DEVENS, Mass. and TOKYO (Sept. 30, 2026) — Commonwealth Fusion Systems, a leading developer of fusion energy, today announced a landmark supply agreement for high-temperature superconducting tape with Fujikura Ltd. as it accelerates the commercial rollout of its grid-scale ARC fusion power plants. HTS tape serves as the vital raw building block for winding next-generation, ultra-high-field superconducting electromagnets critical to its fusion systems.
CFS agreed to purchase more than 10,000 km (3 GA-m) of HTS tape from Fujikura that the company will use in the development of its ARC power plants, starting with the first one being developed at the Fall Line Fusion Power Station in Chesterfield County, Virginia. Fujikura is investing in the expansion of its manufacturing capacity to enable the delivery of the HTS tape at scale. The agreement is the largest of its kind for HTS tape, said the companies.
HTS tape contains a thin microscopic layer of rare earth barium copper oxide ceramic superconductor which, when cooled, can carry massive electrical currents with zero electrical resistance and no energy loss. About the width of a fingernail and thinner than a human hair, the tape is wound into dense coils that can can generate massive magnetic fields exceeding 20 tesla, some 13 times the strength of standard medical resonance imaging machines yet not requiring such extensive cooling infrastructure. The powerful electromagnets are needed to contain the plasma the tokamaks of fusion energy systems.
“This partnership with Fujikura demonstrates how we’re actively placing orders and getting ready to execute our ARC power plant once our SPARC fusion machine achieves Q>1,” said Bob Mumgaard, CEO of Commonwealth. “We’re pleased to find partners like Fujikura that understand our manufacturing priorities, share our sense of urgency, and are willing to make the investments necessary to help us scale so that together we can meet future demand for this crucial energy source worldwide.”
“With this agreement, Fujikura will continue to strengthen its position as a key supplier of HTS tape for ARC power plants while building a long-term business platform for the 2030s and beyond, when commercial fusion power plants are expected to begin operation,” said Naoki Okada, Representative Director, President and CEO of Fujikura Ltd. “Through these efforts, Fujikura aims to help support a sustainable energy future.”
In another recent development, Commonwealth disclosed that Hyundai Motor Group became an investor during the company’s recent $1 billion fundraise, marking what is characterized as the first step in a partnership between the companies as they explore avenues of collaboration on future ARC power plants.
“As we prepare to put fusion energy on the grid in the early 2030s, we see partnerships with leading industrial and energy companies like Hyundai as an important component to helping us scale our ARC power plant business,” said Bob Mumgaard, CEO and Co-founder of CFS. “We look forward to exploring collaboration opportunities with Hyundai given their expertise and track record of building power plants in Korea and around the world.”
Hyundai’s investment in CFS demonstrates the broadening diversity and maturity of its investor base, as it progresses in the assembly of its SPARC fusion demonstration machine and parallel development of its first ARC power plant in Virginia. Hyundai joins a growing number of investors in the Asia-Pacific region that support CFS in commercializing fusion energy, including Woori Venture Partners in Korea; a consortium of Japanese industrial companies led by MITSUI & CO., Ltd., and Mitsubishi Corporation; Temasek of Singapore; and Hostplus Superannuation Fund in Australia. Hyundai and CFS say they will explore actions to support fusion energy in Korea, consistent with Korea’s prioritization of fusion under the 7 SEED initiative to advance major new technologies.
“Fusion energy has the potential to play an important in addressing growing global energy demand while supporting a more sustainable future,” said Hokeun Chung, Executive Vice President of Hyundai Motor Group. “CFS has demonstrated strong technical progress toward commercial fusion energy, and we look forward to exploring opportunities to contribute our industrial, engineering and infrastructure expertise as the industry advances.”
The $1 billion capital raise was the single largest funding round among fusion energy companies worldwide since CFS announced its $1.8 billion Series B round in 2021. To date, CFS has raised $4 billion, representing about 30% of the total capital raised by the fusion industry and reinforcing CFS’ position as the world’s largest and leading fusion company. See www.cfs.energy.
