Riverstone completed an investment in Three Rivers IV, Austin-based oil and gas company, in a $500m deal. "We are pleased to continue our successful partnership with Mike and his team. This investment underscores Riverstone's strategy of developing long-term relationships with management teams whose unparalleled, basin-focused operating expertise and a proven track record of investment success through commodity cycles position our funds to capture attractive risk-adjusted returns. We look forward to the Company's continued success," Robert Tichio, Riverstone Partner.