| KAN Traders Limited | Real estate | 2023 |
| Kanak Systems Ltd | Information & communication | 2014 |
| Kanash Investments Ltd | Wholesale & retail | 2014 |
| Kanazawa Holding Ltd | Financial services | 2025 |
| Kandys Smoothie Ltd | Hospitality | 2019 |
| Kane Empires Property Lets Ltd | Real estate | 2021 |
| Kanesh Group Ltd | Wholesale & retail | 2026 |
| Kanew Properties Limited | Real estate | 2019 |
| Kang Holdings Ltd | Real estate | 2019 |
| Kangago Limited | Wholesale & retail | 2025 |
| Kaniz Home Limited | Real estate | 2025 |
| Kanmar Trading Limited | Administrative & support | 2010 |
| Kano Fitness Ltd | Education | 2026 |
| Kantilal & Sons Ltd | Information & communication | 2017 |
| Kanwar Mortgages & Finance Ltd | Financial services | 2018 |
| Kaouri Ltd | Information & communication | 2017 |
| Kapila and Kumar Limited | Health & social care | 2009 |
| Kapinga London Ltd | Wholesale & retail | 2023 |
| Kapoor Systems Limited | Information & communication | 1995 |
| Kappa Capital Limited | Professional & scientific | 2012 |
| Kappa Technologies Ltd | Professional & scientific | 2009 |
| KAR Takeaway Limited | Hospitality | 2025 |
| KAR Virtual Restaurant Limited | Hospitality | 2024 |
| Karagol Limited | Hospitality | 2013 |
| Karahihouse Limited | Hospitality | 2018 |
| Karak Chaa Ltd | Hospitality | 2025 |
| Kardamom Ltd | Wholesale & retail | 2023 |
| Kardos & Associates Ltd | Professional & scientific | 2022 |
| Kare Connect Limited | Health & social care | 2021 |
| Kare Professionals Services Ltd | Administrative & support | 2022 |
| Karenrob Limited | Health & social care | 2021 |
| Kargbo Logistics Limited | Transport & logistics | 2025 |
| Kargo Logistics Limited | Transport & logistics | 2025 |
| Kari's Corner Ltd | Health & social care | 2014 |
| Kariade Pillayar Store Limited | Wholesale & retail | 2005 |
| Karipra Limited | Administrative & support | 2020 |
| Karla's Kiddicare Limited | Health & social care | 2025 |
| Karolema Holdings Limited | Financial services | 2020 |
| Karongwe Limited | Agriculture & fishing | 2022 |
| Karts Homes Ltd | Real estate | 2020 |
| Karvas Inc Ltd | Information & communication | 2016 |
| KAS BNG Ltd | Real estate | 2025 |
| Kasa Conversions Limited | Construction | 2015 |
| Kasco Investments Ltd | Financial services | 2022 |
| Kash Group Holdings Limited | Financial services | 2020 |
| Kash Group Office Limited | Administrative & support | 2018 |
| Kash Group Properties Ltd | Real estate | 2005 |
| Kash PH Ltd | Hospitality | 1991 |
| Kashba Services Limited | Education | 2020 |
| Kashgroup Limited | Hospitality | 2015 |
| Kashgroup Trading Limited | Hospitality | 2014 |
| Kashi Enterprise Ltd | Information & communication | 2021 |
| Kashif Export Company (International) Ltd | Professional & scientific | 1997 |
| Kaska Trading Ltd | Wholesale & retail | 2021 |
| Kassala Services Limited | Professional & scientific | 1982 |
| Kastagreen Ltd | Wholesale & retail | 2018 |
| Kataa Limited | Administrative & support | 2019 |
| Katalinu Ltd | Transport & logistics | 2016 |
| Katarzyna Karnas Limited | Manufacturing | 2025 |
| Katherine Pate Ltd | Information & communication | 2014 |
| Katherinesdelights Limited | Hospitality | 2025 |
| Kathir Systems Limited | Information & communication | 2024 |
| Kathmandu Collections Ltd | Wholesale & retail | 2024 |
| Katie LOU Enterprises Ltd | Real estate | 2018 |
| Katie LOU Properties Ltd | Real estate | 2024 |
| Katns Ltd | Information & communication | 2020 |
| Katomon Ltd | Households | 2020 |
| Katrina D'Austin Consulting Ltd | Professional & scientific | 2025 |
| Katy Cockerill Ltd | Professional & scientific | 2026 |
| Katy Jordan Freeman Ltd | Wholesale & retail | 2025 |
| Kaurageous Limited | Real estate | 2024 |
| Kaushik Construction & Transport Services Ltd | Construction | 2017 |
| Kaushik Financial Services Ltd | Professional & scientific | 2014 |
| Kaushik Properties Limited | Real estate | 2016 |
| Kaushik Property Management Limited | Real estate | 2023 |
| Kavancy Investments Limited | Real estate | 2017 |
| Kavancy Management Ltd | Extraterritorial | 2018 |
| Kavancy NHP Limited | Real estate | 2018 |
| Kaveri Consulting Ltd | Information & communication | 2023 |
| Kavnish Limited | Administrative & support | 2006 |
| Kavnishseronera LLP | | 2018 |
| Kawai UK Limited | Administrative & support | 1986 |
| Kayb Construction Ltd | Construction | 2026 |
| Kaycia Duncan Limited | Professional & scientific | 2025 |
| Kaycutz Ltd | Other services | 2026 |
| Kaylan Professionals Limited | Health & social care | 2018 |
| Kayleigh Farnworth Ltd | Households | 2025 |
| Kaymarose Ltd | Public administration | 2021 |
| Kayokem Agro-Construction Ltd | Construction | 2023 |
| Kayokem International Travels and Global Services Limited | Administrative & support | 2023 |
| Kayrue Ltd | Public administration | 2025 |
| Kayvan Seyri Ltd | Other services | 2019 |
| Kaz's Food Ltd | Hospitality | 2025 |
| Kaz's Kitchen Ltd | Hospitality | 2022 |
| Kaza Properties Ltd | Wholesale & retail | 2026 |
| Kazbard Ltd | Professional & scientific | 2025 |
| Kazper Restaurants Limited | Hospitality | 2002 |
| Kazzora Ltd | Other services | 2021 |
| KB Letting Ltd | Real estate | 2024 |
| KB Knewbridge Limited | Financial services | 2015 |