- QUADRIGA LIMITED- 13579706 - Incorporated on 23 August 2021 
- QUADRIAN LIMITEDActive - Proposal to Strike off- 10459442 - Incorporated on 2 November 2016 
- QUADRICS LIMITEDDissolved- 03185822 - Dissolved on 5 December 2013 
- QUADRING STORE LTD- 09440799 - Incorporated on 16 February 2015 
- QUADRISK LIMITEDActive - Proposal to Strike off- 02511643 - Incorporated on 13 June 1990 
- QUADRIGY LIMITED- 06716605 - Incorporated on 7 October 2008 
- QUADRINA LIMITEDActive - Proposal to Strike off- 01026472 - Incorporated on 6 October 1971 
- QUADRIVE LIMITED- 15558310 - Incorporated on 12 March 2024 
- QUADRINITY LIMITEDDissolved- 05791544 - Dissolved on 10 August 2010 
- QUADRILLION LIMITEDDissolved- 04228855 - Dissolved on 13 August 2019 
- MR.MR. LTDDisolved- 14252327 - Dissolved on 5 December 2023 
- MR MR2 LTD- 11218539 - Incorporated on 21 February 2018 
- QUADRIGA SPORTS LLPDissolved- OC380905 - Dissolved on 7 July 2015 
- QUADRIGA UK LIMITEDDissolved- 04239063 - Dissolved on 28 February 2013 
- MR & MR LTD- 16489396 - Incorporated on 2 June 2025 
- QUADRIGIA LIMITEDDissolved- 05870197 - Dissolved on 20 September 2011 
- QUADRIC TRADING LLPActive - Proposal to Strike off- OC330273 - Incorporated on 1 August 2007 
- QUADRILLION CARS LTDDisolved- 11779529 - Dissolved on 22 April 2025 
- QUADRIGA SEARCH LLP- OC386289 - Incorporated on 1 July 2013 
- QUADRIGA AM LIMITEDDisolved- 12806411 - Dissolved on 18 January 2022