| Kapre Limited | Wholesale & retail | 2001 |
| Kapstone Communications Ltd | Information & communication | 2018 |
| Kaptan Limited | Wholesale & retail | 2025 |
| Kapu DIY Limited | Wholesale & retail | 2003 |
| Kapur Medical Consultancy Limited | Health & social care | 2011 |
| KAR Consultancy Limited | Information & communication | 2013 |
| KAR Housing Ltd | Real estate | 2025 |
| KAR Travel Limited | Administrative & support | 2010 |
| Karaama Fragrances Ltd | Manufacturing | 2017 |
| Karabay Consultants Ltd | Professional & scientific | 2026 |
| Karachi Broast Ltd | Hospitality | 2025 |
| Karachi Nehari House Limited | Hospitality | 2025 |
| Karacom Ltd | Wholesale & retail | 2026 |
| Karahi Kingh Ltd | Hospitality | 2018 |
| Karahi Kingh Property Ltd | Real estate | 2020 |
| Karahi Kins Village Ltd | Wholesale & retail | 2020 |
| Karaisen Ltd | Wholesale & retail | 2019 |
| Karak Chaii Coventry Road Ltd | Hospitality | 2023 |
| Karak Chaii GLR Ltd | Hospitality | 2024 |
| Karak Chaii Holdings Ltd | Hospitality | 2019 |
| Karak Chaii Limited | Hospitality | 2018 |
| Karak Chaii of London Limited | Hospitality | 2025 |
| Karak Chaii Soho Road Ltd | Hospitality | 2020 |
| Karakaram General Trading Limited | Wholesale & retail | 2021 |
| Karam Books and Arts Limited | Wholesale & retail | 2013 |
| Karam Remit Ltd | Financial services | 2026 |
| Karam-E-Elahi Foundation | Administrative & support | 2018 |
| Karamaa Limited | Health & social care | 2004 |
| Karamba Properties Ltd | Real estate | 2024 |
| Karamdad Holdings Ltd | Real estate | 2023 |
| Karamjit Singh Legal Services Limited | Professional & scientific | 2016 |
| Karan and Priyanka Limited | Real estate | 2025 |
| Karan Food and Wine Ltd | Wholesale & retail | 2023 |
| Karan Impex UK Limited | Wholesale & retail | 2013 |
| KARAN7 Limited | Wholesale & retail | 2020 |
| Karani LGV Services Ltd | Manufacturing | 2017 |
| Karat Goldsmiths Limited | Administrative & support | 2017 |
| Karbak Transport Limited | Transport & logistics | 2025 |
| Karbon Energy Ltd | Administrative & support | 2025 |
| Karchobi Limited | Wholesale & retail | 2025 |
| Kard Consultancy Services Ltd | Information & communication | 2017 |
| Kard Properties Ltd | Real estate | 2022 |
| Kardamom Consulting Limited | Information & communication | 2025 |
| Kardashian Estates Global Ltd | Real estate | 2023 |
| Kardia Consulting and Leasing Limited | Administrative & support | 2017 |
| Kardia Support and Accommodation Ltd | Health & social care | 2017 |
| Kareem & Hafeez Housing Ltd | Hospitality | 2025 |
| Kareem Ibrahim Ltd | Transport & logistics | 2025 |
| Karelink Limited | Health & social care | 1996 |
| Karen Page Associates Ltd | Public administration | 2012 |
| Karen Page Professional Services Limited | Health & social care | 2021 |
| Karen Saunders & Co PVT Ltd | Health & social care | 2024 |
| Karenjeet Sidhu Limited | Other services | 2018 |
| Kareo 6 Medical Ltd. | Professional & scientific | 2009 |
| Karhe Realty Limited | Real estate | 2025 |
| Karim Al-Shifa Ul-Hikma Ltd | Professional & scientific | 2023 |
| Karim Courier Ltd | Transport & logistics | 2025 |
| Karim JAN Properties Limited | Real estate | 2023 |
| Karim Market Ltd | Wholesale & retail | 2025 |
| Karim Meat Shop Ltd | Wholesale & retail | 2019 |
| Karim Medical Services Limited | Health & social care | 2013 |
| Karim Store Ltd | Wholesale & retail | 2015 |
| Karim T Ltd | Real estate | 2023 |
| Karim's Healthcare Locums Limited | Professional & scientific | 2021 |
| Karimson Homes Ltd | Real estate | 2020 |
| Karis Neighbour Scheme | Health & social care | 2008 |
| Karkhanis Limited | Health & social care | 2019 |
| Karl Stuart Ltd | Manufacturing | 2017 |
| Karl's Prestige Carz Limited | Wholesale & retail | 2017 |
| Karla Homes Limited | Real estate | 2020 |
| Karlex Care Limited | Health & social care | 2009 |
| Karlex Roclyns Care Limited | Health & social care | 2015 |
| Karma Care & Housing CIC | Education | 2022 |
| Karma Jewellers Ltd | Wholesale & retail | 2019 |
| Karma Transport Ltd | Transport & logistics | 2023 |
| Karman Entertainment Limited | Arts & recreation | 2011 |
| Karmani Housing Limited | Hospitality | 2024 |
| Karmani Property Group Limited | Real estate | 2025 |
| Karmi Studios Ltd | Wholesale & retail | 2026 |
| Karmic Developments Limited | Real estate | 2019 |
| Karminder Karminder Ltd | Construction | 2024 |
| Karnail Estates Limited | Extraterritorial | 2015 |
| Karnic Fusion Ltd | Real estate | 2025 |
| Karol 1986 Ltd | Other services | 2019 |
| Karon Care Services Limited | Administrative & support | 2020 |
| Karow Properties Limited | Real estate | 2005 |
| Karra Construction Limited | Construction | 2002 |
| Karra's Place Limited | Extraterritorial | 2012 |
| Karren Enterprises HD Limited | Wholesale & retail | 2025 |
| Karren Enterprises Limited | Wholesale & retail | 2025 |
| Karrykart Ltd | Real estate | 2025 |
| Karsaz Ltd | Extraterritorial | 2019 |
| Kartar Capital Ltd | Real estate | 2023 |
| Kartar Consulting Ltd | Professional & scientific | 2008 |
| Kartar Foods UK Limited | Hospitality | 2025 |
| Kartell TM Ltd | Construction | 2024 |
| Karting (Birmingham) Limited | Arts & recreation | 2014 |
| Karting (East Midlands) Limited | Arts & recreation | 2023 |
| Karting (Halesowen) Limited | Arts & recreation | 2013 |
| Karting (Letchworth) Limited | Arts & recreation | 2014 |