| Rana Impex Ltd | Wholesale & retail | 2025 |
| Rana Management Services Ltd | Wholesale & retail | 2026 |
| Rana Trade Direct Limited | Wholesale & retail | 2015 |
| Ranaissance Care Ltd | Health & social care | 2016 |
| Rancha Ltd | Education | 2022 |
| Rand Assets Limited | Hospitality | 2016 |
| Rand Technology (Europe) Limited | Other services | 2001 |
| Randall and James Financial Services Ltd | Financial services | 2022 |
| Randall Properties Limited | Real estate | 2000 |
| Randall UK Holdings Limited | Financial services | 2025 |
| Random Blcok Ltd | Wholesale & retail | 2021 |
| Random Thoughts in Hair Limited | Other services | 2025 |
| Random Walk Consulting Ltd | Professional & scientific | 2026 |
| Random Wonders Press Ltd | Information & communication | 2018 |
| Randot Ltd | Professional & scientific | 2013 |
| Randy Rentals Ltd | Administrative & support | 2020 |
| Randy Veyron Limited | Wholesale & retail | 2021 |
| Randy’S Coffee Ltd | Manufacturing | 2025 |
| Randzify Ltd | Financial services | 2025 |
| Ranees Property Services Ltd | Real estate | 2019 |
| Ranes C Ltd | Wholesale & retail | 2025 |
| Rangers HUT Ltd | Hospitality | 2022 |
| Ranimaj Limited | Construction | 2025 |
| Raniq Ltd | Wholesale & retail | 2025 |
| Ranj the Urban Chocolatier Bristol Limited | Hospitality | 2023 |
| Ranjeet SINGH1 Ltd | Construction | 2024 |
| Ranjha Global Ltd | Wholesale & retail | 2024 |
| Ranjodh SINGH1 Ltd | Construction | 2025 |
| Rank Switchers Ltd | Information & communication | 2025 |
| Rankin Branding Limited | Wholesale & retail | 2012 |
| Rankstart Investments Limited | Financial services | 2019 |
| Rankyx Ltd | Information & communication | 2025 |
| Ransbury Ltd | Wholesale & retail | 2022 |
| Ranson Plumbing and Heating Engineering Limited | | 1970 |
| Rantex Business PC | | 2016 |
| Ranuras Global Ltd | Wholesale & retail | 2025 |
| Ranu’S Imports Ltd | Wholesale & retail | 2025 |
| Ranyya Ltd | Hospitality | 2025 |
| RAO Construction Services Limited | Construction | 2024 |
| Raool Animations Ltd | Wholesale & retail | 2026 |
| RAP Actuary Limited | Financial services | 2021 |
| RAP Fugeservice Ltd | Construction | 2025 |
| RAP Motor Factors Limited | Wholesale & retail | 2021 |
| Raph's Selection Ltd | Wholesale & retail | 2024 |
| Raphaelle Limited | Information & communication | 2012 |
| Raphaonlinebloodtests Ltd | Health & social care | 2019 |
| Raphealshizan Limited | Administrative & support | 2018 |
| Rapid Body Repair Ltd | Wholesale & retail | 2024 |
| Rapid Building Supplies Ltd | Wholesale & retail | 2022 |
| Rapid Cardiff Limited | Real estate | 2022 |
| Rapid Emergency Ltd | Construction | 2026 |
| Rapid FIX Plumbers Ltd | Construction | 2025 |
| Rapid Group Holdings Limited | Wholesale & retail | 1980 |
| Rapid Maintenance Cardiff Ltd | Construction | 2025 |
| Rapid Property Investments Limited | Other services | 2008 |
| Rapid Rail International Limited | Manufacturing | 2003 |
| Rapid Reports (Properties) Ltd | Real estate | 2021 |
| Rapid Reports Limited | Health & social care | 2015 |
| Rapid Response Security Ltd | Financial services | 2019 |
| Rapidgrowuk Limited | Wholesale & retail | 2025 |
| Rapis Property Ltd | Real estate | 2026 |
| Rapiz Neatnest Limited | Administrative & support | 2026 |
| Rapport Company of Clockmakers Ltd.(The) | Wholesale & retail | 1965 |
| Rapport of London Ltd. | Wholesale & retail | 1943 |
| Raptor Hydraulics Limited | Professional & scientific | 2016 |
| Rare Pear Limited | Wholesale & retail | 2020 |
| Rare Pull Vault Limited | Wholesale & retail | 2026 |
| Raretel Ltd | Administrative & support | 2018 |
| Raro Construct LLP | | 2019 |
| RAS Property and Real Estate Limited | Real estate | 2022 |
| Rasa International Ltd | Administrative & support | 2026 |
| Rasa Vighna Grill PVT Ltd | Hospitality | 2024 |
| Rasg Ltd | Health & social care | 2025 |
| Rashada Company for General Trading and Supplies and Import and Export and Land Reclamation Ltd | Wholesale & retail | 2024 |
| Rashed's Healthcare Limited | Health & social care | 2019 |
| Rashid and Family LLP | | 2025 |
| Rashpal Ltd | Wholesale & retail | 2020 |
| Rasio Cudd (Cudd Racing) Limited | Hospitality | 2025 |
| Rasorce Limited | Professional & scientific | 2023 |
| Raspala Limited | Administrative & support | 2022 |
| Rasr Investment (UK) Limited | Real estate | 2016 |
| Rassam Properties Ltd | Real estate | 2022 |
| Rassau Grid Services Holding Company Limited | Energy | 2020 |
| Rastbun Ltd | Wholesale & retail | 2025 |
| Rasul Eyecare Ltd | Health & social care | 2009 |
| RAT Magic Games Ltd | Information & communication | 2023 |
| Ratchets and Ropes Limited | Transport & logistics | 2002 |
| Ratel Mart Ltd | Wholesale & retail | 2025 |
| Rateswitch Ltd | Information & communication | 2016 |
| Rathath Darbat Comprehensive for Engineering Consultations Ltd | Professional & scientific | 2025 |
| Rathiel TAP Ltd | Administrative & support | 2016 |
| Rathlidge Corporation Limited | Professional & scientific | 2005 |
| Ratma Contractors Ltd | Construction | 2018 |
| Raval Investments Limited | Real estate | 2025 |
| Ravaver Ltd | Wholesale & retail | 2025 |
| Raven ADS Ltd | Professional & scientific | 2023 |
| Raven Plumbing & Heating Limited | Construction | 2022 |
| Ravenlake Promotions Limited | Administrative & support | 1992 |
| Ravensbourne Crescent 1960 Limited | Extraterritorial | 2014 |
| Ravensdale Compliance Consulting Limited | Professional & scientific | 2021 |