- S C ALLEN LTD- 07054196 - Incorporated on 22 October 2009 
- K. ALLEN LTD- NI063554 - Incorporated on 12 March 2007 
- S J ALLEN LTDActive - Proposal to Strike off- 09359330 - Incorporated on 17 December 2014 
- B. D. ALLEN LTD- SC637778 - Incorporated on 2 August 2019 
- L S ALLEN LTDDisolved- 12612918 - Dissolved on 5 July 2022 
- R&R ALLEN LTDDisolved- 12561911 - Dissolved on 30 August 2022 
- R M ALLEN LTD- 13704003 - Incorporated on 26 October 2021 
- ALLENS ACCOUNTANTS LTD.- 04383314 - Incorporated on 27 February 2002 - 123 Wellington Road South, Stockport, SK1 3TH 
- MS4 ARCHITECTS LLP- OC441738 - Incorporated on 30 March 2022 
- ALLENS LTDDisolved- 06531849 - Dissolved on 6 September 2022 
- SM ALLEN LTD- 08968047 - Incorporated on 31 March 2014 
- MR R ALLEN LTDDisolved- 10980243 - Dissolved on 30 November 2021 
- L ALLEN WP LTD- 15779923 - Incorporated on 15 June 2024 
- ZC ALLEN LTDDisolved- 13729666 - Dissolved on 2 July 2024 
- ALLEN PI LTD- 15844054 - Incorporated on 17 July 2024 
- R.J. ALLEN & CO. LTD- 07603920 - Incorporated on 14 April 2011 
- DD ALLEN LTD- 11743014 - Incorporated on 28 December 2018 
- ALLENI LTDActive - Proposal to Strike off- 09704943 - Incorporated on 27 July 2015 
- AE ALLEN LTDDisolved- 14052164 - Dissolved on 19 March 2024 
- ALLEN TM LTDActive - Proposal to Strike off- 15622165 - Incorporated on 6 April 2024