- MR & MRS WARWICK LTD- 09866159 - Incorporated on 10 November 2015 
- MR & MRS WALKIES LTD- 11895593 - Incorporated on 21 March 2019 
- MR AND MRS SNARK LTDDisolved- 15094153 - Dissolved on 28 January 2025 
- MR & MRS VINTAGE LTDDisolved- 14474020 - Dissolved on 16 April 2024 
- MCMAHON (CONTRACTORS SERVICES) LIMITEDIn Administration/Administrative Receiver- 03161331 - Incorporated on 19 February 1996 
- MCMAHON DESIGN SERVICES LIMITEDDissolved- 03396823 - Dissolved on 8 January 2013 
- R. MCMAHON ENGINEERING LIMITEDActive - Proposal to Strike off- 01169977 - Incorporated on 13 May 1974 
- NICKALLS ROCHE MCMAHON LIMITEDLiquidation- 03235963 - Incorporated on 9 August 1996 
- E. MCMAHON (TRANSPORT) LIMITEDLiquidation- 01322613 - Incorporated on 22 July 1977 
- MCMAHON PROJECT SOLUTIONS LTDActive - Proposal to Strike off- 05070375 - Incorporated on 11 March 2004 
- MCMAHON SYSTEM SOLUTIONS LIMITEDActive - Proposal to Strike off- 08090919 - Incorporated on 31 May 2012 
- MCMAHON MARKETING COMMUNICATIONS LIMITEDDisolved- 09289533 - Dissolved on 22 February 2022 
- SIMON MCMAHON CONSULTING LIMITEDDisolved- 08708547 - Dissolved on 21 December 2021 
- TYE MCMAHON & ASSOCIATES LIMITEDActive - Proposal to Strike off- 09625771 - Incorporated on 5 June 2015 
- MCMAHON ELECTRICAL SERVICES LIMITED- 11474949 - Incorporated on 20 July 2018 
- MCMAHON PROPERTY INVESTMENTS LIMITEDDissolved- 10255478 - Dissolved on 17 September 2019 
- RJ MCMAHON CONSTRUCTION LIMITEDActive - Proposal to Strike off- 10579326 - Incorporated on 24 January 2017 
- MCMAHON PHARMA CONSULTING LTDDissolved- SC559280 - Dissolved on 29 June 2021 
- MCMAHON COMMERCIAL PROPERTIES LTD- 13627161 - Incorporated on 16 September 2021 
- MCMAHON GAS & ELECTRICAL LIMITEDDisolved- 15291355 - Dissolved on 22 April 2025