Shares in the first publicly traded fusion-energy company soared 25% to close at $13.76 on their second day of trading on Tuesday.

Canada's General Fusion, whose backers have included Jeff Bezos, went public through a SPAC merger with Spring Valley Acquisition Corp. III., riding a wave of increasing power demand and public interest in fusion energy. Shares started trading on Monday under the ticker GFUZ.

The merger gives the company around $150 million in cash, which Greg Twinney, chief executive of General Fusion, said in an interview was the funding needed to hit scientific milestones with its demonstration machine. General Fusion aims to deliver a commercial fusion plant around 2035.

"Getting the capital to continue to execute that program, hit those milestones was a big win, and doing it in the public markets allows us to bring a broader set of investors along with us and have the public markets as the platform to communicate our progress," Twinney said.