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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

Tsappis, Oliver John William

    Related profiles found in government register
  • Tsappis, Oliver John William
    British born in July 1991

    Resident in England

    Registered addresses and corresponding companies
    • 5th Floor, Holborn Gate, 330 High Holborn, London, WC1V 7QH, England

      IIF 1
    • Burfield House, 85 Church Green Road, Bletchley, Milton Keynes, Buckinghamshire, MK3 6DA, United Kingdom

      IIF 2
  • Tsappis, Oliver John William
    British business development manager born in July 1991

    Resident in Germany

    Registered addresses and corresponding companies
    • Burfield House, 85 Church Green Road, Bletchley, Milton Keynes, MK3 6DA, United Kingdom

      IIF 3
  • Mr Oliver John William Tsappis
    British born in July 1991

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 85, Church Green Road, Bletchley, Milton Keynes, MK3 6DA, England

      IIF 4
child relation
Offspring entities and appointments 3
  • 1
    DEMYST CONSULTING LIMITED
    - now 04115352
    BRANDCREATOR LIMITED - 2017-02-21
    COSTREAM LIMITED - 2004-03-01
    5th Floor, Holborn Gate, 330 High Holborn, London, England
    Active Corporate (8 parents, 1 offspring)
    Officer
    2019-06-30 ~ now
    IIF 1 - Director → ME
  • 2
    DEMYST VENTURES LIMITED
    09469556
    Burfield House 85 Church Green Road, Bletchley, Milton Keynes, United Kingdom
    Dissolved Corporate (2 parents)
    Officer
    2015-03-04 ~ dissolved
    IIF 3 - Director → ME
  • 3
    MARKSTREAM LIMITED
    03987984
    Burfield House 85 Church Green Road, Bletchley, Milton Keynes, Buckinghamshire, United Kingdom
    Active Corporate (5 parents, 2 offsprings)
    Officer
    2018-08-24 ~ now
    IIF 2 - Director → ME
    Person with significant control
    2018-08-24 ~ now
    IIF 4 - 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.