Atlas Atomics raises $400M in Series A led by General Catalyst at $1.9B valuation. The nuclear startup is developing heavy water reactor technology for reliable power generation.
Amount Raised
$400 Million
Round Type
Series A
Investors
Description
Atlas Atomics, a nuclear startup cofounded by Vivek Ramaswamy, has raised $400 million in Series A funding at a $1.9 billion valuation. General Catalyst is leading the round with participation from Andreessen Horowitz. The company is developing improved heavy water reactor technology that doesn't rely on enriched uranium. Atlas Atomics aims to deliver reliable power, increase medical and industrial isotope production, and support nuclear fuel recycling.
Quick answer
Atlas Atomics raised $400 Million in a Series A round, dated October 9, 2026. Investors: Andreessen Horowitz and General Catalyst.
- How much did Atlas Atomics raise?
- Atlas Atomics raised $400 Million in a Series A round on October 9, 2026.
- Who invested in Atlas Atomics?
- Andreessen Horowitz and General Catalyst are named as investors in this round.
- What does Atlas Atomics do?
- Atlas Atomics is a nuclear startup developing improved heavy water reactor technology that doesn't rely on enriched uranium.
Source: Fundz verified event record.
Who else raised in Biotechnology around the same time
Companies in the same sectors as Atlas Atomics that raised within 45 days of this round, from Fundz verified event records.
- Lifeplex Science raised $5.3M (Series A) on November 13, 2026.
- XTPL raised $6.5M on November 13, 2026.
- BioWraptor raised $1.5M (Pre-Seed) on November 12, 2026.
- PAM2L Biotechnologies raised an undisclosed amount on November 12, 2026.
- Skribe Medical raised $1.6M (Pre-Seed) on November 12, 2026.
- Biomatter raised $18M (Series A) on November 12, 2026.
Who to call at Atlas Atomics, and when
A new round usually means Atlas Atomics is about to hire and buy. The teams that reach out first get the meeting.
- An alert the day Atlas Atomics raises, hires an executive or expands, scored against what you sell
- The decision-makers there, with verified emails
- Who you already know at Atlas Atomics, from your own LinkedIn network
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Funding Insights
What this usually meansAtlas Atomics 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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