Microsoft CorporationMicrosoft signed a power purchase agreement with Helion Energy for fusion power, supporting its AI data center energy needs.

Global private investments in nuclear fusion hit a record $4.48 billion in 2025, a 69% surge driven by AI data center energy demands and rising energy security concerns. The Fusion Industry Association reports that about 71% of fusion companies now expect to deliver commercial power to the grid by the 2030s, with firms inking site selections and power purchase agreements with major tech companies. Helion Energy signed a binding power purchase agreement with Microsoft for at least 50 megawatts by 2028, backed by a $465 million Series G round that valued the company at $15.5 billion, and broke ground on its Orion facility in Washington. Commonwealth Fusion Systems raised $863 million in an oversubscribed Series B2 round, bringing its total funding to nearly $3 billion, to develop its SPARC demonstration device and design the ARC commercial plant in Virginia. Proxima Fusion raised €411 million, becoming Europe's best-funded fusion company at a €2.4 billion valuation, with Google and RWE each contributing €25 million to accelerate its stellarator-based Alpha demonstrator near Munich.
Microsoft CorporationMicrosoft signed a power purchase agreement with Helion Energy for fusion power, supporting its AI data center energy needs.
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NVIDIA Corporation
Constellation Energy Corp
RWE AGCommonwealth Fusion Systems raised $863 million in Series B2, bringing total funding to nearly $3B.
Helion Energy raised $465 million Series G at $15.5B valuation and signed a PPA with Microsoft.
Proxima Fusion raised €411 million at €2.4B valuation, becoming Europe's best-funded fusion company.