The Three Seas Initiative (3SI), launched in 2015 by Croatia and Poland, was envisioned as an informal political platform aimed at strengthening cohesion within the European Union and across Europe by improving North–South infrastructure connectivity.
Today, the Initiative brings together 13 EU Member States: Austria, Bulgaria, the Czech Republic, Estonia, Greece, Croatia, Latvia, Lithuania, Hungary, Poland, Romania, Slovakia, and Slovenia. These thirteen participating states together represent around 31.3% of the EU’s territory and 26.7% of its population.
The 3SI’s strategic partners are Japan, Germany, Spain, Türkiye, the United States of America and the European Commission. Albania, Moldova, Montenegro and Ukraine are associated participating states.
The Initiative remains open to project-based partnerships with interested state or business actors worldwide who share the fundamental values and principles of the European Union.
Within the framework of the Initiative, two funds have been established. The first financial instrument, the Investment Fund, finances key infrastructure projects across the region of the 3SI participating states. The second one, the Innovation Fund, was developed in cooperation with the European Investment Fund. It is intended for investments in alternative investment funds to support fast-growing, innovative and technology-oriented companies, as well as established businesses operating in more traditional sectors of the economy.