- GALLAGHER PLUMBING LIMITEDActive - Proposal to Strike off- 12095576 - Incorporated on 10 July 2019 
- GALLAGHER SOFTWARES LTDDisolved- NI678596 - Dissolved on 20 September 2022 
- LEE GALLAGHER LIMITED- 13398058 - Incorporated on 14 May 2021 
- GALLAGHER RE LIMITEDDisolved- 13895479 - Dissolved on 9 July 2024 
- AMANDA GALLAGHER LTDDisolved- 14243761 - Dissolved on 26 December 2023 
- CLAIRE GALLAGHER LTD- 14322235 - Incorporated on 29 August 2022 
- GALLAGHER CONSULTING LTD- 14353229 - Incorporated on 13 September 2022 
- GALLAGHER PROJECTS LIMITED- 16107490 - Incorporated on 28 November 2024 
- GALLAGHER CARPETS LTD.- SC307299 - Incorporated on 22 August 2006 
- BIGGINS & GALLAGHER LIMITED- 02302201 - Incorporated on 4 October 1988 
- TOM GALLAGHER LIMITED- 02641998 - Incorporated on 30 August 1991 
- POULTNEY GALLAGHER LIMITEDDissolved- 02888619 - Dissolved on 21 February 2012 
- GALLAGHER SECURITIES LIMITED- 02908053 - Incorporated on 14 March 1994 
- MARK GALLAGHER LIMITEDDisolved- SC271517 - Dissolved on 1 November 2022 
- GALLAGHER MARQUEES LTDDissolved- 07243900 - Dissolved on 22 April 2014 
- GALLAGHER TRADING LIMITEDActive - Proposal to Strike off- 08089815 - Incorporated on 30 May 2012 
- GALLAGHER FLOORING LTDDisolved- 04204041 - Dissolved on 30 March 2025 
- GALLAGHER DAVIES LIMITEDDissolved- 04989141 - Dissolved on 5 May 2015 
- WILSON GALLAGHER LTD- 05125700 - Incorporated on 12 May 2004 
- WACHTER-GALLAGHER LIMITEDActive - Proposal to Strike off- 07497743 - Incorporated on 19 January 2011