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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

Masterson, Claire Siobhan

    Related profiles found in government register
  • Masterson, Claire Siobhan
    British chief financial officer born in October 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • icon of address 3, Bunhill Row, London, England, EC1Y 8YZ, United Kingdom

      IIF 1
  • Masterson, Claire Siobhan
    British company director born in October 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • icon of address 77, Blenheim Crescent, London, W11 2EG, United Kingdom

      IIF 2
  • Masterson, Claire Siobhan
    British director born in October 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
  • Masterson, Claire Siobhan
    British managing director born in October 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
  • Mrs Claire Siobhan Masterson
    British born in October 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
child relation
Offspring entities and appointments
Active 11
  • 1
    icon of address Px Box 286, Floor 2, Trafalgar Court, Les Banques, St Peter Port, Guernsey
    Active Corporate (4 parents)
    Officer
    icon of calendar 2025-05-22 ~ now
    IIF 1 - Director → ME
  • 2
    SUMITOMO PHARMACEUTICALS EUROPE LIMITED - 2006-04-03
    SUNOVION PHARMACEUTICALS EUROPE LTD. - 2021-08-23
    SUNOVION PHARMACEUTICALS EUROPE LTD - 2013-04-02
    SUMITOMO PHARMACEUTICALS UK LIMITED - 2001-10-01
    DAINIPPON SUMITOMO PHARMA EUROPE LTD. - 2013-04-02
    icon of address 3 Bunhill Row, London, England
    Active Corporate (3 parents, 1 offspring)
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 4 - Director → ME
  • 3
    icon of address 28 Dulwich Village, London, England
    Dissolved Corporate (2 parents)
    Equity (Company account)
    1,000 GBP2023-03-31
    Officer
    icon of calendar 2021-03-01 ~ dissolved
    IIF 12 - Director → ME
    Person with significant control
    icon of calendar 2021-03-01 ~ dissolved
    IIF 13 - Right to appoint or remove directorsOE
    IIF 13 - Ownership of voting rights - More than 25% but not more than 50%OE
    IIF 13 - Ownership of shares – More than 25% but not more than 50%OE
  • 4
    icon of address 28 Dulwich Village, London, England
    Active Corporate (2 parents)
    Equity (Company account)
    -6,605 GBP2024-03-31
    Officer
    icon of calendar 2021-02-27 ~ now
    IIF 10 - Director → ME
    Person with significant control
    icon of calendar 2021-02-27 ~ 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
    IIF 15 - Right to appoint or remove directorsOE
  • 5
    icon of address 3 Bunhill Row, London, England
    Active Corporate (5 parents, 1 offspring)
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 3 - Director → ME
  • 6
    icon of address 3 Bunhill Row, London, England
    Active Corporate (5 parents, 1 offspring)
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 7 - Director → ME
  • 7
    icon of address 3 Bunhill Row, London, England
    Active Corporate (6 parents, 1 offspring)
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 8 - Director → ME
  • 8
    icon of address 3 Bunhill Row, London, England
    Active Corporate (4 parents, 1 offspring)
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 6 - Director → ME
  • 9
    icon of address 3 Bunhill Row, London, England
    Active Corporate (3 parents, 1 offspring)
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 9 - Director → ME
  • 10
    icon of address 28 Dulwich Village, London, England
    Dissolved Corporate (2 parents)
    Equity (Company account)
    0 GBP2025-02-22
    Officer
    icon of calendar 2020-12-04 ~ dissolved
    IIF 11 - Director → ME
  • 11
    icon of address 3 Bunhill Row, London, England
    Active Corporate (3 parents)
    Equity (Company account)
    Retained earnings (accumulated losses)
    5,425,816 GBP2022-03-31
    Officer
    icon of calendar 2024-08-15 ~ now
    IIF 5 - Director → ME
Ceased 2
  • 1
    icon of address 34 Brook Street, London, England
    Active Corporate (3 parents)
    Equity (Company account)
    -310,919 GBP2023-12-31
    Officer
    icon of calendar 2022-08-08 ~ 2024-04-30
    IIF 2 - Director → ME
  • 2
    icon of address 28 Dulwich Village, London, England
    Dissolved Corporate (2 parents)
    Equity (Company account)
    0 GBP2025-02-22
    Person with significant control
    icon of calendar 2020-12-04 ~ 2021-03-31
    IIF 14 - Ownership of shares – 75% or more OE
    IIF 14 - Ownership of voting rights - 75% or more OE
    IIF 14 - Right to appoint or remove directors OE

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Contains public sector information retrieved at 26 August 2025 and licensed under the Open Government Licence v3.0.