| K&K Medix Ltd | Manufacturing | 2025 |
| K&Klo Ltd | Professional & scientific | 2025 |
| K&M Automotive Yorkshire Ltd | Wholesale & retail | 2024 |
| K&M FOY Holdings Limited | Financial services | 2025 |
| K&Sk Ltd | Hospitality | 2023 |
| K&Y Consultants Ltd | Other services | 2021 |
| K&Z88 Ltd | Professional & scientific | 2018 |
| K'S Cabling Limited | Information & communication | 2010 |
| K-7 Cleaning Services Ltd | Administrative & support | 2025 |
| K-7 Property Services Ltd | Construction | 2024 |
| K-Properties (UK) Limited | Real estate | 2009 |
| K. Dene Ltd | Information & communication | 2023 |
| K.A.D Waste Ltd | Water & waste | 2026 |
| K.C Electrical Solutions Ltd | Construction | 2026 |
| K.I.S Management Limited | Professional & scientific | 2023 |
| K.J.M Civils Ltd | Construction | 2020 |
| K.J.M Plant Services Limited | Construction | 2016 |
| K.M Autos Leeds Ltd | Wholesale & retail | 2020 |
| K.P.Edg Ltd | Professional & scientific | 2016 |
| K.S Building & Refurbishment Services Ltd | Construction | 2021 |
| K.Seelan Retail Ltd | Administrative & support | 2016 |
| K.T Beauty Academy Ltd | Other services | 2022 |
| K.W Group Ltd | Construction | 2026 |
| K1 Barbers Leeds Ltd | Other services | 2025 |
| K1 Courier Services Ltd | Transport & logistics | 2019 |
| K10 Development Group Ltd | Real estate | 2025 |
| K10 Systems (North West) Ltd | Construction | 2022 |
| K10 Systems Ltd | Construction | 2015 |
| K10 Vision Holdings Limited | Financial services | 2021 |
| K10 Vision Limited | Information & communication | 2021 |
| K1000 Food and Beverage Manufacture, Research, and Innovation Company Limited | Manufacturing | 2025 |
| K14 Limited | Real estate | 2020 |
| K1NGS Cars Ltd | Wholesale & retail | 2020 |
| K2 Lettings and Management Ltd | Real estate | 2019 |
| K2 Pizza Ltd | Hospitality | 2017 |
| K2 Property Maintain Limited | Administrative & support | 2019 |
| K2 Renewable Energy Ltd | Energy | 2022 |
| K3M UK Ltd | Real estate | 2026 |
| K7 Supply Chain Ltd | Transport & logistics | 2013 |
| K7SPV1 Ltd | Real estate | 2025 |
| K9 Officers of Shield Ltd | Administrative & support | 2018 |
| K9 Overwatch UK Limited | Administrative & support | 2023 |
| K@$H Ltd | Real estate | 2024 |
| KA Accountants Ltd | Professional & scientific | 2025 |
| KA Consultant Services Ltd | Professional & scientific | 2025 |
| KA Employability Limited | Administrative & support | 2019 |
| KA Executive Search Limited | Administrative & support | 2010 |
| KA Group Services Ltd | Professional & scientific | 2018 |
| KA Jones LLP | | 2014 |
| KA Legal Limited | Other services | 2025 |
| KA Warehousing Limited | Transport & logistics | 1986 |
| KA2P Ltd | Arts & recreation | 2018 |
| Kaam Holdings Limited | Professional & scientific | 2009 |
| Kaandmi Properties Ltd | Real estate | 2021 |
| Kaashi (SK) Ltd | Hospitality | 2020 |
| Kaashi Property Ltd | Real estate | 2026 |
| Kabdol Ltd | Transport & logistics | 2026 |
| Kabsec Training UK Ltd | Education | 2023 |
| Kabul Alliance Ltd | Hospitality | 2025 |
| Kacm Unlimited | Professional & scientific | 2024 |
| Kadak Tea Ltd | Wholesale & retail | 2023 |
| Kadampa Meditation Centre Leeds | Other services | 2009 |
| Kaddy Portfolio Investments Limited | Real estate | 2024 |
| Kaddy Properties Ltd | Real estate | 2021 |
| Kadre Law Limited | Professional & scientific | 2026 |
| KAF Developments Ltd | Real estate | 2017 |
| KAF Holiday Let's Limited | Real estate | 2021 |
| KAF Investment Property Ltd | Real estate | 2019 |
| Kafait Travel Ltd | Administrative & support | 2022 |
| Kafeel ALI Haider Limited | Hospitality | 2022 |
| KAG Holdings Limited | Financial services | 2020 |
| Kagger Group Limited | Financial services | 2025 |
| Kahu Katies Limited | Wholesale & retail | 2024 |
| KAI Building and Renovations Ltd | Construction | 2022 |
| KAI Property Consultants Ltd | Construction | 2026 |
| Kailo Global Services Limited | Information & communication | 2025 |
| Kaim Todner Solicitors Limited | Professional & scientific | 2010 |
| Kainaat Nadeem Designers Ltd | Wholesale & retail | 2023 |
| Kaipol Ltd | Wholesale & retail | 2020 |
| Kairo Cleaning Company Ltd | Administrative & support | 2022 |
| Kairos Cafe Limited | Hospitality | 2023 |
| Kairos Property (Yorkshire) Ltd | Real estate | 2026 |
| Kairos Property Services Limited | Real estate | 2015 |
| Kairos Technological Pilots Ltd | Information & communication | 2024 |
| Kaiser Solicitors Limited | Professional & scientific | 2014 |
| Kaitatsu Ltd | Hospitality | 2026 |
| Kaitel Solutions Ltd | Professional & scientific | 2025 |
| Kaiwan Barber Limited | Other services | 2021 |
| Kaiyuan Education Limited | Education | 2021 |
| Kaiz AK Ltd | Information & communication | 2025 |
| Kaizen CBT Ltd | Health & social care | 2016 |
| Kaizen Consulting Engineers Limited | Professional & scientific | 2020 |
| Kaizen Contracting Limited | Professional & scientific | 2023 |
| Kaizen Property Holdings Ltd | Real estate | 2017 |
| Kaizen Siatat Ltd | Wholesale & retail | 2015 |
| Kajal Developing Ltd | Real estate | 2021 |
| Kakkoii Ltd | Wholesale & retail | 2020 |
| Kaks Beauty Ltd | Other services | 2026 |
| Kaks Burgers and Desserts Ltd | Hospitality | 2025 |
| Kaks Property Management Ltd | Real estate | 2025 |