United States · 
Who invested in X-energy?
X-energy's investors include Amazon.
20252026
$500MSeries C$1.0BRound
United States · Funded startup
Who invested in X-energy
2 rounds we have observed, with the one investor named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Raised 6 months ago
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Funding summaryUpdated 5 Nov 2026
$1.5Braised across 2 rounds since 2024, from 2 sources
$500MSeries C$1.0BRound
- Latest round
- Round, $1.0BMay 2026
- Step-upi
- 2×
- Investors
- 1 (1 led)
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series C, $500M Oct 2024
- Biggest round
- $1.0B Round · May 2026
- Between rounds
- 19 months from the last two
The rounds
- May 2026
- Oct 2024
Founders and team
From X-energy's own website: 1 founder, 19 on the team.
Dr. Kam GhaffarianFounder & Chairman
- Matt WelshVice President & Chief Information Officer
- J. Clay SellChief Executive Officer
- Alistair BlackVice President, UK
- Bobby DeanVice President, Growth & Strategy
- Dinkar S. BhatiaExecutive Vice President
- Dragan PopovicExecutive Vice President
- Graham CableVice President, Strategic Marketing & Customer Relationship Management
- Michael GigliottiVice President, Business Operations
- Randy EubanksVice President, Operations & Assurance
- Robert TaylorVice President, Regulatory Affairs and Licensing
- Sam LevenbackSenior Vice President
- Sean MiersVice President, Project Engineering
- Steve MillerExecutive Vice President
- Daniel GrossChief Financial Officer
- David BannisterChief Nuclear Officer
- David RoyerCo-General Counsel & Chief Compliance Officer
- Jesse B. WalkerChief Supply Chain Officer
- Rachel Lappin ScheinmanChief Human Capital Officer
And 1 more on the team.
Also claim to have backed them
These 6 firms list X-energy as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about X-energy
How much has X-energy raised?
X-energy has raised $1.5B across 2 rounds since 2024.
When did X-energy last raise?
X-energy's most recent round was an Undisclosed round of $1.0B in May 2026.
What was X-energy's biggest round?
Its most recent round, $1.0B in May 2026, is also its largest on record.
Who backed X-energy first?
X-energy's first round on record, in Oct 2024, was backed by Amazon.
What stage is X-energy at?
X-energy's latest named round is an Undisclosed round, in May 2026.
Where is X-energy based?
X-energy is based in the United States.
Who led X-energy's rounds?
Amazon led the Series C in 2024.
Companies like X-energy
In the same sector, and raised in the last eighteen months.
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