Today’s article in The Fusion Report is an update on Commonwealth Fusion Systems (CFS) and their progress so far in 2026. As a reminder, CFS was founded in 2018 as a spin-out from MIT, focused on commercializing tokamak-based nuclear fusion using high-temperature superconducting magnets. Headquartered in Devens, Massachusetts, CFS is developing the SPARC experimental tokamak to demonstrate net energy gain, with the goal of using this platform to inform its first commercial ARC fusion power plant in Virginia in the early-2030s. The company has raised several billion dollars in private funding and is considered one of the world’s largest private fusion developers, reflecting strong investor confidence in its magnet technology and roadmap.

CFS is developing a compact, high-field tokamak called SPARC as its first net-energy fusion demonstration device, with first plasma expected later this year. SPARC is being built at the company’s campus in Devens, Massachusetts, and is designed to use high-temperature superconducting (HTS) magnets to generate very strong magnetic fields in a relatively small machine, enabling plasma temperatures above 100 million degrees Celsius and an expected fusion power output in the range of 50–100 megawatts with a fusion gain greater than 10.

CFS expects SPARC to demonstrate net fusion energy in 2027, providing the physics and engineering proof-of-concept that fusion can produce more power than it consumes in a commercially relevant configuration.

Following SPARC, CFS plans to deploy its first-of-a-kind commercial power plant called ARC, which will be a commercial grid-connected fusion power station near Richmond, in Chesterfield County, Virginia. 

ARC is planned as a roughly 400-megawatt electric plant, using a SPARC-derived compact tokamak with HTS magnets to provide steady, zero-carbon electricity (enough to power on the order of 150,000–300,000 homes or large industrial loads), and is targeted to begin supplying power to the grid in the early 2030s. CFS intends to independently finance, build, own, and operate ARC at the James River Industrial Park site, in collaboration with Dominion Energy Virginia for site and grid expertise, with expectations of creating hundreds of jobs and using this first plant as the template for “thousands” of similar reactors to accelerate a global clean-energy transition.

CES Announcements

CFS used the Consumer Electronics Show (CES) 2026 to showcase fusion energy to the larger non-fusion world as a near-term, commercial technology rather than a distant science project. At the show, CFS highlighted that the first of 18 powerful superconducting magnets has been installed in SPARC. CES, which happens yearly in Las Vegas, typically has been used to highlight new technologies in consumer electronics. Since roughly 2020, CES has included new technologies such as electric vehicles and the cloud as they impact the world of consumer electronics.

CFS also announced collaborations with Siemens and NVIDIA to build a digital twin of SPARC using Siemens’ Xcelerator industrial software and NVIDIA’s Omniverse and AI models, with the goal of compressing years of physical experimentation into weeks of virtual optimization and accelerating the route from design to grid-connected fusion power. A visual illustration of this digital twin was unveiled at CES, and CFS leadership joined Siemens’ keynote and show-floor presence to position fusion as “the next big thing in tech” and to introduce mainstream consumer and tech audiences to fusion’s potential to provide clean, essentially unlimited energy for applications ranging from EV charging to AI data centers.

CFS Board Continues to Grow with New Independent Members

This year also saw CFS add a new independent member to its board of directors. Stéphane Bancel, the Chief Executive Officer of Moderna Inc., has served as Moderna’s CEO and as a member of the company’s board since 2011. He is best known for leading Moderna’s effort in early 2020 to focus on the successful development of one of the first COVID-19 vaccines in record time under Operation Warp Speed. He is also a partner in Flagship Pioneering, the life science-focused venture capital firm that helped to launch Moderna. Previously, Bancel spent five years as the CEO of bioMerieux SA, a French diagnostics company, and he also served in leadership roles at Eli Lilly & Co. Bancel was also an early investor in CFS.

“I am pleased to have the opportunity to work with the CFS team to unlock fusion’s promise of abundant energy at a time of unprecedented demand for power worldwide,” Bancel said. “The CFS team has the passion for the science, as well as the engineering and execution – all of the pieces needed to scale. The company is at the forefront of an emerging industry that will introduce a new era of energy independence and security, and I look forward to being a part of it.” Bancel is the second new member to join CFS’ board. Chris Liddell, a former White House official who has also served as CFO at Microsoft Corp. and General Motors Co., recently also joined as an independent board member.