- HARRIS IRWIN ASSOCIATES LIMITED- 05332633 - Incorporated on 14 January 2005 
- W.D. IRWIN AND SONS (1985) LIMITEDActive - Proposal to Strike off- NI007236 - Incorporated on 5 April 1968 
- J & D IRWIN PLASTERING LTDActive - Proposal to Strike off- 04490783 - Incorporated on 19 July 2002 
- R IRWIN CONSULTANCY LTDDisolved- 12139550 - Dissolved on 25 July 2023 
- R.A. IRWIN (HOLDINGS) LIMITED- NI005704 - Incorporated on 23 September 1963 
- ROOK IRWIN SWEENEY LLP- OC429240 - Incorporated on 12 October 2019 
- M GRAHAM-IRWIN LIMITEDActive - Proposal to Strike off- 11749380 - Incorporated on 4 January 2019 
- IRWINSARAH LIMITEDDisolved- 13663032 - Dissolved on 8 August 2023 
- A. IRWIN ACCOUNTANCY LTD- SC765200 - Incorporated on 6 April 2023 
- MATTHEW D IRWIN LIMITEDActive - Proposal to Strike off- 08779355 - Incorporated on 18 November 2013 
- IRWIN AND JONES LIMITEDDisolved- 14670781 - Dissolved on 23 July 2024 
- MARTYN GRAHAM-IRWIN LTDDisolved- 15393306 - Dissolved on 10 June 2025 
- JACQUELINE VICTORIA JAMES DEVELOPMENTS LIMITED- 05763396 - Incorporated on 30 March 2006 
- CHILDTIME LIMITEDActive - Proposal to Strike off- 11674004 - Incorporated on 13 November 2018 
- JACQUELINE NICOLA DYER LIMITED- 15851061 - Incorporated on 22 July 2024 
- LEE & LEE LIMITEDActive - Proposal to Strike off- SC465635 - Incorporated on 11 December 2013 
- J.H. IRWIN & SON (FUELS) LIMITED- NI015080 - Incorporated on 10 August 1981 
- IRWIN FARM SUPPLIES LTD- NI045444 - Incorporated on 14 February 2003 
- WALLS AND IRWIN LIMITED- 08990896 - Incorporated on 10 April 2014 
- JACQUELINE ARNOLD 510 LTDActive - Proposal to Strike off- 10021551 - Incorporated on 23 February 2016