| Swanland Water Tower Management Company Limited | Households | 2017 |
| Swanlaw Ltd | Professional & scientific | 2010 |
| Sweet AS YOU Like UK Limited | Wholesale & retail | 2022 |
| Synbiotic UK Limited | Health & social care | 2023 |
| T&N Construction Limited | Financial services | 2023 |
| T. Armitage Limited | Administrative & support | 2002 |
| Tall Tree Homes Limited | Real estate | 2009 |
| Tardis Consultancy Limited | Professional & scientific | 2013 |
| TAY Management Ltd | Hospitality | 2019 |
| THE Aditev Connect Ltd | Health & social care | 2026 |
| THE Bellhouse Group Limited | Professional & scientific | 2000 |
| THE Education Alliance | Education | 2011 |
| THE Evangelical Trust Limited | Health & social care | 1931 |
| THE Godber Theatre Foundation CIC | Arts & recreation | 2020 |
| THE Hazard Collection Company Ltd | Professional & scientific | 2026 |
| THE Highfield House and Grounds LLP | | 2016 |
| THE Matrescence Project Limited | Education | 2023 |
| THE Music LAB Entertainment Agency Ltd | Arts & recreation | 2024 |
| THE Squirrels Management Company (North Ferriby) Limited | Households | 2004 |
| THE Treehouse Nature Nurseries Ltd | Education | 2025 |
| Theodore and Raffy Ltd | Wholesale & retail | 2022 |
| Thomas Odonnell Holdings Ltd | Construction | 2023 |
| Tidesway Limited | Professional & scientific | 2024 |
| Tilly France Heritage Homes Limited | Construction | 2025 |
| Time Square 81 Ltd | Health & social care | 2024 |
| Titan Heating & Plumbing Services Ltd | Construction | 2018 |
| Transwaste Motoring Services Limited | Administrative & support | 2013 |
| TSR Energy Solutions Limited | Other services | 2024 |
| Tuber Produce Limited | Wholesale & retail | 2017 |
| Turner Clifford Limited | Administrative & support | 2022 |
| Turpin Accounting Services Limited | Professional & scientific | 2013 |
| TVS Empire Ltd | Manufacturing | 2019 |
| TWH Associates Ltd | Construction | 2014 |
| Tyrescope Limited | Information & communication | 2013 |
| U.D Consulting Ltd | Administrative & support | 2016 |
| UK Cement Services Ltd | Wholesale & retail | 2023 |
| Unity Document Solutions Limited | Administrative & support | 2021 |
| Unplugged Coaching Limited | Other services | 2025 |
| Vascu RAD Limited | Health & social care | 2025 |
| VAT Digital Property Limited | Real estate | 2025 |
| Vehicle Procurements Ltd. | Administrative & support | 2011 |
| Venkat Srinivasan Limited | Health & social care | 2018 |
| Venus Stone Ltd | Wholesale & retail | 2016 |
| Victoria Race Limited | Arts & recreation | 2023 |
| VIEW10 Services Ltd | Health & social care | 2019 |
| Vittle Brands Ltd | Manufacturing | 2019 |
| VOW Group Ltd | Wholesale & retail | 2023 |
| Vulcan Aluminium Limited | Construction | 1997 |
| Vulcan Windows Limited | Construction | 1989 |
| Wallis Locums Limited | Wholesale & retail | 2008 |
| Walsh Taylor Business & Corporate Recovery Specialists Limited | Professional & scientific | 2008 |
| Wandworld Limited | Information & communication | 2014 |
| WAR1 Ltd | Manufacturing | 2015 |
| Wastage Waste Management Limited | Water & waste | 2014 |
| Wastege Waste Management Limited | Water & waste | 2007 |
| Wauldby Associates Limited | Professional & scientific | 2010 |
| Wazirimedics Ltd | Health & social care | 2026 |
| WCS Enterprises Ltd | Information & communication | 2004 |
| WE ARE the Office Limited | Manufacturing | 2019 |
| Webster's Properties Ltd | Real estate | 2018 |
| West END Management Services Limited | Real estate | 1979 |
| West Garth Farm Limited | Agriculture & fishing | 2011 |
| Westgates Holdings Limited | Financial services | 2023 |
| Westgates Restructuring Limited | Professional & scientific | 2019 |
| Westpark Living Limited | Construction | 2015 |
| Whitehead Property Limited | Construction | 2021 |
| Wilbco 1 Limited | Transport & logistics | 2016 |
| Wilbco 2 Limited | Administrative & support | 2016 |
| Willerby Property Limited | Real estate | 2009 |
| William Hobson Limited | Manufacturing | 1971 |
| Willinghams Transport Ltd | Transport & logistics | 2026 |
| Wilma T Healthcare Limited | Health & social care | 2015 |
| Wise Training Streetworks & Construction Limited | Education | 2013 |
| Woodgates Accountancy Limited | Professional & scientific | 2016 |
| Woodgates Homes Limited | Construction | 2017 |
| Woodgates Investment Holdings Ltd | Professional & scientific | 2018 |
| Woodgates Properties Ltd | Real estate | 2020 |
| Woodlands Investment Properties Ltd | Real estate | 2024 |
| World Domination Limited | Arts & recreation | 2023 |
| Worldwide Panels Limited | Professional & scientific | 2023 |
| Wtad Limited | Professional & scientific | 2022 |
| YKT Projects Ltd | Real estate | 2025 |
| Yonder Ventures Ltd | Professional & scientific | 2021 |
| Yorkare (Scarborough) Limited | Construction | 2025 |
| Yorkare Homes (Boston) Limited | Construction | 2026 |
| Yorkare Homes (Dronfield) Limited | Health & social care | 2026 |
| Yorkare Homes (Dronsfield) Limited | Health & social care | 2026 |
| Yorkare Homes (Wigston Prop) Limited | Construction | 2026 |
| Yorks Stratford Limited | Hospitality | 2019 |
| Yorkshire Commercial Services Limited | Real estate | 2005 |
| Yorkshire Hard Metal's Limited | Construction | 2022 |
| Yorkshire Head and Neck Limited | Health & social care | 2021 |
| Yorkshire Specialist Cars Ltd | Wholesale & retail | 2019 |
| YOU Snooze Ltd | Health & social care | 2021 |
| Your CFO Ltd | Professional & scientific | 2018 |
| Ziant Limited | Professional & scientific | 2015 |
| Zuno Limited | Wholesale & retail | 2025 |