Helion raises $465 million to speed up first fusion plant in Washington

Helion’s first commercial fusion plant is no longer just a promise on paper in Chelan County. Supporting buildings went up on leased land in Malaga in July 2025, the county granted a Conditional Use Permit on October 15, 2025, and the company is now using a fresh $465 million to see whether Orion can stay on track for grid power in 2028.

The Series G round values Helion at $15.5 billion and lifts its total capital raised to $1.5 billion. Thrive Capital led the financing, with new investors including Alta Park Capital, Anti Fund, BoxGroup, Lux Capital, Peak XV Partners, and Bill Ford, along with existing backers such as Capricorn Technology Impact Funds, Lightspeed Venture Partners, Mithril Capital, Good Ventures Foundation, SoftBank Vision Fund 2, and a university endowment fund. For Helion, the money is not just a trophy valuation. It is fuel for a hardware build that now has land, a permit, and a customer all pointed at the same deadline.

That customer is Microsoft, which agreed in 2023 to buy electricity from Helion’s first fusion plant. The deal called for delivery in 2028, after a one-year ramp-up, with the plant targeting 50 MW or more. Constellation Energy was named as the power marketer and transmission manager for the project, and Microsoft’s Kevin Scott has said the company wants to be the first consumer of the energy because of its data-center power needs. In a field where many projects still live in labs and slide decks, that commercial link is the kind of hard constraint fusion companies spend years chasing.

Helion’s pitch to reach that point is unlike the tokamak path most people picture when they hear “fusion.” The company says it uses deuterium and helium-3 in field-reversed configuration plasmas, accelerates two FRCs toward each other, then compresses them with a strong magnetic field to temperatures above 100 million degrees Celsius. As the plasma expands after fusion, Helion says the changing magnetic field induces an electrical current that is directly recaptured as electricity, a design it believes can cut complexity and capital cost. The company says it has built seven fusion prototypes on the road to commercialization, including Grande, Venti, Trenta, and Polaris.

That is why Orion matters as a credibility test, not just a financing story. The next milestones are visible ones: more site work in Malaga, more structures on the Chelan County PUD land, the equipment needed to assemble a power plant, and the grid and transmission steps that have to line up behind the reactor itself. Chelan County Commissioner Kevin Overbay has already praised the company’s community outreach, and Central Washington is now waiting to see whether Helion’s machine can do the hardest thing in fusion: become a plant.