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Radiant has closed $165 million in Series C funding led by DCVC to advance mass-produced nuclear microreactors.

PRIVATEJun 03, 2025

Amount Raised

$165 Million

Round Type

Series C

El SegundoManufacturingEnergyRenewable Energy

Investors

Andreessen Horowitz’s American Dynamism teamNucleation CapitalARK Venture FundGigascale CapitalMcKinley AlaskaDecisive PointDraper AssociatesUnion Square VenturesBoost VCChevron Technology VenturesWashington Harbour Partners LpFounders FundStepstoneHartbeat VenturesFelicisAlso CapitalPax VenturesGiant VenturesHanwha Asset Management Venture FundSgaCrossbeam Venture PartnersAlign VenturesDcvc

Description

Radiant has successfully closed a $165 million Series C funding round to advance its mission of developing mass-produced nuclear microreactors. The round was led by DCVC and includes new investments from various other firms. This funding will support the development of their Kaleidos reactor and related facilities. Radiant is among five companies selected by the U.S

Quick answer

Radiant raised $165 Million in a Series C round, dated June 3, 2025. Investors: Andreessen Horowitz’s American Dynamism team, Nucleation Capital, ARK Venture Fund, Gigascale Capital, McKinley Alaska, Decisive Point, Draper Associates and Union Square Ventures. Radiant is based in El Segundo, California, United States.

How much did Radiant raise?
Radiant raised $165 Million in a Series C round on June 3, 2025.
Who invested in Radiant?
Andreessen Horowitz’s American Dynamism team, Nucleation Capital, ARK Venture Fund, Gigascale Capital, McKinley Alaska, Decisive Point, Draper Associates and Union Square Ventures are named as investors in this round.
What does Radiant do?
Radiant is building the world’s first mass-produced portable nuclear microreactors.
Where is Radiant based and how big is it?
Radiant is based in El Segundo, California, United States. Fundz records about 143 employees.
Who are the decision-makers at Radiant?
Fundz holds 2 contacts at Radiant, including the Vice President, Head of Talent. Names and contact details are shown to Fundz members.

Source: Fundz verified event record.

Who else raised in Energy and Renewable Energy around the same time

Companies in the same sectors as Radiant that raised within 45 days of this round, from Fundz verified event records.

  • ib vogt raised $80M (Funding Round) on July 16, 2025.
  • Lapis Carbon Solutions raised an undisclosed amount on July 16, 2025.
  • Jälle Technologies raised $2.3M (Pre-Seed) on July 16, 2025.
  • Lithos Energy raised $1.3M (Seed) on July 13, 2025.
  • Helical Fusion raised $16M (Series A) on July 11, 2025.
  • Abundia Global Impact Group, Inc. raised $5.4M on July 10, 2025.

Who to call at Radiant, and when

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Company Information

Company

Radiant

Location

1921 E. MAPLE AVENUE

El Segundo, California, United States

About

Radiant is building the world’s first mass-produced portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1 MW failsafe microreactor that can be transported anywhere power is needed. Founded in 2020, Radiant plans to test its first reactor in 2026, with initial customer deployments beginning in 2028.

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Related People

2 contacts
Verified contactsChad M., Vice President, Head of Talent hidden hiddenSee plans and pricing
Predictive Intelligence
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ML-powered predictions for Radiant's next move

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Radiant raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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