| Stella Nova Management Services Limited | Real estate | 2006 |
| Stellar Coaching Ltd | Professional & scientific | 2021 |
| Stelmar Properties Ltd | Real estate | 2025 |
| Stemp Holdings Ltd | Financial services | 2026 |
| Stemp Ltd | Professional & scientific | 2026 |
| Step Together Dance Academy Ltd | Education | 2021 |
| Sterilab UK Ltd | Manufacturing | 2015 |
| Stevens Roofing and Building Ltd | Construction | 2015 |
| Stewart Inter Sea Ltd | Transport & logistics | 2013 |
| Stillarc Site Services Ltd | Manufacturing | 2023 |
| STM Developments Ltd | Construction | 2013 |
| Stone Cold Estates Limited | Real estate | 2016 |
| Stoneworld Paving Ltd | Administrative & support | 2025 |
| Stop & Shop (LS) Ltd | Wholesale & retail | 2026 |
| Strobe Capital Ltd | Professional & scientific | 2024 |
| Strobe Consultancy Ltd | Professional & scientific | 2024 |
| Style Stagers Ltd | Wholesale & retail | 2025 |
| Stylized Ltd | Construction | 2020 |
| SUE Earl Care Consultancy Limited | Other services | 2022 |
| Sugar Property Development Limited | Construction | 2025 |
| Sugar Property Holdings Limited | Real estate | 2025 |
| Suiteoffer Limited | Professional & scientific | 1994 |
| Summit Dental Solutions Ltd | Health & social care | 2014 |
| Sun Moon Bright Limited | Real estate | 2020 |
| Sundawn Properties Ltd | Real estate | 2024 |
| Sunshine on Katrine Ltd | Health & social care | 2024 |
| Supplystream Limited | Wholesale & retail | 2025 |
| Supreme Solar Ltd | Manufacturing | 2025 |
| Sure Business Ltd | Wholesale & retail | 2020 |
| Surediamond Limited | Health & social care | 2024 |
| Sureseal Waterproofing Ltd | Construction | 2025 |
| Sustique Limited | Wholesale & retail | 2024 |
| Sutida K. Dental Excellence Group Ltd | Health & social care | 2026 |
| Sutton Groundworks Limited | Construction | 2020 |
| Suvo Assets Ltd | Real estate | 2017 |
| SW Dent Ltd | Health & social care | 2025 |
| Swansea Regional Anaesthesia Training Ltd | Education | 2022 |
| Sweenie's Transport and Courier Services Ltd | Transport & logistics | 2020 |
| Sweet Bronze Ltd | Wholesale & retail | 2025 |
| Sweet Treats Corner Limited | Wholesale & retail | 2024 |
| Swim HUT Hoylake Ltd | Arts & recreation | 2022 |
| Swim Success Limited | Arts & recreation | 2013 |
| Symphony Smiles Ltd | Health & social care | 2024 |
| Syncgenius Innovations Ltd | Information & communication | 2024 |
| Syntol Holdings Limited | Financial services | 2024 |
| Syntol Limited | Wholesale & retail | 2019 |
| Syon Care Group Ltd | Health & social care | 2025 |
| T Hindle Consulting Limited | Professional & scientific | 2019 |
| T Richards Holdings Limited | Financial services | 2023 |
| T Sangar Trading Ltd | Health & social care | 2022 |
| T&C Bedrooms Ltd | Manufacturing | 2014 |
| T&N Global Food Ltd | Hospitality | 2021 |
| Tadasa Ltd | Wholesale & retail | 2025 |
| Taflod Limited | Health & social care | 2026 |
| Tailored Smiles Real Estate Limited | Real estate | 2024 |
| Tailored Smiles Worksop Limited | Health & social care | 2025 |
| Take the Cake Productions Limited | Information & communication | 2014 |
| Talia & Matia Ltd | Health & social care | 2025 |
| Tanzanite Business Support Ltd | Administrative & support | 2024 |
| Taowen Ltd | Health & social care | 2022 |
| Tapam UK PVT Ltd | Health & social care | 2024 |
| Tarporley Kebab House Ltd | Other services | 2025 |
| Tastyboxmeal Ltd | Hospitality | 2019 |
| Tatams Testing Ltd | Professional & scientific | 2013 |
| Tatao Property Management Limited | Real estate | 2018 |
| Taxalarm Limited | Professional & scientific | 2002 |
| Taxation & Accountancy Services (Crewe) Ltd | Financial services | 2024 |
| Taxation & Accountancy Services (Shrewsbury) Ltd | Financial services | 2023 |
| Taxation & Accountancy Services (Wirral) Ltd | Extraterritorial | 2019 |
| Taxation & Accountancy Services Limited | Professional & scientific | 2007 |
| Taxi Chris Ltd | Transport & logistics | 2026 |
| Taylor Roberts & Associates Limited | Professional & scientific | 2007 |
| TB Performance Centre Ltd | Arts & recreation | 2025 |
| TB Property Group Ltd | Hospitality | 2025 |
| TD Pro Group Ltd | Construction | 2026 |
| TD Retail Stores Limited | Wholesale & retail | 2026 |
| Teamgt Aviation Ltd | Administrative & support | 2022 |
| Technical Credentials Ltd | Information & communication | 2026 |
| Tectronic Ltd | Construction | 2004 |
| TED Jacobs Education Ltd | Education | 2025 |
| TED Medical Ltd | Wholesale & retail | 2017 |
| Tekin Property Management Ltd | Construction | 2025 |
| Tekzor Ltd | Information & communication | 2026 |
| Tempus Construction Team Ltd | Construction | 2025 |
| Tero Properties Limited | Real estate | 2024 |
| Tero&Co Properties Limited | Real estate | 2026 |
| Terry & Co Hair Ltd | Other services | 2023 |
| Tetric Services Limited | Health & social care | 2021 |
| Texprint Surfacing Ltd | Construction | 2012 |
| TH Endo Ltd | Health & social care | 2025 |
| Thafe Limited | Extraterritorial | 2023 |
| Tharnwipa Limited | Hospitality | 2018 |
| THE Alexander Beard Group of Companies Limited | Financial services | 1987 |
| THE Arch Care Leavers Ltd | Health & social care | 2024 |
| THE Bangkok Wellness Ltd | Other services | 2025 |
| THE Beyond Recovery Project CIC | Other services | 2023 |
| THE Big Ideas Studio Ltd | Education | 2026 |
| THE Blue Reef Leisure Company Limited | Arts & recreation | 2000 |
| THE Boutique Atelier Property Management Limited | Real estate | 2025 |
| THE Boutique Salon Limited | Other services | 2007 |