| Kaniz Holdings Ltd | Real estate | 2019 |
| Kaqti Ltd | Construction | 2020 |
| KAR 1962 Limited | Professional & scientific | 2022 |
| Kare Scaffolding Ltd | Construction | 2025 |
| Karl Nicholson - Technology Innovation Ltd | Information & communication | 2023 |
| Karma Bouldering Ltd | Wholesale & retail | 2018 |
| Karuna Professional Services Ltd | Health & social care | 2015 |
| Karvas Limited | Professional & scientific | 2016 |
| Kashmiri Cuisine Ltd | Hospitality | 2025 |
| Kasp TM Limited | Construction | 2024 |
| Kate Charles Garden Design Limited | Administrative & support | 2019 |
| Kate Price & Co Accountants Ltd | Professional & scientific | 2011 |
| Kate Pugh Ltd | Health & social care | 2017 |
| Katesten (NO.2) Limited | Construction | 2026 |
| Katrina Cousins Tutoring Limited | Education | 2025 |
| Kattanandco Ltd | Hospitality | 2025 |
| KBE Consulting Ltd | Education | 2022 |
| KBL Events Limited | Arts & recreation | 2016 |
| KBL Events Medical Limited | Administrative & support | 2022 |
| KBL Events Security Limited | Administrative & support | 2022 |
| Kbla Healthcare Ltd | Professional & scientific | 2025 |
| Kbr-Speed Limited | Transport & logistics | 2019 |
| KBV Holdings Limited | Financial services | 2021 |
| KC Design Solutions Ltd | Wholesale & retail | 2021 |
| KC Roofing Services Ltd | Construction | 2025 |
| Kcrew Ltd | Construction | 2013 |
| KD Developments ( UK ) Ltd | Construction | 2012 |
| Kealy Group Enterprises Ltd | Professional & scientific | 2023 |
| Keane Architectural Design Ltd | Professional & scientific | 2016 |
| Keanoglaze Ltd | Construction | 2024 |
| Keegan and Webb Ltd | Professional & scientific | 2018 |
| Kelly Barber Associates Limited | Professional & scientific | 2003 |
| Kelvin Court Brixham Ltd | Real estate | 2009 |
| Kempsey Autos Limited | Wholesale & retail | 2021 |
| Kempsey Ltd | Hospitality | 2019 |
| Kempsey Promotions Community Interest Company | Hospitality | 2022 |
| Kempsey Social and Community CIC | Education | 2026 |
| Kempsey Tennis Club Limited | Arts & recreation | 2023 |
| Kempsey Tyres Limited | Wholesale & retail | 2024 |
| Kemys Gardens Property Co Limited | Households | 2016 |
| KEN Tallis Foods LLP | | 2014 |
| Ken's Tipper Hire Limited | Transport & logistics | 1999 |
| Kenchsuayd Limited | Health & social care | 2018 |
| Kennedy Creates Ltd | Wholesale & retail | 2026 |
| Kenswick Consulting Ltd | Professional & scientific | 2022 |
| Kenswick Limited | Real estate | 2002 |
| Kenswick Property Management Limited | Real estate | 2010 |
| Kerry Lodge Sales Ltd | Wholesale & retail | 2017 |
| Kethes Consulting Ltd | Health & social care | 2025 |
| Kevin Cave Limited | Health & social care | 2011 |
| Kevin France Limited | Professional & scientific | 2002 |
| Kewell Promotions Ltd | Administrative & support | 2016 |
| Key to Health Ltd | Information & communication | 2025 |
| Keystone Architecture & Design Ltd | Professional & scientific | 2021 |
| Keystone Estate Agents Limited | Real estate | 2026 |
| KF Driver Solutions Limited | Transport & logistics | 2021 |
| KG Builders Ltd | Construction | 2025 |
| KG Trading Services Ltd Limited | Administrative & support | 2024 |
| KGA Coldrooms Ltd | Construction | 2024 |
| KGK Electrical Ltd | Construction | 2019 |
| Kgllr Ltd | Real estate | 2025 |
| Khalid Property Holdings Ltd | Real estate | 2024 |
| Khao Thai Ltd | Extraterritorial | 2023 |
| Khawaja Group Force Ltd | Extraterritorial | 2023 |
| KHO Aftercare Limited | Wholesale & retail | 2023 |
| Kibbo Kift Agency Ltd | Professional & scientific | 2019 |
| Kidderminster 012 Limited | Hospitality | 2023 |
| Kiddie Collective Limited | Wholesale & retail | 2025 |
| Kidsnet Ltd | Administrative & support | 2012 |
| Kight Group Limited | Manufacturing | 2023 |
| Kight International Limited | Manufacturing | 2024 |
| Kight Limited | Manufacturing | 2019 |
| Kight Power Holdco Limited | Financial services | 2023 |
| Kight Power Hub Limited | Manufacturing | 2024 |
| Kight Power Limited | Manufacturing | 2023 |
| Kight WW Limited | Manufacturing | 2025 |
| Kilbury Express Ltd | Wholesale & retail | 2013 |
| Kilbury Flowers Ltd | Wholesale & retail | 2024 |
| Kiln House Associates Limited | Professional & scientific | 2004 |
| Kilnbreak Ltd | Construction | 2014 |
| Kilpatrick Greenoak Engineering Consultants Ltd | Professional & scientific | 2013 |
| KIM S Golding Limited | Health & social care | 2015 |
| Kimal Group PLC | Financial services | 1989 |
| Kimal Holdings Limited | Professional & scientific | 2012 |
| Kimal Medical Systems Limited | Manufacturing | 1984 |
| Kimal PLC | Manufacturing | 1964 |
| Kimal Sensors Ltd | Manufacturing | 2016 |
| Kind Wealth Holdings Limited | Financial services | 2021 |
| Kind Wealth Limited | Financial services | 2013 |
| Kinder Resources Ltd | Hospitality | 2023 |
| Kindi Learning Ltd | Education | 2024 |
| Kindred Coffee Limited | Hospitality | 2023 |
| Kindtoo Limited | Wholesale & retail | 2006 |
| Kinetic Engineering Ltd | Manufacturing | 2015 |
| King IT Consulting Limited | Information & communication | 2014 |
| King Sheet Metal Holdings Limited | Financial services | 2021 |
| King Sheet Metal Limited | Manufacturing | 2004 |
| King Will's Wills Ltd | Professional & scientific | 2014 |
| King's Security Ltd | Administrative & support | 2020 |
| Kingfisher Carpentry (UK) Ltd | Construction | 2025 |