Valar Atomics Raises $1 Billion and Triples Its Valuation to $6 Billion

On August 3, Valar Atomics announced a $1 billion Series B round led by Sequoia Capital to mass-produce its Ward 250 microreactor, a 5-megawatt (MW) helium-cooled unit. The Torrance, California-based company was valued at $6 billion, triple its previous round, according to Bloomberg.

Electricity demand from artificial intelligence (AI) data centers is drawing private capital toward a new generation of modular nuclear reactors, a segment seeking to become a supply option for capacity-constrained grids. The milestone comes as small modular reactor (SMR) developers still must demonstrate their technology is cost-competitive with larger-scale units. For Latin America, the round signals where North American energy capital is flowing: a factory-based production model for low-power reactors aspires to reach markets where the electrical grid and water availability are limiting factors.

The design, cooled with helium rather than water, is intended for factory assembly and has not yet received approval from the U.S. Nuclear Regulatory Commission (NRC). In June, the prototype achieved self-sustained criticality and, one week later, that electricity powered an Nvidia chip, according to the company's announcement. The round also includes a $200 million credit line led by Erebor Bank with JPMorgan participation. The funds will finance the transition from operating a demonstration reactor to producing serial fleets, including in-house fuel manufacturing. Competitors backed by major tech companies, including Google-backed Kairos Power and Amazon-invested X-energy, are advancing in parallel.

The next milestone to watch is NRC design approval for the Ward 250, the condition for commercial deployment, and the first order of a serial fleet. Valar Atomics maintains a 30-megawatt waterless nuclear installation project in Utah with Nvidia, which will serve as a market test for the factory production model.

This article was written with artificial intelligence assistance from verified sources and reviewed by a human editor before publication.