- CALLAN CONSTRUCTION LIMITED- NI056976 - Incorporated on 25 October 2005 
- CALLAN BROOK LIMITEDDisolved- 06443017 - Dissolved on 5 October 2021 
- CALLAN PROPERTIES LIMITED- 05444346 - Incorporated on 5 May 2005 
- CLARE CALLAN LIMITED- 07434894 - Incorporated on 10 November 2010 
- CALLAN INSULATION LIMITED- NI610366 - Incorporated on 13 December 2011 
- CALLAN PUBLISHING LIMITED- 08241245 - Incorporated on 5 October 2012 
- JESSICA CALLAN LIMITEDActive - Proposal to Strike off- 07618245 - Incorporated on 28 April 2011 
- CALLAN RENEWABLES LTD- NI625551 - Incorporated on 7 July 2014 
- PAUL CALLAN LIMITEDActive - Proposal to Strike off- 11258238 - Incorporated on 15 March 2018 
- CALLAN INVESTMENTS LIMITEDActive - Proposal to Strike off- 09733096 - Incorporated on 14 August 2015 
- CALLAN COMPLETIONS LIMITEDDisolved- 10018219 - Dissolved on 10 April 2022 
- CALLAN LOGISTICS LTD- 10574082 - Incorporated on 20 January 2017 
- CALLAN CANDLES LTDLiquidation- SC662216 - Incorporated on 26 May 2020 
- CALLAN BRICKWORK LTD- NI673943 - Incorporated on 3 November 2020 
- CALLAN HAWKINS LIMITEDActive - Proposal to Strike off- 15062194 - Incorporated on 10 August 2023 
- CALLAN CREATIVE LTD- 15748829 - Incorporated on 29 May 2024 
- CHARLES CALLAN LTD- 16195040 - Incorporated on 20 January 2025 
- MR.MR. LTDDisolved- 14252327 - Dissolved on 5 December 2023 
- MR MR2 LTD- 11218539 - Incorporated on 21 February 2018 
- PFK CALLANDER LTD- SC570080 - Incorporated on 30 June 2017