- GALLAGHER RUSH LTD- 13894376 - Incorporated on 4 February 2022 
- SMRT GALLAGHER LTD- NI730128 - Incorporated on 4 June 2025 
- ASK MIKE LTD- 05979310 - Incorporated on 26 October 2006 
- MIKESZ LTD- 07321202 - Incorporated on 21 July 2010 
- MIKE ORD LTDDissolved- 10793255 - Dissolved on 24 September 2019 
- MIKEL-UK LTD- 11858056 - Incorporated on 4 March 2019 
- MIKE HUB LTDDisolved- 14314406 - Dissolved on 30 January 2024 
- MIKEYS LTDDisolved- 15429864 - Dissolved on 1 July 2025 
- MIKENG LTD- 15548368 - Incorporated on 8 March 2024 
- MIKE CEE LTDActive - Proposal to Strike off- 14848404 - Incorporated on 5 May 2023 
- CERTSIMPLE LIMITEDDisolved- 09378892 - Dissolved on 1 March 2022 
- DR DAVID GALLAGHERLiquidation- NI613203 - Incorporated on 14 June 2012 
- D GALLAGHER & SONS LTD- NI631741 - Incorporated on 8 June 2015 
- COLM GALLAGHER LTDDisolved- SC613362 - Dissolved on 14 May 2024 
- GALLAGHER PUBS LTDActive - Proposal to Strike off- 10903838 - Incorporated on 8 August 2017 
- GALLAGHER RAIL LTDDisolved- 12745347 - Dissolved on 21 December 2021 
- K GALLAGHER RAIL LTDDisolved- 12790302 - Dissolved on 11 January 2022 
- GALLAGHER & THOM LTDDisolved- SC735668 - Dissolved on 6 August 2024 
- GALLAGHER CARE LTDDisolved- 14402437 - Dissolved on 16 January 2024 
- GALLAGHER GRAY LTD- 15155971 - Incorporated on 22 September 2023