Seven Seas Capital is a boutique investment firm based in Barcelona that, in 2025, decided to lead a €3M Series A round in Ocean Ecostructures, a Spanish climate-tech startup that develops solutions to regenerate marine biodiversity through micro-reefs installed on ports, submarine cables and offshore wind farms.
| Startup | Ocean Ecostructures |
| Investor | Seven Seas Capital |
| Sector | Climate-tech · Blue economy · Marine biodiversity |
| Founded | Barcelona · Spain |
| Stage | Series A · international expansion |
| TSCFO services | Financial due diligence · External CFO · Public funding |
| Main challenge | Validating an impact investment with a clear and rigorous financial view |
| Solution | Financial analysis · ratios · cashflow · operating model · investor report |
| Key result | €3M Series A round led by Seven Seas Capital |
— 01 · STARTING POINT
An impact opportunity that deserved rigorous analysis
In 2025, Seven Seas Capital decided to lead a €3M Series A round in Ocean Ecostructures, a company with a differentiated proposition within the blue economy.
The startup had already deployed hundreds of units in Mediterranean ports, demonstrating the potential of its technology to regenerate marine biodiversity and contribute to CO₂ capture.
For Seven Seas Capital, the transaction was aligned with its climate-tech investment thesis. But before moving forward, the fund needed a complete financial due diligence process to properly understand the company, its risks, its financial structure and its ability to scale.
— 02 · WHAT WE DID
Understanding the business beyond the numbers
At The Startup CFO, we carried out a full financial due diligence process for Seven Seas Capital, with the goal of validating the investment from a rigorous, clear and decision-oriented perspective.
We reviewed Ocean Ecostructures’ P&L, balance sheet and cashflow, calculated the main financial ratios and analyzed the company’s operating model to understand how it could scale with control.
During the process, we also identified relevant points related to revenue recognition and collections management. Everything was shared transparently and constructively, providing both financial and operational context.
Financial analysis
Detailed review of P&L, balance sheet, cashflow and key financial ratios to understand the company’s real situation, risks and evolution.
Operating model and scalability
Analysis of the business model, its growth levers and Ocean Ecostructures’ ability to scale production and international expansion.
Investor report
Preparation of a clear, structured financial report adapted to Seven Seas Capital’s language, presented directly to the fund’s team.
— 03 · INVESTMENT
A due diligence process that helped move the round forward
The financial report gave Seven Seas Capital a clear view of Ocean Ecostructures before formalizing the investment.
The analysis helped organize the financial information, identify risks, explain the business model and strengthen the confidence needed to close the transaction.
Following the process, Seven Seas Capital officially led Ocean Ecostructures’ €3M Series A round, aimed at scaling production and accelerating the company’s international expansion, especially in the Middle East.
— 04 · RESULTS
A due diligence process that opened a broader relationship
Series A round
Seven Seas Capital led a €3M round in Ocean Ecostructures
Due diligence
Clear financial report to validate the investment and support the fund’s decision
Ongoing relationship
Ocean Ecostructures continued working with TSCFO as financial partner
What began as a one-off analysis for an investor became an ongoing relationship with the startup. After the transaction closed, Ocean Ecostructures decided to continue working with The Startup CFO on financial management and public funding.
This case shows how well-executed due diligence can be much more than a report. When financial analysis is clear, transparent and useful for all parties, it can help capital reach projects with real impact and become the beginning of a stronger collaboration.
