William Koch
$1.95B
as of 05/12/26
About William Koch
William "Bill" Koch, brother of Koch Industries chairman and co-CEO Charles Koch, is the founder of petroleum coke and sulphur products company Oxbow Carbon Corp.
The Kansas native formed his own company after selling his stake in Koch Industries to brothers Charles and David (d. 2019) for $470 million in 1983.
He battled his brothers for two decades over the payout amount. The case was settled for an undisclosed amount in 2001.
Bill's brother Frederick (d. 2020) also sold his stake in Koch Industries to Charles and David in 1983 and was involved in the ensuing legal battle.
Koch Industries was started in 1940 by Bill's father, Fred Koch, who improved a method of refining heavy oil into gasoline.
Personal stats
Citizenship
United States of AmericaSource of wealth
Oil, investmentsResidence
Palm Beach, FloridaMarital status
MarriedBirth date
05/03/40 (age 86)Number of children
6Education
Bachelor of Arts/Science, Massachusetts Institute of Technology; Doctorate, Massachusetts Institute of TechnologySelf-made
inherited and growingWilliam Koch’s fortune is worth
33K
troy ounces of gold
30K
median U.S. household
20K
median U.S. income
0.039%
U.S. credit card volume
0.008%
GDP of the United States
0.006%
United States debt
Net worth history
Annual ranking
Related people
Did you know?
Bill and David were fraternal twins; the duo went to MIT together and played on the same basketball team.
Net worth over time
Real-time ranking
Images © Forbes.com. All rights reserved.