- Richard, Mr. VRBA- Born August 1995 - 1420 Prokopa Velikého, Tachov, Czech Republic, 34701 
- MR & MR LTD- 16489396 - Incorporated on 2 June 2025 
- WITT O'BRIEN'S LTD- 02261971 - Incorporated on 25 May 1988 
- TONY BRIEN LTDDissolved- 08208605 - Dissolved on 6 May 2014 
- O'BRIEN RAIL LTD.Active - Proposal to Strike off- 08600277 - Incorporated on 8 July 2013 
- DR DONAL O'BRIEN- NI625707 - Incorporated on 16 July 2014 
- BEAR O'BRIEN'S LTDDisolved- 13358094 - Dissolved on 27 September 2022 
- MIKE O'BRIEN LTDDisolved- 10954957 - Dissolved on 26 September 2023 
- HERO O'BRIEN LTDActive - Proposal to Strike off- 11025732 - Incorporated on 23 October 2017 
- MR LEE RICHARD ROSS WILLIAMS LIMITED- 14467580 - Incorporated on 7 November 2022 
- MR MR LTDActive - Proposal to Strike off- 15533685 - Incorporated on 1 March 2024 
- MR RICHARD DAVID TONY JACKSON LIMITEDDisolved- 14605452 - Dissolved on 25 June 2024 
- BAKER & O'BRIEN (UK) LIMITED- 06662181 - Incorporated on 1 August 2008 
- MR&MRS B'S LTDDissolved- 10677155 - Dissolved on 20 August 2019 
- MR&MRS LTDActive - Proposal to Strike off- 12389034 - Incorporated on 7 January 2020 
- Alan Richard O'BRIEN- Born March 1978 - 1 More London Place, London, England, SE1 2AF 
- Richard Alec O'BRIEN- Born April 1988 - 9 Silver Road, Norwich, England, NR3 4TB 
- MARK RICHARD O'BRIEN- Born August 1967 - 5 HERON SHAW, CRANLEIGH, SURREY, GU6 8BT 
- RICHARD JOHN O'BRIEN- Born July 1969 - 79 TIB STREET, MANCHESTER, LANCASHIRE, UNITED KINGDOM, M4 1LS 
- O'BRIEN RECYCLING LTD- SC387199 - Incorporated on 18 October 2010