Bound4blue
PrivateLast Round
Series B
Dec 9, 2025
Total Funding Raised
$69.05M
Momentum
Top 50%
of companies Caplight tracks
Company Overview
Bound4blue operates in Energy & Sustainability and is based in Cantabria. Its latest recorded funding round was a Series B round in December 2025.
Bound4blue is a clean technology company that develops automated wind-assisted propulsion systems, known as eSAILs®, to help shipowners reduce fuel costs and emissions.
Sector
Energy & Sustainability
Verticals
Maritime & Shipping, Clean Transportation, Energy Management
Business Model
B2B
Customer Profile
Hardware Sales, Services & Consulting
AI Layer
Non-AI
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Bound4blue Comparables
Compare Bound4blue with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Norsepower | 90% | |
| Anemoi Marine Technologies | 88% | |
| Econowind | 88% |
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Bound4blue Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Dec 9, 2025 | ||||
| Grant | Oct 10, 2023 | ||||
| Series A | Sep 7, 2023 | ||||
| Grant | Dec 12, 2022 | ||||
| VC Round | Jun 30, 2021 | ||||
Grant | Jun 16, 2021 |
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Key People
Founding team and executive leadership
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Bound4blue Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Sun Returns SL | Series A |
| European Climate, Infrastructure and Environment Executive Agency | Grant |
| CDTI Innvierte | VC Round |
| Kai Capital Markets | Series B, Series A |
| Motion Ventures | Series B |
| Arcano Partners | VC Round |
| Sustainable Ocean Alliance | Series A |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Apr 30, 2026
Signed Maersk Tankers as a new client.
- Apr 22, 2026
Completed installation of two suction sails for Klaveness Combination Carriers.
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Recent news
Latest coverage and updates
- signs_new_clientSep 8, 2026
Bound4blue counts Louis Dreyfus Company among the companies that select its eSAIL wind-propulsion technology.
- partners_withSep 4, 2026
In May '24, Bound4blue and Marflet Marine partner on installing four 22-metre wind-assisted suction sails aboard Santiago I, targeting 10-15% energy savings.
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Bound4blue 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 Bound4blue's valuation, stock price, and market status.
Is Bound4blue a public or private company?
Bound4blue is a private company.
What is the current stock price of Bound4blue?
Bound4blue is a private company, so its shares have no public market price. Caplight tracks Bound4blue's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Bound4blue worth (valuation)?
Valuation information for Bound4blue is not publicly available.
Can I buy Bound4blue stock?
Bound4blue shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Bound4blue's last funding round?
Bound4blue's most recent funding round was Series B on December 9, 2025.
Who are the main investors in Bound4blue?
Key investors in Bound4blue include Octave, Katapult Ocean, GTT Strategic Ventures, Katapult Ocean, OCTAVE Capital.
Will Bound4blue IPO soon?
No public IPO plans have been announced for Bound4blue.
How can I track Bound4blue secondary market activity?
Caplight tracks bids, offers, and trades in Bound4blue's shares on secondary markets.