| Khan Supplies Ltd | Administrative & support | 2022 |
| Khaneja (UK) Limited | Wholesale & retail | 2011 |
| Khaneja and SON Limited | Wholesale & retail | 2012 |
| Khaneja Brothers UK Limited | Hospitality | 2017 |
| Khaneja Properties Limited | Real estate | 2022 |
| Khanna Enterprise Ltd | Wholesale & retail | 2025 |
| Khatta Meetha Ltd. | Hospitality | 2018 |
| Khayrun Ltd | Wholesale & retail | 2025 |
| Khayyam and Co Ltd | Wholesale & retail | 2021 |
| Khela & Sons Ltd | Real estate | 2025 |
| Khela Group of Industries Ltd. | Manufacturing | 2014 |
| Kheyr Healthcare Ltd | Health & social care | 2023 |
| KHK Trading Limited | Wholesale & retail | 2020 |
| Khosa Holdings Limited | Real estate | 2015 |
| Khosla Commercial Properties Limited | Real estate | 2014 |
| Khosla Enterprises Limited | Administrative & support | 2011 |
| Khosla Group Limited | Extraterritorial | 2023 |
| Khosla House (Gatwick) Limited | Real estate | 2026 |
| Khosla House Limited | Real estate | 2016 |
| Khosla Investments Limited | Real estate | 2008 |
| Khosla Trading Estate Limited | Real estate | 2013 |
| KHR Management Ltd | Transport & logistics | 2023 |
| Khurana Convenience Ltd | Wholesale & retail | 2026 |
| Khurana Sons Ltd | Real estate | 2024 |
| Khurana UK Ventures Ltd | Real estate | 2025 |
| Khurana's Food & Wine Ltd | Wholesale & retail | 2020 |
| Khusalwarner Holdings Ltd | Real estate | 2024 |
| KIA Beauty Salon Ltd | Other services | 2020 |
| Kiall Holdings Ltd | Extraterritorial | 2025 |
| Kiall Homes Ltd | Real estate | 2025 |
| Kiani Real Estate Investment Ltd | Real estate | 2020 |
| Kiaz Property Ltd | Real estate | 2024 |
| Kick Sutra Limited | Wholesale & retail | 2026 |
| KIE Bedi Properties Ltd | Extraterritorial | 2024 |
| Kiing Realty Ltd | Real estate | 2024 |
| Kiing Travel Limited | Transport & logistics | 2025 |
| Kilburn Dental Ltd | Health & social care | 2022 |
| Kimjac Limited | Information & communication | 2014 |
| Kind Hearts Tree Limited | Education | 2022 |
| Kinderoos Holdings Limited | Financial services | 2021 |
| Kindlio Ltd | Administrative & support | 2022 |
| Kindnest Home Care Ltd | Health & social care | 2025 |
| Kindred Animals Ltd | Other services | 2026 |
| King Coffee UK Ltd | Hospitality | 2022 |
| Kingkarahi Hounslow Limited | Hospitality | 2023 |
| Kings Leisure Properties Ltd | Real estate | 2017 |
| Kingsfort Real Estate Limited | Real estate | 2017 |
| Kingsgate Recruitment Limited | Administrative & support | 2006 |
| Kingsley Meats Ltd | Wholesale & retail | 2021 |
| Kingsley Osteopaths Limited | Health & social care | 2026 |
| Kingsley Road Cars Ltd | Transport & logistics | 2010 |
| Kingslynn Haulage Ltd | Transport & logistics | 2019 |
| Kingston Road Projects Limited | Real estate | 2025 |
| Kingz Estates Limited | Real estate | 2002 |
| Kino Consultancy Limited | Information & communication | 2015 |
| Kinsley Super Store Limited | Wholesale & retail | 2023 |
| Kiran Electro Ltd | Wholesale & retail | 2025 |
| Kiran Food & Wine Ltd | Wholesale & retail | 2023 |
| Kiran Foods Limited | Hospitality | 2025 |
| Kiranfatimavision Ltd | Wholesale & retail | 2025 |
| Kiren Properties Ltd | Real estate | 2022 |
| Kirin Sall Ltd | Professional & scientific | 2021 |
| Kirpa Properties & Investment Ltd | Real estate | 2023 |
| Kirpa Real Estate Limited | Real estate | 2025 |
| Kirti Kala Mandir UK CIC | Arts & recreation | 2023 |
| Kiscorc Ltd | Information & communication | 2012 |
| Kish-Schuh Ltd | Real estate | 2020 |
| Kisozi Contractors Ltd | Construction | 2026 |
| Kitten Back Securities Ltd | Financial services | 2024 |
| Kiva Properties Limited | Real estate | 2025 |
| Kiwano Vapes Limited | Wholesale & retail | 2024 |
| KJ Marketing Management Limited | Professional & scientific | 2014 |
| KJV Property Investments Limited | Real estate | 2011 |
| KK Chauffeuring Ltd | Transport & logistics | 2025 |
| KK Pro Tax Accountants Ltd | Professional & scientific | 2021 |
| KK Trading Point Ltd | Wholesale & retail | 2020 |
| KK Window Cleaning Specialist Ltd | Administrative & support | 2021 |
| KKJ Active Ltd | Health & social care | 2025 |
| KKR Services Ltd | Administrative & support | 2022 |
| Kky&Co Ltd | Wholesale & retail | 2026 |
| KL Car Service Ltd | Transport & logistics | 2019 |
| KL Personal Training Limited | Education | 2025 |
| Klair Heights Ltd | Wholesale & retail | 2016 |
| Klassic Clothing Ltd | Wholesale & retail | 2014 |
| Kleem Home Care PVT Ltd | Health & social care | 2024 |
| Klikd Solutions Ltd | Information & communication | 2023 |
| KLK Services Ltd | Administrative & support | 2025 |
| KM IT Consulting Limited | Extraterritorial | 2025 |
| KMD Solutions Ltd | Wholesale & retail | 2021 |
| KNG Logistics UK Ltd | Wholesale & retail | 2024 |
| KNG London Property Ltd | Real estate | 2025 |
| Knight Young Co Limited | Real estate | 1997 |
| Knightsbridge Executive Cars Limited | Transport & logistics | 2013 |
| KNJ Ventures Ltd | Wholesale & retail | 2026 |
| KNS Hosting Ltd | Real estate | 2025 |
| KO Club Group Ltd | Hospitality | 2026 |
| KO Club Sports and Leisure CIC | Education | 2025 |
| Koan Ventures Limited | Professional & scientific | 2009 |
| Kodit Solutions Limited | Information & communication | 2017 |
| Kohj Ltd | Information & communication | 2020 |