| THE Hopping Hare Ltd | Hospitality | 2017 |
| THE Horse of Spain Ltd | Administrative & support | 2022 |
| THE Hospitality Alliance Ltd | Extraterritorial | 2009 |
| THE House (Finchley) Ltd | Hospitality | 2019 |
| THE House Enterprise Ltd | Real estate | 2015 |
| THE House of Gift Boxes Ltd | Wholesale & retail | 2026 |
| THE Hub - Advisory Limited | Extraterritorial | 2020 |
| THE Hub - Transport Advisory Limited | Professional & scientific | 2020 |
| THE Hub Advisory Holdings Limited | Financial services | 2025 |
| THE Huddle Community Ltd | Wholesale & retail | 2016 |
| THE Huddle Group Ltd | Information & communication | 2022 |
| THE Hudson Shopify Ltd | Wholesale & retail | 2024 |
| THE Hunsbury Hill Centre Limited | Hospitality | 2013 |
| THE Hyams Group Ltd | Professional & scientific | 2015 |
| THE Ice Bath and Sauna Company Ltd | Manufacturing | 2025 |
| THE ID LAB Ltd | Professional & scientific | 2015 |
| THE Immersive Technology Consultants Ltd | Information & communication | 2025 |
| THE Independent Connection Provider Limited | Energy | 2018 |
| THE Inkfluencer Ltd | Information & communication | 2025 |
| THE Inspire Group Northampton Ltd | Wholesale & retail | 2021 |
| THE Integration Executive Limited | Professional & scientific | 2008 |
| THE Interlink Franchisee Association Limited | Other services | 1992 |
| THE International Alliance of Als/Mnd Associations | Other services | 1999 |
| THE Investigation Group Limited | Financial services | 2024 |
| THE Italian Factor Ltd | Wholesale & retail | 2025 |
| THE Italian Shop (Northampton) Ltd | Wholesale & retail | 2025 |
| THE Jameson Works Limited | Information & communication | 2019 |
| THE Jenny Bistro UK Ltd | Hospitality | 2015 |
| THE JL Foodstation Ltd | Hospitality | 2025 |
| THE Jonathan Winston Victor Foundation Limited | Health & social care | 2022 |
| THE Jorden Summers Company | Extraterritorial | 2023 |
| THE Jungle @ Bips Limited | Hospitality | 2025 |
| THE Kabin Company (UK) Limited | Construction | 2019 |
| THE Kelham Island Brewery Limited | Manufacturing | 1997 |
| THE Kelmarsh Trust | Real estate | 1982 |
| THE Kind Mind Studio Limited | Wholesale & retail | 2021 |
| THE Kingsley Bakery Ltd | Wholesale & retail | 2019 |
| THE Kingsmith Construction Group Limited | Administrative & support | 2010 |
| THE Kislingbury Sun Investment Co Limited | Hospitality | 2013 |
| THE Kislingbury Sun Limited | Hospitality | 2013 |
| THE Kitchen Garden Company Limited | Construction | 2002 |
| THE KLE (Berwick) Group Ltd | Transport & logistics | 2019 |
| THE Klever Kitchen Company Ltd | Manufacturing | 2023 |
| THE Knot Courteenhall Limited | Wholesale & retail | 2026 |
| THE Knowledge GEM Ltd | Information & communication | 2025 |
| THE Langley Group Europe Ltd | Information & communication | 2022 |
| THE Language Partnership Limited | Professional & scientific | 2005 |
| THE Learning Company International Ltd. | Professional & scientific | 2016 |
| THE Learning Vault Ltd | Education | 2015 |
| THE Leather Hawk Ltd | Wholesale & retail | 2026 |
| THE Leeds Dental Team Limited | Health & social care | 2006 |
| THE Legendary Bodyshapers Gym Ltd | Arts & recreation | 2023 |
| THE Lemon Tree Cafe Ltd | Manufacturing | 2018 |
| THE Letting Agents 1977 Ltd | Real estate | 2024 |
| THE Lift Industry Mental Health Charter CIC | Education | 2023 |
| THE Lindens Management Company Limited | Real estate | 1987 |
| THE Lindens RTM Company Ltd | Households | 2024 |
| THE Linen and Thread Company Limited | Real estate | 1998 |
| THE Little Bakery of Happiness Limited | Manufacturing | 2017 |
| THE Little Cake Box Ltd | Manufacturing | 2024 |
| THE Little PUB Group (UK) Limited | Hospitality | 2013 |
| THE Littletons (Manor Road) Management Company Limited | Households | 2003 |
| THE Loft Specialists Limited | Construction | 2021 |
| THE Logistics Engineers Ltd | Professional & scientific | 2019 |
| THE Loony Shop Ltd | Wholesale & retail | 2024 |
| THE Lounge Wfsc Ltd | Real estate | 2018 |
| THE Lounge Wfsc YK Ltd | Hospitality | 2024 |
| THE Loving Chef Ltd | Manufacturing | 2023 |
| THE Loyalty Assistant Ltd | Administrative & support | 2017 |
| THE LUN Ltd | Financial services | 2024 |
| THE Lynden Court Hotel Limited | Hospitality | 2006 |
| THE Mahlangus Limited | Other services | 2026 |
| THE Maitland Property Group Ltd | Real estate | 2025 |
| THE Malabar Treat Ltd | Hospitality | 2024 |
| THE Mallows Company (Bozeat) Limited | Information & communication | 2009 |
| THE Maltings Management Company (Market Harborough) Limited | Administrative & support | 2003 |
| THE MAN Cave Barbershop Ltd | Other services | 2023 |
| THE Management and Consultancy Hub Ltd | Administrative & support | 2016 |
| THE Mandalay Group Ltd | Construction | 2018 |
| THE Manor House Residents Management Company Limited | Households | 2012 |
| THE Manor Ironing Services Ltd | Other services | 2019 |
| THE Market Cartel Limited | Wholesale & retail | 2015 |
| THE Marketing Box Ltd | Professional & scientific | 2025 |
| THE Marketing Effect Ltd | Professional & scientific | 2006 |
| THE Marque Global Ltd | Education | 2012 |
| THE Matching Principle Limited | Professional & scientific | 2010 |
| THE Meadows (Quinton Lodge) Management Company Limited | Households | 2001 |
| THE Memory Bar Limited | Professional & scientific | 2024 |
| THE Mensah Wellbeing Group Ltd | Professional & scientific | 2026 |
| THE Methodist Homestead | Hospitality | 2012 |
| THE Methodist Revival Church for ALL Nations | Other services | 2011 |
| THE Millers Northampton Management Company Limited | Extraterritorial | 2001 |
| THE Mobile Carpet Showroom Limited | Wholesale & retail | 2007 |
| THE Mobile Floorin Company Limited | Wholesale & retail | 2023 |
| THE Mobile Garage Limited | Wholesale & retail | 2009 |
| THE Mobile Pitstop Ltd | Extraterritorial | 2025 |
| THE Modern Builder Limited | Construction | 2023 |
| THE Modern Family Law Company Limited | Professional & scientific | 2020 |
| THE MOM Club Limited | Extraterritorial | 2021 |
| THE Moorings (Phase 1) Daventry Management Company Limited | Households | 2005 |