Summary
Updated Aug 31, 2026
Thomas M. Siebel is CEO and Chairman of the Board, Director, 10% Owner of C3.ai, Inc. (AI). 31 SEC Form 4 filings on record going back to 2024, most recently on 13 August 2026. Most recent open-market trade: sold $4.76M of AI on 13 August 2026. Lifetime open-market sales: $151.26M.
Recent Transactions
20Every recent SEC Form 4 transaction Thomas M. Siebel has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Thomas M. Siebel go back to 2024: 31 primary Form 4 filings, an average of 10.3 per year. 47 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Thomas M. Siebel files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Robert David Schilling - $8.13M of AI open-market activity in the last 12 months
- Hitesh Lath - $1.93M of AI open-market activity in the last 12 months
- Stephen Bradley Ehikian - $907K of AI open-market activity in the last 12 months
- Jim H. Snabe - $383K of AI open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Thomas M. Siebel?
Thomas M. Siebel is a corporate insider, tracked as CEO and Chairman of the Board, Director, 10% Owner of C3.ai, Inc. (AI). InsiderAlpha holds 31 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Thomas M. Siebel submitted recently?
5 primary Form 4 filings in the last 90 days, covering 1 company.
Has Thomas M. Siebel been buying or selling stock?
Recorded transactions: 0 open-market purchases and 46 open-market sales ($151.26M) across all tracked filings.
Where can I see all of Thomas M. Siebel's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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