| Kingsley Heritage Limited | Real estate | 2016 |
| Kingsley House Management Company Limited | Households | 2002 |
| Kingsley Investments Holdings Limited | Real estate | 2023 |
| Kingsley Symes Consulting Ltd | Administrative & support | 2016 |
| Kingsmead Land and Homes Ltd | Real estate | 2025 |
| Kingsmen Commercial Ltd. | Real estate | 2016 |
| Kingsmen Residential House Ltd | Real estate | 2021 |
| Kingsmen Residential Ltd | Real estate | 2019 |
| Kingsq PO & Stores Ltd | Wholesale & retail | 2016 |
| Kingsrock Advisors UK Limited | Financial services | 2023 |
| Kingsrock Global Investment Partners Limited | Financial services | 2024 |
| Kingstar Consultants Limited | Professional & scientific | 2022 |
| Kingstead Homes Ltd | Real estate | 2024 |
| Kingstead Hotels Ltd | Real estate | 2025 |
| Kingstead Legals Ltd | Professional & scientific | 2026 |
| Kingsthorpe Homes Limited | Construction | 1983 |
| Kingston (March) Ltd | Real estate | 2019 |
| Kingston Fire and Electrical Ltd | Construction | 2009 |
| Kingston Group Limited | Financial services | 2019 |
| Kingston Landmark LLP | | 2021 |
| Kingston Landmark Lodge Limited | Real estate | 2021 |
| Kingston Point Ltd | Construction | 2019 |
| Kingston Sky LLP | | 2019 |
| Kingston Telecom Solutions Ltd | Information & communication | 2011 |
| Kingston West Ltd | Real estate | 2024 |
| Kingstreet Group Limited | Real estate | 2015 |
| Kingstreet Limited | Real estate | 2021 |
| Kingstreet Mayfair Limited | Real estate | 2020 |
| Kingsville Limited | Real estate | 1980 |
| Kingswood Place Management Company (Edenbridge) Limited | Real estate | 2004 |
| Kings’ Oak New York 2 Ltd | Real estate | 2025 |
| Kini Properties Limited | Real estate | 2026 |
| Kinley Construction Services Ltd | Construction | 2023 |
| Kinnairn Limited | Professional & scientific | 2009 |
| Kinsley Premier Limited | Wholesale & retail | 2022 |
| Kinson Road Limited | Health & social care | 2023 |
| Kintop Films Rights Limited | Information & communication | 2025 |
| Kiota Limited | Hospitality | 2013 |
| KIP Enterprise PVT Ltd | Wholesale & retail | 2025 |
| Kipling Court (Tennyson Road) Management Company Limited | Households | 1990 |
| Kira Consultancy Limited | Professional & scientific | 2011 |
| Kiran Foundation | Public administration | 2021 |
| Kiran Govind Tuition Ltd | Education | 2025 |
| Kiran Investments Limited | Hospitality | 2006 |
| Kiran Wholesalers Limited | Wholesale & retail | 2020 |
| Kirasa International Limited | Hospitality | 2016 |
| Kirat Investments Ltd | Real estate | 2024 |
| Kiris Developments Limited | Real estate | 2022 |
| Kiris Security Installations Limited | Administrative & support | 2026 |
| Kiritharans Property LLP | | 2021 |
| Kirkgate Properties Limited | Real estate | 2014 |
| Kirkos Limited | Wholesale & retail | 2022 |
| Kirks ML Limited | Construction | 2022 |
| Kirks ML Properties Limited | Hospitality | 2026 |
| Kiromitza Limited | Construction | 2015 |
| Kiros Partners Limited | Information & communication | 2025 |
| Kirsop of Milton Keynes Health & Safety Management Ltd | Administrative & support | 2017 |
| Kirstdan Limited | Real estate | 2018 |
| Kirti Construction Limited | Construction | 2014 |
| Kiru MED Limited | Health & social care | 2023 |
| KIS Accountants and Book-Keepers Limited | Professional & scientific | 2016 |
| Kish Yogan Ltd | Health & social care | 2023 |
| Kishan Limited | Professional & scientific | 2016 |
| Kishani Enterprises Ltd | Professional & scientific | 2025 |
| Kishen Investments Limited | Real estate | 2025 |
| Kishen Properties Limited | Real estate | 2025 |
| Kishu Limited | Wholesale & retail | 2025 |
| Kismet Konnections Limited | Wholesale & retail | 2016 |
| Kismet Property Group Ltd | Real estate | 2023 |
| Kiso Express Limited | Wholesale & retail | 2022 |
| Kissin Teef Ltd | Other services | 2024 |
| Kitchen Contracts Ltd | Manufacturing | 2004 |
| Kitchen Elements Ltd | Wholesale & retail | 2019 |
| Kitchen Radio Limited | Information & communication | 2020 |
| Kitchen Space Studio Ltd | Manufacturing | 2013 |
| Kitchener House (West Drayton) Management Company Limited | Households | 2015 |
| Kitchens With Tracey Limited | Wholesale & retail | 2022 |
| Kite Capital Ltd | Financial services | 2026 |
| Kiya Medical Ltd | Health & social care | 2018 |
| Kiyanshi Group Ltd | Wholesale & retail | 2022 |
| Kiyi Limited | Transport & logistics | 2016 |
| Kiyt Limited | Hospitality | 2019 |
| Kizi Solutions Limited | Administrative & support | 2007 |
| KJ IT Service Limited | Information & communication | 2025 |
| KJ Luxe Developments Limited | Real estate | 2019 |
| KJD Bookkeeping & Tax Solutions Limited | Professional & scientific | 2021 |
| Kjdms (Harrow) Limited | Real estate | 2012 |
| Kjdms (Kingsbury) Limited | Real estate | 2017 |
| KJF Properties Limited | Other services | 2005 |
| KJK Legal Accounting Ltd | Professional & scientific | 2022 |
| KJM Health & Safety Services Limited | Professional & scientific | 2020 |
| KJP Group Ltd | Extraterritorial | 2023 |
| KJP Information Solutions Ltd | Information & communication | 2014 |
| KJP Mossop Ltd | Real estate | 2016 |
| KJS Costello Limited | Information & communication | 2021 |
| Kjvc Properties (Holdings) Limited | Financial services | 2023 |
| Kjvc Properties Limited | Real estate | 2019 |
| KJW Limited | Information & communication | 2015 |
| KK & SV Limited | Hospitality | 2013 |
| KK 070921 Ltd | Real estate | 2021 |