Sam Altman announced the $500 billion Stargate initiative at the White House last month, with a plan to build the world's largest AI infrastructure project. Stargate, the $500 billion effort to ...

Helion Energy Inc., a startup working to develop commercial fusion reactors, today announced that it has closed a $425 million late-stage funding round. The Series F deal included the ...

Polaris, Helion’s seventh prototype, sits inside a 27,000-square-foot building in Everett, Washington. It took more than three years to build, which is quick by fusion industry standards.

US-based Helion Energy recently unveiled its latest prototype in Everett, Washington, before announcing a $425 million funding round this week. Among the investors was Mr Altman, who has ...

Helion, a startup working to generate electricity from nuclear fusion, on Tuesday said it has raised $425 million in venture funding from a group of investors including SoftBank Group's Vision Fund 2.

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 by ...

Fusion energy startup Helion has yet to prove it can generate electricity, but that hasn't stopped investors from dumping another $425 million into the venture.… Helion, whose board is chaired ...

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 ...

Want to keep track of the largest startup funding deals in 2025 with our curated list of $100 million-plus venture deals to U.S.-based companies? Check out The Crunchbase Megadeals Board. This is a ...

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