| Smolinski Trans Ltd | Transport & logistics | 2019 |
| Snydale Consultancy Limited | Professional & scientific | 2024 |
| SOCIALCARE4YOU Ltd | Health & social care | 2025 |
| Solo Cladding Services Ltd | Construction | 2022 |
| Sophizzy Limited | Real estate | 2023 |
| Sorceryspellsandpotions Ltd | Wholesale & retail | 2024 |
| Speed IT Services & Solution Ltd | Information & communication | 2023 |
| Spice Dash Ltd | Hospitality | 2024 |
| Spinners Methley Limited | Hospitality | 2025 |
| Sports Horse Yorkshire Limited | Arts & recreation | 2018 |
| SRI UK Retail Ltd | Wholesale & retail | 2025 |
| Stanley Picture House Co.Limited(The) | Real estate | 1920 |
| Starltyte Services Limited | Administrative & support | 2020 |
| Stephen Cardwell Ltd | Real estate | 2016 |
| Stone Synergy Yorkshire Ltd | Construction | 2023 |
| Stringer Digital Limited | Information & communication | 2026 |
| Studioffe Limited | Manufacturing | 2023 |
| Sulls (UK) Ltd | Wholesale & retail | 2010 |
| Swallow's Cleaning Ltd | Administrative & support | 2021 |
| Swan Civil Engineering Ltd | Construction | 2019 |
| Swan Environmental Services Ltd | Construction | 2007 |
| Swandoo UK Ltd | Wholesale & retail | 2019 |
| Swift Solutions Group Limited | Professional & scientific | 2024 |
| Swifthanza Ltd | Transport & logistics | 2025 |
| Swish X Ltd | Real estate | 2020 |
| Swjpowerengineering Ltd | Professional & scientific | 2022 |
| Sykes Contracting Limited | Agriculture & fishing | 2020 |
| Sykes Holdings Limited | Financial services | 2022 |
| Sykes Produce Limited | Agriculture & fishing | 2020 |
| Szczepanski Ltd | Transport & logistics | 2012 |
| T&T Nails and Beauty Ltd | Other services | 2024 |
| T-Maria Limited | Transport & logistics | 2015 |
| T4L Training Limited | Education | 2026 |
| Tadhunter Engineering Ltd | Professional & scientific | 2019 |
| TARN51 Brewing Company Limited | Manufacturing | 2015 |
| Taylor-Made Property & Rentals Limited | Real estate | 2019 |
| TAZ Tech Services Ltd | Information & communication | 2024 |
| Technik Events Limited | Other services | 2023 |
| Tecsys Europe Limited | Administrative & support | 2005 |
| Teenymarty Ltd | Information & communication | 2024 |
| Temp Station (Logistics) Ltd. | Transport & logistics | 2013 |
| Temp Station (Midlands) Ltd. | Administrative & support | 2014 |
| Temp Station Ltd | Administrative & support | 2012 |
| THE Bricklayers Outside Catering Limited | Hospitality | 2026 |
| THE Catchpenny Fitzwilliam Limited | Hospitality | 2025 |
| THE Chuffin Puffin Ltd | Construction | 2012 |
| THE Craft Booze Company Ltd | Wholesale & retail | 2020 |
| THE Crafty Couple Ltd | Wholesale & retail | 2018 |
| THE Eltermere Inn Ltd | Hospitality | 2017 |
| THE Freeston Academy | Education | 2011 |
| THE Normanton Freeston Foundation Sports CIC | Arts & recreation | 2026 |
| THE Office Campus (Paragon) Limited | Administrative & support | 2006 |
| THE Saviour Trust | Health & social care | 2007 |
| THE Squires Collection Ltd | Wholesale & retail | 2025 |
| THE Tony Sadler Foundation | Professional & scientific | 2024 |
| THE Vaping Bar Limited | Wholesale & retail | 2014 |
| THE Wastecare Environmental Trust | Health & social care | 2012 |
| THE Yorkshire Refurb Company Ltd | Construction | 2020 |
| THE Zoom Genie Ltd | Professional & scientific | 2017 |
| Thompson & SON Holdings Limited | Real estate | 2022 |
| THY Healthy Hub CIC | Education | 2025 |
| TK Crown Property UK Ltd | Real estate | 2026 |
| TOC Yorkshire Limited | Hospitality | 2026 |
| Tocc Catering Limited | Hospitality | 2026 |
| Tonotempo Limited | Arts & recreation | 2024 |
| Total Racking Solutions Limited | Manufacturing | 2016 |
| Town Street Beeston Management Company Limited | Extraterritorial | 2007 |
| Trackhire Solutions Ltd | Administrative & support | 2011 |
| Triple O Consultancy Ltd | Hospitality | 2016 |
| Tristar Cleaning Products UK Ltd | Manufacturing | 2018 |
| Truline Logistics Limited | Transport & logistics | 2019 |
| TTS Consulting Ltd | Administrative & support | 2025 |
| TU Casa Property Management Ltd | Real estate | 2023 |
| Twenty Three Developments Ltd | Real estate | 2019 |
| Tycro Investments Ltd | Real estate | 2025 |
| Tyres Hub Normanton Ltd | Wholesale & retail | 2025 |
| U Zdzicha Polish Shop Ltd | Wholesale & retail | 2022 |
| UK Hearing Limited | Wholesale & retail | 2020 |
| Ultimate Heights Limited | Construction | 2023 |
| Ultra Health Ltd | Wholesale & retail | 2004 |
| Undiscovered Escapes Ltd | Administrative & support | 2021 |
| Unicorn Carlton Limited | Hospitality | 2025 |
| Uniq by Nature Ltd | Extraterritorial | 2017 |
| Unique Mini Market Ltd | Wholesale & retail | 2024 |
| Unity Reach Ltd | Professional & scientific | 2024 |
| Universal Life Technology Ltd | Professional & scientific | 2015 |
| Unlock Your Physique Limited | Arts & recreation | 2017 |
| Uplift Power Platforms Limited | Extraterritorial | 2001 |
| Uplift Power Platforms Trustee Company Limited | Extraterritorial | 2005 |
| Urban Lockers Ltd | Wholesale & retail | 2023 |
| URBAN62 Ltd | Extraterritorial | 2018 |
| UTN Training Limited | Extraterritorial | 2013 |
| V & B Farming Limited | Agriculture & fishing | 2025 |
| V&G Transport Ltd | Transport & logistics | 2026 |
| VA Gardening & Landscaping Ltd | Construction | 2023 |
| Vaplas Limited | Manufacturing | 1993 |
| Vectorhead Ltd | Information & communication | 2015 |
| Vehicle Vision Online Ltd | Information & communication | 2016 |
| Veracity Systems Limited | Information & communication | 2001 |
| Vibezity Ltd | Information & communication | 2025 |