Valar Atomics raises $1B round led by Sequoia's Shaun Maguire

Valar Atomics confirmed on Monday that it had raised a giant funding round led by Sequoia, putting to rest weeks of speculation about the deal. The startup’s founder and CEO, Isaiah Taylor, announced that the company has raised $1 billion in equity, with Sequoia partner Shaun Maguire joining its board. Valar also secured a $200 million line of credit from Erebor and other banks. The nuclear startup did not disclose its valuation, though Bloomberg reported it at $6 billion.

Valar builds small modular nuclear reactors (SMRs) — essentially miniaturized, factory-built power plants intended to be cheaper and faster to build than traditional reactors. In June, the company demonstrated its Ward 250 reactor successfully powering an Nvidia Blackwell system, according to Valar, and it announced a deal with Nvidia to develop a waterless 30-megawatt AI factory.

Valar says its reactors generate the engineering, manufacturing, and operational data needed to improve next-generation reactors, speeding up its development cycles. “It took two years to complete the NOVA core. It took seven months to take Ward 250 critical. With each reactor built, the tick rate will become smaller until Valar is producing tens, then hundreds, then thousands of reactors per year,” the company said, adding that the new funding will let it reach its next milestone: manufacturing fleets of its SMRs.

Valar is far from the only nuclear startup pursuing such ambitions. Over the past few months, Antares raised $470 million, and X-energy raised $1 billion through its IPO. Valar’s new round also drew participation from Apandion Capital, Atreides Management, Conviction, Dream Ventures, HOF Capital, Point72, Riot Ventures, Snowpoint Ventures, and Valor Equity Partners.

Why it matters

The round signals continued investor appetite for nuclear power as a dedicated energy source for AI infrastructure, reinforced by Valar’s direct partnership with Nvidia to power a dedicated AI factory.