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Private company

Global Marine

Global Marine is an American company, founded in 1958, dissolved in 2001.1

Global Marine was een offshoreboormaatschappij die in 1958 ontstond toen Union Oil alle aandelen overnam van CUSS.2 From the Dutch Wikipedia, CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1958Founded1

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USNS Glomar Explorer (T-AG-193)
Photo: U.S. Government, Public domain, via Wikimedia Commons3

Corporate structure

Global Marine is part of a group headed by Transocean. 12 entities, 5 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Transocean Steinhausen, Switzerland
    • Global Marine
    • Songa Offshore SE Limassol, Cyprus
      • SONGA OFFSHORE ENCOURAGE LIMITED Subsidiary · Limassol, Cyprus
    • Liquila Ventures Ltd. Subsidiary · Pembroke, Bermuda
    • SONGA OFFSHORE ENABLER LIMITED Subsidiary · Limassol, Cyprus
    • SONGA OFFSHORE ENDURANCE LIMITED Subsidiary · Limassol, Cyprus
    • SONGA OFFSHORE EQUINOX LIMITED Subsidiary · Limassol, Cyprus
    • Transocean International Limited Subsidiary · Hamilton, Bermuda
    • TRANSOCEAN OFFSHORE DEEPWATER DRILLING INC. Subsidiary · Dover, Delaware, United States
    • TRANSOCEAN OFFSHORE INTERNATIONAL VENTURES LIMITED Subsidiary · George Town, Grand Cayman, Cayman Islands
    • TRANSOCEAN PROTEUS LIMITED Subsidiary · George Town, Cayman Islands
    • Deepwater Discovery Owned
    • Deepwater Horizon Owned · United States
    • Deepwater Nautilus Owned
    • Development Driller III Owned
    • Discoverer Clear Leader Owned
    • GSF Development Driller II Owned
    • GSF Explorer Owned
    • IMO 9186792 Owned
    • Iolair Owned
    • Transocean John Shaw Owned

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

Timeline

  1. 2001Dissolved Dissolved1
  2. 1958Founded Founded1

Sources

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

  1. 1
  2. 2
  3. 3