The International Association of Ports and Harbors (IAPH) is a non-governmental organisation (NGO) headquartered in Tokyo, Japan. In November 1955, some 100 world port leaders gathered in Los Angeles to announce the creation of IAPH. Over the past six decades, IAPH has developed into a global alliance of ports, representing some 160 ports and 120 port-related businesses in 87 countries.

Established in December 1987 in the Philippines, ICTSI has become an operator, innovator and pioneer in its field. Soon after consolidating and strengthening their flagship operations at the Manila International Container Terminal, they launched an international and domestic expansion program, and today, they operate in many countries across the world, employing more than 9,000 people.

International Foundation for Aids to Navigation (IFAN) is an international association that promotes safety at sea and aids to navigation through the world's busiest chokepoints and shipping routes.

IMC was founded as International Marine Consultancy in 1996 as a privately held brokerage firm that specialized in towage, sale & purchase and chartering. The headquarters of IMC are located in Antwerp, Belgium. IMC is frequently called upon by dredging contractors, construction companies and renewable energy developers to source suitable floating equipment to support a variety of maritime projects, worldwide.

International Seabed Authority (ISA) is an autonomous international organization established under the 1982 United Nations Convention on the Law of the Sea (UNCLOS) and the 1994 Agreement relating to the Implementation of Part XI of the United Nations Convention on the Law of the Sea (1994 Agreement).

The International Seafarers' Welfare and Assistance Network exists to improve the lives of seafarers and their families with services, resources, strategies and advocacy. ISWAN is a membership organisation with the International Chamber of Shipping, The International Transport Workers Federation and the International Christian Maritime Association as the core members.

The International Transport Forum at the OECD is an intergovernmental organisation with 63 member countries. It acts as a think tank for transport policy and organises the Annual Summit of transport ministers. ITF is the only global body that covers all transport modes. The ITF is administratively integrated with the OECD, yet politically autonomous.

Intership is one of the few globally operating wellboat companies, with a modern and young fleet. They have the opportunity to ensure this through their advanced vessels that utilise innovations and modern systems to offer the transport of live fish in a safe, environmentally friendly, and sustainable way.

Iris Lines, Inc. is the shipping division of the Royal Cargo Group. IRIS Lines engages in domestic and international maritime and transport services. It was established primarily to serve domestic and international shipping businesses in order to cater to the incoming and outgoing shipping needs of various locators within and outside the zone.

Irish Continental Group plc is the leading Irish-based maritime transport group. They carry passengers and cars, Roll on Roll off (RoRo) freight and Container Lift on Lift off (LoLo) freight, on routes between Ireland, Britain and Continental Europe. They also operate container terminals in the ports of Dublin and Belfast. The Group also carries out ship chartering activities.

Irish Ferries is an Irish ferry and transport company that operates passenger and freight services on routes between Ireland, Britain and Continental Europe, including Dublin Port–Holyhead; Rosslare Europort to Pembroke as well as Dublin Port-Cherbourg in France.

Irish Mainport Holdings Ltd is a provider of marine services to Ship-Owners, Exporters, Importers, Oil Companies, Seismic Survey Companies and Offshore Wind. They were founded in 1957, so being over 60 years old, they have experienced and survived many different challenges and experiences.

ITOCHU provides trading services for more than 20,000 items and manages a portfolio of more than 40 group companies. ITOCHU operates in a wide variety of businesses, with particular strength in the machinery, energy & chemicals, electronics, food, forest products, chemicals, and textiles sectors.

IVECO, a pioneering commercial vehicles brand that designs, manufactures, and markets heavy, medium, and light-duty trucks; FPT Industrial, a global leader in a vast array of advanced powertrain technologies in agriculture, construction, marine, power generation, and commercial vehicles sectors.

Jacksons Fencing has been manufacturing premium fencing, gates, and garden accessories for over 70 years and has become the leading supplier of fencing related products across the UK.

James Fisher is a global provider of specialist services to the marine, oil & gas, and other high assurance industries worldwide. They offer innovative marine solutions and specialised engineering services, along with comprehensive products, services and support to the oil and gas, marine renewables, shipping and defence industries.

James Marine, Inc. was founded by C. Ronald James in 1986. The family-owned company began with twenty-five employees and has a proud history of extraordinary service and growth to the inland waterways. With over 1,300 employees in the JMI family of companies, they have 12 locations across Kentucky and Louisiana. They proudly promote a diverse workforce with an inclusive culture that encourages creativity and a positive team environment.

JET Connectivity is supporting the safe and secure, sustainable, smart operational, global blue economy through delivering reliable, floating, offshore 5G communications and real time data.

JFE Steel Corporation is a steelmaker engaged in the total steel-making process, taking iron ore raw material and turning it into final products. Boasting one of the world's greatest capacities for steel production, JFE Steel satisfies customers by producing steel under a corporate philosophy of contributing to society with the world's most innovative technology.

Jolectra Service BV is an electrical engineering company active in the industry, panel construction, control technology, and utility construction.

Joseph Industrial Shipyard is located in Santo Domingo, Capital of the Dominican Republic. They have qualified staff and equipment to get the jobs done. Their facilities consists of docks for afloat repairs and drydocks. For bigger vessels, they can do afloat services in the different ports of the country. They have qualified human staff for servicing the ships afloat or on drydocks as fast as possible with a kind service.

The Jotun Group is a matrix organization with sales of decorative paints and marine, protective, and powder coatings organized into seven regions. The company has 38 production facilities in 23 countries, with 67 companies in 47 countries, and represented in more than 100 countries overall around the world.

Jumbo is a heavy lift shipping and offshore transportation & installation contractor. Jumbo has been developing pioneering solutions for ocean transportation for more than 50 years. Since 2003, building on their heavy lift capability, Jumbo rapidly established a sound track record in the offshore subsea installation market.

Kaiko Systems is an operational intelligence company that leverages manual operations to generate real-time insights for shipping companies to prevent incidents, increase operational efficiency, and reduce maintenance costs. With Kaiko Systems, crews are able to save 50% of the time on deck operations.

Founded in 1989, Kalgin Global Logistics has grown from a team of two with a small office on Sydney’s North Shore, to a passionate team of more than 40 professionals with offices in global locations, including Auckland, Brisbane, Melbourne, Sydney, Suva & Lautoka.

Kamer Marine provides ship management, crew management, maritime consultancy, and cargo transportation services.

Karstensen Kuldeteknikk AS are a global supplier of industrial freezing systems. Their extensive experience enables them to deliver different products to different industries. Fish processing, bakery, dairy and other are examples of this.

Kawasaki Kisen Kaisha, Ltd. (K Line) earns the trust of customers through the provision of safe, reliable transportation and logistics services. Their aim is to become an important infrastructure for global society, and to be the best partner with customers by providing the high-quality logistics services based on customer first policy.

Keihin Dock Co., Ltd. was established in 1968 with investment from Nippon Yusen Kabushiki Kaisha as a company engaged in small ship repair business. Since their founding, the company have maintained close ties with Keihin Seiki, Keihin Corporation, and Keihin Valve Corporation, integrating industrial valve manufacturing and sales operations with these companies.

Khalid Faraj Shipping (KFS) is one of the private sector Ship owners / Ship Operators based in Abu Dhabi with a current fleet strength totaling Seventy- Five (75) Vessels mainly consisting of Landing Crafts, Tug Boats, Cargo Barges, Crew Boats, Passenger Boats, Offshore Supply Vessels, Offshore Construction Support Vessels and Project Carriers.