Private company

Siem Offshore

International offshore shipping company

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.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

2005Founded1
  • Industryfreight transport, towing1
  • HeadquartersCayman Islands1
  • Websitewww.siemoffshore.com
  • Listed onOslo Stock Exchange1

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.2

Corporate structure

Siem Offshore sits at the top of its group. 2 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Timeline

  1. 2005Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2