| Stocc IT Limited | Extraterritorial | 2019 |
| Stock Advisory Limited | Professional & scientific | 2025 |
| Stockduk Ltd | Wholesale & retail | 2022 |
| Stokes Catering Limited | Hospitality | 2022 |
| Stone Cottage 4 Limited | Real estate | 2024 |
| Stone Cross Construction South East Ltd | Construction | 2018 |
| Stone Green Group Limited | Financial services | 2022 |
| Stone Green Hall Smallholding Limited | Agriculture & fishing | 2022 |
| Stone Green Park Management Limited | Households | 2022 |
| Stone Pave Drives & Patios Ltd | Administrative & support | 2017 |
| Stone Street Veterinary Services Ltd | Professional & scientific | 2019 |
| Stonebridge Architectural Services Ltd | Professional & scientific | 2019 |
| Stonebridge Property Investment Group Ltd | Real estate | 2026 |
| Stonebridge Securities Limited | Real estate | 1995 |
| Stonehenge Investments Ltd | Financial services | 2021 |
| Stonemix Limited | Construction | 2021 |
| Stonewright UK Limited | Manufacturing | 2007 |
| Storage Solutions (Kent) Limited | Other services | 2018 |
| Storage Solutions Faversham Limited | Real estate | 2020 |
| Store 93 Ltd | Wholesale & retail | 2013 |
| Store House Equity Ltd | Construction | 2019 |
| Store House Perpetual Ltd | Construction | 2019 |
| STORE49 UK Ltd | Wholesale & retail | 2025 |
| Storesmart Limited | Other services | 2024 |
| Storrie Consulting Ltd | Professional & scientific | 2024 |
| Stour Environmental Credits Limited | Professional & scientific | 2024 |
| Stour Festival Company Limited(The) | Arts & recreation | 1964 |
| Stourbow Place Limited | Administrative & support | 2024 |
| Strada Storage Ltd | Transport & logistics | 2026 |
| Straight Recruitment Ltd | Administrative & support | 2020 |
| Straight Talking Development Limited | Professional & scientific | 2015 |
| Straight to the Point PR Ltd | Extraterritorial | 2025 |
| Strank's Removals & Storage Limited | Transport & logistics | 1994 |
| Strata 21 Group Ltd | Real estate | 2023 |
| Strata Assets Ltd | Wholesale & retail | 2015 |
| Strata Commercials Ltd | Wholesale & retail | 2005 |
| Strata Estates Limited | Construction | 2014 |
| Strata Limited | Professional & scientific | 2020 |
| Stratford's Rural Surveyors Ltd. | Professional & scientific | 2016 |
| Stratos Property Group Ltd | Real estate | 2026 |
| Straw and Lime Eco Build Limited | Construction | 2022 |
| Strawberry Blonde Pictures Limited | Professional & scientific | 2013 |
| Streetworkout Plus Ltd | Wholesale & retail | 2023 |
| Strength - CON Ltd | Other services | 2020 |
| Strictly Beauty Limited | Professional & scientific | 2016 |
| Stripp Property Ltd | Households | 2024 |
| Stroke Index 1 Limited | Professional & scientific | 2013 |
| Strongarm Consulting Limited | Information & communication | 2020 |
| Stronger Everyday Ltd | Administrative & support | 2017 |
| Stronger Kent Communities C.I.C. | Health & social care | 2016 |
| Stroud Wealth Management (UK) Limited | Financial services | 2010 |
| Stroud Wealth Management LLP | | 2012 |
| Structural Developments Services Ltd | Manufacturing | 2021 |
| Structural Monitoring Systems PLC | Professional & scientific | 2003 |
| Structural Services (Kent) Limited | Professional & scientific | 2005 |
| STS Properties Development Limited | Real estate | 2025 |
| Stuart Walker Ltd | Construction | 2009 |
| Student LUX Ltd | Real estate | 2024 |
| Studio Elma Ltd | Professional & scientific | 2016 |
| Studio G LAB Ltd | Manufacturing | 2023 |
| Studio Health Limited | Extraterritorial | 2026 |
| Studio J Hair Salon Limited | Other services | 2020 |
| Studio Killers Limited | Information & communication | 2014 |
| Studio Shihabi Ltd | Professional & scientific | 2024 |
| Studiocorbett Ltd | Professional & scientific | 2025 |
| Studiopigs Ltd | Information & communication | 2019 |
| Study Orbits Limited | Education | 2010 |
| Stump OUT Ltd | Administrative & support | 2017 |
| Stunning Shopfitters Ltd | Construction | 2017 |
| Sturch Associates Limited | Construction | 2005 |
| Stus House of Food Limited | Hospitality | 2022 |
| Style Cat Limited | Other services | 2026 |
| Style V Trend Ltd | Information & communication | 2019 |
| Stylegifted Limited | Wholesale & retail | 2016 |
| Stylepart Limited | Real estate | 1990 |
| Suan Clothing Ltd | Wholesale & retail | 2023 |
| Suan Foods Ltd | Hospitality | 2025 |
| Subh Corporation Ltd | Wholesale & retail | 2022 |
| Succeed Digital Consulting Ltd | Information & communication | 2018 |
| Success Platform Global Limited | Wholesale & retail | 2023 |
| Successcare Limited | Health & social care | 2015 |
| Sullivans of Mortlake Limited | Wholesale & retail | 2013 |
| Sullman Rail Ltd | Construction | 2018 |
| Summer & Winter Services Limited | Agriculture & fishing | 1996 |
| Summer Shade Ltd | Wholesale & retail | 2024 |
| Summer-Ized Sessions Limited | Information & communication | 2016 |
| Summers Joiners Ltd | Construction | 2015 |
| Summers Motors Limited | Wholesale & retail | 1987 |
| Sun City Europe Ltd | Real estate | 2010 |
| Sun Developments Limited | Real estate | 2023 |
| Sun-Kissed Limited | Other services | 2016 |
| Sunbury Eyecare Ltd | Health & social care | 2023 |
| Sunbury Roofing Contractors Limited | Construction | 2007 |
| Sunbury Roofing Limited | Construction | 2010 |
| Sundays Bride Limited | Wholesale & retail | 2024 |
| Sunds Consultancy Ltd | Information & communication | 2013 |
| Sunfish Yoga and Therapy Ltd | Health & social care | 2016 |
| Sunflowers Close Limited | Households | 1995 |
| Sungrid Solutions Ltd | Construction | 2025 |
| Sunnies Tanning Studio Limited | Other services | 2022 |