The fusion company said the round broadens its investor base beyond venture capital and will be used to advance ARC, its planned commercial power plant in Virginia.
Commonwealth Fusion Systems said it raised $1 billion in new funding, bringing its cumulative total to more than $4 billion and marking the largest single financing round for a fusion company since its own $1.8 billion raise in 2021. The company said the latest round accounts for roughly 30% of all private capital raised by the global fusion industry to date. CFS said the investor base widened beyond traditional venture capital to include pension funds, sovereign wealth funds, infrastructure investors and strategic industrial investors, a shift the company framed as evidence that fusion is increasingly being treated as a long-term infrastructure asset rather than only an emerging technology. The company said all of the newly raised capital will be directed to ARC, its planned commercial fusion power plant in Chesterfield County, Virginia, including supply-chain buildout, production expansion and site preparation. SPARC, the demonstration reactor under construction in Massachusetts, is about 80% complete and is targeting initial operation within the next year. CFS said ARC is aimed at grid connection in the early 2030s, though Mumgaard also said completion is targeted for the mid-2030s and will require billions more in funding. CFS recently completed its grid interconnection application with PJM and said it has signed power purchase agreements with Dominion Energy, Google and Eni covering more than half of ARC’s planned electricity output. The company also said the financing is not pre-IPO funding, with newly appointed CFO Lawrence Kim saying private markets remain sufficient for now.