Startup profile · funding coverage
Radiant
Developer of portable micro-nuclear reactors for remote power and defense applications.
Stage
growth
Status
private
Coverage
full
Why Radiant is interesting
Radiant is betting liquid-metal-cooled microreactors can deliver megawatt-scale portable power faster than traditional nuclear — backed by a16z American Dynamism, Founders Fund, and a $300M Series D at $1.8B.
Key facts
- Series D (Dec 2025): $300M at $1.8B led by Draper Associates; Founders Fund among participants (Radiant press)
- Series C (Oct 2024): $100M led by DCVC; a16z, USV, Founders Fund continued (Radiant press)
- Series B (Apr 2023): $40M led by a16z American Dynamism; Founders Fund, Cantos participated (Radiant blog)
- Co-investors not in VCT directory: DCVC, Draper Associates
Investors in our directory
Funds linked from Radiant's profile — open a fund page for stage focus and related deal articles.
Industries
Deep Tech Defense Tech Climate Tech
Industry hub pages are rolling out from our fund-derived baseline taxonomy.
Related funding articles
Venture Capital Tracker pieces that cover Radiant's financing or category context.
FAQs about Radiant
Funding context and why this company shows up in venture coverage.
Radiant builds portable micro-nuclear reactors designed to replace diesel generators at remote industrial and defense sites with factory-built, transportable power units.
Directory-linked investors include Andreessen Horowitz (/fund/andreessen-horowitz), Founders Fund (/fund/founders-fund), Union Square Ventures (/fund/union-square-ventures), and Cantos (/fund/cantos).
Radiant raised a reported $300M Series D at a $1.8B valuation in December 2025, following a $100M Series C in 2024.
Data centers, defense outposts, and remote industry need reliable megawatt power without diesel logistics — Radiant targets faster deployment than conventional nuclear plants.
No — Radiant remains a private company developing and testing reactor prototypes.
Last updated: 2026-07-24