| Queens Gardens (Kenilworth) Management Company Limited | Real estate | 2003 |
| Queldon Services Limited | Information & communication | 2026 |
| R Walia Ltd | Wholesale & retail | 2010 |
| R&J Vehicles Ltd | Wholesale & retail | 2017 |
| R.T Autostop Ltd | Wholesale & retail | 2023 |
| Raao Properties Ltd | Real estate | 2023 |
| Racer Association | Mining & quarrying | 2019 |
| RAE Consultancy Ltd | Professional & scientific | 2023 |
| Ramco S.B Fabrics Co., Limited | Extraterritorial | 2018 |
| Ramulus Ltd | Other services | 2011 |
| Rapid Terminal UK Network Limited | Information & communication | 2024 |
| Rare Breeds Survival Trust | Agriculture & fishing | 1975 |
| RAX Centre Ltd | Professional & scientific | 2017 |
| Raymond Brandl Commercials Ltd | Wholesale & retail | 2022 |
| Raymond Brandl Rentals Ltd | Administrative & support | 2022 |
| Raymond Brown Haulage Ltd | Transport & logistics | 2013 |
| Raysov Technology Co., Ltd | Extraterritorial | 2023 |
| Raythunder New Energy Co., Ltd | Administrative & support | 2021 |
| Rayton RTD Trade Ltd | Wholesale & retail | 2024 |
| Rbst Limited | Agriculture & fishing | 2010 |
| RBT Protectus UK Ltd | Other services | 2020 |
| RC Monkey Ltd | Wholesale & retail | 2022 |
| Rccn Natural Science Limited | Administrative & support | 2014 |
| RCD Creative Limited | Manufacturing | 2001 |
| RCJ Business Services Ltd | Professional & scientific | 2015 |
| RDO Medical UK Limited | Wholesale & retail | 2009 |
| RDS Property Holding Limited | Real estate | 2021 |
| Readypost Ltd | Information & communication | 2025 |
| Real Fitness Personal Training and Strength and Conditioning Limited | Arts & recreation | 2019 |
| Real Point Media Ltd | Information & communication | 2004 |
| Recap Media Ltd | Information & communication | 2025 |
| Rectory Ventures Limited | Real estate | 2016 |
| Red 4 Digital Ltd | Information & communication | 2026 |
| Red Lane Consulting Limited | Information & communication | 2014 |
| Red Panda Software Ltd | Information & communication | 2016 |
| Red Rocket Engineering Limited | Manufacturing | 2014 |
| Red Triangle Autoservices Limited | Manufacturing | 1968 |
| Redfern Kitchen Ltd | Manufacturing | 2020 |
| Redpanda Development Services Ltd | Information & communication | 2024 |
| Reform Health Ltd | Health & social care | 2026 |
| Refume Ltd | Information & communication | 2026 |
| REG20 Consulting Ltd | Administrative & support | 2020 |
| Regalbridge Estates Ltd | Real estate | 2019 |
| Regent International Trading House Limited | Real estate | 1995 |
| Regent Resources Co. , Ltd. | Administrative & support | 2023 |
| Reign Industry Limited | Administrative & support | 2015 |
| Reinge Education Ltd | Other services | 2020 |
| Rejuvenate - ALL About the Skin Limited | Other services | 2023 |
| Relay Lines UK Ltd | Transport & logistics | 2025 |
| Reliable Building Materials Co., Ltd. | Manufacturing | 2019 |
| Remedy Kenilworth Ltd | Wholesale & retail | 2026 |
| Remma Limited | Hospitality | 2025 |
| Render Right Academy Limited | Construction | 2021 |
| Renderright Finishes Limited | Construction | 2017 |
| Rene Trading Limited | Mining & quarrying | 2024 |
| Renew Invest Ltd | Financial services | 2025 |
| Rent Collection Agency Limited | Administrative & support | 1990 |
| Resolve Mediation Ltd | Professional & scientific | 2024 |
| Restorative Cleaning Ltd | Administrative & support | 2023 |
| Results Fitness Limited | Arts & recreation | 2004 |
| Reti Metal Material Co., Ltd | Administrative & support | 2017 |
| Retrofit Technical Solutions Limited | Professional & scientific | 2025 |
| Revax Bioscience Ltd | Professional & scientific | 2023 |
| Revolution Showhomes Ltd | Professional & scientific | 2025 |
| Revolve Leadership Limited | Administrative & support | 2022 |
| Reytop International Ltd | Professional & scientific | 2018 |
| RFB70 Ltd | Real estate | 2019 |
| RH Utilities Ltd | Administrative & support | 2008 |
| Rich Clean Services Ltd | Administrative & support | 2026 |
| Richard Ford Limited | Transport & logistics | 1995 |
| Rick Valentine Golf Schools Ltd | Education | 2018 |
| Ridge Trading Limited | Administrative & support | 2026 |
| Ridgeback Search Limited | Administrative & support | 2018 |
| Right Lets Property Ltd | Real estate | 2019 |
| Right Time Solutions Limited | Information & communication | 1993 |
| Rigtec Limited | Manufacturing | 2013 |
| Rising Refrigeration Co., Limited | Manufacturing | 2023 |
| Risk, Audit & Compliance Services Ltd | Professional & scientific | 2026 |
| Riskaya Trade Co., Ltd. | Extraterritorial | 2019 |
| Risso Niemela Limited | Administrative & support | 2007 |
| River Black Visuals Ltd | Information & communication | 2025 |
| River Leisure Ltd | Wholesale & retail | 2026 |
| Rizhao Y.Z.H. Shipping Agency Co., Ltd | Manufacturing | 2013 |
| RJ Taylor Decoration Limited | Professional & scientific | 2010 |
| RJM Travel Limited | Administrative & support | 2008 |
| Rjrepasts Ltd | Hospitality | 2026 |
| RKG Productions Ltd | Information & communication | 2018 |
| RLS Property Limited | Real estate | 2016 |
| Rlsonplum Ltd | Construction | 2025 |
| RM Telecoms Ltd | Professional & scientific | 2023 |
| RNC Wealth Management Ltd | Professional & scientific | 2020 |
| ROB Askew OIL Boiler Installations Ltd | Construction | 2013 |
| Rock & Roll Recruits Ltd | Other services | 2018 |
| Roelken Limited | Real estate | 1998 |
| Rohjo Properties Limited | Real estate | 2023 |
| Rokewood House Limited | Professional & scientific | 2022 |
| Ronchile Ltd | Agriculture & fishing | 2026 |
| Rongdoli International Limited | Administrative & support | 2023 |
| Room Project Limited | Other services | 2012 |
| Room Psychotherapy Ltd | Health & social care | 2022 |