Aalo Atomics Achieves Criticality Milestone; Meets Executive Order Goal

From Founding to Fission in Less than Three Years, Aalo on Track to Become the Preeminent Nuclear Power Source for Modern AI Data Centers

AUSTIN, Texas--(BUSINESS WIRE)--Aalo Atomics, the company building fully modular nuclear plants to power modern AI data centers, demonstrated criticality for its Aalo-X Critical Test Reactor in the early morning hours of July 4, 2026 at Idaho National Laboratory (INL), meeting President Trump’s July 4th goal for companies in the U.S. Department of Energy’s Reactor Pilot Program. Criticality, which marks the first self-sustaining chain reaction within a nuclear fission reactor, was achieved under Department of Energy (DOE) authorization.

“Reaching criticality is our most significant milestone to date, as it paves the way for the deployment of the Aalo Pod to power commercial data centers once it receives authorization from the Nuclear Regulatory Commission,” said Matt Loszak, CEO, Aalo Atomics. “More importantly, the Aalo-X Critical Test Reactor has the same full-scale core components as our commercial reactors. The Aalo-X’s 10 MWe reactor design positions it as the premier power provider for the modern data center.”

“Last month I toured the Aalo facility at Idaho National Laboratory and was impressed by the company’s determination to successfully demonstrate their technology by the Fourth of July,” said U.S. Energy Secretary Chris Wright. “President Trump asked for three advanced reactors to be authorized and achieve criticality before the 250th anniversary of our great country. I’m pleased to share that through the dedication and hard work of Aalo, INL and DOE, we have surpassed that ask and delivered four!”

Underscoring Aalo’s commitment to meeting the power needs of today’s data centers, the company has already begun work on its second nuclear reactor (located next to the Aalo-X test reactor at INL) for Project Ascension, testing a commercial-scale system that will produce electricity and power for an on-site data center in the coming months. In addition, Aalo recently announced a collaboration with Microsoft and Nvidia to lay the groundwork for an automated co-piloting system that could transform how a fleet of nuclear reactors operates safely.

“Aalo has demonstrated unprecedented speed, as well as a commitment to quality and safety, in bringing its first nuclear reactor to life, but now is not the time for rest,” said Yasir Arafat, President & CTO, Aalo Atomics. “Criticality is just the beginning. In the coming months we will continue building and testing multiple reactors, including the commercial Aalo Pod design which in the next 18 months will provide a scalable and affordable power option to data centers and enterprises.”

Fuel rods for the Critical Test Reactor were fabricated by GE Vernova’s nuclear fuel business, Global Nuclear Fuel (GNF), and delivered to the site in early April. Once Aalo completed its Readiness Assessment and Secretary of Energy Chris Wright signed the final approval to load fuel, Aalo was able to “flip the switch” and achieve criticality. Aalo’s celebration was intentionally reminiscent of Chicago Pile-1 (CP-1), the first self-sustaining, controlled nuclear chain reaction that occurred 84 years ago on December 2, 1942. CP-1 represents the birth of nuclear reactors, and today INL is the leading U.S. site for developing and testing them.

Aalo will be holding a commemorative event to celebrate its criticality milestone in Idaho Falls on July 30, 2026.

About Aalo Atomics

Aalo Atomics, based in Austin, Texas, builds nuclear reactors to power modern AI data centers. Founded in 2023, Aalo has secured over $136M in funding to date from multiple investors, including Valor Equity Partners, 50Y, Fine Structure Ventures, Hitachi Ventures, NRG Energy, Vamos Ventures, Tishman Speyer, Kindred Ventures, Harpoon Ventures, Crescent Enterprises, Crosscut, Alumni Ventures, MCJ, Gaingels, and Nucleation Capital, among others. To learn more, visit www.aalo.com.