Mazama Energy announced $135 million in new capital to accelerate superhot rock geothermal commercial development, including an oversubscribed Series B led by Centaurus Capital, founded by John Arnold, and Doerr Capital. ConocoPhillips and Shell Ventures joined the round, with repeat investment from Khosla Ventures and Gates Frontier. Additional investors include SiteGround Capital, H. Barton Asset Management, and the Jeffrey and Marieke Rothschild Foundation.