Corporate Equity
Participation
Impact
| Financing threshold: | €1,450,353.60 |
|---|---|
| Maximum issue size: | €2,450,387.25 |
| Invested so far: | €961,960.69 |
Investors on Invesdor have previously financed multiple wind projects through project finance debt, gaining exposure to renewable energy assets. With Fibersail, they can now also participate in the technology that monitors, optimises and potentially extends the performance of those underlying assets. For investors who already know wind as a project-finance asset class, this equity opportunity is a natural extension of that experience.
Undetected blade damage can lead to expensive repairs and lost production. Fibersail targets this risk with a monitoring system that aims to reduce downtime and protect the value of wind‑farm assets.
Learn moreFibersail uses patented full‑blade fibre‑optic sensing and analytics that can be applied across different turbine models and has already been deployed on operating turbines.
Learn moreThe system is in paid use or qualification on 13 turbines with utilities and IPPs such as Naturgy, ERG, Nadara, TotalEnergies and others, indicating industry willingness to test and pay for the solution.
Learn moreFibersail sells hardware per turbine and aims to build growing subscription revenues for monitoring and blade‑health insights as the installed base increases.
Learn moreA founder‑led team with long experience in wind power, engineering, software, data and AI, supported by a supervisory board that includes senior wind‑industry executives.
Learn moreThe round is anchored by €950,000 from sector investors such as Skirderf Capital and InnoMarket, providing a funding base for the next growth phase.
This equity round on Invesdor aims to fund Fibersail’s commercial roll‑out, key hires, industrialisation of hardware and further development of its blade‑monitoring software and analytics.
Your investment made under the Regulation (EU) 2020/1503 of the European Parliament and of the Council is not protected by the deposit guarantee schemes etablished under Directive 2024/49/EU (Deposit Guarantee Schemes Directive). Your investment is also not protected by the investor compensation schemes established under Directive 97/9/EC (Investor Compensation Schemes Directive).
“As wind turbines grow larger, operators cannot afford to fly blind on blade health. At Fibersail we focus on giving them the visibility they need to protect production and extend asset life. Our paid projects with leading utilities and the support of experienced anchor investors give us a solid base to execute the next phase of our growth plan.”
— Carlos Oliveira, Co‑Founder & CEO
Wind‑farm owners operate ever larger and more complex turbines, where each blade is a high‑value component. Today they rely on periodic inspections and point‑based sensors that do not provide a continuous, full‑blade view, so early or internal damage can be missed. This can lead to unplanned downtime, costly repairs and uncertainty about the remaining life of ageing blades, especially in offshore and high‑load environments.
Fibersail provides a condition‑monitoring system that measures the full shape of each wind‑turbine blade with embedded fibre‑optic sensors and cloud‑based analytics. By tracking blade behaviour continuously during real operation, the system aims to detect and localise structural changes earlier and give operators clearer insight into blade condition. Alerts and reports are designed to support targeted maintenance, reduced unplanned downtime and better decisions on performance and blade lifetime.
Fibersail operates a B2B hardware‑enabled SaaS model. The company sells sensor and cabinet kits per turbine, then charges recurring monitoring and analytics fees for access to blade‑health insights and reports. Additional engineering and calibration services support qualification, deployment and customer‑specific use cases. As more turbines are equipped, Fibersail aims to build a growing base of recurring software revenues on top of the installed hardware.
Fibersail operates alongside existing blade‑monitoring and inspection approaches such as drone or visual inspections, vibration and acoustic monitoring, standard load or strain sensors and OEM‑specific condition‑monitoring systems. These approaches typically provide snapshots or point measurements rather than a continuous, full‑blade view. Fibersail positions itself as a complementary solution by offering continuous full‑blade shape sensing and OEM‑agnostic analytics designed to support earlier detection, localisation and performance insights. Independent, large‑scale validation versus alternative solutions is still limited and remains an important focus for the next phase.
By helping operators detect blade issues earlier and plan targeted maintenance, Fibersail aims to keep wind turbines running more reliably and for longer. This can support SDG 7 – Affordable and Clean Energy by improving the availability of renewable generation, and SDG 12 – Responsible Consumption and Production by reducing premature blade replacements and material waste. Fibersail plans to track impact through indicators such as estimated tonnes of CO2 potentially avoided through improved turbine uptime and the number of blades whose operating lifetime may be extended, based on customer data and agreed methodologies.
Fibersail’s management combines long experience in wind‑turbine technology, software and company building. This mix is important for moving from a deep‑tech prototype to an industrial, customer‑ready product and scaling commercial deployments.
The leadership team is supported by specialists in fibre‑optic sensing, data science, project management and IP, as well as a supervisory board that includes former senior executives from LM Wind Power and experienced climate‑tech investors, adding sector knowledge and governance support.
Carlos Oliveira
Co‑Founder & CEO
Carlos brings over 15 years of wind‑industry experience from Enercon, covering turbine technology integration, project leadership and business development. That background places him well placed to bridge utilities and OEMs on one side and Fibersail’s technology on the other, and to keep the company focused on the problems that matter operationally for wind‑farm owners.
Rui Figueiredo
COO
Rui also spent more than 15 years at Enercon in wind‑turbine R&D, performance engineering and operational services. His experience with leading international cross‑disciplinary engineering teams and field operations is directly relevant for ensuring that Fibersail’s solution can be deployed reliably on real turbines.
Rui Monteiro
CTO
With over 15 years in IT systems, software architecture and AI/data solutions at companies including Roche and the European Commission. Rui leads Fibersail’s software, data platform and analytics. His profile is well suited to turning sensor data into robust, scalable monitoring and insight products.
Marc de Jong
Supervisory Board Member
Former CEO of LM Wind Power, Philips Lighting and NXP Automotive, Marc brings deep experience in industrial scale‑up, blade manufacturing and global operations. His background helps Fibersail align its technology and processes with the requirements of major OEMs and utilities, and supports the company in preparing for larger‑scale deployment and partnerships in the wind sector.
Alexander Dewulf
Supervisory Board Member
Former CEO of Sonepar Belgium, Nuon Belgium, Siemens Business services, EVP Siemens Telecom. Alexander has experience in strategy making,realising international growth, services development and AI applications. His background can help Fibersail in strengthening his market position and accelerate international commercialisation. With his industrial network he can help Fibersail to identify new strategic partnerships,customers and growth opportunities.
Jan Fredriks
Supervisory Board Member
Founder of Skirderf Capital and former executive at Essent, Jan brings energy‑sector, investment and governance experience. As lead investor, he contributes to Fibersail’s strategic direction, financing strategy and stakeholder management, helping the company balance technology development with bankability, cash management and investor expectations.
Fibersail uses a holding‑and‑subsidiary structure. Investors on Invesdor invest indirectly in the Dutch holding company via a Dutch trust foundation (STAK) that holds the shares and issues depositary receipts. The operating activities and most staff are based in the Portuguese subsidiary.
Holding company
Fibersail Holding B.V.
Rotterdam, Netherlands
Fibersail Portugal, Lda.
100% operating subsidiary of Fibersail Holding B.V., responsible for R&D, production, engineering and project execution in Portugal.
Fibersail’s share capital is currently held by a mix of founding management, specialist climate‑tech and venture investors and an employee participation pool. Ownership is relatively concentrated, with Skirderf Capital as lead investor and the founder still holding a significant stake, complemented by several institutional funds and an ESOP that aligns key staff with long‑term value creation.
Before the current equity round, Fibersail Holding B.V. is majority‑owned by its lead investor Skirderf Capital and founder Carlos Oliveira, alongside climate‑tech and venture funds such as FORWARD.one, InnoMarket and ENERGIIQ. Additional investors, employee participation plans and smaller shareholders together hold the remaining stake.
| # | Shareholder | Type | Ownership |
|---|---|---|---|
| 1 | Skirderf Capital Lead investor and family office focused on energy and climate‑tech |
Institutional / family office | 32.1% |
| 2 | Carlos Oliveira HoldCo Holding company of co‑founder and CEO Carlos Oliveira |
Founding shareholder / management | 27.9% |
| 3 | FORWARD.one Dutch deep‑tech venture capital fund |
Venture capital | 11.0% |
| 4 | InnoMarket B.V. Investment vehicle linked to former LM Wind Power CEO Marc de Jong |
Strategic / industry investor | 9.0% |
| 5 | ENERGIIQ Energy innovation fund supporting clean‑energy technologies |
Institutional climate‑tech fund | 5.4% |
| Other shareholders Includes InnoEnergy, Caixa Capital, smaller investors, employee participation plans (STAK, current and future ESOP) and RSPV+2, each individually holding less than 10% of the shares. |
Other investors / ESOP | 14.6% | |
| Total | 100.0% |
*Percentages are shown before the current equity round and may change after completion of the financing.
The final use of funds depends on how much is raised in this round. The table below shows three scenarios based on different levels of Invesdor participation alongside the anchor investors, who together have committed to date €1,000,000. Total round can go up to €4,000,000, although Invesdor proposal is based on current €950,000.
In all scenarios, the equity is intended to fund working capital and key hires, commercial roll‑out with existing and new wind‑sector customers, industrialisation of the hardware and further development of Fibersail’s data and blade‑health analytics platform. A separate grant of approximately €840,000 is planned to support specific R&D and industrialisation projects.
Minimum scenario
Scenario I: approx. €1,450,000
Minimum total equity funding with full anchor commitment and minimum Invesdor participation.
| Invesdor investors | €500,000 |
| Anchor investors | €950,000 |
| Total funding | ≈ €1,450,000 |
Indicative use of funds
Medium scenario
Scenario II: approx. €1,950,000
Higher Invesdor participation on top of the full anchor commitment.
| Invesdor investors | €1,000,000 |
| Anchor investors | €950,000 |
| Total funding | ≈ €1,950,000 |
Indicative use of funds
Maximum scenario
Scenario III: approx. €2,450,000
Maximum planned Invesdor participation together with the full anchor commitment.
| Invesdor investors | €1,500,000 |
| Anchor investors | €950,000 |
| Total funding | ≈ €2,450,000 |
Indicative use of funds
Company valuation
The current equity round values Fibersail at a pre‑money valuation of €9 million. This valuation has been agreed between the company and its existing and new anchor investors and reflects an early‑commercial deep‑tech company with patented blade‑monitoring technology, first paid deployments with major wind‑sector players and a hardware‑enabled SaaS model.
|
Pre‑money valuation (current round) €9 million |
Previous funding reference (2024 convertibles) ~€8.8 million |
Fibersail has raised several million euros in equity and non‑dilutive grants to date. In 2024, the company issued convertible loans that have recently been converted into equity at a pre‑money valuation of approximately €8.8 million. The current €9 million pre‑money valuation is broadly in line with that level and has been accepted by anchor investors such as Skirderf Capital and InnoMarket. It is based on factors including the company’s patented full‑blade sensing technology, early but growing commercial traction with utilities and power producers, the size of the addressable wind‑turbine market and the potential to build recurring monitoring revenues. Any future value for investors will depend on Fibersail’s ability to execute its business plan, convert pilots into fleet‑wide deployments and manage the technical, commercial and financing risks described in the KIIS.
Since 2019, Fibersail has raised approximately €5.9 million in equity and convertible financing at holding level. These funds have been used to develop the fibre optic blade monitoring system, build the hardware and software platform, run pilot and qualification projects with utilities, OEMs and IPPs, and prepare for broader commercial roll out. In addition, the company has secured several non dilutive grants, including the current grant package of about €840,000 to support R&D and industrialisation.
The financing rounds above have funded the development and field validation of Fibersail’s full blade sensing technology, the build out of the multidisciplinary team and the first phase of commercial roll out with leading wind sector customers. Non dilutive grants have complemented these rounds by supporting R&D and industrialisation projects.
*Valuation figures are indicative, rounded and may not include all effects of options, convertibles or ESOPs.
Fibersail currently expects that, after this round and the existing grant funding, a next larger equity round may be considered around 2028. Such a follow‑on round would be intended to support broader international roll‑out, potential OEM integrations and the path towards a self‑sustaining, cash‑flow‑positive business, depending on how commercial traction and market conditions develop.
Fibersail is still in an early commercial phase, so any exit scenario is hypothetical and depends on future performance, market conditions and buyer interest. Management is focused first on building a solid operating business, with repeatable deployments, recurring monitoring revenues and strong customer relationships, which is also a prerequisite for any attractive exit scenario.
Based on the company’s technology and market, management currently sees a strategic acquisition by an industrial player as the most realistic route over the medium to long term, with other options only becoming relevant if the business reaches a larger scale and recurring revenue base. There is no guarantee that an exit will occur, or that it will happen within a specific timeframe or at a favourable valuation for investors.
|
Most likely route Sale to a turbine or service company A possible buyer could be a wind‑turbine manufacturer, blade producer or large service company that looks after many wind farms for customers. For these companies, owning a proven blade‑monitoring system could help make their turbines and service contracts more attractive by reducing downtime and improving reliability for wind‑farm owners. Timeline: medium to long term, once deployments and recurring revenues grow |
Strategic buyer Sale to an industrial monitoring company Another possible acquirer could be a company that provides software and sensors to monitor power plants and other industrial assets for utilities and energy companies. A full‑blade monitoring solution with a growing data set from operating turbines could strengthen their wind offering and help them provide better advice on performance and lifetime of wind farms. Timeline: medium term, after wider adoption across several customers |
Alternative routes Sale to a financial investor or similar deal A further option could be a sale to an investment fund that specialises in buying and combining several companies in the same sector, for example in wind‑energy services and technology. Other secondary transactions between existing and new investors are also possible at a later stage. A stock‑market listing is currently not a focus and would require a much larger and more mature business. Timeline: depends on company size, profitability and overall market |
What could drive exit value
The most attractive exit scenarios are likely to emerge once Fibersail shows repeatable deployments across different turbine models and countries, a growing base of subscription revenues for monitoring, long‑term customer relationships, and clear evidence that its system helps reduce maintenance costs or extend blade lifetimes. At that stage, potential buyers may value the combination of proven technology, an installed base of monitored turbines, and a business model that is based on both hardware and software. There is no guarantee that such an exit will occur.
Investing in growth companies is very high risk. You can lose part or all of the money you invest.
The following text is a short and strongly simplified overview of selected risks of an investment in Fibersail.
It is not complete and does not replace the detailed description of risks in the Key Investment Information Sheet (KIIS).
Before you invest, you must read the KIIS in full and with care and check whether you can understand and bear all of the risks described there.
If there are any differences between this summary and the KIIS, only the KIIS is legally binding.
Business and execution risk Fibersail must turn pilot and qualification projects into larger customer deployments. Long customer approval processes, delays in installation or turbine access, supply problems, higher costs, and problems with product performance, data or installation could slow growth and reduce revenue. The company also depends on key people and qualified staff.
Market and sector risk The wind-energy market depends on policies, permits, grid connections, power prices and customer investment decisions. Inflation, supply-chain constraints, competition and changing turbine technology can delay projects, reduce demand or put pressure on prices and margins.
Funding, return and liquidity risk Fibersail needs sufficient funding to carry out its plans. If it cannot obtain more funding, has weak cash flow or does not achieve its business plan, it could become insolvent and you could lose all of your investment. Returns may be lower than expected, delayed or not paid at all. The price paid may prove too high, forecasts may not be met, and profits may be retained instead of paid as dividends. The depositary receipts are not traded on an organised market, transfers are restricted, and you may need to hold them for a long time or sell at a loss.
Platform, investor rights and legal risk The platform could be temporarily unavailable or close, which could delay subscriptions or payments; a loss of capital solely because of a platform failure is unlikely. You invest through a STAK and receive depositary receipts, not direct shares or direct voting rights. STAK decisions, future share issues, a low-value or delayed exit, and tag-along or drag-along regulations may be unfavourable for you. Legal, regulatory, liability, intellectual-property, data and cybersecurity risks could also harm the business and the value of your investment.
A complete and detailed description of all risk factors can be found only in the KIIS in the documents section of this funding round.
This section will be regularly updated with new, project-relevant information as the financing progresses. To be informed about new updates in a timely manner, subscribe to our newsletter.
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