| KGC Property Management Ltd | Real estate | 2025 |
| Khadiman Services Ltd | Professional & scientific | 2014 |
| Khan Peri Peri MK Ltd | Hospitality | 2019 |
| Khandelwal Investments Ltd | Financial services | 2022 |
| Khandelwal Properties Ltd | Real estate | 2019 |
| Khandelwal Property & Consultants Limited | Real estate | 2021 |
| Khindas Retail Ltd | Wholesale & retail | 2017 |
| Khule Healthcare Ltd. | Administrative & support | 2016 |
| Khule Management and Finance UN Limited | Financial services | 2024 |
| Khushi's Properties Limited | Real estate | 2018 |
| Kiai Advisors Limited | Public administration | 2019 |
| Kiaona Limited | Real estate | 2025 |
| Kiara Salons Limited | Other services | 2024 |
| Kick the Klouds Ltd | Other services | 2018 |
| Kickstart Housing CIC | Hospitality | 2024 |
| Kidman Air Conditioning Ltd | Energy | 2026 |
| Kids Kargo Limited | Wholesale & retail | 1999 |
| Kiemera Corporate Finance Limited | Financial services | 2015 |
| Kieran O'Riordan Ltd | Construction | 2013 |
| KIG Group Limited | Real estate | 2026 |
| Kikiri.Co.Uk Ltd. | Information & communication | 2012 |
| Kilby Group Ltd | Wholesale & retail | 2018 |
| Kilic Homes Ltd | Real estate | 2025 |
| Kill Your Clone Ltd | Extraterritorial | 2024 |
| Kilroy PLC | Real estate | 1994 |
| KIM Consulting Ltd | Information & communication | 2018 |
| Kimanja Kenya Tea Ltd | Wholesale & retail | 2024 |
| Kimba Services Ltd | Administrative & support | 2025 |
| Kimbolton Catering Limited | Hospitality | 2015 |
| Kimbolton Court Residents Association Limited | Households | 1964 |
| Kimbolton Investment Group Limited | Real estate | 2025 |
| Kimbolton Services Ltd | Construction | 2025 |
| Kimimay Ltd | Health & social care | 2024 |
| Kimiti Consulting Ltd | Professional & scientific | 2018 |
| Kimm & Miller (Holdings) Ltd | Financial services | 2021 |
| Kimm & Miller (Online) Ltd | Wholesale & retail | 2022 |
| Kimm & Miller (UK) Ltd. | Administrative & support | 2006 |
| Kinaat Limited | Health & social care | 2018 |
| Kindale Properties Limited | Real estate | 1981 |
| Kindhome Healthcare Limited | Health & social care | 2025 |
| Kinetic Education Limited | Education | 2025 |
| Kinetic Gate Therapeutics Ltd | Professional & scientific | 2026 |
| Kinetic Sports Performance Limited | Arts & recreation | 2017 |
| King's Arms Trust (Bedford) | Other services | 2006 |
| Kingdom Builders Family | Other services | 2007 |
| Kingdom Group Commercial Ltd | Hospitality | 2021 |
| Kingdom Healthcare Services Ltd | Health & social care | 2013 |
| Kingdom Steel Ltd | Construction | 2018 |
| Kingfisher Chilli Company Ltd | Manufacturing | 2020 |
| Kingfisher Flooring Solutions Ltd | Construction | 2011 |
| Kings VAT Ltd | Professional & scientific | 2012 |
| Kings Windows Limited | Construction | 2008 |
| Kingsclere Advisory Ltd | Professional & scientific | 2020 |
| Kingsland Paper Limited | Extraterritorial | 1959 |
| Kingsley Knight Law Limited | Education | 2011 |
| Kingsley Knight Limited | Real estate | 2019 |
| Kingsmen Refurbs Ltd | Construction | 2018 |
| Kingston Gold Limited | Arts & recreation | 2004 |
| Kingston Park House Limited | Financial services | 2012 |
| Kingstream Ltd | Professional & scientific | 2021 |
| Kingsway Homes Investments Ltd | Real estate | 2021 |
| Kingsway Homes Ltd | Real estate | 2014 |
| Kinia Service Ltd | Wholesale & retail | 2026 |
| Kintuz Ltd | Health & social care | 2019 |
| Kiona Assistants Limited | Administrative & support | 2025 |
| KIP Solutions Ltd | Administrative & support | 2011 |
| Kipinat Limited | Mining & quarrying | 2023 |
| Kirkup Ireland Enterprises Ltd | Wholesale & retail | 2026 |
| Kise Consultancy Ltd | Professional & scientific | 2021 |
| Kissane Engineering Ltd | Professional & scientific | 2018 |
| KIT RAM Limited | Real estate | 2015 |
| Kitcher Consulting Limited | Professional & scientific | 2010 |
| Kitec Healthcare Services Limited | Health & social care | 2010 |
| Kitende Limited | Health & social care | 2025 |
| Kitesfield Limited | Real estate | 2020 |
| Kitty Chipanga Limited | Health & social care | 2013 |
| Kiwe Solutions Ltd | Other services | 2017 |
| Kiyash Retail Ltd | Wholesale & retail | 2024 |
| Kizzy Administration Limited | Extraterritorial | 2007 |
| Kizzy Investments Limited | Extraterritorial | 2007 |
| Kizzy Services Limited | Extraterritorial | 2007 |
| KJ Fundays Ltd | Arts & recreation | 2025 |
| KJB AS Ltd | Professional & scientific | 2026 |
| KJB Management Solutions Limited | Professional & scientific | 2003 |
| KJB Restaurant Consulting Limited | Hospitality | 2011 |
| Kjgroup Ltd | Financial services | 2024 |
| KJL Transport Limited | Transport & logistics | 2021 |
| Kkvkp Ltd | Real estate | 2025 |
| KL Walmsley Consultancy Ltd | Professional & scientific | 2022 |
| KLA Consulting Limited | Professional & scientific | 2023 |
| Klanzen Cleaning Limited | Administrative & support | 2024 |
| Klanzen Consulting Limited | Professional & scientific | 2022 |
| Klanzen Properties Limited | Real estate | 2024 |
| Klara Stanbridge Limited | Professional & scientific | 2016 |
| Kleen Angels Ltd | Administrative & support | 2025 |
| Kleiderhaus Ltd | Administrative & support | 2012 |
| KLG Bedford Properties Limited | Real estate | 2025 |
| Klik and Capture Ltd | Professional & scientific | 2022 |
| Klin Ltd | Wholesale & retail | 2019 |
| Klinique Limited | Administrative & support | 2018 |