- MCMAHON CONSTRUCTION LIMITEDActive - Proposal to Strike off- 08884590 - Incorporated on 10 February 2014 
- MCMAHON SOLICITORS LIMITEDActive - Proposal to Strike off- 09259386 - Incorporated on 10 October 2014 
- MCMAHON SECURITAS LIMITEDActive - Proposal to Strike off- NI641742 
- MCMAHON CONTRACTORS LIMITEDActive - Proposal to Strike off- SC585168 - Incorporated on 9 January 2018 
- MCMAHON INTERNATIONAL LTD- 14800733 - Incorporated on 14 April 2023 
- MCMAHON TRANSPORT LTD- 16522930 - Incorporated on 17 June 2025 
- D T HENRY LTDActive - Proposal to Strike off- 10058485 - Incorporated on 11 March 2016 
- HENRY C LTD- 10344400 - Incorporated on 24 August 2016 
- T HENRY LTDActive - Proposal to Strike off- 10363913 - Incorporated on 7 September 2016 
- HENRY'S 4 U LTD- 15758625 - Incorporated on 3 June 2024 
- O HENRY LTD.Dissolved- SC346379 - Dissolved on 14 January 2011 
- A. HENRY LTD.Active - Proposal to Strike off- SC605537 - Incorporated on 16 August 2018 
- E.HENRY LTDActive - Proposal to Strike off- 10119290 - Incorporated on 12 April 2016 
- J.HENRY LTDActive - Proposal to Strike off- SC638385 - Incorporated on 9 August 2019 
- MCMAHON SERVICES LTD- 14402338 - Incorporated on 6 October 2022 
- ADAM MCMAHON LIMITED- 14437246 - Incorporated on 24 October 2022 
- MCMAHON ASSOCIATES LTD.- 02447479 - Incorporated on 29 November 1989 
- MCMAHON DEVELOPMENTS LIMITEDDissolved- 05285538 - Dissolved on 20 April 2010 
- JOANNE MCMAHON LIMITEDDisolved- 06686346 - Dissolved on 23 July 2024 
- NIALL MCMAHON LIMITED- 03905180 - Incorporated on 12 January 2000