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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

Callan, John, Professor

    Related profiles found in government register
  • Callan, John, Professor
    British born in March 1973

    Resident in Northern Ireland

    Registered addresses and corresponding companies
    • 5, Rathlin Court, Ballycastle, BT54 6AZ, Northern Ireland

      IIF 1
    • C/o Cleaver Fulton Rankin, 50 Bedford Street, Belfast, BT2 7FW, United Kingdom

      IIF 2
    • Victoria House, 15-17 Gloucester Street, Belfast, BT1 4LS

      IIF 3
  • Callan, John, Professor
    British university professor born in March 1973

    Resident in Northern Ireland

    Registered addresses and corresponding companies
    • Victoria House, 15-17 Gloucester Street, Belfast, County Antrim, BT1 4LS, United Kingdom

      IIF 4
    • Victoria House, Gloucester Street, Belfast, BT1 4LS, Northern Ireland

      IIF 5
    • 253, Gray's Inn Road, London, WC1X 8QT, United Kingdom

      IIF 6
  • Professor John Callan
    British born in March 1973

    Resident in Northern Ireland

    Registered addresses and corresponding companies
    • 5, Rathlin Court, Ballycastle, BT54 6AZ, Northern Ireland

      IIF 7
    • Victoria House, 15-17 Gloucester Street, Belfast, BT1 4LS

      IIF 8
    • Victoria House, Gloucester Street, Belfast, BT1 4LS, Northern Ireland

      IIF 9
    • 253, Gray's Inn Road, London, WC1X 8QT, United Kingdom

      IIF 10
child relation
Offspring entities and appointments 6
  • 1
    CALO SCIENTIFIC LTD
    NI727929
    1 Galvally Avenue, Portstewart, Northern Ireland
    Active Corporate (2 parents)
    Officer
    2025-03-28 ~ now
    IIF 1 - Director → ME
    Person with significant control
    2025-03-28 ~ now
    IIF 7 - Right to appoint or remove directors OE
    IIF 7 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 7 - Ownership of shares – More than 25% but not more than 50% OE
  • 2
    CAUSEWAY CHEMICALS LTD
    NI691815
    Victoria House, 15-17 Gloucester Street, Belfast, County Antrim, United Kingdom
    Active Corporate (4 parents)
    Officer
    2023-02-01 ~ 2025-08-31
    IIF 4 - Director → ME
  • 3
    KLAS THERAPEUTICS LIMITED
    NI676570
    C/o Cleaver Fulton Rankin, 50 Bedford Street, Belfast, United Kingdom
    Active Corporate (5 parents)
    Officer
    2021-02-16 ~ now
    IIF 2 - Director → ME
  • 4
    SONOTARG HOLDINGS LIMITED
    13952782
    253 Gray's Inn Road, London, United Kingdom
    Active Corporate (4 parents)
    Officer
    2022-03-03 ~ 2025-08-31
    IIF 6 - Director → ME
    Person with significant control
    2022-03-03 ~ 2025-08-31
    IIF 10 - Right to appoint or remove directors OE
    IIF 10 - Ownership of voting rights - 75% or more OE
    IIF 10 - Ownership of shares – 75% or more OE
  • 5
    SONOTARG LIMITED
    NI656568
    Victoria House, 15-17 Gloucester Street, Belfast
    Active Corporate (9 parents, 2 offsprings)
    Officer
    2018-10-23 ~ 2025-08-31
    IIF 3 - Director → ME
    Person with significant control
    2018-10-23 ~ now
    IIF 8 - Ownership of shares – More than 25% but not more than 50% OE
  • 6
    STIMOXYGEN LTD
    NI677236
    C/o A&l Goodbody Northern Ireland Llp, 42-46 Fountain Street, Belfast, Northern Ireland
    Active Corporate (7 parents)
    Officer
    2021-03-09 ~ 2023-04-26
    IIF 5 - Director → ME
    Person with significant control
    2021-03-09 ~ 2025-01-15
    IIF 9 - Ownership of shares – More than 25% but not more than 50% OE

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.