# Aalo Atomics

> 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.

## Why it 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.

## Profile

- **Latest funding:** Series B — $100M (August 19, 2025)
- **Latest known valuation:** Undisclosed (August 19, 2025)
- **Total disclosed equity funding:** $136M
- **Stage:** growth
- **Status:** private
- **Industries:** climate-tech, deep-tech, hardware-semiconductors
- **Coverage:** full
- **Last updated:** 2026-10-29
- **Latest funding investors:** Valor Equity Partners, Alumni Ventures, 50Y, Hitachi Ventures, Fine Structure Ventures, NRG Energy, Gaingels

## 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

- Series B · $100M · August 19, 2025
  Source: https://www.aalo.com/post/aalo-closes-100m-series-b
- Series A · $30M · 2024
  Source: https://www.aalo.com/
- Seed · $6M · 2023
  Source: https://www.aalo.com/

## Investors in our directory

- https://venturecapitaltracker.com/fund/alumni-ventures
- https://venturecapitaltracker.com/fund/green-d-ventures

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** October 29, 2026

**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.

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Source: https://venturecapitaltracker.com/startup/aalo-atomics