We own strategically located, proven, long-life reserves of high-quality industrial minerals.
Great Lakes Minerals
The largest and highest-quality limestone producer on the Great Lakes, with quarries, processing plants, docking facilities and the largest fleet of self-unloading U.S.- Flag vessels on the Lakes.
Global Stone
Operates limestone quarries and lime and limestone processing facilities serving customers located primarily in the Mid-Atlantic and southeastern United States.
Performance Minerals
Mines and processes specialized industrial minerals, primarily high-purity silica sands and muscovite mica, with facilities in the southwestern United States, Ohio and North Carolina.
Oglebay Norton Marine Services is a shipping company operating the largest fleet by vessel count on the Great Lakes, transporting bulk commodities with 12 vessels ranging from 618 to 1,000 feet in length.
Bibra Lake WA 6163, 6163, AustraliaUpdated Dec 2002
The Oil Safe Container System is a safe, sure, easy to use method of storing and dispensing lubricants and lubricating fluids in a wide variety of applications. Ideal for use in workshops, process plants, mines, factories and even home garages. The Oil Safe fully interchangeable lubrication hand tool system can save time, money and wastage.
Oil Shipping (Bunkering) B.V. provides advanced shipping and tank farm solutions including tank storage, product handling, and product shipping with a diverse fleet of vessels.
Oldendorff Carriers is one of the world’s leading dry bulk shipowners and operators, specializing in dry bulk logistics, transshipment, and dry cargo transportation with a fleet of about 780 vessels and 4,500 employees worldwide.
Oldendorff Carriers GmbH & Co. KG is a leading global dry bulk shipping company operating about 780 chartered and owned vessels, specializing in dry bulk logistics, transshipment, and sustainable shipping solutions.
Oldendorff Carriers is a leading global dry bulk shipping company operating around 780 chartered and owned vessels, specializing in bulk transportation, transshipment, and dry cargo logistics.
Omega Shipyard is a maritime company based in Moss Point, MS, United States. The company's website domain is currently for sale with no operational information available.
OmniThruster has been a world leader for over 30 years in the development of waterjet bow thrusters and maneuvering systems, providing patented designs for diverse vessel maneuverability and auxiliary propulsion worldwide.
Onomichi Dockyard Co Ltd, established in 1943 in Hiroshima Prefecture, specializes in shipbuilding, ship repair, and construction, producing a variety of high-performance vessels including bulk carriers, tankers, and Ro/Ro cargo ships.
OptiMarin develops and manufactures complete systems for Ballast Water Treatment. The OptiMar Ballast System is based on solids separation and UV irradiation and utilizes the existing ballast pumps aboard the vessel. The OptiMar System can be retrofitted to existing vessels or installed in new builds and we handle flow rates ranging from 100 m3/h up to 3000 m3/h per ballast pump.
Hopkinton, New Hampshire, United StatesUpdated May 2026
Optimar, Inc. is a maritime technology company specializing in hydrodynamics, hull design, and environmental risk assessment for various vessel types including ferries and fast ferries.
Oregon State University's College of Earth, Ocean, and Atmospheric Sciences operates marine research facilities at the Hatfield Marine Science Center in Newport, OR, serving as home port for research vessels including the RV Elakha and the RV Taani (under construction).
Orient Ship Management Norway AS provides ship management services including technical management, crewing, and operational support for maritime vessels.
Orion Engineering Services Ltd provides global recruitment and workforce solutions specializing in energy, engineering, and technical sectors including offshore and subsea vessel operations.
Offices are in Alexandria and Suez, Egypt.
Orion Shipping is a well-established company with an excellent reputation in ship management and manning services. Our Group companies have been supplying such services over the years.
Combining the specialist resources of the former individual companies and partners has enabled Orion Shipping to provide clients with an advanced range of services co-ordinated through a wider
international network.
Extensive, quality assured shipping services covering technical and crew management, manning supply, commercial management, consultancy and vessel inspection, are available through
offices in Alexandria and Suez providing direct sourcing for seafarers.
Emphasis is on flexibility - services can be provided either as individual specific elements, or as a complete package with features tailored to the precise requirements of the client - a style more suited to today's needs and owners' expectations.
The company's professional approach and commitment meet quality compliance and
accordance with the ISM Code. Orion Shipping places a high priority on training sea-going staff to ensure they meet the levels of competence demanded by the industry, the revised STCW Convention, charterer’s vetting requirements and port state inspections.