- LJ O'BRIEN LTD- 08082294 - Incorporated on 24 May 2012 
- DF O'BRIEN LTD- 09262077 - Incorporated on 13 October 2014 
- JO O'BRIEN LTD- 08293977 - Incorporated on 14 November 2012 
- KL O'BRIEN LTDActive - Proposal to Strike off- 10268691 - Incorporated on 8 July 2016 
- S O'BRIEN & CO LTD- 10576858 - Incorporated on 23 January 2017 
- O'BRIEN'S (SW) LTD- 14817454 - Incorporated on 20 April 2023 
- DA O'BRIEN LTDDisolved- 12956298 - Dissolved on 1 August 2023 
- O'BRIENS FITNESS C.I.C.Active - Proposal to Strike off- 08633301 - Incorporated on 1 August 2013 
- NF O'BRIEN LTD- NI680541 - Incorporated on 5 July 2021 
- O'BRIEN HR LTD- SC802227 - Incorporated on 8 March 2024 
- DAVID OGILVIE-O'NEIL DESIGN LIMITED- SC321601 - Incorporated on 19 April 2007 
- 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 
- NEIL DAVIDGE PRODUCTIONS LIMITED- 04610621 - Incorporated on 6 December 2002 
- David BRIENT- Born March 1961 - Oakleigh 87 Norwich Road, Fakenham, Norfolk, United Kingdom, NR21 8HH 
- HAIR BEAUTY AT MR DAVID LIMITED- 07920342 - Incorporated on 23 January 2012 
- Jonathan William, Mr. O'BRIEN- Born May 1961 - The Bus Station Bransty Row, Whitehaven, England, CA28 7XE 
- DAVID MRAZ- 71-75 SHELTON STREET COVENT GARDEN, LONDON, UNITED KINGDOM, WC2H 9JQ 
- DAVID MRUK- Born January 1977 - BUTTERWORTHS ACCOUNTANTS & TAX ADVISERS 5 STATION, NEEDHAM MARKET, UNITED KINGDOM, IP6 8AS 
- David, Mr. HAM- Born May 1981 - Fourwinds Business Park Brookers Hill, Reading, Berkshire, United Kingdom, RG2 9BX