| Kilobyte Projects Ltd | Information & communication | 2022 |
| Kilona Ltd | Wholesale & retail | 2025 |
| Kilosonic Ltd | Arts & recreation | 2025 |
| Kilowave Ltd | Information & communication | 2025 |
| Kilway Limited | Administrative & support | 2024 |
| Kimballs Parlquist Ltd | Wholesale & retail | 2025 |
| Kimble Autos Ltd | Wholesale & retail | 2025 |
| Kimgal Technologies Ltd | Information & communication | 2026 |
| Kimz Ecommerce Limited | Wholesale & retail | 2026 |
| Kinflare Ltd | Wholesale & retail | 2025 |
| Kingdom Start Enterprise Limited | Professional & scientific | 2018 |
| Kingdown Property Group Limited | Real estate | 2024 |
| Kingfield Mill Property Limited | Real estate | 2026 |
| Kingfisher Installation Services Ltd | Construction | 2024 |
| Kings of Retail Therapy Ltd | Wholesale & retail | 2023 |
| Kingswok Ltd | Hospitality | 2025 |
| Kington Building Supplies (Holdings) Limited | Financial services | 2023 |
| Kington Building Supplies Limited | Wholesale & retail | 1983 |
| Kington Catering Limited | Hospitality | 2026 |
| Kington Chiropractic Limited | Health & social care | 2021 |
| Kington Commercial Rentals (Holdings) Limited | Financial services | 2023 |
| Kington Commercial Rentals Limited | Hospitality | 2005 |
| Kington Community Rooms (KCR) Limited | Real estate | 2021 |
| Kington Education Limited | Information & communication | 2025 |
| Kington Golf Club Trading Ltd | Arts & recreation | 2024 |
| Kington Lettings Ltd | Hospitality | 2026 |
| Kington Museum and History Centre Ltd | Arts & recreation | 2020 |
| Kington Property Developments (Holdings) Limited | Financial services | 2023 |
| Kington Property Developments Limited | Construction | 2023 |
| Kington Self Storage Ltd | Transport & logistics | 2024 |
| Kington Weiquan Limited | Professional & scientific | 2025 |
| Kinta Services Ltd | Professional & scientific | 2021 |
| Kintran Resources Co., Ltd | Extraterritorial | 2014 |
| Kintrue Global Finance Limited | Professional & scientific | 2025 |
| Kintyre Payroll Services Limited | Administrative & support | 2024 |
| Kinvella Ltd | Wholesale & retail | 2025 |
| Kiorgrece Ltd | Wholesale & retail | 2025 |
| Kirkland Accountants Ltd | Professional & scientific | 2025 |
| Kirkstall Place Management Company Limited | Households | 2023 |
| Kirlangic YAT Ltd | Administrative & support | 2026 |
| Kirmans Cables Ltd | Wholesale & retail | 2024 |
| Kirouani Ltd | Wholesale & retail | 2023 |
| Kirsty Clarkson Ltd | Extraterritorial | 2024 |
| Kirsty Raynor Coaching Ltd | Other services | 2021 |
| Kismet Associates Limited | Professional & scientific | 1999 |
| Kissaint Ltd | Extraterritorial | 2024 |
| Kissfury Ltd | Manufacturing | 2025 |
| Kissly Ltd | Information & communication | 2025 |
| Kissroy Ltd | Extraterritorial | 2024 |
| Kitab Limited | Real estate | 2023 |
| Kitchen Table Gist Community Interest Company | Education | 2025 |
| Kitonediet Limited | Wholesale & retail | 2024 |
| Kitted Ltd | Manufacturing | 2025 |
| Kittyliio Ltd | Wholesale & retail | 2025 |
| Kitzm Holdings Ltd | Manufacturing | 2019 |
| Kiwisun Ltd | Wholesale & retail | 2012 |
| Kjnjg Ltd | Wholesale & retail | 2025 |
| KK Fibre Ltd | Information & communication | 2025 |
| KKA Consultants Ltd | Professional & scientific | 2026 |
| Kkui Hiun Trading Limited | Wholesale & retail | 2025 |
| KL TEK Limited | Wholesale & retail | 2020 |
| Klaraa Developments Limited | Construction | 2020 |
| Klargo LY Ltd | Wholesale & retail | 2025 |
| KLE Care Consultancy Ltd | Professional & scientific | 2025 |
| Kleensmart Ltd | Manufacturing | 2016 |
| Kleine Holthaus Limited | Administrative & support | 2024 |
| Klemann Limited | Wholesale & retail | 2018 |
| Kloring Ltd | Extraterritorial | 2024 |
| Klyo Fashion Ltd | Wholesale & retail | 2025 |
| Klyvant Ltd | Administrative & support | 2025 |
| Kmada Lifts Ltd | Manufacturing | 2026 |
| Kmeris International Trading Ltd | Wholesale & retail | 2026 |
| KMI Property Ltd | Real estate | 2022 |
| Kmind Ltd | Information & communication | 2024 |
| Kmregroup (Brierley) Ltd | Construction | 2013 |
| Kmregroup (Mabgate) Ltd | Construction | 2016 |
| Kmregroup Ltd | Construction | 2013 |
| KMS Ecom Ltd | Wholesale & retail | 2025 |
| Knitgoods Online Limited | Wholesale & retail | 2026 |
| Knitt Kitten Limited | Wholesale & retail | 2025 |
| KNN Internal Drive International Education Group Ltd | Education | 2025 |
| Knot Just Plane Wood Ltd | Manufacturing | 2020 |
| Knowmed Ltd | Health & social care | 2025 |
| Knsmarkets Limited | Financial services | 2021 |
| KNT Technologies Ltd | Information & communication | 2020 |
| Koban Management Ltd | Real estate | 2025 |
| Kobbyjesh Ltd | Health & social care | 2018 |
| Kobelle Ltd | Extraterritorial | 2026 |
| Kobobakehouse Ltd | Wholesale & retail | 2026 |
| Kocoll Ltd | Extraterritorial | 2026 |
| Kodaisy Ltd | Extraterritorial | 2024 |
| Kodex Interactive Ltd | Manufacturing | 2026 |
| Kofill Ltd | Extraterritorial | 2026 |
| Kokkatte Ltd | Professional & scientific | 2024 |
| Koko T Limited | Wholesale & retail | 2026 |
| Koli Trading Limited | Wholesale & retail | 2023 |
| Kollect Ltd | Wholesale & retail | 2020 |
| Komfi Casa Ltd | Hospitality | 2025 |
| Komile Ltd | Extraterritorial | 2026 |
| Konice Limited | Wholesale & retail | 2024 |