| Kassma Ltd | Wholesale & retail | 2020 |
| Kast Bricklaying Ltd | Construction | 2026 |
| Kasul Cleaning Solution Ltd | Administrative & support | 2023 |
| KAT Residential Properties Ltd | Households | 2018 |
| Kata Studios Limited | Professional & scientific | 2026 |
| Katalina Recruitment Ltd | Administrative & support | 2024 |
| Katana Plastercraft Ltd | Information & communication | 2021 |
| Katapila Limited | Wholesale & retail | 2010 |
| Katara East Ltd | Hospitality | 2024 |
| Kataria Holdings 1 Limited | Real estate | 2025 |
| Kataria Holdings 2 Limited | Real estate | 2025 |
| Kataria Holdings 3 Limited | Real estate | 2025 |
| Kataria Holdings Ltd | Real estate | 2021 |
| Kataria Holdings Trading Limited | Real estate | 2025 |
| Kataria Partnership Ltd | Real estate | 2023 |
| Kathamba Holdings Limited | Financial services | 2025 |
| Katherine Investments Ltd | Real estate | 2013 |
| Katie Mauthoor Limited | Professional & scientific | 2024 |
| Katsuma Modern Japanese Ltd | Hospitality | 2017 |
| Katsuma Limited | Hospitality | 2020 |
| Katsuo Ltd | Construction | 2009 |
| Kauma Nest Ltd | Administrative & support | 2020 |
| Kaur Blimey Pictures Ltd | Information & communication | 2020 |
| Kaur Interiors Ltd | Professional & scientific | 2019 |
| Kaur Klarity Ltd | Health & social care | 2025 |
| Kaur Moments Ltd | Hospitality | 2022 |
| Kaus Loves Ltd | Hospitality | 2022 |
| Kausalya Consulting Limited | Real estate | 2019 |
| Kausalya Ltd | Real estate | 2016 |
| Kaussar Ltd | Wholesale & retail | 2023 |
| Kaveri Enterprises Limited | Real estate | 1996 |
| Kaveti UK Ltd | Information & communication | 2025 |
| Kawloontraders Ltd | Wholesale & retail | 2026 |
| KAX Limited | Administrative & support | 2018 |
| KAY & H Ltd | Transport & logistics | 2025 |
| KAY DEE Builder Ltd | Construction | 2025 |
| Kaya Studio Ltd | Administrative & support | 2016 |
| Kayal Global UK Ltd | Wholesale & retail | 2021 |
| Kayani Legal Limited | Professional & scientific | 2020 |
| Kayes Security Ltd | Other services | 2020 |
| Kayfades Ltd | Other services | 2026 |
| Kayjay Interiors Ltd | Construction | 2002 |
| Kayla Limited | Wholesale & retail | 2014 |
| Kaymaks Group Limited | Wholesale & retail | 2016 |
| Kaymer Ltd | Hospitality | 2024 |
| Kayrana Limited | Construction | 2022 |
| Kays Clothing Limited | Wholesale & retail | 2026 |
| Kaysons Enterprise Limited | Real estate | 1995 |
| KAZ Traders Limited | Wholesale & retail | 2024 |
| Kazbek Ltd | Construction | 2026 |
| Kazi Homes Ltd | Real estate | 2025 |
| Kazim Builders Limited | Construction | 2002 |
| Kazmi Holdings Ltd | Wholesale & retail | 2019 |
| Kazuki & Toshiro Limited | Wholesale & retail | 2025 |
| KB 95 Ltd | Wholesale & retail | 2024 |
| KB Builders London Limited | Construction | 2019 |
| KB Elysian Ltd | Hospitality | 2025 |
| KB Labs Ltd | Arts & recreation | 2025 |
| KB Luhman Limited | Hospitality | 2025 |
| KB Prime Real Estates Ltd | Real estate | 2024 |
| KB Shine Cleaning Services Ltd | Administrative & support | 2026 |
| Kbav Ltd | Construction | 2026 |
| KBB Builders Limited | Construction | 2009 |
| Kbea Ltd | Real estate | 2014 |
| KBL Construction Services Ltd | Construction | 2021 |
| Kboy Limited | Health & social care | 2013 |
| KBS Security Ltd | Administrative & support | 2022 |
| Kbsa Trading Ltd | Wholesale & retail | 2024 |
| KC Composites Limited | Manufacturing | 2013 |
| KC Electrical & DIY Limited | Wholesale & retail | 2009 |
| KC Kitchen Ltd | Hospitality | 2018 |
| KC Properties London Ltd | Real estate | 2020 |
| KCD Ltd | Real estate | 2023 |
| KCK Group Limited | Real estate | 2023 |
| KCL Design Ltd | Construction | 2019 |
| KCL Foods Limited | Other services | 2025 |
| KCN Capital Ltd | Real estate | 2026 |
| KD Basi Ltd | Real estate | 2024 |
| KD London Limited | Administrative & support | 2016 |
| KD Shah Limited | Health & social care | 2026 |
| KD Tronics Ltd | Wholesale & retail | 2024 |
| KDB Logic Ltd | Information & communication | 2023 |
| KDL Gjana Builders Ltd | Construction | 2023 |
| KDN Construction Ltd | Construction | 2015 |
| KDN Investments Ltd | Real estate | 2015 |
| Kdnk Ltd | Real estate | 2024 |
| Kdot Software Ltd | Information & communication | 2019 |
| KDR Global Limited | Real estate | 2019 |
| Kdreim Ltd | Real estate | 2019 |
| KDT FIX Ltd | Construction | 2018 |
| KDT Resources Limited | Construction | 2006 |
| Keane Waterloo Limited | Construction | 2012 |
| Kebab Express Limited | Hospitality | 2024 |
| Kebana Kebabesh Limited | Hospitality | 2017 |
| Kebhouze Ltd | Hospitality | 2023 |
| Kedhar Ltd | Administrative & support | 2025 |
| Kedlestone Limited | Other services | 1998 |
| Keech Estate Holdings Ltd | Real estate | 2025 |
| Keech Retail Limited | Wholesale & retail | 2023 |
| Keenlink Limited | Wholesale & retail | 1997 |