- IRWIN SCOTT LIMITEDDisolved- 06772696 - Dissolved on 20 February 2024 
- IRWIN GROUP LIMITED- 12194321 - Incorporated on 6 September 2019 
- IRWIN HOMES LIMITED- 11988431 - Incorporated on 10 May 2019 
- MR & MRS S LTDActive - Proposal to Strike off- 12290244 - Incorporated on 30 October 2019 
- IRWIN WRIGHT LIMITEDLiquidation- 05621208 - Incorporated on 14 November 2005 
- IRWIN ENTERPRISES LTDLiquidation- NI055389 - Incorporated on 2 June 2005 
- IRWIN INSTRUMENTATION LIMITEDActive - Proposal to Strike off- 08218036 - Incorporated on 18 September 2012 
- IRWIN LOGISTICS LIMITEDActive - Proposal to Strike off- SC596696 - Incorporated on 9 May 2018 
- IRWIN WESTEN LIMITEDDisolved- 09724651 - Dissolved on 19 April 2022 
- IRWIN NETWORKS LIMITED- 09432302 - Incorporated on 10 February 2015 
- IRWIN CONTRACTS LIMITEDActive - Proposal to Strike off- 09622507 - Incorporated on 3 June 2015 
- IRWIN PROPERTY LIMITED- 10369545 - Incorporated on 11 September 2016 
- IRWIN INDUSTRIES LTD- 14679641 - Incorporated on 21 February 2023 
- IRWIN STROUD LIMITEDDisolved- 15505156 - Dissolved on 22 July 2025 
- ALBERT COLLEGE LIMITEDDissolved- 05595604 - Dissolved on 8 April 2014 
- R.A. IRWIN & COMPANY LIMITED- NI013665 - Incorporated on 13 June 1979 
- OCDNADLEIF42 LTD- 08786727 - Incorporated on 22 November 2013 
- KEVIN&CO LTDActive - Proposal to Strike off- 11308034 - Incorporated on 13 April 2018 
- ST KEVIN`S LTD- 06696145 - Incorporated on 12 September 2008 
- KEVIN EN LTDActive - Proposal to Strike off- 09567335 - Incorporated on 29 April 2015