| Root Coir UK Limited | Wholesale & retail | 2021 |
| Root Shell Ltd | Information & communication | 2016 |
| Rootes Wealth Management Ltd | Financial services | 2022 |
| ROS Birchwood Ltd | Professional & scientific | 2015 |
| Rose Clothing Ltd | Financial services | 2023 |
| Rose Haven Care Ltd | Health & social care | 2025 |
| Rose Hill (Tunbridge Wells) Residents Association Limited | Households | 1968 |
| Roseswift Limited | Real estate | 1998 |
| Rosiana Properties Ltd | Wholesale & retail | 2019 |
| Rosie Baylis Hair Limited | Other services | 2021 |
| Rosie Farrer Ltd | Professional & scientific | 2022 |
| Rosie Warren Cafferty Ltd | Administrative & support | 2023 |
| Rosy Dawn LLP | | 2013 |
| Rothley House Management Company Limited | Households | 2008 |
| Rougemont Care and Consultancy Ltd | Health & social care | 2022 |
| Rousillion Limited | Information & communication | 1995 |
| Rowe Agricultural Limited | Administrative & support | 1997 |
| Rowe Pigs Limited | Real estate | 1978 |
| Rowntree Taylor LLP | | 2012 |
| Rowntree Taylor Resources Limited | Administrative & support | 2007 |
| Royal Tunbridge Wells Together CIC | Other services | 2016 |
| Royale Bite Ltd | Manufacturing | 2026 |
| RR & W Enterprises Limited | Extraterritorial | 2023 |
| Rrrr Limited | Professional & scientific | 2022 |
| RS 2000 Ltd | Professional & scientific | 2023 |
| RS Construction (Kent) Ltd | Construction | 2022 |
| RSN Property Management Limited | Real estate | 2024 |
| Rstv Ltd | Information & communication | 2026 |
| Rt&C Ltd | Extraterritorial | 2015 |
| RTC Tuition Centres Ltd | Education | 2022 |
| Rtchi Ltd | Hospitality | 2024 |
| RTS Creative Limited | Professional & scientific | 2010 |
| RTW Consultants Limited | Professional & scientific | 2017 |
| RTW Media Group | Other services | 2022 |
| RTW Town Forum CIC | Arts & recreation | 2021 |
| Rtwpa Ltd | Administrative & support | 2024 |
| Rubencore Ltd | Wholesale & retail | 2025 |
| Rubicon Associates Ltd | Construction | 2018 |
| Ruby Walk Management Company Limited | Households | 2006 |
| Ruby's Kitchen Ltd | Manufacturing | 2017 |
| Ruby's of London Ltd | Extraterritorial | 2020 |
| Rule 74 Data Ltd | Information & communication | 2025 |
| Run Sure Ltd | Information & communication | 2022 |
| Runic Labs Ltd | Manufacturing | 2019 |
| Runix Data Ltd | Information & communication | 2026 |
| Runner Bean Ltd | Information & communication | 2009 |
| Running Tours GB Ltd | Wholesale & retail | 2009 |
| Rural Reflection Ltd | Wholesale & retail | 2025 |
| Rusbridge Family Bakery Limited | Wholesale & retail | 2013 |
| Rusha's Independent Traders Ltd | Construction | 2026 |
| Rushmere Dental Care (UK) Limited | Health & social care | 2009 |
| Rusthall Accident Repairs Ltd | Wholesale & retail | 2020 |
| Rusthall Barber Ltd | Other services | 2021 |
| Rusthall Hub Limited | Other services | 2018 |
| Rusthall Park Management Company Limited | Real estate | 1998 |
| Rustic Developments CS Ltd | Financial services | 2025 |
| Rustic Developments Ltd | Construction | 2025 |
| Rustic Dvelopments SG Ltd | Financial services | 2025 |
| Rvms Ltd | Other services | 2007 |
| RW Invest North Ltd | Real estate | 2016 |
| RW Invest UK Limited | Financial services | 2004 |
| RW Sales and Talent Ltd | Professional & scientific | 2025 |
| RWA Compliance Services Limited | Professional & scientific | 2005 |
| RWE Rural Services Limited | Administrative & support | 2006 |
| RWP Residents' Group Limited | Other services | 2018 |
| Rwtr Consulting Limited | Professional & scientific | 2025 |
| RXN Ltd | Administrative & support | 2019 |
| Ryland Construction Law Services Limited | Professional & scientific | 2012 |
| Rylston Road Health Care Fulham Limited | Construction | 2023 |
| Rymore Limited | Construction | 2004 |
| Rytoncrown Limited | Households | 1986 |
| S & L Solutions (London) Limited | Administrative & support | 2012 |
| S B Green Limited | Information & communication | 2025 |
| S C Mccarthy | Agriculture & fishing | 2013 |
| S H Hardware & Supermarket Ltd | Wholesale & retail | 2024 |
| S J Bishop IT Services Limited | Information & communication | 2025 |
| S N Murdoch Investments Limited | Real estate | 2016 |
| S N Murdoch Property LLP | | 2016 |
| S P Kent Holdings Limited | Financial services | 2021 |
| S Singh Building Services Ltd | Construction | 2018 |
| S. C. Heuston & Co. (Rubber) Limited | Administrative & support | 1995 |
| S. H. Muffett Limited | Manufacturing | 1942 |
| S.A.F.E. Infection Control Ltd | Public administration | 2021 |
| S.O.W.B. Ventures Limited | Information & communication | 2025 |
| S.S.S.E Kent Limited | Construction | 2010 |
| S106 Reclaim Limited | Financial services | 2023 |
| S1D Ltd | Professional & scientific | 2018 |
| S99 Consulting Limited | Professional & scientific | 2019 |
| S@Bre Signs Limited | Administrative & support | 2003 |
| Sable Consultants Ltd | Professional & scientific | 2018 |
| Sabz (UK) Limited | Professional & scientific | 2013 |
| Sadar Trading Ltd | Hospitality | 2024 |
| Safa Properties Ltd | Real estate | 2013 |
| Safe Care Solutions (UK) Ltd | Education | 2022 |
| Safe Recruits Limited | Administrative & support | 2022 |
| Safe School Solutions Ltd | Professional & scientific | 2016 |
| Safe Seal Fire Doors Limited | Construction | 2025 |
| Safeground Property Management Limited | Administrative & support | 1989 |
| Safes.Co (International) Limited | Administrative & support | 2012 |
| Sage Strategy Ltd | Professional & scientific | 2021 |