 At the height of the company it was based in Parkersburg, West Virginia with additional offices in Warrendale, Pennsylvania, Allegany, New York, and Denver, Colorado, with natural gas processing facilities in Northern Pennsylvania.East Resources sold most of its assets to Royal Dutch Shell in 2010 for $4.7 billion and the rest to American Energy Partners, LP in 2014 for $1.75 billion.Pegula has shifted his focus to sports and entertainment properties, acquiring the Buffalo Sabres in 2011 and the Buffalo Bills.