Y/Knot Invest S.A., together with its subsidiaries, invests in shipping, yachting, tourism, hospitality, and other sectors in Greece, Eurozone, and internationally. The company engages in maritime leisure activities; sells yachts; and provides chartering, cruises, and marina management services. It is also involved in the provision of yachting and marine services; marina development and operations; maritime infrastructure and logistics; hospitality and destination experiences; and technology, sustainability, and blue innovation. In addition, the company manages tourist ports; and engages in real estate business. The company was formerly known as Kiriacoulis Mediterranean Cruises Shipping SA and changed its name to Y/Knot Invest S.A. in November 2025. Y/Knot Invest S.A. was founded in 1981 and is based in Athens, Greece.