International Association of Dry Cargo Shipowners (INTERCARGO) represents the interests of quality dry cargo shipowners. INTERCARGO provides the forum where dry bulk shipowners, managers and operators are informed about, discuss and share concerns on key topics and regulatory challenges, especially in relation to safety, the environment and operational excellence.

International Association of Oil & Gas Producers (IOGP) are the global voice of their industry, pioneering excellence in safe, efficient, and sustainable energy supply - an enabling partner for a low carbon future. Their members, integrated energy companies, national oil companies, independent upstream operators, service companies, and industry associations operate around the globe, supplying over 40% of the world’s oil and gas demand.

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.

IAPH is a non-governmental organization (NGO) headquartered in Tokyo, Japan. In November 1955, some 100 world port gathered in Los Angeles to announce the creation of IAPH.

International Chamber of Shipping (ICS) is the principal international trade association for the shipping industry, representing shipowners and operators in all sectors and trades. ICS membership comprises national shipowners'​ associations in Asia, Europe and the Americas whose member shipping companies operate over 80% of the world's merchant tonnage.

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 Marine Supply Aps (IMS) was established in 1987 by Jens Boldreel which for many years had been a traditional general ship chandler. Martin Boldreel (son of Jens) joined the company in 1988 and the company began to concentrate on supplying ship spare parts primarily of Scandinavian origin.

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.

Established in February 2019, iO3 PTE LTD. was established to adopt an innovative approach in the digital evolution for maritime customers today. They communicate and operate efficiently and safely in challenging maritime environments. Their digitalisation platform has been specifically designed to support enhanced integrated solutions, asset optimisation, and delivery of secured critical applications globally.

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.

IRM Offshore and Marine Engineers is IMS (ISO 9001: 2015, ISO 14001:2015 and ISO 45001:2018) certified company by BUREAU VERITAS, as a Marine fender & offshore rubber manufacturer in the Indian Subcontinent. A valid Manufacturers Capability Certificate (MCC) has also been issued by BUREAU VERITAS, United Kingdom.

Irving Shipbuilding Inc. (ISI) our facilities meet International Ship and Port Security Code standards (ISPS) and operate with accordance to Transport Canada Marine Security regulations.

The Isalos.net initiative has as its main purpose the connection of the maritime community with the new generation while at the same time it is a knowledge platform for the developments and experiences from the maritime industry and maritime daily life.

Island Offshore With a fleet of highly advanced offshore service vessels, Island Offshore is a leading provider of high quality solutions to the offshore oil industry.

Italdraghe was born with the name of OMIM (Industrial Maritime Mechanical Workshop). It was only in the 1960s that OMIM became what Italdraghe is today. Since its origins, the company has understood the importance and potential of maintaining seas, rivers, canals and ports.

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.

Izumi Steel Works Ltd. was founded in 1961. The Company's line of business includes the manufacturing of steel castings including alloy, bushings, and rolling mill rolls.

Land and Marine Engineering Limited, a part of the Murphy Group of companies is an international engineering and construction company. Murphy Land and Marine offers services in the oil, gas, water and renewable energy markets, throughout the UK and internationally.

J.D. Neuhaus in the Shipyards & Maritime Industry. The shipyard and maritime industry is one of the core industries for JDN equipment. Extremely heavy ship components such as hull sections, engines, propulsion systems, or the ship’s propeller are often lifted and carefully positioned in difficult to access and narrow environments.

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.

JFD is the world leading underwater capability provider, serving the commercial and defence markets with innovative diving, submarine and hyperbaric rescue, technical solutions and services.

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.

Jan De Nul Group shapes water and land. Through a creative and innovative approach, we achieve sustainable and successful results. With us, the client can rest assured. Today, but also tomorrow.

Japan CCS Co., Ltd (JCCS) was founded in May 2008 when a group of major companies with expertise in CCS-related fields, including electric power, petroleum, oil development, and plant engineering, joined forces to answer the Japanese government’s call for development of CCS technology as a countermeasure against global warming. JCCS is a unique company in the world to be founded and dedicated explicitly to developing integrated CCS technology.

Japan Engine Corporation is involved in the development, design, manufacturing, maintenance, repair, sale and licensing of engines and other components. From development to after-sales service, they are the only company in the world that has an integrated system of the UE engine, which is one of the world's three largest brands of low-speed marine engines.

JMU is a pioneer company in the shipbuilding industry, with bases throughout Japan. Making full use of the wealth of experience and advanced technologies cultivated to date, they are aiming at further development. JMU was created by the merger of two leading-edge companies in the shipbuilding industry of Japan, Universal Shipbuilding and IHIMU.