FUSION FUNDING

Commonwealth Fusion Systems announced on July 30, 2026 that it raised $1 billion of additional equity financing, which the company says is the largest single funding round among fusion energy companies since its own $1.8 billion Series B round in 2021. With this capital and the $863 million raised last year, CFS says its total stands at $4 billion, or about 30 percent of all capital raised by the fusion industry to date. The round drew institutional investors including pension funds, sovereign wealth funds, infrastructure investors, and industrial corporate partners rather than traditional venture capital. CFS also hired former Moderna chief financial officer Lorence Kim as its new CFO, a signal that more fundraising for its ARC power plant is still ahead. The company says it remains on track to put power on the grid in the early 2030s from the Fall Line Fusion Power Station in Chesterfield County, Virginia.

Helion Energy closed a $465 million Series G led by Thrive Capital at a $15.5 billion post-money valuation, the largest fusion VC round of 2026. The raise brings Helion’s lifetime private funding to $1.5 billion and makes it the second most funded fusion company after Commonwealth Fusion Systems. The capital will expand U.S. manufacturing capacity and support deployment of Orion, the company’s first power plant, now under construction in Malaga, Washington.