Several companies on the list are familiar household names, such as Exxon, BP, Chevron and ConocoPhillips. But smaller companies with large footprints in Pennsylvania such Chesapeake Energy and Southwestern are also in the top ten.
“Much of the growth in gas production has come from drilling into shale formations, which provided 23 percent of the nation’s gas in 2010, according to the EIA. Our list shows how integrated behemoths have expanded into this area as production has become proven, sometimes by swallowing up independents that led the way.”
ProPublica’s list also includes revenues, gas reserves and executive compensation.