| Rondha Construction Ltd | Construction | 2024 |
| Rondha Consultancy Ltd | Professional & scientific | 2024 |
| Rondha Group Ltd | Financial services | 2024 |
| Ronham House Ltd | Real estate | 2018 |
| Ronham Management Ltd | Households | 2020 |
| Ronin Rigging Ltd | Arts & recreation | 2025 |
| Ronjay Ltd | Information & communication | 2026 |
| Roof Sheets Online Ltd | Wholesale & retail | 2023 |
| Roofano Roofs Limited | Construction | 2026 |
| Rooflight Solutions Limited | Professional & scientific | 2016 |
| Roofmapping.Com Ltd | Information & communication | 2021 |
| Rookery Business Finance Limited | Financial services | 2012 |
| Rookery Fish Bar Ltd | Hospitality | 2025 |
| Rools Ltd | Wholesale & retail | 2026 |
| Roop Transport Services Ltd | Transport & logistics | 2025 |
| Roots of Transport Ltd | Transport & logistics | 2026 |
| Rophim Health Care Limited | Health & social care | 2019 |
| Ropos Properties Ltd | Real estate | 2019 |
| Rory Antonio Hair Ltd | Other services | 2022 |
| Rosa Amour Ltd | Manufacturing | 2020 |
| Rosaline Housing and Humanity Ltd | Real estate | 2025 |
| Rosch Engineering Limited | Extraterritorial | 1994 |
| Rosco Estates Limited | Real estate | 2019 |
| Rose Garden Events Venue Ltd | Administrative & support | 2023 |
| Rosecca Ltd | Wholesale & retail | 2021 |
| Roselink Beauty Solutions Ltd | Wholesale & retail | 2019 |
| Roselink Properties Limited | Hospitality | 1998 |
| Rosemount (Clifton Road) Services Limited | Households | 1976 |
| Rosepoint Limited | Wholesale & retail | 1987 |
| Rosevalleyhill Investment Ltd | Real estate | 2021 |
| Roseville Management Limited | Administrative & support | 1997 |
| Rosewater Events Ltd | Information & communication | 2019 |
| Rosewood Equity Release Ltd | Financial services | 2025 |
| Rosie Lodge Limited | Hospitality | 2025 |
| Rosie's Garden Limited | Health & social care | 2020 |
| Ross Leasing Limited | Wholesale & retail | 2011 |
| Rossfish Ltd | Wholesale & retail | 2006 |
| Rotherby's Property Limited | Extraterritorial | 2016 |
| Rotherham Power Limited | Energy | 2022 |
| Rothley Limited | Transport & logistics | 2006 |
| Round Utilities Limited | Administrative & support | 2013 |
| Roundcroft Metal Finishing Ltd | Manufacturing | 1999 |
| Roundoak Plastering Limited | Wholesale & retail | 2006 |
| Routh Holdings Limited | Extraterritorial | 1992 |
| Rovai Car Wash Ltd | Administrative & support | 2026 |
| Rowans Nursery Property Investments Ltd | Real estate | 2021 |
| Rowley Farmer Limited | Financial services | 2017 |
| Rows Future Ltd | Construction | 2026 |
| ROX Management Limited | Professional & scientific | 2025 |
| Roxs & Stoxs Ltd | Wholesale & retail | 2026 |
| Roxy Retail Ltd | Wholesale & retail | 2025 |
| Royale B S Ltd | Real estate | 2019 |
| Royale Glaze Limited | Construction | 2016 |
| Royale Midland Limited | Wholesale & retail | 2015 |
| Royale Pathways Supported Living Ltd | Health & social care | 2026 |
| Royale Ranker Ltd | Information & communication | 2026 |
| Royeen Ltd | Wholesale & retail | 2024 |
| Royl Shopfronts Ltd | Manufacturing | 2010 |
| Royleleather Ltd | Wholesale & retail | 2025 |
| RP Business Limited | Administrative & support | 2024 |
| Rpaj Contractor Limited | Construction | 2012 |
| RPC Construction Limited | Construction | 2005 |
| RPD Media Services Ltd | Information & communication | 2023 |
| RPM 2000 Limited | Wholesale & retail | 2000 |
| Rpuk Holdco Ltd | Financial services | 2023 |
| RR Bassi Ltd | Transport & logistics | 2013 |
| RR Clearance Ltd | Education | 2025 |
| RR Financial Consultancy Limited | Professional & scientific | 2015 |
| RR Kitchens Ltd | Manufacturing | 2025 |
| RR Productions Ltd | Information & communication | 2023 |
| RR Property Ventures Ltd | Real estate | 2026 |
| RRK Trading Ltd | Wholesale & retail | 2017 |
| RRM Law Limited | Professional & scientific | 2018 |
| RRR IT Services Limited | Information & communication | 2026 |
| Rrvn Ltd | Professional & scientific | 2023 |
| RS Construction Systems Ltd | Construction | 2017 |
| RS Delivery Services Ltd | Transport & logistics | 2022 |
| RS Engineering International Limited | Professional & scientific | 1998 |
| RS Fasteners & Fixings Ltd | Wholesale & retail | 2011 |
| RS Hygiene Limited | Agriculture & fishing | 1992 |
| RS Mahal Ltd | Wholesale & retail | 2025 |
| RS MOT Station Ltd | Wholesale & retail | 2023 |
| RS Pannu Ltd | Transport & logistics | 2024 |
| RS Plant & Transport Limited | Construction | 2022 |
| RS Private Hire Limited | Wholesale & retail | 2022 |
| RS Properties (UK) Limited | Real estate | 2008 |
| RS Retailers Ltd | Wholesale & retail | 2025 |
| RS Survey & Inspection Ltd | Construction | 2023 |
| RS7 Service Limited | Information & communication | 2025 |
| RSA Food Group Ltd | Hospitality | 2018 |
| RSA Global Ltd | Professional & scientific | 2024 |
| RSA Ventures Ltd | Administrative & support | 2024 |
| Rsaa Limited | Real estate | 2016 |
| Rsaccounts Ltd | Professional & scientific | 2021 |
| RSC GAS Electric Ltd | Construction | 2019 |
| RSD Automation Limited | Professional & scientific | 2018 |
| RSD Investments & Securities Limited | Real estate | 2022 |
| RSJ Maintenance Ltd | Construction | 2025 |
| RSJ Roofing & Construction Ltd | Construction | 2025 |
| RSJ Technology Ltd | Information & communication | 2019 |