| Trantec Ltd | Manufacturing | 2023 |
| Travel Management Consortium Limited | Administrative & support | 2020 |
| Trela BSC Ltd | Hospitality | 2022 |
| Trela CRE Limited | Real estate | 2026 |
| Trela Investment Group Ltd | Real estate | 2024 |
| Trela Limited | Wholesale & retail | 2009 |
| Trend-Monitor Ltd | Professional & scientific | 2016 |
| Trent Media Limited | Manufacturing | 2015 |
| Trevanson Consultancy Limited | Professional & scientific | 2018 |
| Tri-Fax Ltd | Wholesale & retail | 2023 |
| Tri-Furb Limited | Construction | 2020 |
| Triangle Select Properties Limited | Real estate | 2002 |
| Tribe OIL UK Ltd | Wholesale & retail | 2018 |
| Trident Lifting Services Ltd | Construction | 2024 |
| Trimmingham Investments Ltd | Real estate | 2022 |
| Trinity Central Services Limited | Education | 2026 |
| Trinity Motor Sales Limited | Wholesale & retail | 2020 |
| Trinity Multi Academy Trust | Education | 2009 |
| Trinity Royd (Halifax) Management Company Limited | Households | 2019 |
| Trip UP Limited | Other services | 2025 |
| Triple D Trades Ltd | Administrative & support | 2026 |
| Triple Ends Ltd | Construction | 2020 |
| Triple S Plus Limited | Real estate | 2004 |
| Triplelook Limited | Professional & scientific | 1990 |
| Troper Report Ltd | Health & social care | 2024 |
| Trovegold Limited | Real estate | 1981 |
| TRU Property Investments Limited | Real estate | 1974 |
| TRU Restoration Ltd | Water & waste | 2024 |
| True Finish Plastering Ltd | Construction | 2026 |
| True Hair True Beauty Limited | Other services | 2016 |
| True North Accountancy Ltd | Professional & scientific | 2015 |
| Trunorth Procurement Consultancy Ltd | Professional & scientific | 2025 |
| TS Holdings Worldwide UK Limited | Manufacturing | 2025 |
| TS Supplies Limited | Wholesale & retail | 2026 |
| TSM Electrical Halifax Ltd | Professional & scientific | 2024 |
| TSR Independant Limited | Other services | 2024 |
| TTE Takeaway Ltd | Hospitality | 2022 |
| Tubular Products (UK) Limited | Extraterritorial | 1999 |
| Tuindo Limited | Professional & scientific | 2017 |
| Tunstall Properties Limited | Construction | 2006 |
| Turbine OIL Services Ltd | Wholesale & retail | 2010 |
| Turing Development Ltd | Information & communication | 2024 |
| Turkish Barbers Halifax Limited | Other services | 2021 |
| Turner & SON (Yorkshire) Limited | Real estate | 2025 |
| Turner Adams Joinery Limited | Construction | 2015 |
| Turner House Ltd | Professional & scientific | 2026 |
| Turner Technical Solutions Ltd | Information & communication | 2020 |
| Turquoise Arts Community Interest Company | Arts & recreation | 2023 |
| TUS Quality Clothing Ltd | Wholesale & retail | 2016 |
| TUS School Wear Limited | Wholesale & retail | 2013 |
| Tutto MIO Ltd | Real estate | 2011 |
| TV Aerial MAN & SON Ltd | Other services | 2025 |
| TV North Limited | Information & communication | 2012 |
| Tven UK Limited | Wholesale & retail | 2026 |
| Twbb Joinery Services Ltd | Construction | 2021 |
| TWELVE18 Limited | Information & communication | 2019 |
| TWENTY20 Interiors Ltd | Professional & scientific | 2020 |
| Twin Valley Construction Ltd | Construction | 2020 |
| Twisted Festival Ltd | Arts & recreation | 2022 |
| Twisted Tea Limited | Wholesale & retail | 2025 |
| Two Kaye Limited | Real estate | 2002 |
| Two Thomas's Ltd | Real estate | 2019 |
| Txap Ltd | Other services | 2026 |
| TY Brennand Limited | Arts & recreation | 2021 |
| Typefax Limited | | 1988 |
| Typic Ltd | Wholesale & retail | 2013 |
| Tyre Collections & Disposals Ltd | Water & waste | 2022 |
| U Roof Limited | Construction | 2007 |
| U.K Gabion & Retaining Systems Ltd | Construction | 2016 |
| Uarecruitment Ltd | Public administration | 2026 |
| UBH Properties Limited | Real estate | 2021 |
| UC HX1 Ltd | Manufacturing | 2026 |
| UC HX2 Ltd | Manufacturing | 2026 |
| UC Specialist Accountants Ltd | Professional & scientific | 2023 |
| UC Van Ltd | Hospitality | 2026 |
| Uccelli Global Ltd | Wholesale & retail | 2019 |
| Uffizzi Interiors Limited | Construction | 2004 |
| Ufix Building Supplies Ltd | Wholesale & retail | 2024 |
| UI Legal Limited | Professional & scientific | 2023 |
| UK Beer Dispense Ltd | Administrative & support | 2024 |
| UK Claims Consulting Ltd | Professional & scientific | 2018 |
| UK Environmental Controls Ltd | Administrative & support | 2018 |
| UK Frieght Masters Ltd | Transport & logistics | 2026 |
| UK Hand Car Wash Ltd | Administrative & support | 2025 |
| UK IT (Holdings) Limited | Information & communication | 2023 |
| UK Law Book Sellers Ltd | Wholesale & retail | 2020 |
| UK Sandbags & Aggregates Limited | Wholesale & retail | 2014 |
| UK Sandbags Limited | Professional & scientific | 2024 |
| UK Skin Solutions Limited | Health & social care | 2015 |
| UK Sparkle Cleaning Services Limited | Administrative & support | 2020 |
| UK Store Collection Ltd | Wholesale & retail | 2026 |
| UK Trade Centre Limited | Wholesale & retail | 2013 |
| UK Tyre Solutions Mobile Limited | Wholesale & retail | 2023 |
| UK Utility Services Limited | Extraterritorial | 2023 |
| Ukaye Enterprises Ltd | Wholesale & retail | 2025 |
| Ukgrs Ltd | Construction | 2026 |
| Ukmmhrs Limited | Wholesale & retail | 2024 |
| Ukrainians in Calderdale Ltd | Education | 2022 |
| Ulearn Education Limited | Education | 2014 |
| Ulldale Pratt Ltd | Wholesale & retail | 2025 |