| Kioma Ltd | Information & communication | 2021 |
| Kiosk News Stop Ltd | Wholesale & retail | 2019 |
| Kira Holdings Ltd | Construction | 2019 |
| Kira Maxi Holdings Ltd. | Financial services | 2024 |
| Kirkham Piping Solutions Ltd | Professional & scientific | 2019 |
| Kirkless Haulage Ltd | Transport & logistics | 2018 |
| Kirkman Developments LLP | | 2024 |
| Kirkpatrick Industrial Ltd | Other services | 2016 |
| Kirkpatrick Properties Ltd | Real estate | 2014 |
| Kirkstile Place Management Limited | Professional & scientific | 1987 |
| Kirstie B Consulting Ltd | Professional & scientific | 2024 |
| Kirsty’S Boutique Bakery Ltd | Manufacturing | 2024 |
| Kishan & Ankit Developments Limited | Real estate | 2024 |
| Kishjag Estates Ltd | Real estate | 2025 |
| Kismat Foods Ltd | Wholesale & retail | 2016 |
| Kiswathobes Ltd | Wholesale & retail | 2026 |
| KIT Weaver Ltd | Professional & scientific | 2022 |
| Kitchen and Living Space Creations Ltd | Manufacturing | 2022 |
| Kitchen Facelifts Ltd | Administrative & support | 2009 |
| Kite Stars Ltd | Wholesale & retail | 2026 |
| Kithkins Ltd | Wholesale & retail | 2025 |
| Kithom Limited | Real estate | 2025 |
| Kitukustito and Jackslon Ltd | Wholesale & retail | 2026 |
| KIV. Johnston Limited | Hospitality | 2025 |
| Kixx Bolton Ltd | Education | 2019 |
| Kjamm Limited | Wholesale & retail | 2004 |
| KJD Aesthetics Ltd | Other services | 2022 |
| Kjjc Holdings Ltd | Financial services | 2024 |
| KJK Solutions Limited | Information & communication | 2007 |
| KJL Bertra Limited | Real estate | 2026 |
| KJM Creative Limited | Professional & scientific | 2024 |
| KJR Business Consultancy Limited | Professional & scientific | 2017 |
| KK Technologies Ltd | Wholesale & retail | 2025 |
| KKB Transport Ltd | Other services | 2019 |
| KKO Electrical Ltd | Construction | 2026 |
| KL Energy Consultants Ltd | Administrative & support | 2025 |
| KL Order Limited | Hospitality | 2022 |
| Klasp Prosthesis Laboratory Limited | Health & social care | 2013 |
| Klaveron Limited | Information & communication | 2025 |
| Klaws London Limited | Other services | 2023 |
| KLH Autographs Limited | Wholesale & retail | 2014 |
| Klikta Limited | Information & communication | 2018 |
| Klivia Ltd | Wholesale & retail | 2023 |
| KLJ2025 Ltd | Transport & logistics | 2025 |
| Kllm Consulting Limited | Information & communication | 2013 |
| KLM Transport Consultancy Ltd | Professional & scientific | 2025 |
| KLN Decorators Limited | Construction | 2012 |
| KLS Civils Ltd | Construction | 2022 |
| Klubb Catering Ltd | Hospitality | 2019 |
| KM Capital & Investments Ltd | Real estate | 2023 |
| KM Creative Brand Solutions Ltd | Professional & scientific | 2024 |
| KM Services Nationwide Ltd | Administrative & support | 2017 |
| Kmbl Holdings Ltd | Financial services | 2023 |
| Kmcube Ltd | Wholesale & retail | 2024 |
| Kmfi Limited | Financial services | 2020 |
| KMG Entertainments Ltd | Hospitality | 2024 |
| KMH Logistics Ltd | Wholesale & retail | 2024 |
| KMM Repairs and Breakers Ltd | Wholesale & retail | 2021 |
| KMR Export Limited | Wholesale & retail | 2025 |
| KMS Bolton Ltd | Wholesale & retail | 2026 |
| KMT Engineering Limited | Professional & scientific | 2024 |
| KMV Medical Consultancy Services Ltd | Health & social care | 2012 |
| KN & Partners Limited | Professional & scientific | 2024 |
| KN Goods UK Ltd | Wholesale & retail | 2023 |
| KN9292 Limited | Wholesale & retail | 2025 |
| Knaro Ltd | Information & communication | 2025 |
| Knet Autos UK Limited | Wholesale & retail | 2023 |
| KNF Linx Limited | Information & communication | 2017 |
| KNH Import & Export Wholesale Ltd | Wholesale & retail | 2023 |
| Knight (HC) Limited | Financial services | 2023 |
| Knight (PM) Limited | Real estate | 2023 |
| Knight (Prop Co) Limited | Real estate | 2023 |
| Knight Corporate Finance Group Limited | Financial services | 2020 |
| Knight Property Consulting Limited | Professional & scientific | 2015 |
| Knight R&D Limited | Professional & scientific | 2016 |
| Knights Apparel Limited | Wholesale & retail | 2025 |
| Knights Law Solicitors Ltd | Professional & scientific | 2014 |
| Knightsbridge Business Sales Limited | Professional & scientific | 2014 |
| Knightsbridge Hydraulics Ltd | Administrative & support | 2020 |
| Knightsbridge Media Group Limited | Professional & scientific | 2014 |
| Knightsbridge Private Equity Ltd | Financial services | 2019 |
| Knightswood Fire Safety Limited | Public administration | 2023 |
| Knightswood Motors Ltd | Wholesale & retail | 2024 |
| Knockton and Co Limited | Wholesale & retail | 2011 |
| Knollingdan Advisory Ltd | Professional & scientific | 2024 |
| Knossington Grange School Limited | Education | 1977 |
| Knot a Care Ltd | Administrative & support | 2026 |
| Knott END Properties Ltd | Real estate | 2021 |
| Know HOW Technology (KHT) Ltd | Wholesale & retail | 2025 |
| Know the Code Limited | Administrative & support | 2025 |
| Knowledge Circle Ltd | Information & communication | 2004 |
| Knowledge Online Global Ltd | Education | 2022 |
| Knowles Electrical Solutions Limited | Construction | 2025 |
| Knowlex Limited | Administrative & support | 2015 |
| Knowsley ST Mini Market Limited | Wholesale & retail | 2025 |
| KNS Foods Ltd | Wholesale & retail | 2011 |
| KNS Mobile Valeting Limited | Wholesale & retail | 2019 |
| Knst Solutions Ltd | Information & communication | 2016 |
| Knutsford & District Motor Club Limited | Arts & recreation | 1982 |
| KO Property Ltd | Construction | 2023 |