| Teeforge Ltd | Manufacturing | 2026 |
| Teekayz Ltd | Wholesale & retail | 2024 |
| Tekkycharlie Limited | Manufacturing | 2025 |
| Tekline Limited | Professional & scientific | 2025 |
| Temperance Pictures Ltd. | Extraterritorial | 2015 |
| Templar Cars Limited | Wholesale & retail | 2010 |
| Temple Normanton Test Centre Limited | Wholesale & retail | 2004 |
| TEN Locks Village Management Company Limited | Households | 2019 |
| Tenacity Fitness Ltd | Arts & recreation | 2024 |
| Tenfish LLP | | 2025 |
| Tennant Metallurgical Group Limited | Wholesale & retail | 1960 |
| Tennant Metallurgical Holdings Ltd | Administrative & support | 2006 |
| Tennant Metallurgical Limited | Professional & scientific | 1983 |
| Tensh Ltd | Information & communication | 2022 |
| Terra Nova Equipment Limited | Manufacturing | 1993 |
| Terracotta Lion Ltd | Real estate | 2023 |
| Terrena Ltd | Real estate | 2019 |
| Tevatir Pizza Ltd | Hospitality | 2022 |
| TF Spray Solutions Ltd | Construction | 2025 |
| TG Engineering Limited | Administrative & support | 2026 |
| Tgas Chesterfield Limited | Construction | 2013 |
| TGB Mechanical and Electrical Ltd | Construction | 2019 |
| TGK Leisure Ltd | Hospitality | 2025 |
| Tglplant&Construction Ltd | Construction | 2025 |
| Thackeray Associates Accountants Ltd | Professional & scientific | 2016 |
| Thames Valley Heating Services Limited | Construction | 2019 |
| Thamestech Limited | Information & communication | 2025 |
| Thanks a Bunch Chesterfield Limited | Other services | 2018 |
| Tharavadu Stores Limited | Wholesale & retail | 2025 |
| That Recruiter Group Ltd | Administrative & support | 2024 |
| That Vintage Kilo Limited | Wholesale & retail | 2024 |
| THE Accountancy Recruitment Group Ltd | Administrative & support | 2017 |
| THE ACL Companies Limited | Financial services | 2011 |
| THE Agent (Lincoln) Ltd | Real estate | 2019 |
| THE Anchor Brampton Ltd | Hospitality | 2025 |
| THE Angel at Spinkhill Ltd | Hospitality | 2014 |
| THE Applied Technique Hub Ltd | Education | 2023 |
| THE Ariel Group Limited | Manufacturing | 1973 |
| THE Arker Group Ltd | Professional & scientific | 2023 |
| THE Arkwright Arms Ltd | Hospitality | 2024 |
| THE Association for Real Change | Health & social care | 1982 |
| THE Bakehouse @ Chesterfield Ltd | Wholesale & retail | 2025 |
| THE Barbershop Collective Ltd | Other services | 2023 |
| THE Barn Workshop Ltd | Manufacturing | 2026 |
| THE Beauty Boss Accoutant Ltd. | Professional & scientific | 2018 |
| THE Beauty House Glassyard Ltd | Other services | 2024 |
| THE Beauty Method Ltd | Wholesale & retail | 2026 |
| THE Beauty Shack (Chesterfield) Ltd | Other services | 2023 |
| THE Beer Parlour Chesterfield Limited | Hospitality | 2014 |
| THE Beer Yard Ltd | Wholesale & retail | 2021 |
| THE Best Partnership (UK) Limited | Wholesale & retail | 2003 |
| THE Big Red Food Shed Ltd | Health & social care | 2014 |
| THE Black Lion (Llanfair Talhaiarn) Ltd | Hospitality | 2015 |
| THE Boiler Shop Limited | Wholesale & retail | 2000 |
| THE Botanical Bothy Limited | Manufacturing | 2026 |
| THE Brick Tailor Ltd | Wholesale & retail | 2025 |
| THE Brow Sanctuary Ltd | Other services | 2024 |
| THE Canine Country Club 2020 Limited | Other services | 2020 |
| THE Car Barns Group Ltd | Wholesale & retail | 2014 |
| THE CBD Co Direct Ltd | Hospitality | 2019 |
| THE Chatsworth Wellbeing Centre | Health & social care | 2022 |
| THE Cheese Factor Ltd | Wholesale & retail | 2010 |
| THE Chesterfield Acupuncture Clinic Limited | Health & social care | 2000 |
| THE Chesterfield Canal Trust Limited | Other services | 1997 |
| THE Chesterfield Hearing Practice Limited | Health & social care | 2018 |
| THE Church on the BUS | Other services | 2007 |
| THE Clarity Crew Ltd | Professional & scientific | 2024 |
| THE Cleaning Crew for YOU Limited | Administrative & support | 2023 |
| THE Clutter Nutter Company Ltd | Other services | 2025 |
| THE Coffee Desk Ltd | Wholesale & retail | 2019 |
| THE Cold Plunge Company Ltd | Other services | 2022 |
| THE Complete Suite Co Limited | Wholesale & retail | 1999 |
| THE Concrete and Screed Company Ltd | Construction | 2024 |
| THE Construction Skills People Ltd | Education | 2008 |
| THE Copy & Print Centre (Chesterfield) Limited | Administrative & support | 2002 |
| THE Craft Beer Collaborative Ltd | Wholesale & retail | 2018 |
| THE Crooked Teapot Limited | Hospitality | 2012 |
| THE Crystal Lodges Ashover Ltd | Arts & recreation | 2013 |
| THE Curious Cocktail Company Ltd | Wholesale & retail | 2020 |
| THE Dales (Ashover) Management Company Limited | Administrative & support | 2002 |
| THE Defiant Co Ltd | Wholesale & retail | 2018 |
| THE Defiant Games Ltd | Arts & recreation | 2022 |
| THE DEN Workshop Ltd | Manufacturing | 2013 |
| THE Derbyshire Barn Co. Ltd | Real estate | 2025 |
| THE Divan Restaurant Ltd | Hospitality | 2022 |
| THE Doug Bros Ltd | Hospitality | 2024 |
| THE Ducky Cookie Company Limited | Hospitality | 2024 |
| THE E-Cig Shop Ltd | Wholesale & retail | 2013 |
| THE Electric Jerry CAN Company Ltd | Manufacturing | 2022 |
| THE ELM Foundation Ltd | Hospitality | 1989 |
| THE ELM Tree Syndicate Ltd | Hospitality | 2026 |
| THE Embroidery Shed Limited | Wholesale & retail | 2017 |
| THE Emote Partnership Limited | Professional & scientific | 2004 |
| THE English Kitchenware Company Limited | Extraterritorial | 1996 |
| THE English Tableware Company Limited | Extraterritorial | 1996 |
| THE European Academy of Sales and Sales Management Limited | Professional & scientific | 1996 |
| THE EV Yard Limited | Wholesale & retail | 2018 |
| THE FIG Collective Ltd | Professional & scientific | 2025 |
| THE Fist and Puppet Ltd | Hospitality | 2023 |
| THE Fitness Box Studios Ltd | Arts & recreation | 2017 |