- O'SULLIVAN STUDIO LIMITEDDisolved- 13013109 - Dissolved on 23 January 2024 
- O'SULLIVAN LETTINGS LTDDisolved- 13537135 - Dissolved on 31 January 2023 
- O'SULLIVAN ART LTDDisolved- SC785388 - Dissolved on 11 March 2025 
- O'SULLIVAN HOLDINGS LTD- 16218574 - Incorporated on 30 January 2025 
- APRIL SHELLEY LTDActive - Proposal to Strike off- 07231765 - Incorporated on 22 April 2010 
- APRIL SUN LIMITEDDisolved- 04588161 - Dissolved on 24 January 2023 
- APRILON LIMITEDDisolved- 09374675 - Dissolved on 4 January 2022 
- APRILLO LIMITEDDissolved- 04737779 - Dissolved on 2 October 2012 
- APRILIX LIMITED- 11845856 - Incorporated on 25 February 2019 
- APRIL'S FORTUNE LTDDisolved- 12444491 - Dissolved on 23 April 2024 
- 4TH OF APRIL LIMITEDDisolved- 13241022 - Dissolved on 9 August 2022 
- B.M. SULLIVAN INC.- FC021959 - Incorporated on 6 July 1999 
- N & A O'SULLIVAN LTD- 04724855 - Incorporated on 7 April 2003 
- M O'SULLIVAN LTDLiquidation- 07620656 - Incorporated on 3 May 2011 
- S. SULLIVAN LTDActive - Proposal to Strike off- 07280693 - Incorporated on 10 June 2010 
- T SULLIVAN LTD- 11563390 - Incorporated on 11 September 2018 
- SULLIVAN J LTDActive - Proposal to Strike off- 11767090 - Incorporated on 15 January 2019 
- 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