Carnelian Energy Capital, a private equity firm, completed the investment in Ridgemar Energy, a Houston-based oil and gas company. Financial terms were not disclosed. “After working alongside Preston for years and seeing his knack for creative deal making first hand, we are excited to partner with him and Mina and David. We believe the team’s commercial acumen, technical skillset and nimble approach will position Ridgemar for success," Tomas Ackerman, Carnelian Energy Partner.