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- NF O'BRIEN LTD- NI680541 - Incorporated on 5 July 2021 
- O'BRIEN HR LTD- SC802227 - Incorporated on 8 March 2024 
- O'BRIEN S &CO LTDActive - Proposal to Strike off- 10281627 - Incorporated on 15 July 2016 
- O’BRIEN PM LTD- 15405176 - Incorporated on 11 January 2024 
- WP KAREN PIRIE LIMITED- 12116627 - Incorporated on 23 July 2019 
- A K PIRIE ENGINEERING LTDActive - Proposal to Strike off- SC436363 - Incorporated on 7 November 2012 
- RONALDO & SON LTD- 09170663 - Incorporated on 11 August 2014 
- NEIL RONALDSON BUILDING CONTRACTORS LIMITED- 08270570 - Incorporated on 26 October 2012 
- RONALD CORP LTD- 11934923 - Incorporated on 9 April 2019 
- RONALD CARS LTDDisolved- 14368998 - Dissolved on 27 February 2024 
- RONALDO’S LDT LTD- 16593483 - Incorporated on 19 July 2025 
- D S RONALD LIMITED- 04779135 - Incorporated on 28 May 2003 
- RONALDJAMESDIGITAL LTDActive - Proposal to Strike off- 09405818 - Incorporated on 26 January 2015 
- RONALDMILI LTD- 15942339 - Incorporated on 7 September 2024 
- AARON PIRIE SERVICES LTDDisolved- SC699964 - Dissolved on 1 November 2022 
- S.C.RONALDO.COM LTDDisolved- 14124433 - Dissolved on 24 October 2023 
- P & M RONALDSON LTDDisolved- SC472445 - Dissolved on 7 March 2023 
- RONALD WICK LTDDisolved- 14292738 - Dissolved on 16 January 2024 
- NIC O'BRIEN LTDDisolved- 14427080 - Dissolved on 26 March 2024