v3.26.1
Document And Entity Information
Jun. 04, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 04, 2026
Entity Registrant Name X-Energy, Inc.
Entity Central Index Key 0002088896
Entity Emerging Growth Company true
Entity File Number 001-43246
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 41-3934505
Entity Address, Address Line One 530 Gaither Road
Entity Address, Address Line Two Suite 700
Entity Address, City or Town Rockville
Entity Address, State or Province MD
Entity Address, Postal Zip Code 20850
City Area Code 310
Local Phone Number 358-5600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Title of 12(b) Security Class A common stock, par value $0.0001 per share
Trading Symbol XE
Security Exchange Name NASDAQ