| Reel Renew Limited | Construction | 2025 |
| Reel Sweet Pictures Ltd | Information & communication | 2024 |
| Reeves Family (Kent) Limited | Hospitality | 2023 |
| REFLEX-18 Limited | Other services | 2019 |
| Refresh Surgical Ltd | Health & social care | 2023 |
| Regimental Heating Ltd | Professional & scientific | 2025 |
| Reignsons Cottage Ltd | Administrative & support | 2024 |
| Reilly Business Solutions Limited | Wholesale & retail | 2022 |
| Reilly Education Ltd | Education | 2014 |
| Rejuvenairsr Academy of Health and Wellbeing Ltd | Health & social care | 2026 |
| Reliance Capital Ltd | Financial services | 2019 |
| Rellin Limited | Financial services | 2013 |
| Relo Support Services Ltd | Other services | 2015 |
| Rem's Medcare Ltd | Health & social care | 2022 |
| Renew Planning Limited | Administrative & support | 2011 |
| Renew Wrap Concepts Limited | Administrative & support | 2026 |
| Renewable Energy Services Team Ltd | Wholesale & retail | 2018 |
| Renewed to Shine Ltd | Professional & scientific | 2022 |
| Rentova Property Ltd | Real estate | 2025 |
| Renville Farm Limited | Professional & scientific | 1954 |
| Research Inspired C.I.C. | Professional & scientific | 2024 |
| Researchcomm Limited | Information & communication | 2008 |
| Reservoir Road Property Management Limited | Real estate | 2018 |
| Retro Remix Ltd | Wholesale & retail | 2023 |
| Revamp'D Ltd | Wholesale & retail | 2020 |
| Reveille Homes Kent Ltd | Households | 2026 |
| Review Guru Limited | Wholesale & retail | 2025 |
| Revilo Construction Limited | Construction | 2018 |
| Revolution Solutions Ltd | Professional & scientific | 2003 |
| Rexforma Limited | Wholesale & retail | 2022 |
| Reynolds Place Limited | Agriculture & fishing | 2006 |
| RFE Consulting Ltd. | Professional & scientific | 2011 |
| RG Global Bites PVT Ltd | Wholesale & retail | 2025 |
| RGK Marine Consultants Ltd | Professional & scientific | 2022 |
| Rhino Glazing Ltd | Other services | 2010 |
| Rhino Storage Ltd | Transport & logistics | 2014 |
| Rhinoglasssolutions Ltd | Construction | 2025 |
| Rhite Ltd | Arts & recreation | 2022 |
| Rhtl HT Ltd | Real estate | 2024 |
| Rhtl I Ltd | Real estate | 2023 |
| Rhtl Ltd. | Financial services | 2013 |
| Rhtl Property Limited | Real estate | 2021 |
| Rhythm Property Limited | Real estate | 2018 |
| RI Capital Limited | Professional & scientific | 2019 |
| Rice Group Ltd | Financial services | 2021 |
| Rice One Ltd | Professional & scientific | 2021 |
| Rich & Brown Developments Ltd | Real estate | 2022 |
| Richard Green Pharma Consulting Ltd | Professional & scientific | 2024 |
| Richard Mcintyre Ltd | Professional & scientific | 1998 |
| Richardson Watches Limited | Extraterritorial | 2023 |
| Richthaiwellness Ltd | Other services | 2026 |
| Rickard Lazenby and Co. (London) Limited | Extraterritorial | 1996 |
| Rickard Lazenby International Limited | Financial services | 1982 |
| Ricks Plastering and Improvements Ltd | Construction | 2025 |
| Ridgeclub Limited | Real estate | 1998 |
| Right Group of Companies Ltd | Real estate | 2026 |
| Right Guard Solutions Ltd | Administrative & support | 2009 |
| Right Scan - UK Ltd | Health & social care | 2019 |
| Rigley Creative Media Limited | Manufacturing | 2003 |
| RII Services Ltd | Hospitality | 2023 |
| Ringcourt Finance Limited | Financial services | 1963 |
| Rino Design Limited | Construction | 2017 |
| Rio's Cofee Lounge Ltd | Hospitality | 2026 |
| Ripe.London Limited | Wholesale & retail | 2015 |
| Ripple Farm Organics Ltd | Agriculture & fishing | 2014 |
| Rise Above Carpentry & Building Ltd | Manufacturing | 2022 |
| Rise Above Developments Ltd | Manufacturing | 2025 |
| Risk Protection Solutions Ltd | Professional & scientific | 2011 |
| Rivals Innovation Ltd | Financial services | 2025 |
| Riverview Hersden Limited | Real estate | 2014 |
| Riviera PR Ltd | Administrative & support | 2022 |
| RJ Freight & Consulting Ltd | Wholesale & retail | 2021 |
| RJC Wild Ltd. | Wholesale & retail | 2024 |
| Rjmccombe Consulting Limited | Professional & scientific | 2025 |
| RK Exquisite Ltd | Other services | 2015 |
| RKB Leisure Limited | Real estate | 2018 |
| RLP (South East) Limited | Professional & scientific | 2025 |
| RMB Consultants (Civil Engineering) Ltd | Construction | 2010 |
| RMP Detailing Ltd | Administrative & support | 2024 |
| RMS Medical Limited | Health & social care | 2010 |
| RMS Professional Services Ltd | Construction | 2009 |
| RNK Trading Ltd | Wholesale & retail | 2018 |
| Rnmi Investments Limited | Financial services | 2021 |
| RNR Lounge Canterbury Ltd | Other services | 2026 |
| RO Healing & Beauty Ltd | Health & social care | 2022 |
| RO Kent CIC | Education | 2023 |
| Roake & Cook Limited | Professional & scientific | 2020 |
| Roalfe Holdings Limited | Financial services | 2016 |
| ROB Rencen Physiotherapy Ltd | Health & social care | 2007 |
| Robert Brett & Sons Limited | Professional & scientific | 1928 |
| Robert Hinchliffe Technical Translations Limited | Professional & scientific | 2011 |
| Robert Quincey Management Services Limited | Other services | 2013 |
| Roberto Delivers Ltd | Transport & logistics | 2022 |
| Roberts Holdings (Canterbury) Ltd | Construction | 2023 |
| Robian Properties Ltd | Real estate | 2019 |
| Robinbox Ltd | Information & communication | 2015 |
| Robson Specialists Limited | Manufacturing | 2012 |
| Roby Bikes Ltd | Wholesale & retail | 2023 |
| Rochester Court Management Committee Limited | Professional & scientific | 2006 |
| Rock's Cool Ltd | Education | 2024 |