Insider trades › Thomas M. Siebel
Thomas M. Siebel
A corporate insider: an officer, director or owner of more than 10% of a company. Insiders report their trades to the SEC on Form 4The form insiders use to report each purchase or sale of their company's stock. It is due within two business days of the trade. · Last filing Nov 12, 2026
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Using 13F.ai, list Thomas M. Siebel's open-market buys and sells across companies in the last two years, with the Form 4 links.
Using 13F.ai, how did the stocks Thomas M. Siebel bought perform after the purchase compared with the S&P 500?
Using 13F.ai, are other insiders at the same companies buying or selling at the same time as Thomas M. Siebel?
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Buying and selling by quarter
Dollars bought and sold on the open market over the last two years.
Bought Sold
By trade date, using the shares and price reported for each trade. Stock grants, option exercises and shares withheld for tax are left out.
Roles
The companies where this person reports as an insider, and their position at each, most recent first.
| Company | Role | Last filed |
|---|---|---|
| AI C3.ai, Inc. | CEO and Chairman of the Board, Director, 10% owner | Nov 12, 2026 |
Roles come from the filings themselves and can change over time.
Latest open-market trades
Purchases and sales at every company, most recent filing first.
| How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss. | Filing | ||||||
|---|---|---|---|---|---|---|---|
| Nov 11, 2026 | AI C3.ai, Inc. | Sale | 97,913 | $12.14 | $1.2M | -2.3% | Form 4 ↗ |
| Nov 10, 2026 | AI C3.ai, Inc. | Sale | 328,742 | $11.76 | $3.9M | -0.8% | Form 4 ↗ |
| Sep 16, 2026 | AI C3.ai, Inc. | Sale | 162,247 | $10.54 | $1.7M | +11.9% | Form 4 ↗ |
| Sep 15, 2026 | AI C3.ai, Inc. | Sale | 282,001 | $10.90 | $3.1M | +9.9% | Form 4 ↗ |
| Sep 14, 2026 | AI C3.ai, Inc. | Sale | 22,780 | $10.56 | $240.6K | +6.7% | Form 4 ↗ |
| Sep 2, 2026 | AI C3.ai, Inc. | Sale | 16,890 | $10.30 | $174.0K | +13.8% | Form 4 ↗ |
| Aug 11, 2026 | AI C3.ai, Inc. | Sale | 453,314 | $10.51 | $4.8M | +13.3% | Form 4 ↗ |
| Aug 3, 2026 | AI C3.ai, Inc. | Sale | 139,500 | $9.61 | $1.3M | +21.9% | Form 4 ↗ |
| Jul 15, 2026 | AI C3.ai, Inc. | Sale | 64,975 | $9.31 | $604.9K | +29.4% | Form 4 ↗ |
| Jul 15, 2026 | AI C3.ai, Inc. | Sale | 133,490 | $9.32 | $1.2M | +29.4% | Form 4 ↗ |
| Jul 14, 2026 | AI C3.ai, Inc. | Sale | 264,100 | $9.07 | $2.4M | +28.8% | Form 4 ↗ |
| Jun 15, 2026 | AI C3.ai, Inc. | Sale | 472,005 | $11.11 | $5.2M | +7.2% | Form 4 ↗ |
| Jun 12, 2026 | AI C3.ai, Inc. | Sale | 23,570 | $10.92 | $257.4K | +6.7% | Form 4 ↗ |
| Jun 2, 2026 | AI C3.ai, Inc. | Sale | 17,350 | $11.32 | $196.4K | +6.4% | Form 4 ↗ |
| May 18, 2026 | AI C3.ai, Inc. | Sale | 112,014 | $8.65 | $968.9K | +33.0% | Form 4 ↗ |
| May 15, 2026 | AI C3.ai, Inc. | Sale | 369,624 | $8.72 | $3.2M | +34.6% | Form 4 ↗ |
| May 4, 2026 | AI C3.ai, Inc. | Sale | 27,210 | $9.27 | $252.2K | +23.1% | Form 4 ↗ |
| Apr 14, 2026 | AI C3.ai, Inc. | Sale | 165,278 | $8.49 | $1.4M | +32.1% | Form 4 ↗ |
| Apr 13, 2026 | AI C3.ai, Inc. | Sale | 326,189 | $8.31 | $2.7M | +29.6% | Form 4 ↗ |
| Mar 18, 2026 | AI C3.ai, Inc. | Sale | 219,294 | $8.67 | $1.9M | +23.2% | Form 4 ↗ |
| Mar 17, 2026 | AI C3.ai, Inc. | Sale | 282,203 | $8.86 | $2.5M | +21.7% | Form 4 ↗ |
| Mar 12, 2026 | AI C3.ai, Inc. | Sale | 23,435 | $9.11 | $213.5K | +20.0% | Form 4 ↗ |
| Mar 2, 2026 | AI C3.ai, Inc. | Sale | 17,655 | $7.79 | $137.5K | +26.7% | Form 4 ↗ |
| Feb 10, 2026 | AI C3.ai, Inc. | Sale | 511,732 | $11.66 | $6.0M | -6.0% | Form 4 ↗ |
| Feb 2, 2026 | AI C3.ai, Inc. | Sale | 27,605 | $10.81 | $298.4K | -0.2% | Form 4 ↗ |
| Jan 13, 2026 | AI C3.ai, Inc. | Sale | 212,586 | $13.52 | $2.9M | -21.6% | Form 4 ↗ |
| Jan 13, 2026 | AI C3.ai, Inc. | Sale | 309,589 | $13.52 | $4.2M | -21.6% | Form 4 ↗ |
| Dec 17, 2025 | AI C3.ai, Inc. | Sale | 140,768 | $14.22 | $2.0M | -28.2% | Form 4 ↗ |
| Dec 16, 2025 | AI C3.ai, Inc. | Sale | 392,064 | $14.37 | $5.6M | -29.5% | Form 4 ↗ |
| Dec 12, 2025 | AI C3.ai, Inc. | Sale | 23,000 | $15.94 | $366.6K | -33.2% | Form 4 ↗ |
| Dec 2, 2025 | AI C3.ai, Inc. | Sale | 17,000 | $14.21 | $241.6K | -28.4% | Form 4 ↗ |
| Nov 11, 2025 | AI C3.ai, Inc. | Sale | 543,706 | $15.24 | $8.3M | -33.2% | Form 4 ↗ |
| Nov 3, 2025 | AI C3.ai, Inc. | Sale | 27,545 | $17.30 | $476.5K | -41.4% | Form 4 ↗ |
| Oct 14, 2025 | AI C3.ai, Inc. | Sale | 554,802 | $18.82 | $10.4M | -51.7% | Form 4 ↗ |
| Sep 16, 2025 | AI C3.ai, Inc. | Sale | 566,125 | $17.23 | $9.8M | -46.8% | Form 4 ↗ |
| Sep 12, 2025 | AI C3.ai, Inc. | Sale | 92,000 | $16.33 | $1.5M | -42.8% | Form 4 ↗ |
| Sep 2, 2025 | AI C3.ai, Inc. | Sale | 17,200 | $16.49 | $283.6K | -47.5% | Form 4 ↗ |
| Aug 12, 2025 | AI C3.ai, Inc. | Sale | 577,678 | $16.78 | $9.7M | -47.5% | Form 4 ↗ |
| Aug 4, 2025 | AI C3.ai, Inc. | Sale | 336,000 | $22.77 | $7.7M | -68.5% | Form 4 ↗ |
| Jul 18, 2025 | AI C3.ai, Inc. | Sale | 575,874 | $28.56 | $16.4M | -79.0% | Form 4 ↗ |
| Jul 18, 2025 | AI C3.ai, Inc. | Sale | 13,594 | $29.24 | $397.5K | -79.0% | Form 4 ↗ |
| Jun 11, 2025 | AI C3.ai, Inc. | Sale | 590,995 | $25.01 | $14.8M | -77.5% | Form 4 ↗ |
| Jun 11, 2025 | AI C3.ai, Inc. | Sale | 10,503 | $25.76 | $270.6K | -77.5% | Form 4 ↗ |
| Jun 2, 2025 | AI C3.ai, Inc. | Sale | 17,000 | $26.30 | $447.1K | -79.9% | Form 4 ↗ |
| May 14, 2025 | AI C3.ai, Inc. | Sale | 272,079 | $23.99 | $6.5M | -78.9% | Form 4 ↗ |
| May 13, 2025 | AI C3.ai, Inc. | Sale | 341,698 | $24.00 | $8.2M | -79.3% | Form 4 ↗ |
| May 2, 2025 | AI C3.ai, Inc. | Sale | 27,010 | $22.27 | $601.5K | -80.5% | Form 4 ↗ |
| Apr 16, 2025 | AI C3.ai, Inc. | Sale | 13,567 | $19.47 | $264.1K | -82.4% | Form 4 ↗ |
| Apr 16, 2025 | AI C3.ai, Inc. | Sale | 634 | $19.47 | $12.3K | -82.4% | Form 4 ↗ |
| Apr 15, 2025 | AI C3.ai, Inc. | Sale | 228,201 | $19.92 | $4.5M | -81.1% | Form 4 ↗ |
| Apr 15, 2025 | AI C3.ai, Inc. | Sale | 10,728 | $19.92 | $213.7K | -81.1% | Form 4 ↗ |
| Apr 14, 2025 | AI C3.ai, Inc. | Sale | 44,930 | $20.81 | $935.0K | -81.0% | Form 4 ↗ |
| Apr 14, 2025 | AI C3.ai, Inc. | Sale | 311,488 | $20.10 | $6.3M | -81.0% | Form 4 ↗ |
| Apr 14, 2025 | AI C3.ai, Inc. | Sale | 14,639 | $20.10 | $294.2K | -81.0% | Form 4 ↗ |
| Apr 14, 2025 | AI C3.ai, Inc. | Sale | 2,112 | $20.81 | $44.0K | -81.0% | Form 4 ↗ |
| Mar 18, 2025 | AI C3.ai, Inc. | Sale | 127,191 | $21.83 | $2.8M | -81.1% | Form 4 ↗ |
| Mar 18, 2025 | AI C3.ai, Inc. | Sale | 800 | $22.25 | $17.8K | -81.1% | Form 4 ↗ |
| Mar 17, 2025 | AI C3.ai, Inc. | Sale | 216,974 | $21.88 | $4.7M | -79.1% | Form 4 ↗ |
| Mar 14, 2025 | AI C3.ai, Inc. | Sale | 294,116 | $21.50 | $6.3M | -79.3% | Form 4 ↗ |
| Feb 12, 2025 | AI C3.ai, Inc. | Sale | 20,828 | $32.58 | $678.6K | -88.7% | Form 4 ↗ |
| Feb 12, 2025 | AI C3.ai, Inc. | Sale | 78,873 | $32.22 | $2.5M | -88.7% | Form 4 ↗ |
| Feb 11, 2025 | AI C3.ai, Inc. | Sale | 120,748 | $34.37 | $4.2M | -87.7% | Form 4 ↗ |
| Feb 11, 2025 | AI C3.ai, Inc. | Sale | 334,227 | $32.43 | $10.8M | -87.7% | Form 4 ↗ |
| Feb 11, 2025 | AI C3.ai, Inc. | Sale | 97,447 | $33.49 | $3.3M | -87.7% | Form 4 ↗ |
| Jan 15, 2025 | AI C3.ai, Inc. | Sale | 222,212 | $31.96 | $7.1M | -90.0% | Form 4 ↗ |
| Jan 15, 2025 | AI C3.ai, Inc. | Sale | 33,389 | $32.66 | $1.1M | -90.0% | Form 4 ↗ |
| Jan 14, 2025 | AI C3.ai, Inc. | Sale | 319,629 | $30.82 | $9.9M | -91.3% | Form 4 ↗ |
| Jan 14, 2025 | AI C3.ai, Inc. | Sale | 90,202 | $31.48 | $2.8M | -91.3% | Form 4 ↗ |
Each row links to its Form 4. Since trade compares the stock’s move from the close on the trade date (or the next trading day) to its latest close with the S&P 500 over the same days, adjusted for splits and excluding dividends. It describes the stock, not what the trader made: we don’t know their purchase price, position size or later sales. A dash means the trade isn’t matched to a listed stock, or there is no closing price after it yet.
When several people report on the same filing, we list it under the first one named, so trades by someone usually listed second may be missing here. Information, not investment advice: see the disclaimer.