- E SULLIVAN LTDActive - Proposal to Strike off- 10357551 - Incorporated on 2 September 2016 
- O'SULLIVAN U.K. LTD- 13059843 - Incorporated on 3 December 2020 
- VERTU MOTORS (DURHAM) LIMITED- 02747080 - Incorporated on 14 September 1992 
- MR MR LTDActive - Proposal to Strike off- 15533685 - Incorporated on 1 March 2024 
- K.D & M..A SULLIVAN LLP- OC422550 - Incorporated on 22 May 2018 
- F SULLIVAN LTD- 07590649 - Incorporated on 4 April 2011 
- S.T. SULLIVAN LTDDisolved- 07850167 - Dissolved on 21 June 2022 
- D & S SULLIVAN LTDLiquidation- 08672824 - Incorporated on 2 September 2013 
- P T & C E SULLIVAN LTD- 16262924 - Incorporated on 19 February 2025 
- N A O'SULLIVAN LTD- 10678722 - Incorporated on 20 March 2017 
- W SULLIVAN LTD- 09087294 - Incorporated on 16 June 2014 
- D W SULLIVAN LTDActive - Proposal to Strike off- 09071272 - Incorporated on 4 June 2014 
- P J SULLIVAN LTDDisolved- 10760861 - Dissolved on 2 August 2022 
- R J SULLIVAN LTD- 10029669 - Incorporated on 26 February 2016 
- MICHAEL O'SULLIVAN LIMITEDDissolved- 06749173 - Dissolved on 28 June 2011 
- O'SULLIVAN CONSTRUCTION LIMITED- 02085240 - Incorporated on 18 December 1986 
- O'SULLIVAN & CO LIMITEDActive - Proposal to Strike off- 04363436 - Incorporated on 30 January 2002 
- O'SULLIVAN RETAIL LIMITEDActive - Proposal to Strike off- 06235361 - Incorporated on 2 May 2007 
- O'SULLIVAN FACILITIES LIMITED- 06667922 - Incorporated on 8 August 2008 
- O'SULLIVAN DEVELOPMENTS LTDDisolved- 04151666 - Dissolved on 17 June 2025