When was Radiant Nuclear founded?

Radiant Nuclear was founded in 2019 and became a unicorn in 2025, reaching the milestone in 6 years. It raised its 1st funding round 1 year after its incorporation.

Where is Radiant Nuclear located?

Radiant Nuclear is headquartered in Los Angeles, United States.

Who is the current CEO of Radiant Nuclear?

Doug Bernauer of Radiant Nuclear. They have also founded 1 company.

How many employees does Radiant Nuclear have?

As of Aug 31, 2026, the latest employee count at Radiant Nuclear is 578.

Is Radiant Nuclear a funded company?

Radiant Nuclear is a funded company, having raised a total of $518M across 7 funding rounds to date. The company's 1st funding round was a $1.2M Angel round, raised on Sep 22, 2020.

How much is Radiant Nuclear worth?

The latest valuation of Radiant Nuclear is $1.8B as of Dec 15, 2025.

When was the latest funding round of Radiant Nuclear?

Radiant Nuclear's latest funding was a $300M Series D round on Dec 15, 2025, with participation from 6 investors. Its primary sector is Energy Efficiency Tech. In United States, the Energy Efficiency Tech sector has seen $4.61B in funding in 2026 to date.

Is Radiant Nuclear a Energy Efficiency Tech company?

The primary sectors of Radiant Nuclear are Energy Efficiency Tech and Nuclear Energy.

Where does Radiant Nuclear rank among its competitors?

Radiant Nuclear ranks 4th amongst 110 active competitors, of which 33 are funded. It stands 5th in terms of total funding among its competitors. The most recent competitor to raise funding was Kairos Power, which secured $100M in Sep, 2026.

Who are the top competitors of Radiant Nuclear?

Radiant Nuclear's top competitors include Newcleo, NuScale Power and X Energy. Among them, Kairos Power secured the most recent funding round in September, 2026.

Radiant Nuclear - 2026 Company Profile, Team, Funding & Competitors

Radiant Nuclear is a series D company based in Los Angeles (United States), founded in 2019 by Doug Bernauer. It operates as a Provider of portable nuclear microreactor solutions. Radiant Nuclear has raised $518M in funding from investors like Andreessen Horowitz, Union Square Ventures and DCVC, with a current valuation of $1.8B. The company has 110 active competitors, including 33 funded and 6 that have exited. Its top competitors include companies like Newcleo, NuScale Power and X Energy.

Sectors and market segments that Radiant Nuclear operate in

Radiant Nuclear serves in the Energy Tech, Environment Tech, Sustainability Tech, Energy, Environment market segments.The primary business model of Radiant Nuclear are:

Company Details

Provider of portable nuclear microreactor solutions. It develops compact microreactors to deliver reliable, zero-carbon power for remote, industrial, defense, and critical infrastructure applications. Its flagship Kaleidos microreactor is designed as a portable alternative to diesel generators, offering long-duration power generation with reduced fuel dependency and improved energy resilience. It focuses on next-generation nuclear technology that enables distributed power generation in locations where traditional grid infrastructure is unavailable, unreliable, or costly.

Website: radiantnuclear.com
Email ID: *****@radiantnuclear.com

Key Metrics

Founded Year

2019

Location

Los Angeles, United States

Stage

Series D

Total Funding

$518M in 7 rounds

Latest Funding Round

Series D, Dec 15, 2025, $300M

Post Money Valuation

$1.8B as on Dec 15, 2025

Investors

Andreessen Horowitz & 28 more

Ranked

4^th among 110 active competitors

Employee Count

578 as on Aug 31, 2026

Similar Companies

Baknor

View Radiant Nuclear's full profile

Radiant Nuclear is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
Radiant Industries, Inc CIN: 7401323 , United States, Active	May 02, 2019	-	44 (As on Dec 31, 2023)	-

Radiant Nuclear has raised a total funding of $518M over 7 rounds. Its first funding round was on Sep 22, 2020. Its latest funding round was a Series D round on Dec 15, 2025 for $300M. 6 investors participated in its latest round. Radiant Nuclear has 24 institutional investors and 5 angel investors.

Here is the list of recent funding rounds of Radiant Nuclear:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Dec 15, 2025	$300M	Series D	$1.8B	-	Draper, Boost VC	Ark Invest ETFs, Chevron Technology Ventures, Friends & Family Capital, Founders Fund
Feb 13, 2025	$66M	Series C	-	-	-	-
Oct 23, 2024	$100M	Series C	-	-	DCVC	Andreessen Horowitz, Union Square Ventures, Felicis Ventures, Washington Harbour Partners, Chevron Technology Ventures, Founders Fund, Decisive Point, Boost VC, Also Capital, McKinley, Alaska Growth Capital

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View details of Radiant Nuclear's funding rounds and investors

The founders of Radiant Nuclear is Doug Bernauer. Doug Bernauer is the CEO of Radiant Nuclear.

Here are the details of Radiant Nuclear's key team members:

Doug Bernauer: Founder & CEO of Radiant Nuclear.
Contact Info: 1 email address

View details of Radiant Nuclear's Founder profiles and Board Members

Radiant Nuclear's employee count trend

Radiant Nuclear has 578 employees as of Aug 26. Here is Radiant Nuclear's employee count trend over the years:

Employee count trend for Radiant Nuclear

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Top competitors of Radiant Nuclear include Newcleo, NuScale Power and X Energy. Here is the list of Top 10 competitors of Radiant Nuclear, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Newcleo 2021, Paris (France), Public	Provider of advanced nuclear energy technologies, focused on designing, building, and operating small modular lead-cooled fast reactors	$843M	Exor, Club degli Investitori & 73 others	69/100
2nd	NuScale Power 2007, Portland (United States), Acquired	Developer of micro nuclear power plants	$198M	Doosan Enerbility, IBK Securities & 7 others	68/100
3rd	X Energy 2010, Greenbelt (United States), Public	Developer of small modular & high temperature gas cooled nuclear reactor	$1.53B	Jane Street, C5 Capital & 25 others	63/100
4th	Radiant Nuclear 2019, Los Angeles (United States), Series D	Provider of portable nuclear microreactor solutions	$518M	Felicis Ventures, Friends & Family Capital ... & 27 others	60/100
5th	TerraPower 2006, Bellevue (United States), Series D	Designer of nuclear reactors	$1.52B	ArcelorMittal, SK & 9 others	60/100
6th	Kairos Power 2016, Alameda (United States), Series C	Manufacturer of molten salt reactors	$100M	Samsung C&T, OSTI	60/100
7th	Terrestrial Energy 2013, Charlotte (United States), Series D	Developer of modular molten salt reactors for industrial heat generation	$118M	ARPA-E, Varana Capital & 3 others	59/100
8th	Westinghouse Electric 1886, United States, Acquired	Provider of advanced nuclear reactor technology and specialized energy services	-	ARPA-E, Apollo Investment Corporation & 6 others	58/100
9th	Jimmy 2021, Levallois Perret (France), Series A	Operator of thermal generators providing decarbonized heat to industrial clients	$17.3M	Eren Groupe, Otium Capital & 4 others	54/100
10th	Valar Atomics 2023, El Segundo (United States), Series B	Manufacturer of nuclear fission reactors	$1.49B	Riot, Sequoia Capital & 21 others	53/100