| THE Burger Beast North East Limited | Hospitality | 2025 |
| THE Bush Consultancy Limited | Professional & scientific | 1989 |
| THE Cables Group Ltd | Financial services | 2023 |
| THE Cake Ritual Ltd | Manufacturing | 2025 |
| THE Cane Factory Limited | Wholesale & retail | 1999 |
| THE Car Wash Company Ltd | Other services | 2017 |
| THE Car Wash Walla Ltd | Wholesale & retail | 2019 |
| THE Car Whisperer Ltd | Wholesale & retail | 2018 |
| THE Card Cafe Ltd | Wholesale & retail | 2025 |
| THE Care Coach (Nesta) Ltd | Professional & scientific | 2018 |
| THE Care DOC Limited | Health & social care | 2019 |
| THE Care in OUR Castle Ltd | Construction | 2024 |
| THE Carriage (Newcastle) Limited | Hospitality | 2007 |
| THE Carrosserie Company (UK) Limited | Wholesale & retail | 2001 |
| THE Catholic Fellowship (Newcastle) the ST. Bernadette Club | Other services | 2009 |
| THE Cedars (Birtley) Limited | Real estate | 2023 |
| THE Centre for Writing and Publishing Limited | Financial services | 2026 |
| THE Centre London Limited | Professional & scientific | 2010 |
| THE Chamber Group Ltd | Hospitality | 2025 |
| THE Charlton Group Limited | Wholesale & retail | 1999 |
| THE Childrens' Foundation Limited | Other services | 1990 |
| THE Chinese Centre (North of England) Ltd | Other services | 1999 |
| THE Chocolate Tiger Company Limited | Extraterritorial | 1999 |
| THE Christian Institute | Other services | 1991 |
| THE Chronicle Sunshine Fund | Health & social care | 2009 |
| THE City of Oxford Motor Services Limited | Transport & logistics | 1906 |
| THE Claims Partnership Limited | Other services | 1999 |
| THE Classic Car Company (NE) Ltd | Wholesale & retail | 2018 |
| THE Clay Oven Chapel House West Ltd | Hospitality | 2024 |
| THE Clay Oven Spice Ltd | Hospitality | 2026 |
| THE Clean Wean Ltd | Hospitality | 2025 |
| THE Cleaning and Janitorial Company Ltd | Administrative & support | 2026 |
| THE Clinic Foundation | Health & social care | 2020 |
| THE Clubbe LLP | | 2025 |
| THE Cluny (Newcastle) Events Limited | Arts & recreation | 2016 |
| THE Cluny (Newcastle) Limited | Hospitality | 2016 |
| THE Cluny 2 Limited | Arts & recreation | 2017 |
| THE Cluny Events (North East) CIC | Arts & recreation | 2025 |
| THE Cluny Group Limited | Financial services | 2021 |
| THE Cocktail Box Trailer Bar Ltd | Hospitality | 2019 |
| THE Codename Group Ltd | Professional & scientific | 2025 |
| THE Coffin Company (NE) Limited | Other services | 2011 |
| THE Coggs Management Company Limited | Real estate | 2002 |
| THE Cold Room LAB Ltd | Manufacturing | 2026 |
| THE Collective by V&V Ltd | Real estate | 2025 |
| THE Comfy Workplace Limited | Administrative & support | 2016 |
| THE Commercial Guys Ltd | Real estate | 2023 |
| THE Common Room of the Great North Limited | Arts & recreation | 2017 |
| THE Confidence Coach Stocksfield Ltd | Arts & recreation | 2025 |
| THE Conveyancing Partnership Limited | Information & communication | 2015 |
| THE Copse (Blyth) Management Company Limited | Real estate | 2008 |
| THE Coquetdale Music Trust | Arts & recreation | 2013 |
| THE Cosplay King Ltd | Wholesale & retail | 2025 |
| THE Cost Management Consultants Ltd | Professional & scientific | 2019 |
| THE Couple That Bakes Limited | Manufacturing | 2023 |
| THE Court House Management Company (Northern) Limited | Real estate | 2006 |
| THE Cozy Bear Ltd | Hospitality | 2025 |
| THE Crack Limited | Information & communication | 2000 |
| THE Crescent (RH1 6LD) Freehold Company Ltd | Extraterritorial | 2012 |
| THE Crown Inn (Elton) Limited | Hospitality | 2008 |
| THE Ctrl PAD Ltd | Information & communication | 2018 |
| THE Curious Cat Company Limited | Extraterritorial | 1997 |
| THE Cycle Hub Limited | Arts & recreation | 2012 |
| THE Damp & ROT Company Limited | Construction | 2012 |
| THE Data Darkroom Limited | Information & communication | 2025 |
| THE Days of RAJ Ltd | Hospitality | 2024 |
| THE Deli Newcastle Limited | Hospitality | 2023 |
| THE Derwent Initiative | Education | 2008 |
| THE Detail House Limited | Education | 2019 |
| THE Deuchars Management Company Limited | Real estate | 2015 |
| THE Diamante Rooms Ltd | Other services | 2020 |
| THE Digital Lighthouse Ltd | Professional & scientific | 2024 |
| THE Diner (Newcastle) Ltd | Hospitality | 2013 |
| THE Diner Fenham Ltd | Hospitality | 2024 |
| THE Divergence Works CIC | Health & social care | 2023 |
| THE DO Nation Enterprise Limited | Other services | 2013 |
| THE Dog B&B Ltd | Other services | 2026 |
| THE Doggy Day Care Centre Ltd | Other services | 2019 |
| THE Dolls Tanning Group Ltd | Other services | 2025 |
| THE Doner LAB Ltd | Hospitality | 2025 |
| THE Downs (Management) Limited | Households | 1994 |
| THE Drive END Engineering Company Limited | Professional & scientific | 2017 |
| THE Dubliner Newcastle Ltd | Hospitality | 2023 |
| THE Dubliner York Ltd | Hospitality | 2024 |
| THE Dunes Hotel Ltd | Hospitality | 2012 |
| THE Durham OX Warwickshire Limited | Hospitality | 2017 |
| THE EAR Cleaning Clinic Ltd | Health & social care | 2022 |
| THE Earth Tree Wood Ltd | Professional & scientific | 2021 |
| THE Economic Monitoring Company Limited | Professional & scientific | 2017 |
| THE Elders Council of Newcastle Limited | Other services | 2007 |
| THE Elegant Stem Studio Ltd | Wholesale & retail | 2026 |
| THE Elsie Davis Trust | Health & social care | 2020 |
| THE Emlee EVA Almond Trust Limited | Real estate | 2023 |
| THE Empowerment Room Ltd | Professional & scientific | 2015 |
| THE Enchanted Realm Ltd | Wholesale & retail | 2026 |
| THE END Matters CIC | Education | 2024 |
| THE Endowment Fund for Tacri | Agriculture & fishing | 2006 |
| THE Energy Supermarket Limited | Professional & scientific | 2018 |
| THE ENT Centre Limited | Construction | 2012 |
| THE Enterprise Service Limited | | 2011 |