Commonwealth Fusion SystemsIn Development
CFS' first planned grid-scale commercial fusion power plant, designed to deliver about 400 MW of clean electricity using the HTS magnet and tokamak stack proven through SPARC. The project is officially named the Fall Line Fusion Power Station and is planned for a 100-acre site at the James River Industrial Center in Chesterfield County, Virginia.
Latest update Sep 7, 2026
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Has not broken ground, but local land-use approval is secured: the Chesterfield County Board of Supervisors granted final zoning/conditional-use approval in September 2025, and in April 2026 CFS became the first fusion company to file a grid interconnection request with PJM Interconnection, the largest U.S. wholesale electricity market (a process PJM typically runs 4-6 years). The plant is locked in with a 200 MW PPA from Google and a $1B+ offtake agreement with Eni; CFS still targets the early 2030s for first electricity delivery and a 20-year operating life.
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Announced next steps from Commonwealth Fusion Systems that mention ARC (Fall Line Fusion Power Station).
2026-2032
Local land-use approval is already secured (Chesterfield County granted final zoning/conditional-use approval in September 2025). The remaining long-lead item is PJM Interconnection's multi-year (roughly 4-6 year) engineering study and approval process for the April 2026 grid-interconnection request, alongside locking down the final ARC plant design ahead of construction later this decade.
2026+
Execute the April 2026 Realta Fusion long-term HTS magnet supply agreement and turn the Type One Energy licensing deal, WHAM magnet supply, and Realta partnership into a recurring magnet business that funds the fusion roadmap before SPARC and ARC reach revenue.
2027-2028
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Commonwealth Fusion Systems said it agreed to buy more than 10,000 km (3 GA-m) of high-temperature superconducting tape from Japan's Fujikura for ARC plants, starting with Fall Line in Chesterfield County, Virginia. CFS and Fujikura called it the largest HTS tape order of its kind; Fujikura is expanding manufacturing in Japan and CFS did not disclose financial terms. Chief science officer Brandon Sorbom told Khaleej Times deliveries could begin in one to two years and that SPARC uses about 1.5 GA-m of tape, roughly half the new order.
Commonwealth Fusion Systems said on September 16 that SPARC's full cryogenic system has run at its 8 kelvin operating temperature, the point at which the tokamak's high-temperature superconducting toroidal field magnets are cold enough to hold a plasma without quenching. The plant feeds three supercritical helium loops at 8, 15 and 80 kelvin and is essentially the same hardware CFS plans to use at its 400 MW ARC plant in Chesterfield County, Virginia. The company framed the result as part of commissioning ahead of the dry dress rehearsal, an integrated test that runs every SPARC support system as if a fusion pulse were happening without the tokamak itself.
Commonwealth Fusion Systems said Hyundai Motor Group joined its July 2026 $1 billion equity raise, keeping total capital raised at about $4 billion. The investment is the first step toward collaborating on CFS's ARC commercial fusion plant and exploring fusion in Korea under the 7 SEED initiative. Hyundai is a newly named participant in the existing raise, not a separate new round.
Commonwealth Fusion Systems announced on July 30 that it closed $1 billion in additional equity financing from institutional investors, including pension funds, sovereign wealth funds and infrastructure partners, bringing its total capital raised to $4 billion, the largest total of any fusion company. CEO Bob Mumgaard said the funds will finish assembly of the SPARC demonstration tokamak in Devens, Massachusetts, which is about 80% complete, and fund planning for the ARC commercial power plant in Virginia.
Commonwealth Fusion Systems said a global team of scientists has published five peer-reviewed papers in a special issue of the Journal of Plasma Physics validating the physics of ARC, its planned first commercial-scale fusion power plant, building on lessons from its SPARC demonstration tokamak. The Gates- and Nvidia-backed company, which has raised nearly $3 billion, is targeting the early 2030s to feed about 400 megawatts onto the grid from its ARC plant in Chesterfield County, Virginia - enough to power roughly 280,000 homes - and has begun the interconnection process. Some outside researchers cautioned that data from an operating reactor is still needed to confirm the predictions.
Commonwealth Fusion Systems on June 4 published a five-paper ARC Physics Basis in a special issue of Cambridge University Press' Journal of Plasma Physics, the most detailed public scientific case yet for a commercial-scale tokamak power plant. The papers use SPARC design lessons and state-of-the-art tools to project that ARC - CFS' planned Fall Line Fusion Power Station in Chesterfield County, Virginia - can produce roughly 1.1 GW of fusion power and deliver about 400 MW of continuous net electricity to the grid, validating the physics path to first electricity in the early 2030s.
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Helion Energy
7th-generation fusion prototype designed to demonstrate electricity production from fusion using Helion's pulsed magneto-inertial architecture and direct electricity recapture.
Helion Energy
First commercial fusion power plant, designed to generate 50+ MWe. Located in Malaga, Chelan County, Washington, on land leased from Chelan County PUD near Rock Island Dam. Power will be marketed by Constellation Energy to Microsoft data centers.
TAE Technologies
TAE's streamlined fusion research machine that forms field-reversed-configuration plasmas using only neutral beam injection, reducing reactor size, complexity, and cost versus Norman while preserving the path to commercial hydrogen-boron fusion.
TAE Technologies
TAE's first prototype commercial fusion power plant, designed to deliver net electrons to the grid from the company's hydrogen-boron fusion pathway and serve as the bridge to later utility-scale plants.
