Mazama Energy is a geothermal developer that has differentiated technology to deliver and scale superhot rock geothermal. In 2025 Mazama achieved the highest temperature in an engineered geothermal system, 629 °F (331°C), at Newberry, Oregon, unlocking the potential to generate significantly more energy from fewer wells, use less land, water and capital, and thereby, lower the cost of power. By integrating advanced drilling technologies, reservoir development, diagnostics, and heat-harvesting technologies, Mazama is building a robust platform to make superhot rock geothermal a scalable source of carbon free, reliable and affordable power worldwide.
| Date | Amount | Type | Investors | Valuation |
|---|---|---|---|---|
| 09/24/26 | $135,000,000 | Series B |
Centaurus Capital![]() ConocoPhillips Doerr Capital ![]() Gates Frontier H. Barton Asset Management Jeffrey and Marieke Rothschild Foundation Khosla Ventures Shell Ventures SiteGround | undisclosed |