| Kids Love Nature (Wickham) Ltd | Education | 2010 |
| Kids Love Nature Ltd | Education | 2009 |
| Kier Solutions Ltd. | Information & communication | 2013 |
| Kifer Ltd | Wholesale & retail | 2025 |
| Kiiyas Limited | Hospitality | 2026 |
| Kika Services Limited | Health & social care | 2024 |
| Killock (Martello Park) Freeholders Limited | Households | 2006 |
| Kilt Experts Ltd | Wholesale & retail | 2025 |
| KIM French Fitness Limited | Arts & recreation | 2020 |
| Kimberstone Properties Ltd | Construction | 2021 |
| Kimco Alliance Partners Limited | Professional & scientific | 2016 |
| Kindful Creative Ltd | Information & communication | 2021 |
| Kindred Design Limited | Professional & scientific | 2017 |
| Kindred Labs Limited | Extraterritorial | 2017 |
| Kindred Life Limited | Extraterritorial | 2017 |
| Kindredform Limited | Professional & scientific | 2010 |
| Kinet Ltd | Information & communication | 2025 |
| Kinetic Programmes Ltd | Information & communication | 2026 |
| Kingfisher Park Management Limited | Households | 2013 |
| Kingpin Products Limited | Manufacturing | 2009 |
| Kings Court (Branksome) Management Company Limited | Real estate | 2008 |
| Kingsbridge Holdings Limited | Financial services | 2023 |
| Kingsbridge Management Company (Poole) Ltd | Households | 2019 |
| Kingsbridge Mews Management Limited | Real estate | 1995 |
| Kingsbury Scientific Limited | Information & communication | 2017 |
| Kingsman Construction Limited | Construction | 2006 |
| Kingsman Dorset Limited | Construction | 2011 |
| Kingsman Fleet Ltd | Construction | 2016 |
| Kingston Hill Trading Ltd | Wholesale & retail | 2025 |
| Kingston Property Management Limited | Real estate | 1993 |
| Kingstown Estates Limited | Real estate | 2005 |
| Kingswell Limited | Professional & scientific | 2023 |
| Kinraid's Contracting Services Ltd | Professional & scientific | 2008 |
| Kinson Builders & Property Maintenance Limited | Extraterritorial | 2016 |
| Kinson Hand Car Wash Limited | Wholesale & retail | 2017 |
| Kintique Ltd | Wholesale & retail | 2022 |
| Kios Holdings Limited | Financial services | 2026 |
| Kirian International Limited | Information & communication | 2016 |
| Kirki Transport Limited | Transport & logistics | 2018 |
| Kirolite Limited | Manufacturing | 2010 |
| Kiroseiz AF Ltd | Health & social care | 2025 |
| Kirren Contracts Ltd | Construction | 2015 |
| Kirsty Slater Ltd | Health & social care | 2016 |
| Kirton Mews Management Company Limited | Households | 2021 |
| Kishanr Brands Ltd | Wholesale & retail | 2024 |
| Kismet Services (UK) Ltd | Wholesale & retail | 2020 |
| Kiss Acton Ltd | Arts & recreation | 2023 |
| Kiss MK Ltd | Arts & recreation | 2023 |
| KIT Haven Ltd | Wholesale & retail | 2022 |
| KIT Poole Ltd | Hospitality | 2023 |
| Kitara IT Services Ltd | Information & communication | 2013 |
| Kitaro Limited | Real estate | 2019 |
| Kitchen 52 Ltd | Wholesale & retail | 2021 |
| Kitchen Gadgets Limited | Wholesale & retail | 2026 |
| Kitchen House Holdings Limited | Financial services | 2015 |
| Kitchen House Limited | Wholesale & retail | 2000 |
| Kitchen Ventilation Solutions Ltd | Construction | 2025 |
| Kite Kids Ltd | Wholesale & retail | 2007 |
| Kite Technical Services Ltd | Construction | 2026 |
| Kite-Cm Investments Ltd | Financial services | 2024 |
| Kitsch Please Ltd | Wholesale & retail | 2024 |
| Kitts Boutique Ltd | Wholesale & retail | 2009 |
| Kitty B Limited | Wholesale & retail | 2022 |
| Kittyrama Limited | Manufacturing | 2013 |
| Kiwi Flooring Limited | Construction | 2018 |
| KJ ARB Works Ltd | Administrative & support | 2019 |
| KJ Hair Ltd | Other services | 2017 |
| KJ Negocios Ltd | Wholesale & retail | 2025 |
| KJC Installations Ltd | Construction | 2015 |
| KJF Consultancy Limited | Other services | 2004 |
| Kjjl Services Limited | Information & communication | 2016 |
| KJK Property Ltd | Real estate | 2022 |
| KJM Care & Co Limited | Public administration | 2025 |
| Kjsna Consulting Ltd | Information & communication | 2020 |
| KK Kitchen Projects Ltd | Manufacturing | 2026 |
| KK Marine Projects Ltd | Manufacturing | 2023 |
| KL Wellbeing Ltd | Health & social care | 2020 |
| Klaatu Limited | Information & communication | 2010 |
| Klam Design Ltd | Professional & scientific | 2012 |
| Klass Care Limited | Health & social care | 2018 |
| KLC Capital Partners LLP | | 2025 |
| Klean Detailing Limited | Administrative & support | 2025 |
| KLF Developments Limited | Construction | 2013 |
| KLF Developments PW Limited | Construction | 2022 |
| KLF Developments Talbot Woods Limited | Real estate | 2022 |
| KLF Property Limited | Real estate | 2019 |
| KLN Solutions Ltd | Professional & scientific | 2017 |
| KLS Move Ltd | Transport & logistics | 2024 |
| KLT Digital Ltd | Information & communication | 2026 |
| Kluen Ltd | Wholesale & retail | 2020 |
| Kléosco Ltd | Wholesale & retail | 2024 |
| KM Vision Holding Ltd | Financial services | 2025 |
| Kmann Carpentry Ltd | Manufacturing | 2018 |
| KMB & Sons Ltd | Wholesale & retail | 2025 |
| Kmbm Projects Limited | Real estate | 2015 |
| Kmdg Ltd | Professional & scientific | 2013 |
| KN Medical Ltd | Extraterritorial | 2022 |
| KN Reader Properties Ltd | Real estate | 2025 |
| Kngsfbc Ltd | Wholesale & retail | 2025 |
| Knight George Holdings Limited | Financial services | 2024 |