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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

Mr Derek Mcmahon

    Related profiles found in government register
  • Mr Derek Mcmahon
    Irish born in September 1967

    Resident in Northern Ireland

    Registered addresses and corresponding companies
    • 15a, Mccrums Court, Scotch Street, Armagh, BT61 7BY, Northern Ireland

      IIF 1
    • 1 Rath Lir, Keady, Co. Armagh, BT60 3EW, Northern Ireland

      IIF 2
  • Mr Derek Mcmahon
    Irish born in September 1967

    Resident in Ireland

    Registered addresses and corresponding companies
  • Mcmahon, Derek
    Irish born in September 1967

    Resident in Northern Ireland

    Registered addresses and corresponding companies
    • 1 Rath Lir, Keady, Co. Armagh, BT60 3EW, Northern Ireland

      IIF 6
  • Mcmahon, Derek
    Irish born in September 1967

    Resident in Ireland

    Registered addresses and corresponding companies
  • Mcmahon, Derek
    Irish company director born in September 1967

    Resident in Ireland

    Registered addresses and corresponding companies
    • 15a, Mccrums Court, Scotch Street, Armagh, BT61 7BY, Northern Ireland

      IIF 10
  • Mcmahon, Derek
    Irish director born in September 1967

    Resident in Ireland

    Registered addresses and corresponding companies
    • 15a Mccrums Court, Armagh, Co. Armagh, BT61 7BY, Northern Ireland

      IIF 11
    • 39 Castle Lawns, Tallagh, Co. Dublin, Ireland

      IIF 12
child relation
Offspring entities and appointments
Active 3
  • 1
    PROJECT ROOFING INTERNATIONAL LTD
    NI654194
    15a Mccrums Court, Armagh, Co. Armagh, Northern Ireland
    Active Corporate (2 parents)
    Equity (Company account)
    2 GBP2024-07-31
    Officer
    2018-07-04 ~ now
    IIF 9 - Director → ME
    Person with significant control
    2018-07-04 ~ now
    IIF 5 - Ownership of shares – More than 25% but not more than 50%OE
  • 2
    PROJECT ROOFING IRELAND LTD
    NI644706
    15a Mccrums Court Scotch Street, Armagh, Northern Ireland
    Active Corporate (2 parents)
    Equity (Company account)
    60 GBP2024-03-31
    Officer
    2017-03-21 ~ now
    IIF 6 - Director → ME
    Person with significant control
    2017-03-21 ~ now
    IIF 2 - Ownership of shares – More than 25% but not more than 50%OE
  • 3
    SEALMAX MAINTENANCE & REBURBISHMENT LTD
    NI709914
    15a Mccrums Court, Armagh, Co. Armagh, Northern Ireland
    Active Corporate (3 parents)
    Person with significant control
    2024-02-12 ~ now
    IIF 3 - Ownership of shares – More than 25% but not more than 50%OE
Ceased 5
  • 1
    NADIA HOLDINGS LTD
    NI708809
    15a Mccrums Court, Armagh, Co. Armagh, Northern Ireland
    Active Corporate (2 parents, 2 offsprings)
    Officer
    2024-01-22 ~ 2024-01-22
    IIF 12 - Director → ME
    Person with significant control
    2024-01-22 ~ 2025-03-03
    IIF 4 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 4 - Ownership of shares – More than 25% but not more than 50% OE
  • 2
    NADIA PROPERTY HOLDINGS LTD
    NI712722
    15a Mccrums Court, Armagh, Co. Armagh, Northern Ireland
    Active Corporate (3 parents)
    Officer
    2024-03-27 ~ 2024-03-27
    IIF 11 - Director → ME
  • 3
    SEALMAX MAINTENANCE & REBURBISHMENT LTD
    NI709914
    15a Mccrums Court, Armagh, Co. Armagh, Northern Ireland
    Active Corporate (3 parents)
    Officer
    2024-02-12 ~ 2025-02-11
    IIF 7 - Director → ME
  • 4
    SEALMAX ROOFING AND CLADDING LTD - now
    SEALMAX ROOFING AND CLADING LTD
    - 2025-03-03 NI712724
    15a Mccrums Court, Armagh, Co. Armagh, Northern Ireland
    Active Corporate (3 parents)
    Officer
    2024-03-27 ~ 2024-03-27
    IIF 8 - Director → ME
  • 5
    SEALMAX ROOFING LIMITED
    NI638825
    15a Mccrums Court, Scotch Street, Armagh, Northern Ireland
    Active Corporate (2 parents)
    Equity (Company account)
    Retained earnings (accumulated losses)
    214,539 GBP2024-06-30
    Officer
    2016-06-02 ~ 2022-09-19
    IIF 10 - Director → ME
    Person with significant control
    2016-06-02 ~ 2022-09-19
    IIF 1 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 1 - Ownership of shares – More than 25% but not more than 50% OE

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