Waterwhelm
PrivateLast Round
Grant
Jun 27, 2025
Total Funding Raised
$4.34M
Company Overview
Waterwhelm operates in Energy & Sustainability and is based in Edinburgh. Its latest recorded funding round was a Grant round in June 2025.
Waterwhelm is a water technology company that develops and commercializes forward osmosis systems for wastewater treatment and desalination powered by waste heat.
Sector
Energy & Sustainability
Verticals
Water Treatment, Circular Economy, Clean Manufacturing
Business Model
B2B
Customer Profile
Services & Consulting, Government Contracts
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Waterwhelm Comparables
Compare Waterwhelm with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Trevi Systems | 84% | |
| SideStroem Water Technologies | 79% | |
| Oasys Water | 79% |
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Waterwhelm Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Grant | Jun 27, 2025 | ||||
| Accelerator | Oct 1, 2024 | ||||
| Grant | Jan 24, 2024 | ||||
| Grant | Dec 18, 2023 | ||||
| Grant | May 11, 2023 | ||||
Accelerator | Feb 15, 2023 |
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Key People
Founding team and executive leadership
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Waterwhelm Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Net Zero Technology Centre | Accelerator |
| Converge Challenge | Grant |
| Scottish EDGE | Grant |
| Innovate UK | Grant |
| University of Bath | Grant |
| Katapult Ocean | Accelerator |
| Scottish Investment Bank (Scottish Enterprise) | Grant |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 9, 2026
Grew 19% QoQ, from 16 to 19 employees.
- Apr 8, 2026
Monthly visitors increased 593% MoM.
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Waterwhelm 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 Waterwhelm's valuation, stock price, and market status.
Is Waterwhelm a public or private company?
Waterwhelm is a private company.
What is the current stock price of Waterwhelm?
Waterwhelm is a private company, so its shares have no public market price. Caplight tracks Waterwhelm's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Waterwhelm worth (valuation)?
Valuation information for Waterwhelm is not publicly available.
Can I buy Waterwhelm stock?
Waterwhelm shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Waterwhelm's last funding round?
Waterwhelm's most recent funding round was Grant on June 27, 2025.
Who are the main investors in Waterwhelm?
Key investors in Waterwhelm include Net Zero Technology Centre, Scotland Government.
Will Waterwhelm IPO soon?
No public IPO plans have been announced for Waterwhelm.
How can I track Waterwhelm secondary market activity?
Caplight tracks bids, offers, and trades in Waterwhelm's shares on secondary markets.