- THE MR AND MRS EMPIRE LTD- 15603811 - Incorporated on 29 March 2024 
- O'BRIENS LIMITEDActive - Proposal to Strike off- 03712395 - Incorporated on 11 February 1999 
- O'BRIEN & CO LIMITED- 07475894 - Incorporated on 22 December 2010 
- SALLY O'BRIENS LTD- NI052057 - Incorporated on 14 October 2004 
- DANIEL R O'BRIEN O0060 LTDDisolved- 04846894 - Dissolved on 26 November 2024 
- DERMOT O'BRIEN LTD.Active - Proposal to Strike off- 08376073 - Incorporated on 25 January 2013 
- GERALD O'BRIEN LTDActive - Proposal to Strike off- 11295659 - Incorporated on 6 April 2018 
- PHILIP O'BRIEN LTDActive - Proposal to Strike off- 10105579 - Incorporated on 6 April 2016 
- O'BRIEN METALS LTD- 10652592 - Incorporated on 4 March 2017 
- MR & MRS NIK LTD- 09626652 - Incorporated on 6 June 2015 
- MR AND MRS A LTDActive - Proposal to Strike off- 11538245 - Incorporated on 28 August 2018 
- J O'BRIEN & CO LIMITEDDissolved- 07460389 - Dissolved on 27 August 2019 
- JOANNE O'BRIEN LTDDisolved- 07940241 - Dissolved on 17 September 2024 
- TAYLOR O'BRIEN LTD- 05988291 - Incorporated on 3 November 2006 
- G.F. O'BRIEN (NI) LIMITED- NI068324 - Incorporated on 3 March 2008 
- BRIENZ 24 LIMITEDDisolved- 11747462 - Dissolved on 17 June 2025 
- NICOLE O'BRIEN LTD- 12577616 - Incorporated on 29 April 2020 
- DAMIAN O'BRIEN LTDActive - Proposal to Strike off- 11234179 - Incorporated on 5 March 2018 
- BRIENFIELD LTDDisolved- 13643869 - Dissolved on 18 July 2023 
- MR & MRS VAN LTD- 14374749 - Incorporated on 25 September 2022