| RA Enterprise 2022 Ltd | Hospitality | 2022 |
| RA EYE Care Ltd | Health & social care | 2025 |
| RA Household UK Ltd | Wholesale & retail | 2025 |
| RA Motors (Bolton) Ltd | Wholesale & retail | 2024 |
| RA Technical Ltd | Manufacturing | 2018 |
| RA Travel Ltd | Transport & logistics | 2021 |
| Raada Ltd. | Wholesale & retail | 2022 |
| Raapp - Empower CIC | Public administration | 2023 |
| RAAS4158 Ltd | Wholesale & retail | 2026 |
| Raaz Builders Ltd | Construction | 2025 |
| Raaziq International Limited | Transport & logistics | 2024 |
| Rabia Amin Ltd | Wholesale & retail | 2023 |
| Raccoons Build Limited | Information & communication | 2024 |
| Rachael Friend Photography Limited | Professional & scientific | 2025 |
| Rachel FOY Media Group Ltd | Education | 2019 |
| Rachel Hanberry Yoga Limited | Education | 2019 |
| Rachel Shorter Plumbing & Heating Limited | Construction | 2018 |
| Rachel Smoker Fund Documentation Limited | Administrative & support | 2013 |
| Rachel's Nails Ltd | Other services | 2017 |
| RAD Excellence Ltd | Health & social care | 2014 |
| RAD EYE Invest Ltd | Real estate | 2024 |
| RAD EYE Ltd | Other services | 2022 |
| RAD Floors Ltd | Construction | 2014 |
| RAD Hammock Ltd | Information & communication | 2019 |
| RAD Image Limited | Health & social care | 2020 |
| RAD International Ltd | Wholesale & retail | 2015 |
| RAD Legal Limited | Professional & scientific | 2019 |
| RAD Properties Group Ltd | Real estate | 2022 |
| RADI8 Industries Limited | Wholesale & retail | 2019 |
| Radiant Medical Aesthetics Limited | Health & social care | 2024 |
| Radical Radiance Limited | Health & social care | 2025 |
| Radicasphinx Ltd | Wholesale & retail | 2019 |
| Radis Build Ltd | Construction | 2016 |
| Radius Property Services Limited | Real estate | 2008 |
| Radmore Architecture Services Limited | Information & communication | 2022 |
| Radwantrans Ltd | Transport & logistics | 2026 |
| Radworth Electrical Ltd | Construction | 2012 |
| RAE Deliveries Limited | Transport & logistics | 2023 |
| Rafiki Asset Management Limited | Financial services | 2025 |
| Rage Services Limited | Health & social care | 2025 |
| Raghuveer Properties Ltd | Real estate | 2023 |
| Raging Bull Sportswear Ltd | Extraterritorial | 2009 |
| RAH Motors Ltd | Wholesale & retail | 2022 |
| Raheemtrading Ltd | Wholesale & retail | 2025 |
| Rahmaan Housing Limited | Real estate | 2023 |
| Rahman Financial Services Limited | Professional & scientific | 2012 |
| Rahmar Holdings Ltd | Financial services | 2026 |
| RAI Health Ltd | Health & social care | 2015 |
| RAI Properties Limited | Real estate | 2017 |
| Raikes Clough Limited | Real estate | 2024 |
| Rail Infra Clean Ltd | Administrative & support | 2024 |
| Rail Travel Centre LLP | | 2021 |
| Railway BX Limited | Hospitality | 2023 |
| Railway Motors Limited | Wholesale & retail | 2011 |
| Raimondos Pizza Limited | Hospitality | 2012 |
| Rain Engineering Limited | Professional & scientific | 2000 |
| Rainbow Bridge Pet Crematorium Ltd | Water & waste | 2025 |
| Rainbow Bridge Pet Euthanasia Ltd | Other services | 2026 |
| Rainbow Clothing and Embroidery Limited | Manufacturing | 2013 |
| Rainbow Healthcare Ltd | Health & social care | 2004 |
| Rainbow Kite Project Ltd | Education | 2024 |
| Rainbowynn Ltd | Administrative & support | 2019 |
| Raindeer Security & Cleaning Services Ltd | Administrative & support | 2011 |
| Rainmuch Ltd | Financial services | 2009 |
| Rainshaw Convenience Store Limited | Wholesale & retail | 2023 |
| Raipharm Limited | Health & social care | 2015 |
| Raise Education & Wellbeing Ltd | Education | 2018 |
| RAJ Indian Takeaway Limited | Hospitality | 2019 |
| Raja Constructions Limited | Construction | 2026 |
| Raja Courier Ltd | Transport & logistics | 2025 |
| Rajpoot Traders International Limited | Wholesale & retail | 2023 |
| RAK Data Science Limited | Information & communication | 2020 |
| Rake IT Easy Ltd | Administrative & support | 2026 |
| Rakewood Capital Ltd | Real estate | 2025 |
| RAM Narayan Traders Ltd | Professional & scientific | 2023 |
| RAM P2P Consulting Ltd | Information & communication | 2015 |
| RAM Pro Limited | Construction | 2016 |
| Ramaiya Properties Limited | Real estate | 2023 |
| Ramiro's Mini Market Ltd | Wholesale & retail | 2017 |
| Rams Joinery Ltd | Construction | 2026 |
| Ramsay Contractors Limited | Construction | 2007 |
| Ramsbottom Cycles Limited | Wholesale & retail | 2008 |
| Ramsden Holdings Ltd | Financial services | 2021 |
| Ramsey Hill Limited | Wholesale & retail | 2024 |
| Ramwells Court Management Company Limited | Households | 1995 |
| Ramzy Brothers Ltd | Hospitality | 2025 |
| Rana Driving School Ltd | Education | 2021 |
| Rana Fresh Foods Ltd | Wholesale & retail | 2026 |
| Rana Frozen Foods Ltd | Wholesale & retail | 2022 |
| Rana Zain Foods Ltd | Hospitality | 2025 |
| Ranacrest Limited | | 1988 |
| Ranascloset Limited | Wholesale & retail | 2025 |
| Randd UK Limited | Professional & scientific | 2008 |
| Randworth Ltd | Real estate | 2023 |
| Ranganath Limited | Health & social care | 2016 |
| Ranggo Limited | Transport & logistics | 2025 |
| Rani by Raja Limited | Wholesale & retail | 2017 |
| Ranjha Ltd | Transport & logistics | 2022 |
| Rank High Digital Ltd | Professional & scientific | 2024 |
| Rankra Ltd | Professional & scientific | 2025 |