| Relics of Arkanyx Ltd | Wholesale & retail | 2025 |
| Remaned UK Limited | Wholesale & retail | 2011 |
| Remar Roofing Limited | Construction | 2024 |
| Remedieagle Limited | Professional & scientific | 2026 |
| Remortgages Online Ltd | Information & communication | 2019 |
| Rems Botanics Limited | Wholesale & retail | 2019 |
| Renovations Worx Limited | Construction | 2018 |
| Rental BEE Limited | Real estate | 2024 |
| Rental Investments Ltd | Real estate | 2019 |
| Rentovia Ltd | Real estate | 2020 |
| Repair Bench (Kent) Ltd | Other services | 2026 |
| Repton Manor Associates Ltd | Real estate | 2011 |
| Repton Manor Health Clinics Limited | Health & social care | 2012 |
| Repton Park Food Ltd | Hospitality | 2023 |
| Repton Park House Ltd | Health & social care | 2021 |
| Request a Quote Limited | Information & communication | 2025 |
| Requestabuild Limited | Administrative & support | 2021 |
| Rescueops Systems Ltd | Information & communication | 2026 |
| Resilience TM / CLO Limited | Wholesale & retail | 2025 |
| Resin Design Specialist Ltd | Construction | 2025 |
| Resin Nation Limited | Extraterritorial | 2021 |
| Resin Repairs UK Limited | Construction | 2019 |
| Resolute Plastering & Property Maintenance Ltd | Construction | 2026 |
| Resolve Assets Limited | Financial services | 2025 |
| Resolve Projects Limited | Professional & scientific | 2020 |
| Resource International Limited | Professional & scientific | 1989 |
| Resource Rail Limited | Construction | 2019 |
| Resource Services Ltd | Agriculture & fishing | 2024 |
| Response Plumbing Limited | Construction | 2019 |
| Restore & Integrate Ltd | Professional & scientific | 2022 |
| Retainacar International Limited | Professional & scientific | 1984 |
| Retainacar Limited | Professional & scientific | 1982 |
| Retainagroup Limited | Administrative & support | 1996 |
| Retainaguard Limited | Professional & scientific | 1990 |
| Retalance Ltd | Professional & scientific | 2026 |
| Retirement Properties Cranbrook Limited | Construction | 2017 |
| Retirement Properties Whitfield Limited | Construction | 2017 |
| Retro & Vintage Ltd | Extraterritorial | 2020 |
| Retrotech Labs Limited | Wholesale & retail | 2016 |
| Revanta Property Limited | Real estate | 2026 |
| Revell Construction Ltd | Construction | 2021 |
| Revell Homes Limited | Construction | 2002 |
| Revells Travel Limited | Administrative & support | 2018 |
| Reverse the Tide Limited | Professional & scientific | 2016 |
| Revest Recruitment Ltd | Administrative & support | 2022 |
| Revive Cosmetics Ltd | Health & social care | 2012 |
| Revive Roofing and Renovations Ltd | Construction | 2025 |
| Revolutionaryfocus Limited | Information & communication | 2015 |
| Revolve Vehicle Servicing Ltd | Wholesale & retail | 2024 |
| Rewd Box (Thanet) Limited | Construction | 2020 |
| Rewd Limited | Administrative & support | 2016 |
| Rewd Padel Limited | Hospitality | 2020 |
| Rewild Botanicals Ltd | Wholesale & retail | 2010 |
| REX Mechanical & Electrical Services Ltd | Professional & scientific | 2022 |
| Rexmack Limited | Extraterritorial | 1982 |
| Rexregiscaeli Ltd | Health & social care | 2023 |
| Rextrek GRP Limited | Wholesale & retail | 1989 |
| Reynolds Tax & Accounts Ltd | Professional & scientific | 2025 |
| RF Mortgage Solutions Ltd | Financial services | 2018 |
| RF Rail Solutions Ltd | Other services | 2021 |
| Rfdv Ltd | Real estate | 2018 |
| RG & JG Limited | Hospitality | 2025 |
| RG Home Solutions Ltd | Construction | 2025 |
| RG Studios Ltd | Professional & scientific | 2018 |
| RGC Groundworks & Hire Limited | Construction | 2020 |
| RGJ Training Limited | Administrative & support | 2018 |
| RGP Stone Green Ltd | Construction | 2015 |
| RH Food & Wine Limited | Wholesale & retail | 2012 |
| Rhadj Radiology Services Ltd | Health & social care | 2020 |
| Rhenus High Tech Limited | Transport & logistics | 1990 |
| Rhinestone HQ Ltd | Wholesale & retail | 2022 |
| Rhinos Transport Services Ltd | Transport & logistics | 2014 |
| RHL (Bristol) Limited | Professional & scientific | 2002 |
| RHL (Construction & Property) Limited | Professional & scientific | 2006 |
| RHL (FM & Technical) Limited | Professional & scientific | 2006 |
| RHL Australia Limited | Professional & scientific | 2002 |
| RHL Recruitment Limited | Professional & scientific | 2001 |
| Rhoden Management Ltd | Professional & scientific | 2020 |
| Rhonda Wood Ltd | Administrative & support | 2022 |
| RHS Consultancy Limited | Professional & scientific | 2026 |
| RHS Distribution Ltd | Wholesale & retail | 2020 |
| Rhys Lloyd Productions Ltd | Information & communication | 2025 |
| Ri&B Ltd | Professional & scientific | 2021 |
| Ricar Solutions Limited | Manufacturing | 2026 |
| Rice Retail Marketing Limited | Professional & scientific | 2007 |
| Rich 101 Ltd | Wholesale & retail | 2009 |
| Rich Clicks Ltd | Information & communication | 2013 |
| Rich'Ll FIX IT Ltd | Construction | 2021 |
| Richard Gilbert (Heating and Plumbing) Limited | Construction | 2003 |
| Richard Sidwell Limited | Arts & recreation | 2006 |
| Richard Stafford Limited | Real estate | 2016 |
| Richard Stevens Dairies Ltd | Wholesale & retail | 2010 |
| Richardson Assets Limited | Financial services | 2025 |
| Riches Inclusive Therapies Limited | Education | 2017 |
| Richfield Hire Solutions Limited | Administrative & support | 2026 |
| Richfield Occupational Health Solutions Limited | Professional & scientific | 2020 |
| Richfield Rail Solutions Limited | Construction | 2019 |
| Richfield Real Estate Limited | Real estate | 2020 |
| Richfield Solutions Group Limited | Financial services | 2020 |
| Richfield Training Solutions Limited | Other services | 2021 |