| Tournees D'Homme Brun Ltd | Administrative & support | 2024 |
| Tovich & Co Accounting Ltd | Professional & scientific | 2021 |
| TOW Pro Bournemouth Limited | Transport & logistics | 2026 |
| Tower Court Bournemouth Limited | Households | 2000 |
| Tower Court Properties Limited | Households | 1993 |
| Tower Glass (Bournemouth) Limited | Manufacturing | 1973 |
| Tower House Hotel Limited | Real estate | 2004 |
| Tower Media and Events Ltd | Professional & scientific | 2021 |
| Town & Country (IT) Ltd | Information & communication | 2020 |
| Town & Country Property Auctions Hampshire Ltd | Real estate | 2023 |
| Town & Country Property Auctions South Ltd | Real estate | 2021 |
| Town & County Dorset Ltd | Construction | 2015 |
| Town & County Properties Ltd | Real estate | 2019 |
| Town and Coast Capital Ltd | Professional & scientific | 2019 |
| Town and Coast Homes Ltd | Real estate | 2022 |
| Town and Coast Limited | Real estate | 2015 |
| Town and Country Communications (Bournemouth) Limited | Information & communication | 2013 |
| Town and Country Communications Holding Group Limited | Financial services | 2017 |
| Town and Quay Solutions Ltd | Professional & scientific | 2017 |
| Town Home Lettings Ltd | Real estate | 2025 |
| Town Stay Ltd | Real estate | 2025 |
| Townhouse Products Ltd | Manufacturing | 2007 |
| Townsend Youth Partnership | Education | 2001 |
| Towntop Roofing Ltd | Construction | 2026 |
| Toy and Robin Ltd | Administrative & support | 2017 |
| Toyplantstore Ltd | Wholesale & retail | 2020 |
| Tozer Way Management Company Limited | Households | 2019 |
| Tozoni Ltd | Information & communication | 2022 |
| TP Care at Homes Ltd | Health & social care | 2024 |
| TQM Data Ltd | Information & communication | 2005 |
| Trace 6 Limited | Professional & scientific | 2024 |
| Tracey Court (Highcliffe) Limited | Households | 1998 |
| Tracey LAB Ltd | Professional & scientific | 2025 |
| Track Two Limited | Extraterritorial | 1988 |
| Trade Air (U.K.) Limited | Extraterritorial | 1985 |
| Trade Airline Services Limited | Extraterritorial | 1989 |
| Trade on Ltd | Information & communication | 2024 |
| Trade-Air Airline Support Limited | Wholesale & retail | 1980 |
| Trade-Air Corporate Aircraft Support Ltd. | Extraterritorial | 2011 |
| Trade-Air Engines and Apu's Limited | Extraterritorial | 2022 |
| Tradeair Limited | Extraterritorial | 2006 |
| Tradelinx Limited | Extraterritorial | 2008 |
| Trademade Carpentry Solusions Ltd | Construction | 2021 |
| Tradenote Limited | Construction | 2001 |
| Tradepayd Ltd | Administrative & support | 2026 |
| Trader Counter Software Limited | Extraterritorial | 2009 |
| Tradewind Travel Limited | Administrative & support | 2007 |
| Tradex Rings Ltd | Wholesale & retail | 2025 |
| Trail Creatives Ltd | Information & communication | 2019 |
| Trailblazers Coaching & Consulting Limited | Professional & scientific | 2005 |
| Train Elite Bournemouth Limited | Arts & recreation | 2020 |
| Train Elite Limited | Arts & recreation | 2015 |
| Training for Dogs Ltd | Other services | 2023 |
| Training Lounge Ltd | Education | 2019 |
| Training Matters (Dorset) Limited | Administrative & support | 2011 |
| Tran Investments Limited | Hospitality | 2007 |
| Tranquil Hotel Management Ltd | Hospitality | 2026 |
| Tranquillity Ventures LLP | | 2009 |
| Trans Garage Ltd | Other services | 2019 |
| Transcam Staffing Solution Limited | Transport & logistics | 2015 |
| Transform Your Training Ltd | Professional & scientific | 2024 |
| Transformer Controls Limited | Manufacturing | 2024 |
| Translator Supermarket Ltd | Professional & scientific | 2023 |
| Transmal Ltd | Transport & logistics | 2026 |
| Transport Technical Services Limited | Wholesale & retail | 2020 |
| Transportgo Ltd | Wholesale & retail | 2018 |
| TRANSPORTS4YOU Limited | Transport & logistics | 2015 |
| Trap Union Limited | Manufacturing | 2024 |
| Trattoria Contemporanea DI Marcio Ltd | Wholesale & retail | 2025 |
| Travantis Ltd | Professional & scientific | 2020 |
| Travel Squad Ltd | Wholesale & retail | 2015 |
| Trayton Adams Finance Limited | Other services | 2016 |
| TRC Scientific Limited | Manufacturing | 2014 |
| Treasure House Southbourne Ltd | Wholesale & retail | 2019 |
| Tree Hamlet (Management) Company Limited | Households | 1975 |
| Treeborough Developments Limited | Construction | 2003 |
| Treechain Property Investments Limited | Real estate | 1981 |
| Trees & Co Accountancy Ltd | Professional & scientific | 2026 |
| Trees Maintenance Company Limited(The) | Real estate | 1986 |
| Treffgarne Advisory Limited | Professional & scientific | 2026 |
| Trehane Technology Company Ltd | Information & communication | 2018 |
| Treken Holdings Ltd | Financial services | 2018 |
| Treken Information Management Limited | Information & communication | 2002 |
| Treken Properties Limited | Real estate | 2022 |
| Trekova Ltd | Administrative & support | 2025 |
| Trelawney (Dorset) Ltd | Professional & scientific | 2008 |
| Treloen Court Freehold Limited | Households | 2005 |
| Trevor Davis & Associates Ltd | Professional & scientific | 2019 |
| TRG Global Ltd | Professional & scientific | 2020 |
| Trgt Digital Ltd. | Professional & scientific | 2014 |
| TRI Designs Limited | Professional & scientific | 2015 |
| Tri-Supply Limited | Wholesale & retail | 2012 |
| Trident Associates UK Limited | Professional & scientific | 1993 |
| Trim Estates Limited | Real estate | 2017 |
| Trimaran Property Development Limited | Professional & scientific | 2005 |
| Trindles and Green Ltd | Information & communication | 2016 |
| Trinity (Bournemouth) Management Limited | Real estate | 1986 |
| Trinity and Paige Ltd | Real estate | 2023 |
| Trinity HR (Bournemouth) Ltd | Administrative & support | 2019 |
| Trinity Payments Limited | Information & communication | 2023 |