| Kiddies World Childcare Services Ltd | Administrative & support | 2026 |
| Kiddream Ltd | Professional & scientific | 2023 |
| Kidify Ltd | Health & social care | 2026 |
| Kids Heritage Ltd | Health & social care | 2021 |
| Kiing PT Ltd | Arts & recreation | 2018 |
| Kilbryde Property Services Ltd | Construction | 2024 |
| Killoughery Holdings Limited | Construction | 1997 |
| Killoughery Properties Limited | Real estate | 2004 |
| Kilobe Systems Ltd | Information & communication | 2015 |
| Kimani Core Ltd | Professional & scientific | 2024 |
| Kimber & Co Jewellery Ltd | Manufacturing | 2025 |
| Kimberley Residential Homes Limited | Health & social care | 1984 |
| Kimuse Limited | Real estate | 2017 |
| Kim’S Snack Bar Ltd | Hospitality | 2023 |
| Kindness Community CIC | Arts & recreation | 2020 |
| Kinfauns Road (Block L) Management Company Limited | Households | 1992 |
| King Concrete Holdings Ltd | Other services | 2014 |
| King David Nurseries Limited | Health & social care | 2012 |
| Kingdom Conscious Ltd | Wholesale & retail | 2021 |
| Kingdom Harvest Church Ltd | Other services | 2014 |
| Kingdom Heritage Model School | Education | 2013 |
| Kingdom Heritage Security Ltd | Professional & scientific | 2018 |
| Kingdom Rooted Limited | Professional & scientific | 2026 |
| Kingdomglobal Limited | Real estate | 2025 |
| Kingdoms Residential Ltd | Real estate | 2016 |
| Kingfisher Homes Limited | Construction | 2025 |
| Kings Drylining Ltd | Construction | 2014 |
| Kings Hill Windows & Doors Ltd | Extraterritorial | 2024 |
| Kingsgate Investment Properties Limited | Real estate | 2022 |
| Kingsgrove Electrical Limited | Construction | 2019 |
| Kingsmen Labour Recruitment Ltd | Administrative & support | 2023 |
| Kingsmere Homes Limited | Construction | 1998 |
| Kingspeed Services Limited | Wholesale & retail | 2010 |
| Kingspit Transport Limited | Water & waste | 2012 |
| Kingston Hospitality Ltd | Manufacturing | 2021 |
| Kinsella Group Ltd | Construction | 2021 |
| Kinsellis Services Ltd | Construction | 2020 |
| Kipling Cafe and Restaurant Ltd | Hospitality | 2024 |
| Kiral Estates Ltd | Real estate | 2026 |
| Kire Limited | Professional & scientific | 2022 |
| Kisitu & Co. CIC | Professional & scientific | 2025 |
| Kizment Services Limited | Wholesale & retail | 2019 |
| KJ Commercials Ltd | Wholesale & retail | 2019 |
| KJ Heating Ltd | Construction | 2026 |
| KJB Roofing Ltd | Construction | 2022 |
| KJG Consulting Ltd | Information & communication | 2019 |
| KJP Facilities Ltd | Construction | 2022 |
| KK Jewellery Collection Ltd | Manufacturing | 2021 |
| KKH Vehicle Hire Ltd | Administrative & support | 2013 |
| KKK Trading Ltd | Wholesale & retail | 2023 |
| Kktax Accountancy Limited | Professional & scientific | 2020 |
| Kkvp Consultancy Limited | Professional & scientific | 2026 |
| KL Electrical Installations Limited | Construction | 2013 |
| KLB Holdings Ltd | Financial services | 2023 |
| Klinmost Concept Limited | Wholesale & retail | 2012 |
| Klokskap Limited | Professional & scientific | 2021 |
| Klynk Naturals Ltd | Manufacturing | 2026 |
| Kman Limited | Information & communication | 2021 |
| Kmdsp Property Development Limited | Real estate | 2016 |
| Kmgm Hospitality Ltd | Hospitality | 2026 |
| KMK Kadre Ltd | Administrative & support | 2019 |
| KMR Properties (London) Limited | Real estate | 2023 |
| KMW Electrics Ltd. | Construction | 2016 |
| KMX Property Ltd | Real estate | 2024 |
| Knal Care Ltd | Health & social care | 2024 |
| Kndriver Ltd | Construction | 2016 |
| Kng-Equity Group Ltd | Professional & scientific | 2023 |
| Knickytas Consulting Ltd | Financial services | 2012 |
| Knight Brothers (UK) Limited | Construction | 2010 |
| Knight Data Solutions Ltd | Information & communication | 2018 |
| Knight Farrant Limited | Arts & recreation | 2023 |
| Knights Electrical Ltd | Construction | 2018 |
| Knightswood Contractors Ltd | Construction | 2025 |
| Knole Financial Services Ltd | Administrative & support | 2008 |
| Koala Moon Pre-Schools Ltd | Education | 2024 |
| Koala Real Estate Limited | Real estate | 2004 |
| Koala Studio Ltd | Manufacturing | 2025 |
| Kobiani Trading Company Limited | Health & social care | 2014 |
| Kodji Estates Ltd | Real estate | 2026 |
| Kody Construction Limited | Construction | 2023 |
| Kofab Global Services Limited | Manufacturing | 2023 |
| Koiranen Grand Prix Ltd | Professional & scientific | 2015 |
| Kolopin Limited | Professional & scientific | 2016 |
| Komnh Properties Ltd | Real estate | 2021 |
| Kon-Trans Ltd | Transport & logistics | 2013 |
| Konarp Investments Limited | Real estate | 2023 |
| Kookerella Ltd | Information & communication | 2020 |
| Kornerstone Creative Limited | Information & communication | 2014 |
| Kospeed Management Ltd | Administrative & support | 2013 |
| Kosta Gardening Ltd | Construction | 2023 |
| Kostih Group Ltd | Construction | 2021 |
| Kota Services Limited | Other services | 2025 |
| KPL Building Services Limited | Construction | 2013 |
| Kprime Healthcare Ltd | Health & social care | 2026 |
| KPT Solutions Limited | Wholesale & retail | 1994 |
| Kras Education Ltd | Education | 2022 |
| Krate Distributed Information Systems UK Ltd | Other services | 2019 |
| Kratos D818 Ltd | Health & social care | 2023 |
| Kresso Homeless Service Ltd | Transport & logistics | 2025 |
| KRI8 Ltd | Professional & scientific | 2026 |