| Renaissance Recruitment Ltd | Administrative & support | 2020 |
| Renew Housing Network Ltd | Real estate | 2026 |
| Renewables-Uk Ltd | Professional & scientific | 2025 |
| Renton Rentals Limited | Real estate | 2017 |
| Repton Tea Rooms Ltd | Hospitality | 2009 |
| Residential Boat Owners Association | Other services | 2015 |
| Resin Leads UK Ltd | Information & communication | 2026 |
| Resin Trade Limited | Wholesale & retail | 2015 |
| Resolute Property Group Ltd | Real estate | 2018 |
| Restoration Roofing Services Ltd | Construction | 2025 |
| Retail Management and Consultancy Ltd | Professional & scientific | 2013 |
| Retailr OG Ltd | Wholesale & retail | 2020 |
| Revalo Holdings Ltd | Administrative & support | 2022 |
| Revamp Property Services Ltd | Construction | 2025 |
| Revival Holdings Ltd | Real estate | 2025 |
| Revival Property Letting Limited | Real estate | 2026 |
| Revival Roofing and Loft Services Limited | Construction | 2024 |
| Revolution Entertainment Systems Holdings Limited | Extraterritorial | 1997 |
| Revolution Entertainment Systems Limited | Extraterritorial | 1965 |
| Revolution Foods Fulfilment Limited | Transport & logistics | 2022 |
| Revolution Foods Ltd | Wholesale & retail | 2011 |
| REWARDS4GOLF Limited | Other services | 2008 |
| REWARDS4RACING Limited | Other services | 2009 |
| RFI Property Group Limited | Real estate | 2021 |
| Rftconsults Ltd | Construction | 2025 |
| RH Group Holdings Ltd | Financial services | 2018 |
| RH Motors Ltd | Wholesale & retail | 2017 |
| RH Squared Limited | Real estate | 2025 |
| Rhema D. Civil Engineering Ltd | Professional & scientific | 2019 |
| Rhino Business Park Management Company Limited | Administrative & support | 2007 |
| Rhino Talent Acquisition Ltd | Administrative & support | 2024 |
| Ricardo Transport Limited | Transport & logistics | 2013 |
| Richard Thomas Shiels Limited | Extraterritorial | 2024 |
| Richard-Thomas | Extraterritorial | 2023 |
| Ridware Architectural Limited | Manufacturing | 2007 |
| Right Place 4 Home Ltd | Real estate | 2025 |
| Right Step Homes Limited | Real estate | 2014 |
| Rihi Plumbing and Heating Ltd | Construction | 2024 |
| Riko Roofing Ltd | Construction | 2026 |
| Rise Digital Marketing Ltd | Professional & scientific | 2022 |
| Rise Events Ltd | Hospitality | 2026 |
| Rita Healthcare Limited | Health & social care | 2025 |
| Rius Anaesthetics Limited | Health & social care | 2021 |
| Riverbrook Holdings Ltd | Financial services | 2026 |
| Riverdale Terra Limited | Construction | 2016 |
| Riverside Consultants (Mildenhall) Limited | Households | 1982 |
| RJ5 Ltd | Water & waste | 2024 |
| RJS Properties and Holding Ltd | Financial services | 2024 |
| RJS Repairs Limited | Professional & scientific | 2021 |
| Rkbb Investments Ltd | Financial services | 2022 |
| RKC Limited | Professional & scientific | 2015 |
| RL Commercial Services Limited | Construction | 2015 |
| RLC Property Renovations Ltd | Real estate | 2024 |
| RM Baxter Ltd | Wholesale & retail | 2025 |
| RM Burton Properties Limited | Construction | 2023 |
| RMG Corporate Ltd | Administrative & support | 2019 |
| Rmhk Properties Limited | Real estate | 2026 |
| Rmhk@Jscare Limited | Health & social care | 2018 |
| RMM Roofing Limited | Construction | 2018 |
| Rmmi Ltd | Construction | 2025 |
| RNP Limited | Wholesale & retail | 2020 |
| Roadside Remedy Ltd | Professional & scientific | 2026 |
| Roberts U.K. Limited | Wholesale & retail | 1997 |
| Robey Engineering Solutions Limited | Professional & scientific | 2018 |
| Robinflora Ltd | Real estate | 2026 |
| Robinson and Bromage Limited | Financial services | 1990 |
| ROBRC1 Ltd | Wholesale & retail | 2020 |
| Rocket 22 Ltd | Professional & scientific | 2023 |
| Rokit Personnel Ltd | Administrative & support | 2019 |
| Rolbull-Trans Ltd | Transport & logistics | 2014 |
| Rollem Properties Limited | Real estate | 2016 |
| Rolleston Investments Limited | Real estate | 1973 |
| Rollo Civil Engineering Ltd | Construction | 2022 |
| Roma Pharmaceuticals Limited | Manufacturing | 2016 |
| Romal Trans Ltd | Transport & logistics | 2014 |
| Romara Ltd | Extraterritorial | 2022 |
| Romeng Limited | Real estate | 2017 |
| Romulus Consultancy Ltd | Professional & scientific | 2021 |
| Rookswell Limited | Professional & scientific | 2025 |
| Rookswell Prop Co Ltd | Real estate | 2026 |
| ROOT38 Limited | Information & communication | 2016 |
| Roots Care Group Ltd | Health & social care | 2024 |
| Rope & Reins Ltd | Wholesale & retail | 2026 |
| Rosa Real Estate Ltd | Real estate | 2025 |
| Rosa Recruitment & Consulting Limited | Wholesale & retail | 2024 |
| Rose Haulage Co Ltd | Transport & logistics | 2026 |
| Roseview Care Group Ltd | Health & social care | 2022 |
| Rosliston Cars Ltd | Transport & logistics | 2021 |
| Rossi Lisa Ltd | Hospitality | 2022 |
| Routerise Logistics Ltd | Transport & logistics | 2025 |
| Rowdy Shack Ltd | Wholesale & retail | 2020 |
| ROY & RON Properties Limited | Real estate | 2022 |
| ROY Glennon Building Services Limited | Construction | 2016 |
| ROY Group Ltd | Administrative & support | 2023 |
| Royel Food Ltd | Wholesale & retail | 2025 |
| Royle Business Park Ltd | Agriculture & fishing | 2020 |
| Royle Farm Renewables Limited | Energy | 2025 |
| Royle Forest Weddings Limited | Real estate | 2019 |
| Roylresin Ltd | Construction | 2025 |
| RP Roofing & Construction Ltd | Manufacturing | 2017 |