Thomas Siebel
$4.11B
as of 10/04/24
About Thomas Siebel
Tom Siebel built software firm Siebel Systems and sold it to Oracle in 2006 for $5.8 billion in cash and stock.
A former salesman at Oracle, he left in 1990 to launch Siebel Systems.
In 2009, he created C3.ai, an enterprise AI firm he took public in 2020 at a near $10 billion valuation.
C3.ai started as a clean energy firm. It was briefly named C3IoT in 2016 to chase the internet of things market.
He has given more than $150 million to his alma mater, U. of Illinois Urbana-Champaign, including a 2024 gift to build the Siebel School of Computing and Data Science.
Personal stats
Citizenship
United States of AmericaSource of wealth
Business softwareResidence
Woodside, CaliforniaMarital status
MarriedBirth date
11/22/52 (age 71)Number of children
4Education
Bachelor of Arts/Science, University of Illinois, Urbana-Champaign; Master of Business Administration, University of Illinois, Urbana-Champaign; Master of Science, University of Illinois, Urbana-ChampaignSelf-made
self-madeThomas Siebel’s fortune is worth
69K
troy ounces of gold
63K
median U.S. household
41K
median U.S. income
0.082%
U.S. credit card volume
0.016%
GDP of the United States
0.012%
United States debt
Net worth history
Annual ranking
Related people
Did you know?
Siebel was attacked by an elephant on a 2009 safari trip in Serengeti; he barely escaped death and underwent 19 reconstructive surgeries.
Net worth over time
Real-time ranking
Financial assets
NYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
C3.aiNYSE | AI-US
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