| Khan Law Consulting Limited | Other services | 2011 |
| Khan Management Group Limited | Real estate | 2018 |
| Kher Solicitors Limited | Professional & scientific | 2011 |
| Khian Limited | Other services | 2014 |
| KIC Construction Limited | Extraterritorial | 2018 |
| Kiddross Ltd. | Arts & recreation | 2004 |
| Kids Club Community Ltd. | Other services | 2017 |
| Kidsafe Tech Ltd | Information & communication | 2026 |
| Kieron Conway Nitrogen Services Ltd | Professional & scientific | 2017 |
| Kieron Robert Services Limited | Wholesale & retail | 2014 |
| Kievie Logistics Limited | Administrative & support | 2013 |
| Kiistone Ltd | Administrative & support | 2018 |
| Kilo Aviation Limited | Transport & logistics | 2001 |
| KIM Hunter Ltd | Other services | 2026 |
| KIM Medical Consulting Limited | Health & social care | 2019 |
| KIN Hospitality Ltd | Hospitality | 2025 |
| Kind Minds Ltd | Health & social care | 2019 |
| Kinder Property Limited | Professional & scientific | 1996 |
| Kinetic Motorsport Limited | Arts & recreation | 2021 |
| KINGBROWN2019 Ltd | Manufacturing | 2019 |
| Kingfisher Management and Construction Ltd | Information & communication | 2023 |
| Kings Head (WYE) Ltd | Hospitality | 2020 |
| Kingsley Asset Finance Limited | Financial services | 2000 |
| Kingsley Finance Limited | Financial services | 1993 |
| Kingsley Investments Limited | Real estate | 2000 |
| Kingsley Residential Limited | Real estate | 2000 |
| Kingston Homes NW Ltd | Real estate | 2023 |
| Kingswood Court (Chorley) Management Company Limited | Households | 2003 |
| Kingswood Protection Global Ltd | Administrative & support | 2016 |
| Kirk & Ward Kitchens & Bathrooms Limited | Wholesale & retail | 2010 |
| Kirkby Stringer Ltd | Wholesale & retail | 2022 |
| Kirkman Baines Operations Ltd | Professional & scientific | 2018 |
| Kirkwood Interiors Limited | Manufacturing | 2021 |
| Kirtech IT Solutions Ltd | Information & communication | 2016 |
| Kishan (Bolton) Ltd | Real estate | 2016 |
| Kiss Care Limited | Health & social care | 2022 |
| Kiss Medical Limited | Professional & scientific | 2015 |
| Kiss My Botox Ltd | Other services | 2024 |
| Kitchens and Bedrooms by Alexander Scott Ltd | Administrative & support | 2017 |
| Kitty Melrose Limited | Information & communication | 2004 |
| Kiyaan M Ltd | Wholesale & retail | 2024 |
| KJ Clayton Civils Ltd | Administrative & support | 2021 |
| KJ Hairdressing Ltd | Other services | 2022 |
| KJA Realty Ltd | Real estate | 2022 |
| KJJ Physio Ltd | Other services | 2021 |
| KJK Haulage Ltd | Transport & logistics | 2018 |
| KJM Trade Limited | Wholesale & retail | 2006 |
| KJT Assembly Company Limited | Manufacturing | 2007 |
| Klarheit Aluminium Windows & Doors Limited | Construction | 2016 |
| Klass Commercial Ltd | Construction | 2026 |
| KLP Commercial Solutions Limited | Professional & scientific | 2016 |
| KM Counsultant Limited | Professional & scientific | 2014 |
| KM Digital Solutions Ltd | Information & communication | 2023 |
| KMB B&B Ltd | Hospitality | 2021 |
| KMB Bars Ltd | Hospitality | 2021 |
| KMJ Logistics Ltd | Transport & logistics | 2020 |
| KMN Holdings Ltd | Financial services | 2025 |
| KMN63 Ltd | Financial services | 2025 |
| Kmpk Wealth Management Limited | Financial services | 2016 |
| KMR Electrical Services Limited | Construction | 2003 |
| KMS Leisure Ltd | Arts & recreation | 2020 |
| Knight Engineering Services Limited | Professional & scientific | 2000 |
| Knightsbridge Central (12) Limited | Real estate | 2014 |
| Knightsbridge Central (7) Limited | Real estate | 2010 |
| Knightsbridge Planning Limited | Professional & scientific | 2021 |
| Knole Building and Construction Ltd | Construction | 2018 |
| Knoll House Developments Limited | Real estate | 2017 |
| Knoss Ltd | Wholesale & retail | 2019 |
| Knowles Farm Doggie Day Care & Pet Supplies Limited | Other services | 2026 |
| Kobo Cafe Ltd | Hospitality | 2016 |
| KOI Aqua Limited | Wholesale & retail | 2010 |
| Kole Events Ltd | Other services | 2022 |
| Kollypops Limited | Construction | 2019 |
| Kongs NQ Limited | Hospitality | 2023 |
| Korg Investments Ltd | Real estate | 2025 |
| KOS Architects Ltd | Professional & scientific | 2020 |
| KP Conveyor Services Limited | Manufacturing | 2010 |
| KP Europe Ltd | Wholesale & retail | 2023 |
| KP Utility Services Limited | Construction | 2017 |
| KPB Logistics Ltd | Transport & logistics | 2011 |
| Kplc Limited | Real estate | 2020 |
| KR Public Relations Limited | Professional & scientific | 2009 |
| KR Trading (NW) Limited | Administrative & support | 2024 |
| Krakenture Limited | Professional & scientific | 2023 |
| Krath Transport Ltd | Transport & logistics | 2025 |
| Krede Ltd | Administrative & support | 2011 |
| Kris Snape Plumbing & Heating Ltd | Construction | 2016 |
| KRT Legal Services Limited | Professional & scientific | 2020 |
| KS Restaurant Ltd | Hospitality | 2019 |
| KSA Camps Ltd | Arts & recreation | 2015 |
| Ksdt Holdings Ltd | Health & social care | 2026 |
| KT Abodes Limited | Real estate | 2026 |
| Kuchen Kitchens Ltd | Wholesale & retail | 2020 |
| KVV Haulage Ltd | Transport & logistics | 2018 |
| KW Designed Solutions Ltd | Manufacturing | 2004 |
| KW Group (Chorley) Limited | Financial services | 2018 |
| KW Pressure Testing Ltd | Professional & scientific | 2018 |
| KW Therapy Limited | Health & social care | 2011 |
| KW Therapy Solutions Limited | Health & social care | 2012 |
| Kwakker Transport Solutions Limited | Transport & logistics | 2005 |