Siem Offshore is an international offshore and subsea shipping company registered on the Cayman Islands with its main offices in Kristiansand, Norway.
The Company's fleet includes 50 vessels, of which 15 are under construction. The fleet includes platform supply vessels - PSVs, anchor handling tug and supply vessels - AHTS, multipurpose field and ROV support vessels - MRSVs, offshore subsea construction vessels - OSCVs, well intervention vessels - WIVs, scientific core drilling vessels - SCDVs and crew transport vessels - CTVs.
Furthermore, the subsidiary Siem Consub (Siem Offshore do Brasil) operates additional vessels in Brazil.
Siem Industries (33.7%) and Ace Crown International (19.4%) are the largest owners.
Offshore construction is the installation of structures and facilities in a marine environment, usually for the production and transmission of electricity, oil, gas and other resources. It is also called maritime engineering.
A platform supply vessel (PSV) is a ship specially designed to supply offshore oil and gas platforms and other offshore installations. They typically range from 50 to 100 metres in length and are distinguished by the large open deck area used to store supplies and house equipment and to allow for efficient loading and offloading. The primary function for most of these vessels is logistic support and transportation of goods, tools, equipment, and personnel to and from their destination.
Deep Sea Supply is an international operator of offshore supply vessels. It operates nine anchor handling tug supply vessels (AHTS) and two platform supply vessels (PSV). 17 ships are under construction. The main office is located in Arendal, Norway though the company is officially headquartered in Cyprus and listed on the Oslo Stock Exchange.
Farstad Shipping is a publicly listed supply shipping company with its corporate headquarters in Ålesund, Norway. The company has approximately 2,200 employees, of which 1,965 are employed offshore.
DOF ASA was the parent company of the DOF Group, a Norwegian supply shipping company. DOF ASA underwent a bankruptcy process in the Norwegian courts in 2023 and on the 25th of May 2023, a new parent company DOF Group ASA was established and the company continues to operate as an integrated offshore services supplier with global operations.
Havila Shipping ASA was established on 31 July 2003 and operates 22 vessels; platform supply vessel, anchor handling tug supply vessel, rescue- and recovery vessel and subsea construction vessel. The company has a newbuilding program of 5 vessels. The Company's business concept is to provide maritime support functions for international offshore oil and gas production, to own and run the assets regarded as necessary or desirable for this, and to provide associated services.
Solstad Offshore is a Norwegian offshore service and supply ship shipping company that operates 89 vessels and including 26 construction service vessels, 21 anchor handling tug supply vessels and 42 platform supply vessels. The company is based in Skudeneshavn, but also has offices in Ålesund, Aberdeen, Rio de Janeiro, Perth, Singapore, Manila and Odesa.
Eidesvik Offshore is a supply, subsea, seismic and cable-laying shipping company. The fleet consists of ten supply ships, both platform supply vessels and anchor handling tug supply vessels, five subsea vessels, five seismic vessels and one cable-laying ship. All the ships are orange in color, and most of them have names starting with Viking. The company is based in Bømlo, Norway and is listed on the Oslo Stock Exchange. Two thirds of the company is owned by Kristian Eidesvik, who also controls the short sea shipping company Wilson.
Rem Offshore was a fishing and supply shipping company based in Fosnavåg, Norway. The group operated two platform supply vessels, one anchor handling tug supply vessels and two multi purpose supply vessels. In addition the group had two fishing vessels.
Colombo Dockyard PLC (CDPLC) is a ship building company in Sri Lanka and it is based in Colombo. It has built both military and civilian vessels for both local and overseas clients.
Viking Supply Ships is a supply shipping company based in Kristiansand, Norway. Owned by Kistefos it owns four anchor handling tugs, six platform supply vessels and seven barges as well as for anchor handling tugs on order.
Allseas Group S.A. is a Dutch offshore contractor specialising in pipelay, heavy lift and subsea construction. It was founded in 1985 by owner and president Edward Heerema, employs 4,000 people and operates worldwide.
A pipelaying ship is a maritime vessel used in the construction of subsea infrastructure. It serves to connect oil production platforms with refineries on shore. To accomplish this goal a typical pipelaying vessel carries a heavy lift crane, used to install pumps and valves, and equipment to lay pipe between subsea structures.
Edison Chouest Offshore (ECO), which started as Edison Chouest Boat Rentals in 1960, is a family of companies in the marine transportation business based in Cut Off, Louisiana. ECO owns and operates a fleet of platform supply vessels, Subsea Construction / IMR vessels, a Riserless Light Well Intervention vessel, Anchor handling tug supply vessels, Oil Spill Response Vessels, and Well Stimulation Vessels, as well as an independently owned fleet of Research Vessels and Ice Breakers.
Qatar Gas Transport Company Limited, commonly known as Nakilat is a Qatari shipping and maritime company. Its LNG shipping fleet is one of the largest in the world, comprising 74 vessels. The company also jointly owns one Floating Storage Regasification Unit (FSRU) and 4 very large LPG carriers (VLGCs). Through its in-house ship management, Nakilat manages and operates the four very large LPG carriers and 14 LNG carriers.
Ezra Holdings Ltd, also known under their operating brand name of EMAS, is an integrated offshore support provider for the oil and gas industry. The business was founded in 1992 and is headquartered in Singapore. Ezra was listed on the Singapore Exchange Securities Trading Limited (SESDAQ) and promoted to Mainboard on 8 December 2005.
EMAS is an offshore contractor and integrated offshore solutions provider catering to the oil and gas (O&G) industry on a global scale. It operates as a subsidiary of Ezra Holdings and has gained recognition within the industry. Established in 1992, the company is headquartered in Singapore and initially focused its operations in the maritime sector of the Asia Pacific region, primarily managing a fleet of vessels. In 2003, the company successfully listed its shares on the Singapore Exchange SGX, enhancing its market presence. EMAS also established fabrication facilities in Vietnam.
Miscaroo was an icebreaking anchor handling tug supply vessel built by Vancouver Shipyards for BeauDril, the drilling subsidiary of Gulf Canada Resources, in 1983. She was part of a fleet of Canadian icebreakers used to support offshore oil exploration in the Beaufort Sea. In the 1990s, the vessel was acquired by Canadian Marine Drilling (Canmar) and renamed Canmar Miscaroo. In 1998, she was purchased by Smit International and served in the Sakhalin oil fields as Smit Sakhalin until 2017 when the 34-year-old icebreaker was sold for scrapping in China.
Siem Shipping is a Norwegian shipping company based in Kristiansand, specialized in reefer, bulk and roll-on/roll-off sea carriage.
Horizon Maritime Services Ltd is a company which provides vessels and offshore services for arctic duty in Canada and Norway. It is based in St. John's, Newfoundland and Labrador, and its joint ventures include partnerships with two First Nations, the Miawpukek and the Heiltsuk ; in addition, Horizon operates joint ventures with Kotug as Kotug Canada and with Bourbon as Bourbon Horizon.
