Posidonia Exhibitions S.A. (Posidonia Events S.A.) is a leading Greek trade fair organizer specializing in the international shipping and sea tourism industries, headquartered in Piraeus, Greece.

The company is best known as the organizer of Posidonia (International Shipping Exhibition) and the Posidonia Sea Tourism Forum, creating high-value B2B platforms for global maritime stakeholders, innovation showcases, and industry networking.