- DECLAN BLOOM LTD- 15996423 - Incorporated on 3 October 2024 
- TRACY HALLORAN LTD- 11043886 - Incorporated on 2 November 2017 
- FEARON BROS LTD- NI052067 - Incorporated on 14 October 2004 
- O'HALLORAN CONSULTANCY LIMITED- 04588106 - Incorporated on 12 November 2002 
- O'HALLORAN ELECTRICAL LIMITEDActive - Proposal to Strike off- 09519030 - Incorporated on 31 March 2015 
- ALISON O'HALLORAN LIMITEDActive - Proposal to Strike off- 09496390 - Incorporated on 18 March 2015 
- O'HALLORAN SUPPLIES LIMITEDLiquidation- 09605187 - Incorporated on 22 May 2015 
- O'HALLORAN RESTAURANT LIMITED- 12098915 - Incorporated on 11 July 2019 
- DECLAN DENT LTD- 16094484 - Incorporated on 21 November 2024 
- DAHNE LIMITED- 16329444 - Incorporated on 19 March 2025 
- NICOLA OHALLORAN PROPERTY LTDDisolved- 12548516 - Dissolved on 18 June 2024 
- DR. DECLAN KEANEDissolved- NI615353 - Dissolved on 12 July 2019 
- J P HALLORAN LIMITEDActive - Proposal to Strike off- 05561961 - Incorporated on 13 September 2005 
- DECLANCOOPERENGINEERING LTDDisolved- SC787751 - Dissolved on 8 April 2025 
- DECLANJORDANSERVICES LTD- 15914893 - Incorporated on 23 August 2024 
- BRIAN O HALLORAN LTD- 15311823 - Incorporated on 27 November 2023 
- DELLCO GROUP LTD- SC622292 - Incorporated on 25 February 2019 
- DECLAN NG LIMITEDDisolved- 14226344 - Dissolved on 17 October 2023 
- O'HALLORAN TRUSTEES LIMITED- 01800096 - Incorporated on 14 March 1984 
- JASON O'HALLORAN LIMITED- 07181653 - Incorporated on 8 March 2010