Valar Atomics, a nuclear energy startup, has closed a $1 billion Series B round led by Sequoia Capital, giving the company a post-money valuation of $6 billion. The company said the new capital will go toward scaling production of its small modular reactors, with a stated focus on supplying baseload power to AI data centers. Founded in 2023, Valar Atomics is developing high-temperature gas-cooled small modular reactors. The latest round comes only months after the company raised $450 million in early 2026, when it was valued at $2 billion. With the new financing, that valuation has increased to $6 billion. Sequoia partner Shaun Maguire is also set to join the company’s board, according to CryptoBriefing.
Valar Atomics has closed a $1 billion Series B financing round led by Sequoia Capital, valuing the nuclear energy startup at $6 billion post-money.
The company said it will use the funds to expand production of small modular reactors. Its stated goal is to supply baseload power for AI data centers.
Founded in 2023, Valar Atomics is developing high-temperature gas-cooled small modular reactors. The new round arrives just months after the company raised $450 million in early 2026, when it was valued at $2 billion. Its valuation has now risen to $6 billion.
Sequoia partner Shaun Maguire will join the company’s board, according to CryptoBriefing.
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