| R.B. Porter Limited | Construction | 1964 |
| R.B. Virtual Vision Limited | Professional & scientific | 2010 |
| R.E.S. Property Letting Ltd | Hospitality | 2019 |
| R.H.F.Heating Company Limited | Construction | 1967 |
| Raasclark Ltd | Professional & scientific | 2022 |
| Race Day Partnership Limited | Other services | 2026 |
| Race With K.B. Limited | Arts & recreation | 2007 |
| Rachel Reeves Consulting Limited | Professional & scientific | 2018 |
| Racing Planet Ltd | Extraterritorial | 2013 |
| Radcliffe Pharmacy Limited | Wholesale & retail | 2006 |
| Radpharm Property Investments Limited | Real estate | 2016 |
| Radu Services Ltd | Transport & logistics | 2024 |
| RAF Electrics Limited | Construction | 2020 |
| Rafferty Renovations Limited | Construction | 2024 |
| Raft Property Lettings Limited | Real estate | 2024 |
| Raging Brum Ltd | Information & communication | 2019 |
| RAI Advertising Ltd | Information & communication | 2022 |
| Railway Steels Limited | Administrative & support | 2026 |
| Rain-Or-Shine Services Limited | Administrative & support | 2021 |
| Rainbow Cottage Limited | Hospitality | 2022 |
| Rainbow Industrial Estates Limited | Real estate | 2020 |
| Rainbow Nurseries Wordsley Limited | Education | 2011 |
| Rainbows Family Centre Ltd | Professional & scientific | 2017 |
| Raindance Music Limited | Information & communication | 2001 |
| Rainy City Limited | Arts & recreation | 2016 |
| Rajulica Ltd | Manufacturing | 2025 |
| Ramd Bars Limited | Hospitality | 2025 |
| Ramla Trading Limited | Wholesale & retail | 2026 |
| Ramona R Cleaning Limited | Administrative & support | 2026 |
| Rampur Investment Limited | Real estate | 2026 |
| Ramstone Limited | Construction | 2012 |
| Ranco Estates Limited | Real estate | 2016 |
| Rancon Civil Ltd | Construction | 2018 |
| Randall Architectural Limited | Professional & scientific | 2020 |
| Randall Group Ltd | Financial services | 2021 |
| Rapid Industrial Fasteners Limited | Manufacturing | 1984 |
| Rapide Technical Services Limited | Professional & scientific | 1987 |
| Rasul Consulting Ltd | Information & communication | 2023 |
| Raven Heavy Haulage Ltd | Transport & logistics | 2025 |
| Raven Light Haulage Ltd | Transport & logistics | 2022 |
| RAW Posterity Ltd | Construction | 2020 |
| Raymond R. Bills Limited | Extraterritorial | 1996 |
| Razak and Razak Limited | Wholesale & retail | 2012 |
| Razak Enterprises Ltd. | Hospitality | 2017 |
| RB & Sons (Property Letting) Limited | Real estate | 2010 |
| RC Cuisine Limited | Hospitality | 2022 |
| RCB Consultancy Ltd | Professional & scientific | 2014 |
| RDC Management Ltd | Extraterritorial | 2011 |
| RDL Lettings Limited | Real estate | 2018 |
| Re-Compile Limited | Information & communication | 2015 |
| Re-Signalling Limited | Construction | 2013 |
| Re:Advisory Limited | Financial services | 2020 |
| REA Valley Holdings Limited | Financial services | 2019 |
| Reaching for Change Organisation CIC | Professional & scientific | 2021 |
| Reactive Driving Recruitment Ltd | Administrative & support | 2018 |
| Reactive Recruitment Services Ltd | Administrative & support | 2020 |
| Reap Property Investments Limited | Real estate | 2019 |
| Rebel Ledger Ltd | Professional & scientific | 2025 |
| Reco CS Limited | Construction | 2026 |
| Record Culture Ltd | Wholesale & retail | 2022 |
| Recotech Limited | Water & waste | 2017 |
| Recreativity Ltd | Wholesale & retail | 2022 |
| Recursive Technologies Ltd | Information & communication | 2010 |
| Red Admiral Apartments Limited | Real estate | 2007 |
| Red Chilli Restaurant & Bar Ltd | Hospitality | 2024 |
| Red Lion Bar (Midlands) Ltd | Hospitality | 2019 |
| Red Point Ltd | Public administration | 2003 |
| Redforte Asian Cuisine Limited | Hospitality | 2008 |
| Redforte Spices Ltd | Hospitality | 2026 |
| Redhill Court Management Company Limited | Households | 1985 |
| Redhill Management Company Limited | Households | 1981 |
| Redlake Construction Ltd | Construction | 2020 |
| Redlake Orthodontics Limited | Health & social care | 2017 |
| Redrooster Properties Ltd | Construction | 2020 |
| Redstone Integration Services Ltd | Information & communication | 2022 |
| Redwheel Limited | Wholesale & retail | 2023 |
| Redwood Health Care Limited | Health & social care | 1994 |
| Redwood Heritage Holdings Limited | Financial services | 2025 |
| Reel (UK) Limited | Manufacturing | 1997 |
| Rees Smith Consultancy Limited | Professional & scientific | 2021 |
| Reesal Consultancy Limited | Health & social care | 2025 |
| Reference Locker Limited | Administrative & support | 2021 |
| Refined Loft Conversions Ltd | Construction | 2022 |
| Reform Revival Limited | Arts & recreation | 2024 |
| Regal Cabs Limited | Transport & logistics | 2014 |
| Regal Haven Homes Limited | Real estate | 2024 |
| Regalwood Developments Limited | Real estate | 2009 |
| Regen Marketing Limited | Administrative & support | 2005 |
| Regency Antiques Trading Ltd | Wholesale & retail | 2002 |
| Regency Court (Deepdale Lane) Management Company Limited | Real estate | 2005 |
| Regency Travel Ltd | Transport & logistics | 2022 |
| Regent Crest Holdings Ltd | Real estate | 2025 |
| Regents Court RTM Ltd | Hospitality | 2011 |
| Reka Holdings Ltd | Wholesale & retail | 2025 |
| REL8 Consultancy Solutions Ltd | Professional & scientific | 2019 |
| Relax and Revive Therapies Limited | Other services | 2010 |
| Relentless Events Limited | Arts & recreation | 2006 |
| Renesis Renewed Limited | Wholesale & retail | 2026 |
| Renim Ventures Limited | Real estate | 2024 |
| Renova Altus Ltd | Construction | 2025 |