| Sureweld Fabrications Limited | Manufacturing | 2017 |
| Surface Science Solutions Limited | Professional & scientific | 2021 |
| Surventrix Systems Limited | Administrative & support | 2007 |
| Sustainability Vision Limited | Information & communication | 2015 |
| Sustein Ltd | Information & communication | 2011 |
| Sutton and Vale Ltd | Hospitality | 2022 |
| Sutton-Grant Business Consultants Ltd | Professional & scientific | 2024 |
| Suzana Collection Limited | Households | 2022 |
| SV Business Services Limited | Professional & scientific | 2009 |
| SVS Training Ltd | Professional & scientific | 2017 |
| Swadlincote Clutch and Service Limited | Wholesale & retail | 2019 |
| Swadsmiles Ltd | Health & social care | 2014 |
| Swahili Talks Media Limited | Professional & scientific | 2023 |
| Swains Electrical Services Ltd | Construction | 2015 |
| Swan Realtor Limited | Hospitality | 2021 |
| Swan Tutoring Ltd | Education | 2025 |
| Swanel Ltd | Real estate | 2019 |
| Sweet Botanique Limited | Manufacturing | 2026 |
| Sweet-Smith Properties Ltd | Real estate | 2025 |
| Swim England East Midlands Ltd | Education | 2020 |
| Swim England East Region | Arts & recreation | 2020 |
| Swim England London Limited | Education | 2022 |
| Swim England Trading Limited | Wholesale & retail | 1994 |
| Swim England West Midland Region Limited | Arts & recreation | 2020 |
| Swim Inspiration Ltd | Arts & recreation | 2013 |
| Swimming Championships Limited | Arts & recreation | 2014 |
| Swimwithjo Ltd | Extraterritorial | 2025 |
| Swimzi Limited | Wholesale & retail | 2015 |
| Switch Media Walls Limited | Construction | 2025 |
| Swithland Contracting Limited | Construction | 2020 |
| Swithland Court Limited | Real estate | 1986 |
| Swithland Groundworks Ltd | Construction | 2023 |
| Swithland Homes Limited | Construction | 2014 |
| Swithland Logistics Consultancy Limited | Professional & scientific | 2026 |
| Swithland Spring Water Limited | Manufacturing | 1998 |
| Swithlands Ltd | Administrative & support | 2017 |
| Sylves Limited | Health & social care | 2023 |
| Synergy Executive Search Ltd | Financial services | 2023 |
| Syngrapha Limited | Information & communication | 2005 |
| Syscam Fire and Security Limited | Administrative & support | 2008 |
| Syscam Limited | Administrative & support | 2008 |
| Systagenix Wound Management, Limited | Administrative & support | 2008 |
| System Development Services Ltd | Information & communication | 2023 |
| Systemaflow Ltd | Information & communication | 2025 |
| Szabo Software and Engineering. UK. Ltd. | Information & communication | 2000 |
| SZN Holdings Ltd | Professional & scientific | 2026 |
| T & C Drainage Services Limited | Water & waste | 2007 |
| T & F Hing Limited | Agriculture & fishing | 2024 |
| T C Dunbar Limited | Professional & scientific | 2009 |
| T C T Catering Ltd | Hospitality | 2019 |
| T M E Financial Consultancy Limited | Administrative & support | 2015 |
| T S Tech Support Ltd | Information & communication | 2026 |
| T Tech Towbars Ltd | Wholesale & retail | 2023 |
| T&D FP Ltd | Real estate | 2020 |
| T&S Construction (Midlands) Ltd | Construction | 2024 |
| T&T Asset Construction Ltd | Construction | 2022 |
| T&T Asset Development - Derby Market Place Ltd | Real estate | 2022 |
| T&T Asset Development - Forester House Ltd | Construction | 2022 |
| T&T Asset Development - Market Street Ltd | Construction | 2023 |
| T&T Asset Development - SGI Ltd | Construction | 2022 |
| T&T Asset Development Ltd | Construction | 2021 |
| T&T Assets Group Ltd | Real estate | 2021 |
| T&T Assets Ltd | Construction | 2020 |
| T-Rex Cleaning Services Ltd | Administrative & support | 2024 |
| T. I. Mechanical Services Limited | Wholesale & retail | 2024 |
| T.Bailey IT Ltd. | Extraterritorial | 2014 |
| T.Mat Engineering Ltd | Manufacturing | 2023 |
| T2FIVE Ltd | Wholesale & retail | 2022 |
| Tabella Holdings Limited | Financial services | 2023 |
| Tabella House Cafes Ltd | Hospitality | 2012 |
| Table for YOU Ltd | Information & communication | 2023 |
| Tablefy UK Limited | Professional & scientific | 2020 |
| TAC Properties Ltd | Real estate | 2020 |
| Tactile Intentions Ltd | Professional & scientific | 2026 |
| Taggles Woof Stuff Ltd | Extraterritorial | 2022 |
| Tagteamtcg Ltd | Wholesale & retail | 2026 |
| Taherpharma Ltd | Wholesale & retail | 2021 |
| TAI FAT C & C Limited | Wholesale & retail | 2013 |
| Tailormade Wimbledon Debentures Limited | Administrative & support | 2011 |
| Tails Studio Limited | Information & communication | 2024 |
| Take ME ( Merseyside ) Group Ltd | Transport & logistics | 2025 |
| Take ME Darlington Ltd | Transport & logistics | 1984 |
| Take ME Group (Birmingham) Limited | Transport & logistics | 2022 |
| Take ME Group Ltd | Transport & logistics | 2025 |
| Take ME Holdings Ltd | Transport & logistics | 2019 |
| Take ME Investments Limited | Real estate | 2023 |
| Take ME Limited | Administrative & support | 2023 |
| Take ME Rental Ltd | Administrative & support | 2026 |
| Talk Longer Limited | Information & communication | 2008 |
| Talk-Events Ltd | Professional & scientific | 2008 |
| Tall Trees Properties Ltd | Real estate | 2022 |
| Tamam Estates Ltd | Real estate | 2025 |
| Tamamion Limited | Information & communication | 2025 |
| Tame Design Ltd | Information & communication | 2010 |
| Tandoori Empire SHR Limited | Hospitality | 2016 |
| Tangerine Equine | Financial services | 2017 |
| Tanning House by Miami Sun Limited | Other services | 2024 |
| Tanzanite Real Estate Ltd | Real estate | 2023 |
| Taob Holdings Limited | Financial services | 2026 |
| TAP Chaps Ltd | Arts & recreation | 2024 |