| Ssjm Properties Limited | Real estate | 2026 |
| SSR Sprayless Scratch Repair Ltd | Manufacturing | 2020 |
| Stackhouse and Cave Limited | Professional & scientific | 2013 |
| Staddlethorpe Barns (Management) Limited | Households | 2023 |
| Stanley Mechanical Company Ltd | Construction | 2021 |
| Star Maths Tuition Ltd | Education | 2023 |
| Starkrowe Properties Ltd | Real estate | 2024 |
| Starup Management Limited | Arts & recreation | 2025 |
| Stevensbrook Finance Limited | Financial services | 2019 |
| Stevenson Commercials Ltd | Wholesale & retail | 2021 |
| STH Retail Consultants Limited | Real estate | 2024 |
| Sticky Baits Ltd | Manufacturing | 2012 |
| Stone and Precast Limited | Wholesale & retail | 2014 |
| Stonecustoms Ltd | Construction | 2022 |
| STONES2HOMES Ltd | Wholesale & retail | 2025 |
| Storage & Handling Limited | Professional & scientific | 2011 |
| Stratagem Intelligent Income Strategies Ltd | Financial services | 2013 |
| Stuart Sutton Defence Lawyer Ltd. | Professional & scientific | 2018 |
| Studio Fitness Ltd | Arts & recreation | 2024 |
| Stumwood C.N.C. Services Ltd | Information & communication | 1998 |
| Subeat Limited | Hospitality | 2023 |
| Summer Nails Goole Ltd | Other services | 2025 |
| Summit 4 Limited | Professional & scientific | 2006 |
| Sunny Bliss Limited | Other services | 2017 |
| Sunrise Plants Limited | Wholesale & retail | 2015 |
| Super Nova Barber Limited | Other services | 2025 |
| Superlingo Ltd | Education | 2017 |
| Sure & Steadfast Consultancy Limited | Professional & scientific | 2023 |
| SW Cleaning (York) Ltd | Administrative & support | 2024 |
| Swan Build Limited | Construction | 2020 |
| Sweeting Brothers (Land Drainage) Limited | Water & waste | 1971 |
| Sweeting Brothers (Pallet & Timber Supplies) Limited | Manufacturing | 2008 |
| Sweyne Coaches Ltd | Transport & logistics | 2018 |
| Sycamores Retreat Limited | Real estate | 2017 |
| Sykehouse Arena Equestrian Centre Limited | Arts & recreation | 2015 |
| Sykes Farms Yorkshire Ltd | Agriculture & fishing | 2024 |
| Syps (UK) Ltd | Agriculture & fishing | 2012 |
| Systemwash (UK) Limited | Manufacturing | 1996 |
| T & K Cladding Contractors Ltd | Construction | 2015 |
| T J Greenwood Limited | Agriculture & fishing | 2012 |
| T J R M Holdings Limited | Financial services | 2017 |
| T&E Garden Services Limited | Administrative & support | 2025 |
| T'Can Cleaning Service Limited | Administrative & support | 2020 |
| T.J. Brown Motor Engineer Limited | Manufacturing | 2003 |
| T.W.Falkingham Limited | Agriculture & fishing | 1959 |
| TA Mechanical Services Ltd | Wholesale & retail | 2020 |
| TAN Luxe Ltd | Other services | 2023 |
| Tanglewood Environmental Limited | Professional & scientific | 2013 |
| TAR Delivery Services Ltd | Transport & logistics | 2025 |
| Taste of China (Goole) Ltd | Hospitality | 2025 |
| Tattersall Tipping Company Ltd | Administrative & support | 2017 |
| Taylored Accountancy Services Ltd | Professional & scientific | 2022 |
| Taylormade Lifting Solutions Limited | Construction | 2025 |
| TB Lift Tech Ltd | Construction | 2026 |
| TBR Racing Ltd | Wholesale & retail | 2013 |
| TC Tech Ltd | Wholesale & retail | 2024 |
| TDM Surfacing Ltd | Construction | 2024 |
| TEAMWORK4U Ltd | Transport & logistics | 2019 |
| Technical and Analytical Services Limited | Professional & scientific | 1973 |
| Technikraft Holdings Limited | Financial services | 2018 |
| Technikraft Limited | Manufacturing | 1987 |
| Techxperts Recruitment Ltd | Information & communication | 2023 |
| Tecnica Education Limited | Arts & recreation | 2016 |
| Tejm Ltd | Real estate | 2020 |
| TF Operations Ltd | Professional & scientific | 2024 |
| TFC Web Solutions Ltd | Information & communication | 2014 |
| THE 4 Group (UK) Ltd | Real estate | 2014 |
| THE Adhd Accountant Limited | Professional & scientific | 2024 |
| THE Aesthetic Accounting Academy Limited | Administrative & support | 2021 |
| THE Aesthetics Accountant Limited | Professional & scientific | 2023 |
| THE Analytics & BI Company Ltd | Information & communication | 2020 |
| THE Barn Candle Company Ltd | Manufacturing | 2020 |
| THE Bathroom Basement Ltd | Wholesale & retail | 2020 |
| THE Big Bale Company (North) Limited | Wholesale & retail | 1984 |
| THE Bucket List Burgers Ltd | Hospitality | 2024 |
| THE Buffet Company (York) Limited | Hospitality | 2025 |
| THE Butterfly Confectionery Co. Limited | Wholesale & retail | 2020 |
| THE Carisbrooke Road Freehold Company Limited | Real estate | 2005 |
| THE Carriage Master Repatriation Ltd | Other services | 2023 |
| THE Cete Group Ltd | Financial services | 2025 |
| THE Comfort Collective Limited | Hospitality | 2025 |
| THE Dairy Kick Company Limited | Manufacturing | 2015 |
| THE Darts Shop Ltd | Wholesale & retail | 2025 |
| THE Driveway & Paving Company Limited | Construction | 2018 |
| THE Escapologist Ltd | Arts & recreation | 2017 |
| THE First TEN Ltd | Education | 2026 |
| THE Flood Technology Group Ltd | Construction | 2023 |
| THE Flood Technology IP Group Ltd | Construction | 2023 |
| THE Green Heating Co (Hull) Limited | Construction | 2023 |
| THE Green Inn Hotel Limited | Hospitality | 2021 |
| THE Green Inn Restaurant Limited | Hospitality | 2016 |
| THE Gutter Doctor Group Limited | Other services | 2025 |
| THE Gutter Doctor Ltd | Administrative & support | 2026 |
| THE Hampshire Golf Club Limited | Administrative & support | 1997 |
| THE HOB Kitchens Ltd | Construction | 2020 |
| THE Hungry Nest Ltd | Hospitality | 2025 |
| THE Hutt Hybrid Gym Ltd | Arts & recreation | 2025 |
| THE Icecreamists Limited | Manufacturing | 2008 |
| THE Injection Clinic Ltd | Health & social care | 2024 |
| THE Jacket HUT Limited | Wholesale & retail | 2023 |