Thomas M Siebel insider trades: C3.ai (AI) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Thomas reports to the SEC
Open-market buys and sales
57 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 13, 2026 | AI | ↓ Sell | 435,363 | $11.82 | $5.1M | Direct | Oct 14, 2026 (1d) |
| Sep 16, 2026 | AI | ↓ Sell | 444,248 | $10.77 | $4.8M | Direct | Sep 17, 2026 (1d) |
| Sep 14, 2026 | AI | ↓ Sell | 22,780 | $10.56 | $241K | Direct | Sep 15, 2026 (1d) |
| Sep 2, 2026 | AI | ↓ Sell | 16,890 | $10.30 | $174K | Direct | Sep 3, 2026 (1d) |
| Aug 11, 2026 | AI | ↓ Sell | 453,314 | $10.51 | $4.8M | Direct | Aug 13, 2026 (2d) |
| Aug 3, 2026 | AI | ↓ Sell | 139,500 | $9.61 | $1.3M | Direct | Aug 4, 2026 (1d) |
| Jul 15, 2026 | AI | ↓ Sell | 462,565 | $9.18 | $4.2M | Direct | Jul 16, 2026 (1d) |
| Jun 15, 2026 | AI | ↓ Sell | 495,575 | $11.10 | $5.5M | Direct | Jun 15, 2026 (0d) |
| Jun 2, 2026 | AI | ↓ Sell | 17,350 | $11.32 | $196K | Direct | Jun 3, 2026 (1d) |
| May 18, 2026 | AI | ↓ Sell | 481,638 | $8.70 | $4.2M | Direct | May 19, 2026 (1d) |
| May 4, 2026 | AI | ↓ Sell | 27,210 | $9.27 | $252K | Direct | May 5, 2026 (1d) |
| Mar 18, 2026 | AI | ↓ Sell | 501,497 | $8.78 | $4.4M | Direct | Mar 19, 2026 (1d) |
| Mar 2, 2026 | AI | ↓ Sell | 17,655 | $7.79 | $138K | Direct | Mar 3, 2026 (1d) |
| Feb 10, 2026 | AI | ↓ Sell | 511,732 | $11.66 | $6.0M | Direct | Feb 12, 2026 (2d) |
| Feb 2, 2026 | AI | ↓ Sell | 27,605 | $10.81 | $298K | Direct | Feb 3, 2026 (1d) |
| Jan 13, 2026 | AI | ↓ Sell | 309,589 | $13.52 | $4.2M | Indirect | Jan 15, 2026 (2d) |
| Jan 13, 2026 | AI | ↓ Sell | 212,586 | $13.52 | $2.9M | Direct | Jan 15, 2026 (2d) |
| Dec 17, 2025 | AI | ↓ Sell | 532,832 | $14.33 | $7.6M | Indirect | Dec 18, 2025 (1d) |
| Dec 12, 2025 | AI | ↓ Sell | 23,000 | $15.94 | $367K | Direct | Dec 15, 2025 (3d) |
| Dec 2, 2025 | AI | ↓ Sell | 17,000 | $14.21 | $242K | Direct | Dec 3, 2025 (1d) |
| Nov 11, 2025 | AI | ↓ Sell | 543,706 | $15.24 | $8.3M | Indirect | Nov 12, 2025 (1d) |
| Nov 3, 2025 | AI | ↓ Sell | 27,545 | $17.30 | $477K | Direct | Nov 4, 2025 (1d) |
| Oct 14, 2025 | AI | ↓ Sell | 554,802 | $18.82 | $10.4M | Indirect | Oct 16, 2025 (2d) |
| Sep 16, 2025 | AI | ↓ Sell | 566,125 | $17.23 | $9.8M | Indirect | Sep 17, 2025 (1d) |
| Sep 12, 2025 | AI | ↓ Sell | 92,000 | $16.33 | $1.5M | Direct | Sep 15, 2025 (3d) |
| Sep 2, 2025 | AI | ↓ Sell | 17,200 | $16.49 | $284K | Direct | Sep 3, 2025 (1d) |
| Aug 12, 2025 | AI | ↓ Sell | 577,678 | $16.78 | $9.7M | Indirect | Aug 14, 2025 (2d) |
| Aug 4, 2025 | AI | ↓ Sell | 336,000 | $22.77 | $7.7M | Direct | Aug 5, 2025 (1d) |
| Jul 18, 2025 | AI | ↓ Sell | 589,468 | $28.58 | $16.8M | Indirect | Jul 22, 2025 (4d) |
| Jun 11, 2025 | AI | ↓ Sell | 601,498 | $25.02 | $15.1M | Indirect | Jun 12, 2025 (1d) |
| Jun 2, 2025 | AI | ↓ Sell | 17,000 | $26.30 | $447K | Direct | Jun 3, 2025 (1d) |
| May 14, 2025 | AI | ↓ Sell | 613,777 | $24.00 | $14.7M | Indirect | May 15, 2025 (1d) |
| May 2, 2025 | AI | ↓ Sell | 27,010 | $22.27 | $602K | Direct | May 5, 2025 (3d) |
| Apr 16, 2025 | AI | ↓ Sell | 598,186 | $20.07 | $12.0M | Direct | Apr 16, 2025 (0d) |
| Apr 16, 2025 | AI | ↓ Sell | 28,113 | $20.07 | $564K | Indirect | Apr 16, 2025 (0d) |
| Mar 18, 2025 | AI | ↓ Sell | 639,081 | $21.70 | $13.9M | Direct | Mar 18, 2025 (0d) |
| Feb 12, 2025 | AI | ↓ Sell | 652,123 | $32.93 | $21.5M | Direct | Feb 13, 2025 (1d) |
| Jan 15, 2025 | AI | ↓ Sell | 665,432 | $31.38 | $20.9M | Direct | Jan 16, 2025 (1d) |
| Nov 16, 2021 | AI | ↓ Sell | 615,488 | $48.36 | $29.8M | Indirect | Nov 17, 2021 (1d) |
| Oct 15, 2021 | AI | ↓ Sell | 484,149 | $46.17 | $22.4M | Indirect | Oct 15, 2021 (0d) |
| Sep 15, 2021 | AI | ↓ Sell | 640,866 | $49.13 | $31.5M | Indirect | Sep 15, 2021 (0d) |
| Aug 18, 2021 | AI | ↓ Sell | 653,945 | $46.22 | $30.2M | Indirect | Aug 18, 2021 (0d) |
| Jul 14, 2021 | AI | ↓ Sell | 667,291 | $53.65 | $35.8M | Indirect | Jul 15, 2021 (1d) |
| Jun 15, 2021 | AI | ↓ Sell | 680,909 | $59.39 | $40.4M | Indirect | Jun 16, 2021 (1d) |
| Jun 10, 2021 | AI | ↓ Sell | 705,644 | $58.96 | $41.6M | Indirect | Jun 14, 2021 (4d) |
| Jun 9, 2021 | AI | ↓ Sell | 1,294,356 | $62.42 | $80.8M | Indirect | Jun 9, 2021 (0d) |
| Mar 17, 2021 | AI | ↓ Sell | 554,814 | $87.11 | $48.3M | Indirect | Mar 17, 2021 (0d) |
| Mar 17, 2021 | AI | ↓ Sell | 583,210 | $81.07 | $47.3M | Direct | Mar 17, 2021 (0d) |
| Mar 10, 2021 | AI | ↓ Sell | 2,263,241 | $84.82 | $192.0M | Indirect | Mar 10, 2021 (0d) |
| Sep 8, 2005 | SEBL | ↓ Sell10b5-1 | 625,000 | $8.45 | $5.3M | Siebel Living Trust | Sep 12, 2005 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other AI insiders
Open-market trades in the last 12 months
About Thomas M Siebel's insider trades
Thomas M Siebel is CEO and Chairman of the Board at C3.ai (AI). Since May 12, 2005, Thomas has reported no open-market purchases and 57 sales worth $860.0M on SEC Form 4. In the last 12 months: 21 sales ($65.2M).
8 sales (4% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include option exercises (49 filings), gifts (46 filings), shares withheld for taxes (18 filings), grants and awards (10 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every AI insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.