| Rahmah Travelpoint Ltd | Administrative & support | 2018 |
| Rahman Marketing Ltd | Wholesale & retail | 2025 |
| Rahmatherapy Limited | Health & social care | 2025 |
| Rahmawati Ltd | Wholesale & retail | 2025 |
| RAI Contracts Ltd | Construction | 2024 |
| RAI Insurance Services Limited | Financial services | 2003 |
| Raian Barbers Limited | Other services | 2023 |
| Raili Toni Construction Ltd | Construction | 2026 |
| Rain Getaways Limited | Administrative & support | 2025 |
| Rain&Rew Ltd | Information & communication | 2019 |
| Rainbow Retail UK Ltd | Wholesale & retail | 2013 |
| Rainey Waldorf Landscape Designs LLP | | 2023 |
| Rain’S Nailz, Hair & Beauty Ltd | Other services | 2018 |
| Raise Your Voicee Ltd | Education | 2025 |
| RAJ Mahal Restaurant Limited | Hospitality | 2019 |
| Raja & Shah Limited | Information & communication | 2018 |
| Raja Afzal Ltd | Real estate | 2022 |
| Raja Procurement Services Ltd | Administrative & support | 2021 |
| Rajan Construction Ltd | Construction | 2025 |
| Raja’S Letnow Limited | Households | 2024 |
| Rajbengal Ltd | Hospitality | 2018 |
| Rajdo Limited | Administrative & support | 2023 |
| Rajmat Limited | Wholesale & retail | 2022 |
| Rajput Hire Ltd | Transport & logistics | 2022 |
| Rajugari Ruchulu Ltd | Wholesale & retail | 2025 |
| Rajwanshi Properties Limited | Real estate | 2022 |
| RAK (UK) Ltd | Construction | 2014 |
| RAK Property Investments Limited | Real estate | 2016 |
| RAK Solutions and Enterprises Ltd | Wholesale & retail | 2026 |
| Rak's Consultants Ltd | Administrative & support | 2019 |
| Rakboon Massage and Beauty Ltd | Other services | 2025 |
| Rakeli Ltd | Health & social care | 2014 |
| Rakin Ahmed Ltd | Information & communication | 2019 |
| Rakmira Ltd | Professional & scientific | 2009 |
| RAL2025 Limited | Real estate | 2020 |
| Raleigh Street (Nottingham) Management Company Limited | Households | 2000 |
| Rali Tech Ltd | Wholesale & retail | 2019 |
| Rally Addicts Limited | Arts & recreation | 1998 |
| RAM Renovations Ltd | Households | 2021 |
| Rama Private Limited | Health & social care | 2019 |
| Ramaiolis Ltd | Health & social care | 2020 |
| Rampage MAS Community Interest Company | Arts & recreation | 2013 |
| Ramroofing&Construction Ltd | Construction | 2026 |
| Ramsay's Catering Limited | Hospitality | 2025 |
| Ramsay's Wings N Tings Ltd | Hospitality | 2019 |
| Ramta Properties Limited | Real estate | 2024 |
| RAN Property Managment Ltd | Real estate | 2017 |
| Rana Motors Ltd | Wholesale & retail | 2019 |
| Rana&Co Ltd | Transport & logistics | 2025 |
| Ranashco Limited | Wholesale & retail | 2025 |
| Ranbir Singh Ltd | Construction | 2025 |
| Randstad CPE Limited | Administrative & support | 1976 |
| Randstad Group UK | Administrative & support | 1999 |
| Randstad HR Solutions Limited | Administrative & support | 1994 |
| Randstad Luxembourg UK Limited | Administrative & support | 2013 |
| Randstad Solutions Limited | Administrative & support | 1989 |
| Randstad Sourceright Limited | Administrative & support | 1999 |
| Randstad UK Holding Limited | Administrative & support | 1983 |
| Rangh Financial Ltd | Administrative & support | 2017 |
| Rani Fashions Ltd | Wholesale & retail | 2002 |
| Rani Store Ltd | Wholesale & retail | 2024 |
| Rani's Tiffins Limited | Hospitality | 2023 |
| Ranie Ltd | Wholesale & retail | 2026 |
| Ranim Limited | Construction | 2020 |
| Ranish Electronix Ltd | Wholesale & retail | 2024 |
| Ranishka Limited | Real estate | 2017 |
| Ranishka Property Limited | Real estate | 2021 |
| Ranjit Properties Limited | Real estate | 2016 |
| Rank Services Ltd | Transport & logistics | 2019 |
| Rank Wizard Ltd | Professional & scientific | 2024 |
| Ranorana Ltd | Wholesale & retail | 2024 |
| Ranplan Components Limited | Information & communication | 2005 |
| Ranzain Limited | Wholesale & retail | 2026 |
| Raph Driving School Ltd | Education | 2023 |
| Rapha Care Solutions Ltd | Health & social care | 2019 |
| Rapha Health Consulting Ltd | Information & communication | 2019 |
| Raphael Cleaning Limited | Administrative & support | 2025 |
| Rapid Check Ltd | Real estate | 2022 |
| Rapid Pro Logistics Ltd | Transport & logistics | 2026 |
| Rapid Relief App Ltd | Information & communication | 2023 |
| Rapid Security Group Ltd | Administrative & support | 2025 |
| Rapid Shipping Ltd | Transport & logistics | 2013 |
| Rapid Surveyors Limited | Other services | 2019 |
| Rapidly Ltd | Wholesale & retail | 2025 |
| Rapidoo Logistics & Removals Ltd | Transport & logistics | 2026 |
| Rapidrabit Ltd | Wholesale & retail | 2024 |
| Rappiddeals Limited | Wholesale & retail | 2025 |
| Rapport Creative Ltd | Professional & scientific | 2019 |
| Rare Encounters Limited | Wholesale & retail | 2026 |
| Rare Specs Ltd | Wholesale & retail | 2026 |
| Rareact Ltd | Manufacturing | 2021 |
| RAS Decors Ltd | Wholesale & retail | 2026 |
| RAS Nexus Ltd | Information & communication | 2026 |
| Rasa Management Limited | Hospitality | 2018 |
| Rasad Ltd | Wholesale & retail | 2026 |
| Rasas Business Services Limited | Information & communication | 2026 |
| Rashard Grant Courier Services Ltd | Transport & logistics | 2020 |
| Rashidpur Investments Ltd | Real estate | 2015 |
| Rasif Ltd | Construction | 2023 |
| Rasm Limited | Information & communication | 2011 |