| Tony Coyle Racing Limited | Arts & recreation | 2016 |
| Top View Country Park Limited | Hospitality | 2005 |
| TOT Stop PRE School & Early Years Centre Ltd | Education | 2004 |
| Total Property Compliance Ltd | Information & communication | 2026 |
| Total Security (Yorkshire) Limited | Construction | 2010 |
| Town Farm Developments Limited | Construction | 2015 |
| Towthorpe Farming Ltd | Agriculture & fishing | 2021 |
| Towthorpe Manor Sporting Club Limited | Arts & recreation | 2025 |
| TR19 Dust & Grease Ltd | Administrative & support | 2026 |
| Trade Vehicle Solutions Ltd | Wholesale & retail | 2023 |
| Tradeline (Combined Services) Ltd | Construction | 2013 |
| Tradevits Limited | Other services | 2016 |
| Traditional Interiors (Nafferton) Limited | Manufacturing | 2002 |
| Tranquil Times Limited | Households | 2022 |
| Transag Limited | Transport & logistics | 2003 |
| Treehouse Lettings Ltd | Real estate | 2020 |
| Tri-Pac Limited | Wholesale & retail | 2002 |
| Tubbs Payload Limited | Transport & logistics | 2016 |
| Turnbull Agricultural Ltd | Agriculture & fishing | 2019 |
| Turner Timber Engineering Limited | Manufacturing | 2013 |
| Twismo Financial Planning Limited | Financial services | 2005 |
| Twismo Group Limited | Professional & scientific | 2001 |
| Twisted Melon Merch Limited | Wholesale & retail | 2025 |
| Twofold House Ltd | Wholesale & retail | 2026 |
| Ufkes Greentec UK Limited | Agriculture & fishing | 2018 |
| UK Bars (Yorkshire) Limited | Hospitality | 2010 |
| UK Energy Partners Ltd | Construction | 2010 |
| UK Financial Planning Limited | Financial services | 2023 |
| UK Marine Brokers Ltd | Other services | 2023 |
| UK Risk Management Ltd | Administrative & support | 2022 |
| UK Worksurfaces Direct Ltd | Construction | 2025 |
| UK Worktops Direct Ltd | Professional & scientific | 2017 |
| Ullyott MTD Limited | Administrative & support | 2017 |
| Ullyotts (Bridlington) Limited | Real estate | 2015 |
| Ullyotts (Driffield) Limited | Real estate | 2011 |
| Ullyotts (Property Management) Limited | Households | 2024 |
| Ullyotts (Rural) Limited | Professional & scientific | 2018 |
| Uniball Limited | Wholesale & retail | 2005 |
| United Steel Fabrications Limited | Construction | 2019 |
| Upton PIG Producers Ltd | Agriculture & fishing | 2017 |
| Urban Hair Lounge Limited | Other services | 2015 |
| USP Products Limited | Wholesale & retail | 2008 |
| V Marshall & Sons Ltd | Administrative & support | 2018 |
| Vemotion Interactive Limited | Information & communication | 2004 |
| Verileads Limited | Information & communication | 2012 |
| Veterinary Care by DR Naomi Ltd | Professional & scientific | 2024 |
| Vida Support Ltd | Health & social care | 2024 |
| Viking Triking Limited | Administrative & support | 2008 |
| Villasardegna Limited | Real estate | 2023 |
| Vintage Toys Ltd | Wholesale & retail | 2026 |
| Vintagecocktailco Ltd | Hospitality | 2025 |
| Vinylfx Hull Limited | Manufacturing | 2024 |
| Vital Agency Limited | Information & communication | 2020 |
| Vive LE Velo Limited | Wholesale & retail | 2014 |
| Vizualise Management Ltd | Professional & scientific | 2024 |
| Voltic Energy Limited | Construction | 2023 |
| Vyta Health Holdings Limited | Professional & scientific | 2017 |
| Vyta Health Limited | Other services | 2016 |
| W & K Precision Engineering Limited | Manufacturing | 2003 |
| W Thurlow Limited | Administrative & support | 2015 |
| W.D.Sellers and Sons Limited | Agriculture & fishing | 1955 |
| W.Leslie Caley Limited | Agriculture & fishing | 1955 |
| WAA Wind Limited | Extraterritorial | 2014 |
| WAC Associates Ltd | Professional & scientific | 2017 |
| Walk Unlimited Ltd | Arts & recreation | 2008 |
| Walker's Eggs LLP | | 2026 |
| Waltridge Properties Ltd | Real estate | 2024 |
| Warboss Miniatures Ltd | Manufacturing | 2022 |
| Warcup Holdings Limited | Financial services | 2015 |
| Ward Property Insight Ltd | Real estate | 2025 |
| Warkup Holdings Ltd | Financial services | 2020 |
| Warleys Country Store Limited | Wholesale & retail | 2016 |
| Warleys Driffield Limited | Wholesale & retail | 2016 |
| Warleys Outdoor Living Limited | Wholesale & retail | 2016 |
| Warleysweb Ltd | Wholesale & retail | 2016 |
| Warm Beer and Lousy Food Limited | Hospitality | 2002 |
| Waste Services (Yorkshire) Limited | Water & waste | 2015 |
| Watermargin Restaurant Limited | Hospitality | 2018 |
| WE GOT Stealz Ltd | Wholesale & retail | 2026 |
| Welham Park Trout Farm (Malton) Limited | Agriculture & fishing | 2004 |
| Wellness Roots and Flourish Ltd | Other services | 2026 |
| Welton Bailey Design Ltd | Professional & scientific | 2026 |
| West Ella Finance Limited | Real estate | 1978 |
| West Ella Holdings Limited | Real estate | 1957 |
| Westfield House Farming Limited | Agriculture & fishing | 2011 |
| Westholme Properties Ltd | Real estate | 2024 |
| Westwood Construction (Beverley) Ltd | Construction | 2012 |
| Wharram Developments Limited | Construction | 2014 |
| Whin Hill Nurseries Limited | Wholesale & retail | 2018 |
| Whinmoor (Seacroft) Limited | Professional & scientific | 1938 |
| White Rose Properties (Driffield) Ltd | Real estate | 2016 |
| WHT Demolition Limited | Construction | 2020 |
| Wild at Heart Day Nursery Limited | Health & social care | 2019 |
| Wilderness Food Limited | Hospitality | 2018 |
| Williams Refinishing Ltd | Wholesale & retail | 2021 |
| Willow Tree Livestock Ltd | Agriculture & fishing | 2010 |
| Wilson Technical Services Limited | Construction | 2005 |
| Windmill Country Park Limited | Hospitality | 2003 |
| Wold Ecology Limited | Other services | 2009 |
| Wold House Books Limited | Information & communication | 2025 |