| RI Tutors Limited | Education | 2012 |
| Rianisawesome Limited | Wholesale & retail | 2024 |
| Riar Construction Services Limited | Construction | 2021 |
| Riar Ltd | Transport & logistics | 2016 |
| Riar Transport Ltd | Transport & logistics | 2020 |
| Ribellione Limited | Wholesale & retail | 2026 |
| Ricardo Property Management Limited | Real estate | 2025 |
| Rich House Solution Ltd | Construction | 2025 |
| Rich Villagers Ltd | Wholesale & retail | 2026 |
| Richard & Richards Consultancy Services LP | | 2014 |
| Richard Baldwin Crane Hire Limited | Extraterritorial | 2001 |
| Richard Quality Foods Ltd | Wholesale & retail | 2019 |
| Richard Speir Limited | Arts & recreation | 2023 |
| Richard Wheatley Ltd | Manufacturing | 2021 |
| Richards Niche Care & Hair Ltd | Health & social care | 2015 |
| Richglow Limited | Financial services | 2023 |
| Richies Tours Ltd | Transport & logistics | 2020 |
| Richings Park MOT Centre Limited | Wholesale & retail | 2015 |
| Richmond Knights Ltd | Real estate | 2023 |
| Richmond Pharma Ltd | Wholesale & retail | 2020 |
| Ridan Beauty Ltd | Other services | 2019 |
| Riddhi Food UK Limited | Hospitality | 2024 |
| Riddle Box Limited | Professional & scientific | 2012 |
| Ride Executive Ltd | Transport & logistics | 2023 |
| Ride With US Limited | Transport & logistics | 2022 |
| Ridesure Motors Ltd | Wholesale & retail | 2025 |
| Ridge AI Ltd | Professional & scientific | 2025 |
| Ridgebank Management (Cippenham) Limited | Households | 1973 |
| Ridgeways Recruitment Limited | Health & social care | 2022 |
| RIG Top Services Ltd | Manufacturing | 2025 |
| Rigel Polo Limited | Education | 2020 |
| Right Building Construction Limited | Construction | 2019 |
| Right Choice Roofing & Construction Ltd | Construction | 2023 |
| Right Experts Ltd | Construction | 2024 |
| Right Nest Investments Ltd | Real estate | 2021 |
| Right NOW Taxis Ltd | Transport & logistics | 2025 |
| Right Shipping Ltd | Transport & logistics | 2016 |
| Right Tiles-Uk Limited | Wholesale & retail | 2025 |
| Rightmove Construction Ltd | Construction | 2022 |
| Rightplace Financial Services Ltd | Professional & scientific | 2006 |
| RIK Express Limited | Transport & logistics | 2015 |
| Rikisho UK Limited | Financial services | 2015 |
| Rimal Engineering Ltd | Professional & scientific | 2024 |
| Ringforce Ltd | Wholesale & retail | 2026 |
| Rinku Construction Ltd | Construction | 2022 |
| Rinku Ltd | Construction | 2022 |
| RIO HQ Limited | Administrative & support | 2026 |
| Ripley Invest Holdings Limited | Financial services | 2024 |
| Ripley Invest London Limited | Professional & scientific | 2017 |
| RIS Property Investments Ltd | Real estate | 2021 |
| Rise Above Roof Care Ltd | Construction | 2025 |
| Rise Business Solutions Limited | Information & communication | 2023 |
| Rise Marketing Ltd | Professional & scientific | 2026 |
| Rise Strategies Ltd | Professional & scientific | 2025 |
| Rise Trading Ltd | Wholesale & retail | 2025 |
| Risek Care Limited | Health & social care | 2023 |
| Rishad Atelier Ltd | Health & social care | 2021 |
| Rishikul UK Limited | Health & social care | 2024 |
| Rising Journey Group Ltd | Education | 2025 |
| Risingup Limited | Hospitality | 2018 |
| Risum Care Limited | Health & social care | 2023 |
| Rita Property Investments Limited | Real estate | 2019 |
| Rite Adhesives Ltd | Wholesale & retail | 2025 |
| Rithrish Financial Ltd | Financial services | 2026 |
| Rithrish Holdings Ltd | Financial services | 2026 |
| Rithrish Ltd | Financial services | 2020 |
| Rithrish Properties Ltd | Real estate | 2026 |
| Riveara Ltd | Real estate | 2023 |
| Rivenwood Property Investment Ltd | Real estate | 2021 |
| River Valley Online Ltd | Wholesale & retail | 2026 |
| Riverside Resources UK Limited | Administrative & support | 2019 |
| Riviera Trader Ltd | Construction | 2025 |
| Riwaayat London Ltd | Wholesale & retail | 2026 |
| RIZ Khan Makeup Ltd | Other services | 2015 |
| RIZ Property Maintenance Ltd | Construction | 2024 |
| Rizzi Ltd | Wholesale & retail | 2019 |
| RJ Courier PVT Limited | Transport & logistics | 2022 |
| RJ Fresh EGG Supplier Ltd | Wholesale & retail | 2019 |
| RJ Immigration Ltd | Professional & scientific | 2024 |
| RJ Real Estate Properties Limited | Real estate | 2024 |
| RJB New Build Limited | Construction | 2003 |
| RJK Consultants Ltd | Information & communication | 2023 |
| Rjk-Va Ltd | Administrative & support | 2019 |
| RJR Builders Ltd | Construction | 2023 |
| RJS Roofing & Guttering Services Limited | Construction | 2023 |
| RJS Staffing Services Limited | Hospitality | 2025 |
| RJV Investments Ltd | Wholesale & retail | 2025 |
| RK Accounts and Consulting Limited | Professional & scientific | 2019 |
| RK Construction Recruitment Ltd | Administrative & support | 2025 |
| RK Dwellings Limited | Real estate | 2023 |
| RK Infotech Ltd | Information & communication | 2026 |
| RK Manes Ltd | Transport & logistics | 2024 |
| RK Multani Homes Ltd | Real estate | 2025 |
| Rk&A Ltd | Construction | 2022 |
| RKB Ltd | Information & communication | 2015 |
| RKM Coffee Ltd | Hospitality | 2021 |
| Rkore Ltd | Arts & recreation | 2024 |
| RKR IT Solutions Limited | Information & communication | 2014 |
| RKS Building Services Limited | Construction | 2026 |
| Rksoft Solutions Ltd | Information & communication | 2021 |