Bill Casner along with Kenny Troutt founded Excel Communications telecommunications company which became the 4th largest long distance carrier in the U.S. and the quickest company to earn $1 billion in a year (they did it in 8 years, Microsoft is the 2nd quickest at 15 years) per http://en.wikipedia.org/wiki/Excel_Communications.
Casner also owns B& R Equipment, which sells and leases heavy, earth-moving equipment. The two of them also own WinStar Farms which is a Thoroughbred horse racing farm which bred Funny Cide, Mr. Hot Stuff and other well performing horses.
Mr. Casner is currently vice chairman and co-founder of the Kentucky Equine Education Project (KEEP), and he serves on the board of trustees for the Thoroughbred Owner Breeders Association and Breeders' Cup. In addition, he was a founding board member for The Race For Education Inc., a national scholarship foundation that provides educational opportunities to children of racing’s backside workers and farm workers.