Valar Atomics is pioneering the Gigasite model — massive industrial campuses powered by fleets of high-temperature gas reactors for hydrogen production, AI data centre power, and synthetic fuels. Having achieved the first criticality of any SMR startup, Valar has closed a $130 million Series A and is targeting deployment of hundreds of reactors through a vertically integrated model that sidesteps utility procurement. The Texas Gigasite is the flagship deployment.