Valar Atomics secures $450 million at a $2 billion valuation to fuel AI through small nuclear reactors.

      Isaiah Taylor was just sixteen when he recognized a significant issue in the nuclear industry: the size of reactors. It wasn't that they were overly dangerous or costly, although they are, but rather that their scale was simply too large. The massive multi-gigawatt structures from the Cold War era that remain in the American landscape were built for a power grid designed to transmit electricity from distant plants to remote cities. They were never intended to be installed behind the fence of a hyperscaler, supplying power to clusters of GPU racks that have a growing demand every eighteen months.

      Now 27, Taylor established Valar Atomics in 2023 with the aim of creating something different. On Tuesday, the El Segundo, California startup announced it has secured $450 million at a valuation of $2 billion, as reported by Bloomberg. This financing round consists of $340 million in equity and $110 million in debt, coming just five months after a $130 million Series A that valued the company considerably lower than its current worth.

      The investors include key figures from the U.S. defense tech sector, which has been increasingly generous with funding. Notable investors include Palmer Luckey, founder of Anduril Industries, and Shyam Sankar, Palantir Technologies' chief technology officer. The earlier Series A was backed by Snowpoint Ventures, co-founded by Doug Philippone, who previously led global defense at Palantir, along with Day One Ventures and Dream Ventures. John Donovan, a Lockheed Martin board member and former AT&T CEO, also invested.

      Valar's concept revolves around what it calls "gigasites," large industrial campuses designed to accommodate hundreds or even thousands of small, high-temperature gas-cooled reactors working together. Each reactor utilizes helium as a coolant and TRISO fuel encased in graphite, allowing for operation at significantly higher temperatures than traditional light-water systems. The company asserts these clusters can provide dense, consistent, carbon-free power tailored to meet the requirements of AI data centers, industrial manufacturers, and regions with limited grid capacity.

      This bold proposition addresses an increasingly pressing issue: the future source of electricity. The International Energy Agency forecasts that power consumption from data centers will double by 2026. Goldman Sachs predicts the need for 85 to 90 gigawatts of new nuclear capacity to bridge the gap. Recently, Microsoft, Amazon, and Google have entered nuclear energy agreements, although the reactors necessary for these contracts are not yet available at a commercial scale.

      Valar claims to have a significant lead. In November 2025, the company announced that its NOVA Core achieved zero-power criticality at Los Alamos National Laboratory’s National Criticality Experiments Research Centre, marking it as the first company to reach this milestone under the U.S. Department of Energy’s Nuclear Reactor Pilot Programme, as noted by the Breakthrough Institute. Zero-power criticality—achieving a self-sustaining chain reaction of uranium-235 without reaching full operational temperatures—is an essential validation step, not a fully operational power plant, but Valar has advanced further than most of its competitors publicly.

      The company is now getting ready to operate its Ward250 reactor, a 100-kilowatt thermal high-temperature gas-cooled unit, at the Utah San Rafael Energy Research Centre. In February 2026, the reactor was transported from California to Utah using three C-17 Globemaster military cargo aircraft in a joint initiative by the Departments of Defence and Energy, showcasing rapid reactor deployment capabilities. Valar aims to have it operational by July 4, 2026, the deadline set by the DOE for three reactors under its pilot programme to achieve criticality.

      Taylor's journey has been unconventional even for the deep-tech sector. A self-taught coder, he launched his first venture as a teen and hails from a family with nuclear ties—his great-grandfather, Ward Schaap, was a physicist involved in the Manhattan Project. The Ward250 reactor is named after him. Taylor has built a leadership team that includes Mark Mitchell, a former president of Ultra Safe Nuclear Corporation, and Muhammad Shahzad, the former president and CFO of Relativity Space.

      The competition is fierce and well-funded. TerraPower, supported by Bill Gates, initiated construction on a sodium-cooled reactor in Wyoming last year. Kairos Power is developing a molten-salt demonstration plant in Tennessee, while X-energy has partnered with Dow Chemical for an industrial HTGR. Oklo, which went public via a SPAC in 2024, is working on a fast-neutron microreactor. None of these companies, however, have delivered commercial power from an advanced design thus far.

      Valar has also adopted a confrontational stance on regulation that few young companies would risk. In April 2025, the startup filed a lawsuit against the Nuclear Regulatory Commission, arguing that its licensing framework unfairly restricts innovation in small-scale reactors by requiring the same approval process for low-power test reactors as for full-scale commercial plants.