- MCWILLIAMS GROUP LIMITED- NI660085 - Incorporated on 26 March 2019 
- ANDER MCWILLIAMS LIMITEDActive - Proposal to Strike off- NI616513 
- MCWILLIAMS ASSOCIATES LTDDissolved- 10390541 - Dissolved on 31 December 2019 
- P D MCWILLIAMS LIMITEDActive - Proposal to Strike off- 10567184 - Incorporated on 17 January 2017 
- E. & P. MCWILLIAMS LIMITED- 00960965 - Incorporated on 27 August 1969 
- NICK MCWILLIAMS LTDDisolved- 12720636 - Dissolved on 23 August 2022 
- R & E FERGUSON LIMITEDDisolved- 13162477 - Dissolved on 5 July 2022 
- MCWILLIAMS ENGINEERING LIMITED- 04741614 - Incorporated on 23 April 2003 
- PT MCWILLIAMS LIMITEDDisolved- NI046422 - Dissolved on 9 May 2024 
- MCWILLIAMS WORKS LTDActive - Proposal to Strike off- 07881987 - Incorporated on 14 December 2011 
- MCWILLIAMS ESTATES LTDDissolved- 07963132 - Dissolved on 24 September 2013 
- MCWILLIAMS GLOBAL LIMITEDActive - Proposal to Strike off- 08207872 - Incorporated on 10 September 2012 
- MCWILLIAMS CONSULTING LTD- 08893518 - Incorporated on 13 February 2014 
- MCWILLIAMS MARKETING LIMITED- 09390578 - Incorporated on 15 January 2015 
- ANTHONY MCWILLIAMS LTD- 09903652 - Incorporated on 4 December 2015 
- MCWILLIAMS FARMS LTD- NI668169 - Incorporated on 4 March 2020 
- MCWILLIAMS CONSTRUCTION LTD- 11438635 - Incorporated on 28 June 2018 
- PT MCWILLIAMS LIMITED- 16342634 - Incorporated on 25 March 2025 
- PT MCWILLIAMS GROUP LTD- NI682065 - Incorporated on 2 September 2021 
- MCWILLIAMS DECORATING CONTRACTORS LTDDisolved- 10703638 - Dissolved on 9 May 2024