| Karma Dance (Mental Health & Trauma) CIC | Education | 2022 |
| Karma Habesha Limited | Hospitality | 2023 |
| Karma Property Services Ltd | Households | 2026 |
| Karna Group Ltd | Hospitality | 2025 |
| Karna Properties Limited | Real estate | 2025 |
| Karolia (UK) Ltd | Wholesale & retail | 2010 |
| Karoy Limited | Professional & scientific | 2020 |
| Karpagam Limited | Real estate | 2023 |
| Karpatia Property Ltd | Real estate | 2023 |
| Karpaty Leeds Ltd | Wholesale & retail | 2019 |
| Kartar & Co Leeds Ltd | Real estate | 2025 |
| Karteks Pack Ltd | Wholesale & retail | 2024 |
| Karvan Aero Trading Ltd | Other services | 2011 |
| Karvani's Properties Ltd | Real estate | 2003 |
| Karvanis Ltd | Real estate | 2003 |
| Karzen Limited | Health & social care | 2020 |
| KAS Records Limited | Information & communication | 2025 |
| KAS Transport Ltd | Transport & logistics | 2024 |
| Kasadi Limited | Health & social care | 2018 |
| Kase Outlet Ltd | Wholesale & retail | 2023 |
| Kasel Group Limited | Financial services | 2025 |
| Kasher Ltd | Health & social care | 2019 |
| Kashif Effendi Ltd | Health & social care | 2019 |
| Kashif Rehman Ltd | Information & communication | 2014 |
| Kashimutt Ltd | Health & social care | 2012 |
| Kashimutt Properties Ltd | Real estate | 2025 |
| Kashmir Group Holdings Ltd | Financial services | 2023 |
| Kashmir Hair & Cosmetics Ltd | Wholesale & retail | 2023 |
| Kashmir Supermarket Ltd | Wholesale & retail | 2013 |
| Kashmir Ventures Limited | Wholesale & retail | 2025 |
| Kashmiri Aroma (S Yorks) LLP | | 2019 |
| Kashmiri Foods Ltd | Hospitality | 2019 |
| Kasl Precision Machining Limited | Professional & scientific | 1997 |
| Kasmera Holdings Ltd | Administrative & support | 2021 |
| Kasmyn Chen Ltd | Professional & scientific | 2017 |
| Kasper Services Limited | Wholesale & retail | 2025 |
| Kassyayan Delivery Ltd | Transport & logistics | 2025 |
| Kastoor Limited | Wholesale & retail | 2024 |
| KAT Logistics Ltd | Transport & logistics | 2021 |
| Kata Care Solutions Limited | Professional & scientific | 2022 |
| Katamand Concept Ltd. | Wholesale & retail | 2019 |
| Katana Creative Media Limited | Professional & scientific | 2010 |
| Katana Organisation Limited | Administrative & support | 2018 |
| Katatonia Limited | Arts & recreation | 2009 |
| Kate Elizabeth Field Funeral Directors Ltd. | Other services | 2018 |
| Kate Lister Limited | Information & communication | 2025 |
| Kate Sheehan Limited | Administrative & support | 2021 |
| Kate Singleton Limited | Real estate | 2025 |
| Katem Hire Limited | Transport & logistics | 1995 |
| Katemfe & Co. Ltd | Manufacturing | 2025 |
| Katerina Aesthetics Ltd | Health & social care | 2021 |
| Katgail | Financial services | 2021 |
| Kath Wells Estate Agents Limited | Financial services | 2025 |
| Katherine Robinson Limited | Professional & scientific | 2026 |
| Kathom Limited | Health & social care | 2026 |
| Katie and MAY Ltd | Wholesale & retail | 2017 |
| Katie Bentley Ceramics Limited | Manufacturing | 2021 |
| Katie Williams Massage Therapy Limited | Other services | 2018 |
| Katie's Forever Photography Ltd | Professional & scientific | 2019 |
| KATOO1 Limited | Real estate | 2018 |
| Katrina & Sons Restaurant Ltd | Hospitality | 2025 |
| Katrina's Care Ltd | Health & social care | 2019 |
| Katt Scaffold Ltd | Construction | 2025 |
| Katy and James Investments Limited | Real estate | 2022 |
| Kaur G Ltd | Wholesale & retail | 2024 |
| Kaur Recruitment Ltd | Administrative & support | 2022 |
| Kaurblinds&Curtainsltd Ltd | Wholesale & retail | 2025 |
| Kauser Limited | Professional & scientific | 2016 |
| Kaushik Design and Build Limited | Professional & scientific | 2023 |
| KAV Assets Limited | Financial services | 2025 |
| Kavaala Ltd | Wholesale & retail | 2020 |
| Kavendor Limited | Manufacturing | 2000 |
| Kavin Meded Ltd | Professional & scientific | 2026 |
| Kawooky Properties Limited | Real estate | 2026 |
| KAY & Co Property Limited | Professional & scientific | 2019 |
| KAY & Fryer Limited | Water & waste | 1962 |
| KAY Engineering Services Limited | Professional & scientific | 2025 |
| KAY Hollingworth Ltd | Real estate | 2018 |
| Kaya UK Holding Ltd | Financial services | 2022 |
| Kaye Property Investments Limited | Extraterritorial | 2025 |
| Kaye Property Services Limited | Construction | 2023 |
| Kayecomms Limited | Professional & scientific | 2019 |
| Kayedem Group Ltd | Financial services | 2026 |
| Kayelek Limited | Construction | 2016 |
| Kayhew Ltd | Wholesale & retail | 2023 |
| Kaylame Careconnect Limited | Water & waste | 2025 |
| Kayleigh Jane Academy Limited | Education | 2022 |
| Kayleigh Jane Extensions Ltd | Other services | 2019 |
| Kaymond Limited | Health & social care | 2025 |
| Kaynaan House Ltd | Hospitality | 2025 |
| Kayplex Limited | Information & communication | 2014 |
| Kays 45 Ltd | Hospitality | 2026 |
| Kays Estates Ltd | Real estate | 2017 |
| Kays Estates SK Limited | Real estate | 2020 |
| KAYS-24-7 Care Services Ltd | Administrative & support | 2018 |
| Kaysam Ltd | Wholesale & retail | 2024 |
| Kaytee Limited | Health & social care | 2022 |
| Kayumba Properties Ltd | Construction | 2023 |
| Kaywan Services Ltd | Transport & logistics | 2026 |
| KAZ. PUB. Leeds Ltd | Hospitality | 2026 |