| Timetag Ltd | Information & communication | 2023 |
| Timey's, Watch and Jewellery Repairs Ltd | Other services | 2023 |
| Timfit Ltd | Manufacturing | 2023 |
| Timothy John Media Ltd | Professional & scientific | 2019 |
| Tinki Winki Motorsport Ltd | Wholesale & retail | 2019 |
| Tiny Explorers Pre-School- Poole Ltd | Education | 2017 |
| Tiny Sports School Ltd | Education | 2021 |
| Tiny Tots Valet Ltd | Administrative & support | 2024 |
| Tinybyte Limited | Wholesale & retail | 2025 |
| TIP Top Tours Ltd | Administrative & support | 2025 |
| Tiptoe Consulting Ltd | Professional & scientific | 2023 |
| Tiptop Design Ltd | Construction | 2022 |
| Tiri BAZ Limited | Real estate | 2025 |
| TIRZ20 Ltd | Wholesale & retail | 2025 |
| Tish Lyon Holdings Limited | Wholesale & retail | 2021 |
| Tish Lyon Limited | Wholesale & retail | 2018 |
| Tish Lyon Studios Limited | Wholesale & retail | 2024 |
| Titan Drylining Limited | Construction | 2008 |
| Titan Innovations Ltd | Information & communication | 2025 |
| Tivra Solutions Limited | Professional & scientific | 2025 |
| TJ Pro Dog Co Ltd | Wholesale & retail | 2023 |
| TJ Southern Roofing Ltd | Construction | 2025 |
| TJG (Services) Limited | Hospitality | 2015 |
| TJO Investments Ltd | Real estate | 2019 |
| TK Barbar Shop Ltd | Other services | 2020 |
| TK Digital Ltd | Information & communication | 2014 |
| TK WIN Ltd | Professional & scientific | 2018 |
| TL Capital Limited | Financial services | 2018 |
| TLC (Dorset) Properties Ltd | Real estate | 2019 |
| TLC World Ltd | Wholesale & retail | 2016 |
| Tlnt Group Ltd | Professional & scientific | 2022 |
| TLR Auto Consultants Limited | Wholesale & retail | 2012 |
| TM Brands Limited | Wholesale & retail | 2010 |
| Tmarine Ltd | Manufacturing | 2022 |
| TMB Global Trade Ltd | Wholesale & retail | 2025 |
| Tmgi Consulting Limited | Professional & scientific | 2010 |
| TMI Lighting Limited | Wholesale & retail | 2015 |
| TMT Property Ltd | Real estate | 2020 |
| TN Marine Ltd | Manufacturing | 2021 |
| TN Roofing Solution Limited | Construction | 2017 |
| TNB Accountants Ltd | Professional & scientific | 2025 |
| Tnef Ltd | Information & communication | 2026 |
| TO Drag & to Hold Ltd | Education | 2024 |
| Tobi AI Ltd | Information & communication | 2018 |
| Toby Engineering Ltd | Professional & scientific | 2016 |
| Toby Irons Ltd | Administrative & support | 2022 |
| Toby Management Bournemouth Ltd | Households | 2015 |
| Tockify Ltd | Information & communication | 2011 |
| TOF28 Media Ltd | Arts & recreation | 2021 |
| Together in Balance CIC | Education | 2025 |
| Toghrul Global Limited | Wholesale & retail | 2025 |
| Tokbuild Ltd | Construction | 2024 |
| Toklon Limited | Real estate | 2004 |
| Tolob Limited | Financial services | 2025 |
| TOM Archer Plumbing Services Limited | Construction | 2016 |
| TOM Bailey Contracting Ltd | Information & communication | 2020 |
| TOM Dick & Harry's (Poole) Limited | Other services | 2012 |
| TOM Frowde Architects Ltd | Professional & scientific | 2014 |
| TOM Green Surveying and Architectural Services Limited | Professional & scientific | 2022 |
| TOM Reynolds Architecture Limited | Professional & scientific | 2000 |
| Tom-Trans Tomasik Ltd | Transport & logistics | 2018 |
| Tomahawk Carpentry Ltd | Construction | 2016 |
| Tomes Reliance Limited | Administrative & support | 2017 |
| Tominoki Ltd | Information & communication | 2023 |
| Tomlin Property Group Ltd | Financial services | 2024 |
| Tomlinetrans Ltd. | Transport & logistics | 2021 |
| Tommy Kwok Digital Limited | Wholesale & retail | 2023 |
| Tomographic Media Ltd | Information & communication | 2022 |
| Tomoken Limited | Information & communication | 2017 |
| Tomoken Property Ltd | Real estate | 2019 |
| Tomorrows Travel Group Limited | Financial services | 2025 |
| Tomorrows Travel Limited | Transport & logistics | 2023 |
| Tone Fitness Ltd | Arts & recreation | 2014 |
| Tonn NUA Ltd | Wholesale & retail | 2025 |
| Tonnessen Limited | Professional & scientific | 2012 |
| Tony Davies Plastering Ltd | Administrative & support | 2017 |
| Tony Newman Management & Letting Limited | Real estate | 2009 |
| Tony Newman Property Services Limited | Real estate | 2008 |
| Tony Spotswood Links Consultancy Limited | Professional & scientific | 2018 |
| TOO Sweet Investments Limited | Real estate | 2018 |
| Toorak Management Limited | Households | 2004 |
| Toothless Media Ltd | Information & communication | 2025 |
| Top Clear Ltd | Water & waste | 2021 |
| Top Down Developments Ltd | Real estate | 2024 |
| Top Flight Distribution Limited | Wholesale & retail | 2025 |
| Top HAT Sourcing Ltd | Real estate | 2019 |
| Top Howayson Ltd | Information & communication | 2025 |
| Top Spec Flooring Ltd | Extraterritorial | 2023 |
| Top Tier Drylining and Construction Limited | Construction | 2026 |
| TOP2SELLERS Ltd | Wholesale & retail | 2019 |
| Topaz Care Living Ltd | Health & social care | 2024 |
| Topaz Real Estate Ltd | Real estate | 2019 |
| Topazi Ltd | Wholesale & retail | 2024 |
| Topclass Business & Manufacturing Consultancy Limited | Professional & scientific | 2004 |
| Topgun Consultancy Ltd | Health & social care | 2016 |
| Topsail Insurance Limited | Financial services | 1996 |
| Torch Star Limited | Information & communication | 2025 |
| Toredo Homes Ltd | Real estate | 2024 |
| Torvain Park Management Company Limited | Households | 2003 |
| TOT2TEN Ltd | Wholesale & retail | 2019 |