- O'NEILLS BARS 2025 LTD- NI727887 - Incorporated on 27 March 2025 
- MOYNA O'NEILL LTD- 11435165 - Incorporated on 27 June 2018 
- A. G. O'NEILL LIMITED- NI017946 - Incorporated on 13 November 1984 
- KELLY & O'NEILL LTD- NI603399 - Incorporated on 8 June 2010 
- R.M. O'NEILL LIMITED- SC393078 - Incorporated on 8 February 2011 
- M T O'NEILL LIMITEDDisolved- 04766601 - Dissolved on 15 August 2023 
- SHANE O'NEILL LTD- NI045925 - Incorporated on 25 March 2003 
- R & C O'NEILL LIMITED- 09718580 - Incorporated on 5 August 2015 
- NEILL MEDIA LTD- 16305126 - Incorporated on 10 March 2025 
- O’NEILL 4X4 LIMITED- 16326281 - Incorporated on 19 March 2025 
- R. & M. NEILL LIMITEDActive - Proposal to Strike off- 03461603 - Incorporated on 6 November 1997 
- RALPH J O'NEILL LTDActive - Proposal to Strike off- 08087525 - Incorporated on 29 May 2012 
- NEILL ROZARIOActive - Proposal to Strike off- 07788714 - Incorporated on 27 September 2011 
- J & P O'NEILL LIMITED- NI040009 - Incorporated on 19 January 2001 
- NEILL'S LIMITED- 08063998 - Incorporated on 10 May 2012 
- TERRY O'NEILL LTDDissolved- 04056826 - Dissolved on 20 August 2013 
- O'NEILL M&C LIMITED- 08473284 - Incorporated on 4 April 2013 
- R W NEILL LIMITEDActive - Proposal to Strike off- NI058119 - Incorporated on 10 February 2006 
- NEILL FOLEY LTD- 10955115 - Incorporated on 11 September 2017 
- NEILL TOOLS LIMITED- 00609353 - Incorporated on 8 August 1958