| Key Living Property Ltd | Real estate | 2019 |
| Key Marketing Solutions Ltd | Professional & scientific | 2022 |
| Key Medical Supplies Ltd | Health & social care | 2020 |
| Key Mobility Limited | Wholesale & retail | 2001 |
| Key Provident Solutions Ltd | Information & communication | 2019 |
| Key West Pest Control (Midlands) Ltd | Administrative & support | 2012 |
| KEYHASH534 Ltd | Wholesale & retail | 2024 |
| Keyhives Services Ltd | Real estate | 2025 |
| Keyline Care Supported Living Services Limited | Health & social care | 2021 |
| Keyman Solutions Limited | Extraterritorial | 2018 |
| Keymash Testing Ltd | Information & communication | 2018 |
| KEYS2 Limited | Professional & scientific | 2021 |
| Keysol Limited | Information & communication | 2018 |
| Keystone Build Group Ltd | Construction | 2026 |
| Keystone Construction & Restoration Limited | Construction | 2026 |
| Keystone Innovation Limited | Professional & scientific | 2012 |
| Keystone IT Ltd | Information & communication | 2017 |
| Keystone Logistics Ltd | Transport & logistics | 2025 |
| Keystone Mortgages Ltd | Financial services | 2020 |
| Keystone Property & Construction Ltd | Manufacturing | 2025 |
| Keyte Holdings Ltd | Financial services | 2021 |
| Keyte Limited | Extraterritorial | 1987 |
| Keyte Smith Limited | Manufacturing | 2012 |
| Keythos Ltd | Professional & scientific | 2024 |
| Keyworth Barber Ltd | Other services | 2026 |
| Keyworth Builders Limited | Construction | 2022 |
| Keyworth Cars Limited | Transport & logistics | 2025 |
| Keyworth Consultancy & Training Ltd | Construction | 2004 |
| Keyworth Enterprises Ltd | Hospitality | 2020 |
| Keyworth Fish Bar Ltd | Hospitality | 2025 |
| Keyworth Indian Restaurant Limited | Hospitality | 2020 |
| Keyworth Medicine Ltd | Wholesale & retail | 2010 |
| Keyworth Scott Berenice Ltd | Information & communication | 2026 |
| Keyworth United Community Football Club Ltd | Arts & recreation | 2010 |
| Keza Group CIC | Education | 2026 |
| Kezco Limited | Extraterritorial | 2023 |
| KF Associates Ltd | Health & social care | 2024 |
| KF Bodyrepair Ltd | Wholesale & retail | 2025 |
| KF Digital Media Ltd | Wholesale & retail | 2024 |
| KFD2020 Ltd | Financial services | 2020 |
| KG Building Services Limited | Construction | 2025 |
| KG Clothing Limited | Wholesale & retail | 2025 |
| KG Health Ltd | Health & social care | 2020 |
| KG Innovate Ltd | Information & communication | 2024 |
| KG Land Limited | Extraterritorial | 2022 |
| KG Practice Ltd | Health & social care | 2020 |
| KG Properties & Investments Ltd | Real estate | 2022 |
| KG Transporte Ltd | Transport & logistics | 2026 |
| KGE Limited | Professional & scientific | 2025 |
| Kggi Ltd | Other services | 2014 |
| KGP Buxton Ltd | Real estate | 2026 |
| KGS Garden Services Ltd | Administrative & support | 2026 |
| KGW Carpentry & Joinery Limited | Construction | 2015 |
| KH Aesthetics Training Academy Limited | Education | 2024 |
| KH Chiropractic Clinic Limited | Health & social care | 2013 |
| KH Feltham 1 Ltd | Hospitality | 2021 |
| KH Feltham 2 Ltd | Hospitality | 2021 |
| KH Instrument Services Ltd | Professional & scientific | 2025 |
| KH Interim Technical Services Ltd | Hospitality | 2018 |
| KH Land/Build Ltd | Construction | 2022 |
| KH Lift Services Limited | Manufacturing | 2005 |
| KH Wolf Limited | Hospitality | 2025 |
| Khadijabakar Limited | Households | 2025 |
| Khadim Consultants Ltd | Professional & scientific | 2024 |
| Khalis Food PVT. Ltd | Manufacturing | 2024 |
| Khaliscare Ltd | Wholesale & retail | 2023 |
| Khalnex Limited | Information & communication | 2025 |
| Khalsa Builders Ltd | Construction | 2023 |
| Khamba Capital 2 Limited | Real estate | 2020 |
| Khamba Capital 3 Limited | Real estate | 2023 |
| Khamba Capital Limited | Real estate | 2020 |
| Khamba Ltd | Hospitality | 2011 |
| Khamba Properties 2 Limited | Real estate | 2018 |
| Khamba Properties 3 Limited | Real estate | 2019 |
| Khamba Properties Limited | Real estate | 2018 |
| Khamba Properties Maintenance Limited | Administrative & support | 2023 |
| Khan Builders (Derby) Ltd | Construction | 2018 |
| Khan Construction Ltd | Construction | 2023 |
| Khan Halal Meat & Poultry Limited | Wholesale & retail | 2018 |
| Khan Halal Meat Limited | Wholesale & retail | 2018 |
| Khan Ophthalmology Consulting Limited | Health & social care | 2026 |
| Khan Property Claims Consultancy Ltd | Financial services | 2026 |
| Khan Smiles Ltd | Health & social care | 2023 |
| Khan's Taekwon-Do Schools Limited | Arts & recreation | 2019 |
| Khanco Ltd | Wholesale & retail | 2026 |
| Khans Lowdham Ltd | Hospitality | 2025 |
| Khans Nursing Services Ltd | Health & social care | 2021 |
| Khans Tandoori Takeaway Limited | Hospitality | 2019 |
| Khansa Limited | Wholesale & retail | 2022 |
| Khansourcedit Ltd | Wholesale & retail | 2025 |
| Khanstudios Ltd | Professional & scientific | 2025 |
| Khattak Associates Limited | Administrative & support | 2013 |
| Khattak Consultancy Ltd | Professional & scientific | 2026 |
| Khattak Properties Group Limited | Construction | 2026 |
| Khattak's Ltd | Professional & scientific | 2025 |
| Khawaja Bros Ltd | Wholesale & retail | 2024 |
| KHB Coffee Ltd | Hospitality | 2023 |
| Khelec Ltd | Construction | 2021 |
| Khera Aesthetics Ltd | Health & social care | 2024 |
| Khera's Creations Ltd | Wholesale & retail | 2025 |