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The Entrepreneur Story
CAPITAL·1 min read·May 23, 2026

X-energy Raises $1B, Targets IPO Amid AI Data Center Demand

Nuclear startup X-energy secured $1 billion in pre-IPO funding, led by Ares Management, to commercialize its advanced SMRs and meet the surging 24/7 energy demands of AI data centers.

Close-up view of nuclear reactor buildings bathed in golden light, showcasing industrial architecture.
Close-up view of nuclear reactor buildings bathed in golden light, showcasing industrial architecture. · Plate 01 · Photographed for The Entrepreneur Story

Nuclear Startup X-energy Raises $1B, Targets IPO Amid Data Center Demand

X-energy, a nuclear energy startup, raised $1 billion in a pre-IPO funding round. Ares Management led the round. The company develops advanced small modular reactors (SMRs) and aims for a traditional Initial Public Offering (IPO). This capital will finance its IPO path and accelerate SMR technology commercialization. Surging energy demand from AI data centers drives X-energy's strategy.

Quick takeaways

  • Strategic Pre-IPO Capital: X-energy raised $1 billion in a pre-IPO funding round. Ares Management led the round. The company aims for a traditional IPO, having withdrawn plans for a SPAC merger.
  • AI-Driven Energy Demand: X-energy's SMRs address the continuous, high-power needs of AI data centers. CEO Clay Sell stated intermittent renewables cannot provide this 24/7 power.
  • Technology Differentiation: X-energy develops Xe-100 SMRs. Each Xe-100 generates 80 MWe. The reactors use TRISO-X fuel, engineered to be meltdown-proof.
  • Government Backing: X-energy received a $1.2 billion award from the U.S. Department of Energy (DOE) for its Advanced Reactor Demonstration Program (ARDP).

The Billion-Dollar Bet on Nuclear Power

X-energy, a developer of advanced small modular reactors (SMRs), raised $1 billion in

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No. The desk answers

Reader questions.

About X-energy Raises $1B, Targets IPO Amid AI Data Center Demand — five of the most-asked, in the desk's own words.

  1. 01What is X-energy and what technology do they develop?
    X-energy is a nuclear energy startup that develops advanced small modular reactors (SMRs). Specifically, they focus on the Xe-100 SMRs, which generate 80 MWe each and use meltdown-proof TRISO-X fuel.
  2. 02How much capital did X-energy raise and who led the round?
    X-energy raised $1 billion in a pre-IPO funding round. The investment was led by Ares Management. This capital is intended to finance their path to an Initial Public Offering and accelerate the commercialization of their SMR technology.
  3. 03What market demand is driving X-energy's strategy?
    X-energy's strategy is primarily driven by the surging energy demand from AI data centers. These data centers require continuous, high-power electricity 24/7, which CEO Clay Sell states intermittent renewables cannot reliably provide.
  4. 04What are X-energy's plans regarding an IPO?
    X-energy aims for a traditional Initial Public Offering (IPO). The company had previously withdrawn plans for a SPAC merger and is now pursuing a direct IPO path, using the recent $1 billion funding to support this goal.
  5. 05Does X-energy have government support for its technology?
    Yes, X-energy has significant government backing. They received a $1.2 billion award from the U.S. Department of Energy (DOE) as part of its Advanced Reactor Demonstration Program (ARDP), demonstrating federal confidence in their SMR technology.

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X-energy Raises $1B, Targets IPO Amid AI Data Center Demand — The Entrepreneur Story