| Kmod Investments Limited | Financial services | 2022 |
| KMS Property Investments and Services Ltd | Real estate | 2025 |
| Kmyb Rise Properties Ltd | Real estate | 2025 |
| KN Cladding Ltd | Construction | 2021 |
| KNC Garden Rooms Ltd | Manufacturing | 2022 |
| Knighton (Four Oaks) Ltd | Real estate | 2017 |
| Knightsbridge Oaks Ltd | Real estate | 2010 |
| Knot Bars Ltd | Hospitality | 2022 |
| Know IT ALL AI Ltd | Information & communication | 2026 |
| Knowgy Ltd | Information & communication | 2019 |
| Knowledge Tree (UK) Limited | Education | 2005 |
| KNV Properties Limited | Real estate | 2026 |
| Knwn Idol Ltd | Wholesale & retail | 2017 |
| KOA Birkenhead Ltd | Hospitality | 2021 |
| KOA Chester Ltd | Hospitality | 2021 |
| KOA Stafford Ltd | Professional & scientific | 2020 |
| KOA Telford Ltd | Hospitality | 2026 |
| KOA Warrington Ltd | Hospitality | 2020 |
| KOA Wigan Ltd | Hospitality | 2023 |
| KOB Dynamic Limited | Information & communication | 2023 |
| Kobane Convenience Store Ltd | Wholesale & retail | 2021 |
| Kobane OFF Licence Ltd | Wholesale & retail | 2020 |
| Koby Barbers Ltd | Other services | 2022 |
| Kohala Consulting Ltd | Information & communication | 2024 |
| Kohinoor Jewels Ltd | Manufacturing | 2024 |
| Kokas Chippy Limited | Hospitality | 2022 |
| Kolins Kitchen Limited | Hospitality | 2026 |
| Kombat Karate Schools Limited | Arts & recreation | 2019 |
| Kombatkids.Com Limited | Arts & recreation | 2003 |
| Komix Attorneys Ltd | Professional & scientific | 2026 |
| Konaish Ltd | Administrative & support | 2024 |
| Konke Services Limited | Real estate | 2022 |
| Konyin Drinks Ltd | Manufacturing | 2025 |
| Konyin Foods Ltd | Wholesale & retail | 2025 |
| Konyin Group Ltd | Financial services | 2025 |
| Koolfitt Training Ltd | Other services | 2024 |
| KOP Transport Ltd | Transport & logistics | 2023 |
| Korsaine Ltd | Transport & logistics | 2019 |
| Kotadia Property Limited | Real estate | 2024 |
| Kotsarini Limited | Health & social care | 2014 |
| KP Investments Limited | Real estate | 2008 |
| KP Recruitment Limited | Administrative & support | 2024 |
| Kpeakroofing Limited | Construction | 2025 |
| KPJ Tech Solutions Ltd | Wholesale & retail | 2025 |
| KPR Investments Private Limited | Real estate | 2019 |
| KPS Ventures Limited | Real estate | 2020 |
| Kpsb Construction Limited | Construction | 2026 |
| Kpsk Care Limited | Real estate | 2011 |
| Kquant Ltd | Information & communication | 2025 |
| KR8 Properties Limited | Real estate | 2019 |
| Kratos Care Limited | Health & social care | 2025 |
| Kreative Minds Ltd | Information & communication | 2024 |
| Kreativemindstudio Ltd | Information & communication | 2024 |
| Krenova Services Limited | Information & communication | 2009 |
| Krepfx Ltd | Wholesale & retail | 2024 |
| Kretos Haulage Ltd | Transport & logistics | 2014 |
| KRISCARS4 Ltd | Wholesale & retail | 2019 |
| Krismo Line Ltd | Transport & logistics | 2015 |
| KRISVANS4 Ltd | Wholesale & retail | 2022 |
| Krondor Investment Limited | Financial services | 2023 |
| KRONEN-P0PS Limited | Wholesale & retail | 2024 |
| Krothsco Holdings Limited | Financial services | 2022 |
| Krushdeals Ltd | Wholesale & retail | 2024 |
| KRY Enterprise Limited | Wholesale & retail | 2024 |
| Krypton Jewellers Holdings Limited | Financial services | 2018 |
| Krypton Refining Limited | Manufacturing | 2020 |
| KS Foods (UK) Ltd | Wholesale & retail | 2014 |
| KS Power Ltd | Administrative & support | 2026 |
| KS Services 1 UK Ltd | Construction | 2026 |
| KS Teaching Solutions Ltd | Education | 2024 |
| KSF Property Ltd | Real estate | 2024 |
| KSG Estates Ltd | Real estate | 2021 |
| KSH Designs Ltd | Professional & scientific | 2018 |
| Ksimmtool Ltd | Construction | 2025 |
| KSK Real Estate Holdings Ltd | Real estate | 2025 |
| KSL (Shin) Ltd | Real estate | 2020 |
| KSL Lettings Limited | Real estate | 2025 |
| Ksrz Ltd | Hospitality | 2023 |
| KT4 Consulting Limited | Information & communication | 2018 |
| KTG Rental Limited | Real estate | 2025 |
| KTI Fast Food Ltd | Hospitality | 2025 |
| KTS Private Limited | Wholesale & retail | 2025 |
| Kuja Limited | Hospitality | 2019 |
| Kular Group Limited | Financial services | 2026 |
| Kular Properties Ltd | Real estate | 2018 |
| Kulus Ventures Ltd | Wholesale & retail | 2025 |
| Kumala Care Ltd | Health & social care | 2020 |
| Kumar Contracting Ltd | Construction | 2023 |
| Kumar Freight Limited | Transport & logistics | 2019 |
| Kundie Ltd | Hospitality | 2013 |
| Kupakwashe Limited | Health & social care | 2022 |
| Kurdish Apos Ltd | Other services | 2024 |
| Kurdish Pizza Walsall Limited | Hospitality | 2025 |
| Kurdish Shawarma Walsall Ltd | Hospitality | 2026 |
| Kurdistan MNI Store Ltd | Wholesale & retail | 2024 |
| Kurs-Trade Limited | Wholesale & retail | 2023 |
| Kushi Candle Company Ltd | Manufacturing | 2020 |
| Kutchenhaus Walsall Ltd | Wholesale & retail | 2019 |
| Kuzmicz Building & Civils Ltd | Construction | 2025 |
| Kuzmicz Construction Limited | Construction | 2024 |