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X-energy designs small modular nuclear reactors and the fuel they run on, aiming to sell clean, steady power to utilities and industrial customers.
X-energy is a nuclear power company building a different kind of reactor. Instead of the giant, billion-dollar plants that take a decade to construct, it designs small modular reactors — factory-built machines meant to be assembled on site and grouped together like power blocks. It also makes the fuel those reactors run on, a special kind called TRISO-X that wraps tiny uranium kernels in layers of ceramic and carbon so they hold together even at extreme heat. The pitch is steady, carbon-free electricity that can sit next to a factory or plug into a grid, without the meltdown risk of older designs.
The company is early-stage. It has no reactors generating revenue yet, so it survives on cash from investors, government support, and customers who pay to reserve future plants. Its order book includes a deal with Amazon's cloud arm to supply power, and a project with Dow Dow to build a reactor at a chemical plant on the Gulf Coast. The U.S. government has also put money behind the technology, because Washington wants reliable clean power that isn't dependent on weather or foreign fuel. The bet is that nuclear's old problem — huge upfront cost and endless construction delays — can be solved by making reactors small, standardized, and repeatable. Get one design approved and build it many times, and the cost per plant falls. Regulators still have to sign off on the design, factories have to be built, and customers have to be willing to be first. That is the hard part, and it is why the company is still burning cash rather than earning it.
The company listed on NASDAQ in 2026 after merging with a blank-check company, a route that gave it public capital without a traditional IPO. Its founders come out of the nuclear and defense world, and the fuel business may matter as much as the reactors — other reactor makers could buy TRISO-X fuel too. The risk is real: timelines slip, costs overrun, and a single safety problem could set the whole industry back. But if small reactors work, X-energy is one of the few companies positioned to sell both the machine and the fuel.
Saved answer · last researched 15 Nov 2026