News

• Follow-on investment strengthens the collaboration between GTT Strategic Ventures and bound4blue
• The transaction supports bound4blue’s transition to full industrialisation of its suction sail technology and acceleration of R&D

Paris, 9 December 2025 - GTT Strategic Ventures, the investment fund of the GTT Group, announces that it has increased its stake in bound4blue as part of the company’s €38 million^[1] funding round^[2], further strengthening the partnership initiated in 2023.

This renewed commitment follows the earlier investment round led by GTT Strategic Ventures and reflects the Group’s long-term confidence in bound4blue’s technology and industrial roadmap. Following this latest transaction – comprising a primary capital increase and a secondary share purchase – GTT now holds slightly more than 10.5% of the company’s voting rights.

By generating additional thrust from wind power, bound4blue’s eSAIL^® suction sails help reduce engine loads and fuel consumption, cutting vessel operating costs and CO₂ emissions. They also support compliance with regulatory frameworks such as CII, EEXI/EEDI, FuelEU Maritime and the EU ETS^[3].

The new funding will support bound4blue’s transition to full industrialisation. The company will expand production capacity in Spain and China to meet growing demand and scale to several hundred sails per year, while also accelerating its R&D programs to further enhance performance and broaden the applicability of its solutions.

bound4blue has already equipped seven vessels and has twelve more on order, representing over fifty sails. Its systems are deployed with leading ship-owners such as Maersk Tankers, Eastern Pacific Shipping, Odfjell, Klaveness Combination Carriers and BW Epic Kosan, reinforcing its position as a trusted partner in wind-assisted propulsion.

Hélène Loncin, Head of Venture Capital at GTT, commented: “We are proud to accompany bound4blue on its journey to transform maritime transport. This follow-on investment reflects our continued confidence in their vision and technology. Through GTT Strategic Ventures, we support climate tech champions who share our belief that the future of shipping lies in cleaner, smarter, and more efficient solutions. bound4blue is a remarkable example of that vision in action.”

José Miguel Bermúdez, Chief Executive Officer of bound4blue, declared: “This round signals a new phase for bound4blue. Earlier stages focused on proving the technology and validating its impact; now this new capital reinforces the long-term backing we already have from investors who understand shipping and share our industrial vision and the role this technology will play across the fleet. This funding enables us to expand capacity, accelerate our growth roadmap and advance new developments that will elevate both the technology and our services to the next level. It confirms that bound4blue is built on solid foundations and positioned for sustained global deployment.”

May Liew, Chief Executive Officer of OCTAVE Capital, declared: “We invested in Bound4Blue because suction wings have moved from promising innovation to proven, scalable climate infrastructure. For the maritime sector, where long-dated fuel transitions remain critical but still years from wide-scale adoption, this technology provides the real and immediate carbon emissions reductions needed right now.  Bound4Blue is the only player industrialising production across both Europe and Asia, positioning it to lead the category worldwide.”