# X Energy

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/x-energy

- Industry: Power & Utilities
- Headquarters: Rockville, US
- Website: www.x-energy.com
- Total disclosed funding: $1.4B
- Latest round: Series D (Nov 24, 2025)
- Investors on record: 14

## About

X Energy, LLC, based in the US, manufactures advanced nuclear reactor technologies and fuels, emphasizing innovative designs to promote safe and efficient energy solutions.Founded in 2009 and headquartered in Rockville, US, X Energy, LLC specializes in advanced nuclear reactors. In Q1 2026, X Energy, LLC raised USD 5.2 million in venture funding from Stack Capital Group. Additionally, the company produces TRISO-X fuel, capable of enduring extreme temperatures beyond conventional nuclear fuels. Key users include industrial sectors, government agencies focused on emissions reduction, and space exploration, with a market presence in North America and select international locations.X Energy generates revenue through sales and licensing of its reactor and fuel technologies, primarily engaging in B2B transactions with government agencies, energy providers, and industrial clients. Its business model involves long-term contracts for reactor deployment, including initial sales, maintenance agreements, and ongoing fuel supply contracts. The transaction structure relies on partnerships within the energy sector, ensuring a consistent supply of TRISO-X fuel alongside the reactors, with specific pricing plans being proprietary.X Energy plans to leverage recent funding to expand its product line and market reach. The company is designing new products aimed at enhancing reactor efficiency and safety, with expected launches in the next few years. Geographic expansion is also a priority, targeting markets in Europe and Asia by 2025. The recent investment from Vincere Capital will support these initiatives by providing necessary financial resources for R&D and market entry strategies.

## Funding rounds

- Series D, Nov 24, 2025, $700M — NGP, Segra Capital Management, Point72 Asset Management, Hood River Capital Management, XTX Ventures, Jane Street Capital, Ark Invest, Ares Management, Reaves Asset Management, Galvanize Climate Solutions, Emerson Collective, Corner Capital
- Series C, Feb 6, 2025, $200M — Ares Management, Segra Capital Management, Jane Street Capital, Emerson Collective
- Series C, Oct 16, 2024, $500M — Ares Management, University of Michigan Endowment, NGP, Amazon

## Investors

- Ares Management (https://capitalatlas.ai/funds/ares-management) — Series C, Series D
- University of Michigan Endowment — Series C
- NGP (https://capitalatlas.ai/funds/ngp) — Series C, Series D
- Amazon (https://capitalatlas.ai/funds/amazon) — Series C
- Segra Capital Management (https://capitalatlas.ai/funds/segra-capital-management) — Series C, Series D
- Jane Street Capital — Series C, Series D
- Emerson Collective — Series C, Series D
- Point72 Asset Management — Series D
- Hood River Capital Management (https://capitalatlas.ai/funds/hood-river-capital-management) — Series D
- XTX Ventures (https://capitalatlas.ai/funds/xtx-ventures) — Series D
- Ark Invest (https://capitalatlas.ai/funds/ark-invest) — Series D
- Reaves Asset Management — Series D
- Galvanize Climate Solutions (https://capitalatlas.ai/funds/galvanize-climate-solutions) — Series D
- Corner Capital — Series D