What Hamilton, Bermuda based holding company who formerly featured CEO John J Byrne?
John J. Byrne John J. Byrne (July 11, 1932 – March 7, 2013) was an American longtime insurance industry executive who was CEO of GEICO, White Mountains Insurance Group and Fireman's Fund. He also served as chairman of Overstock.com.
Jeffery Hildebrand Jeffery Hildebrand (born 1959) is an American businessman, who is the founder, chairman, and chief executive officer (CEO) of Hilcorp Energy Company.