The 12 closest competitors and alternatives to X-Energy, Inc. among energy companies — ranked by similarity to what X-Energy, Inc. actually does, not by market-cap band.
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X-Energy, Inc. operates within the energy sector, primarily focusing its efforts on the development of modular nuclear reactors and cutting-edge fuel technology to enable clean energy production. This company was established in 2009 by co-founders Kam Ghaffarian and Eben Mulder, and its main corporate offices are situated in Rockville, Maryland.
X-Energy, Inc. is an energy company headquartered in Rockville, United States. It is publicly listed (XE) with a market capitalisation of $300.9M. Xcout tracks 50 named people at X-Energy, Inc., including J. Clay Sell (CEO & Director). Xcout recorded 208 job postings from X-Energy, Inc. in the last 90 days, naming tools such as SAP, Amazon Bedrock, GitLab.
44 more named people on record for X-Energy, Inc., with roles, board committees and tenure — see the full roster →
Every round on record:
| Date | Round | Amount | Investors |
|---|---|---|---|
| Series D | $700M | 14 named | |
| Series D | $235M | 12 named |
Some filings are not shown as funding rounds.
Who invested in each round, lead investors, valuations and the co-investor graph — open the full funding history →
Xcout recorded 208 job postings from X-Energy, Inc. in the last 90 days, from a hiring record Xcout has kept since June 2026.
The weekly hiring trend, the roles and locations behind it — see X-Energy, Inc.'s hiring signals →
11 corporate events on record, with sources — see the full timeline →
Ranked by semantic similarity — how close each company is to X-Energy, Inc. by what it does, using Xcout's live company graph. Click any company for its full profile, or its competitor set.
Similar energy company
Eagle Nuclear Energy Corp. functions as an exploration and extraction enterprise, primarily dedicated to identifying and developing mineral resources across North America. This organization holds a distinctive position within the nuclear energy sector, integrating localized uranium prospecting with its proprietary Small Modular Reactor (SMR) technology. Furthermore, it engineers compact, modular nuclear reactors specifically designed to supply electricity for industrial operations and national power grids. Established in 2023, the company maintains its corporate headquarters in Reno, Nevada.
Similar energy company
Standard Nuclear, Inc. is a reactor-agnostic producer of TRISO nuclear fuel, designing and manufacturing advanced nuclear fuels for next-generation reactors to support U.S. energy security. The company is the only independent U.S. manufacturer of TRISO fuel, a robust, high-performance fuel essential to advanced nuclear reactors. It aims to supply advanced fuels to the next-generation nuclear industry and deliver radioisotope power solutions.
Similar energy company
NANO Nuclear Energy Inc. operates as a nuclear energy company. The company is developing KRONOS MMR Energy System, a high-temperature gas-cooled reactor; LOKI MMR, a compact microreactor designed for remote and specialized applications; ZEUS, a solid core battery reactor; and ODIN, a low-pressure salt coolant reactor. It is also developing a high-assay low-enriched uranium fuel processing facility to provide a fuel pipeline for the nuclear reactor industry, and fuel transportation and nuclear consultation businesses. The company was incorporated in 2022 and is based in New York, New York.
Similar energy company
Valar Atomics is an advanced nuclear systems company developing fuel fabrication and pilot plants, such as its facility in Orangeville, Utah. The company utilizes advanced nuclear systems to power the future and coordinates its operations through its headquarters in Los Angeles.
Nuclear Energy Technology
Lightbridge Corporation, alongside its affiliated entities, specializes in the innovation and advancement of nuclear fuel technology, marketed under the "Lightbridge Fuel" brand. The company's core mission involves the creation and commercialization of advanced metallic nuclear fuels. These fuels are engineered to improve the durability and safety of nuclear energy generation in both current and future reactor designs, ultimately aiming to make a significant contribution to combating climate change and reducing atmospheric pollutants. Established initially as Thorium Power, Ltd., the organization rebranded as Lightbridge Corporation in September 2009. The company's headquarters are situated in Reston, Virginia.
Similar energy company
Blue Energy Global Inc. designs and delivers factory-built nuclear power plants using a modular assembly approach to reduce construction time and costs. The company serves energy markets, including data centers and industrial power needs, by providing deployable and financeable clean energy infrastructure.
Similar energy company
Blykalla AB is a clean energy company founded in 2013 as a spin-off from the Royal Institute of Technology in Stockholm. The company develops and builds advanced small modular nuclear reactors designed to deliver the next generation of clean energy.
Similar energy company
ZettaJoule is an advanced small modular reactor company developing on-site nuclear reactors designed to provide clean heat, electricity, and hydrogen for energy-intensive industries. Operating in the United States and Japan, the company aims to deliver reliable, zero-carbon energy solutions operating at temperatures up to 950°C.
Similar energy company
Kairos Power LLC is an American nuclear energy company founded in 2016 that is developing fluoride salt-cooled high-temperature reactors (FHRs), a type of molten-salt reactor, in a small modular reactor (SMR) form factor.
Similar energy company
Radiant Industries is a pioneering company based in El Segundo, California, focused on developing mass-produced portable nuclear generators. The company works on innovative nuclear energy solutions to meet various power generation needs.
Similar energy company
Xcimer Energy Corporation is a laser fusion energy company developing advanced technology for clean energy production and defense applications. Headquartered in Denver, Colorado, the company works on scaling laser-driven inertial confinement fusion.
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