| Tigao Consulting Ltd | Professional & scientific | 2015 |
| Tiger Power Ltd | Manufacturing | 2018 |
| Tigerbite Limited | Professional & scientific | 2005 |
| Tight Head Ltd | Real estate | 2019 |
| Tigtag Solutions Limited | Professional & scientific | 2014 |
| Tiher Group Limited | Wholesale & retail | 2025 |
| Tillbridge Investments Limited | Construction | 2024 |
| Tillbridge Tastery Limited | Hospitality | 2014 |
| Tillys (Lincoln) Limited | Hospitality | 2018 |
| Tillys Tea and Gift Shop Ltd | Hospitality | 2022 |
| Tilmar Ltd | Professional & scientific | 2015 |
| Tiltport Limited | Information & communication | 1983 |
| Tilvin Investments Ltd | Financial services | 2022 |
| TIM Leach Ltd | Construction | 2014 |
| TIM Milner Consultancy Limited | Professional & scientific | 2014 |
| Timber Pro Wood Yard Limited | Wholesale & retail | 2020 |
| Timberland Controls Ltd | Construction | 2003 |
| Timbershore Limited | Real estate | 1978 |
| Timberulove Limited | Construction | 2018 |
| Time Speed & Coin Limited | Wholesale & retail | 2025 |
| Time to First Bite Limited | Professional & scientific | 2024 |
| Timeless-Aesthetics& Beauty Ltd | Other services | 2024 |
| TIN Cat Entertainment Ltd | Arts & recreation | 2019 |
| Tina Townsend Limited | Wholesale & retail | 2020 |
| Tindale Limited | Extraterritorial | 2023 |
| Tingers Childcare Ltd | Health & social care | 2021 |
| Tinsley 2016 Limited | Real estate | 2016 |
| Tinsley Holdings 2016 Limited | Professional & scientific | 2016 |
| Tinsley Services Limited | Wholesale & retail | 2024 |
| Tiny HAT Big Feelings Ltd | Wholesale & retail | 2026 |
| Tiny Medic Ltd | Public administration | 2023 |
| Tiny Tech Ltd | Other services | 2013 |
| Tiny Torque Limited | Wholesale & retail | 2025 |
| Tirko Ltd | Hospitality | 2017 |
| Tise Medicare Ltd. | Health & social care | 2013 |
| Titchwell Barns (Management) Limited | Administrative & support | 1995 |
| Title One Ltd | Arts & recreation | 2023 |
| TJ10 Properties Ltd | Construction | 2021 |
| TJH (Events) Limited | Professional & scientific | 2002 |
| TKD Consultant Ltd | Professional & scientific | 2025 |
| TKF Property Limited | Real estate | 2006 |
| Tknva Partners LLP | | 2021 |
| TL Blyth & Co Ltd | Manufacturing | 2020 |
| TLC Commercial Lettings Ltd | Real estate | 2016 |
| TLC Secure Services Ltd | Administrative & support | 2022 |
| Tlconsultancy Limited | Professional & scientific | 2015 |
| TLR Bookkeeping & Taxation Ltd | Professional & scientific | 2017 |
| TM Creative Limited | Professional & scientific | 2008 |
| TM Motoring Ltd | Professional & scientific | 2023 |
| Tm-Cardiology Ltd | Health & social care | 2017 |
| Tmchouse Limited | Hospitality | 2019 |
| TMG Media Limited | Wholesale & retail | 2018 |
| TMH Investments Ltd | Real estate | 2018 |
| TMK Homes Ltd | Real estate | 2025 |
| TMS Integrated Service Ltd | Construction | 2025 |
| Tmsj Limited | Real estate | 2024 |
| TMT Construction&Developments Ltd | Construction | 2017 |
| Tmtr Solutions Limited | Information & communication | 2023 |
| Tnfc Ltd | Manufacturing | 2024 |
| Toadstool Technologies Limited | Information & communication | 2002 |
| Tobalf Ecommerce Limited | Wholesale & retail | 2024 |
| Toby Ltd | Extraterritorial | 2022 |
| TOC 2025 Ltd | Hospitality | 2025 |
| TOC LN5 Ltd | Hospitality | 2019 |
| Todaytomorrow Limited | Financial services | 2026 |
| Todds Business Systems Limited | Manufacturing | 1999 |
| TOK Agency Ltd | Professional & scientific | 2022 |
| Tokarski Transport Ltd | Transport & logistics | 2018 |
| Toll Bar Equestrian Limited | Education | 2016 |
| Tollie Holdings Ltd | Financial services | 2026 |
| TOM Breeton Studio Ltd | Professional & scientific | 2025 |
| TOM Gelder Vehicle Services Ltd | Wholesale & retail | 2024 |
| Tom's Barbers Limited | Other services | 2018 |
| Tom's of Lincoln Limited | Other services | 2026 |
| Tomley Media Ltd | Information & communication | 2020 |
| Tomlin Ventures Limited | Wholesale & retail | 2011 |
| Tomlins Surgical Ltd | Health & social care | 2017 |
| Toms Holdings Ltd | Health & social care | 2024 |
| Tomtuckdrylining Ltd | Construction | 2023 |
| Tona ALL Purpose Ltd | Manufacturing | 2025 |
| Tonner Decorators Ltd | Construction | 2021 |
| Tonny's Kitchen Ltd | Hospitality | 2022 |
| Tony Arber Butchers Limited | Wholesale & retail | 2003 |
| Tony Green Steam Models Ltd | Manufacturing | 2013 |
| Tony Spink Coins Ltd | Wholesale & retail | 2015 |
| Top CUT Hair Ltd | Other services | 2025 |
| Top Farm Enterprises Ltd | Agriculture & fishing | 2022 |
| Top HAT Samurai Ltd | Information & communication | 2018 |
| Top Knot Nottingham Ltd | Other services | 2024 |
| Top Mini Market Lincoln Ltd | Wholesale & retail | 2025 |
| Top WOK 188 Limited | Hospitality | 2025 |
| Topaz Global Distribution Limited | Wholesale & retail | 2005 |
| Topaz Hospitality Ltd. | Professional & scientific | 2020 |
| Topham Capital | Financial services | 2017 |
| Topline Cars Ltd | Wholesale & retail | 2023 |
| Topline Hydrotherapy Ltd | Extraterritorial | 2023 |
| Torksey Car Boot Limited | Other services | 2025 |
| Torksey Caravans Limited | Wholesale & retail | 2001 |
| Toro Advisory Limited | Professional & scientific | 2020 |
| Torque Engineering Limited | Manufacturing | 2002 |