| Rink 12 Kitchen Ltd | Hospitality | 2026 |
| Rinna Transport Ltd | Transport & logistics | 2023 |
| RIO Heating Limited | Manufacturing | 2017 |
| Ripple Sales Consultancy Limited | Professional & scientific | 2018 |
| Ripples Digital Ltd | Information & communication | 2020 |
| Rippon - Swaine Associates Ltd | Extraterritorial | 2006 |
| Rise and Thrive (South East) Ltd | Health & social care | 2025 |
| Rise Business Consultancy Ltd | Other services | 2025 |
| Rise High Education Ltd | Wholesale & retail | 2025 |
| Rise Properties (SW) Ltd | Real estate | 2023 |
| Rise UP Ventures Limited | Financial services | 2025 |
| Rise-Schools Ltd | Professional & scientific | 2025 |
| Rising Paths Ltd | Wholesale & retail | 2024 |
| Riskpath Limited | Information & communication | 2016 |
| Riskpoint Fire Safety Limited | Public administration | 2025 |
| Ritcs Limited | Wholesale & retail | 2009 |
| Rite Group Holdings Limited | Wholesale & retail | 2020 |
| Ritos United Ltd | Professional & scientific | 2026 |
| Ritualtech Limited | Wholesale & retail | 2026 |
| Rival 4 Limited | Construction | 2007 |
| Rivencore Global Solutions Limited | Manufacturing | 2014 |
| Rivencore International Holdings Limited | Financial services | 2026 |
| River Court Management Company (Spalding) Limited | Households | 1996 |
| River TAO Limited | Real estate | 2023 |
| River Walk Management (Christchurch) Company Ltd | Real estate | 2025 |
| Riverside Aromatics Limited | Wholesale & retail | 2006 |
| Riverside Court Management (Bournemouth) Limited | Households | 1988 |
| Riverslea Estate (Management) Limited | Households | 1997 |
| Riverstone Rental Solutions Ltd | Real estate | 2025 |
| Riverstone Wills & Trusts Ltd | Financial services | 2025 |
| Riverview Maltings Ltd | Real estate | 2018 |
| Riviera Consulting Ltd | Professional & scientific | 2024 |
| Riviera Court Management Company Limited | Households | 1991 |
| Riviola Ventures Ltd | Information & communication | 2020 |
| Rixon Property Ltd | Real estate | 2023 |
| Riyance PVT Ltd | Construction | 2022 |
| RJ Aero-Marine (Flight Training) Limited | Professional & scientific | 2014 |
| RJ Collects Limited | Wholesale & retail | 2026 |
| RJ Construction Southern Ltd | Construction | 2021 |
| RJ Marmont Ltd | Health & social care | 2023 |
| RJACKSONMARINE24 Ltd | Manufacturing | 2025 |
| RJD Holdings Ltd | Financial services | 2019 |
| RJE Property Development Ltd | Construction | 2025 |
| RJF Engineering Consultancy Ltd | Professional & scientific | 2024 |
| Rjge Ltd | Administrative & support | 2020 |
| RJK Accountancy (UK) Ltd | Professional & scientific | 2009 |
| RJK Construction Poole Ltd | Construction | 2024 |
| RJL Coastal Ltd | Real estate | 2026 |
| RJM Properties South Ltd | Real estate | 2023 |
| Rjmbc Ltd | Professional & scientific | 2025 |
| RK Brambles Ltd | Hospitality | 2018 |
| RK Dream Home Contruction Ltd | Construction | 2025 |
| RK Resprop Investments Ltd | Real estate | 2024 |
| RKB Aesthetics Limited | Health & social care | 2019 |
| RKB Group Holdings Ltd | Financial services | 2025 |
| RKB Medical Limited | Health & social care | 2022 |
| RKB Properties Ltd | Real estate | 2025 |
| RKP Holdings Ltd | Real estate | 2021 |
| RLA Strategic Consultancy Limited | Administrative & support | 2026 |
| RLE Properties Limited | Real estate | 2021 |
| RLP Online Ltd | Administrative & support | 2016 |
| Rmac Carpentry Ltd | Construction | 2025 |
| RMC Global Trade Limited | Wholesale & retail | 2023 |
| RMC Mgmt Ltd | Real estate | 2025 |
| RMD Investments Limited | Real estate | 2009 |
| RMP Marine Limited | Administrative & support | 2012 |
| RMY Design Ltd | Professional & scientific | 2025 |
| Rnli College Limited | Hospitality | 2011 |
| Rnli DB Pension Trustee Limited | Professional & scientific | 2021 |
| Rnol Ltd | Information & communication | 2023 |
| Road Art Illustration Limited | Arts & recreation | 2019 |
| Road Skills Academy Ltd | Education | 2025 |
| Road Skills Online Ltd | Professional & scientific | 2018 |
| Roadway Assist Ltd | Transport & logistics | 2026 |
| Roam Electrical Limited | Construction | 2025 |
| Roas Media Ltd | Professional & scientific | 2024 |
| ROB Brooks Engineering Limited | Construction | 2014 |
| ROB Chalmers Limited | Information & communication | 2023 |
| ROB JOB Ltd | Construction | 2020 |
| ROB Richman Consultancy Services Limited | Professional & scientific | 2023 |
| Robbie Construction Limited | Construction | 1993 |
| Robbie Llewellyn Racing Limited | Arts & recreation | 2024 |
| Robert Braithwaite Boats Ltd | Professional & scientific | 2023 |
| Robert Christopher Investments Limited | Financial services | 2022 |
| Robert James Investments Ltd | Real estate | 2022 |
| Robertas Robertas Ltd | Professional & scientific | 2026 |
| Roberts Hayward Ltd | Real estate | 2024 |
| Roberts Manchester Ltd | Wholesale & retail | 2024 |
| Robertson Automation Engineering Ltd | Information & communication | 2013 |
| Robertson Property Investment Ltd | Real estate | 2016 |
| Robinson Corporate Services Ltd | Administrative & support | 2025 |
| Robinsons Joinery Lincoln Ltd | Manufacturing | 2015 |
| ROC & EVE Ltd | Construction | 2024 |
| Rocare Shopfitting Ltd | Extraterritorial | 2010 |
| Rochbridge Ltd | Wholesale & retail | 2023 |
| Roche Law Consultants Limited | Professional & scientific | 2004 |
| Rock and Rose Rituals Ltd | Wholesale & retail | 2023 |
| Rock Solid Enterprises Limited | Real estate | 2011 |
| Rock Solid Inc Ltd | Wholesale & retail | 2022 |
| Rock UP Gaming Ltd | Other services | 2021 |