Stone Energy is a small independent exploration and production company that operates exclusively in the Untied States. Approximately half of its portfolio is located offshore in the shallow waters of the Gulf of Mexico (GoM) and onshore Louisiana. It also has a growing presence in the deepwater GoM and Appalachia. Stone Energy has been active in the Gulf of Mexico since 1993. In 2008 it doubled its exposure to the Gulf of Mexico Shelf through the acquisition of Bois d'Arc.