Devon, an independent energy company, agreed to acquire Williston basin assets of Warburg Pincus-backed RimRock Oil and Gas, an independent oil and gas company, for $865m. "Over the course of our partnership, RimRock built a strategic acreage position with a sizable inventory of core drilling locations, developing a clearly differentiated asset in the Basin. We would like to thank Jim and the RimRock team for their hard work and dedication to create a strong business of scale and value," John Rowan, Warburg Pincus Managing Director.