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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

Callister, Stephen John Paul

    Related profiles found in government register
  • Callister, Stephen John Paul
    British born in January 1965

    Resident in England

    Registered addresses and corresponding companies

    • icon of address 64, Fairfield Road, Winchester, SO22 6SG, England

      IIF 1
  • Callister, Stephen John Paul
    British chief operating officer born in January 1965

    Resident in England

    Registered addresses and corresponding companies

    • icon of address Porton Science Park, Bybrook Road, Porton Down, Wiltshire, SP4 0BF

      IIF 2
  • Callister, Stephen John Paul
    British director born in January 1965

    Resident in England

    Registered addresses and corresponding companies

    • icon of address 154e, Milton Park, Abingdon, Oxfordshire, OX14 4SD, United Kingdom

      IIF 3

    • icon of address Porton Science Park, Bybrook Road, Porton Down, Wiltshire, SP4 0BF, England

      IIF 4

    • icon of address Porton Science Park, Ploughshare Innovations Ltd, Bybrook Road, Porton Down, Wiltshire, United Kingdom

      IIF 5
  • Callister, Stephen John Paul
    British managing director born in January 1965

    Resident in England

    Registered addresses and corresponding companies

    • icon of address 64 Fairfield Road, Fulflood, Winchester, Hampshire, SO22 6SG

      IIF 6
  • Callister, Stephen John Paul
    British none born in January 1965

    Resident in England

    Registered addresses and corresponding companies

    • icon of address 64 Fairfield Road, Fulflood, Winchester, Hampshire, SO22 6SG

      IIF 7
  • Callister, Stephen John Paul
    British chief operating officer born in January 1965

    Resident in United Kingdom

    Registered addresses and corresponding companies

    • icon of address Porton Science Park, Bybrook Road, Porton Down, Wiltshire, SP4 0BF, United Kingdom

      IIF 8 IIF 9
  • Callister, Stephen John Paul
    British managing director

    Registered addresses and corresponding companies

    • icon of address 64 Fairfield Road, Fulflood, Winchester, Hampshire, SO22 6SG

      IIF 10
child relation
Offspring entities and appointments
Active 1
Ceased 8
  • 1
    INTERCEDE 2263 LIMITED - 2008-03-04
    icon of address 154e Milton Park, Abingdon, Oxfordshire
    Active Corporate (6 parents)
    Equity (Company account)
    2,149,444 GBP2024-06-30
    Officer
    icon of calendar 2010-12-06 ~ 2020-08-28
    IIF 3 - Director → ME
  • 2
    SALT AVIATION RECOVERY ASSISTANCE LIMITED - 2018-09-05
    icon of address 8h Old Yard, Rectory Lane, Brasted, Kent, United Kingdom
    Active Corporate (4 parents)
    Equity (Company account)
    -445,947 GBP2023-12-30
    Officer
    icon of calendar 2020-04-22 ~ 2021-02-11
    IIF 4 - Director → ME
  • 3
    GLOBEFRAME LIMITED - 2009-04-30
    icon of address Bramble House Unit 1a, Furzehall Farm, 112 Wickham Road, Fareham, Hampshire, England
    Active Corporate (4 parents)
    Equity (Company account)
    1,118,937 GBP2024-06-30
    Officer
    icon of calendar 2009-08-14 ~ 2021-04-13
    IIF 5 - Director → ME
  • 4
    P2I LTD
    - now
    BROOMCO (3225) LIMITED - 2003-08-07
    PORTON PLASMA INNOVATIONS (P2I) LIMITED - 2006-03-03
    icon of address 126b Olympic Avenue, Milton, Abingdon, England
    Active Corporate (5 parents, 1 offspring)
    Officer
    icon of calendar 2008-10-23 ~ 2009-07-10
    IIF 7 - Director → ME
  • 5
    PLOUGHSHARE TECHNOLOGY LIMITED - 2003-02-07
    icon of address Porton Science Park, Bybrook Road, Porton Down, Wiltshire
    Active Corporate (8 parents, 1 offspring)
    Profit/Loss (Company account)
    341,788 GBP2023-04-01 ~ 2024-03-31
    Officer
    icon of calendar 2009-09-01 ~ 2021-02-13
    IIF 2 - Director → ME
  • 6
    SEPSIGHT DIAGNOSTICS LIMITED - 2020-03-12
    PRESYM DIAGNOSTICS LIMITED - 2019-08-01
    icon of address 1 Aire Street, Leeds, England
    Active Corporate (5 parents)
    Net Assets/Liabilities (Company account)
    -954,744 GBP2025-03-31
    Officer
    icon of calendar 2019-02-19 ~ 2020-06-22
    IIF 8 - Director → ME
  • 7
    icon of address Porton Science Park, Bybrook Road, Porton Down, Wiltshire, United Kingdom
    Active Corporate (4 parents)
    Equity (Company account)
    -1,133,895 GBP2024-12-31
    Officer
    icon of calendar 2019-08-19 ~ 2021-02-11
    IIF 9 - Director → ME
  • 8
    icon of address 30 Finsbury Square, London
    Dissolved Corporate (4 parents)
    Officer
    icon of calendar 2005-04-26 ~ 2007-03-30
    IIF 6 - Director → ME
    icon of calendar 2005-07-14 ~ 2007-03-30
    IIF 10 - Secretary → ME

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Contains public sector information retrieved at 12 November 2025 and licensed under the Open Government Licence v3.0.