| THE CUT LAB Limited | Other services | 2023 |
| THE Cyber Sign Company (UK) Limited | Administrative & support | 2002 |
| THE Debt Collector (UK) Limited | Other services | 1992 |
| THE Deene Park Trustee Company Limited | Financial services | 2025 |
| THE Domino Inn Limited | Hospitality | 2020 |
| THE Environmental Industries Association Limited | Other services | 2024 |
| THE EVS (Corby) Ltd | Hospitality | 2017 |
| THE Footwear Laundry Company Ltd | Administrative & support | 2026 |
| THE Glow Rooms at Halo Limited | Other services | 2025 |
| THE Good Season Co Ltd | Wholesale & retail | 2023 |
| THE Graysmith Holding Company Limited | Financial services | 2026 |
| THE Green Room Group Limited | Hospitality | 2021 |
| THE GT Specialist Ltd | Wholesale & retail | 2025 |
| THE Guitar GUY Ltd | Arts & recreation | 2020 |
| THE Hotel Inspector Ltd | Other services | 2011 |
| THE Impound UK Ltd | Wholesale & retail | 2025 |
| THE Infinity Group Property Management Ltd. | Households | 2022 |
| THE Internet Shop Ltd | Wholesale & retail | 2009 |
| THE Kindful CIC | Health & social care | 2025 |
| THE Market Square Bakery Limited | Wholesale & retail | 2018 |
| THE Mary Theu CIC | Health & social care | 2026 |
| THE Minerva Hub Ltd | Education | 2025 |
| THE Mkma Group Limited | Professional & scientific | 2025 |
| THE Mushh Room Ltd | Hospitality | 2018 |
| THE Nutrition and Lifestyle Clinic Ltd | Health & social care | 2018 |
| THE Oval (Nether Broughton) Management Company Limited | Households | 2022 |
| THE Packaging Site Ltd | Administrative & support | 2015 |
| THE Plough Inn at Caldecott Limited | Hospitality | 1997 |
| THE Power of Thought Limited | Wholesale & retail | 2020 |
| THE Powerline Advisory Group Limited | Households | 2020 |
| THE Premier Group Foundation Limited | Financial services | 2024 |
| THE Quill & Quiver Ltd | Wholesale & retail | 2025 |
| THE Radon Council Limited | Other services | 1991 |
| THE Real Popcorn Company Limited | Administrative & support | 2017 |
| THE Real Pork Crackling Company Limited | Manufacturing | 1992 |
| THE Real Pork Crunch Company Limited | Extraterritorial | 2012 |
| THE Real Pork Scratching Company Limited | Extraterritorial | 2012 |
| THE Real Pork Snack Company Limited | Administrative & support | 2012 |
| THE Staff Supply Company Limited | Other services | 2001 |
| THE Stonton Wyville Trustee Company Limited | Financial services | 2025 |
| THE Swasvitha Closet Ltd | Wholesale & retail | 2026 |
| THE Teamwork Trust | Health & social care | 1996 |
| THE Tech Partnership Limited | Extraterritorial | 2024 |
| THE Tool BUS Ltd | Wholesale & retail | 2025 |
| THE Ukdj Ltd | Administrative & support | 2017 |
| THE Utterly Brilliant PUB Company Ltd | Hospitality | 2019 |
| THE VAG Yard Ltd | Wholesale & retail | 2019 |
| THE Viking Club Limited | Other services | 2014 |
| THE Village Beauty by Julia Ltd | Other services | 2022 |
| THE Village Meat Club Northants Ltd | Transport & logistics | 2015 |
| THE WAX Leaf Candle Co Ltd | Manufacturing | 2021 |
| THE White Gloss Ltd | Construction | 2025 |
| THE White Hart Corby Limited | Hospitality | 2024 |
| THE Wholistic Midwife Limited | Health & social care | 2024 |
| THE Will Writer Group Ltd | Professional & scientific | 2026 |
| THE Wrap Agency Ltd | Administrative & support | 2020 |
| Thecandleco.Uk Ltd | Wholesale & retail | 2025 |
| Thelo Services Ltd | Administrative & support | 2020 |
| Themillman Ltd | Professional & scientific | 2025 |
| Thesmia.Ai Ltd | Information & communication | 2025 |
| Theu Properties Limited | Real estate | 2021 |
| Thirteen Haulage Ltd | Transport & logistics | 2025 |
| This JOB Limited | Transport & logistics | 2016 |
| Thistledown Barn Limited | Real estate | 2008 |
| Thistles DS Consultancy Ltd | Professional & scientific | 2023 |
| Thomas John Brown Recruitment Ltd | Administrative & support | 2023 |
| Thomas Macaulay Transport Limited | Transport & logistics | 2013 |
| Thomas Salvesen Enterprises Limited | Administrative & support | 2010 |
| Thompson Electrical Corby Limited | Construction | 2022 |
| Thor K9 Security Ltd | Administrative & support | 2026 |
| Threaded by JO Ltd | Manufacturing | 2026 |
| Three Bridges Private Practice LLP | | 2024 |
| Three of Hearts Ltd | Hospitality | 2019 |
| Thrift Trading Limited | Water & waste | 2014 |
| TI Health Limited | Health & social care | 2022 |
| Tian RUO Limited | Hospitality | 2023 |
| Tibor Balogh Limited | Wholesale & retail | 2025 |
| Tidsy Housing Care Ltd | Health & social care | 2026 |
| Tidy Home Cleaning Services Ltd | Administrative & support | 2023 |
| Tigers Facility Management Ltd | Administrative & support | 2026 |
| Tigers Security Services Ltd | Administrative & support | 2019 |
| Tiju Limited | Transport & logistics | 2023 |
| Timebook Ltd | Administrative & support | 2023 |
| Timofte Drylining Ltd | Construction | 2023 |
| Tinmac Trade Associates PVT Ltd | Administrative & support | 2026 |
| Tino Engineering Limited | Professional & scientific | 2020 |
| Tiny Fungi Ltd | Manufacturing | 2023 |
| TIP Top Catering Ltd | Hospitality | 2021 |
| Tip-Top Line Markings Ltd | Construction | 2021 |
| Tipngo Ltd | Administrative & support | 2014 |
| Titanium Fire and Security Limited | Administrative & support | 2017 |
| TJ Customs Ltd | Wholesale & retail | 2019 |
| Tj's Bodyshop Limited | Wholesale & retail | 2024 |
| TJL Management Limited | Real estate | 2013 |
| TJS Engineering Solutions Ltd | Professional & scientific | 2025 |
| Tkkozak Transport Ltd | Transport & logistics | 2019 |
| TLC Property Sales & Management Ltd | Real estate | 2016 |
| TLM Connect Ltd | Transport & logistics | 2019 |
| TM Social Work Limited | Health & social care | 2025 |
| TMB Logistic Solutions Ltd | Transport & logistics | 2018 |