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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers who have significant controls over the individuals in focus are always inapplicable. The offspring entities and appointments are those entities that the individuals in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Parent entities and officers
Inapplicable
parent relation
Individuals in focus

Sivertsen, Frank Allan

  • Sivertsen, Frank Allan
    Norwegian chief executive officer born in August 1957

    Registered addresses and corresponding companies
    • C/o Mcgrigors Llp, Johnstone House, 52-54 Rose Street, Aberdeen, AB10 1UD

      IIF 1
    • 7th Floor, 129 Wilton Road, London, SW1V 1JZ, United Kingdom

      IIF 2 IIF 3 IIF 4
child relation
Offspring entities and appointments 4
  • 1
    E.ON RUHRGAS UK NORTH SEA LIMITED
    - now SC240197
    CALEDONIA OIL & GAS LIMITED
    - 2005-11-16 SC240197
    HIGHLAND ENERGY II LIMITED - 2003-02-17
    HIGHLAND ENERGY LIMITED - 2003-01-30
    LEDGE 694 LIMITED - 2003-01-14
    Lomond House, 9 George Square, Glasgow
    Dissolved Corporate (24 parents)
    Officer
    2005-11-09 ~ 2010-09-09
    IIF 1 - Director → ME
  • 2
    PREMIER OIL E&P UK ENERGY TRADING LIMITED - now
    E.ON E&P UK ENERGY TRADING LIMITED
    - 2016-04-28 04103928
    E.ON RUHRGAS UK ENERGY TRADING LIMITED
    - 2012-02-28 04103928
    CALEDONIA ENERGY TRADING LIMITED
    - 2006-01-19 04103928
    CONSORT ENERGY TRADING LIMITED - 2003-11-10
    DWSCO 2096 LIMITED - 2000-12-04
    Teneo Financial Advisory Limited The Colmore Building, Colmore Circus Queensway, Birmingham
    Dissolved Corporate (54 parents)
    Officer
    2005-11-09 ~ 2012-08-31
    IIF 2 - Director → ME
  • 3
    PREMIER OIL E&P UK EU LIMITED - now
    E.ON E&P UK EU LIMITED
    - 2016-04-29 02907493
    E.ON RUHRGAS UK EU LIMITED
    - 2012-02-28 02907493 02761032
    CALEDONIA EU LIMITED
    - 2006-01-19 02907493
    CONSORT EU LIMITED - 2003-11-06
    TXU EUROPE UPSTREAM LIMITED - 2001-03-06
    EASTERN NATURAL GAS (OFFSHORE) LIMITED - 2000-02-17
    EASTERN THREE LIMITED - 1994-10-04
    151 Buckingham Palace Road, London, England
    Active Corporate (70 parents)
    Officer
    2005-11-09 ~ 2012-08-31
    IIF 4 - Director → ME
  • 4
    PREMIER OIL E&P UK LIMITED - now
    E.ON E&P UK LIMITED
    - 2016-04-28 02761032
    E.ON RUHRGAS UK E&P LIMITED
    - 2012-02-28 02761032 02907493
    E.ON RUHRGAS UK EXPLORATION AND PRODUCTION LIMITED
    - 2009-12-02 02761032
    RUHRGAS UK EXPLORATION AND PRODUCTION LIMITED - 2004-07-01
    HACKREMCO (NO.790) LIMITED - 1992-12-17
    151 Buckingham Palace Road, London, England
    Active Corporate (47 parents, 2 offsprings)
    Officer
    2006-03-08 ~ 2012-08-31
    IIF 3 - Director → ME

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Contains public sector information retrieved at 9 February 2026 and licensed under the Open Government Licence v3.0.