| Ready Pave by Design Limited | Construction | 2016 |
| Real Canna Seeds Limited | Agriculture & fishing | 2020 |
| Real Indian Food Kent Ltd | Hospitality | 2011 |
| Rebec Limited | Construction | 2002 |
| Rechats Limited | Professional & scientific | 2016 |
| Recipefinder Limited | Information & communication | 2025 |
| Reciprocal Limited | Administrative & support | 2009 |
| Recruiter Hub Limited | Administrative & support | 2009 |
| Recruiting Experts in Development Ltd | Administrative & support | 2022 |
| Recruitment Selection Limited | Administrative & support | 2004 |
| Recuiter Bird Limited | Real estate | 2021 |
| Recyclamet Ltd | Water & waste | 2024 |
| Recycle King Ltd | Construction | 2022 |
| Recycle ME Kent Ltd | Extraterritorial | 2014 |
| Recyclemeuk Ltd | Water & waste | 2012 |
| Red Billed Limited | Construction | 2023 |
| Red Blanket Limited | Information & communication | 2012 |
| Red Facades Ltd | Construction | 2017 |
| Red Oak Financial Limited | Financial services | 2024 |
| Red Panda Learning Limited | Public administration | 2017 |
| Red Squirrel Shop Ltd | Wholesale & retail | 2017 |
| Redbrick Properties (Kent) Limited | Real estate | 2016 |
| Redmond Associates (Kent) Limited | Administrative & support | 2000 |
| Redstar-Workshop Ltd | Wholesale & retail | 2021 |
| Redwood Design and Construction Limited | Professional & scientific | 2021 |
| Reeflogic Ltd | Information & communication | 2019 |
| Refined Care Services Ltd | Health & social care | 2023 |
| Refiner's Place Ltd | Other services | 2014 |
| Reform Yourself Pilates Ltd | Arts & recreation | 2023 |
| Refulgent Software Ltd | Information & communication | 2019 |
| Regal Education Consultancy Ltd | Education | 2026 |
| Regala Properties Ltd. | Real estate | 2007 |
| Regalix Ltd | Other services | 2023 |
| Regan Brickwork (Kent) Limited | Construction | 2019 |
| Regan Brickwork Limited | Construction | 2004 |
| Regency Plastering Limited | Construction | 1996 |
| Regent Development Group Holdings Limited | Financial services | 2016 |
| Regent Development Limited | Construction | 1995 |
| Regintel Solutions Ltd | Professional & scientific | 2025 |
| REGTECH365 Limited | Information & communication | 2026 |
| Rehal Planning Limited | Professional & scientific | 2014 |
| Rehoboth 392 Camden Ltd | Real estate | 2020 |
| Rehoboth Dover Ltd | Real estate | 2022 |
| Rehoboth Malham Ltd | Real estate | 2023 |
| Rehoboth Oakley Place Ltd | Real estate | 2021 |
| Rehoboth Summit Ltd | Real estate | 2022 |
| Reid Roofing Limited | Construction | 2011 |
| Reillys Roofing Ltd | Construction | 2026 |
| Rejem Limited | Professional & scientific | 2019 |
| Reky Developments Ltd | Real estate | 2024 |
| Reky Residentials Ltd | Real estate | 2026 |
| Reli MED Ltd | Health & social care | 2020 |
| Reliable Elevator Services Limited | Manufacturing | 2008 |
| Reliable IT Solutions Limited | Information & communication | 2019 |
| Reliance Community Ltd | Other services | 2022 |
| Relocation Star Ltd | Extraterritorial | 2023 |
| Rely Therapy Ltd | Health & social care | 2026 |
| Remedial Medical Clinic Limited | Health & social care | 2012 |
| Remindwell Ltd | Information & communication | 2025 |
| Remote Tax Accountants Ltd | Professional & scientific | 2022 |
| Remove CCJ C.I.C. | Professional & scientific | 2024 |
| Remove CCJ Services Ltd | Professional & scientific | 2024 |
| Remvic Enterprises Ltd | Health & social care | 2016 |
| Remy International Security Consultancy Limited | Administrative & support | 2026 |
| Renewables of Hampshire Limited | Construction | 2021 |
| Renewed International Church C.I.C. | Other services | 2020 |
| Renewhue Ltd | Manufacturing | 2024 |
| Renihaus Ltd | Health & social care | 2026 |
| Renley Properties Ltd | Real estate | 2021 |
| Rennova Ltd | Construction | 2024 |
| Renny&George's Books Limited | Wholesale & retail | 2022 |
| RENOV4 Properties Limited | Real estate | 2025 |
| Renown Pictures Limited | Information & communication | 1994 |
| Renown Productions Limited | Information & communication | 2002 |
| Rent ZIP Letting Ltd | Real estate | 2023 |
| Renuvate Ltd | Construction | 2023 |
| Renwick Groceries Ltd | Wholesale & retail | 2026 |
| Reon Properties Limited | Real estate | 2024 |
| RES Catering Ltd | Hospitality | 2025 |
| Resinit Ltd | Construction | 2019 |
| Resolution Medical Ltd | Health & social care | 2023 |
| Response UK Security Limited | Administrative & support | 2012 |
| Restaurant Management Systems Ltd | Administrative & support | 2024 |
| Restless Violets Limited | Information & communication | 2024 |
| Restorative Justice 4 Schools Limited | Professional & scientific | 2006 |
| Restore Datashred Limited | Administrative & support | 2016 |
| Retons Care and Training Services Ltd | Health & social care | 2011 |
| Retrorace Ltd | Arts & recreation | 2023 |
| Return Point Ltd | Information & communication | 2020 |
| Reukhc Ltd | Other services | 2022 |
| REV Pro Consulting Ltd | Professional & scientific | 2026 |
| REV Silver Ltd | Hospitality | 2022 |
| Revased Ltd | Wholesale & retail | 2006 |
| Revian Ltd | Information & communication | 2013 |
| Revitalise Marketing Limited | Professional & scientific | 2020 |
| Revivity Limited | Other services | 2024 |
| Rexglobe & Partners Limited | Real estate | 2015 |
| Rexhill (South East) Limited | Construction | 2014 |
| RFA Properties Limited | Real estate | 2023 |
| RFA Smart Construction Limited | Construction | 2020 |