Energy & Utilities
Aalo Atomics
A nuclear startup developing the Aalo-X, a modular sodium-cooled reactor purpose-built for powering AI data centers, aiming for rapid, factory-built deployment rather than large-scale, site-built construction. Aalo Atomics raised $100 million in a Series B led by Valor Equity Partners in August 2025 (bringing total funding past $136 million), and its Critical Test Reactor achieved 'first criticality' on July 4, 2026, a major milestone toward commercial deployment.
Sources
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Evidence
1 source · 54% avg. source confidence
- Business Wire — Aalo Atomics secures $100M Series B for AI-data-center reactors54% source confidence
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The Story So Far
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Aalo Atomics's Timeline
A sourced, dated history of Aalo Atomics's key moments — founding to present.
Jan 2023 · Founded
Aalo Atomics was founded to develop a modular sodium-cooled reactor purpose-built for powering AI data centers.
Aug 2025 · $100M Series B led by Valor Equity Partners
Aalo Atomics secured $100 million in a Series B funding round led by Valor Equity Partners, bringing total capital raised to over $136 million, to build modular nuclear plants purpose-built for powering AI data centers.
Jul 2026 · Critical Test Reactor achieves first criticality
Aalo Atomics' Critical Test Reactor achieved 'first criticality' on July 4, 2026, a major milestone for its Aalo-X modular sodium-cooled reactor design.