Sequoia Capital just wrote a billion-dollar check for a nuclear energy startup. That sentence alone tells you how dramatically the energy conversation has shifted in the last two years.
Valar Atomics, a company founded in 2023 by CEO Isaiah Taylor, closed a $1 billion Series B equity round led by Sequoia, pushing its valuation to $6 billion post-money. The round also included a $200 million credit facility from Erebor and other lenders, giving the company a total war chest of $1.2 billion to move from prototype to production.
From demo to factory floor
The company develops high-temperature gas-cooled small modular reactors, or SMRs, that use TRISO fuel and helium coolant. In English: these are compact nuclear reactors that run on extremely durable fuel particles encased in ceramic layers, cooled by an inert gas instead of water. The design is meant to be safer, simpler, and most importantly, standardizable.
Valar’s approach centers on what it calls “gigasites,” clusters of these reactors deployed together to provide massive amounts of power. The target customers are AI data centers, industrial facilities, and hydrogen production plants that need reliable baseload energy without depending on the traditional grid.
