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Nuclear startup X-energy secured $700 million in Series D funding, bringing its total raised to $1.8 billion. The investment will support supply chain development for small modular reactors (SMRs), with 144 units ordered by major clients like Amazon and Centrica. X-energy’s reactors use carbon-coated uranium pebbles and helium gas to generate electricity, differing from traditional nuclear designs. The funding round included prominent investors such as Jane Street and Point72, highlighting growing interest in nuclear energy. This milestone positions X-energy as a key player in the U.S. SMR race, though challenges remain in commercializing the technology.

Key facts

  • X-energy raised $700 million in Series D funding, boosting its total raised to $1.8 billion.
  • The investment will expand supply chain capabilities for small modular reactors (SMRs) with 144 units ordered by Amazon, Dow, and Centrica.
  • Reactors use carbon-coated uranium pebbles and helium gas to generate 80 megawatts of power.
  • Notable investors include Jane Street, Ares Management, and ARK Invest, signaling strong industry confidence.
  • X-energy faces competition from other SMR startups, with limited existing U.S. nuclear plant construction.
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