| KD7 Group Ltd | Administrative & support | 2018 |
| Kdhan Limited | Professional & scientific | 2025 |
| KDP Green Limited | Construction | 2026 |
| KDS Nandha Limited | Construction | 2024 |
| Ke-Tec Limited | Construction | 2008 |
| Kebabish Original Southall Ltd | Administrative & support | 2019 |
| KEE2VEE Ltd | Wholesale & retail | 2021 |
| Keep Your Ride Ltd | Transport & logistics | 2022 |
| Keerthi Jewellers & Workshop Ltd | Manufacturing | 2018 |
| KEL Group Ltd | Construction | 2017 |
| KEM Chho Publishing Ltd | Information & communication | 2026 |
| Kemy Construction Ltd | Construction | 2026 |
| Kenfield Partners Limited | Real estate | 2020 |
| Kengram Ltd | Information & communication | 2025 |
| Kenix Estates Ltd | Real estate | 2016 |
| Kennet Bazaar Ltd | Wholesale & retail | 2025 |
| Kennet Island Estate Ltd | Real estate | 2025 |
| Kensington Global Services Limited | Professional & scientific | 2016 |
| Kensom Ltd | Professional & scientific | 2026 |
| Kent Feet Limited | Health & social care | 2015 |
| Kent Foot & Ankle Clinic Limited | Health & social care | 2013 |
| Kent ST Wines UK Ltd | Wholesale & retail | 2011 |
| Kepple Plumbing & Heating Ltd. | Construction | 2017 |
| Kermit Healthcare Limited | Health & social care | 2025 |
| Kerryco. Ltd | Wholesale & retail | 2023 |
| Kety Events Ltd | Transport & logistics | 2019 |
| Kev's Star Ltd | Other services | 2019 |
| Kevin Construction London Ltd | Construction | 2024 |
| Kevin Dowling Ltd | Construction | 2020 |
| Kevin Enterprises Ltd | Transport & logistics | 2023 |
| Kevin Feeney Plant Hire Ltd | Construction | 2010 |
| Key Air & Sea Group Limited | Financial services | 2018 |
| Key Air & Sea Limited | Transport & logistics | 1991 |
| Keyoptions Limited | Administrative & support | 2018 |
| Keysa Trading Incorporation Limited | Wholesale & retail | 2020 |
| KG Intu Ltd | Wholesale & retail | 2024 |
| KG Leisure Ltd | Arts & recreation | 2012 |
| KG Stores Three Ltd | Wholesale & retail | 2025 |
| Kglifting Ltd | Construction | 2021 |
| KH Aspire Consulting Ltd | Other services | 2020 |
| KH Roofing Ltd | Construction | 2025 |
| Khadijah's Collection Limited | Wholesale & retail | 2025 |
| Khah Kiani Company Ltd | Wholesale & retail | 2024 |
| Khai Ltd | Transport & logistics | 2026 |
| Khaira Property Solutions Ltd | Real estate | 2023 |
| Khaira Ventures Ltd | Real estate | 2022 |
| Khalid Barber Shop Ltd | Other services | 2025 |
| Khalsa Builder London Ltd | Construction | 2023 |
| Khalsa Construction Limited | Construction | 2016 |
| Khalsa Design & Build Ltd | Construction | 2021 |
| Khalsa Diwan (AFG) Limited | Real estate | 2025 |
| Khalsa Food Delight Ltd | Hospitality | 2025 |
| Khalsa Fostering C.I.C. | Health & social care | 2020 |
| Khalsa Roofing Ltd | Construction | 2021 |
| Khalsa Scaffolding Ltd | Construction | 2021 |
| Khalsa Services Ltd | Transport & logistics | 2020 |
| Khalsa Transport Service Ltd | Transport & logistics | 2021 |
| Khalsa UK Properties Ltd | Real estate | 2023 |
| Khan Building Solution Ltd | Construction | 2021 |
| Khaneja Superfood Ltd | Wholesale & retail | 2015 |
| Khanna Transport Limited | Transport & logistics | 2016 |
| Khans Recruitment Limited | Construction | 2025 |
| Khara Logistics Ltd | Transport & logistics | 2026 |
| Khara Logistics Ltd Ltd | Transport & logistics | 2026 |
| Kharb Transport Ltd | Transport & logistics | 2025 |
| Khattab SAT Limited | Other services | 2010 |
| Khatushyam Holdings Ltd | Hospitality | 2026 |
| Khera Limited | Construction | 2005 |
| Kheri Builders Ltd | Construction | 2024 |
| Khinda Property Ltd | Real estate | 2025 |
| Khinda Transport Ltd | Transport & logistics | 2019 |
| Khingsmere Tech Consulting Limited | Information & communication | 2025 |
| Khoker Ltd | Construction | 2024 |
| Khosa Courier Ltd | Transport & logistics | 2026 |
| Khosa Estates Limited | Real estate | 2024 |
| Khosa Properties Ltd | Real estate | 2021 |
| Khosha Bakery Ltd | Manufacturing | 2018 |
| Khurana & Sons Ltd | Wholesale & retail | 2014 |
| Khurana Convenience Store Ltd | Wholesale & retail | 2025 |
| Khurana Investments Limited | Real estate | 2019 |
| Khurram Abbas Enterprises Ltd | Wholesale & retail | 2026 |
| Khushi Contractors Ltd | Construction | 2024 |
| Khushi Wedding Services Private Limited | Hospitality | 2014 |
| Kiaan Brickwork Ltd | Construction | 2019 |
| Kiaan Investments Ltd | Real estate | 2024 |
| Kiara Singh Ltd | Wholesale & retail | 2024 |
| Kicktopiaa Ltd | Wholesale & retail | 2025 |
| Kidkin Ltd | Wholesale & retail | 2018 |
| Kids Care (UK) Limited | Health & social care | 2014 |
| Kiely Property Ltd | Real estate | 2024 |
| Kieran Corbett Ltd | Wholesale & retail | 2019 |
| KIG Enterprises Limited | Hospitality | 2013 |
| Killerz Ltd | Hospitality | 2023 |
| Kimisu Limited | Real estate | 2017 |
| Kinedexe UK Limited | Professional & scientific | 2014 |
| Kinetic Family Invesments Ltd | Real estate | 2025 |
| Kinetic Shutter and Shopfronts Ltd | Other services | 2026 |
| Kingdom Haircuts Limited | Other services | 2024 |
| Kingfisher Windows Ltd | Manufacturing | 2023 |
| Kingshill Estates Ltd | Other services | 2011 |