Commonwealth Fusion Systems could go public within two to three years

Commonwealth Fusion Systems (CFS), the best-funded fusion power startup, has raised $4 billion from investors over the last seven years, including the $1 billion the company has raised now. Recent developments, plus rumblings from industry sources, suggest the company might go public within the next two or three years.

One signal is this week’s appointment of Lorence Kim as CFS’s new chief financial officer. Kim was previously CFO at Moderna, the mRNA-therapy biotech, which he joined in 2014 and helped take public in December 2018 before staying on for another year-and-a-half. “Fusion today is where mRNA was a decade ago: scientifically real, commercially yet-to-be-proven, and closer than the consensus thinks,” Kim wrote in a LinkedIn post. He isn’t the first fusion executive with a biotech background — Eric Lander, who helped lead the Human Genome Project, co-founded Pacific Fusion and now serves as its CEO. Christine Dunn, CFS’s head of external communications, told TechCrunch that Kim said his arrival doesn’t necessarily mean IPO preparations are underway.

Moderna took four-and-a-half years to IPO after Kim joined it, but CFS is likely to go public sooner than that. Unlike Moderna’s human therapies, which require lengthy, costly FDA clinical trials because human lives are at stake, fusion carries lower safety risk than fission — fusion reactors fizzle out rather than melt down — so federal regulators have given the fusion industry guidelines distinct from fission’s, giving CFS more control over its own timeline.

CFS is also making steady progress on Sparc, its demonstration reactor. The company once hoped to have it running by 2025; it is now targeting a launch later this year. By next year, CFS hopes Sparc will achieve scientific breakeven — producing more energy from a fusion reaction than was required to start it, a milestone only one experiment has reached so far. CFS has also begun work on Arc, its commercial-scale power plant, selecting a site in Chesterfield County, Virginia, and starting to receive permits; it hopes to have Arc running in the early 2030s. CFS has already sold half the output of its first power plant to Google.

Other fusion startups are moving toward public markets too: General Fusion went public via a SPAC deal earlier this month, and TAE Technologies will do so by merging with Trump Media and Technology Group.

Why it matters

A public listing would give CFS capital to sustain the heavy spending fusion demands before commercialization, at a moment when the AI data-center boom has sharply increased demand — and investor appetite — for new power sources.