| Rkachef Consulting C.I.C. | Professional & scientific | 2024 |
| Rmgc Kent Ltd | Construction | 2024 |
| Road MAX Mobile Tyres UK Ltd | Manufacturing | 2026 |
| Roadrunners U.K. Ltd | Wholesale & retail | 2025 |
| Roby Cleaning Ltd | Administrative & support | 2021 |
| Rochester Estates Kent Ltd | Real estate | 2023 |
| Rocket Fuel Entertainment Services Limited | Arts & recreation | 2024 |
| ROE Brickwork Limited | Construction | 2005 |
| ROE Limited | Professional & scientific | 1999 |
| ROE Timber Frame Holdings Limited | Construction | 2015 |
| ROE Timber Frame Limited | Manufacturing | 2005 |
| Rognus Enterprises Limited | Wholesale & retail | 2021 |
| Rolling Product House Limited | Wholesale & retail | 2024 |
| Roma Drom UK CIC | Education | 2024 |
| Roma Path Ltd | Education | 2025 |
| Ropeaccessmedrescueservices Ltd | Energy | 2020 |
| Rose and ALI Ltd | Information & communication | 2025 |
| Rose Light Limited | Education | 2015 |
| Roseb Construction Management Ltd | Construction | 2020 |
| Rosedene Residential Care Limited | Health & social care | 2013 |
| Rosemary Appleton Ltd | Real estate | 2000 |
| Rossotech Engineering Ltd | Administrative & support | 2019 |
| Round in Circles Productions CIC | Arts & recreation | 2020 |
| Rove Knitwear Ltd | Manufacturing | 2024 |
| Rowish Ltd | Information & communication | 2025 |
| RP Trade Limited | Agriculture & fishing | 2020 |
| RRM Holdings Ltd | Real estate | 2025 |
| RRM Management Ltd | Construction | 2004 |
| Rsbh Estate Management (Mary) Limited | Households | 2025 |
| RTW Energy Systems Ltd | Manufacturing | 2026 |
| Ruby Margate Ltd | Hospitality | 2026 |
| Ruby Raphael Ltd | Hospitality | 2018 |
| Ruha Restaurants Ltd | Hospitality | 2019 |
| Ruler Promotions Ltd | Information & communication | 2005 |
| S and M Visual Exhibitions Limited | Professional & scientific | 2020 |
| S and S Event TM Ltd | Public administration | 2026 |
| S C Plant Hire (Thanet) Limited | Other services | 2022 |
| S J Knight Limited | Other services | 2021 |
| S Kunda Limited | Health & social care | 2025 |
| S L Gregory Ltd | Information & communication | 2018 |
| S&G Burrell Holdings Ltd | Administrative & support | 2022 |
| S&M Kitchen Club Ltd | Hospitality | 2025 |
| S&R Aquatics Ltd | Wholesale & retail | 2024 |
| S.O.R. Enterprises Limited | Information & communication | 2018 |
| S.T. Jewellers Limited | Wholesale & retail | 2014 |
| SA & DG Limited | Hospitality | 2015 |
| Sabari Kent Ltd | Health & social care | 2022 |
| Sabre Rigs Limited | Wholesale & retail | 2012 |
| Sabro Electrical Services Limited | Construction | 2022 |
| Sadat Kent Ltd | Financial services | 2018 |
| Safe Flooring Limited | Financial services | 2022 |
| Safescaff Ltd | Construction | 2024 |
| Saffron Oak Partners Ltd | Real estate | 2025 |
| Sahand Buildings Ltd | Construction | 2025 |
| Saint Augustine's Venue Ltd | Hospitality | 2025 |
| Saint Stones Limited | Hospitality | 2024 |
| Salento (UK) Limited | Wholesale & retail | 2001 |
| Salt & Flame Catering Ltd | Hospitality | 2025 |
| Salt & Shore Retail Ltd | Wholesale & retail | 2025 |
| Samandar Property Management Ltd | Real estate | 2014 |
| Samantha Renke Ltd | Information & communication | 2018 |
| Same Day Plumbers (Kent) Ltd | Construction | 2019 |
| Samos Square Pizza Ltd | Hospitality | 2026 |
| Samphire Films JR Ltd | Information & communication | 2025 |
| Samphire Films Ltd | Information & communication | 2023 |
| SAN Marco Management Company Limited | Households | 1989 |
| Sana AM Limited | Real estate | 2023 |
| Sana Professional & Educational Limited | Hospitality | 2023 |
| Sandris Trans Ltd | Transport & logistics | 2021 |
| Sands Beach Huts Ltd | Extraterritorial | 2014 |
| Santhosh & Sons Ltd | Real estate | 2023 |
| Saphalta Ltd | Real estate | 2020 |
| Satari Holdings Kent Ltd | Financial services | 2025 |
| Savage Holdings Limited | Financial services | 2024 |
| Save SLC Ltd | Education | 2026 |
| SAZ Property Management Ltd | Real estate | 2020 |
| SBT4 Ltd | Financial services | 2022 |
| Scent and Fresh Limited | Administrative & support | 2026 |
| SCF Enterprises Ltd | Administrative & support | 2017 |
| Scrubz Cleaning Services Ltd | Administrative & support | 2024 |
| Scubaholics Dive Team Limited | Education | 2006 |
| SD Construction Contractors Ltd | Construction | 2024 |
| SDJ Building Ltd | Construction | 2018 |
| SDP Damp Services Ltd | Construction | 2026 |
| SE Taft Ltd | Financial services | 2024 |
| Sea Beam Ltd | Real estate | 2021 |
| Sea Homes by Kate Limited | Hospitality | 2021 |
| Sea Love CIC | Education | 2026 |
| Sea Love Studio Ltd | Education | 2024 |
| Sea of Purpose Ltd | Professional & scientific | 2024 |
| Sea Scrub Sauna Ltd | Arts & recreation | 2023 |
| Seabird Margate Ltd | Hospitality | 2025 |
| Seablaise Consulting Limited | Information & communication | 2016 |
| Seadogs Margate Ltd | Wholesale & retail | 2023 |
| Seared Ideas Business Branding Limited | Professional & scientific | 2018 |
| Seastar Living Limited | Real estate | 2025 |
| Seastar Property Limited | Real estate | 2024 |
| Seat on Board Limited | Professional & scientific | 2025 |
| Sebastian COX Design Limited | Professional & scientific | 2022 |
| Sebastian COX Ltd | Manufacturing | 2014 |