| Remskeys Events Ltd | Hospitality | 2024 |
| Remskeys Ltd | Other services | 2020 |
| Renewable Careers Limited | Administrative & support | 2022 |
| REX Clayson Building Services Ltd | Construction | 2019 |
| RGM Construction (Kent) Limited | Construction | 2026 |
| RH Consultants UK Limited | Transport & logistics | 2005 |
| RH Dover Limited | Hospitality | 2021 |
| Rhino & Bulls Ltd | Extraterritorial | 2019 |
| Rhino Plant Hire Limited | Professional & scientific | 2002 |
| Ribaz LLC | | 2023 |
| Ribex LLC | | 2023 |
| Richstone Remediation Limited | Professional & scientific | 2026 |
| Riding the Waves Kent CIC | Health & social care | 2025 |
| Riley Marine Services Ltd | Construction | 2021 |
| Rimon Law UK (DE), LLP | | 2025 |
| Rines Private Limited | Information & communication | 2024 |
| Ring Electrical and Security Ltd | Construction | 2025 |
| Ripleys Creative Ltd | Information & communication | 2024 |
| Riser-Recliners.Co.Uk Ltd | Wholesale & retail | 2020 |
| Risk Safety Services Limited | Construction | 2012 |
| Ristretto & CIE Ltd | Extraterritorial | 2024 |
| River Apothecaries Limited | Health & social care | 2014 |
| River Data Protection Services Ltd | Professional & scientific | 2026 |
| River Drinks Ltd | Hospitality | 2026 |
| Riveroak Residents Association Limited | Households | 1983 |
| Rivertide Limited | Professional & scientific | 2001 |
| RJE Rail Limited | Construction | 2011 |
| RJS Water Consulting South East Limited | Professional & scientific | 2026 |
| RKS Beauty Only Direct Suppliers Limited | Wholesale & retail | 2020 |
| RL Renovations Invest Ltd | Extraterritorial | 2021 |
| RL Renovations Ltd | Extraterritorial | 2021 |
| RMW Scaffolding Limited | Construction | 2019 |
| ROB Horswell Training Limited | Arts & recreation | 2012 |
| Robo International Hire Ltd | Financial services | 2023 |
| Robson Auto Service Ltd | Extraterritorial | 2019 |
| Roch PR Ltd | Professional & scientific | 2016 |
| Rock Paper Scissors Hair & Beauty Ltd | Other services | 2019 |
| Rocket Base Limited | Wholesale & retail | 2011 |
| Roman Romanka Education Services Ltd | Education | 2024 |
| Ronce Limited | Real estate | 2019 |
| Roome Works Limited | Wholesale & retail | 2006 |
| Rose Court (Dover) Limited | Extraterritorial | 2015 |
| Rotherwood Butchers Ltd | Wholesale & retail | 2019 |
| Rowan Companies, LLC | | 2020 |
| Roxbee Ltd | Health & social care | 2026 |
| ROY Norman Limited | Professional & scientific | 1990 |
| Royal Cinque Ports Yacht Club Limited | Arts & recreation | 2010 |
| RR Contractors Kent Limited | Construction | 2016 |
| RR Group Developments Limited | Real estate | 2025 |
| RR Group Investments Limited | Real estate | 2026 |
| RRB Carpentry Ltd | Construction | 2025 |
| RRB Fire Limited | Construction | 2025 |
| RS Rock Foundation | Education | 2025 |
| Rubie Estates Limited | Professional & scientific | 1995 |
| Rural Homes & Developments Limited | Construction | 2024 |
| Rushita Ltd | Health & social care | 2024 |
| Russell Rail Ltd | Construction | 2019 |
| Russian Identity & Governance Research Initiative Limited | Professional & scientific | 2025 |
| Rvmw Enterprises Ltd | Administrative & support | 2024 |
| RVP Consult Ltd | Extraterritorial | 2024 |
| RXO UK Ltd | Transport & logistics | 1999 |
| S & J Developments South East Ltd | Construction | 2023 |
| S G Goff Bricklayer Limited | Construction | 2011 |
| S Maralfalfa Progreso Limited | Agriculture & fishing | 2023 |
| S&J Garden Landscapes Ltd | Administrative & support | 2025 |
| S&R Chicken and Ribs Ltd | Hospitality | 2025 |
| S-Let Ltd | Hospitality | 2016 |
| S-P Consulting Invest Ltd | Extraterritorial | 2025 |
| S.C. Green Limited | Professional & scientific | 2003 |
| S.D. Consulting Belgium Ltd | Professional & scientific | 2007 |
| S.R.Heating Limited | Construction | 2021 |
| Sabari Restaurant Ltd | Hospitality | 2025 |
| Sabell Casting Ltd | Administrative & support | 2021 |
| Safari Books Online, LLC | | 2011 |
| Safelyswim Limited | Education | 2021 |
| Sage Enviro Ltd | Agriculture & fishing | 2014 |
| Sage Spaces UK Ltd | Real estate | 2025 |
| Sagescape Ltd | Agriculture & fishing | 2018 |
| Sagh Investors LLC | | 2012 |
| SAI Firms Ltd | Hospitality | 2015 |
| Saillink Ltd | Transport & logistics | 2021 |
| Salescience.Ai Inc. | | 2025 |
| Sally Reeve Limited | Other services | 2010 |
| Salon D'Affaires Limited | Information & communication | 2004 |
| Saltonvale Group Limited | Wholesale & retail | 2026 |
| SAM Gazi Cleaning Service Ltd | Administrative & support | 2025 |
| Samantha Grant Medical Aesthetics Ltd | Health & social care | 2021 |
| Samphire Customs Limited | Administrative & support | 2001 |
| Samphire Star Education Trust | Education | 2012 |
| SAN Chau Associates Limited | Professional & scientific | 2014 |
| Sanctuary Flats (Sandwich Bay) Limited | Households | 1969 |
| Sandown Place Management Company Limited | Households | 2004 |
| Sandwich Cars Limited | Transport & logistics | 2025 |
| Sanzar Limited | Real estate | 2022 |
| Sapphire International Transport Limited | Transport & logistics | 2007 |
| Saraton Limited | Information & communication | 1997 |
| Sarilmaz Ltd | Manufacturing | 2016 |
| SAS Administrative Services Limited | Professional & scientific | 2022 |
| SAS Contract Builders Limited | Construction | 2013 |
| Sash Window Repairs Ltd | Construction | 2021 |