| ST. Marys (North Foreland) Limited | Households | 1996 |
| Stable Mews & Orchard View Residents Limited | Households | 2024 |
| Stacked Foods Limited | Wholesale & retail | 2015 |
| Stackeduk Ltd | Wholesale & retail | 2018 |
| Stammers & Mills Limited | Construction | 2004 |
| Stanart Construction Limited | Construction | 2022 |
| Standard Scaffolding Limited | Construction | 2012 |
| Standing Support Services Limited | Administrative & support | 2021 |
| Stangate Plumbing & Heating Ltd | Construction | 2025 |
| Stannwood Holdings Limited | Real estate | 2025 |
| Stansted Laboratories Limited | Administrative & support | 2010 |
| Star 63 Ltd | Hospitality | 2026 |
| Star Hill Properties Limited | Real estate | 2011 |
| Star Touring Ltd | Administrative & support | 2018 |
| Star.Pigeon.Farms Limited | Real estate | 2025 |
| Starfish Communications LLP | | 2004 |
| Starfish PR Limited | Professional & scientific | 1988 |
| Starlet Interiors Ltd | Transport & logistics | 2021 |
| Starlite Group Holdings Ltd | Financial services | 2023 |
| Starlite Home Improvements Ltd | Construction | 2023 |
| Starlybek Care Limited | Health & social care | 2013 |
| Starlybek Children's Home Ltd | Health & social care | 2026 |
| Starlybek Group Limited | Financial services | 2026 |
| Stash Invest Ltd | Information & communication | 2018 |
| Status a Design Services Limited | Construction | 2020 |
| Staxson Ltd | Professional & scientific | 2018 |
| STC Europe Limited | Manufacturing | 2019 |
| Steam Power Limited | Education | 2017 |
| Steamboat (UK) Ltd | Professional & scientific | 2018 |
| Steel Fixers Squad Ltd | Construction | 2024 |
| Stekoga Ltd | Manufacturing | 2017 |
| Stephen Ivory Limited | Construction | 2016 |
| Sterling Court Residents Association Limited | Households | 1999 |
| Sterling Escapes Ltd | Administrative & support | 2024 |
| Sterling Heat Ltd | Construction | 2019 |
| Sterling Housing & Refurbishment Ltd | Real estate | 2023 |
| Sterling Roofing Solutions Limited | Construction | 2011 |
| Sterling Services Kent Ltd | Other services | 2015 |
| Sterling Vehicles Limited | Administrative & support | 2014 |
| Sterndale Road Management Company Limited | Households | 2006 |
| Steve Brown Mentor Limited | Other services | 2014 |
| Steve Gene Limited | Health & social care | 2014 |
| Steven J Young Limited | Construction | 2018 |
| Stevensons Heating Services Limited | Construction | 2025 |
| Steves Ebay Shop Ltd | Wholesale & retail | 2022 |
| Stewart Advisory Services Ltd | Professional & scientific | 2017 |
| STG Apartments Ltd | Extraterritorial | 2011 |
| STG Resources Ltd | Real estate | 1997 |
| STH Homes Limited | Real estate | 2022 |
| Stilsound Ceilings Limited | Administrative & support | 2008 |
| Stilsound Holdings Limited | Financial services | 2021 |
| Stinton Group Ltd | Wholesale & retail | 2024 |
| Stockbury Garage Ltd | Wholesale & retail | 2025 |
| Stockbury Properties Ltd | Construction | 2023 |
| Stone Styles Limited | Agriculture & fishing | 1987 |
| Stonehall Legal Limited | Professional & scientific | 2021 |
| Stones Fishing Lakes Ltd | Agriculture & fishing | 2024 |
| Storm’S Catering Facilities Ltd | Hospitality | 2022 |
| Story Weavers Ltd | Extraterritorial | 2019 |
| Strategix Accounting Ltd | Professional & scientific | 2023 |
| Strategix Investments Ltd | Real estate | 2024 |
| Stream of Hope CIC | Health & social care | 2025 |
| Streamline Supplies Limited | Wholesale & retail | 2023 |
| Street Bites Ltd | Hospitality | 2026 |
| Streets With Dwellings Ltd | Construction | 2023 |
| Strength 9 Ltd | Professional & scientific | 2008 |
| Strength for ALL Ltd | Other services | 2024 |
| Strive PE and Sport Ltd | Education | 2020 |
| Strood Cabs Limited | Transport & logistics | 2005 |
| STRUCT2GO Ltd | Construction | 2025 |
| Stuart Emery Ltd | Financial services | 2017 |
| Student Tickets Limited | Wholesale & retail | 2024 |
| Studio 6IXTEEN Ltd | Other services | 2020 |
| Studman Property Ltd | Real estate | 2018 |
| Subbs Consult Limited | Professional & scientific | 2024 |
| Sude Limited | Hospitality | 2024 |
| Sumgood Properties Ltd | Real estate | 2025 |
| Summation Consulting Limited | Professional & scientific | 2016 |
| Sumner Holdings Limited | Financial services | 2016 |
| Sun Lane Consulting Ltd | Information & communication | 2017 |
| Sun Shower Tanning Salon Ltd | Other services | 2023 |
| Sunbus Limited | Transport & logistics | 2011 |
| Sunflower Media Productions Limited | Information & communication | 2017 |
| Sunfrost Ltd | Wholesale & retail | 2025 |
| Sunnclean Ltd | Other services | 2019 |
| SUNSHINE58 Limited | Wholesale & retail | 2026 |
| Superfast Labels Ltd | Manufacturing | 1992 |
| Supplytech Services Limited | Professional & scientific | 2025 |
| Supported Fostering Services | Administrative & support | 1995 |
| Supreme Air Ltd | Wholesale & retail | 2019 |
| Suram Limited | Real estate | 2020 |
| Sure IP Limited | Professional & scientific | 2024 |
| SUREGROUP24HR Limited | Construction | 2015 |
| Surrey Site Scaffolding Ltd | Construction | 2022 |
| Surrey Site Supplies Ltd | Wholesale & retail | 2017 |
| Susan & Sarah V Ltd | Wholesale & retail | 2025 |
| Susman Captures Ltd | Professional & scientific | 2021 |
| Suzanne Saunders Ltd | Professional & scientific | 2017 |
| SV Electro Tech PVT Ltd | Information & communication | 2013 |
| SV Rail Services Ltd | Extraterritorial | 2022 |