How many total Nuclear Energy companies are there?

As of Oct 2026, there are 917 active companies in Nuclear Energy sector.

Which countries have the most Nuclear Energy companies?

United States (306) has the highest number of Nuclear Energy companies, followed by United Kingdom (96) and Germany (44).

How many Nuclear Energy companies are funded?

As of Oct 2026, 317 companies in this sector have received funding.

Which company has raised the most funding in Nuclear Energy sector?

As of Oct 2026, CFS has secured $4B in funding, making it the highest-funded company in the Nuclear Energy sector.

Which country has attracted the most investment in Nuclear Energy companies?

With $22.8B in total funding, United States has attracted the most investment among Nuclear Energy companies.

Who are the top investors in Nuclear Energy companies?

The top investors in Nuclear Energy companies by number of investments are Europa, OSTI and DOE

How much venture capital has Nuclear Energy sector attracted?

In the last 10 years, venture capital firms have invested $13.5B in this sector.

How many unicorns has Nuclear Energy sector produced?

Globally, there are 6 unicorns in Nuclear Energy sector, to date.

Nuclear Energy - 2026 Market & Investments Trends

There are 960 companies in the Nuclear Energy sector across the world, with 317 funded companies having collectively raised $46.6B in venture capital money and private equity. Overall 178 of these are Series A+ funded and the sector has seen the creation of 6 Unicorns.

Nuclear Energy sector has seen 53 acquisitions and 56 IPOs. This represents almost 11.4% of all such companies - which is higher than the 4.0% exit rate of tech companies in general.

This sector includes companies involved in the generation of nuclear energy and providing technologies to enable nuclear energy-based electricity generation.

Nuclear Energy sector is also known as Nuclear Power.

Companies included in Nuclear Energy sector

All companies that develop or are researching to develop equipment and processes to generate power and heat using nuclear energy both in fission and fusion form. Also includes companies that are a part of the nuclear fuel cycle, including uranium enrichment of fuels.

Companies excluded in Nuclear Energy sector

Companies that are consultants for designing of power plants, Uranium mining companies and dedicated fuel storage companies. Also all Government entities have been kept outside the purview of the scope.

Key Metrics

Total Companies

960

Top Companies

NextEra Energy, Orano & more

Total Funding

Funded Companies

Series A+ Companies

Series C+ Companies

Unicorns Created

IPOs

Acquisitions

Also known as

Nuclear Power

View complete details of this sector

The market map of Nuclear Energy gives a visual overview of the sector, showing key business models, their interactions in the value chain, and industry evolution. Trending business model in Nuclear Energy sector is Nuclear Fusion.

Recent BlueBox/Industry Definition image of Nuclear Energy

Here are some reports related to Nuclear Energy sector:

Free

Nuclear Energy - Sector Report

Edition: September, 2026 (69 Pages)

Premium

Nuclear Energy Investor Landscape

Edition: January, 2025

Premium

Nuclear Energy Exit Landscape

Edition: August, 2026 (15 Pages)

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There are more than 960 companies in Nuclear Energy. NextEra Energy is the top Nuclear Energy company globally, ranked using Tracxn Score (what's this?).

Here are 5 of the top Nuclear Energy companies globally:

Company	Description	Location	Founded	Current Stage	Private Funding Raised
NextEra Energy	Developer of energy solutions	Juno Beach (United States)	1925	Public	-
Orano	Fuel and power producer in the nuclear energy sector	United States	2001	Public	$308M
Exelon	Provider of energy services with an electric and natural gas distribution	Chicago (United States)	2000	Public	-
Newcleo	Provider of advanced nuclear energy technologies, focused on designing, building, and operating small modular lead-cooled fast reactors	Paris (France)	2021	Public	$843M
General Fusion	Magnetized nuclear fusion reactor developer	Burnaby (Canada)	2002	Public	$515M

Get a longer list of companies

Companies founded year-on-year in the Nuclear Energy sector

33 new startups have been founded so far in 2026 in the Nuclear Energy sector. 46 Nuclear Energy startups were founded in 2021 - this is the most number of startups founded in any year in the last 10 years.

Total Number of Companies

Year	No. of companies
2026	33
2025	24
2024	23
2023	35
2022	26
2021	46
2020	26
2019	29
2018	21
2017	27

Companies founded across countries in the Nuclear Energy sector

United States has 306 Nuclear Energy startups, the most by any country, followed by United Kingdom which has 96 startups and Germany which has 44.

Total Number of Companies

Country	No. of companies
United States	306
United Kingdom	96
Germany	44
France	43
Canada	43
India	33
China	31
Japan	27
South Korea	14
Russia	14

Stage-wise distribution of the Nuclear Energy sector

Out of the total 960 Nuclear Energy companies, 317 have secured funding. Among them, 178 have reached Series A or higher, and 146 to Series B or beyond.

Founded - 960

Funded - 317

Series A+ - 178

Series B+ - 146

Series C+ - 132

Company Stage	No. of companies
Founded	960
Funded	317
Series A+	178
Series B+	146
Series C+	132

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955+ Total Companies
$46.6B+ Total Funding
315+ Funded Companies
55+ IPOs
50+ Acquisitions
5+ Reports

Total funding year-on-year in the Nuclear Energy sector

The Nuclear Energy sector saw a total funding of more than $32.3B in the last 10 years. The most amount of funding was in 2025 at more than $7.47B. There has been a total funding of $6.84B in 2026 till date.

Total Funding

Year	Total Funding
2026	$6.84B
2025	$7.47B
2024	$2.67B
2023	$1.04B
2022	$1.96B
2021	$4.9B
2020	$578M
2019	$4.81B
2018	$1.13B
2017	$894M

Total funding across countries in the Nuclear Energy sector

In the last 10 years, Nuclear Energy startups in United States have recieved the highest funding among all countries - $22.8B. Canada follows with $1.51B and Germany with $1.21B.

Total Funding

Country	Total Funding
United States	$22.8B
Canada	$1.51B
Germany	$1.21B
France	$1.08B
United Kingdom	$824M
China	$759M
Japan	$507M
Australia	$162M
Sweden	$97.7M
Belgium	$5.53M

Total funding amount raised by stage in the Nuclear Energy sector

Over the last 10 years, the Nuclear Energy sector have seen $1.05B into Seed Stage funding rounds, $9.17B into Early Stage funding rounds and $9.32B go into Late Stage funding rounds.

Funding Stage	Total Funding
Late Stage	$9.32B
Early Stage	$9.17B
Debt	$8.97B
Grant	$1.84B
Post IPO	$1.45B
Seed Stage	$1.05B
PE	$308M

Recent Funding Rounds in Nuclear Energy

In the year 2026, till September 2026, Nuclear Energy companies have raised $6.34B in equity funding across 58 rounds. In the same period last year (i.e. till September 2025), Nuclear Energy companies had raised $3.51B across 57 rounds. So, 2026 has seen a 80.69% rise in funding in Nuclear Energy companies as compared to 2025.

Here are some recent, important funding rounds in Nuclear Energy:

Company	Round Raised	Amount Raised	Funding Date	Investors
Kairos Power	Series C	6199	Sep 28, 2026	Samsung C&T
American Supercritical	Seed	7186	Sep 24, 2026	Silent Ventures and 7 more
StandardX	Seed	8835	Sep 23, 2026	VSquared Ventures and 5 more
Fluxnium	Seed	8940	Sep 16, 2026	Congruent Ventures and 2 more
Xcimer	Series A	8328	Sep 14, 2026	RTX

See a more detailed list of funding rounds

Europa is the top investor in Nuclear Energy companies based on number of companies invested.

Here are some top investors in Nuclear Energy:

Investor	Location	Top Portfolio Companies
Europa	Belgium	Orano, Fortum, China National Nuclear Corporation and Mirion
OSTI	Oak Ridge (United States)	Orano, Exelon, Oklo and CFS
DOE	Washington, DC (United States)	NuScale Power, Oklo, Realta Fusion and X Energy
Economy And Finance	France	Orano, Westinghouse Electric, Framatome and BERNARD CONTROLS
National Science Foundation	Arlington (United States)	SHINE Technologies, Avalanche, Molten Salt Solutions and NearStar Fusion

See a more detailed list of investors

In the year 2026, till June 2026, 5 acquisitions happened in Nuclear Energy sector. Last year, in 2025, a total of 5 acquisitions happened in Nuclear Energy sector.

Here are some recent, important acquisitions in Nuclear Energy:

Company	Acquisition Type	Acquisition Date	Acquirers
Platom	Business Acquisition	Jun 02, 2026	Sweco
STS	Business Acquisition	May 26, 2026	Nano Nuclear
Steag	Business Acquisition	Mar 20, 2026	Bluspring
Kärnfull Next	Business Acquisition	Mar 09, 2026	Studsvik
Royal Uranium	Business Acquisition	Feb 18, 2026	Fusion Fuel

See a more detailed list of acquisitions

Acquisition trends in Nuclear Energy

Here are the acquisition trends in Nuclear Energy:

Total Number of Acquisitions

Year	No. of companies
2026	5
2025	5
2024	7
2023	6
2022	8
2021	4
2020	4
2019	-
2018	2
2017	8

In the year 2026, till September 2026, 7 IPOs happened in Nuclear Energy sector.

Here are some recent, important IPOs in Nuclear Energy:

Company	IPO Date	Exchange Symbol
Newcleo	Sep 22, 2026	National Association of Securities Dealers Automated Quotations (NASDAQ)
B-Able	Jul 29, 2026	Tokyo Stock Exchange (TYO)
Standardnuclear	Jul 16, 2026	New York Stock Exchange (NYSE)
General Fusion	Jul 13, 2026	National Association of Securities Dealers Automated Quotations (NASDAQ)
Deep Fission	Jun 18, 2026	National Association of Securities Dealers Automated Quotations (NASDAQ)

See a more detailed list of IPOs

Companies founded by alumni from top colleges in the Nuclear Energy sector

Most number of Nuclear Energy startups have been founded by alumni from Massachusetts Institute of Technology, Stanford University and University of California (Berkeley).

College	No. of companies
Massachusetts Institute of Technology	8
Stanford University	5
University of California (Berkeley)	5
Harvard University	3
Imperial College London	2
Yale University	2
Aalto University	1
BITS Pilani	1
Carnegie Mellon University	1
Columbia University	1

Total funding in companies founded by alumni from top colleges in the the Nuclear Energy sector

In the last 10 years, University of California (Berkeley) graduates' Nuclear Energy companies have raised the most funding among top colleges. Massachusetts Institute of Technology alumni are second, and Yale University alumni are third.

College	Total Funding
University of California (Berkeley)	$4.75B
Massachusetts Institute of Technology	$4.09B
Yale University	$1.75B
Imperial College London	$775M
Stanford University	$574M
Columbia University	$514M
Harvard University	$162M
Queen's University	$133M
Aalto University	$73.8M
Tsinghua University	$58M