- QUADRIUM GROUP LTDDisolved- 13678315 - Dissolved on 11 April 2023 
- QUADRILATER.AL LTD.Active - Proposal to Strike off- 09335805 - Incorporated on 1 December 2014 
- HUMELAB HOSPITALITY UK LTD- 12012454 - Incorporated on 22 May 2019 
- QUADRISOCII UK LLP- OC444297 - Incorporated on 18 October 2022 
- AL QUADRIFOGLIO LTD- 16267435 - Incorporated on 21 February 2025 
- QUADRI & CO PVT LIMITEDDisolved- 07363932 - Dissolved on 13 September 2022 
- QUADRIGA WORLDWIDE LIMITEDIn Administration- 00827164 - Incorporated on 13 November 1964 
- QUADRIC LIMITEDDissolved- 02821895 - Dissolved on 20 February 2018 
- QUADRIA LIMITEDActive - Proposal to Strike off- 02341936 - Incorporated on 1 February 1989 
- QUADRILLE-CFM LTDActive - Proposal to Strike off- 08417201 - Incorporated on 25 February 2013 
- QUADRIS LIMITED- 09515944 - Incorporated on 28 March 2015 
- QUADRIFOGLIO MT LTD- SC632402 - Incorporated on 4 June 2019 
- QUADRIN LIMITED- 08128415 - Incorporated on 3 July 2012 
- QUADRISE (DORMANT) LIMITEDDisolved- 02507321 - Dissolved on 6 February 2024 
- QUADRIGY LIVING LTD- 12248139 - Incorporated on 7 October 2019 
- QUADRIVIA LIMITEDActive - Proposal to Strike off- 09638777 - Incorporated on 15 June 2015 
- QUADRIGIS GROUP LTDActive - Proposal to Strike off- 10931868 - Incorporated on 24 August 2017 
- QUADRIFOGLIO FOUR LTD- 16135075 - Incorporated on 13 December 2024 
- QUADRIAD LIMITEDDissolved- 10193993 - Dissolved on 3 September 2019 
- QUADRIAN LIMITEDActive - Proposal to Strike off- 09339814 - Incorporated on 3 December 2014