| Khan’S Garage Ltd | Wholesale & retail | 2025 |
| Khan’S Management Ltd | Professional & scientific | 2026 |
| Khan’S Supply Ltd | Wholesale & retail | 2025 |
| Khatuns Limited | Households | 2020 |
| Khaugulli Ltd | Hospitality | 2025 |
| Khazaana Limited | Wholesale & retail | 2023 |
| Khazi Investments Limited | Real estate | 2025 |
| Khce Limited | Construction | 2023 |
| Khella Properties Limited | Real estate | 2024 |
| Khiani & Co Limited | Wholesale & retail | 2012 |
| KHL Enterprises Ltd | Wholesale & retail | 2022 |
| KHM Education Ltd | Professional & scientific | 2008 |
| KHM Global Ltd | Administrative & support | 2026 |
| KHM Preparatory Schools Management Ltd | Education | 2010 |
| Khuda Baksh Creations Ltd | Wholesale & retail | 2022 |
| Khusakisamata Estates Limited | Real estate | 2022 |
| KIA Piri Ltd | Administrative & support | 2025 |
| Kian-E Consultancy Ltd | Education | 2023 |
| Kiana Rose Ltd | Construction | 2025 |
| Kiani Consultancy Ltd | Administrative & support | 2014 |
| Kiani Sons Ltd | Transport & logistics | 2023 |
| Kibabu Consultant Records Ltd | Other services | 2026 |
| Kibs Properties Ltd | Real estate | 2025 |
| KIC Logistics Ltd | Transport & logistics | 2019 |
| Kiddies Kingdom (AC) Ltd | Health & social care | 2023 |
| Kiddies Kingdom (MR) Ltd | Health & social care | 2017 |
| KIDKITS123 Ltd | Wholesale & retail | 2024 |
| Kidza Solutions Limited | Health & social care | 2023 |
| Kifgo Limited | Professional & scientific | 2011 |
| Kika Roofing Ltd | Construction | 2026 |
| Kiko Services Limited | Other services | 2019 |
| Killstzy Ltd | Transport & logistics | 2025 |
| Kilnford Digital Limited | Professional & scientific | 2025 |
| Kimberley Miller Property Refurbishment Ltd | Real estate | 2024 |
| Kimberly Young Healthcare Limited | Administrative & support | 2024 |
| Kimberly Young Limited | Health & social care | 2018 |
| Kimpton Pizza Ltd | Hospitality | 2025 |
| Kimrich Ltd | Other services | 2025 |
| Kimrichltd Ltd | Other services | 2025 |
| Kinara Mangement Limited | Professional & scientific | 2026 |
| Kinder Stars Ltd | Health & social care | 2026 |
| Kindomleadership Chosenones Limited | Manufacturing | 2025 |
| Kinergy Solutions Ltd | Construction | 2025 |
| Kinetic Engine Ltd | Information & communication | 2024 |
| Kinetik Building Services Limited | Construction | 2010 |
| King Edwards Ltd | Real estate | 2023 |
| King Street Companies Limited | Administrative & support | 1997 |
| King's House Moorlands Limited | Education | 2023 |
| Kingcraft Limited | Wholesale & retail | 1999 |
| Kingdom Culture Ministries Intl | Administrative & support | 2025 |
| Kingdom Quarters Ltd | Real estate | 2026 |
| Kingham Way Flats Management Company Limited | Households | 2021 |
| Kingham Way Limited | Real estate | 2014 |
| Kinghton Optom Limited | Health & social care | 2022 |
| Kings Arms Limited | Hospitality | 2009 |
| Kings Kids Day Nursery Ltd | Education | 2018 |
| Kingsbury Homes (Harpenden) Limited | Construction | 1978 |
| Kingsbury Mews Limited | Households | 2007 |
| Kingsburyhomesedlesborough Ltd | Real estate | 2023 |
| Kingsman Developments Ltd | Other services | 2020 |
| Kingston Valeting Centre Ltd | Extraterritorial | 2015 |
| Kingstone Property Solutions Ltd | Administrative & support | 2024 |
| Kingsway Karahi Ltd | Hospitality | 2022 |
| Kingsway Laundrette Ltd | Other services | 2020 |
| Kingswell Construction Services Ltd | Construction | 2025 |
| Kingswood Court RTM Company Limited | Households | 2021 |
| Kinship Logistics Limited | Transport & logistics | 2015 |
| Kinza Beauty Ltd | Other services | 2016 |
| KIP Mcgrath Education Centre (Luton) Ltd | Education | 2004 |
| Kiran Capital Advisors Limited | Professional & scientific | 2018 |
| Kirkby Paving Limited | Construction | 2014 |
| Kirkby Rentals Ltd | Real estate | 2025 |
| Kirkgate Curry House Limited | Hospitality | 2023 |
| Kirkland Digital Consulting Ltd | Administrative & support | 2017 |
| Kirkwood Solutions Ltd | Real estate | 2023 |
| Kirran Pharm Ltd | Health & social care | 2023 |
| Kirti Singh PVT Ltd | Real estate | 2012 |
| KIS Active Limited | Manufacturing | 2025 |
| Kism Properties Ltd | Construction | 2025 |
| Kiss Accountancy Services Ltd | Professional & scientific | 2025 |
| Kiswa Travels & Tours Limited | Administrative & support | 2023 |
| Kiswa Travels Ltd | Administrative & support | 2023 |
| Kitchen Social Limited | Hospitality | 2018 |
| Kitchen Tiles and Bathrooms UK Limited | Construction | 2017 |
| Kitchenware Ltd | Wholesale & retail | 2020 |
| Kitscout Ltd | Information & communication | 2025 |
| Kitten Crew Ltd | Health & social care | 2025 |
| Kittys Kosmetics Limited | Health & social care | 2024 |
| Kiwi Properties Ltd | Real estate | 2020 |
| Kiyaam Ltd | Wholesale & retail | 2024 |
| KIZ LDN Ltd | Arts & recreation | 2020 |
| KJ Contracting Ltd | Construction | 2025 |
| Kjuk Ltd | Wholesale & retail | 2019 |
| KK Aesthetics & Beauty Ltd | Other services | 2025 |
| KK Consultancy Services Limited | Professional & scientific | 2021 |
| KK Films Limited | Information & communication | 2023 |
| KK Property Services Limited | Real estate | 2020 |
| KK Tyres & Auto Service Limited | Wholesale & retail | 2024 |
| KK9RECRUITMENT Ltd | Administrative & support | 2024 |
| Kkaa Ltd | Professional & scientific | 2023 |