Sixth Street, a private equity firm, completed the acquisition of Permian and Anadarko Basins assets from Echo, multi-strategy investment firm that connects overlooked domestic resources and infrastructure. Financial terms were not disclosed. "The significant sale of our world-class mineral asset marks the start of a new era for Echo. While energy remains a core focus of our strategy, we look forward to unlocking and advancing American innovation by making transformative investments in high-growth industries going through massive technological disruption,” Christian Kanady, Echo Founding Partner and CEO.