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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

O'sullivan, Sean Alexander

    Related profiles found in government register
  • O'sullivan, Sean Alexander
    British civil engineer born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address Pac, Penarth Athletic Club, Lavernock Rd, Penarth, Vale Of Glamorgam, CF64 3QH, United Kingdom

      IIF 1
  • O'sullivan, Sean Alexander
    British construction manager born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address 4, Sunnycroft Lane, Dinas Powys, CF64 4QQ, Wales

      IIF 2
  • O'sullivan, Sean Alexander
    British director born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address 4 Sunnycroft Lane, Dinas Powys, South Glamorgan, CF64 4QQ, Wales

      IIF 3 IIF 4 IIF 5

    • icon of address Unit 1a, Whitehouse, The Causeway, Mark, Highbridge, Somerset, TA9 4QS, England

      IIF 6

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, SA10 7DR, United Kingdom

      IIF 7
  • O'sullivan, Sean Alexander
    British engineer born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, SA10 7DR, Wales

      IIF 8
  • O'sullivan, Sean
    British director born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address 65, Corporation Road, Grangetown, Cardiff, CF11 7AP, United Kingdom

      IIF 9

    • icon of address 65 Corporation Road, Grangetown, Cardiff, South Glamorgan, CF11 7AP

      IIF 10

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, SA10 7DR, Wales

      IIF 11

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, SA10 7DR, Wales

      IIF 12
  • O'sullivan, Sean
    British engineer born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address 65 Corporation Road, Grangetown, Cardiff, South Glamorgan, CF11 7AP

      IIF 13 IIF 14
  • Mr Sean O'sullivan
    British born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, SA10 7DR, Wales

      IIF 15

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, SA10 7DR, Wales

      IIF 16
  • O'sullivan, Sean
    British director

    Registered addresses and corresponding companies

    • icon of address 65 Corporation Road, Grangetown, Cardiff, South Glamorgan, CF11 7AP

      IIF 17
  • O'sullivan, Sean
    British engineer

    Registered addresses and corresponding companies

    • icon of address 65 Corporation Road, Grangetown, Cardiff, South Glamorgan, CF11 7AP

      IIF 18
  • Mr Sean Alexander O'sullivan
    British born in November 1974

    Resident in Wales

    Registered addresses and corresponding companies

    • icon of address 4, Sunnycroft Lane, Dinas Powys, CF64 4QQ, Wales

      IIF 19

    • icon of address Unit 1b, Whitehouse, The Causeway, Mark, TA9 4QS, United Kingdom

      IIF 20

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, SA10 7DR, Wales

      IIF 21

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, SA10 7DR, United Kingdom

      IIF 22

    • icon of address Pac, Penarth Athletic Club, Lavernock Rd, Penarth, Vale Of Glamorgam, CF64 3QH, United Kingdom

      IIF 23

    • icon of address Canal Rd, Swansea, SA11 1LJ, United Kingdom

      IIF 24
  • Mr Sean O'sullivan
    British born in November 1974

    Resident in United Kingdom

    Registered addresses and corresponding companies

    • icon of address Unit 38, Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, SA10 7DR, Wales

      IIF 25
child relation
Offspring entities and appointments
Active 14
  • 1
    icon of address 4 Sunnycroft Lane, Dinas Powys, South Glamorgan, Wales
    Active Corporate (5 parents)
    Equity (Company account)
    24,812 GBP2024-09-30
    Officer
    icon of calendar 2020-09-11 ~ now
    IIF 5 - Director → ME
  • 2
    icon of address Unit 38 Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, Wales
    Active Corporate (2 parents)
    Equity (Company account)
    1,926,700 GBP2024-03-31
    Officer
    icon of calendar 2015-08-21 ~ now
    IIF 12 - Director → ME
    Person with significant control
    icon of calendar 2016-04-06 ~ now
    IIF 21 - Right to appoint or remove directors → OE
    IIF 21 - Ownership of voting rights - More than 25% but not more than 50% → OE
    IIF 21 - Ownership of shares – More than 25% but not more than 50% → OE
  • 3
    icon of address Unit 38 Neath Abbey Business Park, Neath Abbey, Neath, United Kingdom
    Active Corporate (1 parent, 1 offspring)
    Equity (Company account)
    438,522 GBP2024-03-31
    Officer
    icon of calendar 2022-03-29 ~ now
    IIF 7 - Director → ME
    Person with significant control
    icon of calendar 2022-03-29 ~ now
    IIF 22 - Right to appoint or remove directors → OE
    IIF 22 - Ownership of voting rights - 75% or more → OE
    IIF 22 - Ownership of shares – 75% or more → OE
  • 4
    icon of address Unit 38 Neath Abbey Business Park, Neath Abbey, Neath, Wales
    Active Corporate (3 parents)
    Officer
    icon of calendar 2025-10-09 ~ now
    IIF 11 - Director → ME
    Person with significant control
    icon of calendar 2025-10-09 ~ now
    IIF 15 - Ownership of shares – More than 25% but not more than 50% → OE
    IIF 15 - Ownership of voting rights - More than 25% but not more than 50% → OE
    IIF 15 - Right to appoint or remove directors → OE
  • 5
    icon of address Griffins Tavistock House South, Tavistock Square, London
    Dissolved Corporate (3 parents)
    Officer
    icon of calendar 2004-05-01 ~ dissolved
    IIF 14 - Director → ME
    icon of calendar 2004-05-01 ~ dissolved
    IIF 18 - Secretary → ME
  • 6
    icon of address Unit 38 Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, Wales
    Active Corporate (1 parent)
    Equity (Company account)
    -40,690 GBP2024-03-30
    Officer
    icon of calendar 2005-01-26 ~ now
    IIF 13 - Director → ME
    Person with significant control
    icon of calendar 2016-06-30 ~ now
    IIF 16 - Has significant influence or control as a member of a firm → OE
    IIF 16 - Right to appoint or remove directors as a member of a firm → OE
    IIF 16 - Ownership of voting rights - 75% or more → OE
    IIF 16 - Ownership of shares – 75% or more → OE
  • 7
    icon of address Hos/js Jones, Canal Road, Neath
    Dissolved Corporate (1 parent)
    Officer
    icon of calendar 2008-02-08 ~ dissolved
    IIF 10 - Director → ME
    icon of calendar 2008-02-08 ~ dissolved
    IIF 17 - Secretary → ME
  • 8
    icon of address 10 St Helens Road, Swansea
    Dissolved Corporate (2 parents)
    Equity (Company account)
    -41,067 GBP2017-03-30
    Officer
    icon of calendar 2010-03-24 ~ dissolved
    IIF 9 - Director → ME
    Person with significant control
    icon of calendar 2016-04-06 ~ dissolved
    IIF 24 - Right to appoint or remove directors → OE
    IIF 24 - Ownership of voting rights - More than 25% but not more than 50% → OE
    IIF 24 - Ownership of shares – More than 25% but not more than 50% → OE
  • 9
    icon of address 4 Sunnycroft Lane, Dinas Powys, South Glamorgan, Wales
    Active Corporate (4 parents, 2 offsprings)
    Equity (Company account)
    -890 GBP2024-09-30
    Officer
    icon of calendar 2020-09-11 ~ now
    IIF 4 - Director → ME
  • 10
    icon of address Pac Penarth Athletic Club, Lavernock Rd, Penarth, Vale Of Glamorgam, United Kingdom
    Active Corporate (3 parents)
    Equity (Company account)
    38,766 GBP2024-06-30
    Officer
    icon of calendar 2021-06-18 ~ now
    IIF 1 - Director → ME
    Person with significant control
    icon of calendar 2021-06-18 ~ now
    IIF 23 - Right to appoint or remove directors → OE
  • 11
    icon of address Unit 1b Whitehouse, The Causeway, Mark, United Kingdom
    Active Corporate (3 parents)
    Equity (Company account)
    -37,803 GBP2024-12-31
    Officer
    icon of calendar 2022-06-29 ~ now
    IIF 2 - Director → ME
    Person with significant control
    icon of calendar 2023-11-08 ~ now
    IIF 20 - Ownership of voting rights - More than 25% but not more than 50% → OE
    IIF 20 - Ownership of shares – More than 25% but not more than 50% → OE
  • 12
    icon of address 4 Sunnycroft Lane, Dinas Powys, South Glamorgan, Wales
    Active Corporate (5 parents)
    Equity (Company account)
    165,334 GBP2024-09-30
    Officer
    icon of calendar 2020-09-11 ~ now
    IIF 3 - Director → ME
  • 13
    icon of address Unit 1a, Whitehouse, The Causeway, Mark, Somerset
    Active Corporate (3 parents)
    Officer
    icon of calendar 2023-11-20 ~ now
    IIF 6 - Director → ME
  • 14
    icon of address Unit 38 Neath Abbey Business Park, Neath Abbey, Neath, West Glamorgan, Wales
    Dissolved Corporate (2 parents)
    Equity (Company account)
    3,982 GBP2020-03-31
    Officer
    icon of calendar 2016-01-26 ~ dissolved
    IIF 8 - Director → ME
    Person with significant control
    icon of calendar 2016-04-06 ~ dissolved
    IIF 25 - Right to appoint or remove directors → OE
    IIF 25 - Ownership of voting rights - More than 25% but not more than 50% → OE
    IIF 25 - Ownership of shares – More than 25% but not more than 50% → OE
Ceased 1
  • 1
    icon of address Unit 1b Whitehouse, The Causeway, Mark, United Kingdom
    Active Corporate (3 parents)
    Equity (Company account)
    -37,803 GBP2024-12-31
    Person with significant control
    icon of calendar 2022-06-29 ~ 2023-12-08
    IIF 19 - Ownership of voting rights - More than 25% but not more than 50% → OE
    IIF 19 - Ownership of shares – More than 25% but not more than 50% → OE

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Contains public sector information retrieved at 16 October 2025 and licensed under the Open Government Licence v3.0.