SIEBEL THOMAS M — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

SIEBEL THOMAS M has filed 4 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $131.90M.

Profile

Thomas M. Siebel is an American technology entrepreneur and the founder of C3.ai, Inc., where he serves as Chief Executive Officer and Executive Chairman. He previously founded Siebel Systems, a leading customer relationship management software company, which was acquired by Oracle Corporation in 2006.

Board memberships

• C3.ai, Inc.
• Siebel Systems
• Oracle Corporation

Awards & honors

• Founded C3.ai, Inc.
• Founded Siebel Systems
• Pioneered CRM software

Recent Transactions

Companies — Last 90 Days

• C3.ai, Inc. (AI) — 4 filings, last 2026-06-16

Frequently Asked Questions

Who is SIEBEL THOMAS M?

Thomas M. Siebel is an American technology entrepreneur and the founder of C3.ai, Inc., where he serves as Chief Executive Officer and Executive Chairman. He previously founded Siebel Systems, a leading customer relationship management software company, which was acquired by Oracle Corporation in 2006.…

How many SEC Form 4 filings has SIEBEL THOMAS M submitted recently?

4 primary Form 4 filings in the last 90 days, covering 1 company.

Has SIEBEL THOMAS M been buying or selling stock?

Recorded transactions: 0 open-market purchases () and 38 open-market sales ($131.90M) across all tracked filings.

Where can I see all of SIEBEL THOMAS M'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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