| Tiger Mountain Limited | Wholesale & retail | 2018 |
| Tintro Limited | Construction | 2005 |
| Tip-Top Film Productions Limited | Information & communication | 2022 |
| Tirril Tech Ltd | Information & communication | 2026 |
| Tisl Limited | Arts & recreation | 2026 |
| TJ & PCD Ltd | Health & social care | 2025 |
| TLA Sports Group Limited | Information & communication | 2022 |
| TMF Inns Limited | Hospitality | 2023 |
| TN Link Limited | Professional & scientific | 2020 |
| TNM Property Limited | Real estate | 2017 |
| Toasters Trading Limited | Hospitality | 2022 |
| Tony Baker Developments Ltd | Manufacturing | 2003 |
| Top Cuts Barber Penrith Ltd | Other services | 2026 |
| Topup Service Ltd | Financial services | 2021 |
| TOR Place (Ambleside) Limited | Real estate | 2026 |
| Torre Services Ltd | Professional & scientific | 2020 |
| Total Train Limited | Public administration | 2019 |
| Totty Lowther Designs Ltd | Professional & scientific | 2022 |
| Town END Croft (Clifton) Management Company Limited | Real estate | 2003 |
| Townend Equestrian Centre Limited | Agriculture & fishing | 2017 |
| Townend Ltd | Real estate | 2012 |
| Townley Apartments Limited | Real estate | 2006 |
| TPH Cumbria Limited | Real estate | 2025 |
| Trade Copiers Limited | Wholesale & retail | 2002 |
| Trading TCG Limited | Wholesale & retail | 2026 |
| Tradwise Plus Limited | Professional & scientific | 2002 |
| Traybakes Limited | Manufacturing | 2008 |
| Tredaxa Limited | Health & social care | 2024 |
| Treloyhan Leisure Limited | Hospitality | 2024 |
| Trendthorpe Limited | Arts & recreation | 1987 |
| Trenholme Farm Limited | Agriculture & fishing | 2023 |
| Trevaskis Coaching Ltd | Education | 2021 |
| Troutbeck Caravan Park Ltd | Hospitality | 2015 |
| Trusail Limited | Information & communication | 2016 |
| Tubado Ltd | Information & communication | 2014 |
| Tuftcraft Limited | Wholesale & retail | 2025 |
| Turnbull Farming | Agriculture & fishing | 2008 |
| Turvey & Co Ltd | Professional & scientific | 2016 |
| Tuware Ltd. | Information & communication | 2014 |
| Tweddell & Slater Holdings Limited | Financial services | 2020 |
| Tweddell & Slater Limited | Professional & scientific | 2000 |
| Tweddell & Slater North East Limited | Professional & scientific | 2019 |
| Twiggy PEA Sticks Limited | Professional & scientific | 2006 |
| Two Lions Hotel Limited | Hospitality | 2022 |
| TWT Projects Limited | Professional & scientific | 2009 |
| Tynedale Guest House Ltd | Hospitality | 2024 |
| Tynefield Park Cricket Limited | Arts & recreation | 2020 |
| Tyrli Transport Limited | Transport & logistics | 2025 |
| Uber Lighting Ltd | Wholesale & retail | 2018 |
| Ullswater Catchment Management CIC | Administrative & support | 2018 |
| Ullswater Countryside Management Ltd | Construction | 2023 |
| Ullswater Hotel Limited | Hospitality | 1982 |
| Ullswater Limited | Agriculture & fishing | 2025 |
| Ullswater Paddleboarding Limited | Arts & recreation | 2021 |
| Ullswater Property Maintenance Ltd | Administrative & support | 2026 |
| Ullswater Road Garage Limited | Wholesale & retail | 2012 |
| Ullswater View Limited | Hospitality | 2006 |
| Ullswater Wake and Surf Limited | Arts & recreation | 2020 |
| Uncommon Alchemy Ltd | Manufacturing | 2020 |
| Underfell Consulting Limited | Professional & scientific | 2025 |
| Unit 7 Safety Ltd | Arts & recreation | 2018 |
| Upfront Arts Limited | Arts & recreation | 2002 |
| Upkeep Maintenance Limited | Construction | 2025 |
| Urban Bunkhouse Limited | Construction | 2025 |
| UYC Services Limited | Arts & recreation | 2024 |
| V & M Trans Ltd | Transport & logistics | 2018 |
| V a Gargett Limited | Hospitality | 2021 |
| Vaillant & Co. Ltd | Construction | 2023 |
| Valley Financial Limited | Professional & scientific | 2019 |
| Vando Services Ltd | Real estate | 2025 |
| Vanessa Mcviety Limited | Other services | 2005 |
| VB Online Limited | Wholesale & retail | 2020 |
| Vench Creative Ltd | Wholesale & retail | 2019 |
| Venutius Ltd | Professional & scientific | 2022 |
| Verdant Engineering Ltd | Professional & scientific | 2007 |
| Vertic Limited | Construction | 2013 |
| Vertigo Group Limited | Extraterritorial | 2003 |
| VET Vision Limited | Extraterritorial | 2015 |
| Vigr Ltd | Arts & recreation | 2017 |
| Viking Castles Limited | Real estate | 2016 |
| Viking Crowns Limited | Health & social care | 2016 |
| Village Breaks Limited | Professional & scientific | 2016 |
| Viresource Limited | Information & communication | 2007 |
| Vizelle Limited | Professional & scientific | 2023 |
| Voluntary Action Cumbria | Other services | 2000 |
| W D a Contractors Ltd | Construction | 2014 |
| W E Shand Limited | Health & social care | 2020 |
| W R Wilson Limited | Agriculture & fishing | 2008 |
| W.B. Anderson Investments Limited | Real estate | 2001 |
| W.K. Stalker & SON Limited | Transport & logistics | 2003 |
| Wagging Trails Ltd | Other services | 2023 |
| Waitings Holdings Limited | Financial services | 2025 |
| Waitings Limited | Construction | 2002 |
| Waitings Marineworks Limited | Construction | 2025 |
| Waitings Properties Limited | Construction | 2025 |
| Wakefield Gardens (Lazonby) Limited | Construction | 2021 |
| Walker Ellis Associates Limited | Professional & scientific | 2006 |
| Walker OIL Heating Services Ltd | Other services | 2010 |
| Wallace Sheetmetal & Fabrication Limited | Manufacturing | 2002 |
| Wallbank Farms Limited | Agriculture & fishing | 2007 |