| Tempmark Limited | Manufacturing | 1980 |
| Tenta Solutions Ltd | Administrative & support | 2025 |
| Terrafirmaelectrical Ltd | Manufacturing | 2019 |
| Testa Flat Roofing Ltd | Construction | 2018 |
| Testing Plus Limited | Information & communication | 2025 |
| TFH Business Consulting Ltd | Professional & scientific | 2019 |
| THE Aesthetics and Skin Co Group Ltd | Other services | 2026 |
| THE Apollo Turkish Barbers Limited | Other services | 2024 |
| THE Content Paige Ltd | Professional & scientific | 2025 |
| THE Country Carpenter Ltd | Manufacturing | 2023 |
| THE Cowshed Tearooms Ltd | Hospitality | 2017 |
| THE Crafty One Ltd | Hospitality | 2019 |
| THE Dale Abbey Campsite Ltd | Hospitality | 2025 |
| THE Dewdrop Inn,Ilkeston Junction Ltd | Hospitality | 2020 |
| THE Drivers HQ Ltd | Wholesale & retail | 2020 |
| THE Durham OX (Ilkeston) Limited | Hospitality | 2018 |
| THE East Midlands Lawn Care Company Ltd | Administrative & support | 2021 |
| THE Evans-Bethell Settlement 2022 Limited | Financial services | 2021 |
| THE Flower Press Shed Ltd | Administrative & support | 2024 |
| THE Gallows Inn Ltd | Hospitality | 2025 |
| THE General Havelock (Ilkeston) Ltd | Hospitality | 2026 |
| THE General Havelock PUB & Restaurant Limited | Hospitality | 2024 |
| THE Giants Lair Limited | Arts & recreation | 2021 |
| THE Giltbrook Dyers & Cleaners (Holdings) Limited | Administrative & support | 2011 |
| THE Glazing Guys Limited | Construction | 2026 |
| THE Hair LAB Notts Ltd | Other services | 2024 |
| THE Hub (a Place to Meet) Limited | Hospitality | 2024 |
| THE Image Works (Nottingham) Limited | Professional & scientific | 2004 |
| THE Interiors Yard Ltd | Wholesale & retail | 2020 |
| THE Lanes Day Nursery Limited | Administrative & support | 2006 |
| THE LH Beauty & Aesthetics Company Ltd | Other services | 2019 |
| THE Manor Bar & Catering Ltd | Hospitality | 2008 |
| THE Manor Club Retail Limited | Wholesale & retail | 2013 |
| THE Manor Fitness & Squash Club Ltd | Arts & recreation | 2008 |
| THE Manor Health & Racquets Limited | Arts & recreation | 2013 |
| THE New Munchbox Ltd | Hospitality | 2024 |
| THE New Ritz Collective Limited | Arts & recreation | 2026 |
| THE Pines Day Nursery Limited | Health & social care | 2021 |
| THE Portage Ventures Limited | Health & social care | 2012 |
| THE Power of 30 Limited | Arts & recreation | 2016 |
| THE Product Mill Ltd | Wholesale & retail | 2018 |
| THE Reading Guide Company Limited | Information & communication | 2000 |
| THE Results Space Ltd | Arts & recreation | 2024 |
| THE Salty Sea COD Ltd | Hospitality | 2020 |
| THE Sheiling Ltd | Hospitality | 2025 |
| THE Site Cafe Ltd | Hospitality | 2026 |
| THE Sorting Centre Ltd | Transport & logistics | 2025 |
| THE Stanton Cask Limited | Hospitality | 2023 |
| THE TAP Consultants Limited | Professional & scientific | 2003 |
| THE Taxidermy Emporium Limited | Wholesale & retail | 2011 |
| THE TUB Chair Shop Limited | Wholesale & retail | 2012 |
| THE Unseen Empire Holdings Ltd | Financial services | 2025 |
| THE Unsheathed Ltd | Wholesale & retail | 2025 |
| THE Waste Project Midlands Limited | Water & waste | 2025 |
| THE Wedding Boutique Ilkeston Limited | Wholesale & retail | 2022 |
| THE Wellness Foundry Ltd | Health & social care | 2023 |
| THE Wright Floor Limited | Construction | 2025 |
| Thedailygrind Limited | Hospitality | 2024 |
| Thergis Holdings Ltd | Financial services | 2026 |
| This IS Stratum Ltd | Information & communication | 2019 |
| Thompsons Property Ltd | Real estate | 2024 |
| Thorpe Building Solutions Ltd | Construction | 2026 |
| Thorpe GAS Services Ltd | Administrative & support | 2024 |
| Thorpes Plumbing & Heating Services Ltd | Construction | 2026 |
| Thracians Ltd | Construction | 2023 |
| Threeshires Limited | Professional & scientific | 2003 |
| Tidaxia Ltd | Transport & logistics | 2025 |
| Tidy Boilers and Bathrooms Ltd | Construction | 2015 |
| Tidyspark Solutions Ltd | Administrative & support | 2025 |
| Tileandfloorstore Ltd | Construction | 2020 |
| Tillett Enterprises Ltd | Financial services | 2025 |
| TIM Fawkes Ltd | Professional & scientific | 2013 |
| TIM Jackson Denture Services Ltd | Health & social care | 2024 |
| TKC PVT Ltd | Transport & logistics | 2025 |
| TLF Utilities Limited | Construction | 2007 |
| Tlni Ltd | Education | 2025 |
| TMD Buildings Ltd | Real estate | 2026 |
| TN Insulations Ltd | Construction | 2019 |
| Tomgaff Ltd | Real estate | 2018 |
| Tommy’S Motors Ltd | Wholesale & retail | 2021 |
| Top Mark Conversions Ltd | Construction | 2022 |
| Topit Solutions Limited | Information & communication | 2003 |
| Toplis & Skip Ltd | Construction | 2025 |
| Topyurt Innovations Ltd | Construction | 2025 |
| Total Home Improvements (Ilkeston) Ltd | Construction | 2025 |
| Total Precision Limited | Manufacturing | 2013 |
| Total Thermal Services Limited | Construction | 2012 |
| Touchofthaiilkeston Ltd | Other services | 2025 |
| Townsend Property Solutions Ltd | Real estate | 2020 |
| TP8C Ltd | Information & communication | 2019 |
| Tracey Concrete Stanton Limited | Manufacturing | 2023 |
| Tracking My Car Ltd | Wholesale & retail | 2019 |
| Trade Frames Ilkeston Ltd | Manufacturing | 2019 |
| Trade Frames Nottingham Limited | Wholesale & retail | 2011 |
| Trademutlu Limited | Construction | 2023 |
| Trading Automotive Ltd | Wholesale & retail | 2024 |
| Tradingjie Limited | Hospitality | 2024 |
| Tradingliu Limited | Hospitality | 2025 |
| Trailer Service and Repair Limited | Manufacturing | 2006 |
| Transit Medical Response Limited | Health & social care | 2019 |