C3.ai CEO sells 444K shares after option exercise
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Form Type
4
Rhea-AI Filing Summary
C3.ai, Inc. (AI) reports that CEO, Chairman and ten percent owner Thomas M. Siebel exercised stock options for a total of 444,248 shares of Class A Common Stock at an exercise price of $3.90 per share on September 15 and 16, 2026, and sold the same number of shares in open-market transactions. These transactions were effected under a previously established Rule 10b5-1 trading plan dated September 20, 2024, and the options exercised were fully vested.
Insider Trade Summary 10b5-1
Exercise and Sale: 444,248 shares ($3.05M approx. pre-tax spread)
Exercise and Sale
6 txns
Insider
SIEBEL THOMAS M
Role
CEO and Chairman of the Board
Sold
444,248 shs ($4.78M)
Approx. gross sale proceeds
$4.78M
Approx. exercise cost
$1.73M
Approx. pre-tax spread
$3.05M
Share of Position Sold
38.1%
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (Right to Buy) F1, F9 | 162,247 | $0.00 | $0.00 |
| Exercise | Class A Common Stock F1 | 162,247 | $3.90 | $633K |
| Sale | Class A Common Stock F1, F3 | 162,247 | $10.54 | $1.71M |
| Exercise | Stock Option (Right to Buy) F1, F9 | 282,001 | $0.00 | $0.00 |
| Exercise | Class A Common Stock F1 | 282,001 | $3.90 | $1.10M |
| Sale | Class A Common Stock F1, F2 | 282,001 | $10.90 | $3.07M |
| Holding | Class A Common Stock F4 | -- | -- | -- |
| Holding | Class A Common Stock F5 | -- | -- | -- |
| Holding | Class A Common Stock F6 | -- | -- | -- |
| Holding | Class A Common Stock F7 | -- | -- | -- |
| Holding | Class A Common Stock F8 | -- | -- | -- |
Holdings After Transaction:
Stock Option (Right to Buy) — 1,968,948 contracts (Direct);
Class A Common Stock — 722,362 shares (Direct);
Class A Common Stock — 8,594,339 shares (Indirect, See Footnote)
Holdings Before and After:
Stock Option (Right to Buy), 2,413,196 to 1,968,948 contracts (Direct);
Class A Common Stock, 722,362 to 722,362 shares (Direct)
Other Insiders: 1 other insider reported open-market sales of this stock in the 30 days up to this filing.
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 $10.76 to $11.04, 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 $10.35 to $10.68, 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
Shares sold: 444,248 shares
Shares acquired via option exercise: 444,248 shares
Option exercise price: $3.90 per share
+5 more
8 metrics
Shares sold
444,248 shares
Total Class A Common Stock sold on September 15–16, 2026
Shares acquired via option exercise
444,248 shares
Class A Common Stock received from option exercises on September 15–16, 2026
Option exercise price
$3.90 per share
Exercise price for 282,001 and 162,247 stock options
Weighted-average sale price (Sept 15, 2026)
$10.90 per share
Shares sold in multiple transactions between $10.76 and $11.04
Weighted-average sale price (Sept 16, 2026)
$10.54 per share
Shares sold in multiple transactions between $10.35 and $10.68
Options exercised
2 exercises, 444,248 shares total
Derivative transactions coded as exercises (M) in the Form 4
Rule 10b5-1 plan date
September 20, 2024
Date of previously established trading plan covering these transactions
Option expiration date
November 27, 2028
Expiration for the exercised stock options
Key Terms
Rule 10b5-1 trading plan, weighted-average price, general partner, co-trustee, +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.
general partner financial
"Siebel Asset Management, L.P., of which the Reporting Person is the general partner"
A general partner is the person or firm that runs an investment partnership and legally represents it — they make the day-to-day decisions, choose which assets to buy or sell, and are responsible for the partnership’s obligations. Investors care because the general partner’s judgment, risk-taking and fee and profit-sharing arrangements determine both the potential returns and the level of exposure to losses; think of the GP as the ship’s captain whose skill and honesty shape the voyage’s outcome.
co-trustee financial
"The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee"
stock option (right to buy) financial
"Security title reported as Stock Option (Right to Buy) with an exercise price of $3.90"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did C3.ai (AI) report for Thomas M. Siebel?
C3.ai reported that Thomas M. Siebel exercised options for 444,248 shares of Class A Common Stock at $3.90 per share and sold the same number of shares in open-market transactions on September 15 and 16, 2026.
Were the C3.ai (AI) insider trades by Thomas Siebel under a Rule 10b5-1 plan?
Yes. The filing states the transactions were effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024, and the plan-level checkbox for Rule 10b5-1 was affirmed.
How many C3.ai (AI) options did Thomas Siebel exercise in this Form 4?
Thomas Siebel exercised stock options covering 444,248 shares of Class A Common Stock, consisting of 282,001 shares and 162,247 shares, each with a $3.90 per-share exercise price and an option expiration date of November 27, 2028.
What indirect holdings in C3.ai (AI) are associated with Thomas Siebel?
The Form 4 shows indirect ownership interests through several entities, including The Siebel Living Trust, First Virtual Holdings, LLC, Siebel Asset Management partnerships, and The Siebel 2011 Irrevocable Children's Trust, all referenced in footnotes, without share counts in this excerpt.
AI-generated analysis. How Rhea-AI works. Not financial advice.
