| TIP Centric Ltd | Information & communication | 2024 |
| Tipi Bar Services Ltd | Hospitality | 2022 |
| Tipi Holdings Ltd | Financial services | 2023 |
| Tipple & Underwood Limited | Real estate | 2014 |
| Tipsey Ltd | Arts & recreation | 2026 |
| Titanium Platform Limited | Information & communication | 2021 |
| TK Projects Limited | Extraterritorial | 2020 |
| TMK Street Food Limited | Hospitality | 2025 |
| TML Media Group Limited | Real estate | 2024 |
| Together 365 Ltd | Real estate | 2024 |
| TOM Arundel Ltd | Manufacturing | 1998 |
| TOM Colman Tiling Limited | Construction | 2014 |
| TOM White (Plumbing & Heating) Limited | Construction | 2011 |
| Tomkus LP | | 2020 |
| Tonic's Events Bars Ltd | Hospitality | 2019 |
| Tonics Events Bars Yorkshire Ltd | Hospitality | 2022 |
| Tonis Pizzas Ltd | Hospitality | 2022 |
| Tonnau Y MÔR Limited | Hospitality | 2024 |
| Tony Francis Builder Ltd | Construction | 2012 |
| Tony Peers Limited | Arts & recreation | 2012 |
| Toridion Ltd | Information & communication | 2025 |
| Total K9 Limited | Professional & scientific | 2015 |
| Total Window Cleaning Ltd | Other services | 2019 |
| TOTAL24 Ltd | Professional & scientific | 2022 |
| Tower Developments (Scarborough) Ltd | Real estate | 2022 |
| Tower Estates (Scarborough) Limited | Real estate | 2002 |
| Tower Properties (Scarborough) Limited | Real estate | 2018 |
| Townsend Shellfish Ltd | Agriculture & fishing | 2022 |
| Tracetech (UK) Limited | Construction | 2006 |
| Tracket Ltd | Information & communication | 2022 |
| Trade KM Ltd | Wholesale & retail | 2024 |
| Trade Suites Ltd | Professional & scientific | 2008 |
| Trading British Group Limited | Wholesale & retail | 2021 |
| Traditional Limited | Construction | 2002 |
| Trafalgar House Management Limited | Real estate | 2010 |
| Trafalgar Square (Scarborough) Limited | Real estate | 2002 |
| Train Together Health & Fitness Ltd | Other services | 2025 |
| Trainers House Enterprises Limited | Agriculture & fishing | 1997 |
| Transatlantic Studio Ltd | Arts & recreation | 2025 |
| Transylvanian Grill Ltd | Hospitality | 2025 |
| Trending Trader Ltd | Wholesale & retail | 2022 |
| Trenhams Wheels Ltd | Wholesale & retail | 2018 |
| Trevor Wharton Limited | Wholesale & retail | 1996 |
| Tricolos Limited | Hospitality | 2021 |
| Triffitt Nurseries Limited | Agriculture & fishing | 2003 |
| Trinity Church Court Limited | Real estate | 2003 |
| Trousdale EAR Care Limited | Health & social care | 2023 |
| Trrm Family Investment Company Limited | Real estate | 2023 |
| True Build York Ltd | Construction | 2024 |
| True Grounds York Ltd | Construction | 2025 |
| Trust Build Ltd | Construction | 2012 |
| Trust Plumbing (Scarborough) Limited | Construction | 2014 |
| Trust the Crust Ltd | Hospitality | 2026 |
| Trvrmc Limited | Wholesale & retail | 2026 |
| TS Engineering Limited | Manufacturing | 2005 |
| TSM Studio Ltd | Professional & scientific | 2024 |
| TSP Catering Ltd | Hospitality | 2024 |
| Tudor House Holidays Ltd | Hospitality | 2022 |
| Turbine Field Services Ltd | Manufacturing | 2024 |
| Turn UP the Colour C.I.C. | Health & social care | 2024 |
| Turner Properties (Scarborough) Ltd | Real estate | 2024 |
| Tuscany TOO Limited | Hospitality | 2011 |
| Tutti Frutti Properties Limited | Real estate | 2017 |
| Twenty TEN Properties Limited | Financial services | 1982 |
| Twenty-Twenty Entertainment Ltd | Arts & recreation | 2021 |
| Two Green Leaves Limited | Manufacturing | 2012 |
| TWR Partners Ltd | Administrative & support | 2026 |
| Twrc Limited | Transport & logistics | 1992 |
| TYD Training Ltd | Education | 2026 |
| UAD Limited | Professional & scientific | 2009 |
| Uflexx Ltd | Health & social care | 2017 |
| UK Foundation for Dance | Arts & recreation | 1994 |
| UK Gamers Ltd | Information & communication | 2025 |
| UK Plant Training Limited | Other services | 2018 |
| UK Power Systems Limited | Manufacturing | 2007 |
| UK Prime Student LP | | 2003 |
| UK Pro Fitness Ltd | Arts & recreation | 2018 |
| UK Sprinter Ltd | Wholesale & retail | 2024 |
| Ulliott Plant Ltd | Administrative & support | 2026 |
| Ultra DRY Touch Ltd | Administrative & support | 2026 |
| ULU Kebab 2022 Ltd | Hospitality | 2022 |
| Umut 38 Limited | Hospitality | 2024 |
| Unify Holdings Ltd | Professional & scientific | 2021 |
| Union Mill Whitby Management Company Limited | Households | 2008 |
| Unison Limited | Manufacturing | 1973 |
| Unison Technical Services Limited | Professional & scientific | 2010 |
| United Kingdom Javelin Carnival Limited | Arts & recreation | 2018 |
| United Window Cleaning Services Ltd | Other services | 2020 |
| Unloved Garage Limited | Wholesale & retail | 2025 |
| Untouchable IC Limited | Professional & scientific | 2025 |
| UP North Brickwork Ltd | Construction | 2024 |
| UP North Holdings Ltd | Financial services | 2024 |
| UP North Properties Investments Ltd | Real estate | 2024 |
| UPM Raflatac (UK) Limited | Manufacturing | 2017 |
| Urban Nutrition (Northern) Ltd | Extraterritorial | 2017 |
| Urstoff Ltd | Wholesale & retail | 2018 |
| Utility Insight Solutions Ltd | Professional & scientific | 2024 |
| Vacation Ltd | Hospitality | 2023 |
| Valencia Felix Ltd | Hospitality | 2018 |
| Valiant Miniatures Limited | Manufacturing | 2006 |