| Sanglier Bleu Limited | Hospitality | 1977 |
| Sargeant Engineering Limited | Construction | 2015 |
| Saturnos Ltd | Transport & logistics | 2017 |
| Saturnus Productions Limited | Information & communication | 2014 |
| Sawkins Group Limited | Real estate | 2019 |
| Sayers Travel Limited | Administrative & support | 2023 |
| SB Cars Ltd | Transport & logistics | 2018 |
| Scenesafe Holdings Ltd | Financial services | 2019 |
| Scenesafe Limited | Administrative & support | 2005 |
| Sci-Tech Systems Ltd | Professional & scientific | 2003 |
| Scopusuk Limited | Information & communication | 1983 |
| Sean Hill Limited | Information & communication | 2011 |
| Sendwage Ltd | Information & communication | 2025 |
| Sentinel Brand Management Limited | Wholesale & retail | 2013 |
| Seymour Steel Ltd | Construction | 2023 |
| Shadow Coaching Limited | Other services | 2025 |
| Shape Fabrication Limited | Manufacturing | 2021 |
| Shewinsitall Limited | Wholesale & retail | 2023 |
| Shining Through Limited | Arts & recreation | 2022 |
| Shiny Side Ltd | Wholesale & retail | 2019 |
| Shockwatch Limited | Extraterritorial | 1997 |
| Signature Vehicle Revival Limited | Wholesale & retail | 2026 |
| Silver Compass Digital Limited | Administrative & support | 2014 |
| Simona Beauty Store Ltd | Wholesale & retail | 2015 |
| Singers Maintenance Ltd | Construction | 2024 |
| SIO Clean Ltd | Administrative & support | 2025 |
| Skyhawk Services Ltd | Construction | 2024 |
| Slow Road Ltd | Transport & logistics | 2021 |
| Smedley's Autos Ltd | Wholesale & retail | 2024 |
| SMI Services Limited | Construction | 2016 |
| Smiley Home Cleaning Services Ltd | Administrative & support | 2025 |
| SMK Roof Maintenance Ltd | Construction | 2024 |
| Sokol Builders Ltd | Construction | 2024 |
| Solidflow Utilities Limited | Energy | 2025 |
| Sotogrande Limited | Wholesale & retail | 2019 |
| Soul Harmony Life Coaching & Academy Ltd | Health & social care | 2023 |
| SPACE2 Retail Limited | Wholesale & retail | 2009 |
| Split Swift Ltd | Construction | 2026 |
| Springfield Car Sales Ltd | Wholesale & retail | 2022 |
| Star Healing Island Ltd | Other services | 2023 |
| Stayalivelonger Limited | Wholesale & retail | 2011 |
| Steelheart Promotions Ltd | Arts & recreation | 2026 |
| Sterling Couriers (Yorkshire) Ltd | Transport & logistics | 2015 |
| Steve's Homes Ltd | Construction | 2019 |
| Stitched UP Limited | Manufacturing | 2022 |
| Streamline Commercial Advisory Limited | Professional & scientific | 2026 |
| Studio Chroma Ltd | Construction | 2023 |
| Sultann Ltd | Other services | 2024 |
| Sunflower Breakfast and Afterschool - Club Ltd | Education | 2026 |
| Sunshine Fitness Solutions Limited | Health & social care | 2022 |
| Superior Productions Limited | Wholesale & retail | 2023 |
| Surefind Limited | Administrative & support | 2010 |
| Sutton Audio Ltd | Information & communication | 2023 |
| SW Fitness Chester Limited | Arts & recreation | 2020 |
| Swallow Property Ltd | Real estate | 2024 |
| Sweetlandia Ltd | Wholesale & retail | 2025 |
| Systemsnet Ltd | Construction | 2023 |
| Szansok Ltd | Administrative & support | 2024 |
| Szucs Transport Ltd | Transport & logistics | 2019 |
| T G Chauffeur Services Ltd | Transport & logistics | 2026 |
| T L E Computers Limited | Professional & scientific | 1994 |
| T M B Utilities Limited | Construction | 2013 |
| Taverner Renovations Ltd | Construction | 2025 |
| TCM Burnham Limited | Real estate | 2014 |
| Tellis LS Ltd | Health & social care | 2023 |
| Tent & Trek Ltd | Education | 2022 |
| Teslectric Ltd | Transport & logistics | 2019 |
| TFE Capital Holdings Co Limited | Financial services | 2016 |
| THE Anomaly Foundry Ltd | Administrative & support | 2017 |
| THE Beauty Company London Ltd | Other services | 2021 |
| THE Best Cooking Site Ltd | Wholesale & retail | 2021 |
| THE Chimney Baker Ltd | Hospitality | 2018 |
| THE City Milliner Limited | Manufacturing | 2014 |
| THE Creative Sewing Room Limited | Manufacturing | 2017 |
| THE Fotohouse Limited | Professional & scientific | 2020 |
| THE Glamour DEN Ltd Ltd | Other services | 2025 |
| THE Glass House Leadership LAB Ltd | Professional & scientific | 2022 |
| THE Gloves Dolls Ltd | Other services | 2023 |
| THE Green Hundred Company Limited | Professional & scientific | 2007 |
| THE Groovy Grove Ltd | Agriculture & fishing | 2024 |
| THE Hanging City Services Ltd | Construction | 2019 |
| THE Lisa Gilbert Academy Limited | Education | 2026 |
| THE Luxury Roses London Limited | Wholesale & retail | 2016 |
| THE Old Salt Loft Limited | Manufacturing | 2018 |
| THE Polash in Crouch Ltd | Hospitality | 2019 |
| THE Vent Guys Ltd | Administrative & support | 2026 |
| Tindal Limited | Real estate | 2010 |
| Tiptop Works Ltd | Construction | 2025 |
| TMH Signs & Graphics Ltd | Professional & scientific | 2006 |
| Tocam Capital Limited | Professional & scientific | 1998 |
| TOM Hart Enterprises Limited | Manufacturing | 2014 |
| Toptoptekkers Ltd | Education | 2023 |
| Torax Services Ltd | Construction | 2021 |
| Total Environmental Services Ltd | Professional & scientific | 2017 |
| Total Mechanical and Electrical Ltd | Construction | 2025 |
| Totti Tattoo Ltd | Other services | 2018 |
| Townsend & Co Accountants Limited | Professional & scientific | 2006 |
| Treetops Pre-School (Burnham-On-Crouch) Limited | Education | 2011 |
| Trendline Window Cleaning Ltd | Administrative & support | 2022 |
| Trezor Trans Refrigerated Transport Ltd | Wholesale & retail | 2017 |