| Swim Scene Ltd | Education | 2021 |
| Swimmers ED Ltd | Education | 2024 |
| Swimming Pool Maintenance Limited | Administrative & support | 2023 |
| Swissland DEV Limited | Real estate | 2026 |
| Switch Electrical Residential & Commercial Ltd | Construction | 2019 |
| SWL Solutions Ltd | Wholesale & retail | 2025 |
| Sword Security Services Ltd | Administrative & support | 2025 |
| Swordward Limited | Manufacturing | 1981 |
| SXB Design Limited | Professional & scientific | 2012 |
| Sylverstone Care Ltd | Health & social care | 2023 |
| Symo Services Ltd | Administrative & support | 2022 |
| Symphoniq Ltd | Professional & scientific | 2025 |
| Synergie AVS Ltd | Administrative & support | 2021 |
| Synergize Consulting Ltd | Administrative & support | 2002 |
| Synergy Prime Limited | Administrative & support | 2012 |
| Synq Care Ltd | Administrative & support | 2025 |
| Syntek IT Solutions Ltd | Information & communication | 2019 |
| Syntinex Ltd | Administrative & support | 2011 |
| Syrei Holding UK Limited | Professional & scientific | 2001 |
| Systems Secure Limited | Information & communication | 2010 |
| SZ Guarding Ltd | Financial services | 2025 |
| Szter Group Limited | Transport & logistics | 2015 |
| T & N Mots Limited | Wholesale & retail | 2015 |
| T & P Motors Ltd | Wholesale & retail | 2025 |
| T C Garage Limited | Wholesale & retail | 2017 |
| T Halama Solutions Ltd | Manufacturing | 2026 |
| T J'S Loft Limited | Other services | 2006 |
| T K Building Services Ltd | Construction | 2015 |
| T M C Technical Servics Limited | Manufacturing | 2012 |
| T T Heating Limited | Construction | 2012 |
| T&A Property&Maintenance Ltd | Transport & logistics | 2018 |
| T&Be Ltd | Professional & scientific | 2018 |
| T&L Pet Services Ltd | Other services | 2015 |
| T&S Waste Limited | Wholesale & retail | 2023 |
| T&T Group International Limited | Administrative & support | 2022 |
| T.G. Gric Transport Ltd | Transport & logistics | 2019 |
| T.H.Gorringe(Charlwood)Limited | Wholesale & retail | 1960 |
| T.R.U.S.T. Electrical and Building Services Ltd | Construction | 2014 |
| Taang Trading Co. Ltd | Wholesale & retail | 2026 |
| Taarkshya Ltd | Wholesale & retail | 2018 |
| Taas Aviation Ltd | Education | 2021 |
| Tactical Tables Ltd | Other services | 2026 |
| TAD247 Power & Security Ltd | Extraterritorial | 2026 |
| Taghi and KIA Limited | Health & social care | 2007 |
| TAH Holdings Limited | Financial services | 2020 |
| Tahir Group of Companies Ltd | Wholesale & retail | 2025 |
| Taimur Limited | Information & communication | 2025 |
| Tairah Twine Company Limited | Health & social care | 2018 |
| TAK Properties Limited | Real estate | 2020 |
| Taled Ltd | Information & communication | 2024 |
| Talented People Solutions Commercial Limited | Administrative & support | 2016 |
| Talkcargo Ltd | Transport & logistics | 2015 |
| Talus Technical Services Ltd. | Administrative & support | 2019 |
| Tamasha Catering Limited | Hospitality | 2024 |
| Tamasha Restaurant Limited | Hospitality | 2019 |
| Tamashah Limited | Hospitality | 2025 |
| Tamashah Mehfil Limited | Hospitality | 2026 |
| Tamber Financial Group Limited | Financial services | 2026 |
| Tamber Financial Limited | Financial services | 2024 |
| Tamber Group Limited | Financial services | 2021 |
| Tamber Properties & Real Estate Limited | Real estate | 2021 |
| Tamber Properties Limited | Real estate | 2021 |
| Tamil Learning Centre Crawley | Health & social care | 2013 |
| Tamil Saloon Crawley Limited | Other services | 2025 |
| Tamlin Ltd | Wholesale & retail | 2026 |
| TAN & Lash Ltd | Other services | 2026 |
| TAN Media Limited | Administrative & support | 2010 |
| Tandoo’S Limited | Hospitality | 2024 |
| Tangible Hands Care Solutions Ltd | Professional & scientific | 2014 |
| Tangra Fleet Ltd | Transport & logistics | 2024 |
| Tanti Ltd | Wholesale & retail | 2019 |
| Tanxiety Limited | Other services | 2025 |
| Tapley Group Ltd | Construction | 2018 |
| Tappy Solutions Ltd | Professional & scientific | 2023 |
| Tara IT Services Ltd | Information & communication | 2022 |
| Tara Supplies Ltd | Wholesale & retail | 2016 |
| Tarana Turners Hill Ltd | Hospitality | 2026 |
| Target Express Holdings Limited | Professional & scientific | 2000 |
| Target Express Limited | Extraterritorial | 1997 |
| Target Express Parcels Limited | Extraterritorial | 1982 |
| Tariq & Qamar Enterprises Ltd | Administrative & support | 2025 |
| Tasleem Limited | Health & social care | 2025 |
| Taste of Crawley Ltd | Hospitality | 2026 |
| Taste of Lanka Ltd | Hospitality | 2025 |
| Tasty Buzz Limited | Hospitality | 2022 |
| Tasty Lightbox Ltd | Hospitality | 2018 |
| Taurus DRS Ltd | Administrative & support | 2015 |
| Taurus Fire Protection Ltd | Construction | 2025 |
| Tausigma Limited | Information & communication | 2014 |
| Taxave Accountancy Limited | Professional & scientific | 2020 |
| Taxave Business Centre Limited | Extraterritorial | 2006 |
| Taxave Limited | Professional & scientific | 2020 |
| Taxnex Ltd | Professional & scientific | 2025 |
| Taylor Rose Racing Ltd | Arts & recreation | 2018 |
| Taylor Rossi Homes Ltd | Construction | 2007 |
| TB & Sons Property Limited | Real estate | 2024 |
| TB2 Aerospace (UK) Limited | Administrative & support | 2025 |
| Tbonka Ltd | Wholesale & retail | 2026 |
| TC Cleanse Ltd | Administrative & support | 2024 |
| TC Land and New Homes Ltd | Real estate | 2013 |