| QEC Central Europe Ltd | Professional & scientific | 2011 |
| Qflooring Limited | Wholesale & retail | 2020 |
| Qualifly Limited | Professional & scientific | 2018 |
| Qualitas Surveyors Ltd | Professional & scientific | 2024 |
| Quality Garden Structures Ltd | Wholesale & retail | 2024 |
| Quantatico Ltd | Information & communication | 2025 |
| Quarterdeck Seaview Limited | Households | 2025 |
| Quay Yachts Ltd | Administrative & support | 2023 |
| Quegal Ltd | Administrative & support | 2011 |
| Quercus Testing Ltd | Construction | 2014 |
| Quickchill Ltd | Manufacturing | 2025 |
| Quickybaby Entertainment Limited | Information & communication | 2017 |
| Quinazolabs Ltd | Professional & scientific | 2025 |
| Quintessential Cleaning Ltd | Administrative & support | 2018 |
| R & L Property Kent Ltd | Administrative & support | 2023 |
| R Harris Property Limited | Professional & scientific | 2015 |
| R K S Contractors Limited | Construction | 2010 |
| R L J Investments Limited | Real estate | 1972 |
| R Paine Legal Services & Marketing Ltd | Professional & scientific | 2024 |
| R Perkins Electrical Limited | Construction | 2005 |
| R&L Property & Commercial Limited | Real estate | 2022 |
| R&R Audio Visual Ltd | Construction | 2020 |
| R&R Jewellery Limited | Manufacturing | 2021 |
| R. Charlton & Co Ltd | Professional & scientific | 2014 |
| R1 Fibre Ltd | Construction | 2025 |
| R4 Exterior Cleaning Ltd | Administrative & support | 2022 |
| Rachel Leigh Bakes Ltd | Wholesale & retail | 2024 |
| Radiance Beauty Clinic Limited | Other services | 2018 |
| Radio Folkestone CIC | Information & communication | 2024 |
| Radnor Park Avenue Management Company Ltd | Households | 2018 |
| Raga Services Ltd | Real estate | 2015 |
| Raggles Ltd | Hospitality | 2021 |
| Raging Demon Entertainment Limited | Manufacturing | 2015 |
| Railtech Rail and Construction Limited | Professional & scientific | 2025 |
| Rank Nutrition Limited | Health & social care | 2012 |
| Ransley & Sons Limited | Construction | 2026 |
| Rated Solutions Limited | Construction | 2013 |
| Rawlings & Partners Limited | Professional & scientific | 2020 |
| RAY Arnold Safety Limited | Professional & scientific | 2014 |
| Rayner-Canham Ltd | Real estate | 2022 |
| Raze Hell Entertainment Ltd | Arts & recreation | 2021 |
| RCG Casebourne Limited | Construction | 2025 |
| RCG Homes Limited | Construction | 2018 |
| RCG JV Limited | Construction | 2025 |
| RCG JV1 Limited | Real estate | 2020 |
| RCG SPV18 Limited | Construction | 2021 |
| RCG SPV22 Limited | Real estate | 2023 |
| Rcg-Bcf Limited | Construction | 2020 |
| Rcg-Non Limited | Construction | 2023 |
| Re.Wrap Ltd | Wholesale & retail | 2023 |
| Re:Stock Kent Limited | Wholesale & retail | 2020 |
| Reach IT Consultancy Ltd | Information & communication | 2024 |
| Reach Monitor UK Ltd | Professional & scientific | 2020 |
| Reactwoo Ltd | Professional & scientific | 2025 |
| Real Socialising Ltd | Administrative & support | 2022 |
| Rebecca Jones Legal Services Limited | Professional & scientific | 2025 |
| Rebel Muse Studios Ltd | Information & communication | 2023 |
| Reborn Renovations Ltd | Construction | 2024 |
| Rebuild Renew Ltd | Extraterritorial | 2025 |
| Recallshow Limited | Professional & scientific | 1991 |
| Recycle Tech (S.E.) Ltd | Administrative & support | 2021 |
| Red Comet Studios Ltd | Information & communication | 2015 |
| Red Gables Limited | Professional & scientific | 2013 |
| Red-Queen Television Limited | Arts & recreation | 2013 |
| RED2 DEV Limited | Information & communication | 2025 |
| Redacted Version Ltd | Professional & scientific | 2022 |
| Reef Restaurant Limited | Hospitality | 2025 |
| Reeldealhd Limited | Administrative & support | 2009 |
| Reene Technical Services Ltd | Information & communication | 2024 |
| Reenri Hair and Beauty Ltd | Other services | 2017 |
| Reflexion Events Ltd | Information & communication | 2022 |
| Regal Nails and Beauty Sandgate Ltd | Other services | 2025 |
| Regency Court (Hythe) Limited | Households | 1986 |
| Reign Dog Ltd | Wholesale & retail | 2020 |
| Relay Electrical Limited | Construction | 2020 |
| Relay PS Ltd | Construction | 2021 |
| Remdale Ltd | Administrative & support | 2008 |
| Renutech Ltd | Construction | 2012 |
| Residents of 9 Clifton Crescent Ltd | Households | 2025 |
| Resona Music Ltd | Information & communication | 2025 |
| Retaining Solutions Limited | Construction | 2014 |
| Revenue Exchange Limited | Financial services | 2023 |
| Revenue Risk Management Solutions Limited | Information & communication | 2012 |
| Rever Studio Ltd | Wholesale & retail | 2026 |
| Revington Creative Ltd | Arts & recreation | 2018 |
| Revitalise Head Spa & Wellness Ltd | Other services | 2026 |
| Revolv Ltd | Information & communication | 2025 |
| Reynolds & Company (UK) Limited | Construction | 2012 |
| RGC Customs Clearance Ltd | Transport & logistics | 2026 |
| RGC Exports Ltd | Transport & logistics | 2025 |
| RGH Contracts Limited | Construction | 1998 |
| RGH Developments Ltd | Construction | 2022 |
| RH IFA Ltd | Financial services | 2023 |
| Rhema Investments Ltd | Real estate | 2020 |
| Rhyce.Dev Ltd | Information & communication | 2024 |
| Rhythm Connects Ltd | Professional & scientific | 2024 |
| Rich Cronin Limited | Professional & scientific | 2023 |
| Richard a J Thompson Limited | Construction | 2010 |
| Richard James Contracting Ltd | Professional & scientific | 2023 |
| Richmond House (Folkestone) Management Company Limited | Households | 2022 |