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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

Zwart, William John

    Related profiles found in government register
  • Zwart, William John
    born in August 1950

    Resident in United States

    Registered addresses and corresponding companies
    • 45 West 60th Street, Apt 29s, New York, Ny10023, United States

      IIF 1
  • Zwart, William John
    American born in August 1950

    Resident in United States

    Registered addresses and corresponding companies
    • 27 Atterbury Road, Southampton, New York, NY 11968, United States

      IIF 2
  • Zwart, William John
    American

    Registered addresses and corresponding companies
    • 27 Atterbury Road, Southampton, New York, NY 11968, United States

      IIF 3
  • William John Zwart
    American born in August 1950

    Resident in United States

    Registered addresses and corresponding companies
    • Apt 29j, 45 West 60th Street, New York, NY 10023, Usa

      IIF 4
child relation
Offspring entities and appointments 2
  • 1
    BERCHWOOD PARTNERS LIMITED
    - now 05663770 OC316918
    BERCHWOOD LIMITED
    - 2006-02-06 05663770
    10 Norwich Street, London
    Active Corporate (2 parents, 1 offspring)
    Officer
    2005-12-29 ~ now
    IIF 2 - Director → ME
    2005-12-29 ~ now
    IIF 3 - Secretary → ME
  • 2
    BERCHWOOD PARTNERS LLP
    OC316918 05663770
    20 North Audley Street, London, United Kingdom
    Active Corporate (5 parents)
    Officer
    2009-09-10 ~ now
    IIF 1 - LLP Designated Member → ME
    Person with significant control
    2016-04-06 ~ now
    IIF 4 - Ownership of voting rights - 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.