Posidonia is the world’s largest and most prestigious international shipping exhibition, held every two years. It brings together the global maritime community under one roof, covering everything from shipbuilding and marine technology to logistics, finance, and maritime services. Whether you are a shipowner, supplier, or procurement professional, Posidonia is the industry event you cannot afford to miss. Below, we answer the most common questions about the exhibition.
When and where does Posidonia take place?
Posidonia 2026 takes place in June 2026 at the Metropolitan Expo exhibition centre near Athens International Airport in Greece. The event runs across five days and follows a biennial schedule, meaning it is held once every two years. The host city varies between editions, and this year Athens serves as the home for the exhibition, given Greece’s dominant position in global shipping.
The Metropolitan Expo venue is purpose-built for large-scale trade events, offering multiple halls spread across hundreds of thousands of square metres. Its proximity to the airport makes it highly accessible for international visitors travelling from port cities across Europe, the Middle East, Asia, and the Americas. For the Posidonia 2026 conference in Athens, organisers expect record participation from exhibitors and visitors alike, continuing the growth trend from previous editions.
The biennial rhythm of Posidonia matters to the industry. Because it only happens once every two years, each edition carries significant weight. Deals are prepared months in advance, partnerships are formed, and major announcements are timed around it. For maritime professionals, the calendar year in which Posidonia falls is simply a busier, more strategically important year.
Who attends the Posidonia exhibition?
Posidonia attracts tens of thousands of maritime professionals from over 90 countries, including shipowners, ship managers, naval architects, marine engineers, procurement managers, ship chandlers, classification society representatives, financiers, insurers, and government officials. It is a genuine cross-section of the entire global maritime industry.
Greek shipping interests are particularly well represented, and for good reason. Greek shipowners control approximately 21% of global tonnage, operating a fleet of over 5,500 vessels. Greece is also responsible for around 70% of the EU fleet of strategically important vessels, making it a natural centre of gravity for the industry. When the biggest fleet operators in the world gather in one place, every serious maritime supplier wants to be in the room.
Beyond shipowners and operators, Posidonia draws a large number of buyers and procurement professionals who use the event to evaluate suppliers, negotiate contracts, and stay current on new products and technologies. For suppliers, this concentration of decision-makers in one location over five days is an opportunity that is difficult to replicate through any other channel.
What industries and sectors does Posidonia cover?
Posidonia covers the full breadth of the maritime and shipping industry, including shipbuilding and repair, marine equipment and technology, shipping finance and insurance, port and terminal operations, offshore energy, environmental compliance, and maritime logistics. It is not limited to a single niche but instead reflects the complete ecosystem that keeps global shipping moving.
Key sector categories represented at the exhibition include:
- Shipbuilding, conversion, and repair
- Marine engineering and propulsion systems
- Navigation, communication, and safety equipment
- Steel, pipes, fittings, and raw materials supply
- Offshore and energy sector services
- Port infrastructure and logistics
- Shipping finance, insurance, and legal services
- Environmental technology and emissions compliance
- Manning, crewing, and maritime education
This breadth is part of what makes Posidonia uniquely valuable. A procurement manager sourcing structural steel and pipe fittings for a vessel refit sits alongside a naval architect evaluating new propulsion technology and a shipping company CFO reviewing financing options. The cross-sector exposure creates conversations and connections that would not happen in a narrower, more specialised event.
Why is Posidonia important to the global shipping industry?
Posidonia is important to the global shipping industry because it serves as the primary meeting point for the world’s most powerful fleet operators and their entire supply chain. With Greek shipowners controlling 21% of global tonnage and significant shares of the world’s oil tanker, bulk carrier, LNG carrier, and containership fleets, the decisions made at Posidonia have a direct impact on global trade flows.
The Greek fleet’s reach is remarkable. It represents 30% of the world’s oil tanker fleet, 25% of bulk carriers, 23% of LNG carriers, 15% of chemical and product tankers, 13% of LPG carriers, and 9% of containerships. When the operators of these vessels gather with their suppliers and partners, the conversations that take place shape procurement decisions, technology adoption, and commercial relationships across the entire industry.
Beyond the numbers, Posidonia carries cultural and commercial weight that goes beyond any single transaction. Long-term supplier relationships are established here. New products are launched with maximum visibility. Industry trends are debated and direction is set. For anyone operating in the maritime supply chain, being present at Posidonia signals credibility and commitment to the sector in a way that few other activities can match.
What can maritime suppliers and buyers do at Posidonia?
At Posidonia, maritime suppliers and buyers can exhibit products and services, hold pre-arranged business meetings, attend technical conferences and seminars, evaluate new technologies, negotiate contracts, and build the kind of face-to-face relationships that drive long-term commercial partnerships. The exhibition functions simultaneously as a trade show, a conference, and a networking event.
For suppliers, the primary opportunity is visibility. With tens of thousands of qualified buyers walking the exhibition halls over five days, Posidonia offers unmatched access to decision-makers across shipowning, ship management, offshore, and industrial sectors. Exhibitors use the event to launch new products, demonstrate technical capabilities, and reinforce existing relationships with key accounts.
For buyers and procurement professionals, Posidonia is an efficient way to evaluate a large number of suppliers in a short time, compare offerings side by side, and stay informed about new materials, standards, and technologies entering the market. Rather than scheduling individual supplier visits across multiple countries, buyers can accomplish months of supplier evaluation in a single week.
We are proud to be part of the Posidonia community. As a specialist supplier of steel, pipes, fittings, and related metals with locations in Rotterdam and Houston, Marine Steel serves the exact customer base that gathers at this exhibition every two years. If you are attending Posidonia 2026 and want to speak with us about your steel and pipe requirements, we would be glad to connect. Our team brings over 15 years of experience in maritime and offshore supply, and we are always ready to think along with you on specifications, availability, and fast delivery.
