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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

Hammerstein, Sean Matthew

    Related profiles found in government register
  • Hammerstein, Sean Matthew
    American born in March 1972

    Resident in England

    Registered addresses and corresponding companies
    • One Canada Square, Canary Wharf, London, E14 5AB, United Kingdom

      IIF 1
  • Hammerstein, Sean Matthew
    American chief executive born in March 1972

    Resident in England

    Registered addresses and corresponding companies
    • 1, Angel Court, London, EC2R 7HJ, England

      IIF 2
  • Hammerstein, Matthew Sean
    American managing director born in March 1972

    Resident in England

    Registered addresses and corresponding companies
    • 25, Kings Hill Avenue, Kings Hill, West Malling, Kent, ME19 4TA

      IIF 3
  • Hammerstein, Sean Matthew
    American born in March 1972

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1, Churchill Place, London, E14 5HP, United Kingdom

      IIF 4
  • Hammerstein, Matthew
    American none born in March 1972

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1, Churchill Place, London, E14 5HP, England

      IIF 5
child relation
Offspring entities and appointments
Active 2
Ceased 3
  • 1
    BARCLAYS UK AND EUROPE PLC - 2017-06-15
    1 Churchill Place, London, England
    Active Corporate (13 parents, 11 offsprings)
    Officer
    2019-07-05 ~ 2024-02-20
    IIF 5 - Director → ME
  • 2
    25 Kings Hill Avenue, Kings Hill, West Malling, Kent
    Active Corporate (13 parents)
    Equity (Company account)
    0 GBP2023-04-30
    Officer
    2012-02-09 ~ 2021-09-29
    IIF 3 - Director → ME
  • 3
    NEWTA LIMITED - 2019-01-28
    1 Angel Court, London, England
    Active Corporate (18 parents)
    Officer
    2021-07-01 ~ 2024-07-01
    IIF 2 - Director → ME

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