The company raised $425 million in January 2025, around the same time that it turned on Polaris, a prototype reactor. Helion ...

Few fusion startups have been as closely watched as Helion. The 12-year-old company is backed by Sam Altman, rumored to be in talks with OpenAI, and has a deal to supply Microsoft with electricity ...

Investors are pouring billions into fusion companies, encouraged by breakthroughs that they contend have put a sustained ...

Helion just raised $425 million in fresh funding for its bid to be the first to produce electricity through nuclear fusion. That brings the total investment into Helion to $1 billion, and it's ...

And Helion is not the sole company chasing fusion dreams in Washington state. Zap Energy and Avalanche Energy are also in pursuit of energy’s “Holy Grail” for essentially limitless power.

Fusion energy developer Helion Energy has broken ground on a new facility in Everett, Washington, which will house its seventh generation fusion prototype, known as Polaris. Construction of the ...

The Everett-based company hit a valuation of more than $5.4 billion with the raise. Everett-based fusion energy company Helion on Tuesday raised a $425 million Series F round. The company is now ...

Helion Energy CEO and co-founder David Kirtley talks to Gov. Jay Inslee about Trenta, Helion’s sixth fusion prototype, during a tour of their facility on July 9 in Everett.

It’s a fusion energy company called Helion that recently raised $425 million in a funding round backed by SoftBank. Prior to that it banked $375 million from Altman, who serves as Helion’s ...

Just two years since emerging from stealth, German startup Proxima Fusion has bagged Europe’s largest-ever private investment ...

Polaris, Helion’s seventh prototype, sits inside a 27,000 square-foot building in Everett, Washington. It took more than ...