Startup profile · funding coverage
Aalo Atomics funding, valuation and investors
Nuclear startup making factory-built reactors for data centers; raised $100M Series B with Alumni Ventures in August 2025 and reported first criticality in July 2026.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series B
$100M · August 19, 2025
Latest known valuation
Undisclosed
Series B · August 19, 2025
Total disclosed equity funding
$136M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
growth · Austin, Texas, United States
Investors in latest funding
Lead: Valor Equity Partners
Other: Alumni Ventures , 50Y , Hitachi Ventures , Fine Structure Ventures , NRG Energy , Gaingels
Overview
Aalo Atomics designs sodium-cooled modular nuclear reactors and factory-assembled Aalo Pods intended to supply electricity to data centers and other customers. It raised $6M seed in 2023 and $30M Series A in 2024 according to its timeline. On August 19, 2025 it announced a $100M Series B led by Valor Equity Partners with Alumni Ventures among the named investors.
On July 4, 2026, Aalo reported sustained criticality at its Critical Test Reactor at Idaho National Laboratory. This was a zero-power reactor-physics milestone, not commercial generation; the company plans a separate 10 MWe powered Aalo-X reactor and future 50 MWe modular Pods. A July 30, 2026 partnership with Crusoe was for developing a future nuclear-powered AI factory, not a completed operating data center.
Aalo's website reports over $300M funding by 2026, but individual post-Series B round dates and terms are not fully established in the cited releases.
Why Aalo Atomics is interesting
Aalo's July 2026 zero-power criticality is a meaningful technical test milestone, not proof that a commercial grid-connected plant is producing electricity. Its 2025 $100M Series B explicitly named Alumni Ventures. The next value drivers are powered operation, licensing, fuel and factory economics.
Product & use cases
Aalo develops compact nuclear reactor hardware and modular power units for large loads such as AI data centers. Its Critical Test Reactor supports physics and safety testing; later power-producing commercial projects would be separately licensed and built.
- Firm power generation for high-density data centers
- Modular nuclear generation for industrial loads
- Factory-manufactured reactor components and validation infrastructure
Key facts
- August 19, 2025: $100M Series B led by Valor Equity Partners with Alumni Ventures participating.
- July 4, 2026: announced criticality at its zero-power Critical Test Reactor; no grid power at that test.
- July 30, 2026: development partnership with Crusoe for a planned nuclear-powered AI data center.
- Aalo's timeline reports more than $300M raised overall; other financing amounts/dates require additional sourced reconciliation.
Funding history (newest first)
Series B
2025-08-19 $100M Valuation: Undisclosed- Valor Equity Partners (lead)
- Alumni Ventures (participant)
- 50Y (participant)
- Hitachi Ventures (participant)
- Fine Structure Ventures (participant)
- NRG Energy (participant)
- Gaingels (participant)
Source: Read source · aalo.com
Series A
2024 $30MSource: Read source · aalo.com
Seed
2023 $6MSource: Read source · aalo.com
Investors in our directory
Funds linked from Aalo Atomics's profile — open a fund page for stage focus and related deal articles.
Competitive landscape
Edge: An emphasis on repeatable manufacturing and modular deployment may reduce site construction time, but regulatory approvals, fuel supply, safety performance, project costs and actual power output remain unproven at scale.
The critical distinction for investors is zero-power experimental criticality versus a power-producing, grid-connected plant. Monitor permitted reactor construction, HALEU/fuel arrangements, core physics evidence, electrical output, customer contracts and capital needs.
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X-energy direct
Advanced modular reactor and fuel developer; already Nasdaq-listed as XE in 2026.
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Oklo direct
Public advanced fission developer targeting smaller power applications.
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Radiant adjacent
Very small modular nuclear units with different deployment and fuel strategy.
Industries
Market / IPO context
Editorial / static context — not a live quote.
FAQs about Aalo Atomics
Practical answers founders, operators, and investors typically search for.
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Editorial note: AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.