Forbes Magazine released its list of the world's billionaires Monday and five Oklahomans made the list.
Harold Hamm, the founder of Continental Resources in Oklahoma City ranks #68 worth $14.6B.
Tulsa's George Kaiser was ranked #122. Forbes lists his worth $10B as the Chairman of BOK Financial Corporation.
Other Oklahomans on the list include:
Microsoft co-founder Bill Gates topped the list as the world's richest person. Spanish clothing magnate Amancio Ortega, known for the Zara retail chain, maintained his No. 3 spot and came out ahead of famed U.S. investor Warren Buffett, who ranked fourth.
The Associated Press contributed to this report.