| Kensart Solutions Limited | Health & social care | 2013 |
| Kensington & Chelsea Investments LLP | | 2008 |
| Kensington & Chelsea Management Limited | Real estate | 1983 |
| Kensington Developments (London) Ltd | Extraterritorial | 2015 |
| Kensington Hotels Ltd. | Administrative & support | 2018 |
| Kensington Jewels Ltd | Manufacturing | 2025 |
| Kensington Real Estate and Asset Management Limited | Real estate | 2022 |
| Kent Auto Specialists Ltd | Wholesale & retail | 2019 |
| Kent County Healthcare Ltd | Wholesale & retail | 2025 |
| Kent Surrey Group Holdings Ltd | Financial services | 2021 |
| Kenth Limited | Wholesale & retail | 2025 |
| Kenton Cafe Ltd | Hospitality | 2024 |
| Kenton Club (Middlesex) Limited | Arts & recreation | 1960 |
| Kenton Estate Agents Limited | Financial services | 2014 |
| Kenton Events Ltd | Other services | 2014 |
| Kenton Gadgets Ltd | Wholesale & retail | 2026 |
| Kenton House Ltd. | Real estate | 2015 |
| Kenton Nominees Limited | Professional & scientific | 1986 |
| Kenton Photographic Colour Laboratories Limited | Professional & scientific | 1981 |
| Kenton Pizza Ltd | Hospitality | 2026 |
| Kenton Rights Limited | Information & communication | 2019 |
| Kenton Road Freehold Limited | Real estate | 2025 |
| Kenton Road Investments Limited | Real estate | 2016 |
| Kenton Road Management Company Limited | Households | 1993 |
| Kenton Road Properties Limited | Households | 2009 |
| Kenton Solicitors Ltd | Professional & scientific | 2023 |
| Kenton Spicy Ltd | Hospitality | 2024 |
| Kenton Takeaway Ltd | Hospitality | 2026 |
| Kenton Thai Therapy Ltd | Other services | 2024 |
| Kenton Tyre Services Ltd | Transport & logistics | 2013 |
| Kentonite Limited | Information & communication | 2024 |
| Kentor Limited | Real estate | 2014 |
| Kenvic Associates Limited | Real estate | 2025 |
| Kenwell Investments LLP | | 2008 |
| Kenworth Development Ltd | Construction | 2014 |
| Kenworth Liverpool Investments Limited | Construction | 2016 |
| Kenworth Nottingham Investments Limited | Construction | 2015 |
| Kenworth Student Living Limited | Construction | 2016 |
| Keny Healthcare Services Ltd | Health & social care | 2019 |
| Kenzer Ltd | Professional & scientific | 2018 |
| Kenzer Taxation Services Ltd | Professional & scientific | 2023 |
| Kerai Consultants Ltd | Construction | 2017 |
| Kerai Family Properties LLP | | 2024 |
| Kerai Management Limited | Real estate | 2017 |
| Kerai Properties (London) Limited | Real estate | 2020 |
| Kerai Property Investements Ltd | Real estate | 2025 |
| Kerais Propertys Limited | Real estate | 2025 |
| Keranova Ltd | Hospitality | 2026 |
| Kerbys Garage Limited | Wholesale & retail | 2007 |
| Kermali Ltd | Professional & scientific | 2012 |
| Kernel Homes Ltd | Real estate | 2021 |
| Kerpac Property Ltd | Real estate | 2025 |
| Kerry Secretarial Services Limited | Professional & scientific | 1997 |
| Kerry TOA Limited | Administrative & support | 2019 |
| Kershaw Music Limited | Wholesale & retail | 2007 |
| Kerville Associates Limited | Real estate | 2004 |
| Kesari Sky Ltd | Administrative & support | 2026 |
| Kesaria & Co. Ltd | Professional & scientific | 2021 |
| Kesarinandan Solutions Private Limited | Other services | 2023 |
| Kesh Beauty Ltd | Other services | 2025 |
| Kesh Investments Limited | Construction | 2016 |
| Kesha Tutorials Limited | Information & communication | 2013 |
| Keshav Commercial Ltd | Real estate | 2023 |
| Keshav T&C Ltd | Construction | 2025 |
| Keshava Harrow Ltd | Real estate | 2019 |
| Keshava Residential London LLP | | 2017 |
| Keshava Residential Ltd. | Construction | 2016 |
| Keshavevents Ltd | Hospitality | 2026 |
| Keshavkrupa Limited | Real estate | 2026 |
| Keshuashu Ltd | Information & communication | 2016 |
| Keshulife Ltd | Wholesale & retail | 2025 |
| Kesima Limited | Construction | 2017 |
| Kesla Assets Ltd | Real estate | 2020 |
| Kestral Homes Limited | Real estate | 1998 |
| Kestrol International Limited | Wholesale & retail | 2005 |
| Kethees Food Ltd | Hospitality | 2019 |
| Ketraj Wembley Limited | Hospitality | 2026 |
| Ketson Limited | Hospitality | 2011 |
| Kettering Fast Food Ltd | Hospitality | 2024 |
| Keuse Limited | Wholesale & retail | 2020 |
| Keva Construction Ltd | Construction | 2026 |
| Keveli Ltd | Construction | 2026 |
| Kevin Huynh Ltd | Professional & scientific | 2019 |
| Kevin Pietersen Global Cricket Academy Ltd | Education | 2019 |
| Kevin Sherratt Limited | Professional & scientific | 2001 |
| Kevin Smith Consulting Limited | Professional & scientific | 2011 |
| KEW Team Ltd | Professional & scientific | 2017 |
| Kewal Consulting Ltd | Professional & scientific | 2025 |
| Kewal Properties Ltd | Real estate | 2024 |
| Kewrious Ltd | Health & social care | 2026 |
| Kexent Limited | Wholesale & retail | 2025 |
| Key Capital Consultancy Ltd | Other services | 2023 |
| Key Capital Ltd | Financial services | 2017 |
| Key Choice Ltd | Administrative & support | 2023 |
| Key Connections Limited | Manufacturing | 2021 |
| Key Corporation Limited | Professional & scientific | 2009 |
| Key House Properties (East Anglia) Limited | Real estate | 2000 |
| Key House Properties Limited | Extraterritorial | 2008 |
| Key Ledgers Advisory Limited | Professional & scientific | 2015 |
| Key Ledgers Forensic Accountants Limited | Professional & scientific | 2012 |