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Commonwealth Fusion Systems

MIT spinout developing magnetic-confinement fusion reactors, including its SPARC demonstration and planned ARC power plant.

Current stories

investOne report1 publisher

X-energy's halved shares test the exits behind nuclear's record $6 billion funding year

Investors have put more than $6 billion into nuclear fission and fusion startups in 2026, a record by Crunchbase's count. The IPO market those investors would one day sell into has marked most recent nuclear listings far below their peaks.

Reality

Evidence55
Adoption15
Hype gap+30
Incentives35
Confidence55
productOne report1 publisher

Hyundai joins Commonwealth Fusion's $1 billion round to explore engineering ARC power stations

Hyundai Motor Group's money closed inside a $1 billion raise at Commonwealth Fusion Systems, and the engineering work on ARC power stations is still described as something the two companies will explore. The amount and the scope were not disclosed.

Reality

Evidence38
Adoption28
Hype gap+30
Incentives68
Confidence45
productOne report1 publisher

Fortum hangs the undecided €800m of its Loviisa extension on a 20-year Google offtake

The Finnish utility says a Google power contract is what lets it keep committing money to running two 1970-vintage reactors to 2050. Most of the capital behind that plan has not yet been approved.

Reality

Evidence57
Adoption48
Hype gap+22
Incentives74
Confidence55
productOne report1 publisher

Madison Gas and Electric invests in Realta Fusion to explore a 200MW plant for the mid-2030s

The Wisconsin utility put money into Realta Fusion and offered it somewhere to plug in, for a plant that would not run until the mid-2030s. That is a wager on how short of power the next decade gets.

Publishers:techcrunch.com

Reality

Evidence48
Adoption20
Hype gap+35
Incentives62
Confidence45
investOne report1 publisher

Corporate venture arms are writing deep tech's first purchase order

Google committed to 200 MW from Commonwealth Fusion's first plant and RWE put EUR 25m behind Proxima Fusion next to a shut-down reactor site, deals where the access mattered more than the valuation. Only one of them involves a signed purchase.

Reality

Evidence36
Adoption31
Hype gap+22
Incentives68
Confidence44