| RC Developments Ltd | Real estate | 2022 |
| RCA Investment Management Limited | Real estate | 2023 |
| RCE Luxury Developments Ltd | Construction | 2025 |
| RCT Systems and General Ltd | Professional & scientific | 2021 |
| Rcwtrucks UK Ltd | Wholesale & retail | 2025 |
| RDK Design and Build Limited | Construction | 2025 |
| RDK Developments Limited | Construction | 2024 |
| REA Construction Group Limited | Construction | 2016 |
| Read Family Pubs Limited | Hospitality | 2025 |
| Ready Freddie Limited | Other services | 2022 |
| Ready SET Davies Ltd | Construction | 2023 |
| Readycor Ltd | Administrative & support | 2015 |
| Real Famous Ltd | Wholesale & retail | 2019 |
| Real Runners Education Limited | Education | 2022 |
| Real Yvonne Limited | Wholesale & retail | 2015 |
| Real Yvonne Property Limited | Real estate | 2022 |
| Reality Home Finance Limited | Other services | 2026 |
| Reboot Workspace Ltd | Information & communication | 2026 |
| REC Parenting Limited | Information & communication | 2021 |
| Reclaim Medical Aesthetics Ltd | Health & social care | 2025 |
| Reconn + Ltd | Wholesale & retail | 2018 |
| Reczel Ltd | Administrative & support | 2018 |
| Red Creates Ltd | Professional & scientific | 2018 |
| Red Elixir Ltd | Manufacturing | 2025 |
| Red Gold London Ltd | Manufacturing | 2014 |
| Red INK Ltd | Construction | 2020 |
| Red Insight Limited | Professional & scientific | 2000 |
| Red Rose Sutton Limited | Hospitality | 2023 |
| Red Sea Experience Ltd | Administrative & support | 2017 |
| Redback Media Limited | Information & communication | 2001 |
| Redbrick (Surrey) Limited | Information & communication | 2016 |
| Redebt IP Limited | Administrative & support | 2020 |
| Redebt Trading Ltd | Financial services | 2020 |
| Redlands Services Ltd | Other services | 2024 |
| Redmane Media Limited | Professional & scientific | 2017 |
| Reef Agency Limited | Real estate | 2011 |
| REF Right Limited | Information & communication | 2004 |
| Referment Limited | Administrative & support | 2016 |
| Refine and Refresh Cleaning Services Ltd | Administrative & support | 2024 |
| Refine Tiles Ltd | Extraterritorial | 2023 |
| Reflective Consulting Ltd | Information & communication | 2024 |
| Reforged Voyages Ltd | Hospitality | 2025 |
| Refugee and Migrant Network Sutton | Education | 2012 |
| Regal DRY Cleaners (Sutton) Ltd | Other services | 2019 |
| Regalia Trading Ltd. | Wholesale & retail | 2017 |
| Regan Brothers Holdings Limited | Financial services | 2021 |
| Regan Brothers Limited | Construction | 1997 |
| Reggae Limited | Wholesale & retail | 2004 |
| Registrylink Ltd | Information & communication | 2025 |
| Regulatory Funding Company | Other services | 2013 |
| Rehnis Consultancy Limited | Information & communication | 2016 |
| Rehoboth Mixers Limited | Transport & logistics | 2016 |
| Rehoboth Services Limited | Administrative & support | 2023 |
| Reid & Co Construction Ltd | Construction | 2017 |
| Reinaa Foods Corner (RFC) Ltd | Hospitality | 2024 |
| Reiz Tech Ltd. | Financial services | 2022 |
| Rejemar Limited | Health & social care | 2009 |
| Relax at Home Limited | Real estate | 2019 |
| Releaf Tree and Garden Care Limited | Professional & scientific | 2020 |
| Reliance Professional Associates Limited | Information & communication | 2020 |
| Relight Craftsman Ltd | Construction | 2021 |
| REM Contractors Limited | Construction | 2017 |
| Remedy Laser Therapy Clinic Ltd | Other services | 2025 |
| Remington Property Limited | Real estate | 2016 |
| REMKIT1 Limited | Hospitality | 2018 |
| Remote Pharm Services Ltd | Health & social care | 2024 |
| Remulate Mortgages Ltd | Administrative & support | 2023 |
| Renaissance Family Office Limited | Administrative & support | 2023 |
| Renaissance FFE Limited | Construction | 2023 |
| Renata Silva Children's Rehab Ltd | Health & social care | 2026 |
| Rennova Build Solutions Ltd | Construction | 2024 |
| Rennova Homes Ltd | Real estate | 2025 |
| Renovations-Etc Ltd | Construction | 2021 |
| Renpautrice Ltd | Health & social care | 2020 |
| Rent Along Limited | Wholesale & retail | 2019 |
| Rent LAB PVT Limited | Real estate | 2018 |
| Rentbrella UK Ltd | Administrative & support | 2022 |
| Renzo Talent Ltd | Administrative & support | 2024 |
| Repologic Limited | Professional & scientific | 2006 |
| Repton Creative Limited | Professional & scientific | 2015 |
| Rero Investments Limited | Real estate | 2009 |
| Rero Property Ltd | Extraterritorial | 2017 |
| Research Integrity Chain Ltd | Information & communication | 2024 |
| Residency Builders Ltd | Construction | 2008 |
| Resilient Cactus Consulting Ltd | Professional & scientific | 2021 |
| Resolutions Employment Agency Ltd | Administrative & support | 2015 |
| Resonance Sounds DJ Ltd | Information & communication | 2019 |
| Resource Europe Ltd | Information & communication | 2013 |
| Resource Lynx Limited | Wholesale & retail | 2017 |
| Resourcing 50 Limited | Other services | 2019 |
| Resplendent Technology Limited | Information & communication | 1993 |
| Respnse Medical Ltd | Information & communication | 2020 |
| Response Team 247 Limited | Administrative & support | 2021 |
| Responsible Other Ltd | Education | 2024 |
| Ressm Ltd | Extraterritorial | 2025 |
| Restora Headspa Ltd | Other services | 2025 |
| Restore Replace Flooring Ltd | Wholesale & retail | 2026 |
| Retro Consoles Ltd | Other services | 2025 |
| Retrohound Ltd | Wholesale & retail | 2026 |
| Revalis Real Estate Limited | Real estate | 2026 |