| THE Luxury Group (Holdings) Ltd | Wholesale & retail | 2026 |
| THE MAD Brewer PUB Company Limited | Manufacturing | 2022 |
| THE MAD Brewer's Lcah Limited | Manufacturing | 2023 |
| THE MAD Brewers Angel ALE House Ltd | Hospitality | 2025 |
| THE Meltham Accountant Ltd | Professional & scientific | 2017 |
| THE Mid-Derbyshire Association for Mobile Physiotherapy | Health & social care | 2005 |
| THE Mobile Mini Farm Ltd | Agriculture & fishing | 2019 |
| THE Moreton Barns Management Company Limited | Households | 2005 |
| THE National Cycling Centre Limited | Extraterritorial | 2016 |
| THE North Star Estates Group Limited | Real estate | 2025 |
| THE Nottingham Academy of Performing Arts Ltd | Administrative & support | 2025 |
| THE Oak Over Arms Limited | Hospitality | 2022 |
| THE Old Barn (Swinscoe) Ltd | Hospitality | 2014 |
| THE Park Hall Management Company Limited | Real estate | 2005 |
| THE Peak Canopy Company Ltd | Hospitality | 2025 |
| THE Red Lion at Kniveton Limited | Hospitality | 2020 |
| THE Roebuck (Draycott) Limited | Hospitality | 2016 |
| THE Roebuck Brewing Company Limited | Manufacturing | 2016 |
| THE Saracens Head (Shirley) Ltd | Hospitality | 2025 |
| THE School Puzzle Company Limited | Education | 2016 |
| THE School Team Building Company Limited | Education | 2015 |
| THE Smoking Area Ltd | Wholesale & retail | 2025 |
| THE Spinney Brimmington Limited | Construction | 2024 |
| THE Stable Shop Limited | Wholesale & retail | 2010 |
| THE Sunflower Jewellery Co Ltd | Wholesale & retail | 2026 |
| THE TIN HUT Cafe Company Limited | Hospitality | 2022 |
| THE Tiny Cottage Company Ltd | Wholesale & retail | 2023 |
| THE Tipsy Candle Co. Ltd | Wholesale & retail | 2026 |
| THE UK Hypnotherapy Training College Limited | Education | 2002 |
| THE Warsop Farms Partnership LP | | 2012 |
| THE Willows Caravan Services Ltd | Transport & logistics | 2022 |
| THE Workwear Group Ltd | Wholesale & retail | 2025 |
| THE X Bond Company Limited | Financial services | 2007 |
| Theclayroomspeak Ltd | Arts & recreation | 2024 |
| Thompsford Holdings Ltd | Real estate | 2022 |
| Thorley Bros Limited | Wholesale & retail | 2007 |
| Thorswood Farm Shop Limited | Wholesale & retail | 2021 |
| THQ Ashbourne Ltd | Arts & recreation | 2021 |
| Tiberinus Ltd | Professional & scientific | 2021 |
| Tikmany’S Ltd | Wholesale & retail | 2023 |
| Tilsley Community Services Ltd | Transport & logistics | 2025 |
| TIM & Co Coaching Ltd | Other services | 2021 |
| Timbaninja Ltd | Construction | 2018 |
| Timeless Clothing Ltd | Manufacturing | 2026 |
| Tissington Kindergarten Limited | Education | 2015 |
| Tissington Leisure Ltd | Arts & recreation | 2024 |
| Tissington Nursery School Limited | Financial services | 2025 |
| Tissington Shoot Limited | Agriculture & fishing | 2016 |
| TJG Investments Limited | Financial services | 2014 |
| TLC4 Smiles (Ashbourne) LLP | | 2009 |
| TMP Event Structures Limited | Administrative & support | 2009 |
| Tnoi Limited | Health & social care | 2026 |
| TO Love and to Cherish Ltd | Wholesale & retail | 2016 |
| Toby Tucker Landscaping Ltd | Administrative & support | 2024 |
| Token Comms Limited | Manufacturing | 2014 |
| TOM and Douglas Barn Properties Ltd | Financial services | 2014 |
| TOM and Douglas Barns Ltd | Hospitality | 2014 |
| Top Deck Steel Decking Ltd | Construction | 2019 |
| Top Drawer Antiques Ltd | Wholesale & retail | 2002 |
| Top NET Safety Netting Ltd | Extraterritorial | 2020 |
| Top Weld Studwelding Ltd | Extraterritorial | 2020 |
| Topline Equestrian Ltd | Arts & recreation | 2020 |
| Topline Physiotherapy Limited | Professional & scientific | 2014 |
| Tornado Motorsport Limited | Manufacturing | 2010 |
| Torriano Entertainment Group Ltd | Information & communication | 2022 |
| Total Health and Wellbeing Limited | Professional & scientific | 2015 |
| Town END Property Solutions Ltd | Construction | 2019 |
| TPC Cleaning Ltd | Administrative & support | 2026 |
| TPC Cleaning Services LLP | | 2024 |
| Tractor Spare Parts Ltd | Wholesale & retail | 2013 |
| Tradefast Builders Ltd | Construction | 2007 |
| Tranquil Assets Limited | Wholesale & retail | 2008 |
| TRANSITION2ELITE Sports Management Ltd | Arts & recreation | 2023 |
| Travel Chair Limited | Wholesale & retail | 2022 |
| Trench Group Limited | Administrative & support | 2022 |
| Trinity Partners Holdings (UK) Limited | Financial services | 2022 |
| Trinity Partners Limited | Manufacturing | 2008 |
| Trouw (UK) Limited | Manufacturing | 1934 |
| Trouw (UK) Pension Trust Limited | Agriculture & fishing | 1994 |
| Trublue Limited | Information & communication | 2021 |
| Truckgear Ltd | Wholesale & retail | 2008 |
| Trxn Limited | Real estate | 2022 |
| Turpin Investments Limited | Real estate | 2016 |
| Turtle House Management Company Limited | Households | 1978 |
| Turtlestack Automation Ltd | Information & communication | 2020 |
| Twemlow Estates Ltd | Real estate | 2020 |
| Two Headed Films Ltd | Information & communication | 2023 |
| TX by Lauren Ellen Ltd | Wholesale & retail | 2021 |
| TYD Holdings Ltd | Real estate | 2020 |
| Tyremiles Limited | Wholesale & retail | 1948 |
| U-Go Plant Limited | Extraterritorial | 2021 |
| UK Energy Assessors Ltd | Professional & scientific | 2021 |
| Ukws Glazing Limited | Financial services | 2020 |
| Ukws Group Limited | Financial services | 2018 |
| Ukws Limited | Construction | 1987 |
| Ukws Solar Limited | Extraterritorial | 2020 |
| Ultra Quest Ltd | Arts & recreation | 2025 |
| Unique Folding Table Pads Limited | Manufacturing | 2014 |
| V & S Equine UK Limited | Agriculture & fishing | 2018 |
| Vapta Systems Ltd | Professional & scientific | 2021 |