| RAD & Aubert Properties Ltd | Real estate | 2020 |
| RAD - Tech Precision Ltd | Information & communication | 2026 |
| RAD Medical Ltd | Health & social care | 2024 |
| RAD Multisolutions Ltd | Manufacturing | 2024 |
| RAD Properbiz Ltd | Real estate | 2019 |
| Radam IT Consultancy Limited | Information & communication | 2015 |
| Radamon Ukeig | | 2013 |
| Radcliffe & Co (Life & Pensions) Limited | Financial services | 1987 |
| Radcliffe and Newlands Holding One Limited | Financial services | 2024 |
| Radcliffe and Newlands Mortgages Limited | Financial services | 2023 |
| Radcliffe Asset Management Limited | Financial services | 2019 |
| Raddleman Limited | Professional & scientific | 2015 |
| Raddleman Media Limited | Professional & scientific | 2018 |
| Radev Trans Ltd | Transport & logistics | 2017 |
| Radiance by Zubia Limited | Other services | 2025 |
| Radiant Coding Limited | Administrative & support | 2018 |
| Radiant GAS Services Ltd | Construction | 2020 |
| Radiate Developments (Godalming) Limited | Real estate | 2022 |
| Radiate Developments (Weybridge) Limited | Construction | 2021 |
| Radiate Developments Ltd | Construction | 2014 |
| Radically Innovative Solutions Ltd | Professional & scientific | 2019 |
| Radio Cars Winchester Limited | Transport & logistics | 2025 |
| Radio Tactics Group Ltd | Information & communication | 2013 |
| Radio Taxi (Winchester) Limited | Transport & logistics | 2007 |
| Radio Taxis (Southampton) Limited | Transport & logistics | 1984 |
| Radio Taxis (Winchester) Limited | Transport & logistics | 2007 |
| Radio Taxis Limited | Transport & logistics | 2021 |
| Radium Limited | Professional & scientific | 1998 |
| Radius Lift Services Ltd | Professional & scientific | 2025 |
| Radkiewicz Ltd | Hospitality | 2016 |
| Radm Properties Ltd | Real estate | 2018 |
| RADO1 Ltd | Manufacturing | 2018 |
| Radoslav Ltd | Transport & logistics | 2025 |
| Radstock Electrical Ltd | Construction | 2024 |
| RADU88 Transport Ltd | Transport & logistics | 2021 |
| Raf.Ili Ltd | Health & social care | 2022 |
| Rafal Zalewski Ltd | Construction | 2017 |
| Raffael Catering Company Ltd | Hospitality | 2014 |
| Rafique Stores Limited | Hospitality | 2019 |
| Rafnar UK Limited | Manufacturing | 2019 |
| Rafyc Holdings Limited | Other services | 2008 |
| Rafyc Trading Limited | Other services | 2007 |
| Ragamuffin Limited | Hospitality | 2015 |
| Ragbir Kaur Limited | Households | 2022 |
| Raglington Farm Limited | Agriculture & fishing | 1950 |
| Raha Consultancy Limited | Professional & scientific | 2024 |
| Rahat Tariq Ltd | Wholesale & retail | 2025 |
| Rahmah Tours Ltd | Administrative & support | 2025 |
| Rahmah Travels & Tours Ltd | Administrative & support | 2025 |
| Rahman Properties Ltd | Real estate | 2016 |
| RAI Estates Ltd | Real estate | 2011 |
| RAI Lettings (UK) Ltd | Real estate | 2016 |
| Raidamart Ltd | Wholesale & retail | 2025 |
| Railook Limited | Wholesale & retail | 2009 |
| Rain and Sun Ltd | Manufacturing | 2004 |
| Rainam Ltd | Wholesale & retail | 2026 |
| Rainarc Limited | Wholesale & retail | 2022 |
| Rainbow 886 Limited | Hospitality | 2025 |
| Rainbow Educational Psychology Ltd | Education | 2024 |
| Rainbow Flats Ltd | Real estate | 2025 |
| Rainbow Hands Respite and Childcare Services Ltd | Health & social care | 2025 |
| Rainbow Kebab Limited | Hospitality | 2018 |
| Rainbow Medicine Circle Limited | Education | 2015 |
| Rainbow Sales Limited | Other services | 1995 |
| Rainha Fightwear Ltd | Wholesale & retail | 2015 |
| Rainmaker Sales Success Limited | Administrative & support | 2025 |
| Rainy Daze Games Limited | Information & communication | 2026 |
| Raise Education Trust | Education | 2011 |
| Raiseap Ltd | Education | 2025 |
| Raith Medical Limited | Health & social care | 2022 |
| RAJ Composites Ltd | Manufacturing | 2021 |
| Rajbuyshouses Ltd | Real estate | 2022 |
| RAK Technical Limited | Construction | 2011 |
| Rakiro Consulting International LLP | | 2005 |
| Ralph Crump Accountants Limited | Professional & scientific | 2003 |
| Ralph PUB Limited | Arts & recreation | 2019 |
| RAM Building Projects Limited | Construction | 2025 |
| RAM Recycling Limited | Water & waste | 2005 |
| RAM Sales Consultancy Ltd | Professional & scientific | 2026 |
| RAM Spedition Ltd | Transport & logistics | 2025 |
| Ramani Ecommerce Ltd | Wholesale & retail | 2024 |
| Ramblings Limited | Administrative & support | 2005 |
| Rambo Media Ltd | Administrative & support | 2026 |
| Ramgarhia Limited | Wholesale & retail | 2026 |
| Ramino Invest Ltd | Extraterritorial | 2015 |
| Ramona (PVT) Ltd | Health & social care | 2017 |
| Ramparts & Light Limited | Information & communication | 2025 |
| Rampserv Ltd | Wholesale & retail | 2024 |
| Rampton Sound Solutions Ltd | Manufacturing | 2022 |
| Ramsay Property Maintenance Limited | Construction | 2023 |
| Ramshorn Design Limited | Professional & scientific | 2013 |
| Ranch Productions Limited | Information & communication | 2008 |
| Randhawa Brothers Ltd | Wholesale & retail | 2026 |
| Randhawa Capital Investments Ltd | Real estate | 2024 |
| Randi Hotels Limited | Hospitality | 2011 |
| Randromet Retail Services Ltd | Wholesale & retail | 2025 |
| Randyotter Limited | Arts & recreation | 2015 |
| Ranelagh Court (Abbotswick) Limited | Households | 1996 |
| Range Fish and Food Ltd | Hospitality | 2025 |
| Ranger OV RTM Limited | Households | 2025 |