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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company 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
Active 3
  • 1
    O'brien, Gareth Owain
    Born in January 1979
    Individual (1 offspring)
    Officer
    2005-03-08 ~ now
    OF - Director → CIF 0
    Mr Gareth Owain O'brien
    Born in January 1979
    Individual (1 offspring)
    Person with significant control
    2016-11-04 ~ now
    PE - Ownership of shares – 75% or moreCIF 0
  • 2
    O'brien, Rhian
    Born in January 1980
    Individual (1 offspring)
    Officer
    2016-11-17 ~ now
    OF - Director → CIF 0
  • 3
    O'brien, Rhian Elizabeth
    Individual (1 offspring)
    Officer
    2004-11-04 ~ now
    OF - Secretary → CIF 0
Ceased 3
  • 1
    Obrien, Derek Vincent
    Company Director born in April 1948
    Individual (2 offsprings)
    Officer
    2004-11-04 ~ 2014-07-25
    OF - Director → CIF 0
  • 2
    Marquess Court, 69 Southampton Row, London
    Active Corporate (3 parents, 6 offsprings)
    Equity (Company account)
    2 GBP2024-01-31
    Officer
    2004-11-04 ~ 2004-11-04
    PE - Nominee Director → CIF 0
  • 3
    Marquess Court, 69 Southampton Row, London
    Active Corporate (2 parents, 187 offsprings)
    Equity (Company account)
    2 GBP2024-01-31
    Officer
    2004-11-04 ~ 2004-11-04
    PE - Nominee Secretary → CIF 0
parent relation
Company in focus

O'BRIEN SECURITY SYSTEMS LIMITED

Standard Industrial Classification
43290 - Other Construction Installation
Brief company account
Average Number of Employees
52024-01-01 ~ 2024-12-31
52023-01-01 ~ 2023-12-31
Fixed Assets
9,601 GBP2024-12-31
12,001 GBP2023-12-31
Current Assets
9,998 GBP2024-12-31
32,887 GBP2023-12-31
Creditors
Amounts falling due within one year
-10,678 GBP2024-12-31
-35,753 GBP2023-12-31
Net Current Assets/Liabilities
-361 GBP2024-12-31
-398 GBP2023-12-31
Total Assets Less Current Liabilities
9,240 GBP2024-12-31
11,603 GBP2023-12-31
Net Assets/Liabilities
7,950 GBP2024-12-31
9,741 GBP2023-12-31
Equity
7,950 GBP2024-12-31
9,741 GBP2023-12-31

  • O'BRIEN SECURITY SYSTEMS LIMITED
    Info
    Registered number 05278266
    84 Gower Road, Sketty, Swansea SA2 9BZ
    PRIVATE LIMITED COMPANY incorporated on 2004-11-04 (21 years 3 months). The company status is Active.
    The last date of confirmation statement was made at 2024-11-17
    CIF 0
child relation
Offspring entities and appointments
Active 0
  • Not found in our database.

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