| RJ Moto Leather Ltd | Manufacturing | 2026 |
| RJP Construction S.E. Ltd | Construction | 2012 |
| Rmdeals Limited | Wholesale & retail | 2022 |
| RNS Property (South East) Ltd | Construction | 2025 |
| Roadfactoryfilms Ltd | Information & communication | 2012 |
| Roberts CDM Services Ltd | Professional & scientific | 2024 |
| Robertson House Ltd | Hospitality | 2019 |
| Robertson Mini Market Ltd | Wholesale & retail | 2024 |
| Robin Group Ltd | Construction | 2023 |
| Robin Mark Johnson Limited | Information & communication | 2021 |
| Robinrig Ltd | Information & communication | 2021 |
| Robinson Road Limited | Hospitality | 2007 |
| Rockpool Exhibitions Ltd | Administrative & support | 2006 |
| Rocks Film Festivals Limited | Arts & recreation | 2024 |
| Roland Kelly Limited | Agriculture & fishing | 2014 |
| Rolling Scoops 1066 Ltd | Wholesale & retail | 2025 |
| Roost People Limited | Real estate | 2011 |
| Root Unix Ltd | Information & communication | 2000 |
| Rope 2 Rope Access Solutions Ltd | Other services | 2017 |
| Rose Carpentry Limited | Construction | 2009 |
| Rota Pattern Ltd | Professional & scientific | 2018 |
| Rother Garden Design and Build Limited | Professional & scientific | 2023 |
| Rother Logistics Limited | Transport & logistics | 2017 |
| Rother Tiling Limited | Construction | 2023 |
| Rotherhaven Management Limited | Information & communication | 2012 |
| Rothesay House (Management) Limited | Households | 1994 |
| Rothsay Court Management Limited | Real estate | 2009 |
| Royal Albion Mansions RTM Company Limited | Households | 2004 |
| Royfun Labs Ltd | Information & communication | 2025 |
| Roza Catering Limited | Hospitality | 2024 |
| RP 2022 Ltd | Real estate | 2022 |
| Rrpr Limited | Professional & scientific | 2012 |
| Rsdrive Ready SET Drive Limited | Education | 2026 |
| RSM Building Contractors Ltd | Construction | 2016 |
| RT Utilities Limited | Construction | 2024 |
| Rtwso Productions Limited | Arts & recreation | 2018 |
| Rualf Limited | Households | 2025 |
| Rubble and Mason Ltd | Construction | 2023 |
| Rung Thai Limited | Hospitality | 2020 |
| Rutty Sark Limited | Administrative & support | 2020 |
| RX60 Limited | Agriculture & fishing | 2013 |
| Ryan Hastings Estates Ltd | Real estate | 2024 |
| Ryder Digital Limited | Information & communication | 2023 |
| RYE Bay Fitness Limited | Arts & recreation | 2024 |
| RYE Physiotherapy Limited | Health & social care | 2023 |
| Ryma Management Ltd. | Professional & scientific | 2007 |
| S & N Scaffolding Ltd | Construction | 2022 |
| S a Marina Ltd | Real estate | 2025 |
| S B Services Contractors Limited | Construction | 2011 |
| S Connolly Carpentry Ltd | Construction | 2023 |
| S G Hotel Ltd | Hospitality | 2025 |
| S R Ambition Limited | Hospitality | 2012 |
| S R Toulson Limited | Professional & scientific | 2010 |
| S ROE Construction Consulting Ltd | Construction | 2023 |
| S&S Windows Limited | Construction | 2026 |
| Saafi Properties Limited | Real estate | 2016 |
| Sackville Holdings Limited | Real estate | 2017 |
| Saddlers Place Residents Limited | Households | 2023 |
| Safe Hands Construction Ltd | Construction | 2021 |
| Safe Pages CIC | Education | 2026 |
| Safe Travels Transport Solutions Ltd | Transport & logistics | 2023 |
| Saitechdefence Ltd | Information & communication | 2024 |
| Saiyad U Ltd | Construction | 2025 |
| Sally Elizabeth Limited | Wholesale & retail | 2021 |
| Sally Gardner Limited | Extraterritorial | 2004 |
| Sally King Ltd | Administrative & support | 2012 |
| Salsa Computing Limited | Information & communication | 1996 |
| Sam's Private Hire Limited | Transport & logistics | 2004 |
| Sammons Ltd | Administrative & support | 2023 |
| Sammons Pensions Recruitment Ltd | Administrative & support | 2012 |
| Sammons Recruitment Group Ltd | Financial services | 2019 |
| Sammons Recruitment Ltd | Administrative & support | 1960 |
| Samurai-Consultants Ltd | Administrative & support | 2026 |
| SAN Jacopo Limited | Hospitality | 2020 |
| Sanders DE Roeper Limited | Professional & scientific | 2024 |
| Sandoz Advisory Ltd | Professional & scientific | 2026 |
| Sandrock Hall Management (2006) Limited | Households | 2006 |
| Sandstone Mint Ltd | Administrative & support | 2026 |
| Sanwenuk Ltd | Wholesale & retail | 2025 |
| Saoirse 1 Limited | Real estate | 2022 |
| Sapphire Care & Support Services Limited | Health & social care | 2016 |
| Sasuhome Ltd | Other services | 2017 |
| SAT Business Ltd | Administrative & support | 2014 |
| Satin Healthcare Ltd | Health & social care | 2021 |
| Saunters Light Goods Vehicle Driver Hire Ltd | Agriculture & fishing | 2025 |
| Savant Media Ltd | Information & communication | 2021 |
| Sawyer’S Lettings Limited | Real estate | 2025 |
| Saxon Fire Sprinklers Ltd | Construction | 2023 |
| Saxons Electrical Ltd | Construction | 2026 |
| Scarrchela Ltd | Construction | 2024 |
| Scatterbox Bexhill Limited | Wholesale & retail | 2023 |
| Scattergood Limited | Professional & scientific | 2011 |
| Scrubmummy Ltd | Administrative & support | 2025 |
| Scuffix Ltd | Wholesale & retail | 2026 |
| SD Building & Landscapes Ltd | Construction | 2020 |
| SD Building Services Limited | Construction | 2016 |
| SDD (London) Limited | Construction | 2016 |
| Sea Crest View (Management Company) Limited | Households | 2014 |
| Sea House Cooden Beach Limited | Households | 2014 |
| Sea Lion Services Limited | Manufacturing | 2016 |