| Star and Sail Ltd | Administrative & support | 2026 |
| Star Taxis Folkestone Ltd | Transport & logistics | 2026 |
| Starlight Consultants UK Limited | Administrative & support | 2013 |
| Starlight Rituals Ltd | Manufacturing | 2025 |
| Stay 2A Folkestone Ltd | Hospitality | 2019 |
| Steep Street Coffee Limited | Hospitality | 2016 |
| Steer Limited | Professional & scientific | 2009 |
| Stellar Quality Consulting Limited | Professional & scientific | 2017 |
| Stelo Travel Limited | Administrative & support | 2026 |
| Stem by Stem Ltd | Wholesale & retail | 2007 |
| Stephen J Kettle and Associates Limited | Professional & scientific | 2009 |
| Stephen Lower Insurance Services Holdings Ltd | Administrative & support | 2007 |
| Stephen Lower Insurance Services Ltd | Financial services | 2003 |
| Stephens Building Services Ltd | Construction | 2024 |
| Stepping Stones Counselling Limited | Health & social care | 2026 |
| Sterlingate Limited | Households | 1995 |
| Steve Cutts Films Ltd | Information & communication | 2016 |
| Steve Dunne Associates Limited | Professional & scientific | 2002 |
| Steve Newton Limited | Transport & logistics | 2018 |
| Steve Ward Services (UK) Limited | Professional & scientific | 2013 |
| Steve Ward Styling Limited | Wholesale & retail | 2013 |
| Steven Gillett Plumbing and Heating Ltd | Construction | 2023 |
| Stewart Brothers Properties Ltd | Real estate | 2025 |
| Stewart Family Properties Ltd | Real estate | 2024 |
| Still Standing Pictures Ltd | Information & communication | 2021 |
| STL Garden Boyz Ltd | Arts & recreation | 2023 |
| Stone Paper Scissors Ltd. | Professional & scientific | 2017 |
| Stonetrain Limited | Other services | 2010 |
| Stour Management Limited | Households | 1994 |
| Strab Ltd | Wholesale & retail | 2026 |
| Strange Cargo Arts Company Limited | Arts & recreation | 1995 |
| Strange Photography Ltd | Information & communication | 2012 |
| Strategem Group Limited | Professional & scientific | 2024 |
| Strawberry Homes (Southeast) Ltd | Real estate | 2021 |
| Stream Bathrooms & Property Maintenance Limited | Construction | 2012 |
| Streetbuild Ltd | Construction | 2024 |
| STREETZ2STREETZ LLP | | 2015 |
| Stronger Rocks Ltd | Administrative & support | 2014 |
| Strub UK Limited | Health & social care | 1998 |
| Studio H Plus Limited | Professional & scientific | 2021 |
| Studio Percale Ltd | Professional & scientific | 2022 |
| Studio Radar Ltd | Professional & scientific | 2011 |
| STUDIO21 Productions Ltd | Professional & scientific | 2024 |
| STUDIO421 Ltd | Wholesale & retail | 2021 |
| Stxstx Ltd | Wholesale & retail | 2024 |
| SUB Zero INT Ltd | Wholesale & retail | 2015 |
| Suburbansea Ltd | Real estate | 1964 |
| Subway Solutions Limited | Hospitality | 2019 |
| Subzero Air-Conditioning and Heating Ltd | Wholesale & retail | 2025 |
| Suite Twenty Eight Ltd | Other services | 2023 |
| Summit Airport Taxi Limited | Transport & logistics | 2024 |
| Summit Taxi Ltd | Transport & logistics | 2022 |
| Sun Key Energy Ltd | Construction | 2024 |
| Suna Restaurant Ltd | Hospitality | 2015 |
| Sunahang Ltd. | Real estate | 2024 |
| Sunny Sands Ltd | Hospitality | 2026 |
| Sunphoenix Limited | Hospitality | 2020 |
| Super Pet Travel Ltd | Transport & logistics | 2023 |
| Suprim Trading Ltd | Hospitality | 2019 |
| Surella Ltd | Wholesale & retail | 2023 |
| Survivor Essentials Ltd | Wholesale & retail | 2023 |
| Susi’S Ashford Wedding Limited | Hospitality | 2024 |
| Sustainability Connections CIC | Professional & scientific | 2014 |
| Sutherland House Residents Management Company Limited | Households | 1991 |
| Sutra Financial Systems Limited | Professional & scientific | 2016 |
| Suzy Parker Games Limited | Other services | 2025 |
| SVL Property Ltd | Real estate | 2025 |
| SW Computers Limited | Information & communication | 2016 |
| Sw&P Sales LLP | | 2011 |
| Swallow Brewery Limited | Manufacturing | 2024 |
| Swardley Maps Limited | Professional & scientific | 2024 |
| Sweet Beans Ltd | Manufacturing | 2012 |
| Sweet Wheels Ltd | Hospitality | 2026 |
| Sweets and Treats Folkestone Limited | Wholesale & retail | 2026 |
| Sxrrwland Limited | Administrative & support | 2017 |
| Sylverahen Limited | Information & communication | 2025 |
| Symphony Glow Clinic Ltd | Other services | 2025 |
| T & I Engineering Limited | Professional & scientific | 2013 |
| T & N Hill Waste Services Essex Ltd | Water & waste | 2018 |
| T C Motorhomes Limited | Wholesale & retail | 2010 |
| T C Motors Limited | Wholesale & retail | 2006 |
| T Davies Fire Ltd | Administrative & support | 2017 |
| T W Stables Ltd | Agriculture & fishing | 2019 |
| T Williams Sports Horses Ltd | Agriculture & fishing | 2014 |
| T&G Heating Ltd | Construction | 2015 |
| T&H Nails and Beauty Ltd | Other services | 2022 |
| T. F. Sole Limited | Agriculture & fishing | 2006 |
| T.O.M. Maintenance and Roofing Services Ltd | Construction | 2024 |
| T.Z. Complete Property Services Ltd | Construction | 2026 |
| Ta-Dah! Books Limited | Information & communication | 2023 |
| TAG Trees Limited | Agriculture & fishing | 2010 |
| Talax Associates Limited | Real estate | 2018 |
| Tamalpa UK C.I.C. | Education | 2011 |
| Tamarisk Services Limited | Administrative & support | 2002 |
| Tanak International Limited | Administrative & support | 2000 |
| Tanner Carpentry Limited | Construction | 2018 |
| Tapshop Bathrooms Ltd | Wholesale & retail | 2026 |
| Taste of Himalayan and Annapurna Ltd | Hospitality | 2025 |
| Taste Thai Limited | Hospitality | 2025 |
| Tasteful Trends Ltd | Hospitality | 2025 |