| Spectrum Blinds Limited | Wholesale & retail | 2003 |
| Spectrum Contractors Limited | Administrative & support | 2024 |
| Spectrum OA Limited | Information & communication | 2002 |
| Spectrum Properties (UK) Limited | Real estate | 1999 |
| Speczone Ltd | Real estate | 2025 |
| Spedan Tower Management Company Limited | Households | 1982 |
| Speedline Motors Limited | Wholesale & retail | 2025 |
| Speedoo Ltd | Wholesale & retail | 2024 |
| Speedreach Business Transformation Limited | Professional & scientific | 2016 |
| Spencer Hill Consulting Limited | Professional & scientific | 2026 |
| Spensley Services Limited | Wholesale & retail | 2009 |
| Spetsnaz Security International Limited | Administrative & support | 2016 |
| Spex in the City Limited | Wholesale & retail | 2001 |
| SPG Builders Limited | Construction | 2002 |
| SPG Southeast Limited | Construction | 2018 |
| SPH Logistics Ltd | Transport & logistics | 2020 |
| Sphere Event Management Ltd | Administrative & support | 2015 |
| Spic 'N' Span (UK) Ltd | Administrative & support | 2007 |
| Spice Cottage Worcester Ltd | Hospitality | 2016 |
| Spice HUT Maidstone Limited | Hospitality | 2016 |
| Spice Lounge (Kent) Limited | Hospitality | 2007 |
| Spice Venue Investments Ltd | Real estate | 2026 |
| Spicer Financial Ltd | Financial services | 2014 |
| Spila Ltd | Construction | 2019 |
| Spinnaker Properties Limited | Real estate | 1994 |
| Spiral Interiors Limited | Construction | 2015 |
| Spire Automotive Limited | Wholesale & retail | 2006 |
| SPL Urfdo Ltd | Transport & logistics | 2011 |
| Splendious Assorted Services Ltd | Public administration | 2022 |
| Splinter & Hertz Ltd | Manufacturing | 2021 |
| Sport Works (South East) Ltd | Arts & recreation | 2026 |
| Sports and Concerts Ltd | Hospitality | 2025 |
| Spotlight Risk and Control Services Limited | Professional & scientific | 2021 |
| Spray Decorating Ltd | Construction | 2022 |
| Spray Direct Limited | Extraterritorial | 2016 |
| Spray Granite Kent Ltd | Construction | 2024 |
| Spray Tech Commercial Refinishing Limited | Wholesale & retail | 2011 |
| Spring Drive Media Ltd | Professional & scientific | 2022 |
| Springfield Quays (Maidstone) Management Limited | Households | 2003 |
| Springfields Farm Estate Ltd | Households | 2025 |
| Sprint 1159 Limited | Extraterritorial | 2006 |
| Sprocket Artwork Ltd | Professional & scientific | 2020 |
| SPV Residential Properties Limited | Real estate | 2024 |
| Spyder Tape Ltd | Wholesale & retail | 2022 |
| SQE Grafty Green Management Co Ltd | Real estate | 2017 |
| SQL Assure Limited | Information & communication | 2016 |
| Sqsurveying Limited | Professional & scientific | 2012 |
| Squared Global Group Limited | Professional & scientific | 2017 |
| SR Carpets Limited | Construction | 2026 |
| SR Families Limited | Real estate | 2024 |
| SR Sons Ltd | Real estate | 2023 |
| SRE Services Ltd | Construction | 2015 |
| Sreon Health Cares Limited | Public administration | 2025 |
| SRG92 Ltd | Transport & logistics | 2024 |
| SRI Saideva Limited | Hospitality | 2021 |
| SRI Vivansh Limited | Hospitality | 2014 |
| Sriram Restaurants Ltd | Hospitality | 2019 |
| Srjempire Ltd | Transport & logistics | 2024 |
| Srpdn Ltd | Professional & scientific | 2014 |
| SRT & Partners Limited | Financial services | 2024 |
| SS Brickwork Ltd | Construction | 2021 |
| SS Building and Maintenance Ltd | Construction | 2023 |
| SS888 Ltd | Real estate | 2024 |
| SSL Online Ltd | Wholesale & retail | 2025 |
| Ssrb Limited | Professional & scientific | 2019 |
| SSS Distribution Ltd | Transport & logistics | 2023 |
| SSU Auditing Ltd | Professional & scientific | 2024 |
| ST Faiths Management Company Limited | Real estate | 2011 |
| ST John's Church of England Primary School Maidstone | Education | 2011 |
| ST Johnswood Limited | Wholesale & retail | 2014 |
| ST Peters Residences Ltd | Construction | 2025 |
| ST Peters Street Car Wash Ltd | Administrative & support | 2023 |
| ST Saviours Studio Ltd | Arts & recreation | 2024 |
| ST Sebastian's Medical Services Ltd | Health & social care | 2015 |
| ST. Andrew's Close Maidstone Property Company Limited | Professional & scientific | 1980 |
| ST. Helens School | Education | 1992 |
| ST. Lawrence Properties Ltd | Construction | 2021 |
| ST. Mary's (NO.2) (Weybridge) Residents Association Limited | Households | 1968 |
| ST. Regis Heights Management Company Limited | Households | 1983 |
| STA Holdings 25 Limited | Financial services | 2025 |
| STA International Holdings Ltd | Financial services | 2018 |
| STA International Limited | Administrative & support | 1994 |
| STA Legal Limited | Professional & scientific | 2021 |
| STA Training Limited | Education | 2025 |
| Staa Group Ltd | Health & social care | 2024 |
| Stabilis Building Services Limited | Construction | 2003 |
| Stack Eleven Ltd | Other services | 2014 |
| Stageline Productions Limited | Arts & recreation | 2008 |
| Stagg Creative Limited | Manufacturing | 2010 |
| Stairlifts Today Limited | Other services | 2016 |
| Stamatt Limited | Construction | 2007 |
| Stan's Tiling Ltd | Construction | 2019 |
| Standard Assured Health Care Ltd | Health & social care | 2021 |
| Stanheath Construction Services Ltd | Construction | 2017 |
| Stanhope Farm Limited | Agriculture & fishing | 2023 |
| Stanley Millhouse Limited | Real estate | 2018 |
| Stanley Sinyo Ltd | Health & social care | 2021 |
| Stanlukas Ltd | Transport & logistics | 2015 |
| Stanton Cross Developments LLP | | 2018 |
| Stanzak Ltd. | Professional & scientific | 2018 |