- DR A O'NEILL LTD- NI689385 - Incorporated on 30 June 2022 
- NEIL & SON LTD- SC835870 - Incorporated on 30 January 2025 
- GARDEN MACHINERY LIMITED- 05990286 - Incorporated on 7 November 2006 
- TPI PACKAGING AND INDUSTRIALDisolved- 01852827 - Dissolved on 8 March 2022 
- NEIL DEE LTDDissolved- 07035235 - Dissolved on 22 February 2011 
- UM O'NEILL LTDActive - Proposal to Strike off- NI652254 - Incorporated on 10 April 2018 
- ASK NEIL LTD- 10454499 - Incorporated on 1 November 2016 
- JAGCH NEIL- SC746245 - Incorporated on 4 October 2022 
- NEIL R KELLYDisolved- SC774335 - Dissolved on 9 April 2024 
- O'NEILL GMBHregistered- OE029628 - Incorporated on 5 May 2023 
- AC NEILL LTDDissolved- 07084039 - Dissolved on 18 September 2012 
- O'NEILL GMBH- FC029564 - Incorporated on 1 July 2009 
- PJ O'NEILL LTD- NI060697 - Incorporated on 30 August 2006 
- NEIL PVT LTDDisolved- 12966191 - Dissolved on 21 February 2023 
- NEIL MRU LTD- 14118007 - Incorporated on 19 May 2022 
- SAPPHIRE HEALTHCARE UK LTD- 04687221 - Incorporated on 5 March 2003 
- LEGALLY SUITED LTDDisolved- 09556147 - Dissolved on 19 December 2023 
- HUGH O'NEILL- LP005883 - Incorporated on 25 August 1998 
- NEIL MAC LTD- SC310670 - Incorporated on 19 October 2006 
- RJ O'NEILL LTDDissolved- 06199861 - Dissolved on 28 September 2010