Fieldwood Energy, LLC. (Fieldwood) is a Houston-based portfolio company of Riverstone Holdings, LLC. (Riverstone), focused on the acquisition and development of conventional oil and gas assets in North America, including the Gulf of Mexico. On September 30, 2013, Fieldwood acquired Apache Corporation’s (Apache) Gulf of Mexico Shelf (Shelf) business for approximately $3.75 billion. Fieldwood engaged Opportune to perform a valuation advisory service of Fieldwood and related units to management.