| SMR Global Group Limited | Financial services | 2021 |
| SNK Express Ltd | Wholesale & retail | 2013 |
| Softone Limited | Real estate | 2025 |
| Solarflare Pictures Limited | Arts & recreation | 2023 |
| Solas Electrical Services Limited | Construction | 2022 |
| Somena Limited | Professional & scientific | 2024 |
| Spa Dent Ltd | Health & social care | 2025 |
| SPC Realty Limited | Real estate | 2024 |
| Spicy's Halal Foods Limited | Wholesale & retail | 2002 |
| Sporting Connections Ltd | Administrative & support | 2011 |
| Sports Bikes International Limited | Wholesale & retail | 2020 |
| ST and SK Ltd | Wholesale & retail | 2025 |
| ST Gabriel Investments Limited | Real estate | 2016 |
| ST James Workshop Ltd | Real estate | 2019 |
| ST Tyres Limited | Wholesale & retail | 2024 |
| ST. Paul's Court (Freehold) Limited | Professional & scientific | 1995 |
| Star Life Fashion Ltd | Other services | 2024 |
| Sterling House Investments Limited | Real estate | 2020 |
| Sterling Property Consultants Limited | Real estate | 2013 |
| Sterling Sales & Lettings Limited | Extraterritorial | 2024 |
| Stockport Properties Limited | Real estate | 2025 |
| Stora Mancuso Limited | | 1973 |
| Storeys Co-Living Limited | Extraterritorial | 2021 |
| Storeys of London Limited | Real estate | 2017 |
| Stow Smiles Ltd | Education | 2024 |
| Street Fathers Global CIC | Public administration | 2026 |
| Suitable Homes and Offices Limited | Real estate | 2023 |
| Sun Records the Concert Intl Ltd | Arts & recreation | 2025 |
| Sun Recovery Ltd | Wholesale & retail | 2022 |
| Super Digital Solutions Limited | Information & communication | 2021 |
| Supportax Ltd | Professional & scientific | 2015 |
| Supreme Protection Holdings Ltd | Manufacturing | 2022 |
| Supreme Protection Limited | Administrative & support | 2013 |
| Supreme Residential Care Ltd | Health & social care | 2025 |
| Sydaxis Consulting Group Ltd | Professional & scientific | 2023 |
| T Morrison Consultant Limited | Manufacturing | 2024 |
| T.J.Huddle Limited | Real estate | 1971 |
| Tag&Co Ltd | Professional & scientific | 2020 |
| Talltogs Ltd | Wholesale & retail | 2023 |
| Taro Estates Ltd | Real estate | 2023 |
| Tasc Property Services Ltd | Construction | 2020 |
| TCB Communications Limited | Information & communication | 2015 |
| Teeba Clinics Ltd | Wholesale & retail | 2026 |
| Telecor Communications Limited | Wholesale & retail | 2019 |
| Telelink Communications Limited | Wholesale & retail | 2020 |
| Templetons Business Consultancy Services Ltd | Professional & scientific | 2024 |
| Tenr Property Limited | Construction | 2025 |
| Textrend Ltd | Wholesale & retail | 2018 |
| THE AXE and Ember Smokehouse Ltd | Hospitality | 2025 |
| THE Best Business Consultants Ltd | Professional & scientific | 2014 |
| THE Blooms Collective Consultancy Limited | Professional & scientific | 2026 |
| THE Boxer Worldwide Sports LLP | | 2025 |
| THE Cable People Ltd | Wholesale & retail | 2022 |
| THE Construction and Maintenance Group Ltd | Construction | 2022 |
| THE Crescent Hub Ltd | Professional & scientific | 2020 |
| THE Hoxton Trend Limited | Information & communication | 2020 |
| THE Indian MOM Ltd | Hospitality | 2023 |
| THE Lloyd Park Children's Charity | Education | 2003 |
| THE Number LAB Tutoring Ltd | Education | 2025 |
| THE Paddock Club Limited | Transport & logistics | 2026 |
| THE Road to Cheltenham Limited | Financial services | 2023 |
| THE Spyratous LLP | | 2020 |
| THE Village Store (C&J) Limited | Wholesale & retail | 2006 |
| THE Walthamstow & Chingford Almshouse Trustee Company Limited | Hospitality | 2007 |
| Theolord Limited | Real estate | 2019 |
| Thlayli Ventures Limited | Professional & scientific | 2024 |
| Thomas Realty Limited | Real estate | 2018 |
| Thorpe Hall Properties Limited | Real estate | 2016 |
| Tico Kitchens Ltd | Hospitality | 2025 |
| TLO Properties Limited | Real estate | 2020 |
| TMN Group Ltd | Real estate | 2016 |
| Top Flight Limited | Financial services | 2014 |
| Tottenham Pizza Spot Ltd | Hospitality | 2025 |
| Tppt Limited | Arts & recreation | 2016 |
| Training and Consultancy Services Limited | Information & communication | 2008 |
| Travel Away Ltd | Transport & logistics | 2026 |
| Tremae Properties Limited | Real estate | 2023 |
| Trewfrim Limited | Information & communication | 2017 |
| Triangle 4 Homes Limited | Real estate | 2002 |
| Tringles Holdings Ltd. | Real estate | 2015 |
| Trios Investments Ltd | Real estate | 2023 |
| Triton Holdings Limited | Professional & scientific | 2016 |
| Trlondon Digital Services Limited | Information & communication | 2024 |
| TS Commissioning Ltd | Professional & scientific | 2018 |
| Twenty Four Property Services Ltd | Real estate | 2006 |
| TWT Investments Ltd | Real estate | 2024 |
| UK Contracting CF98 Limited | Construction | 2015 |
| Ultrasound Company Limited | Health & social care | 2008 |
| Unique Double Glazing Ltd | Manufacturing | 2019 |
| Unit 1 Industries Limited | Arts & recreation | 1999 |
| Unit Location Services Ltd | Administrative & support | 2023 |
| Universal Hub Limited | Manufacturing | 2021 |
| Urban IQ Limited | Professional & scientific | 2006 |
| Urspacetoo Ltd | Other services | 2016 |
| UTY Motors Ltd | Wholesale & retail | 2019 |
| Valdon J Lake Limited | Arts & recreation | 2011 |
| Vapes 4 Everyone Ltd | Wholesale & retail | 2025 |
| Varvararozagalleries Ltd | Wholesale & retail | 2020 |
| Vent Coffee Limited | Hospitality | 2021 |
| Veritas Media Limited | Information & communication | 2021 |