- T.O’BRIEN LTDDisolved- 14890190 - Dissolved on 3 September 2024 
- A O'BRIEN 8175 LTDActive - Proposal to Strike off- 10714356 - Incorporated on 7 April 2017 
- T O'BRIEN LTDDisolved- 06099508 - Dissolved on 7 December 2021 
- C.E O'BRIEN LTDDisolved- 12136245 - Dissolved on 11 January 2022 
- A C O'BRIEN LTDDisolved- 08868649 - Dissolved on 8 July 2025 
- M & R O'BRIEN LTDActive - Proposal to Strike off- 08552398 - Incorporated on 31 May 2013 
- A O'BRIEN LTDDisolved- 09424295 - Dissolved on 9 May 2023 
- O'BRIEN.C LTD- 11885758 - Incorporated on 15 March 2019 
- THE FORMWORK COMPANY LIMITED- 06818552 - Incorporated on 13 February 2009 
- BRIEN LTDDisolved- 08582463 - Dissolved on 8 August 2023 
- Stephen O BRIEN- 46 Wallcroft, Willaston, Neston, United Kingdom, CH64 2UF 
- RONALD MICHAEL WILLIAM GRUNDY LTD- 15927863 - Incorporated on 31 August 2024 
- K&A O'BRIEN LTD- 03816457 - Incorporated on 26 July 1999 
- A & S O'BRIEN LTDActive - Proposal to Strike off- SC451340 - Incorporated on 31 May 2013 
- D M O'BRIEN LTD- 12118376 - Incorporated on 23 July 2019 
- C O'BRIEN LTDActive - Proposal to Strike off- 09910506 - Incorporated on 10 December 2015 
- K & J O'BRIEN LTDDisolved- 14994563 - Dissolved on 17 December 2024 
- PIRIE & HUNTER LIMITED- SC428946 - Incorporated on 24 July 2012 
- KAY PIRIE- 13 AUCHMORE ROAD, ELLON, ABERDEENSHIRE, AB41 9QG 
- IAN PIRIE- Born May 1958 - LENDRUM, TURRIFF, ABERDEENSHIRE, UNITED KINGDOM, AB53 8HA