The International Union of Marine Insurance e.V. (IUMI) is a non-profit association established for the purpose of protecting, safeguarding, and advancing insurers'​ interests in marine and all types of transport insurance. It also provides an essential forum to discuss and exchange ideas, information, and statistics of common interest for marine underwriters and in exchange with other marine professionals.

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.

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.

OUCO is a Chinese manufacturer of marine cranes with over forty years of industry experience. They specialize in producing various maritime equipment, including marine cranes, winches, grab buckets, container spreaders, davit, and port hoppers. Their company has a workforce of 200 employees and a technical team of 20 experts. They have a global presence and are well-known in the Middle East and Asia.

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.

Karmøy Winch AS is a company designing and fabricating complete deck equipment solutions for tugs, anchor-handling - supply vessels, offshore construction vessels, reseach vessels, fishing vessels and oilrigs. The equipment is delivered under the product name KARM. Typical products are winches, Karm Fork, towing pins, fish pumps, deck cranes. They are a manufacturer of deck-machinery for fishing, towing and anchor-handling vessels.

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.

KJV A/S is one of the country's renowned suppliers of products within machining, transmission, automation, tools, technical articles and machine tools. Their focus is on improving their customers' competitiveness and bottom line through forward-thinking advice, innovative products, timely delivery and competitive prices.

Klaveness Combination Carrier ASA owns and operates a fleet of combination carriers. Its unique fleet is the most CO2 efficient deep-sea transportation system in the world emitting up to 40 % less CO2 compared to standard vessels. The fleet will grow even further in the coming years through the extensive new building program.

Kleven Group is the parent company for Kleven shipyard and Myklebust shipyard, and is one of the largest companies in Ulsteinvik besides Rolls-Royce Marine and Ulstein Group. Kleven Group had about 450 employees in 2011. The Kleven Group operates businesses within construction, repair and remodeling of vessels in Ulsteinvik, at Gursken and at rented facilities on Rovde.

Kona Software Lab Ltd. marks its 7th year in Bangladesh as R&D Centre and Global Solution Business Wing of KONA, which has over 20 years of dominant international presence. Globally, KONA serves 500 customers in 90 countries (ranks among top 4 banking card manufacturers). In Bangladesh, KONA serves more than 30 banks and owns 50% card market share. The notable business solutions are NexusPay and Nagad.

The KRVE is an organisation that focuses on the rendering of nautical services related to the mooring and unmooring of ships, the transport of maritime pilots and all other occurring activities related to maritime shipping.