| Rachita and Santosh Ltd | Real estate | 2025 |
| Racingard Motorsport Limited | Wholesale & retail | 2016 |
| RAD KM Limited | Construction | 2012 |
| Radha Rani PVT Ltd | Hospitality | 2024 |
| Radhika Limited | Real estate | 2026 |
| Radial Landscapes Limited | Construction | 2019 |
| Radio Crawsham CIC | Information & communication | 2026 |
| Radiometer Limited | Manufacturing | 1991 |
| Rafa Services Ltd | Transport & logistics | 2022 |
| Raffle Feathers Ltd | Wholesale & retail | 2025 |
| Raghav Property Limited | Real estate | 2026 |
| Raha Developers Ltd | Real estate | 2024 |
| Raha Therapy Ltd | Administrative & support | 2024 |
| Railway Construction Services Ltd | Construction | 2025 |
| RAINAN09 Ltd | Health & social care | 2023 |
| Rainbo Procurement Solutions Ltd | Wholesale & retail | 2022 |
| Rainbo Supplies & Services Limited | Wholesale & retail | 1994 |
| Rainmasters Limited | Construction | 1996 |
| Raise Holiday Cottage Ltd | Hospitality | 2020 |
| Rajah House Ltd | Wholesale & retail | 2023 |
| Rajah Retail Ltd | Wholesale & retail | 2024 |
| Rakellyelectrical Ltd | Construction | 2022 |
| Raleigh Court (Discovery Park) Limited | Real estate | 1990 |
| RAO Travels Ltd | Transport & logistics | 2017 |
| Rapid Washrooms Limited | Manufacturing | 2016 |
| Rapidcare Medical Limited | Wholesale & retail | 2013 |
| Rapidroofingexperts Ltd | Construction | 2025 |
| Rare Impact Care Services Ltd | Health & social care | 2024 |
| Rascal Cleaning Services Limited | Administrative & support | 2006 |
| RAT & Monkey Property Ltd | Real estate | 2021 |
| Rathborne & Roche Limited | Professional & scientific | 1999 |
| Rathium Advisory Ltd | Construction | 2026 |
| Ravensdale Asset Advisors Limited | Professional & scientific | 2025 |
| Rawlingsr LLP | | 2017 |
| Rawzone Ltd | Wholesale & retail | 2022 |
| RAY Barbers Limited | Other services | 2022 |
| RAY Kleaning Services Ltd | Administrative & support | 2022 |
| Rayr Group Ltd | Other services | 2025 |
| Rayyan Hussain Ltd | Extraterritorial | 2024 |
| RAZ Freight Transport Limited | Transport & logistics | 2017 |
| RAZ Shop Ltd | Wholesale & retail | 2026 |
| Razor Labs Ltd | Information & communication | 2025 |
| RBW Consulting Group Limited | Administrative & support | 2020 |
| RBW Consulting Limited | Administrative & support | 2007 |
| RBX Golf Ltd | Wholesale & retail | 2018 |
| RD CNC & Laser Services Ltd | Manufacturing | 2026 |
| RD Petroleum Limited | Wholesale & retail | 2025 |
| RD Pubs Ltd | Hospitality | 2019 |
| RDC Wholesalers Ltd | Wholesale & retail | 2021 |
| RDI Comms Ltd | Construction | 2022 |
| Rdjw Architects Limited | Professional & scientific | 1992 |
| Rdjw Limited | Professional & scientific | 2006 |
| REA Landscaping Services Ltd | Construction | 2024 |
| Reach Business Management Consultants Limited | Administrative & support | 2013 |
| Reach Solutions Limited | Professional & scientific | 2001 |
| Reaching OUT to ALL CIC | Health & social care | 2020 |
| REACHOUT24 Healthcare Ltd | Health & social care | 2022 |
| Reading Rabbits Ltd | Education | 2018 |
| Ready to Go Legal Limited | Professional & scientific | 2017 |
| Reakke Ltd | Health & social care | 2015 |
| Real Estate Law Limited | Professional & scientific | 2007 |
| Real Life Consulting UK Limited | Professional & scientific | 2023 |
| Real Talent Coaching & Consulting Limited | Professional & scientific | 2024 |
| Rebalance Therapies Ltd | Extraterritorial | 2023 |
| Recruitment Consultants Group Limited | Administrative & support | 2023 |
| Recsel International Limited | Administrative & support | 2005 |
| Recti-Fly Ltd | Administrative & support | 2023 |
| RECYCLE2TRADE Ltd | Information & communication | 2014 |
| Red Barracuda Holdings Limited | Professional & scientific | 2011 |
| Red Bridge Market Entry Ltd | Professional & scientific | 2025 |
| Red FOX Delta Ltd | Transport & logistics | 2015 |
| Red Green Blue Graphics Limited | Administrative & support | 2015 |
| Red Periperi Crawley Ltd | Hospitality | 2017 |
| Red River Country Park Limited | Hospitality | 2017 |
| Red ROK Developments Ltd | Construction | 2025 |
| Red Sail Design Limited | Professional & scientific | 1996 |
| Redcoat Express Limited | Wholesale & retail | 1978 |
| Redcoat Limited | Professional & scientific | 1996 |
| Reddways Limited | Wholesale & retail | 2014 |
| Redhill Care Ltd | Health & social care | 2026 |
| Redhill Property Services Limited | Real estate | 1997 |
| Redlane Construction Limited | Construction | 2018 |
| Redstart Training Limited | Professional & scientific | 2025 |
| Redstone Accountants Limited | Professional & scientific | 2024 |
| Redstone Insurance Brokers Ltd | Financial services | 2007 |
| Redwood Close Management Company Limited | Households | 1972 |
| Redwoods Group Developments Limited | Financial services | 2025 |
| Reeds Torcross Ltd | Real estate | 2025 |
| Regal Diadem Limited | Professional & scientific | 2013 |
| Regal Home Care Limited | Health & social care | 2001 |
| Regency Capital Investments Limited | Real estate | 2013 |
| Regency Grove Communications Ltd | Information & communication | 2008 |
| Regency Law Possessions Ltd | Professional & scientific | 2018 |
| Regenease Consulting Limited | Professional & scientific | 2022 |
| Reghin Consultancy Ltd | Hospitality | 2024 |
| Regis Schafer Ltd | Information & communication | 2022 |
| Reigate Cars Ltd | Transport & logistics | 2016 |
| Reigate Services Limited | Real estate | 2024 |
| Reiki Response Ltd | Health & social care | 2014 |
| Reis IT Limited | Information & communication | 2014 |