| Regent House Properties & Developments Limited | Real estate | 2018 |
| Regents Opera Ltd | Arts & recreation | 2013 |
| Regulatory Compliance Limited | Professional & scientific | 2007 |
| Regulatory Compliance Services Limited | Professional & scientific | 2010 |
| Regzon Ltd | Wholesale & retail | 2024 |
| Reinstallation Synthesis UK Trading Ltd | Wholesale & retail | 2025 |
| REJUVENETICS@10 Church Lane Limited | Other services | 2013 |
| Remain 68 CBM Ltd | Wholesale & retail | 2023 |
| Remember Rhythm Community Interest Company | Health & social care | 2023 |
| Reminder Applications Limited | Administrative & support | 2016 |
| Renegade Productions Limited | Information & communication | 2021 |
| Renew Glazing Installations Limited | Construction | 2019 |
| Renewable Solutions (Staffordshire) Ltd | Construction | 2022 |
| RENOVATE484 Ltd | Construction | 2024 |
| Rental Support Limited | Construction | 2004 |
| Renticy Limited | Information & communication | 2024 |
| Repoint Brickwork & Landscaping Ltd | Professional & scientific | 2025 |
| Resicare Solutions Ltd | Information & communication | 2024 |
| Residential Repair Services Ltd | Households | 2021 |
| Resilient Alliance Care Ltd | Public administration | 2024 |
| Resona Consulting Ltd | Professional & scientific | 2022 |
| Rest Easy Consultancy Limited | Real estate | 2023 |
| Rest Easy Hospitality Limited | Hospitality | 2024 |
| Resurrection Power Ministries Ltd | Other services | 2016 |
| Retro Restoration Ltd | Extraterritorial | 2022 |
| Retro Rides Limited | Wholesale & retail | 2026 |
| Retro Upgrade Limited | Professional & scientific | 2025 |
| Retrofit Academy (Solutions) Limited | Professional & scientific | 2016 |
| Retrofit Academy Group Limited | Financial services | 2023 |
| Retrofit and Renew Limited | Professional & scientific | 2026 |
| Retroix Ltd | Wholesale & retail | 2023 |
| Reule Holdings Limited | Extraterritorial | 2016 |
| Reule Limited | Extraterritorial | 2011 |
| Revamp Reno Innovations Ltd | Professional & scientific | 2020 |
| Reverie Property Ltd | Households | 2019 |
| Revolution Carpentry Ltd | Construction | 2025 |
| Revolve Collective Limited | Education | 2025 |
| Revvs Limited | Administrative & support | 2004 |
| Reynolds Industrial Services Limited | Real estate | 1990 |
| Reynolds Rentals Limited | Hospitality | 2017 |
| RFG Utilities Limited | Agriculture & fishing | 2020 |
| RG Arborist's Ltd | Extraterritorial | 2007 |
| RG Hospitality Limited | Hospitality | 2025 |
| RGE Advisory Limited | Financial services | 2015 |
| RGE Projects Ltd | Energy | 2015 |
| RH Equine Ltd | Agriculture & fishing | 2021 |
| RH Rail Operations Ltd | Professional & scientific | 2024 |
| Rhbth Property Ltd | Real estate | 2026 |
| Rhine Mediami Ltd | Wholesale & retail | 2025 |
| RHS Performance Ltd | Wholesale & retail | 2022 |
| Rian Enterprise Limited | Extraterritorial | 2014 |
| Richard Burke Commercial Limited | Professional & scientific | 2014 |
| Richard James Davies Limited | Extraterritorial | 2022 |
| Richards Financial Limited | Financial services | 2010 |
| Richer Rolling Paper Co., Ltd. | Extraterritorial | 2015 |
| Richsea Property Group Limited | Real estate | 2021 |
| Rickerscote Convenience Store Ltd | Wholesale & retail | 2026 |
| Ridgeway Plumbing & Heating Ltd | Construction | 2013 |
| Ridgeway Properties (Staffs) Ltd | Real estate | 2018 |
| Ridgewood Court Management Company Limited | Households | 2024 |
| Right Touch Testing Ltd | Information & communication | 2015 |
| Righteous Roofing & Property Maintenance Ltd | Construction | 2025 |
| RIH Property Ltd | Real estate | 2018 |
| Riley Estates Management Ltd | Real estate | 2024 |
| Ringleads Ltd | Administrative & support | 2021 |
| Rinotech UK Limited | Wholesale & retail | 2023 |
| Ripsaw Ltd | Information & communication | 2013 |
| Risetech Digital Ltd | Wholesale & retail | 2025 |
| Rising Brook Baptist Church | Other services | 2010 |
| Rising Brook Healthcare Limited | Health & social care | 2013 |
| Rising Brook Hospitality (Catering and Care) Limited | Hospitality | 2013 |
| Rising Brook Surgery GPF Limited | Professional & scientific | 2014 |
| Risk Dashboard (UK) Limited | Information & communication | 2017 |
| Rivco Limited | Wholesale & retail | 1994 |
| River Canal Rescue Limited | Professional & scientific | 2000 |
| Riverside Storage Solutions Limited | Administrative & support | 2007 |
| Riverstone Performance Marketing Ltd | Professional & scientific | 2025 |
| RJ & SA Tinkler Limited | Wholesale & retail | 2008 |
| RJ Development (Penkridge) Ltd | Construction | 2026 |
| RJ Development Group Ltd | Construction | 2024 |
| RJB Lettings Ltd | Real estate | 2019 |
| RJC Projects Limited | Real estate | 2007 |
| RJJ Engineering Limited | Construction | 2008 |
| RJN Engineering Selection Ltd | Administrative & support | 2013 |
| RJO Horseshoes Ltd | Hospitality | 2026 |
| Rjohnh Consultancy Limited | Professional & scientific | 2019 |
| RJR IT Consultancy Ltd | Information & communication | 2023 |
| Rjrn Holdings Ltd Limited | Hospitality | 2020 |
| RJS Care Ltd | Professional & scientific | 2024 |
| RJW Interiors Ltd | Construction | 2019 |
| RKJ Motors Ltd | Wholesale & retail | 2024 |
| RKT Property Services Limited | Real estate | 2017 |
| RLS Group Ltd | Real estate | 2020 |
| RM Hospitality Services Ltd | Professional & scientific | 2023 |
| RMH Old Stocks Limited | Hospitality | 2013 |
| RMN Property Services Limited | Real estate | 2016 |
| RMS Consulting Limited | Professional & scientific | 2014 |
| RNG EDG Ltd | Wholesale & retail | 2025 |
| Rnihomes Ltd | Real estate | 2024 |
| RNJ Developments Ltd | Construction | 2024 |