| Kimchi Market Ltd | Hospitality | 2022 |
| Kims Pharma Ltd | Health & social care | 2015 |
| Kinberg Services LP | | 2017 |
| Kind House Cleaning Company Ltd | Administrative & support | 2026 |
| Kinder Castle Limited | Education | 2002 |
| Kindertec Limited | Administrative & support | 1994 |
| Kinderversity Limited | Education | 2016 |
| Kindred UK Probate Research Limited | Other services | 2014 |
| Kinectra Limited | Professional & scientific | 2026 |
| Kinetexx Sports Limited | Manufacturing | 2021 |
| Kinetic Engineering and Manufacturing Solutions Ltd | Administrative & support | 2007 |
| Kinetic Private Investments Limited | Professional & scientific | 2019 |
| Kinetics Developments Ltd | Construction | 2026 |
| Kinewell Energy Ltd | Information & communication | 2013 |
| King Cabbage Limited | Professional & scientific | 2024 |
| King of Sports Ltd | Arts & recreation | 2014 |
| Kingdom Construction Ltd | Construction | 2018 |
| Kings Catering North East Limited | Hospitality | 2015 |
| Kings Dock Mill (Liverpool) Management Company Limited | Real estate | 2010 |
| Kingsland House Ltd | Other services | 2024 |
| Kingsland Takeaway Ltd | Hospitality | 2011 |
| Kingsley Investments NE Limited | Real estate | 2025 |
| Kingsmere Finance Directors Limited | Professional & scientific | 2016 |
| Kingsmoor (Bowesfield Lane) Management Limited | Real estate | 2009 |
| Kingston Educational Investments Limited | Construction | 2019 |
| Kingston Food Group Ltd | Hospitality | 2025 |
| Kingston Law Limited | Administrative & support | 2016 |
| Kingston Online Pharma Ltd | Wholesale & retail | 2025 |
| Kingston Park Holdings Ltd | Financial services | 2025 |
| Kingston Park Motors Ltd | Wholesale & retail | 2024 |
| Kingston Pizza Limited | Real estate | 2014 |
| Kingston Property Services Limited | Households | 2000 |
| Kingstonian Travel Services Limited | Extraterritorial | 1998 |
| Kingswalk Dental Practice Limited | Health & social care | 2007 |
| Kingsway Cabs Ltd | Transport & logistics | 2019 |
| Kingsway House Tynemouth Limited | Households | 2021 |
| Kingsway Sunniside Limited | Wholesale & retail | 2010 |
| Kingswood Property Consultants Ltd | Real estate | 2016 |
| Kinnair and Company Limited | Professional & scientific | 1995 |
| Kinnair Associates Limited | Professional & scientific | 2021 |
| Kino Digital Design Limited | Information & communication | 2012 |
| Kinsmoh Limited | Real estate | 2025 |
| Kinz's Invest Capital Ltd | Real estate | 2025 |
| Kiora Limited | Wholesale & retail | 2025 |
| Kiosk Leisure Management Ltd | Hospitality | 2019 |
| Kiosk N1C Limited | Wholesale & retail | 2018 |
| KIP Mcgrath Newcastle North LLP | | 2024 |
| Kirbas Properties Ltd | Real estate | 2024 |
| Kirby Coding Ltd | Information & communication | 2025 |
| Kirbyscott Limited | Real estate | 2015 |
| Kirkbride Solutions Ltd | Information & communication | 2024 |
| Kirkharle Creative Limited | Households | 2007 |
| Kirkhill Fleming Limited | Real estate | 2002 |
| Kirkley Cycles Limited | Other services | 2010 |
| Kirkley Sawmill Properties Limited | Transport & logistics | 2019 |
| Kirkstyle Health and Education Limited | Education | 2012 |
| Kirkwhelpington & District Show Limited | Administrative & support | 2019 |
| Kirkwhelpington Developments Limited | Construction | 2019 |
| Kirlian Enterprises Ltd | Arts & recreation | 2025 |
| Kirsha Knowles Limited | Other services | 2023 |
| Kirsten Scott Limited | Financial services | 2009 |
| Kisancart Ltd | Wholesale & retail | 2024 |
| Kisen Labs Ltd | Professional & scientific | 2020 |
| Kisima Europe CIC | Other services | 2019 |
| Kiss My Whip Limited | Other services | 2016 |
| Kiss Restaurant Limited | Hospitality | 2024 |
| Kitani Medical Private Limited | Health & social care | 2016 |
| Kitchens & Bathrooms by Refurb Ltd | Manufacturing | 2017 |
| Kitchens 27 & Interiors Ltd | Construction | 2019 |
| Kitchens of Kerala Ltd | Hospitality | 2024 |
| Kitchies Ltd | Manufacturing | 2016 |
| Kitchis Kitchen Ltd | Hospitality | 2018 |
| Kits 4 ALL Limited | Wholesale & retail | 2009 |
| Kitsch & Disco Limited | Information & communication | 2024 |
| Kittiwakesconsulting Ltd | Health & social care | 2026 |
| Kittu Express Ltd | Administrative & support | 2019 |
| Kitty and Scarlet Limited | Professional & scientific | 2012 |
| Kiukiu Limited | Hospitality | 2018 |
| KJB Flooring Limited | Wholesale & retail | 2006 |
| KJB Residential Limited | Real estate | 2017 |
| KJC & S Project Services Limited | Professional & scientific | 2024 |
| KJD Sports Limited | Professional & scientific | 2023 |
| Kjgoodall Ltd | Construction | 2022 |
| KJP Recycling Ltd | Water & waste | 2024 |
| KJR Electrical Services Ltd | Construction | 2024 |
| KK Hair & Beauty NE Ltd | Wholesale & retail | 2019 |
| Kkcleans Cleaning Specalists Limited | Administrative & support | 2025 |
| Kkdv Ltd | Real estate | 2024 |
| Kksh Ltd | Hospitality | 2012 |
| KLA Medical Services Limited | Health & social care | 2016 |
| Klap Property Group Ltd | Real estate | 2023 |
| Kleancastle Cleaning Services Ltd | Administrative & support | 2024 |
| KLH Drylining Ltd | Construction | 2023 |
| Klienemeron Limited | Health & social care | 2025 |
| Klinikk Ltd | Other services | 2024 |
| KLN Turkish Barber Limited | Other services | 2025 |
| Kloepfer Holdings Ltd | Real estate | 2026 |
| Klova Limited | Information & communication | 2026 |
| KLR Planning Limited | Professional & scientific | 2014 |
| Klres Procurement Ltd | Professional & scientific | 2022 |