| Racondo Limited | Professional & scientific | 2006 |
| Radiant Life Health Care Ltd | Health & social care | 2024 |
| Radiant RX Ltd | Manufacturing | 2023 |
| Radiotrade Limited | Extraterritorial | 2023 |
| Radley Services Limited | Extraterritorial | 1991 |
| Radyne Limited | Manufacturing | 1978 |
| Rahman Motor Group Ltd | Wholesale & retail | 2019 |
| Rajashree Real Estates Ltd | Real estate | 2024 |
| Ralytrans Ltd | Transport & logistics | 2019 |
| Ramana Foods Limited | Hospitality | 2010 |
| Rampax Limited | Transport & logistics | 2024 |
| Rams Capital Limited | Financial services | 2023 |
| Rams Estates Ltd | Real estate | 2021 |
| Rams IT Consulting Ltd | Information & communication | 2018 |
| Ramsgate Care Limited | Health & social care | 2014 |
| Randall Accountancy Ltd | Professional & scientific | 2023 |
| Randall Property Management Limited | Real estate | 2017 |
| Randalls Residential Ltd | Real estate | 2019 |
| Ranger Instrument Company Limited(The) | Wholesale & retail | 1963 |
| Rangewell Limited | Professional & scientific | 2014 |
| Ranjster Limited | Information & communication | 2017 |
| RAP Sports & Media Consultancy Ltd | Wholesale & retail | 2024 |
| Rapid Clear Limited | Water & waste | 2025 |
| RAR Express Ltd | Transport & logistics | 2025 |
| Rasavi Enterprises Limited | Wholesale & retail | 2021 |
| Rashvi Technologies Ltd | Information & communication | 2018 |
| Rather Alarming Limited | Administrative & support | 2025 |
| RAW Personal Training Ltd | Arts & recreation | 2021 |
| RAW Social Limited | Professional & scientific | 2025 |
| Rawdon Close (2012) Limited | Households | 2021 |
| Rawlings Transport (1972 ) Limited | Transport & logistics | 1962 |
| RAY Capital Ltd | Professional & scientific | 2014 |
| Rayfos Ltd | Manufacturing | 2012 |
| Raynar Juttla Services Limited | Real estate | 2022 |
| Rayner Appliance Care Limited | Administrative & support | 2002 |
| Razorsecure Limited | Information & communication | 2014 |
| Razuro Ltd | Wholesale & retail | 2025 |
| RBC (Hampshire) Limited | Construction | 2012 |
| Rbex Ltd | Wholesale & retail | 2025 |
| Rcnetshop Ltd | Wholesale & retail | 2021 |
| Rczm Limited | Professional & scientific | 2014 |
| RD IT Consultancy Ltd | Information & communication | 2022 |
| RD Tattoo Removal Ltd | Other services | 2023 |
| RDP Joseph Limited | Construction | 2016 |
| RDS Autocare Limited | Wholesale & retail | 2021 |
| Re-Gas Energy Limited | Energy | 2017 |
| Re-Searchhindu Ltd | Education | 2024 |
| Re-Tyre Finance Ltd | Other services | 2023 |
| Re-Tyre Limited | Manufacturing | 2023 |
| Re-Tyre Management Limited | Wholesale & retail | 2023 |
| Re-Tyre Tech Limited | Manufacturing | 2023 |
| Reach Education Consultants Limited | Education | 2024 |
| Read Farming Ltd | Agriculture & fishing | 2016 |
| Read Property Development Ltd | Construction | 2025 |
| Readybase Group Ltd | Information & communication | 2024 |
| Real Mechanical & Electrical Limited | Professional & scientific | 2015 |
| Real Residency Properties Limited | Real estate | 2024 |
| Real Talk Ltd | Administrative & support | 2026 |
| Reality HR Limited | Administrative & support | 2007 |
| Realm Collective Ltd | Wholesale & retail | 2026 |
| Reapy Construction Ltd | Construction | 2016 |
| Reassured (Health) Limited | Financial services | 2012 |
| Reassured Limited | Financial services | 2009 |
| Receptionhq LLP | | 2010 |
| Recite Consulting IT Limited | Information & communication | 2025 |
| Recks Real Ltd | Professional & scientific | 2023 |
| Recognology Limited | Extraterritorial | 2015 |
| Recolo UK Limited | Administrative & support | 2007 |
| Reconal Design Limited | Wholesale & retail | 2021 |
| Reconal Ltd | Construction | 2018 |
| Recyclr Group Ltd | Water & waste | 2026 |
| Red Cell Risk Limited | Professional & scientific | 2012 |
| Red Dress Events Limited | Administrative & support | 2013 |
| Red Ibex Ltd | Professional & scientific | 2024 |
| Red Kite Carpentry Limited | Construction | 2013 |
| Red Splash (Holdings) Limited | Professional & scientific | 2007 |
| Red SQ Ltd | Information & communication | 2015 |
| Redair Aviation Limited | Transport & logistics | 2007 |
| Redan Ltd | Information & communication | 2019 |
| Redwing Express Limited | Wholesale & retail | 2024 |
| Reel-Clean Ltd | Administrative & support | 2025 |
| Reemar Paper Limited | Wholesale & retail | 1985 |
| Reflections Wholesale Limited | Wholesale & retail | 2026 |
| Reframe Health Limited | Other services | 2019 |
| Regal Boys Ltd | Transport & logistics | 2023 |
| Regarding Giraffe Ltd | Wholesale & retail | 2024 |
| Regensuites Limited | Other services | 2026 |
| Regeometra Ltd | Information & communication | 2023 |
| Reggae Feast Catering Ltd | Hospitality | 2021 |
| Reid Assets Limited | Financial services | 2024 |
| Reids Trade Supplies Ltd | Wholesale & retail | 2022 |
| Rejuvenate Health & Beauty Ltd | Other services | 2016 |
| Relax Airlines Limited | Transport & logistics | 2024 |
| Relentless Limited | Extraterritorial | 2007 |
| Reliable Foods Limited | Hospitality | 2019 |
| Rema Deepz Ltd | Hospitality | 2016 |
| Rems Dijital Ltd | Wholesale & retail | 2025 |
| Renatus Services Limited | Administrative & support | 2022 |
| Renown Renovations Limited | Construction | 2021 |
| Rent Assist Ltd | Wholesale & retail | 2019 |