| Tees Valley Nolettinggo Ltd | Real estate | 2021 |
| THE Arbd Network C.I.C. | Health & social care | 2021 |
| THE Arches (Skinner Street) Limited | Hospitality | 2021 |
| THE Arches Whitby Limited | Hospitality | 2010 |
| THE Battered Vegan Ltd | Hospitality | 2021 |
| THE Bay Broadband Co-Operative Ltd. | Other services | 2004 |
| THE Bay Company Group Ltd | Wholesale & retail | 2023 |
| THE Beck Veterinary Practice Limited | Professional & scientific | 2006 |
| THE Bunheads Limited | Wholesale & retail | 2025 |
| THE Chapter of the Order of the Holy Paraclete Limited | Other services | 1976 |
| THE Dark Place Limited | Agriculture & fishing | 2010 |
| THE Discovery Townhouse Ltd | Hospitality | 2015 |
| THE Ellerby Limited | Hospitality | 2014 |
| THE Engraving Company Limited | Manufacturing | 2002 |
| THE ESK Vaults Limited | Hospitality | 2022 |
| THE Eskdale Castleton Ltd | Hospitality | 2019 |
| THE Fishing Bull Ltd | Agriculture & fishing | 2018 |
| THE Fleece (Whitby) Limited | Hospitality | 2012 |
| THE Geall Gallery Limited | Wholesale & retail | 2011 |
| THE Green Dragon ALE House Ltd | Administrative & support | 2016 |
| THE Little Angel Accommodation Ltd | Real estate | 2024 |
| THE Magpie's Kitchen Ltd | Wholesale & retail | 2010 |
| THE Old School House Residents Association Limited | Households | 1997 |
| THE POT and Pineapple Ltd | Wholesale & retail | 2023 |
| THE Rustic Baking Company Limited | Manufacturing | 2018 |
| THE Seafood Social C.I.C. | Hospitality | 2017 |
| THE Solar Compass CIC | Arts & recreation | 2018 |
| THE Station Inn Limited | Hospitality | 2006 |
| THE TAN Lounge Whitby Limited | Other services | 2024 |
| THE Truffled HOG Danby Limited | Hospitality | 2025 |
| THE Victoria Hotel RHB Limited | Hospitality | 2003 |
| THE Whitby Candle Company Limited | Wholesale & retail | 2024 |
| THE Whitby Fish and Chips Company Limited | Extraterritorial | 2014 |
| THE Whitby Game Ltd | Administrative & support | 2025 |
| THE Whitby Linen Company Ltd | Other services | 2021 |
| THE Willow Branch (Whitby) Ltd | Hospitality | 2016 |
| THE Wooden Horse Nursery Ltd | Health & social care | 2014 |
| THE Yorkshire Animation Company Limited | Professional & scientific | 2018 |
| THE Yorkshire Deli Limited | Wholesale & retail | 2024 |
| Themfproject Ltd | Arts & recreation | 2025 |
| Thompson Building Contractors Limited | Construction | 2009 |
| Thompson Holiday Homes Ltd | Hospitality | 2025 |
| Tidemoor Properties Ltd | Hospitality | 2025 |
| Tides Beach Shop Limited | Wholesale & retail | 2015 |
| Tides Beach Shop Runswick Limited | Wholesale & retail | 2022 |
| Tipex Ltd | Construction | 2020 |
| Tipsea Wines Ltd | Wholesale & retail | 2023 |
| TJG Engineering Services Ltd | Professional & scientific | 2022 |
| TLC Home Improvements Ltd | Construction | 2022 |
| TMB Groundworks Limited | Construction | 2025 |
| Tony Barnes Electrical Contractor Limited | Construction | 2016 |
| Tony's Ices Ltd | Hospitality | 2005 |
| Totallynaturalskincare Limited | Wholesale & retail | 2013 |
| Towbar Express Limited | Wholesale & retail | 2006 |
| Town & Country Care (Whitby) Ltd | Health & social care | 2011 |
| Town and Country Fires Limited | Manufacturing | 2008 |
| Transformations Interior Designs Limited | Households | 2006 |
| Treasury Group Limited | Hospitality | 2024 |
| Trebor Group Ltd | Real estate | 2023 |
| Trillo Bros Limited | Hospitality | 2023 |
| Trillos of Whitby Ltd | Manufacturing | 2003 |
| Trophy Motorcycles and Parts Limited | Wholesale & retail | 2025 |
| Truenorth Construction Group Ltd | Construction | 2025 |
| Truly Scrumptious (Whitby) Limited | Hospitality | 2015 |
| Tuby Leisure Ltd | Arts & recreation | 2016 |
| TUM TUM Tree Limited | Information & communication | 2012 |
| Turvey's Tattoos Limited | Other services | 2003 |
| TWA CM Ltd | Professional & scientific | 2025 |
| Twelve Windsor Terrace (Whitby) Limited | Households | 1991 |
| Two the Penny Limited | Professional & scientific | 2002 |
| U.T. Kyber Limited | Financial services | 2013 |
| Ugthorpe Caravan Park Limited | Hospitality | 2003 |
| UK Direct Developments Ltd | Real estate | 2017 |
| UK Laundry Group Ltd | Administrative & support | 2022 |
| Ukme Limited | Wholesale & retail | 2016 |
| Umberella Systems Limited | Information & communication | 2010 |
| Underground Parts Limited | Wholesale & retail | 2012 |
| Union Mill (Whitby) Limited | Construction | 2007 |
| Union Mill Parking Limited | Real estate | 2015 |
| United Education Holdco Limited | Financial services | 2021 |
| United Sports Partnership Limited | Arts & recreation | 2019 |
| Universal Garage (Whitby) Limited | Wholesale & retail | 1954 |
| Valkry Solutions Limited | Public administration | 2025 |
| Valley View Farm Joinery & Groundworks Ltd | Construction | 2022 |
| Vassalli Limited | Manufacturing | 2010 |
| Vaughan Collective Ltd | Real estate | 2025 |
| Ventus Bay Ltd | Construction | 2024 |
| Venus Offshore Ltd | Mining & quarrying | 2023 |
| Vexeltrade Ltd | Wholesale & retail | 2026 |
| Victoria Farm Garden Centre Ltd | Wholesale & retail | 2003 |
| View of Beauty Limited | Transport & logistics | 2021 |
| Violet Lettings Ltd | Real estate | 2021 |
| W Fletcher Limited | Construction | 2004 |
| W. U. Butterfield (Farming) Limited | Agriculture & fishing | 1963 |
| W.E. Wilson Ltd | Wholesale & retail | 2020 |
| W.T.C. 360 Limited | Financial services | 2014 |
| Wagtail Civil Engineering Limited | Construction | 2019 |
| Walter Boyes (Whitby) Limited | Construction | 1961 |
| Waring Building & Roofing Ltd | Construction | 2019 |
| Watergate Haulage Limited | Transport & logistics | 2012 |