| Reedswood Investments Limited | Real estate | 2018 |
| Reedy Creek Investments Ltd | Real estate | 2024 |
| Reehal Plumbing and Heating Limited | Construction | 2020 |
| Refresh Installations Ltd | Construction | 2023 |
| REG Investments Limited | Professional & scientific | 2019 |
| Regalhill Limited | Professional & scientific | 2018 |
| Regency Global Equity Limited | Financial services | 2017 |
| Reggin (Midlands) Ltd | Wholesale & retail | 1989 |
| Regis Fire and Security Limited | Public administration | 2025 |
| Regis Fire Protection Limited | Wholesale & retail | 1988 |
| Reiss Homes Ltd | Extraterritorial | 2024 |
| Rekhi Hair & Beauty Ltd | Other services | 2022 |
| Rekhi Transport Ltd | Arts & recreation | 2019 |
| Relm Techinologies (PVT) Ltd | Administrative & support | 2021 |
| Remapd Limited | Wholesale & retail | 2017 |
| Remedialsuk Ltd | Construction | 2019 |
| Rennova Construction Ltd | Construction | 2024 |
| Resi Waste OIL Ltd | Water & waste | 2017 |
| Resolute Wealth Management Holdings Limited | Financial services | 2015 |
| Restify Ltd | Hospitality | 2024 |
| Restorer Christian Centre | Administrative & support | 2005 |
| Resy Holdings Limited | Financial services | 2026 |
| Revival Transport Ltd | Transport & logistics | 2025 |
| Revive Air Ltd | Manufacturing | 2023 |
| Revive by NJ Ltd | Health & social care | 2025 |
| Reyan Ventures Ltd | Real estate | 2023 |
| RF Garage Ltd | Wholesale & retail | 2026 |
| RGM Health Ltd | Health & social care | 2016 |
| RGN Healthcare Limited | Health & social care | 2023 |
| RH Goalkeeping Limited | Manufacturing | 2026 |
| Rhino Investments International Ltd | Real estate | 2016 |
| Rhino Properties and Lettings Ltd | Real estate | 2018 |
| Rhodia Pinax Limited | Professional & scientific | 1910 |
| RHR Brothers Limited | Transport & logistics | 2024 |
| RI Engineering Limited | Professional & scientific | 2013 |
| RI Nails Ltd | Other services | 2025 |
| Rialto Pizzeria Limited | Hospitality | 2026 |
| Riar Expresswheels Ltd | Transport & logistics | 2024 |
| Riazmeen Holdings Ltd | Financial services | 2023 |
| Rich Gully Ltd | Wholesale & retail | 2020 |
| Richardson Barberry Forrest Park Limited | Construction | 2019 |
| Richardson Barberry Rugby Limited | Construction | 2024 |
| Richardson Capital Limited | Extraterritorial | 2007 |
| Richardson Developments Limited | Extraterritorial | 1993 |
| Richardson Enterprises Limited | Extraterritorial | 2017 |
| Richardson Investments Salzburg I LLP | | 2004 |
| Richardson Management LLP | | 2002 |
| Richardson Properties Limited | Extraterritorial | 1995 |
| Richardson Rugby Limited | Financial services | 2024 |
| Richardsons Developments Limited | Extraterritorial | 1968 |
| Ricky Masih Ltd | Other services | 2024 |
| Riclantic Finance UK Limited | Financial services | 2025 |
| Ride My TUK TUK Ltd | Professional & scientific | 2017 |
| Right Hand Deals Ltd | Administrative & support | 2024 |
| Rising Communities CIC | Information & communication | 2026 |
| Ritz Kamat Limited | Professional & scientific | 2022 |
| RJ Vantage Group Ltd | Other services | 2025 |
| RK Dynamic Support Limited | Health & social care | 2021 |
| RK Electrical Contractor Ltd | Construction | 2026 |
| RK Exec Ltd | Transport & logistics | 2026 |
| RK Halal Meat UK Ltd | Wholesale & retail | 2023 |
| RK Plumb-Gas Ltd | Construction | 2018 |
| RK Properties (Midlands) Ltd | Real estate | 2025 |
| RK1 Properties Ltd | Real estate | 2024 |
| RKP Services Ltd | Health & social care | 2023 |
| RL Advisory Services Limited | Financial services | 2025 |
| RM Collaborate Consulting Ltd | Administrative & support | 2019 |
| RM Sandhu Couriers Ltd | Transport & logistics | 2022 |
| RNS Services Ltd | Administrative & support | 2024 |
| Road Warriors Logistics Ltd | Transport & logistics | 2025 |
| Roadstorm Logistics Ltd | Transport & logistics | 2023 |
| ROB Lukas Ltd | Transport & logistics | 2022 |
| Robert Dylan Ltd | Wholesale & retail | 2023 |
| Roberts M Limited | Wholesale & retail | 2023 |
| Robertson D Limited | Wholesale & retail | 2016 |
| Robson L Limited | Wholesale & retail | 2025 |
| Robust Care International Ltd | Wholesale & retail | 2018 |
| Rocko Park Limited | Other services | 2025 |
| ROM Consulting Services Ltd | Administrative & support | 2024 |
| Rood END Road Halal Meat Centre Ltd | Wholesale & retail | 2024 |
| Rood END Valeting & Tyers Ltd | Administrative & support | 2022 |
| Roofing & Cladding Limited | Construction | 2006 |
| Roofing Services Limited | Professional & scientific | 2005 |
| Rorton Limited | Real estate | 2019 |
| Rose of Sharon Care Services Limited | Health & social care | 2010 |
| Ross Paper Limited | Real estate | 1967 |
| Rotala Group Ltd | Transport & logistics | 2023 |
| Rotala Limited | Transport & logistics | 2005 |
| Rotala Shared Services Limited | Transport & logistics | 2001 |
| Rotarry Construction Ltd | Construction | 2023 |
| Roundhill Residential Ltd | Real estate | 2026 |
| Rounds Green Motor Services Ltd | Wholesale & retail | 2020 |
| Roversxpress Limited | Wholesale & retail | 2025 |
| Rowelec Holdings Limited | Financial services | 2019 |
| Rowelec Limited | Construction | 2002 |
| Rowley Accountants Limited | Professional & scientific | 2025 |
| Rowley Regis Property Management Ltd | Real estate | 2022 |
| Royalcraft Limited | Wholesale & retail | 1990 |
| Royale Graphics and Print Ltd | Manufacturing | 2026 |
| RP Food Services Limited | Hospitality | 2024 |