- GALLAGHER WATERBEACH LIMITEDDissolved- 00640875 - Dissolved on 26 February 2019 
- GALLAGHER RESIDENTIAL LIMITED- 04063116 - Incorporated on 25 August 2000 
- GALLAGHER COLOMBIA (UK) LIMITED- 09019508 - Incorporated on 30 April 2014 
- REDFINCH SOFTWARE LIMITED- 09444678 - Incorporated on 17 February 2015 
- BEN GALLAGHER LTDDisolved- 13443204 - Dissolved on 1 October 2024 
- ARTHUR J. GALLAGHER (UK) LIMITED- 01193013 - Incorporated on 9 December 1974 
- BIG BEAR SUPPLIES LTD- 10943371 - Incorporated on 4 September 2017 
- GEORGE (WESTGATE) LIMITED- 15696923 - Incorporated on 30 April 2024 
- THEBEANBAGMAN LTDDisolved- 10407577 - Dissolved on 16 November 2021 
- MIKEVA LTDActive - Proposal to Strike off- 10676107 - Incorporated on 17 March 2017 
- MIKE 4 MEN LTDActive - Proposal to Strike off- 15542814 - Incorporated on 6 March 2024 
- MIKE ACTON C.I.C.Active - Proposal to Strike off- 07010855 - Incorporated on 7 September 2009 
- MIKELA LTDActive - Proposal to Strike off- 08681923 - Incorporated on 9 September 2013 
- MIKE&DEE LTDDisolved- 12880985 - Dissolved on 15 February 2022 
- MIKEY J D & CO LTDActive - Proposal to Strike off- 11471044 - Incorporated on 18 July 2018 
- MIKE&DAN LTD- 15859821 - Incorporated on 26 July 2024 
- NESS GALLAGHER LLPDissolved- SO301614 - Dissolved on 7 May 2010 
- GALLAGHERS GYM LTDDisolved- 07842276 - Dissolved on 14 February 2023 
- WARD & GALLAGHER LTDDisolved- 06521285 - Dissolved on 20 May 2025 
- SEAN GALLAGHER LTD- SC642950 - Incorporated on 27 September 2019