- N.L SULLIVAN LTDDisolved- 13131112 - Dissolved on 6 June 2023 
- S SULLIVAN LTDDisolved- 12925084 - Dissolved on 8 March 2022 
- C O'SULLIVAN LTD- 13210953 - Incorporated on 18 February 2021 
- MR&MRS B'S LTDDissolved- 10677155 - Dissolved on 20 August 2019 
- MR&MRS LTDActive - Proposal to Strike off- 12389034 - Incorporated on 7 January 2020 
- SULLIVAN DOT NET LTD- 07645697 - Incorporated on 24 May 2011 
- DLP DERIVATIVES LLPActive - Proposal to Strike off- OC354152 - Incorporated on 15 April 2010 
- O'SULLIVAN PHILLIPS LTD- 12841491 - Incorporated on 27 August 2020 
- O'SULLIVAN OPTICIANS LIMITEDLiquidation- 03825445 - Incorporated on 13 August 1999 
- O'SULLIVAN ANTIQUES LTDDisolved- 04887250 - Dissolved on 11 January 2022 
- THINK - O'SULLIVAN LTD- 05340524 - Incorporated on 24 January 2005 
- O'SULLIVAN SOLUTIONS LIMITEDDissolved- 05773097 - Dissolved on 22 March 2011 
- O'SULLIVAN INVESTMENTS LIMITED- 07782861 - Incorporated on 22 September 2011 
- VICTORIA O'SULLIVAN LIMITEDDisolved- 07852794 - Dissolved on 15 October 2024 
- O'SULLIVAN INSTALLATIONS LIMITED- 06794349 - Incorporated on 19 January 2009 
- O'SULLIVAN & GRAHAM LIMITEDActive - Proposal to Strike off- 01753335 - Incorporated on 15 September 1983 
- O'SULLIVAN CEILINGS LIMITEDDisolved- 04671869 - Dissolved on 9 July 2024 
- O'SULLIVAN FARMS LIMITED- 03328434 - Incorporated on 5 March 1997 
- O'SULLIVAN ENGINEERING LTDActive - Proposal to Strike off- 08739278 - Incorporated on 18 October 2013 
- RICHARD O'SULLIVAN LTD- 09355786 - Incorporated on 15 December 2014