The company will use the investment to complete its SPARC demonstration reactor and advance the ARC commercial fusion power plant. Funding Strengthens Commercial Fusion AmbitionsCommonwealth Fusion Systems raised $1 billion in new equity funding for commercial fusion power development initiatives. The Boston company aims to operate a full-scale fusion power plant commercially in the near future. ARC is expected to become one of the world’s first commercial grid-scale fusion power plants successfully. CFS said SPARC’s physical demonstration marks the next major engineering milestone toward commercial fusion electricity generation worldwide.