Flux XII
PrivateLast Round
Seed
Nov 4, 2025
Total Funding Raised
$5.05M
Momentum
Top 50%
of companies Caplight tracks
Company Overview
Flux XII operates in Energy & Sustainability and is based in Madison, Wisconsin. Its latest recorded funding round was a Seed round in November 2025.
Flux XII is an energy storage company that develops advanced materials and modules for aqueous flow batteries to transform intermittent renewable power into reliable grid capacity.
Sector
Energy & Sustainability
Verticals
Energy Storage, Advanced Materials, Renewable Energy, Smart Grid, Sustainable Materials
Business Model
B2B
Customer Profile
Hardware Sales, Government Contracts, Services & Consulting
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Flux XII Comparables
Compare Flux XII with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Quino Energy | 94% | |
| CarbeniumTec | 89% | |
| Otoro Energy | 89% |
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Flux XII Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Seed | Nov 4, 2025 | ||||
| Accelerator | Apr 29, 2025 | ||||
| Pre Seed | Sep 1, 2023 |
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Key People
Founding team and executive leadership
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Flux XII Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| gener8tor | Accelerator, Seed |
| Gigascale Capital | Pre Seed, Seed |
| The Grantham Foundation for the Protection of the Environment | Seed |
| Collaborative Fund | Pre Seed, Seed |
| Safar Partners | Pre Seed, Seed |
| Desai Ventures | Seed |
| Activate | Pre Seed, Seed |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Jul 25, 2026
Monthly visitors increased 30% MoM, reaching 2.9K.
- Jan 8, 2026
Monthly visitors increased 156% MoM, from 326 to 835.
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Flux XII 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.
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Frequently Asked Questions
Common questions about Flux XII's valuation, stock price, and market status.
Is Flux XII a public or private company?
Flux XII is a private company.
What is the current stock price of Flux XII?
Flux XII is a private company, so its shares have no public market price. Caplight tracks Flux XII's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Flux XII worth (valuation)?
Valuation information for Flux XII is not publicly available.
Can I buy Flux XII stock?
Flux XII shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Flux XII's last funding round?
Flux XII's most recent funding round was Seed on November 4, 2025.
Who are the main investors in Flux XII?
Key investors in Flux XII include The Grantham Foundation for the Protection of the Environment.
Will Flux XII IPO soon?
No public IPO plans have been announced for Flux XII.
How can I track Flux XII secondary market activity?
Caplight tracks bids, offers, and trades in Flux XII's shares on secondary markets.