| Thrive Talent Development Ltd | Professional & scientific | 2021 |
| Tickton Grange Limited | Hospitality | 1980 |
| Tickton Hall Limited | Arts & recreation | 2009 |
| Tier 2 Limited | Administrative & support | 2007 |
| Tiffany Leisure Ltd | Hospitality | 2023 |
| Tile Shop Online Limited | Extraterritorial | 2013 |
| TIM Dixon Plumbing and Heating Limited | Construction | 2003 |
| Timberlite Ltd | Construction | 2015 |
| Time & Motion Clock Repairs Limited | Wholesale & retail | 2018 |
| Time for YOU (Hull) Ltd | Administrative & support | 2023 |
| Tips Hull Ltd | Hospitality | 2018 |
| TJ Commercial Properties Ltd | Real estate | 2024 |
| TJC Holdings Limited | Construction | 2016 |
| TKM Services (UK) Limited | Health & social care | 2015 |
| Tkstairs Holdings Limited | Information & communication | 2024 |
| TL Social Work Ltd | Health & social care | 2024 |
| Tl-Clifford Limited | Financial services | 2016 |
| TLD Property Ltd | Real estate | 2026 |
| TMM Direct Ltd. | Wholesale & retail | 2011 |
| Tolle Ltd | Wholesale & retail | 2017 |
| TOM Hardwick Ltd | Wholesale & retail | 2025 |
| Tomlin Accountants Limited | Professional & scientific | 2006 |
| Tomlin Brothers Commercial Limited | Real estate | 2018 |
| Tomlin Brothers Developments Limited | Real estate | 2018 |
| Tomlin Brothers Letting Limited | Real estate | 2018 |
| Tony Blank Properties Limited | Real estate | 2013 |
| Tony’S Lifting Ltd | Mining & quarrying | 2026 |
| Topcars Holdings Limited | Professional & scientific | 2025 |
| Topcars Limited | Administrative & support | 2001 |
| Torba Hand Car Wash Ltd | Administrative & support | 2024 |
| Torchbearer Group Limited | Professional & scientific | 2022 |
| Torchbearer Holdings Limited | Financial services | 2023 |
| Total Build Construction Ltd | Construction | 2023 |
| Total Marketing Partners Limited | Professional & scientific | 2026 |
| Total Workwear Limited | Wholesale & retail | 2023 |
| Tower Contractors Ltd | Construction | 2022 |
| Towse Property Ltd | Real estate | 2024 |
| Towse Watterson Limited | Hospitality | 2025 |
| TPA Security Ltd | Administrative & support | 2022 |
| Trade Skills Training Ltd | Education | 2025 |
| Traditionally Nice Pubs Limited | Hospitality | 2010 |
| TRAIN4ACADEMY Limited | Education | 2002 |
| TRAIN4FOOD Limited | Extraterritorial | 2012 |
| Tranquility Funerals Limited | Other services | 2007 |
| Transforming Psychological Therapy Ltd | Health & social care | 2024 |
| Transit-Tech Engine Specialists Ltd | Wholesale & retail | 2026 |
| Transit-Tech Ltd | Wholesale & retail | 2019 |
| Traynor Homes Ltd | Construction | 2018 |
| Tremolo Property Holdings Limited | Real estate | 2018 |
| Trevtay Limited | Professional & scientific | 2015 |
| Triad Garages Limited | Wholesale & retail | 2002 |
| Trinity Court Hessle RTM Company Limited | Households | 2012 |
| Trinity Gate (Finningley) Management Limited | Households | 2012 |
| Trinity Quarter Hull Ltd | Hospitality | 2026 |
| Trinity Wharf Ltd | Hospitality | 2026 |
| Triquetra Marine Limited | Professional & scientific | 2008 |
| Triton Hire Ltd | Administrative & support | 2025 |
| Trophy Pet and Equestrian Supplies Limited | Wholesale & retail | 2014 |
| Trulay Drives (Yorkshire) Ltd | Construction | 2025 |
| Truscott Construction Ltd | Construction | 2026 |
| TTC Consulting Ltd | Information & communication | 2026 |
| TTY Interchange Ltd | Information & communication | 2026 |
| Tudor Lodge (Hessle) Management Limited | Households | 2004 |
| Tulip Group Ltd | Financial services | 2022 |
| Tulip Italia Ltd | Real estate | 2021 |
| Tulip Maintenance Ltd | Construction | 2021 |
| Tulip Student Living Ltd | Households | 2022 |
| Turf to Tile Limited | Construction | 2016 |
| Turnkey Hvac Services Limited | Professional & scientific | 2022 |
| Turnstone Financial Management Limited | Professional & scientific | 1998 |
| Turpins Coffee House Limited | Hospitality | 2025 |
| TW Electrical East Yorkshire Ltd | Construction | 2024 |
| TW Housing Ltd | Real estate | 2025 |
| TWENTY80 Limited | Information & communication | 2023 |
| Two Cats Limited | Professional & scientific | 2012 |
| Two Explore Ltd | Administrative & support | 2024 |
| Two Gingers Coffee Limited | Hospitality | 2017 |
| Twofold Holdings Ltd | Financial services | 2026 |
| TYB Barbershop Ltd | Other services | 2026 |
| UK Event Associates Ltd | Administrative & support | 2014 |
| UK Gold Coins Ltd | Financial services | 2020 |
| UK Industrial Development Ltd | Administrative & support | 2024 |
| UK Projects Ltd | Construction | 2019 |
| UK Risk Management Holdings Ltd | Financial services | 2024 |
| Ultra Lift Services Ltd | Professional & scientific | 2021 |
| Unanimity Group Limited | Financial services | 2025 |
| Union Aggregates & Grab Hire Limited | Water & waste | 2020 |
| Unique Paving and Driveways Ltd | Construction | 2021 |
| Unite Learning Limited | Education | 2023 |
| Unknown Native Ltd | Information & communication | 2019 |
| UP Front Recruiting Limited | Administrative & support | 2025 |
| Upholstery Design Limited | Wholesale & retail | 2002 |
| Urbn Electrical Ltd | Construction | 2022 |
| Urbn UK Holdings Ltd | Financial services | 2022 |
| Urembo Beauty Brows Limited | Other services | 2024 |
| Useelocal Limited | Information & communication | 2018 |
| Valk Ltd | Real estate | 2025 |
| Vantage EHS Ltd | Professional & scientific | 2025 |
| Vantage Relocation Limited | Extraterritorial | 2011 |
| Velvet Leisure (Hull) Limited | Real estate | 2009 |