| Sorfamily Ltd | Transport & logistics | 2024 |
| Sorici Logistics Ltd | Transport & logistics | 2021 |
| SOS Technical Solutions Limited | Other services | 2015 |
| Soubha Boukhriss Ltd | Wholesale & retail | 2012 |
| Soul Case Ltd | Wholesale & retail | 2023 |
| Soulcare Ltd | Wholesale & retail | 2019 |
| Sound Integration Limited | Wholesale & retail | 2016 |
| Soundminds Initiatives CIC | Health & social care | 2023 |
| Sourcerie Ltd | Information & communication | 2021 |
| Souschef AI Limited | Information & communication | 2026 |
| South Coast Seafayre Limited | Wholesale & retail | 2001 |
| South Court Garage Limited | Wholesale & retail | 2003 |
| South East Climbing - Canterbury Limited | Arts & recreation | 2023 |
| South East Executive Homes Limited | Real estate | 2005 |
| South East Packaging Limited | Administrative & support | 2015 |
| South East Ultrasound Services Limited | Health & social care | 2018 |
| South Eastern Circuit Bar Mess Foundation | Administrative & support | 1999 |
| South Kent Brickwork Ltd | Construction | 2022 |
| South London Auto Services Limited | Wholesale & retail | 2016 |
| South Road Management Limited | Real estate | 2002 |
| Southeastkentpoolservices Ltd | Construction | 2025 |
| Southern Motion Ltd | Wholesale & retail | 2017 |
| Southern Signal Engineering Limited | Construction | 2022 |
| Southern Wines Limited | Wholesale & retail | 2009 |
| Southerncarers Ltd | Public administration | 2026 |
| Southgate Electrical Co. Ltd. | Construction | 2002 |
| Southside Recycling Ltd | Water & waste | 2023 |
| Souvenir Shop Limited | Wholesale & retail | 2020 |
| Sova Assessment Limited | Information & communication | 2015 |
| Sovereign Restorations (Contracts) Limited | Construction | 1996 |
| Sovereign Restorations Ltd | Construction | 2023 |
| Sovereign Skateboards Limited | Wholesale & retail | 2021 |
| Space Time Move Ltd | Transport & logistics | 2024 |
| Spain Brothers & Co Limited | Professional & scientific | 1951 |
| Spain Brothers & Co LLP | | 2009 |
| Spain Brothers (Financial Services) Limited | Administrative & support | 1987 |
| Sparc Labs Ltd | Information & communication | 2020 |
| Spark Trek Domestic Ltd Limited | Construction | 2020 |
| Sparklepants Events CIC | Administrative & support | 2025 |
| Sparktrek Ltd | Construction | 2015 |
| Sparta Security Services Ltd | Administrative & support | 2016 |
| Spearpoint Life Sciences Limited | Professional & scientific | 2026 |
| SPEC2ORDER Limited | Professional & scientific | 2025 |
| Specialised Print Procurement Ltd | Other services | 2022 |
| Spectra Defence Limited | Professional & scientific | 2022 |
| Spectra Integrated Ltd | Information & communication | 2026 |
| Spenbro Limited | Other services | 2006 |
| Sperimeters Collective Ltd | Manufacturing | 2026 |
| Sphinx Properties Holding and Management Ltd | Real estate | 2023 |
| Spice Gold Food Limited | Hospitality | 2022 |
| Spicy and Sweet Time Limited | Hospitality | 2025 |
| Spin OFF Solutions Ltd | Professional & scientific | 2012 |
| Spindle Tree Ltd | Financial services | 2025 |
| Spire Management and Studios Limited | Professional & scientific | 2024 |
| Spires Academy | Education | 2007 |
| Spitfire Volleyball Limited | Arts & recreation | 2023 |
| Spofforths LLP | | 2005 |
| Sportech Academy Limited | Education | 2024 |
| Sports Diplomacy Limited | Professional & scientific | 2020 |
| Sports Relief Limited | Other services | 2025 |
| Sportsed Limited | Education | 2017 |
| Spotty Ball Supplies Ltd | Wholesale & retail | 2026 |
| Spqr (Walmer) Management Company Limited | Households | 2008 |
| Sprockets Limited | Wholesale & retail | 2009 |
| SPS Thermal Ltd | Construction | 2023 |
| SPT 79 Ltd | Financial services | 2023 |
| Spurcomm Ltd | Professional & scientific | 2012 |
| Square Circle Developments Limited | Construction | 2017 |
| Squid Lips Capital Ltd | Financial services | 2021 |
| SRA Medical Services Limited | Health & social care | 2019 |
| Sreevijay Ltd | Administrative & support | 2011 |
| SRI Atharva Sravan Sanka Ltd | Health & social care | 2024 |
| Srini Estates Ltd | Real estate | 2022 |
| SS Gadgets & Gifts UK Ltd | Wholesale & retail | 2026 |
| Ssddk Ltd | Wholesale & retail | 2020 |
| Ssgwm Ltd | Hospitality | 2026 |
| SSR Developments Limited | Construction | 2025 |
| SSS Property Services Ltd | Real estate | 2016 |
| ST Andrews Folkestone Limited | Real estate | 1996 |
| ST Andrews Place Management Company Limited | Households | 2005 |
| ST Canterbury the Stylers Limited | Other services | 2015 |
| ST Dunstan's Enterprise Limited | Hospitality | 2024 |
| ST Dunstans (Estate) Ltd | Real estate | 2026 |
| ST Dunstans (Holdings) Ltd | Financial services | 2026 |
| ST Dunstans Realty Limited | Real estate | 2025 |
| ST Dunstans Store Ltd | Wholesale & retail | 2025 |
| ST George’S Place Canterbury Management Company Limited | Households | 2025 |
| ST John's Place (Canterbury) Management Company Limited | Extraterritorial | 2025 |
| ST Lawrence Cottages Management Co Ltd | Real estate | 2012 |
| ST Lawrence Court (Canterbury) Limited | Households | 2023 |
| ST Lawrence Court (Investment) Limited | Households | 2025 |
| ST Margaret's (Canterbury) Ltd | Professional & scientific | 2022 |
| ST Peter's Lane Apartments Management Company Limited | Households | 2014 |
| ST Peter's Lane Town House Management Company Limited | Households | 2014 |
| ST Stephen's Academy Canterbury | Education | 2010 |
| ST Thomas Hill Ltd | Real estate | 2022 |
| ST Thomas Place Townhouses (Canterbury) Management Company Limited | Households | 2016 |
| ST. Augustines Village Residents Association Limited | Households | 2000 |
| ST. Dunstan's (Canterbury) Management Limited | Households | 1996 |
| ST. Edmund's School Canterbury | Education | 1996 |