George Mitchell - Fortune - Billionaire list

George Mitchell
George P. Mitchell (born 1920), self-made billionaire, started Mitchell Energy & Development in 1946, sold to Devon Energy in 2001 for $3.5 billion. He hit it big in north Texas gas fields. Longtime environmentalist opposed oil drilling in Alaska wildlife refuge, funded $10 million National Academies study on sustainable development and population growth. Donated $1.2 million to Texas A&M University to fund Giant Magellan Telescope.

He is married and has 10 children. Education: Texas A&M University, Bachelor of Arts / Science.

$1.5 billion as of 2005.