Siem Offshore is an international
offshore
Offshore may refer to:
Science and technology
* Offshore (hydrocarbons)
* Offshore construction, construction out at sea
* Offshore drilling, discovery and development of oil and gas resources which lie underwater through drilling a well
* Off ...
and
subsea shipping company registered on the
Cayman Islands with its main offices in
Kristiansand
Kristiansand is a seaside resort city and Municipalities of Norway, municipality in Agder county, Norway. The city is the fifth-largest and the municipality the sixth-largest in Norway, with a population of around 112,000 as of January 2020, f ...
,
Norway
Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...
.
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
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
.
Siem Industries (33.7%) and Ace Crown International (19.4%) are the largest owners.
History

The company was founded on 1 July 2005 as a spin-off from
Subsea 7. In September the same year it bought Rovde Shipping and has since ordered a substantial number of new vessels, primarily platform supply, anchor handling tug and supply as well as offshore subsea construction and well intervention vessels.
In 2011 the company expanded into the contracting business, when Five Oceans Services was acquired and subsequently renamed to Siem Offshore Contractors (SOC). SOC is specialized in the installation, repair and maintenance of submarine cable systems, with a regional focus on the renewable energy sector in Europe and the offshore oil and gas sector in the Middle east.
See also
*
Siem Shipping
Siem Shipping is a Norwegian shipping company based in Kristiansand, specialized in reefer, bulk and roll-on/roll-off sea carriage. Company overview
It started trading in the mid-90s as Star Reefer, before ''Siem Industries'' successfully carried ...
Shipping companies of Norway
Supply shipping companies
Companies established in 2005
2005 establishments in Norway
Companies listed on the Oslo Stock Exchange
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