| Kaan Trading Limited | Hospitality | 2025 |
| Kabul Vegetables Limited | Wholesale & retail | 2024 |
| Kadayappan Ltd | Wholesale & retail | 2020 |
| Kadirogullari Ltd | Hospitality | 2016 |
| Kahr Group Limited | Information & communication | 2017 |
| Kahrod IT Services Ltd | Information & communication | 2023 |
| Kaila Constructions Limited | Construction | 2013 |
| Kaila Investments Private Limited | Construction | 2024 |
| Kailey Transport Limited | Transport & logistics | 2015 |
| Kairos Capital Group Ltd | Wholesale & retail | 2025 |
| Kaler Designs Ltd | Wholesale & retail | 2021 |
| Kalsana Courier Ltd | Transport & logistics | 2021 |
| Kanda Sourced Ltd | Wholesale & retail | 2026 |
| Kang News Ltd | Wholesale & retail | 2014 |
| Kaph Drinks & Food Ltd | Hospitality | 2026 |
| Kapoor Dynamics Limited | Real estate | 2025 |
| Kaptin Properties Ltd | Real estate | 2025 |
| Karan Vining Construction Limited | Manufacturing | 2025 |
| Karis Scarlette Ltd | Education | 2020 |
| Kartar Invests Ltd | Real estate | 2025 |
| Kasani Ltd | Real estate | 2024 |
| Kate Blake Coaching Limited | Information & communication | 2018 |
| Katjes Fassin UK Limited | Administrative & support | 2014 |
| Kaur Associates Ltd | Professional & scientific | 2025 |
| Kaura Skip Hire Limited | Construction | 2022 |
| Kavakhu Real Estate Ltd | Real estate | 2026 |
| KAY Africana Restaurant and Lounge Ltd | Hospitality | 2024 |
| KAY Foods Ltd | Wholesale & retail | 2020 |
| KAY9 Security Ltd | Other services | 2023 |
| Kazoku Estates Limited | Real estate | 2025 |
| KB Constructions U.K. Ltd | Construction | 2025 |
| KB Roofing Services Ltd | Construction | 2025 |
| KCK Odum Limited | Health & social care | 2017 |
| KD Motor Bham Ltd | Wholesale & retail | 2024 |
| KDP Properties Ltd. | Real estate | 2021 |
| Keaa Properties Ltd | Real estate | 2022 |
| KEERAT@2506 Ltd | Transport & logistics | 2025 |
| Kelly Logistics Ltd | Administrative & support | 2023 |
| Kenect PAY Ltd | Administrative & support | 2021 |
| Keng Inter-Services Limited | Transport & logistics | 2017 |
| Kenricks Limited | Financial services | 2005 |
| Kestrel Software Ltd | Information & communication | 2025 |
| Ketley Local Ltd | Wholesale & retail | 2026 |
| Kettle Healthcare Ltd | Health & social care | 2011 |
| Kewal Brothers Textiles Limited | Manufacturing | 1979 |
| Kewtube Limited | Manufacturing | 1972 |
| Key Financial Decisions Ltd | Financial services | 2019 |
| Key Flex Limited | Construction | 2025 |
| Keynest Realty Limited | Real estate | 2025 |
| Keystone Developments (Midlands) Ltd | Construction | 2026 |
| KG Drylining Ltd | Construction | 2023 |
| KG Information Technology Ltd | Information & communication | 2012 |
| KGH & Catering Ltd | Hospitality | 2019 |
| KGR Holdings Ltd | Households | 2018 |
| Khadijat & Joy Venture Ltd | Wholesale & retail | 2026 |
| Khadim Properties Ltd | Real estate | 2018 |
| Khalsa Food Junction Ltd. | Hospitality | 2021 |
| Khalsa Glazing Ltd | Construction | 2025 |
| Khan Legal Limited | Professional & scientific | 2013 |
| Khaspaze Ltd | Real estate | 2022 |
| Khaspaze NAN Holdings Ltd | Financial services | 2024 |
| Khawaja Merchants Limited | Wholesale & retail | 2021 |
| KHM Design Ltd | Professional & scientific | 2020 |
| Khoya Ltd | Wholesale & retail | 2023 |
| Khoya Sweets Ltd | Wholesale & retail | 2020 |
| Khyber Shop Ltd | Wholesale & retail | 2023 |
| KIM Sweetness Touch Limited | Hospitality | 2021 |
| King Kourier Limited | Transport & logistics | 2019 |
| Kingdom Cafe Limited | Hospitality | 2026 |
| Kingfisher Corporation Ltd | Real estate | 1992 |
| Kingsway Stores Limited | Wholesale & retail | 2015 |
| Kinsmit Holdings Limited | Administrative & support | 2026 |
| Kinsmit Operations Limited | Administrative & support | 2026 |
| Kinu Ltd | Construction | 2025 |
| KIP Clothing Ltd | Manufacturing | 2013 |
| Kipo Food Limited | Hospitality | 2023 |
| Kiran Jewellery Ltd | Wholesale & retail | 2022 |
| Kiran's Fashion Ltd | Wholesale & retail | 2026 |
| Kite Courier Limited | Transport & logistics | 2021 |
| KIU Services Ltd | Administrative & support | 2023 |
| KJ Properties WM Ltd | Real estate | 2025 |
| KKK Carers Limited | Health & social care | 2020 |
| KME Yorkshire Limited | Wholesale & retail | 1986 |
| KN Courier Ltd | Transport & logistics | 2024 |
| Knight Hawk Group Limited | Real estate | 2023 |
| Knightly Retreats Ltd | Hospitality | 2025 |
| Knightswood Solicitors Ltd | Professional & scientific | 2020 |
| Koasha Investments Ltd | Real estate | 2019 |
| Kofe Bar Limited | Hospitality | 2022 |
| Kofi Stone Limited | Information & communication | 2023 |
| Koloman Car Wash Ltd | Other services | 2017 |
| Korcen Limited | Transport & logistics | 2015 |
| Kore Graphic Design Ltd | Professional & scientific | 2013 |
| Kostimihad Ltd | Wholesale & retail | 2022 |
| Kotokuraba Market UK Limited | Wholesale & retail | 2024 |
| Kporfor Viwo(Madeelem) Properties Limited | Households | 2023 |
| Kraft & Hand Ltd | Construction | 2022 |
| Krixta Global Enterprise Limited | Wholesale & retail | 2025 |
| Kryten IT Limited | Professional & scientific | 2016 |
| KS Epos Ltd | Manufacturing | 2025 |