Company lists · Data refreshed September 2026
Top 25 Nuclear research and development companies worldwide
RevenueBase identified 387 nuclear research and development companies worldwide as of September 2026 and tracks 127,670 professional contacts across them, including 38,719 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.
This list covers nuclear research and development companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 15, 2026. Country and city lists for nuclear research and development companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest nuclear research and development companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 15,685 contacts → | ||||
Indirect evidence “The CEA is the French Alternative Energies and Atomic Energy Commission ("Commissariat à l'énergie atomique et aux énergies alternatives").” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 2 | 12,439 contacts → | ||||
Partial evidence “Framatome is an international leader in nuclear energy recognized for its innovative, digital and value added solutions for the global nuclear fleet.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 3 | 11,121 contacts → | ||||
Indirect evidence “Opérateur international reconnu dans le domaine des matières nucléaires, Orano apporte des solutions aux défis actuels et futurs, dans l’énergie et la santé.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 4 | 10,898 contacts → | ||||
Partial evidence “Westinghouse Electric Company is the world's leading supplier of safe and innovative nuclear technology.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 5 | 6,518 contacts → | ||||
Partial evidence “Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 6 | 5,574 contacts → | ||||
Indirect evidence “Every day, the people of Battelle apply science and technology to solving what matters most.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 7 | 4,531 contacts → | ||||
Indirect evidence “The freedom to explore.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 8 | 3,832 contacts → | ||||
Indirect evidence “At BWX Technologies, Inc.(NYSE: BWXT), we are People Strong, Innovation Driven.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 9 | 2,270 contacts → | ||||
Partial evidence “Cameco is a global nuclear energy company.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 10 | 2,229 contacts → | ||||
Partial evidence “Canada's premier nuclear science and technology organization.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,775 contacts → | ||||
Partial evidence “Our purpose is to protect the UK through nuclear science and technology, and our mission is to design and manufacture warheads and provide nuclear services to meet the needs of…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,664 contacts → | ||||
Partial evidence “Onet Technologies has 40 years of experience in the nuclear industry, with a strong expertise in engineering and services for reactor maintenance; dismantling, decommissioning and…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,592 contacts → | ||||
Partial evidence “Cavendish Nuclear is a core part of Babcock International Group’s Nuclear Sector.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,315 contacts → | ||||
Indirect evidence “TechnicAtome est spécialisée, depuis plus de 50 ans, dans la conception, la réalisation, la mise en service et le maintien en conditions opérationnelles des réacteurs nucléaires…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,254 contacts → | ||||
Partial evidence “EnergySolutions is an international nuclear services company headquartered in Salt Lake City, Utah, and Charlotte, North Carolina, with operations across the United States and…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 16 | 1,055 contacts → | ||||
Partial evidence “X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1,023 contacts → | ||||
Indirect evidence “Commonwealth Fusion Systems (CFS) is on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,010 contacts → | ||||
Indirect evidence “Our Canadian-made, CANDU® reactors supply approximately 50% of Ontario’s electricity and 16% of Canada’s overall electricity requirements.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 19 | 925 contacts → | ||||
Partial evidence “Atomic Energy of Canada Limited (AECL) is a federal Crown corporation with a mandate to enable nuclear science and technology and to protect the environment by fulfilling the…” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 20 | 913 contacts → | ||||
Partial evidence “TerraPower is a leading nuclear innovation company that strives to improve the world through nuclear energy and science.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 21 | 830 contacts → | ||||
Partial evidence “As the UK’s lead civil national laboratory for nuclear fission, we work closely with Government to drive forward the nation’s nuclear ambitions.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 22 | 684 contacts → | ||||
Partial evidence “Centrus Energy is a trusted American supplier of nuclear fuel and services for the nuclear power industry, helping meet the growing need for clean, affordable, carbon-free energy.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 23 | 640 contacts → | ||||
Partial evidence “Since launching in 2021 newcleo has quickly established itself as innovator in the field of nuclear energy.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 24 | 579 contacts → | ||||
Indirect evidence “KEPCO E&C was founded in 1975 with the objective of obtaining core technology.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 25 | 558 contacts → | ||||
Indirect evidence “We are now Orano!” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: nuclear research and development companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names nuclear research and development companies.
- Partial evidence
- Its own public description names part of nuclear research and development companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name nuclear research and development companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 387 nuclear research and development companies worldwide
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Nuclear research and development companies worldwide at a glance
As of Sep 15, 2026Companies by employee count
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among nuclear research and development companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- 4 countries, largest first: the United States, the United Kingdom, France, Canada. Country and city lists for nuclear research and development companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “nuclear research and development companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names nuclear research and development companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among nuclear research and development companies, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 38,719 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 15, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Nuclear research and development companies by location
4 lists · largest firstEvery Nuclear research and development companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names nuclear research and development companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many nuclear research and development companies are there worldwide?
RevenueBase identified 387 nuclear research and development companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
CEA, headquartered in Paris, tops this list with the largest team on record.
Which country has the most nuclear research and development companies?
The United States leads with 244 companies, followed by the United Kingdom (64) and France (46). Every nuclear research and development companies list by country and city is linked on this page.
Which city has the most nuclear research and development companies?
London leads with 13 headquartered companies, followed by Toronto (9) and New York (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 38,719 verified decision-maker contacts tracked across these 387 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 15, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
Company intelligence · public preview
Top 25 nuclear research and development companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 387 matching company records for nuclear research and development companies worldwide, with 127,670 tracked contacts and 38,719 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 15, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 nuclear research and development companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | CEAcea.fr HQ: Paris, FranceReported employees: 10001+ | Paris, France | 10001+ | Exact match | 15,685 contacts → |
“The CEA is the French Alternative Energies and Atomic Energy Commission ("Commissariat à l'énergie atomique et aux énergies alternatives").” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Framatomeframatome.comHQ: Courbevoie, FranceReported employees: 10001+ | Courbevoie, France | 10001+ | Exact match | 12,439 contacts → |
“Framatome is an international leader in nuclear energy recognized for its innovative, digital and value added solutions for the global nuclear fleet.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  ORANOorano.groupHQ: Châtillon, FranceReported employees: 10001+ | Châtillon, France | 10001+ | Exact match | 11,121 contacts → |
“Opérateur international reconnu dans le domaine des matières nucléaires, Orano apporte des solutions aux défis actuels et futurs, dans l’énergie et la santé.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Westinghouse Electric Companywestinghousenuclear.comHQ: Cranberry Township, PA, United StatesReported employees: 5,001-10,000 | Cranberry Township, PA, United States | 5,001-10,000 | Exact match | 10,898 contacts → |
“Westinghouse Electric Company is the world's leading supplier of safe and innovative nuclear technology.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Assystemassystem.comHQ: Courbevoie, FranceReported employees: 5,001-10,000 | Courbevoie, France | 5,001-10,000 | Exact match | 6,518 contacts → |
“Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Battellebattelle.orgHQ: Columbus, OH, United StatesReported employees: 10001+ | Columbus, OH, United States | 10001+ | Exact match | 5,574 contacts → |
“Every day, the people of Battelle apply science and technology to solving what matters most.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  General Atomicsga.comHQ: San Diego, CA, United StatesReported employees: 10001+ | San Diego, CA, United States | 10001+ | Exact match | 4,531 contacts → |
“The freedom to explore.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  BWXTbwxt.comHQ: Lynchburg, VA, United StatesReported employees: 5,001-10,000 | Lynchburg, VA, United States | 5,001-10,000 | Exact match | 3,832 contacts → |
“At BWX Technologies, Inc.(NYSE: BWXT), we are People Strong, Innovation Driven.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Cameco Corporationcameco.com HQ: Saskatoon, SK, CanadaReported employees: 1,001-5,000 | Saskatoon, SK, Canada | 1,001-5,000 | Exact match | 2,270 contacts → |
“Cameco is a global nuclear energy company.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | HQ: Chalk River, ON, CanadaReported employees: 1,001-5,000 | Chalk River, ON, Canada | 1,001-5,000 | Exact match | 2,229 contacts → |
“Canada's premier nuclear science and technology organization.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  AWEawe.co.ukHQ: Reading, United KingdomReported employees: 5,001-10,000 | Reading, United Kingdom | 5,001-10,000 | Exact match | 1,775 contacts → |
“Our purpose is to protect the UK through nuclear science and technology, and our mission is to design and manufacture warheads and provide nuclear services to meet the needs of…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Onet Technologiesonet.frHQ: Marseille, FranceReported employees: 1,001-5,000 | Marseille, France | 1,001-5,000 | Exact match | 1,664 contacts → |
“Onet Technologies has 40 years of experience in the nuclear industry, with a strong expertise in engineering and services for reactor maintenance; dismantling, decommissioning and…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Cavendish Nuclearcavendishnuclear.comHQ: Birchwood, United KingdomReported employees: 5,001-10,000 | Birchwood, United Kingdom | 5,001-10,000 | Exact match | 1,592 contacts → |
“Cavendish Nuclear is a core part of Babcock International Group’s Nuclear Sector.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Technicatometechnicatome.comHQ: Villiers-le-bâcle, FranceReported employees: 1,001-5,000 | Villiers-le-bâcle, France | 1,001-5,000 | Exact match | 1,315 contacts → |
“TechnicAtome est spécialisée, depuis plus de 50 ans, dans la conception, la réalisation, la mise en service et le maintien en conditions opérationnelles des réacteurs nucléaires…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Energysolutionsenergysolutions.comHQ: Salt Lake City, UT, United StatesReported employees: 1,001-5,000 | Salt Lake City, UT, United States | 1,001-5,000 | Exact match | 1,254 contacts → |
“EnergySolutions is an international nuclear services company headquartered in Salt Lake City, Utah, and Charlotte, North Carolina, with operations across the United States and…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  X-Energyx-energy.comHQ: Rockville, MD, United StatesReported employees: 501-1,000 | Rockville, MD, United States | 501-1,000 | Exact match | 1,055 contacts → |
“X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Commonwealth Fusion Systemscfs.energy HQ: Devens, MA, United StatesReported employees: 501-1,000 | Devens, MA, United States | 501-1,000 | Exact match | 1,023 contacts → |
“Commonwealth Fusion Systems (CFS) is on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Candu Energy INCatkinsrealis.comHQ: Mississauga, ON, CanadaReported employees: 1,001-5,000 | Mississauga, ON, Canada | 1,001-5,000 | Exact match | 1,010 contacts → |
“Our Canadian-made, CANDU® reactors supply approximately 50% of Ontario’s electricity and 16% of Canada’s overall electricity requirements.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  AECLaecl.caHQ: Chalk River, ON, CanadaReported employees: Not recorded | Chalk River, ON, Canada | Not recorded | Exact match | 925 contacts → |
“Atomic Energy of Canada Limited (AECL) is a federal Crown corporation with a mandate to enable nuclear science and technology and to protect the environment by fulfilling the…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Terrapowerterrapower.comHQ: Bellevue, WA, United StatesReported employees: 501-1,000 | Bellevue, WA, United States | 501-1,000 | Exact match | 913 contacts → |
“TerraPower is a leading nuclear innovation company that strives to improve the world through nuclear energy and science.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Warrington, United KingdomReported employees: 1,001-5,000 | Warrington, United Kingdom | 1,001-5,000 | Exact match | 830 contacts → |
“As the UK’s lead civil national laboratory for nuclear fission, we work closely with Government to drive forward the nation’s nuclear ambitions.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Centrus Energy Corpcentrusenergy.comHQ: Bethesda, MD, United StatesReported employees: 201-500 | Bethesda, MD, United States | 201-500 | Exact match | 684 contacts → |
“Centrus Energy is a trusted American supplier of nuclear fuel and services for the nuclear power industry, helping meet the growing need for clean, affordable, carbon-free energy.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Newcleonewcleo.comHQ: Paris, ItalyReported employees: 501-1,000 | Paris, Italy | 501-1,000 | Exact match | 640 contacts → |
“Since launching in 2021 newcleo has quickly established itself as innovator in the field of nuclear energy.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Kepco E&ckepco-enc.comHQ: Port Elgin, CanadaReported employees: 1,001-5,000 | Port Elgin, Canada | 1,001-5,000 | Exact match | 579 contacts → |
“KEPCO E&C was founded in 1975 with the objective of obtaining core technology.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  AREVAareva.comHQ: Paris La Defense, FranceReported employees: 10001+ | Paris La Defense, France | 10001+ | Exact match | 558 contacts → |
“We are now Orano!” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 387 company matches
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Nuclear research and development companies: dataset insights
September 15, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
387 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 15, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Nuclear research and development companies by location
4 lists · largest firstEvery Nuclear research and development companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for nuclear research and development companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many nuclear research and development companies did RevenueBase find worldwide?
The saved snapshot records 387 matching company records, 127,670 tracked contacts and 38,719 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 15, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 nuclear research and development companies worldwide. Snapshot: September 15, 2026. https://revenuebase.ai/companies/browse/nuclear-research-and-development-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 nuclear research and development companies worldwide
RevenueBase records 387 matching company records for nuclear research and development companies worldwide, with 127,670 tracked contacts and 38,719 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 15, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 nuclear research and development companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | CEAcea.fr HQ: Paris, FranceReported employees: 10001+ | Paris, France | 10001+ | Exact match | 15,685 contacts → |
“The CEA is the French Alternative Energies and Atomic Energy Commission ("Commissariat à l'énergie atomique et aux énergies alternatives").” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Framatomeframatome.com HQ: Courbevoie, FranceReported employees: 10001+ | Courbevoie, France | 10001+ | Exact match | 12,439 contacts → |
“Framatome is an international leader in nuclear energy recognized for its innovative, digital and value added solutions for the global nuclear fleet.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | ORANOorano.group HQ: Châtillon, FranceReported employees: 10001+ | Châtillon, France | 10001+ | Exact match | 11,121 contacts → |
“Opérateur international reconnu dans le domaine des matières nucléaires, Orano apporte des solutions aux défis actuels et futurs, dans l’énergie et la santé.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Westinghouse Electric Companywestinghousenuclear.com HQ: Cranberry Township, PA, United StatesReported employees: 5,001-10,000 | Cranberry Township, PA, United States | 5,001-10,000 | Exact match | 10,898 contacts → |
“Westinghouse Electric Company is the world's leading supplier of safe and innovative nuclear technology.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Assystemassystem.com HQ: Courbevoie, FranceReported employees: 5,001-10,000 | Courbevoie, France | 5,001-10,000 | Exact match | 6,518 contacts → |
“Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Battellebattelle.org HQ: Columbus, OH, United StatesReported employees: 10001+ | Columbus, OH, United States | 10001+ | Exact match | 5,574 contacts → |
“Every day, the people of Battelle apply science and technology to solving what matters most.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | General Atomicsga.com HQ: San Diego, CA, United StatesReported employees: 10001+ | San Diego, CA, United States | 10001+ | Exact match | 4,531 contacts → |
“The freedom to explore.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | BWXTbwxt.com HQ: Lynchburg, VA, United StatesReported employees: 5,001-10,000 | Lynchburg, VA, United States | 5,001-10,000 | Exact match | 3,832 contacts → |
“At BWX Technologies, Inc.(NYSE: BWXT), we are People Strong, Innovation Driven.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Cameco Corporationcameco.com HQ: Saskatoon, SK, CanadaReported employees: 1,001-5,000 | Saskatoon, SK, Canada | 1,001-5,000 | Exact match | 2,270 contacts → |
“Cameco is a global nuclear energy company.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | HQ: Chalk River, ON, CanadaReported employees: 1,001-5,000 | Chalk River, ON, Canada | 1,001-5,000 | Exact match | 2,229 contacts → |
“Canada's premier nuclear science and technology organization.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | AWEawe.co.uk HQ: Reading, United KingdomReported employees: 5,001-10,000 | Reading, United Kingdom | 5,001-10,000 | Exact match | 1,775 contacts → |
“Our purpose is to protect the UK through nuclear science and technology, and our mission is to design and manufacture warheads and provide nuclear services to meet the needs of…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Onet Technologiesonet.fr HQ: Marseille, FranceReported employees: 1,001-5,000 | Marseille, France | 1,001-5,000 | Exact match | 1,664 contacts → |
“Onet Technologies has 40 years of experience in the nuclear industry, with a strong expertise in engineering and services for reactor maintenance; dismantling, decommissioning and…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Cavendish Nuclearcavendishnuclear.com HQ: Birchwood, United KingdomReported employees: 5,001-10,000 | Birchwood, United Kingdom | 5,001-10,000 | Exact match | 1,592 contacts → |
“Cavendish Nuclear is a core part of Babcock International Group’s Nuclear Sector.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Technicatometechnicatome.com HQ: Villiers-le-bâcle, FranceReported employees: 1,001-5,000 | Villiers-le-bâcle, France | 1,001-5,000 | Exact match | 1,315 contacts → |
“TechnicAtome est spécialisée, depuis plus de 50 ans, dans la conception, la réalisation, la mise en service et le maintien en conditions opérationnelles des réacteurs nucléaires…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Energysolutionsenergysolutions.com HQ: Salt Lake City, UT, United StatesReported employees: 1,001-5,000 | Salt Lake City, UT, United States | 1,001-5,000 | Exact match | 1,254 contacts → |
“EnergySolutions is an international nuclear services company headquartered in Salt Lake City, Utah, and Charlotte, North Carolina, with operations across the United States and…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | X-Energyx-energy.com HQ: Rockville, MD, United StatesReported employees: 501-1,000 | Rockville, MD, United States | 501-1,000 | Exact match | 1,055 contacts → |
“X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Commonwealth Fusion Systemscfs.energy HQ: Devens, MA, United StatesReported employees: 501-1,000 | Devens, MA, United States | 501-1,000 | Exact match | 1,023 contacts → |
“Commonwealth Fusion Systems (CFS) is on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Candu Energy INCatkinsrealis.com HQ: Mississauga, ON, CanadaReported employees: 1,001-5,000 | Mississauga, ON, Canada | 1,001-5,000 | Exact match | 1,010 contacts → |
“Our Canadian-made, CANDU® reactors supply approximately 50% of Ontario’s electricity and 16% of Canada’s overall electricity requirements.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | AECLaecl.ca HQ: Chalk River, ON, CanadaReported employees: Not recorded | Chalk River, ON, Canada | Not recorded | Exact match | 925 contacts → |
“Atomic Energy of Canada Limited (AECL) is a federal Crown corporation with a mandate to enable nuclear science and technology and to protect the environment by fulfilling the…” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Terrapowerterrapower.com HQ: Bellevue, WA, United StatesReported employees: 501-1,000 | Bellevue, WA, United States | 501-1,000 | Exact match | 913 contacts → |
“TerraPower is a leading nuclear innovation company that strives to improve the world through nuclear energy and science.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Warrington, United KingdomReported employees: 1,001-5,000 | Warrington, United Kingdom | 1,001-5,000 | Exact match | 830 contacts → |
“As the UK’s lead civil national laboratory for nuclear fission, we work closely with Government to drive forward the nation’s nuclear ambitions.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Centrus Energy Corpcentrusenergy.com HQ: Bethesda, MD, United StatesReported employees: 201-500 | Bethesda, MD, United States | 201-500 | Exact match | 684 contacts → |
“Centrus Energy is a trusted American supplier of nuclear fuel and services for the nuclear power industry, helping meet the growing need for clean, affordable, carbon-free energy.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Newcleonewcleo.com HQ: Paris, ItalyReported employees: 501-1,000 | Paris, Italy | 501-1,000 | Exact match | 640 contacts → |
“Since launching in 2021 newcleo has quickly established itself as innovator in the field of nuclear energy.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Kepco E&ckepco-enc.com HQ: Port Elgin, CanadaReported employees: 1,001-5,000 | Port Elgin, Canada | 1,001-5,000 | Exact match | 579 contacts → |
“KEPCO E&C was founded in 1975 with the objective of obtaining core technology.” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | AREVAareva.com HQ: Paris La Defense, FranceReported employees: 10001+ | Paris La Defense, France | 10001+ | Exact match | 558 contacts → |
“We are now Orano!” Recorded description excerpt · September 15, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 387 company matches
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Nuclear research and development companies: dataset insights
September 15, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
387 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 15, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Nuclear research and development companies by location
4 lists · largest firstEvery Nuclear research and development companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for nuclear research and development companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many nuclear research and development companies did RevenueBase find worldwide?
The saved snapshot records 387 matching company records, 127,670 tracked contacts and 38,719 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 15, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
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Cite this list
RevenueBase Data Team. Top 25 nuclear research and development companies worldwide. Snapshot: September 15, 2026. https://revenuebase.ai/companies/browse/nuclear-research-and-development-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗