| Rigo Electrical Ltd | Manufacturing | 2022 |
| Rihla Ltd | Transport & logistics | 2025 |
| RIK (GB) Ltd | Construction | 1999 |
| RIK Ltd. | Professional & scientific | 2010 |
| Rikko Express Limited | Hospitality | 2024 |
| Riley Consulting Limited | Professional & scientific | 2007 |
| Rili Construction Ltd. | Construction | 2017 |
| Rilyaak Ltd | Professional & scientific | 2018 |
| Rimava Limited | Information & communication | 2009 |
| Rimu Music Education Services Limited | Education | 2013 |
| Ringley Road (Horsham) Residents Management Company Limited | Households | 2015 |
| Ringwood Accountants & Tax Advisers Limited | Professional & scientific | 2015 |
| Rinomamaim Ltd | Health & social care | 2022 |
| Rins PVT Ltd | Construction | 2024 |
| RIO IV Limited | Hospitality | 2026 |
| RIO Solutions Limited | Information & communication | 2025 |
| Rio's Piri Piri (Croydon) Limited | Hospitality | 2013 |
| Rio's Piri Piri Holdings Ltd | Financial services | 2021 |
| Ripon and Ripley Ltd | Households | 2021 |
| Ripples and Waves Limited | Manufacturing | 2022 |
| Ripples Care Ltd | Health & social care | 2018 |
| Risa Properties Limited | Real estate | 2021 |
| Riscaire Limited | Professional & scientific | 2014 |
| Riscou Drylining Limited | Construction | 2008 |
| Rise and Flouriish Ltd | Wholesale & retail | 2025 |
| Rise and Prosper Ltd | Health & social care | 2022 |
| Rise Media LR Limited | Information & communication | 2026 |
| Rise of Superstars Ltd | Wholesale & retail | 2025 |
| Rise Youth Group Limited | Information & communication | 2011 |
| Rishan Limited | Wholesale & retail | 2005 |
| Rising Stars Childcare Education Ltd | Health & social care | 2024 |
| Rising Stars Support CIC | Health & social care | 2014 |
| Risingholme Court AB Limited | Real estate | 2024 |
| Risingholme Court CD Limited | Real estate | 2024 |
| Risingholme Court EF Limited | Real estate | 2024 |
| Risingholme Court GH Limited | Real estate | 2024 |
| Risingholme Court IJ Limited | Real estate | 2024 |
| Risingholme Court KL Limited | Real estate | 2024 |
| Risingholme Court Limited | Real estate | 2024 |
| Risingholme Court MN Limited | Real estate | 2024 |
| Risingholme Court OP Limited | Real estate | 2024 |
| Risingholme Court QR Limited | Real estate | 2024 |
| Risingholme Court ST Limited | Real estate | 2024 |
| Risingholme Court UV Limited | Real estate | 2024 |
| Risingholme Court WX Limited | Real estate | 2024 |
| Risingholme Court YZ Limited | Real estate | 2024 |
| Risk Practitioners Ltd | Financial services | 2021 |
| Risun Properties Ltd | Real estate | 2025 |
| Rita Nova Group Ltd | Administrative & support | 2025 |
| Riva (Lewisham) Management Company Limited | Households | 2010 |
| Riva Investment Ltd | Wholesale & retail | 2014 |
| Rivendell Ltd | Health & social care | 2022 |
| River Court (Taplow) Limited | Real estate | 2017 |
| River Terrace (ST. Neots) Management Company Limited | Households | 1985 |
| River Terrace Owners (ST Neots) Company Limited | Households | 2013 |
| Riverdene House Residents Company Limited | Households | 1992 |
| Rivereat Ltd | Hospitality | 2026 |
| Riverhead Management Limited | Real estate | 2004 |
| Riverhead Music Ltd | Information & communication | 2020 |
| Rivermouth Court Management Company Limited | Households | 2002 |
| Riverside (Bournemouth) Ltd | Administrative & support | 2010 |
| Riverside (Godalming) Management Company Limited | Households | 2013 |
| Riverside (Great Shelford) Management Company Limited | Households | 2015 |
| Riverside Maintenance Limited | Households | 1980 |
| Riverside Place (Carnforth) Management Company Limited | Households | 2023 |
| Riverside Plaza Limited | Real estate | 2002 |
| Riverside Plaza RTM Company Limited | Households | 2013 |
| Riverview Heights Property Management Limited | Households | 1960 |
| Riviera Edition Limited | Information & communication | 2024 |
| Riwaaz Boutique Limited | Manufacturing | 2017 |
| RIX Consulting Limited | Professional & scientific | 2016 |
| Rizwan Ahmed Ltd | Professional & scientific | 2017 |
| Rizza Danico Productions Ltd | Information & communication | 2017 |
| Rizzam Ltd | Wholesale & retail | 2021 |
| RJ Horizons Ltd | Real estate | 2024 |
| RJB Logistics Training Limited | Transport & logistics | 2024 |
| RJB786 Foods Ltd | Hospitality | 2024 |
| Rjdetailing Ltd | Administrative & support | 2025 |
| Rjsl Holdings Limited | Financial services | 2026 |
| RK Food Factory Limited | Hospitality | 2026 |
| RKG Consultants Ltd | Professional & scientific | 2005 |
| RKG Rentals Ltd | Real estate | 2025 |
| Rkms Service Ltd | Construction | 2026 |
| RKS Accountants Ltd | Professional & scientific | 2015 |
| RKW Development Limited | Real estate | 2022 |
| RKY Developments Ltd | Construction | 2022 |
| RL Assets Ltd | Real estate | 2017 |
| RLD Electrical and Mechanical Services Ltd | Construction | 2021 |
| RLD Renewable Energy Ltd | Energy | 2023 |
| RLS Brickwork Ltd | Manufacturing | 2017 |
| Rluk & Co Ltd | Construction | 2012 |
| RM Dent Ltd | Health & social care | 2023 |
| RM Design & Develop Ltd | Construction | 2005 |
| RM Dream Build Ltd | Construction | 2018 |
| RM Facilities Management Solutions Ltd | Hospitality | 2012 |
| RM Traders London Ltd | Wholesale & retail | 2020 |
| RMA Technologies Limited | Information & communication | 2017 |
| RML Capital Ltd | Real estate | 2015 |
| RML Property Ltd | Real estate | 2011 |
| RMP Food Ltd | Hospitality | 2022 |