| Star Kickboxing Ltd | Arts & recreation | 2023 |
| Star Serv Ltd | Transport & logistics | 2020 |
| Starfluence Ltd | Information & communication | 2014 |
| Starfluence Properties Ltd | Real estate | 2022 |
| Starkos Healthcare Ltd | Health & social care | 2023 |
| Starlight Ecommerce Ltd | Professional & scientific | 2024 |
| Starlight Pubs Ltd | Hospitality | 2017 |
| Stars Services Ltd | Administrative & support | 2022 |
| Startans Medway Ltd | Other services | 2019 |
| Stat Contractors Ltd | Construction | 2020 |
| Statim Consultancy Ltd | Professional & scientific | 2025 |
| Station Road (Greenhithe) Management Company Limited | Households | 2009 |
| Station Road Flats Limited | Households | 2005 |
| Statsmania Ltd | Information & communication | 2024 |
| Status Inn Ltd | Construction | 2018 |
| Staunch Group Services Ltd | Construction | 2023 |
| Stay-X Ltd | Hospitality | 1982 |
| STC Building and Renovation Limited | Construction | 2019 |
| STC Trans Limited | Transport & logistics | 2018 |
| Steady Services Limited | Other services | 2017 |
| Steelflow Ltd | Construction | 2023 |
| Steelwork Solutions UK Ltd | Construction | 2021 |
| Stefano Stea Ltd | Health & social care | 2022 |
| Stelecomm Technology Ltd | Information & communication | 2025 |
| Step in Stones Properties Ltd | Real estate | 1999 |
| Step UP Contractors Ltd | Construction | 2023 |
| Stephen P GAY Funeral Service Limited | Other services | 2012 |
| Stephen P GAY Memorials Limited | Other services | 2012 |
| Steppers Childcare Ltd | Health & social care | 2023 |
| Sterling Knight Group Limited | Real estate | 2018 |
| Sterling Knight Properties Ltd | Real estate | 2016 |
| Stevedoring and Haulage Services Limited | Administrative & support | 1972 |
| Steveknight Ltd | Professional & scientific | 2019 |
| Stevenson Trading Group Ltd | Financial services | 2026 |
| Steves Collectables Limited | Wholesale & retail | 2018 |
| Stmadas Ltd | Health & social care | 2011 |
| Stokes Property Development Ltd | Real estate | 2021 |
| Stonearcade Limited | Wholesale & retail | 2014 |
| Stonebridge and Lime Limited | Construction | 2026 |
| Stonebridge Estates & Lettings Limited | Real estate | 2013 |
| Stonebridge UK Holdings Limited | Real estate | 2018 |
| Stonebros Commercials Limited | Wholesale & retail | 2026 |
| Stonelake Limited | Financial services | 2014 |
| Storage Box Self Storage Ltd | Administrative & support | 2003 |
| Storm Hollie Limited | Professional & scientific | 2024 |
| Storming Camel Motorsport Ltd | Arts & recreation | 2021 |
| Storming Events Ltd | Arts & recreation | 2023 |
| Straight Line Services Limited | Manufacturing | 1984 |
| Strategic Practice Solutions Limited | Professional & scientific | 2010 |
| Strategy P Ltd | Professional & scientific | 2024 |
| Stravis Properties Ltd | Construction | 2025 |
| Streamlife Ventures Limited | Construction | 2022 |
| Streamline Construction Kent Limited | Construction | 2026 |
| Street Food India Ltd | Hospitality | 2025 |
| Stride Networks Limited | Mining & quarrying | 2016 |
| STRIVE2SCORE Limited | Education | 2023 |
| Strong Foundation EBS Limited | Construction | 2024 |
| Structura Building Group Limited | Construction | 2025 |
| Structura Property Holdings Limited | Real estate | 2025 |
| Structured Stays Limited | Real estate | 2026 |
| Stst Consulting Ltd | Transport & logistics | 2023 |
| Stuart Castle Property Ltd | Real estate | 2024 |
| Stuart Walters Design Services Ltd | Arts & recreation | 2014 |
| Student Chambers Ltd | Information & communication | 2020 |
| Studio 9 Films Limited | Information & communication | 2007 |
| Studio Brown Recruitment Ltd | Administrative & support | 2024 |
| Studio Gagliano Limited | Professional & scientific | 2019 |
| Studio Mardell Limited | Other services | 2009 |
| Studio Soleye Ltd | Information & communication | 2025 |
| Studiohotel UK Ltd | Real estate | 2020 |
| STUFF4MX Ltd | Wholesale & retail | 2021 |
| Stujenkins.Com Ltd | Other services | 2025 |
| Styles Glass & Glazing Ltd | Construction | 2011 |
| Styletech Ltd | Hospitality | 2009 |
| SUB Carp Products Ltd | Wholesale & retail | 2020 |
| SUB Rosa Architecture Limited | Professional & scientific | 2008 |
| Sub-Zero Air Conditioning Services Ltd | Construction | 2018 |
| Subnex Group Ltd | Information & communication | 2025 |
| Sucu & Seker Limited | Hospitality | 2024 |
| Sukhmani Productions Ltd | Information & communication | 2025 |
| Sullivan & Co Estates Ltd | Real estate | 2023 |
| Suman's Kitchen Limited | Hospitality | 2019 |
| Sumathy Investments Ltd | Real estate | 2023 |
| Sumathy's Coffee Ltd | Hospitality | 2025 |
| Sumez Hospitality Ltd | Hospitality | 2024 |
| Summit Care Ltd | Health & social care | 2019 |
| Sumner Construction Limited | Construction | 2003 |
| Sun Systems IT Services Limited | Information & communication | 2011 |
| Sunbeds TT Ltd | Other services | 2026 |
| Sundaes in Dymchurch Ltd | Hospitality | 2022 |
| Sunder CL Ltd | Wholesale & retail | 2025 |
| Sunningdale Court Management Limited | Real estate | 2004 |
| Sunningvale Close Management Limited | Households | 2019 |
| Sunrise Homecare Limited | Health & social care | 2025 |
| Sunshine Investments Ltd | Real estate | 2018 |
| Super Crystal Cleaning Services Ltd | Administrative & support | 2023 |
| Super Mentality Ltd | Manufacturing | 2024 |
| Super People Ltd | Information & communication | 2011 |
| Super Services 22 Ltd | Construction | 2022 |
| Superb Number Plates Ltd | Manufacturing | 2023 |