Hydrostor
PrivateLast Round
Debt
Sep 16, 2025
Est. Valuation
$500M
Total Funding Raised
$571.2M
Momentum
Top 10%
of companies Caplight tracks
Company Overview
Hydrostor is an energy storage company that develops and operates long-duration energy storage systems using its patented Advanced Compressed Air Energy Storage (A-CAES) technology.
Sector
Energy & Sustainability
Verticals
Energy Storage, Renewable Energy, Smart Grid
Business Model
B2G
Customer Profile
Services & Consulting, Government Contracts
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Hydrostor Comparables
Compare Hydrostor with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Highview Power | 86% | |
| Energy Dome | 84% | |
| Form Energy | 80% |
Hydrostor Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Debt | Sep 16, 2025 | ||||
| Convertible Debt | Feb 13, 2025 | ||||
| Debt | Jan 9, 2025 | ||||
| Private Equity | Jan 10, 2022 | ||||
| VC Round | Aug 4, 2021 | ||||
Grant | Apr 15, 2021 |
Key People
Founding team and executive leadership
Hydrostor Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| CPP Investments | Private Equity, Convertible Debt |
| Sustainable Development Technology Canada | Grant |
| Amplify Capital | Growth Equity, Series B |
| BDC Capital | VC Round |
| Canoe Financial | Series B, Growth Equity |
| Goldman Sachs Asset Management Private Equity | Private Equity |
| US Department of Energy Loan Programs Office | Debt |
Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 21, 2026
Monthly visitors grew 62% MoM, reaching 13K.
- Jun 19, 2026
Monthly visitors increased 76% MoM.
Recent news
Latest coverage and updates
- is_developingSep 23, 2026
Hydrostor Inc. is developing advanced CAES on Sep 23rd '26.
- expands_facilitiesSep 2, 2026
Hydrostor Inc. expanded facilities to Australia, Australia and New Zealand, Oceania on May 1st '26.
- expands_facilitiesSep 2, 2026
Hydrostor Inc. expanded facilities to Australia, Australia and New Zealand, Oceania on Sep 2nd '26.
- expands_facilitiesSep 2, 2026
Hydrostor Inc. expanded facilities to Australia, Australia and New Zealand, Oceania on May 1st '26.
- expands_facilitiesSep 2, 2026
Hydrostor Inc. expanded facilities to Broken Hill, New South Wales, Australia, Australia and New Zealand, Oceania on Sep 2nd '26.
Hydrostor 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 Hydrostor's valuation, stock price, and market status.
Is Hydrostor a public or private company?
Hydrostor is a private company.
What is the current stock price of Hydrostor?
Hydrostor is a private company with no public stock price. No recent secondary market data is available.
How much is Hydrostor worth (valuation)?
Hydrostor's valuation is estimated at $500.0M based on funding round data.
Can I buy Hydrostor stock?
Hydrostor 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 Hydrostor's last funding round?
Hydrostor's most recent funding round was Early Funding on January 10, 2022.
Who are the main investors in Hydrostor?
Key investors in Hydrostor include CPP Investments, BDC Capital, Canoe Financial, Lorem Partners, Goldman Sachs Group, Inc..
Will Hydrostor IPO soon?
No public IPO plans have been announced for Hydrostor.
How can I track Hydrostor secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Hydrostor's secondary market activity and sign up for updates.