| Spa Architects LLP | | 2016 |
| Spark Action Portraits Limited | Arts & recreation | 2010 |
| Spark Group Ltd | Construction | 2019 |
| Spectrum Dance Academy Limited | Education | 2024 |
| Spectrum Gymnastics Academy Ltd | Arts & recreation | 2017 |
| Spicy Gecko Design Limited | Professional & scientific | 2025 |
| Sports Feathers Limited | Professional & scientific | 1950 |
| Spotted PUB Ltd | Hospitality | 2024 |
| SPV 123 ABC Residential Ltd | Real estate | 2022 |
| SS Williams and Co Ltd | Administrative & support | 2021 |
| ST Pierre Contractors Limited | Construction | 2006 |
| ST Pierre Holdings Limited | Financial services | 2025 |
| ST. Omer Freehold Company Limited | Households | 2003 |
| ST. Omer Residents Company Limited | Households | 1974 |
| St.James Court (Bromley) Ltd | Households | 2001 |
| Stage & Tiers Ltd | Administrative & support | 2021 |
| Stanacre Court (Freehold) Limited | Households | 2007 |
| Stanacre Court Management Company Limited | Households | 2004 |
| Star Buy Builders Merchants Ltd | Wholesale & retail | 2020 |
| Staysafe Maintenance Services Ltd | Construction | 2018 |
| Stenmar Aluminium Limited | Real estate | 1967 |
| Steve Hawkins Plumbing & Heating Limited | Administrative & support | 2003 |
| Stock 1ST Livestock Services Limited | Agriculture & fishing | 2005 |
| Stockerston Farms LLP | | 2009 |
| Stonepitts Limited | Professional & scientific | 2008 |
| Stonepitts Partners LLP | | 2010 |
| Stonewall Park Limited | Wholesale & retail | 1987 |
| Store One Moto Limited | Wholesale & retail | 2025 |
| STP Commercial Solutions Limited | Financial services | 2011 |
| STP Employee Trustee Limited | Professional & scientific | 2022 |
| STP Solutions Limited | Professional & scientific | 2002 |
| Strategic Retail Solutions Limited | Wholesale & retail | 2024 |
| Studio Lodgewood Ltd | Professional & scientific | 2026 |
| Sumara Travels Ltd | Administrative & support | 2024 |
| Sunlight Renewable Energy Ltd | Manufacturing | 2023 |
| Supplywell Consulting Ltd | Professional & scientific | 2025 |
| Surveyor Link Limited | Administrative & support | 2009 |
| Sussex Caravan Centre (East) Limited | Wholesale & retail | 2009 |
| Sustainable Energy Partnership Limited | Professional & scientific | 2007 |
| Swallows Return Limited | Professional & scientific | 2019 |
| Swan Watch Limited | Other services | 2020 |
| Sweetwoods Park LLP | | 2008 |
| Syndicated Features Limited | Extraterritorial | 1951 |
| T. Allman Butchers Ltd. | Wholesale & retail | 2008 |
| Tangent Projects Limited | Construction | 2000 |
| Tannery Place Management Company Limited | Households | 2015 |
| Tapped OUT Ltd | Hospitality | 2025 |
| Target Your Potential Limited | Administrative & support | 2012 |
| Tarn Trading Ltd | Arts & recreation | 1997 |
| Tavistock Carpets Limited | Other services | 1991 |
| Tea N ATE Limited | Wholesale & retail | 2020 |
| Tea N Toast Limited | Hospitality | 2025 |
| Tekram Management Company Limited | Real estate | 2016 |
| Tepe Solutions Ltd | Information & communication | 2013 |
| Textus Strategic Consulting Limited | Professional & scientific | 2026 |
| Tgovs Limited | Administrative & support | 2019 |
| THE Barbers Edenbridge LLP | | 2012 |
| THE BXN Academy Ltd | Arts & recreation | 2025 |
| THE Capital Industrial Estate (Management) Company Limited | Real estate | 1998 |
| THE Classic Car Syndicate Limited | Wholesale & retail | 2017 |
| THE Female Mentoring Alliance Limited | Administrative & support | 2021 |
| THE Fountain Cowden Limited | Hospitality | 2023 |
| THE Handy-Pak Company Limited | Wholesale & retail | 2019 |
| THE Henry (Hever) Limited | Hospitality | 2022 |
| THE Hybrid Residences Ltd | Real estate | 2022 |
| THE Luxury Spa Edit Limited | Information & communication | 2014 |
| THE Magic Toy Shop Ltd | Wholesale & retail | 2009 |
| THE Merry Opera Company Limited | Arts & recreation | 2008 |
| THE Moules & Bread Co Limited | Hospitality | 2018 |
| THE Natural PAW Company Limited | Manufacturing | 2020 |
| THE Old Eden PUB Co Ltd | Hospitality | 2025 |
| THE Richard Stephens Partnership Limited | Professional & scientific | 2003 |
| THE Rock Inn Pubco UK Ltd | Hospitality | 2022 |
| THE Simple Life Limited | Extraterritorial | 2000 |
| THE Snag Hub Limited | Professional & scientific | 2025 |
| THE Spirit of the Garden Ltd | Administrative & support | 2022 |
| THE Third Space Healing & Wellness CIC | Education | 2026 |
| THE True Image Solution Limited | Professional & scientific | 2009 |
| THE UK District Energy Association | Other services | 2010 |
| THE Untitled Agency Limited | Professional & scientific | 2017 |
| THE View School Limited | Education | 2018 |
| THE Widmore Lodge Management Company Limited | Households | 1997 |
| Theodore Gregory Limited | Construction | 1989 |
| Thermokey Limited | Manufacturing | 2018 |
| Thieves Kitchen Ltd | Information & communication | 2017 |
| Thiloka Properties Ltd | Real estate | 2020 |
| Thurstan Group Ltd | Wholesale & retail | 2023 |
| Tiga Advertising Limited | Professional & scientific | 1986 |
| Tilton Capital Limited | Administrative & support | 2022 |
| TIP Top Pics Ltd | Professional & scientific | 2010 |
| Tip-Ease Limited | Hospitality | 2021 |
| Titan Global Ltd | Administrative & support | 2013 |
| TJD Developments Limited | Construction | 2016 |
| Tomas and Jani Limited | Manufacturing | 2024 |
| Tomlinson Research Limited | Administrative & support | 2013 |
| Topfoto Limited | Professional & scientific | 2004 |
| Topham Partners LLP | | 2008 |
| Totalscene Limited | Households | 1990 |
| Town Park Estates Limited | Real estate | 2009 |
| Tradeveris Limited | Information & communication | 2025 |