Participated · Series B · Jan 2026

Sage Geosystems is a Houston-based pressure geothermal company that extracts energy from hot dry rock by harnessing both the earth’s heat and natural pressure. Its proprietary system supports three main applications: grid-scale energy storage, 24/7 power generation, and direct heating, which together broaden geothermal’s viable geography beyond traditional hydrothermal regions. The firm is currently building its first commercial pressure-geothermal power facility within an existing Ormat power plant, showcasing a pathway to low-cost, baseload renewable electricity. In 2024 Sage signed an agreement with Meta to supply up to 150 MW of geothermal baseload power for data-center expansion east of the Rocky Mountains. Proceeds from the latest financing will fund continued technology development, construction of the inaugural commercial plant, and expansion of its energy-storage offering. Following its Series B, the company has raised more than $97 million to date, backed by a mix of strategic energy players and climate-focused investors. Although Sage has not disclosed revenue or user metrics, the size of this round underscores investor confidence in its ability to scale geothermal as a global clean-energy resource.