Roan Resources Inc. operates exploration and production fields. Linn Energy was founded in 2003 by Michael Linn and completed an initial public offering in 2006. Linn acquired assets from Dominion Energy in 2007. Linn filed for Chapter 11 bankruptcy in 2016 and completed restructuring in 2017 to form Roan with additional assets from Citizen Energy II. Roan began trading on the NYSE exchange in 2018 and agreed to be acquired by Citizen Energy Operating in 2019.