Exxon Closes $60B Pioneer Deal, Reshaping Permian Basin / Latest / By mark After facing regulatory scrutiny, Exxon Mobil closed a roughly $60 billion acquisition of Pioneer Natural Resources. The largest shale oil transaction ever signed will reshape the order of power in the vast Permian Basin oil field. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Related