| Risk Actuaries Ltd | Financial services | 2024 |
| Risk Modelling & Engineering Ltd | Professional & scientific | 2019 |
| Risk Professionals Limited | Professional & scientific | 2016 |
| Rita London Ltd | Wholesale & retail | 2026 |
| Rita Properties Ltd | Real estate | 2018 |
| Rits Properties Limited | Real estate | 2021 |
| Ritsha Limited | Real estate | 2023 |
| Riuc Construction Ltd | Construction | 2016 |
| Riva Fintech Consulting Ltd | Information & communication | 2020 |
| Riva Travels Ltd | Administrative & support | 2019 |
| Rivana Distribution Ltd | Wholesale & retail | 2025 |
| Rivansys Cybersecurity and IT Services UK Ltd | Information & communication | 2026 |
| Rivanta Ltd | Wholesale & retail | 2025 |
| Rivelco International Limited | Professional & scientific | 1974 |
| River Cycleway Consortium Limited | Professional & scientific | 2012 |
| River Tees Engineering Limited | Real estate | 1999 |
| Riverhill Group Ltd | Construction | 2021 |
| Riverhill Ltd | Construction | 2020 |
| Riverish Limited | Real estate | 2021 |
| Riverlake Investments Limited | Real estate | 2009 |
| Rivermark Property Ltd | Real estate | 2026 |
| Rivermed Limited | Other services | 2004 |
| Rivers Finance Group PLC | Financial services | 2002 |
| Rivers Finance Limited | Financial services | 2007 |
| Rivers Funding Limited | Administrative & support | 2017 |
| Rivers Leasing PLC | Administrative & support | 2010 |
| Rivers SPV 2 Limited | Financial services | 2022 |
| Rivers SPV Limited | Administrative & support | 2010 |
| Riversdale Services Limited | Construction | 2019 |
| Riverstone Pictures (Replicas) Limited | Information & communication | 2016 |
| Riverstone Pictures (Show Dogs) Limited | Information & communication | 2016 |
| Riverstone Pictures (Wkrk) Limited | Information & communication | 2026 |
| Riverstone Pictures Development Limited | Information & communication | 2015 |
| Riverstone Pictures Limited | Information & communication | 2014 |
| Riverview Five Ltd | Real estate | 2018 |
| Riverway Holdings Ltd | Financial services | 2026 |
| Riverworld Group Ltd | Real estate | 2022 |
| Rivexcel Limited | Professional & scientific | 2021 |
| Rivi Tech Ltd | Information & communication | 2025 |
| Rivid Limited | Administrative & support | 2025 |
| Riviera 66 Ltd | Construction | 2024 |
| Riviera Green Limited | Professional & scientific | 2016 |
| Riviera International Investments Ltd | Other services | 2022 |
| Rivington Peak Limited | Hospitality | 2014 |
| Rivolla Ltd | Wholesale & retail | 2025 |
| Riweb Ltd | Information & communication | 2026 |
| Rixon & Gower Limited | Construction | 2013 |
| Riya Beauty Limited | Other services | 2024 |
| Riya Restaurant Ltd | Hospitality | 2019 |
| Riya Travel Limited | Administrative & support | 2025 |
| Riya's Internet Trading Limited | Information & communication | 2012 |
| Riyanzo Limited | Financial services | 2021 |
| RIZ UK Inc Limited | Information & communication | 2012 |
| Riza Produce Limited | Wholesale & retail | 2018 |
| Rizai Limited | Real estate | 2021 |
| Rizess Ltd | Wholesale & retail | 2026 |
| Rizq Management Solutions Ltd | Professional & scientific | 2025 |
| RJ Assets Investment Ltd | Real estate | 2021 |
| RJ Centurion Limited | Financial services | 2020 |
| RJ Leicester Limited | Wholesale & retail | 2026 |
| RJ Portfolio Ltd | Real estate | 2019 |
| RJ Precious GEM Ltd. | Hospitality | 2022 |
| RJ3 Assets Limited | Real estate | 2015 |
| RJ3 Properties Ltd | Other services | 2015 |
| Rjautomotive & Rjtechnologies Ltd | Wholesale & retail | 2020 |
| RJB Care Ltd | Health & social care | 2023 |
| RJB Chauffeuring Ltd | Administrative & support | 2025 |
| Rjbf Consulting Limited | Professional & scientific | 2014 |
| Rjnp Ltd | Construction | 2026 |
| RJT Admin Ltd | Information & communication | 2018 |
| RK & SSK Group Limited | Financial services | 2024 |
| RK Associates Ltd | Wholesale & retail | 2015 |
| RK Data Consulting Limited | Wholesale & retail | 2015 |
| RK Explores Ltd | Administrative & support | 2025 |
| RK Gadget Hub Ltd | Wholesale & retail | 2025 |
| RK Hotels Limited | Hospitality | 2019 |
| RK Inventure Ltd | Wholesale & retail | 2018 |
| RK Land Group Limited | Real estate | 2026 |
| RK Links Builiding Services Ltd | Real estate | 2025 |
| RK LXM Security Ltd | Administrative & support | 2022 |
| RK Realty Investments Ltd | Real estate | 2023 |
| RK Shopfitting and Refrigeration Limited | Manufacturing | 2018 |
| RK Shopfitting Ltd | Manufacturing | 2025 |
| RK Super Ltd | Wholesale & retail | 2023 |
| RK Transport (UK) Limited | Transport & logistics | 2014 |
| RK Vtech Ltd | Wholesale & retail | 2025 |
| Rk&Dk Limited | Real estate | 2019 |
| RKB Trading Ltd | Hospitality | 2025 |
| RKD London Ltd | Professional & scientific | 2023 |
| Rkecommerce Ltd | Wholesale & retail | 2025 |
| RKI Systems Limited | Information & communication | 2012 |
| RKM Import & Export Ltd | Wholesale & retail | 2023 |
| RKM Investments Ltd | Real estate | 2021 |
| RKS Distribution Ltd | Wholesale & retail | 2025 |
| RKS Inc Ltd | Real estate | 2016 |
| RKS Property Rentals Limited | Real estate | 2021 |
| RKT Prestige Ltd | Hospitality | 2020 |
| RKU Consulting Ltd | Information & communication | 2017 |
| Rkvmm Limited | Wholesale & retail | 2018 |
| RKY Wholesale Ltd | Wholesale & retail | 2024 |