- GALLAGHER HSS LIMITEDDisolved- 13450793 - Dissolved on 16 November 2021 
- HANNAH GALLAGHER LTD- 12092186 - Incorporated on 8 July 2019 
- ADRIAN GALLAGHER LTD- NI663572 - Incorporated on 7 August 2019 
- DEREK GALLAGHER LIMITEDDisolved- 09699219 - Dissolved on 30 January 2024 
- MICHAEL GALLAGHER LTDActive - Proposal to Strike off- 09774807 - Incorporated on 14 September 2015 
- GALLAGHER ELECTRICS LTD- 11902277 - Incorporated on 23 March 2019 
- GALLAGHER EVENTS LIMITED- 11991792 - Incorporated on 13 May 2019 
- GALLAGHER TRAINING LTD- 09544756 - Incorporated on 15 April 2015 
- J GALLAGHER LIMITED- 10338870 - Incorporated on 19 August 2016 
- GALLAGHER BRICKWORK LIMITEDActive - Proposal to Strike off- NI641269 - Incorporated on 5 October 2016 
- GALLAGHER GRACE LIMITEDActive - Proposal to Strike off- 10506690 - Incorporated on 1 December 2016 
- MOJO GALLAGHER LIMITEDDisolved- 10722039 - Dissolved on 31 December 2024 
- GALLAGHER RETAIL LTDDisolved- 11325025 - Dissolved on 5 September 2024 
- GALLAGHER ELECTRICAL LTD- 12464614 - Incorporated on 14 February 2020 
- BURTON&GALLAGHER LTDDisolved- 14082444 - Dissolved on 10 October 2023 
- GALLAGHER PHARMA LIMITED- SC763100 - Incorporated on 21 March 2023 
- GALLAGHER CARS LIMITED- NI691428 - Incorporated on 27 September 2022 
- JEENE GALLAGHER LIMITEDDisolved- 14423320 - Dissolved on 19 March 2024 
- GERARD GALLAGHER LTD- 15516110 - Incorporated on 23 February 2024 
- GALLAGHER CONSULTANCY LTD- 15620272 - Incorporated on 6 April 2024