Valar Atomics

Nuclear Energy · AI Infrastructure · Climate Tech

Funding

Valar Atomics reportedly in talks for $1B raise at $6B valuation

A 100-kilowatt demonstration reactor just tripled its backers' price tag, showing how desperate AI data centers are for firm power.

• Valar Atomics is in talks to raise about $1 billion at a $6 billion valuation, with Sequoia Capital expected to lead, according to TechCrunch and The Information.
• The three-year-old, El Segundo-based startup builds small modular nuclear reactors — factory-built, helium-cooled high-temperature gas reactors meant to be cheaper and faster to deploy than traditional plants.
• Part of the new round builds on capital already raised: $450 million ($340M equity, $110M debt) at a $2 billion valuation in March, per a Bloomberg report cited by TechCrunch.
• On June 18, 2026, Valar's Ward250 reactor went critical at its Utah test site, generating about 100 kilowatts — reportedly the first startup-built reactor to produce nuclear power.
• Days later, Valar powered a live Nvidia Blackwell system at a small Utah site and unveiled a partnership with Nvidia exploring a ~30-megawatt, near-waterless data center paired with its reactors.
• The round is reportedly structured across multiple tranches at varying valuations, a pattern increasingly common in AI-era fundraising that can obscure the true price different investors pay.
• Nuclear microreactors are becoming a serious venture bet as data center power demand outpaces utilities' ability to add grid capacity, turning long-stalled nuclear tech into AI infrastructure's next bottleneck fix.