $1.77M |
| Sale | Class A Common Stock F1, F2 | 453,314 | $10.51 | $4.76M |
| holding | Class A Common Stock F3 | -- | -- | -- |
| holding | Class A Common Stock F4 | -- | -- | -- |
| holding | Class A Common Stock F5 | -- | -- | -- |
| holding | Class A Common Stock F6 | -- | -- | -- |
| holding | Class A Common Stock F7 | -- | -- | -- |
Holdings After Transaction:
Stock Option (Right to Buy) — 2,413,196 shares (Direct);
Class A Common Stock — 722,362 shares (Direct);
Class A Common Stock — 8,556,507 shares (Indirect, See Footnote)
Footnotes (8)
- 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 $10.30 to $10.69, 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 Chairman.
- F5. The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner.
- F6. The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner.
- F7. The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee.
- F8. Fully vested.
Key Figures
Options exercised: 453,314 shares
Exercise price: $3.90 per share
Shares sold: 453,314 shares
+4 more
7 metrics
Options exercised
453,314 shares
Stock options for Class A Common Stock exercised on August 11, 2026 at $3.90
Exercise price
$3.90 per share
Exercise price for Stock Option (Right to Buy) into Class A Common Stock
Shares sold
453,314 shares
Class A Common Stock sold on August 11, 2026 following option exercise
Weighted-average sale price
$10.51 per share
Weighted-average price for multiple sale transactions between $10.30 and $10.69
Remaining stock options
2,413,196 options
Total stock options reported as directly held after the exercise
Option expiration date
November 27, 2028
Expiration date of the Stock Option (Right to Buy) that was exercised
Rule 10b5-1 plan date
September 20, 2024
Date of previously established Rule 10b5-1 trading plan governing the transactions
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"
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"
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.
fully vested financial
"Fully vested."
FAQ
What did C3.ai (AI) CEO Thomas Siebel report in this Form 4?
Thomas Siebel reported exercising 453,314 stock options for Class A Common Stock at $3.90 per share and selling 453,314 shares at a weighted-average price of $10.51 per share on August 11, 2026, under a Rule 10b5-1 plan.
How many C3.ai (AI) stock options does Thomas Siebel report holding after this transaction?
Following the reported option exercise, Siebel reports 2,413,196 stock options remaining as directly held. These options relate to C3.ai Class A Common Stock and reflect the position after exercising 453,314 options on August 11, 2026.
Was Thomas Siebel’s C3.ai (AI) stock sale under a Rule 10b5-1 plan?
Yes. The filing states the transactions were effected under a previously established Rule 10b5-1 trading plan dated September 20, 2024, indicating the exercise and sale were pre-arranged under that plan.
What does the weighted-average sale price mean in this C3.ai (AI) insider trade?
The reported $10.51 sale price is a weighted-average price across multiple trades between $10.30 and $10.69. The insider notes that detailed share counts at each individual price level are available upon request.
AI-generated analysis. How Rhea-AI works. Not financial advice.
