| R.C.Holden & SON Limited | Extraterritorial | 1960 |
| R.E Heating and Plumbing Ltd | Construction | 2018 |
| R.J. Mullings Ltd | Education | 2026 |
| R.K. Homer (Sales & Marketing) Limited | Wholesale & retail | 2003 |
| R.N Marketing Ltd | Administrative & support | 2014 |
| R.O.B. Properties Limited | Real estate | 1996 |
| R.O.B. Supplies Limited | Wholesale & retail | 1997 |
| R.P. Publishing Limited | Professional & scientific | 1998 |
| R.S. Johnson & Sons Limited | Extraterritorial | 1946 |
| R.S.Scott(Funerals)Limited | Extraterritorial | 1951 |
| R.T.P. Crisps Limited | Wholesale & retail | 1956 |
| R3 Asset Management Limited | Construction | 2016 |
| RA Legacie Estates Ltd | Real estate | 2025 |
| RA Legacie Holdings Ltd | Financial services | 2025 |
| Rabone Park Management Company Limited | Real estate | 2002 |
| Race in Style Limited | Manufacturing | 2015 |
| Rachel Davis Consultancy Ltd | Education | 2024 |
| Rackhams Retail Ltd | Wholesale & retail | 2011 |
| Radiance Properties PVT Ltd | Real estate | 2024 |
| Radica Solutions Limited | Administrative & support | 2018 |
| Radnor Development Consulting Ltd. | Professional & scientific | 2011 |
| Rafa Transport Ltd | Transport & logistics | 2019 |
| Rafael Transport Ltd | Construction | 2015 |
| Rafi Property Investments Limited | Real estate | 2026 |
| RAG Regen Limited | Real estate | 2019 |
| Ragley Close Management Company Limited | Real estate | 2018 |
| Rahayu Prati Limited | Wholesale & retail | 2025 |
| Rahman Legal Services Limited | Professional & scientific | 2024 |
| RAI Coaches Ltd | Transport & logistics | 2017 |
| RAI Foods Ltd | Wholesale & retail | 2022 |
| Raidar Limited | Information & communication | 2025 |
| Rain and HAY Ltd | Professional & scientific | 2025 |
| Rainbow Cotton Ltd | Hospitality | 2022 |
| Rainstone Ltd | Real estate | 2019 |
| Rainworths Limited | Information & communication | 2024 |
| Rais Property Limited | Real estate | 2021 |
| Raise a Brow Ltd | Other services | 2017 |
| Raise Group International Ltd | Other services | 2019 |
| Raise Healthcare PVT Ltd | Health & social care | 2013 |
| Raise Realty Ltd | Real estate | 2020 |
| Raise Residentials Ltd | Real estate | 2022 |
| Rambunctious Realty Ltd | Real estate | 2018 |
| Ramora Group Limited | Professional & scientific | 2015 |
| Ramprad Limited | Health & social care | 2026 |
| Rampur Capital Limited | Real estate | 2020 |
| Rams Vision Ltd | Health & social care | 2022 |
| Rangetrend Limited | Professional & scientific | 1981 |
| Rapid Drop Couriers & Logistics Limited | Transport & logistics | 2024 |
| Rapid English Ltd | Information & communication | 2010 |
| RAS Corporate Services Limited | Professional & scientific | 2011 |
| Rascal Post Limited | Information & communication | 2020 |
| Rashpri Limited | Health & social care | 2022 |
| Rasindeck Limited | Professional & scientific | 1998 |
| Rathbone Hathaway Limited | Real estate | 1997 |
| Rattle and Drum Promotions Limited | Administrative & support | 2009 |
| Raut Ltd | Real estate | 2014 |
| Ravenwyn Ltd | Real estate | 2025 |
| Ravinder Kalkat Limited | Health & social care | 2015 |
| Rawfit UK Ltd | Other services | 2024 |
| RAY Tech Consultancy Ltd | Professional & scientific | 2025 |
| Raycress Property Investments Limited | Real estate | 2024 |
| Raza Locums Ltd | Health & social care | 2013 |
| RB Clinical Aesthetics Limited | Health & social care | 2026 |
| RB Fleet Solutions Ltd | Wholesale & retail | 2020 |
| RB Heating Limited | Construction | 2019 |
| RBM Medical Services Limited | Health & social care | 2010 |
| Rbox Ltd | Information & communication | 2016 |
| RC & MK Solutions Ltd | Professional & scientific | 2022 |
| RC North Limited | Construction | 2023 |
| RCB Data Ltd | Information & communication | 2023 |
| RCB Entertainment Limited | Information & communication | 2015 |
| RCD Care Limited | Health & social care | 2022 |
| RCK Building Ltd | Construction | 2021 |
| RCS Groupco Limited | Financial services | 2024 |
| RCS Holdco Limited | Financial services | 2024 |
| RCS Investco 1 Limited | Construction | 2024 |
| RCS Prop 2 Ltd | Construction | 2023 |
| RCS PROP1 Limited | Financial services | 2023 |
| RCS PROP3A Limited | Financial services | 2023 |
| RCS PROP3B Limited | Financial services | 2023 |
| RDM Business and IT Solutions Limited | Information & communication | 2002 |
| RDM Haulage Limited | Transport & logistics | 2023 |
| RDS Design Services (Bingham) Limited | Administrative & support | 2010 |
| Rdsc Ltd | Information & communication | 2015 |
| Re-Pc Limited | Professional & scientific | 2003 |
| Reach OUT: Rest, Recovery & Renewal CIC | Education | 2026 |
| Reach Project Management Limited | Construction | 2011 |
| Reach Yonder Limited | Information & communication | 2017 |
| React Physiotherapy Limited | Health & social care | 2015 |
| Reacteducation Ltd | Education | 2025 |
| Readynest Cleaning Ltd | Administrative & support | 2026 |
| Real Life Church, Sutton Coldfield | Other services | 2012 |
| Real Marketing Group Limited | Professional & scientific | 2025 |
| REAL82 Properties Limited | Real estate | 2024 |
| Really Lovely Limited | Information & communication | 2009 |
| Really Tasty Foods Ltd | Hospitality | 2022 |
| Reash-Al Limited | Construction | 2021 |
| Rebecca Jones Hair Ltd | Other services | 2024 |
| Rebecca Sabrina Nolan Ltd | Extraterritorial | 2022 |
| Reconcile Accountants Limited | Professional & scientific | 2019 |