3SIIF Impact Report

The Three Seas region stretches from the Baltic to the Adriatic and Black Seas, connecting twelve countries and over 110 million people. For decades, its north–south infrastructure spine has been underbuilt relative to the rest of Europe, creating a structural gap in transport connectivity, energy independence and digital access that public funding alone cannot close. 

The Three Seas Initiative Investment Fund commissioned an independent macroeconomic impact study, assessed by EY, to measure the economic contribution of its infrastructure portfolio across Central and Eastern Europe. The study examines how €1.1 billion of committed capital - deployed across transport, energy and digital assets in 13 countries - has generated broader economic value through supply chain effects, private investment mobilisation and lasting improvements to regional productivity and competitiveness.