- O'BRIEN LIMITED- 03126206 - Incorporated on 15 November 1995 
- EDWARD O'BRIENLiquidation- 00136509 - Incorporated on 18 June 1914 
- Richard Huw O'BRIEN- Born April 1969 - 43 Beechcroft Road, Newport, Gwent, NP19 8AG 
- HALL & O'BRIEN LTD- 15008520 - Incorporated on 17 July 2023 
- LANA T O'BRIEN LTD- 07290610 - Incorporated on 21 June 2010 
- DAVE O'BRIEN LTDActive - Proposal to Strike off- 09036748 - Incorporated on 13 May 2014 
- PAUL BRIEN 729 LTDActive - Proposal to Strike off- 10057222 - Incorporated on 11 March 2016 
- DR. CONOR O'BRIEN- NI605401 - Incorporated on 6 December 2010 
- O'BRIEN & KIRK LTD- 10862380 - Incorporated on 12 July 2017 
- MARK A O’BRIEN LTDActive - Proposal to Strike off- 11207149 - Incorporated on 15 February 2018 
- JACK BRIEN LTDDisolved- 12228047 - Dissolved on 5 March 2024 
- MR.MR. LTDDisolved- 14252327 - Dissolved on 5 December 2023 
- AEDIFICIA CONSTRUCTION LTDDissolved- 04432043 - Dissolved on 21 September 2010 
- O'BRIEN WHEELER LIMITEDActive - Proposal to Strike off- 09692586 - Incorporated on 20 July 2015 
- VERMILION MANAGEMENT LTDDissolved- 09933044 - Dissolved on 28 May 2019 
- T.M. O'BRIEN LIMITED- 06507030 - Incorporated on 18 February 2008 
- MR MR2 LTD- 11218539 - Incorporated on 21 February 2018 
- Richard, Mr. EYRE- Born December 1949 - Trusley Old Hall Sutton-On-The-Hill Ashbourne Trusley Old Hall, Sutton On The Hill, Ashbourne, Derbshire, England, DE6 5JG 
- MR RICHARD COOK- SOVEREIGN HOUSE 12 WARWICK STREET, EARSLDON, COVENTRY, WEST MIDLANDS, UNITED KINGDOM, CV5 6ET 
- Richard, Mr. GORT- Born August 1991 - 01 Meadlake Place Thorpe Lea Road, Egham, Surrey, England, TW20 8HE