Insider · CIK 0001031530
Thomas M Siebel
ceoofficerdirectorownerchair
Files at AI (C3.ai, Inc.). First filing Jan 16, 2025, latest Sep 17, 2026.
Thomas M Siebel files SEC Form 4 as CEO, director, 10% owner and chair at AI (C3.ai, Inc.). Since Jan 16, 2025, Thomas M Siebel has reported 0 open-market buys worth $0 and 37 open-market sells worth $221M, the latest filed on Sep 17, 2026.
A track record needs three past buys with six months of prices behind them; Thomas M Siebel has 0, so none is measured yet.
The newest scored trade: sold $4.8M of AI on Sep 15, 2026, filed Sep 17, 2026, scored 33 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 23 sells worth $75M.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 37
$0 bought, $221M sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
AI: C3.ai, Inc.
AIOct 9, 2026 · close 11.53
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 33Weak | C3.ai, Inc. | $4.8M 444,248 shares | -44% | - | |
| 31Weak | C3.ai, Inc. | $241k 22,780 shares | -3% | - | |
| 29Weak | C3.ai, Inc. | $174k 16,890 shares | -2% | - | |
| 33Weak | C3.ai, Inc. | $4.8M 453,314 shares | -39% | +37% from low-46% from high | |
| 48Moderate | C3.ai, Inc. | $1.3M 139,500 shares | -14% | +25% from low-58% from high | |
| 40Moderate | C3.ai, Inc. | $4.2M 462,565 shares | -47% | +18% from low-69% from high | |
| 43Moderate | C3.ai, Inc. | $5.5M 495,575 shares | -65% | +40% from low-63% from high | |
| 30Weak | C3.ai, Inc. | $196k 17,350 shares | -0% | +44% from low-62% from high | |
| 25Weak | C3.ai, Inc. | $4.2M 481,638 shares | -44% | +11% from low-70% from high | |
| 18Weak | AIsell C3.ai, Inc. | $252k 27,210 shares | -4% | +19% from low-68% from high | |
| 28Weak | C3.ai, Inc. | $4.1M 491,467 shares | -47% | +9% from low-71% from high | |
| 35Weak | C3.ai, Inc. | $4.4M 501,497 shares | -50% | +11% from low-70% from high | |
| 25Weak | C3.ai, Inc. | $213k 23,435 shares | -3% | +12% from low-70% from high | |
| 24Weak | C3.ai, Inc. | $138k 17,655 shares | -2% | +9% from low-70% from high | |
| 20Weak | C3.ai, Inc. | $6.0M 511,732 shares | -41% | +13% from low-67% from high | |
| 19Weak | AIsell C3.ai, Inc. | $298k 27,605 shares | -4% | 0% from low-69% from high | |
| 38Weak | C3.ai, Inc. | $7.1M 522,175 shares | -56% | +6% from low-61% from high | |
| 43Moderate | C3.ai, Inc. | $7.6M 532,832 shares | -36% | +13% from low-66% from high | |
| 28Weak | C3.ai, Inc. | $367k 23,000 shares | -3% | +19% from low-64% from high | |
| 46Moderate | C3.ai, Inc. | $242k 17,000 shares | -52% | +12% from low-67% from high | |
| 35Weak | C3.ai, Inc. | $8.3M 543,706 shares | -27% | +1% from low-64% from high | |
| 43Moderate | AIsell C3.ai, Inc. | $477k 27,545 shares | -52% | +11% from low-60% from high | |
| 38Weak | C3.ai, Inc. | $10M 554,802 shares | -22% | +23% from low-56% from high | |
| 38Weak | C3.ai, Inc. | $9.8M 566,125 shares | -18% | +13% from low-59% from high | |
| 58Moderate | C3.ai, Inc. | $1.5M 92,000 shares | -51% | +6% from low-62% from high | |
| 47Moderate | C3.ai, Inc. | $284k 17,200 shares | -53% | +2% from low-61% from high | |
| 35Weak | C3.ai, Inc. | $9.7M 577,678 shares | -16% | +3% from low-61% from high | |
| 55Moderate | AIsell C3.ai, Inc. | $7.7M 336,000 shares | -51% | +27% from low-46% from high | |
| 35Weak | C3.ai, Inc. | $17M 589,468 shares | -15% | +57% from low-33% from high | |
| 50Moderate | C3.ai, Inc. | $15M 601,498 shares | -14% | +35% from low-43% from high | |
| 62Notable | C3.ai, Inc. | $447k 17,000 shares | -52% | +37% from low-42% from high | |
| 43Moderate | C3.ai, Inc. | $15M 613,777 shares | -12% | +32% from low-44% from high | |
| 49Moderate | AIsell C3.ai, Inc. | $602k 27,010 shares | -51% | +23% from low-48% from high | |
| 50Moderate | C3.ai, Inc. | $13M 626,299 shares | -105% | +10% from low-53% from high | |
| 58Moderate | C3.ai, Inc. | $14M 639,081 shares | -52% | - | |
| 40Moderate | C3.ai, Inc. | $21M 652,123 shares | -35% | - | |
| 40Moderate | C3.ai, Inc. | $21M 665,432 shares | -31% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Aug 3, 2026 | AI C3.ai, Inc. | 203,000 0.13% of outstanding | $1.8M | Aug 3, 2026 | $14M |
| Jul 14, 2026 | AI C3.ai, Inc. | 1,795,490 1.18% of outstanding | $16M | Jul 14, 2026 | $10M |
| May 4, 2026 | AI C3.ai, Inc. | 74,000 0.05% of outstanding | $678k | May 4, 2026 | $8.9M |
| Mar 17, 2026 | AI C3.ai, Inc. | 1,946,607 1.37% of outstanding | $17M | Mar 17, 2026 | $16M |
| Feb 2, 2026 | AI C3.ai, Inc. | 73,500 0.05% of outstanding | $810k | Feb 2, 2026 | $24M |
| Nov 12, 2025 | AI C3.ai, Inc. | 724,318 0.54% of outstanding | $11M | Nov 11, 2025 | $32M |
| Nov 12, 2025 | AI C3.ai, Inc. | 1,386,127 1.03% of outstanding | $21M | Nov 11, 2025 | $32M |
| Nov 3, 2025 | AI C3.ai, Inc. | 73,000 0.05% of outstanding | $1.3M | Nov 3, 2025 | $39M |
| Sep 2, 2025 | AI C3.ai, Inc. | 114,000 0.09% of outstanding | $2.0M | Sep 2, 2025 | $50M |
| Aug 4, 2025 | AI C3.ai, Inc. | 352,175 0.27% of outstanding | $7.9M | Aug 4, 2025 | $48M |
| Jul 18, 2025 | AI C3.ai, Inc. | 2,288,073 1.75% of outstanding | $65M | Jul 18, 2025 | $31M |
| May 2, 2025 | AI C3.ai, Inc. | 47,000 0.04% of outstanding | $1.0M | May 2, 2025 | $48M |
| Apr 14, 2025 | AI C3.ai, Inc. | 598,186 0.46% of outstanding | $12M | Apr 14, 2025 | $44M |
| Jan 14, 2025 | AI C3.ai, Inc. | 1,956,636 1.56% of outstanding | $61M | Jan 14, 2025 | none |
Transactions
The newest 50 of 207 rows this insider has filed.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +239 | $0.00 | $0 | 45,822 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +239 | $0.00 | $0 | 59,326 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +239 | $0.00 | $0 | 39,639 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +239 | $0.00 | $0 | 2,552 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class B Common Stockderivativeindirect: See Footnote | +106,793 | $0.00 | $0 | 106,793 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class B Common Stockderivativeindirect: See Footnote | +106,793 | $0.00 | $0 | 106,793 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class B Common Stockderivativeindirect: See Footnote | +106,793 | $0.00 | $0 | 106,793 | 11 d ago |
| Sep 30, 2026 | AI C3.ai, Inc. | GGift Class B Common Stockderivativeindirect: See Footnote | +106,793 | $0.00 | $0 | 106,793 | 11 d ago |
| Sep 15, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +282,001 | $3.90 | $1.1M | 1,004,363 | 26 d ago |
| Sep 15, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -282,001 | $10.90 | $3.1M | 722,362 | 26 d ago |
| Sep 16, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +162,247 | $3.90 | $633k | 884,609 | 26 d ago |
| Sep 16, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -162,247 | $10.54 | $1.7M | 722,362 | 26 d ago |
| Sep 15, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -282,001 | $0.00 | $0 | 2,131,195 | 26 d ago |
| Sep 16, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -162,247 | $0.00 | $0 | 1,968,948 | 26 d ago |
| Sep 11, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock | +44,766 | - | - | 767,128 | 28 d ago |
| Sep 14, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock | -22,780 | $10.56 | $241k | 744,348 | 28 d ago |
| Sep 14, 2026 | AI C3.ai, Inc. | GGift Class A Common Stock | -21,986 | $0.00 | $0 | 722,362 | 28 d ago |
| Sep 14, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +21,986 | $0.00 | $0 | 7,105,019 | 28 d ago |
| Sep 11, 2026 | AI C3.ai, Inc. | MOption exercise Restricted Stock Unitsderivative | -44,766 | $0.00 | $0 | 179,228 | 28 d ago |
| Sep 1, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock | +32,736 | - | - | 755,098 | 40 d ago |
| Sep 2, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock | -16,890 | $10.30 | $174k | 738,208 | 40 d ago |
| Sep 3, 2026 | AI C3.ai, Inc. | GGift Class A Common Stock | -15,846 | $0.00 | $0 | 722,362 | 40 d ago |
| Sep 3, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +15,846 | $0.00 | $0 | 7,083,033 | 40 d ago |
| Sep 1, 2026 | AI C3.ai, Inc. | MOption exercise Restricted Stock Unitsderivative | -32,736 | $0.00 | $0 | 32,738 | 40 d ago |
| Aug 11, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +453,314 | $3.90 | $1.8M | 1,175,676 | Aug 13, 2026 |
| Aug 11, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -453,314 | $10.51 | $4.8M | 722,362 | Aug 13, 2026 |
| Aug 11, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -453,314 | $0.00 | $0 | 2,413,196 | Aug 13, 2026 |
| Aug 2, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock | +283,334 | - | - | 1,005,696 | Aug 4, 2026 |
| Aug 3, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock | -139,500 | $9.61 | $1.3M | 866,196 | Aug 4, 2026 |
| Aug 4, 2026 | AI C3.ai, Inc. | GGift Class A Common Stock | -143,834 | $0.00 | $0 | 722,362 | Aug 4, 2026 |
| Aug 4, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote | +143,834 | $0.00 | $0 | 7,067,187 | Aug 4, 2026 |
| Aug 2, 2026 | AI C3.ai, Inc. | MOption exercise Performance Restricted Stock Unitsderivative | -283,334 | $0.00 | $0 | 0 | Aug 4, 2026 |
| Jul 14, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +264,100 | $2.04 | $539k | 986,462 | Jul 16, 2026 |
| Jul 14, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -264,100 | $9.07 | $2.4M | 722,362 | Jul 16, 2026 |
| Jul 15, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +64,975 | $2.04 | $133k | 787,337 | Jul 16, 2026 |
| Jul 15, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -64,975 | $9.31 | $605k | 722,362 | Jul 16, 2026 |
| Jul 15, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +133,490 | $3.90 | $521k | 855,852 | Jul 16, 2026 |
| Jul 15, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -133,490 | $9.32 | $1.2M | 722,362 | Jul 16, 2026 |
| Jul 14, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -264,100 | $0.00 | $0 | 64,975 | Jul 16, 2026 |
| Jul 15, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -64,975 | $0.00 | $0 | 0 | Jul 16, 2026 |
| Jul 15, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -133,490 | $0.00 | $0 | 2,866,510 | Jul 16, 2026 |
| Jun 11, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +44,767 | - | - | 767,129 | Jun 15, 2026 |
| Jun 12, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -23,570 | $10.92 | $257k | 743,559 | Jun 15, 2026 |
| Jun 15, 2026 | AI C3.ai, Inc. | GGift Class A Common Stock10b5-1 | -21,197 | $0.00 | $0 | 722,362 | Jun 15, 2026 |
| Jun 15, 2026 | AI C3.ai, Inc. | GGift Class A Common Stockindirect: See Footnote10b5-1 | +21,197 | $0.00 | $0 | 6,923,353 | Jun 15, 2026 |
| Jun 15, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock10b5-1 | +472,005 | $2.04 | $963k | 1,194,367 | Jun 15, 2026 |
| Jun 15, 2026 | AI C3.ai, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -472,005 | $11.11 | $5.2M | 722,362 | Jun 15, 2026 |
| Jun 11, 2026 | AI C3.ai, Inc. | MOption exercise Restricted Stock Unitsderivative10b5-1 | -44,767 | $0.00 | $0 | 223,994 | Jun 15, 2026 |
| Jun 15, 2026 | AI C3.ai, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -472,005 | $0.00 | $0 | 329,075 | Jun 15, 2026 |
| Jun 1, 2026 | AI C3.ai, Inc. | MOption exercise Class A Common Stock | +32,736 | - | - | 755,098 | Jun 3, 2026 |
50 of 207 rows shown.
Questions about Thomas M Siebel
Answered from the filings on this page, as of the latest one.
Is Thomas M Siebel buying or selling?
In the last 12 months Thomas M Siebel reported 0 open-market buys worth $0 and 23 open-market sells worth $75M on SEC Form 4; the latest was sold $4.8M of AI on Sep 15, 2026. Grants, option exercises and tax withholding are not counted.
How did Thomas M Siebel's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Thomas M Siebel has 0.
Where does Thomas M Siebel file Form 4?
Thomas M Siebel has filed Form 4 at AI (C3.ai, Inc.) as CEO and Chairman of the Board. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.