June 16, 2026

Mantle Energy is a Dallas, Texas-based developer of an activated geothermal and enhanced energy recovery platform. The company develops technology that repurposes depleted or low-yield oil and gas wells to generate controlled underground thermal combustion, capturing heat to deliver low-carbon baseload power directly to the electric grid. It was spun out from Hunt Energy's incubator and focuses on dual-benefit extraction and carbon emission storage protocols.