- Gallagher Re Foundation- CE007373 
- DERMOT GALLAGHER LTDActive - Proposal to Strike off- 11872145 - Incorporated on 9 March 2019 
- GALLAGHER PLANNING LIMITED- 10275731 - Incorporated on 13 July 2016 
- CAMERON GALLAGHER LIMITEDActive - Proposal to Strike off- 10476419 - Incorporated on 14 November 2016 
- BOBBY GALLAGHER LTDActive - Proposal to Strike off- SC602721 - Incorporated on 17 July 2018 
- GALLAGHER BSH LIMITED- 11677288 - Incorporated on 14 November 2018 
- GALLAGHER TRAFFIC LTDDisolved- 12541674 - Dissolved on 6 September 2022 
- GALLAGHER TRADING LTD- NI669506 - Incorporated on 18 May 2020 
- GALLAGHER LIVESTOCK LTD- NI687226 - Incorporated on 5 April 2022 
- GALLAGHER INTERNATIONAL LTDDisolved- 14029732 - Dissolved on 28 May 2024 
- GALLAGHER BRICKWORK LIMITED- SC742228 - Incorporated on 23 August 2022 
- GRAHAM GALLAGHER LIMITEDDisolved- 14579959 - Dissolved on 16 April 2024 
- PILSWORTH GALLAGHER LIMITED- 13655063 - Incorporated on 30 September 2021 
- GALLAGHER RENTALS LTD- 14746447 - Incorporated on 21 March 2023 
- GALLAGHER ROOFING LIMITEDDisolved- 13168177 - Dissolved on 3 December 2024 
- GALLAGHER CARE LIMITEDDisolved- 13009773 - Dissolved on 26 April 2022 
- P & S GALLAGHER LIMITED- 02671037 - Incorporated on 13 December 1991 
- L M GALLAGHER LIMITEDDissolved- 06570086 - Dissolved on 23 August 2011 
- L & C GALLAGHER LIMITED- 09539828 - Incorporated on 13 April 2015 
- A M GALLAGHER LIMITED- 08793117 - Incorporated on 27 November 2013