| Reason Eight Limited | Information & communication | 2003 |
| Rebecca Charlton Limited | Information & communication | 2017 |
| Rebel Yoga Limited | Health & social care | 2023 |
| Reclaimed Brick Solutions Limited | Construction | 2009 |
| Recro Domus Ltd | Professional & scientific | 2012 |
| Recruit BI Ltd | Administrative & support | 2023 |
| Recruitment Resolution Ltd | Administrative & support | 2012 |
| Recruitment Solutions (Surrey) Limited | Professional & scientific | 2010 |
| Red Carpet Group Ltd | Information & communication | 2026 |
| Red Oak (Surrey) Ltd | Real estate | 2025 |
| Red SL Limited | Real estate | 2010 |
| Reema Psychotherapy and Supervision Ltd | Health & social care | 2022 |
| Reformers Retreat Ltd | Health & social care | 2025 |
| Regiis Construction Limited | Construction | 2020 |
| Regiis the Vale Limited | Real estate | 2022 |
| Regium Enterprise Ltd | Wholesale & retail | 2022 |
| Reigate Stepping Stones Ltd | Health & social care | 2010 |
| Reliable Reflections Window Cleaning Ltd | Administrative & support | 2022 |
| Rellexia Ltd | Other services | 2015 |
| Relyable Services Limited | Professional & scientific | 2020 |
| Rems Technology Ltd | Information & communication | 2021 |
| Remus Construction & Development Limited | Construction | 2003 |
| Rent Builder Limited | Real estate | 2007 |
| Repair My Garage LLP | | 2023 |
| Resilience Enterprise Ltd | Health & social care | 2023 |
| Resolutionpress Consultancy Limited | Professional & scientific | 2021 |
| Responsive Maintenance Ltd | Construction | 2019 |
| Restease Innovations Limited | Wholesale & retail | 2024 |
| Retail Vacancies Ltd | Information & communication | 2025 |
| Return to Rage Ltd | Manufacturing | 2022 |
| Rextech Innovations Limited | Wholesale & retail | 2024 |
| Reybar Limited | Wholesale & retail | 2026 |
| Rflc.Solutions Ltd | Professional & scientific | 2021 |
| RG Solutiuons Limited | Professional & scientific | 2026 |
| Richard and Sons Consultants Ltd | Wholesale & retail | 2018 |
| Ridge Radio | Information & communication | 2011 |
| Riha News Ltd | Wholesale & retail | 2011 |
| Riks Consultancy Ltd | Health & social care | 2012 |
| Risk Solutions Hub Limited | Financial services | 2015 |
| Rivington Publishing Limited | Information & communication | 2005 |
| RJY Hammond Ltd | Households | 2015 |
| RK and Co (South East) Limited | Real estate | 2021 |
| RK Auto Locksmiths Limited | Administrative & support | 2007 |
| RKR Technology Limited | Information & communication | 2011 |
| RLS Contractors Ltd | Construction | 2024 |
| RMS Estate Holding Limited | Financial services | 2025 |
| RMS Gateshead Estate Limited | Real estate | 2025 |
| RNF London Ltd | Real estate | 2025 |
| Roannis Limited | Professional & scientific | 2017 |
| Robert Cork Agencies Limited | Professional & scientific | 2017 |
| Robert Harris-Ent Ltd | Health & social care | 2011 |
| Robert Smith (Special Make-Up Effects) Limited | Arts & recreation | 2003 |
| Robinson Construction Surrey Ltd | Construction | 2014 |
| Rockstead Plant Hire Ltd | Administrative & support | 2025 |
| Rodenhurst RTM Company Ltd | Households | 2013 |
| Rohini Sharma Ltd | Health & social care | 2018 |
| Rokraider Limited | Wholesale & retail | 2019 |
| Rolling Frames Limited | Information & communication | 2025 |
| Roma Care Services Limited | Health & social care | 2015 |
| Roman Jones Ltd | Construction | 2020 |
| Romley Limited | Real estate | 1959 |
| Rook Asset Management Ltd | Financial services | 2017 |
| Rookery Hill Limited | Extraterritorial | 2008 |
| Root Surveys Ltd | Construction | 2024 |
| Rose Glass Limited | Information & communication | 2022 |
| Rostant Holdings Ltd | Real estate | 2023 |
| Roundhouse Construction Limited | Construction | 2022 |
| Rowan Close Management Company Limited | Real estate | 1998 |
| Roxy and Jack Ltd | Professional & scientific | 2015 |
| Royal Tunbridge Wells Landscapes Limited | Construction | 2019 |
| RP Accountax Ltd | Professional & scientific | 2021 |
| RPM Developments Ltd | Construction | 2022 |
| RRV Associates Limited | Administrative & support | 2025 |
| RS Goods Ltd | Wholesale & retail | 2024 |
| RSH Electrical Contractors Ltd | Construction | 2023 |
| Rsjee Ltd | Hospitality | 2019 |
| RSR Co. Ltd | Other services | 2016 |
| Rtmining Consulting Ltd | Mining & quarrying | 2021 |
| Rubican Block Management Ltd | Administrative & support | 2026 |
| Rubican Ltd | Administrative & support | 2024 |
| Ruby Group (Recruitment) Limited | Administrative & support | 2013 |
| Rugby Medics Limited | Extraterritorial | 2021 |
| Rural Health and Agricultural Studies Education Limited | Professional & scientific | 2020 |
| Rusper Cabins Limited | Construction | 1978 |
| Rycraft Properties Ltd | Real estate | 2026 |
| RZ2 Investments Ltd | Financial services | 2026 |
| S. a. Mortgages Limited | Financial services | 2003 |
| S. Nunn & Co. Limited | Professional & scientific | 2003 |
| S.A.I Infinity Care Ltd | Health & social care | 2012 |
| S.K.A. Designs Limited | Professional & scientific | 1988 |
| Safer Space Sensors Limited | Information & communication | 2024 |
| Safer Space Technology Limited | Information & communication | 2024 |
| Safety Automation Limited | Administrative & support | 2021 |
| Safr Space Limited | Information & communication | 2018 |
| Sage Group Property Limited | Construction | 2025 |
| Sagemaster Cases Limited | Wholesale & retail | 2003 |
| Saint John's Building Company Ltd | Real estate | 2017 |
| Sales Boosters International Limited | Other services | 2018 |
| SAM Haskins Limited | Extraterritorial | 1976 |
| Samijoes Kitchen Ltd | Hospitality | 2025 |