| R&C EWI Systems Limited | Construction | 2016 |
| R&D Haulage Ltd | Transport & logistics | 2026 |
| R&D Sortation Limited | Administrative & support | 2024 |
| R&H Market Strategies Ltd | Financial services | 2025 |
| R&J Investment Group Ltd | Real estate | 2024 |
| R&K Finance Limited | Professional & scientific | 2022 |
| R&K Living Limited | Real estate | 2023 |
| R&L Drive Ltd | Transport & logistics | 2021 |
| R&P Food International Ltd | Wholesale & retail | 2026 |
| R&R Data Managed Services Limited | Information & communication | 2004 |
| R&R Fashion Limited | Manufacturing | 2022 |
| R&S Activity Limited | Professional & scientific | 2013 |
| R&Tt Ltd | Transport & logistics | 2022 |
| R'Dam International Ltd | Wholesale & retail | 2020 |
| R-Agile Ltd | Construction | 2023 |
| R-Line Automotive Ltd | Wholesale & retail | 2023 |
| R-Logics Solutions Limited | Information & communication | 2012 |
| R-Secure Ltd | Construction | 2025 |
| R.A.D Investment Group Ltd | Real estate | 2023 |
| R.C.W.Steel Limited | Manufacturing | 2018 |
| R.Delight Limited | Hospitality | 2010 |
| R.Dersidan Ltd | Transport & logistics | 2024 |
| R.G. Consulting ( UK ) Limited | Professional & scientific | 2008 |
| R.G.T.& S.(Poultry)Limited | Wholesale & retail | 1964 |
| R.J.C. Transport Limited | Extraterritorial | 1985 |
| R.J.Stearn Limited | Construction | 1944 |
| R.M.S. Decoration Limited | Construction | 2004 |
| R.O.W. Distribution Limited | Other services | 1980 |
| R.Z. Auditing Limited | Administrative & support | 2026 |
| R10 Consultancy Ltd | Professional & scientific | 2025 |
| R2G Developments Limited | Real estate | 2020 |
| R2G Investments Ltd | Real estate | 2017 |
| R2G Legacy Limited | Real estate | 2018 |
| R2G Pearce Limited | Real estate | 2023 |
| R2GHERA Ltd. | Professional & scientific | 2015 |
| R2M Drinks Ltd | Professional & scientific | 2013 |
| R2R Holdings Limited | Other services | 2005 |
| R2R Investments Ltd. | Real estate | 2009 |
| R3 Road Risk Reduction Ltd | Arts & recreation | 2014 |
| R3G Limited | Real estate | 2026 |
| R6 Hybrid Limited | Wholesale & retail | 2023 |
| R8 Cars Ltd | Wholesale & retail | 2022 |
| R:Enter Business Solutions Ltd | Administrative & support | 2023 |
| RA Systems Ltd | Information & communication | 2022 |
| Raan Advisory Group Ltd | Financial services | 2018 |
| Raanj Engineering Services Ltd | Professional & scientific | 2025 |
| Raas Global Ltd | Administrative & support | 2024 |
| RAB & JAB Ltd | Financial services | 2022 |
| RAB Ltd | Real estate | 2008 |
| Rabbani C'S Ltd | Education | 2025 |
| Rabenjak & Co Ltd | Wholesale & retail | 2020 |
| Rabiha & Fatiha Ltd | Real estate | 2020 |
| Racdee Consultancy Limited | Information & communication | 2022 |
| Race Red Limited | Information & communication | 2016 |
| Race Reflections Ltd | Other services | 2020 |
| Race X Race Ltd | Wholesale & retail | 2025 |
| Racebolt Limited | Manufacturing | 2013 |
| Racecloud Ltd | Information & communication | 2023 |
| Rachael Crane Ltd | Other services | 2020 |
| Rachdave Ltd | Other services | 2013 |
| Rachdave Properties Ltd | Real estate | 2020 |
| Rachel Jones Interiors Limited | Professional & scientific | 2017 |
| Racing Line Events Limited | Professional & scientific | 2000 |
| Racing Line Limited | Wholesale & retail | 1998 |
| Racingline Performance Ltd | Wholesale & retail | 2011 |
| RAD Clinics Limited | Health & social care | 2015 |
| RAD Finkorp UK Ltd | Information & communication | 2019 |
| RAD Fire and Security Ltd | Administrative & support | 2022 |
| RAD Ventures Ltd | Professional & scientific | 2020 |
| Radac GH Limited | Health & social care | 2021 |
| Radcliffe Street Limited | Real estate | 2015 |
| Radcliffe Ventures Limited | Administrative & support | 2026 |
| Radha Spirit Ltd | Real estate | 2021 |
| Radhasai Mmaacc UK Limited | Education | 2021 |
| Radhey Logistics Ltd | Transport & logistics | 2025 |
| Radial Ventures Ltd | Financial services | 2024 |
| Radiance Eco Ltd | Construction | 2023 |
| Radiant Peak Renewables Limited | Construction | 2025 |
| Radiant Wellness Studio Ltd | Hospitality | 2026 |
| Radiatec Ltd | Other services | 2024 |
| Radical Edge Ltd | Professional & scientific | 2010 |
| Radical Resin & Flooring Ltd | Wholesale & retail | 2025 |
| Radice Enterprise Limited | Wholesale & retail | 2013 |
| Radice Surveyors Limited | Professional & scientific | 2022 |
| Radicle Thinking Ltd | Professional & scientific | 2019 |
| Radiosmith Limited | Manufacturing | 2009 |
| Radir Limited | Wholesale & retail | 2002 |
| Radley Limited | Financial services | 2021 |
| Radleys Pet Styling Ltd | Other services | 2026 |
| Radnor Auto Ltd | Manufacturing | 2023 |
| Radstech Ltd | Health & social care | 2023 |
| Radstock Electrical and Plumbing Ltd | Construction | 2021 |
| Radstone Fields Local Centre Management Company Limited | Construction | 2021 |
| Raecore Ltd | Arts & recreation | 2024 |
| Raenoch Support Ltd | Real estate | 2025 |
| Raffas Solutions Limited | Construction | 2022 |
| Rafiki Springs Enterprise Limited | Hospitality | 2016 |
| Rafiuddin Holdings Ltd | Real estate | 2025 |
| Rafmik Connect Ltd | Manufacturing | 2024 |
| RAG Project Management Limited | Administrative & support | 2017 |