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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.

Jump to: Offsprings
Parent entities and officers
Inapplicable
parent relation
Individuals in focus

O'brien, Mark

    Related profiles found in government register
  • O'brien, Mark
    Irish born in April 1976

    Resident in Ireland

    Registered addresses and corresponding companies
    • 137-139 High Street, Beckenham, Kent, BR3 1AG

      IIF 1
    • 137-139, High Street, Beckenham, Kent, BR3 1AG, United Kingdom

      IIF 2
    • 3, Cromac Place, Belfast, BT7 2JB, Northern Ireland

      IIF 3
    • 216a, Bangor Road, Holywood, BT18 0JF, Northern Ireland

      IIF 4 IIF 5
  • O'brien, Mark
    Irish chartered accountant born in April 1976

    Resident in Ireland

    Registered addresses and corresponding companies
    • Kemp House, 160 City Road, London, EC1V 2NX, United Kingdom

      IIF 6
  • O'brien, Mark
    Irish born in February 1987

    Resident in Ireland

    Registered addresses and corresponding companies
    • Unit 640, Moat House Business Centre, 54 Bloomfield Avenue, Belfast, Co. Antrim, BT5 5AD, Northern Ireland

      IIF 7
    • 116 Pace Road, Littlepace, Clonee, Dublin 15, D15W018, Ireland

      IIF 8
  • O'brien, Mark Michael
    Irish born in February 1971

    Resident in Ireland

    Registered addresses and corresponding companies
    • 1, Camden Row, Cuckoo Hill, Pinner, HA5 2AH, England

      IIF 9
  • O'brien, Mark Michael
    Irish co director born in February 1971

    Resident in Ireland

    Registered addresses and corresponding companies
    • 1, Camden Row, Cuckoo Hill, Pinner, HA5 2AH, England

      IIF 10
  • Mr Mark O'brien
    Irish born in April 1976

    Resident in Ireland

    Registered addresses and corresponding companies
    • Kemp House, 160 City Road, London, EC1V 2NX, United Kingdom

      IIF 11
  • O'brien, Mark Robert
    British born in April 1976

    Resident in Scotland

    Registered addresses and corresponding companies
    • Ar Tigh, Portskerra, Melvich, Thurso, KW14 7YL, Scotland

      IIF 12
  • Mr Mark O'brien
    Irish born in February 1971

    Resident in Ireland

    Registered addresses and corresponding companies
    • 1, Camden Row, Cuckoo Hill, Pinner, HA5 2AH, United Kingdom

      IIF 13 IIF 14
  • Mr Mark O'brien
    Irish born in February 1987

    Resident in Ireland

    Registered addresses and corresponding companies
    • Unit 640, Moat House Business Centre, 54 Bloomfield Avenue, Belfast, BT5 5AD, Northern Ireland

      IIF 15
    • 116 Pace Road, Littlepace, Clonee, Dublin 15, D15W018, Ireland

      IIF 16
  • O'brien, Mark

    Registered addresses and corresponding companies
    • Unit 640, Moat House Business Centre, 54 Bloomfield Avenue, Belfast, Co. Antrim, BT5 5AD, Northern Ireland

      IIF 17
    • 116 Pace Road, Littlepace, Clonee, Dublin 15, D15W018, Ireland

      IIF 18
    • Kemp House, 160 City Road, London, EC1V 2NX, United Kingdom

      IIF 19
child relation
Offspring entities and appointments 11
  • 1
    535 WEBSITES LTD
    NI730269
    Unit 640 Moat House Business Centre, 54 Bloomfield Avenue, Belfast, Co. Antrim, Northern Ireland
    Active Corporate (1 parent)
    Officer
    2025-06-09 ~ now
    IIF 8 - Director → ME
    2025-06-09 ~ now
    IIF 18 - Secretary → ME
    Person with significant control
    2025-06-09 ~ now
    IIF 16 - Ownership of voting rights - 75% or more OE
    IIF 16 - Ownership of shares – 75% or more OE
  • 2
    ANDREW DUNLOP HOMES 2 LTD
    NI710906 NI725852... (more)
    216a Bangor Road, Holywood, Northern Ireland
    Active Corporate (5 parents)
    Officer
    2024-05-31 ~ now
    IIF 5 - Director → ME
  • 3
    ANDREW DUNLOP HOMES 3 LTD
    NI710907 NI710906... (more)
    216a Bangor Road, Holywood, Northern Ireland
    Active Corporate (5 parents)
    Officer
    2025-02-17 ~ now
    IIF 4 - Director → ME
  • 4
    BUTTON NATION LIMITED
    07183674
    1 Cuckoo Hill, Pinner, England
    Active Corporate (2 parents)
    Officer
    2010-03-10 ~ now
    IIF 9 - Director → ME
    Person with significant control
    2017-01-01 ~ now
    IIF 14 - Ownership of shares – 75% or more OE
  • 5
    INISLYN LIMITED
    NI029604
    3 Cromac Place, Belfast, Northern Ireland
    Active Corporate (7 parents)
    Officer
    2024-01-11 ~ now
    IIF 3 - Director → ME
  • 6
    MANIAC COMPETITIONS LTD
    NI729879
    Unit 640 Moat House Business Centre, 54 Bloomfield Avenue, Belfast, Co. Antrim, Northern Ireland
    Active Corporate (2 parents)
    Officer
    2025-05-28 ~ now
    IIF 7 - Director → ME
    2025-05-28 ~ now
    IIF 17 - Secretary → ME
    Person with significant control
    2025-05-28 ~ now
    IIF 15 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 15 - Ownership of shares – More than 25% but not more than 50% OE
  • 7
    O'BRIEN CONSTRUCTION LIMITED
    SC050820
    Park Lane, Thurso, Caithness
    Active Corporate (12 parents)
    Officer
    2004-05-14 ~ now
    IIF 12 - Director → ME
  • 8
    SAR CROYDON LIMITED
    16380501
    137-139 High Street, Beckenham, Kent, United Kingdom
    Active Corporate (11 parents)
    Officer
    2025-10-01 ~ now
    IIF 2 - Director → ME
  • 9
    SOMERBY HOMES LIMITED
    12089961
    Kemp House, 160 City Road, London, United Kingdom
    Dissolved Corporate (1 parent)
    Officer
    2019-07-06 ~ dissolved
    IIF 6 - Director → ME
    2019-07-06 ~ dissolved
    IIF 19 - Secretary → ME
    Person with significant control
    2019-07-06 ~ dissolved
    IIF 11 - Ownership of shares – 75% or more OE
    IIF 11 - Right to appoint or remove directors OE
    IIF 11 - Ownership of voting rights - 75% or more OE
  • 10
    TH DIDCOT LIMITED
    - now 12982575
    TH SLEAFORD LIMITED - 2021-08-18
    137-139 High Street, Beckenham, Kent
    Active Corporate (7 parents)
    Officer
    2022-10-01 ~ now
    IIF 1 - Director → ME
  • 11
    THE CONTROL BOX LIMITED
    07385353
    Cronulla Thursley Road, Elstead, Godalming, England
    Dissolved Corporate (2 parents)
    Officer
    2010-09-23 ~ dissolved
    IIF 10 - Director → ME
    Person with significant control
    2016-06-01 ~ dissolved
    IIF 13 - Ownership of shares – 75% or more OE

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.