- MR & MRS LARK LTDDissolved- 08146557 - Dissolved on 26 November 2019 
- MONAGHAN CIVIL ENGINEERING LIMITED- 07061081 - Incorporated on 29 October 2009 
- ALS LOCKSMITHS (MONAGHAN) LIMITEDDissolved- NI064897 - Dissolved on 1 August 2014 
- KEYS & MONAGHAN ARCHITECTS LIMITED- NI038233 - Incorporated on 30 March 2000 
- MONAGHAN DRIVEWAYS (STOCKPORT) LIMITEDDissolved- 06515939 - Dissolved on 17 March 2015 
- ZL MONAGHAN CONSULTANCY LIMITEDDisolved- 10014994 - Dissolved on 26 December 2023 
- MONAGHAN & COMPANY DESIGN LIMITEDActive - Proposal to Strike off- 11071213 - Incorporated on 20 November 2017 
- KC MONAGHAN CONSTRUCTION LTD- NI678643 - Incorporated on 21 April 2021 
- WILLIAM MONAGHAN SERVICES LTD- NI684742 - Incorporated on 4 January 2022 
- MONAGHAN LEGAL HOLDING LIMITED- NI727538 - Incorporated on 18 March 2025 
- MR & MRS SEW 'N' SEW LTD.- 07606830 - Incorporated on 18 April 2011 
- MR&MRS CLEAN LTDDisolved- 13755600 - Dissolved on 16 May 2023 
- MR&MRS STORE LTD- 16474263 - Incorporated on 27 May 2025 
- MR N & MRS M AHMET LTD- 07433317 - Incorporated on 9 November 2010 
- MR AND MRS RAI LTDDisolved- 08886627 - Dissolved on 30 November 2021 
- MR & MRS T LIMITEDActive - Proposal to Strike off- 09846186 - Incorporated on 28 October 2015 
- MR V & MRS C SINGH LLPDisolved- OC414017 - Dissolved on 22 August 2023 
- MR & MRS PIZZA LTD- 15945634 - Incorporated on 9 September 2024 
- THOMAS & THOMAS LIMITEDDissolved- 05057302 - Dissolved on 19 July 2011 
- STEPHEN MONAGHAN TRANSPORT LIMITEDActive - Proposal to Strike off- 07248319 - Incorporated on 10 May 2010