NuCube Energy
PrivateLast Round
M&A
Jun 25, 2026
Est. Valuation
$625M
Total Funding Raised
$13M
Momentum
Top 25%
of companies Caplight tracks
Company Overview
NuCube Energy is a CleanTech company developing a high-temperature modular microreactor designed to provide both electricity and industrial heat.
Sector
Energy & Sustainability
Verticals
Renewable Energy, Smart Grid
Business Model
B2B
Customer Profile
Hardware Sales, Services & Consulting, Data as a Service
AI Layer
Infrastructure
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
NuCube Energy Comparables
Compare NuCube Energy with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| NANO Nuclear Energy | 86% | |
| Brookfield Infrastructure Finance ULC | 82% | |
| Aalo Atomics | 82% |
NuCube Energy Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| M&A | Jun 25, 2026 | ||||
| Seed | Feb 19, 2026 | ||||
| Accelerator | Jul 16, 2025 | ||||
| Seed | Jul 13, 2025 |
Key People
Founding team and executive leadership
NuCube Energy Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Idealab Studio | Seed |
| Emissions Reduction Corp. | Seed |
| Halliburton Labs | Accelerator |
| Shell GameChanger | Seed |
| Arizona Nuclear Ventures | Seed |
| Hennessy Capital Group | M&A |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 3, 2026
Open roles increased to 6, 3x the trailing average.
- Aug 1, 2026
Grew 36% QoQ, from 11 to 15 employees.
Recent news
Latest coverage and updates
- partners_withOct 19, 2026
NuCube Energy, Inc. and Idaho State University work together on a proposed research and test reactor for education and technology demonstration rather than electricity generation.
- partners_withAug 25, 2026
NuCube Energy, Inc. and Canadian Nuclear Laboratories Ltd. have begun a research and development collaboration in Canada to qualify experimental data and benchmark computational models for heat pipe performance above 900 degrees Celsius, supporting NuCube Energy, Inc.'s factory-built microreactor design and expected licensing pathway in Aug '26.
- is_developingAug 25, 2026
NuCube Energy, Inc. is developing factory-built microreactors based on its NuSun(TM) platform, a solid-state, heat-pipe-cooled design aimed at providing passively safe, firm, carbon-free electricity and high-temperature process heat, as of Aug 25th '26.
- is_developingAug 12, 2026
NuCube Energy, Inc. signs a memorandum of understanding with Alaska Fund to create NuAlaska, a joint initiative that facilitates deployment of its NuSun-1 reactor in Alaska, with Alaska Fund leading financing, construction, and ownership.
NuCube Energy Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
Request accessFrequently Asked Questions
Common questions about NuCube Energy's valuation, stock price, and market status.
Is NuCube Energy a public or private company?
NuCube Energy is a private company.
What is the current stock price of NuCube Energy?
NuCube Energy is a private company, so its shares have no public market price. Caplight tracks NuCube Energy's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is NuCube Energy worth (valuation)?
NuCube Energy's valuation is estimated at $625.0M based on funding round data.
Can I buy NuCube Energy stock?
NuCube Energy shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was NuCube Energy's last funding round?
NuCube Energy's most recent funding round was M&A on June 25, 2026.
Who are the main investors in NuCube Energy?
Key investors in NuCube Energy include Halliburton Labs, Arizona Nuclear Ventures.
Will NuCube Energy IPO soon?
No public IPO plans have been announced for NuCube Energy.
How can I track NuCube Energy secondary market activity?
Caplight tracks bids, offers, and trades in NuCube Energy's shares on secondary markets.