X-Energy
IPOAdvanced Nuclear Reactor & Fuel Design Engineering
Rockville, United States · Founded 2009 · $1.9B raised
- Headquarters
- Rockville, Maryland
- Employees
- 501–1000
- Founded
- 2009
- Business Model
- B2B
- Website
- x-energy.com
- Total Funding
- $1.9B
- Last Round
- $700.0M Series DNov 2025
- Rounds
- 3
About
X-energy is pioneering advanced nuclear energy solutions with Generation IV high-temperature gas-cooled small modular reactors (SMRs) and TRISO-X fuel. Their safer, meltdown-proof technology enables clean, reliable power for decarbonization and energy abundance.
Summary
X-Energy is a Clean Energy company based in Rockville, United States, founded in 2009. It has raised $1.9B in total across 3 rounds, most recently a $700.0M Series D round in Nov 2025. Investors include Jane Street, Amazon and Ares Management.
Tech & App Stack
9 technologies & apps tracked
Create a free account — 10 credits a month to unlock the full tech & app stack, funding history, and valuations.
Sign up to view the funding chart
Create a free account — you'll get 10 credits a month to unlock funding history, valuations, and tech stacks.
Funding History
Apr 2026
Sign up to see all 4 rounds
Full funding history, per-round amounts, and investor participation.
Investors
Jane Street
2 rounds
Amazon
1 round
Ares Management
2 rounds
Emerson Collective
2 rounds
ARK Invest
1 round
Galvanize
1 round
Hood River Capital Management
1 round
Point72 Ventures
1 round
Reaves Asset Management
1 round
XTX Ventures
1 round
Corner Capital
1 round
Segra Capital Management
1 round
Amazon Climate Pledge Fund
1 round
Similar Companies
Clean energy startup developing portable nuclear microreactors as zero-emission alternatives to d...
Manufacturer of TRISO nuclear fuel for advanced reactors, supplying utilities and reactor develop...
Pioneering sustainable urban community and innovation hub in Abu Dhabi.
Northvolt is a European battery manufacturer on a mission to deliver sustainable lithium-ion batt...
MIT spinout developing compact fusion energy plants using high-temperature superconducting magnet...
AI infrastructure company building renewable-powered data centers and cloud compute optimized for...