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- ROUND 45 LIMITEDActive - Proposal to Strike off- 08005580 - Incorporated on 26 March 2012 
- ROUNDHAYE LTDDissolved- 08013855 - Dissolved on 12 November 2013 
- ROUND O LIMITED- 03820110 - Incorporated on 5 August 1999 
- ROUNDTURN LTDActive - Proposal to Strike off- 06891282 - Incorporated on 29 April 2009 
- ROUND PIXEL LTDActive - Proposal to Strike off- 08963471 - Incorporated on 27 March 2014 
- ROUND STAR UK LTD- 09206276 - Incorporated on 5 September 2014 
- T W ROUND LIMITED- 09388613 - Incorporated on 14 January 2015 
- ROUND MEDIA LTDActive - Proposal to Strike off- 10908987 - Incorporated on 10 August 2017 
- ROUND ANGLE LTDActive - Proposal to Strike off- 10124407 - Incorporated on 14 April 2016 
- ROUNDCORP LTD- 11845139 - Incorporated on 25 February 2019 
- ROUNDTONE LTD- 10619615 - Incorporated on 14 February 2017 
- UK ROUNDNET LTDActive - Proposal to Strike off- 10714063 - Incorporated on 6 April 2017 
- 2ND TIME ROUND LTDDisolved- 10270604 - Dissolved on 2 November 2021 
- WRONG WAY ROUND C.I.C.Disolved- 14169200 - Dissolved on 4 March 2025 
- ROUND 121 LIMITEDDisolved- 14320184 - Dissolved on 30 January 2024 
- DMV ROUNDAL LTD- SC785169 - Incorporated on 6 October 2023 
- ROUND LEMON LTDDisolved- 12966402 - Dissolved on 24 January 2023 
- ROUNDSURE LTD- 15991751 - Incorporated on 1 October 2024 
- ROUND SOUND LTD- 16341170 - Incorporated on 25 March 2025