Stack Capital invests $5-million (U.S.) into X-energy

Executive Summary

• Stack Capital Group Inc. has invested $5 million USD into X-energy Reactor Company LLC, a developer of advanced nuclear technology and small modular reactors (SMRs).
• The investment positions Stack Capital in the advanced nuclear sector, citing the critical need for reliable, carbon-free baseload power to support AI, electrification, and industrial decarbonization.
• X-energy is backed by significant private capital ($1.8 billion) and U.S. Department of Energy funding ($1.2 billion), with major stakeholders including Amazon, Dow Inc., and Ontario Power Generation.

Key Details

• Investment Amount: $5 million USD.
• Investor: Stack Capital Group Inc.
• Target Company: X-energy Reactor Company LLC.
• Target Technology:
  • Xe-100: Advanced small modular reactor (SMR).
  • Xenith: Factory-built microreactor for critical infrastructure, microgrids, and remote communities.
  • Triso-X: Proprietary particle fuel capable of withstanding very high temperatures without melting.
• X-energy Backing:
  • Approximately $1.8 billion in private capital.
  • Up to $1.2 billion in U.S. Department of Energy funding through the Advanced Reactor Demonstration Program.
• Key Stakeholders/Customers: Amazon, Dow Inc., Energy Northwest, Ontario Power Generation, and Centrica.
• Strategic Rationale: To address global economic growth constraints by providing carbon-free baseload power for the digital economy and climate objectives.

Notable Quotes

• "Reliable, carbon-free baseload power is becoming one of the most critical constraints on global economic growth, particularly as AI [artificial intelligence], electrification and industrial decarbonization accelerate," said Jimmy Vaiopoulos, chief financial officer of Stack Capital. "Advanced nuclear energy is uniquely positioned to meet this demand at scale, and X-Energy stands out as a category leader with differentiated technology, integrated fuel supply and real commercial traction. We believe X-Energy represents a foundational investment in the future energy infrastructure required to support both the digital economy and long-term climate objectives."