XL Batteries
PrivateLast Round
Seed Round
Jul 14, 2026
Total Funding Raised
$25.6M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
XL Batteries is a cleantech company that develops and provides a low-cost, grid-scale Organic Flow Battery for utility-scale energy storage.
Sector
Energy & Sustainability
Verticals
Energy Storage, Renewable Energy, Smart Grid
Business Model
B2B
Customer Profile
Hardware Sales
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
XL Batteries Comparables
Compare XL Batteries with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Quino Energy | 89% | |
| Otoro Energy | 88% | |
| Flux XII | 87% |
XL Batteries Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Seed Round | Jul 14, 2026 | ||||
| Seed | Sep 17, 2025 | ||||
| Seed | Feb 23, 2023 | ||||
| Grant | Sep 1, 2022 | ||||
| Grant | Aug 1, 2022 | ||||
Accelerator | Sep 17, 2021 |
Key People
Founding team and executive leadership
XL Batteries Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Catalus Capital | Seed |
| Xerox Ventures | Seed |
| Myriad Venture Partners | Seed |
| SIP Global Partners | Seed |
| National Science Foundation | Grant |
| Third Derivative | Accelerator |
Market signals
Structured signals derived from secondary market and firmographic data.
- Jul 14, 2026
$13M round raised
- Apr 20, 2026
Received the 2026 BloombergNEF Pioneers award.
Recent news
Latest coverage and updates
- partners_withSep 10, 2026
XL Batteries partnered with ENEOS Corporation on Sep 9th '26.
- is_developingSep 9, 2026
XL Batteries is developing low-cost, safe, and scalable organic flow battery systems on Sep 9th '26.
XL Batteries 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 XL Batteries's valuation, stock price, and market status.
Is XL Batteries a public or private company?
XL Batteries is a private company.
What is the current stock price of XL Batteries?
XL Batteries is a private company with no public stock price. No recent secondary market data is available.
How much is XL Batteries worth (valuation)?
Valuation information for XL Batteries is not publicly available.
Can I buy XL Batteries stock?
XL Batteries shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors. Visit https://www.caplight.com to learn more.
When was XL Batteries's last funding round?
XL Batteries's most recent funding round was Seed on September 17, 2025.
Who are the main investors in XL Batteries?
Key investors in XL Batteries include Catalus Capital.
Will XL Batteries IPO soon?
No public IPO plans have been announced for XL Batteries.
How can I track XL Batteries secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor XL Batteries's secondary market activity and sign up for updates.