
Helion Energy, a Seattle-based startup focused on nuclear fusion, has successfully raised $425 million in a Series F funding round. The investment round was led by notable backers including Sam Altman, SoftBank, and Lightspeed Venture Partners, along with a major university endowment and returning investors such as Mithril Capital and Capricorn Investment Group. The funds will be utilized to develop a fusion reactor intended to supply electricity to Microsoft by 2028, positioning Helion to potentially deliver clean energy ahead of its competitors. This funding marks a significant step in the race for advanced nuclear technology and clean energy solutions, as the U.S. seeks to maintain its leadership in this field amidst growing competition from countries like China, which is also making strides in fusion energy development.


Fusion energy requires massive funding, hard-to-find talent, and coordination. China’s state-private symbiosis—spanning R&D, manufacturing, and deployment—might give it an edge over the US in the commercialization race. Read more in our latest analysis. https://t.co/eVNw0hlNCG
China’s ‘Artificial Sun’ reactor set a new record, sustaining high-confinement plasma for over 1,000 seconds—a major step toward limitless fusion energy. Learn more with Capitol https://t.co/W8DFplfAAA
The race to dominate nuclear technology is heating up, marking a pivotal moment for America’s energy independence, national security, and global technological leadership. Discover how the U.S. can outpace competitors like China while advancing clean, reliable energy innovation.… https://t.co/pdcH0mYfGs