About X Energy
X Energy is a company based in Greenbelt (United States) founded in 2010 by Kam Ghaffarian. X Energy has raised $1.53 billion across 13 funding rounds from investors including Ares Management, Gov.uk and University of Michigan. The company has 246 employees as of December 31, 2022. X Energy offers products and services including Xe-100, Xe-Mobile, and TRISO-X. X Energy operates in a competitive market with competitors including BWX Technologies, Helicity Space, Jimmy, Pulsar Fusion and Space Nuclear Power Corporation, among others.
- Headquarter Greenbelt, United States
- Employees 246 as on 31 Dec, 2022
- Founders Kam Ghaffarian
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Sectors
Aerospace, Defense & MaritimeEnergy & Utilities
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Phone
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Website
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Social
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- Legal Name X Energy, Llc
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Annual Revenue
Not available
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Net Profit
Not available
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EBITDA
Not available
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Total Equity Funding
$1.53 B (USD)
in 13 rounds
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Latest Funding Round
$700 M (USD), Series D
Nov 24, 2025
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Investors
Ares Management
& 21 more
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Employee Count
246
as on Dec 31, 2022
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Products & Services of X Energy
X Energy offers a comprehensive portfolio of products and services, including Xe-100, Xe-Mobile, and TRISO-X.
Advanced reactor with passive safety for clean energy production.
Portable reactor for flexible energy applications.
High-temperature fuel for extreme condition reactors.
People of X Energy
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Software Development Team
29 people
Leadership Team
20 people
Creative and Marketing Team
8 people
Project Team
6 people
Senior Team
5 people
Data Analysis and Operations Team
4 people
Legal and Compliance
4 people
Finance and Accounting
4 people
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Funding Insights of X Energy
X Energy has successfully raised a total of $1.53B across 13 strategic funding rounds. The most recent funding activity was a Series D round of $700 million completed in November 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
Investors in X Energy
X Energy has secured backing from 22 investors, including venture fund, institutional, and angel investors. Prominent investors backing the company include Ares Management, Gov.uk and University of Michigan.
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Investment opportunities in emerging industries are focused on by Sporos.
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Alternative asset investment management firm
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A global initiative focused on net-zero carbon emissions by 2040 through company commitments.
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Investor details for X Energy
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Investments & Acquisitions by X Energy
Investment portfolio details for X Energy
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Financial Statements - X Energy
Detailed financials for X Energy
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X Energy Comparisons
Peer comparison for X Energy
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Competitors of X Energy
X Energy operates in a dynamic and competitive business environment, facing competition from various established players and emerging companies in the market. The competitive landscape includes prominent companies such as BWX Technologies, Helicity Space, Jimmy, Pulsar Fusion and Space Nuclear Power Corporation, among others.
| Company Name | Domain | Founded year | HQ Location | Description |
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Nuclear energy technology solutions are developed and provided globally.
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Reusable rocket engines powered by nuclear fusion are manufactured.
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Batteries are manufactured by Jimmy in France since 2021.
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Plasma-propelled nuclear fusion energy systems are developed and provided.
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Provides nuclear reactors for space missions, surface power, and energy needs in harsh environments.
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Detailed competitors of X Energy
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Latest news on X Energy
Complete news archive for X Energy
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Frequently Asked Questions about X Energy
X Energy was founded in 2010 and raised its 1st funding round 6 years after it was founded.
X Energy is headquartered in Greenbelt, United States. It is registered at Greenbelt, Maryland, United States.
J. Clay Sell is the current CEO of X Energy.
X Energy is a funded company, having raised a total of $1.53B across 13 funding rounds to date.
As of Dec 31, 2022, the latest employee count at X Energy is 246.
X Energy was founded in 2010 and is based in Greenbelt, United States. Operations focus on the nuclear energy sector, where small modular reactors and high-temperature gas-cooled designs are developed using tri-structural isotropic particle fuel. Pebble bed reactors are also offered, alongside services in zero-emission energy production, neutronics analysis, and nuclear engineering. Activities support advancements in clean power generation.
X Energy's top competitors include BWX Technologies, Helicity Space and Pulsar Fusion.
X Energy offers Xe-100, Xe-Mobile, and TRISO-X.
X Energy has 22 investors. Key investors include Ares Management, Gov.uk, University of Michigan, DOE, and Jane Street.