| K&R Property PL Ltd | Real estate | 2024 |
| K&S Horizons Limited | Real estate | 2025 |
| K'S Original Kebab Limited | Hospitality | 2019 |
| K'S Original Pizza Limited | Hospitality | 2019 |
| K-Dsj Ltd | Wholesale & retail | 2017 |
| K. Crowe Limited | Administrative & support | 1996 |
| K.S. Builders & Roofers Ltd | Construction | 2021 |
| K1 Homes Ltd | Real estate | 2021 |
| K2 + Slough Limited | Hospitality | 2023 |
| K2 Build Ltd | Construction | 2025 |
| K2MP Properties Ltd | Real estate | 2021 |
| K2Z Limited | Transport & logistics | 2026 |
| K5K Limited | Health & social care | 2011 |
| KA Language Solutions Ltd | Professional & scientific | 2015 |
| KAA Consulting Limited | Information & communication | 2015 |
| Kaaf Holdings Limited | Financial services | 2023 |
| Kaaf Limited | Transport & logistics | 2023 |
| Kabaab Ltd | Hospitality | 2025 |
| Kabiyesi Shipping Lines Limited | Agriculture & fishing | 1997 |
| Kable Solutions Ltd | Information & communication | 2010 |
| Kabul Kitchen Ltd | Hospitality | 2026 |
| Kabul Palace Ltd | Hospitality | 2015 |
| Kabuliwala Slough Ltd | Hospitality | 2025 |
| KAD CAX Limited | Administrative & support | 2019 |
| KAD Property Management Ltd | Real estate | 2018 |
| Kadani Ltd | Wholesale & retail | 2021 |
| Kadiyeh Ltd | Wholesale & retail | 2022 |
| Kafura Ltd | Wholesale & retail | 2026 |
| Kagera Consult Ltd | Administrative & support | 2025 |
| Kaha Advisers Ltd | Professional & scientific | 2011 |
| Kahaani Coffee Ltd | Manufacturing | 2024 |
| Kahlon Capital Ltd | Professional & scientific | 2026 |
| Kahlon Development Ltd | Construction | 2023 |
| Kahlon Estates & Properties Ltd | Real estate | 2025 |
| Kahlon Group Holdings Ltd | Financial services | 2026 |
| Kahlon Property Group Ltd | Real estate | 2026 |
| Kahma Home Improvements Limited | Construction | 2025 |
| Kahoot Motors Ltd | Wholesale & retail | 2026 |
| Kaia Homes Limited | Real estate | 2021 |
| Kailash Family Group Ltd | Real estate | 2022 |
| Kaina Clean Ltd | Transport & logistics | 2024 |
| Kainofin Consulting Ltd | Information & communication | 2018 |
| Kair Electrical Limited | Construction | 2024 |
| Kaira Global Ltd | Information & communication | 2011 |
| Kairis Ltd | Wholesale & retail | 2025 |
| Kairos Capital Ltd | Professional & scientific | 2026 |
| Kaizen Consultancy & Advisory Limited | Financial services | 2017 |
| Kaizen Renovations Ltd | Construction | 2022 |
| Kaizenray Limited | Construction | 2025 |
| Kajah Properties Limited | Real estate | 2025 |
| Kaka'Z CUT Ltd | Other services | 2022 |
| Kako Wokula Care Services Ltd | Health & social care | 2024 |
| KAL and Nelly Ltd | Administrative & support | 2021 |
| Kalagadi Rising Eagles Ltd | Administrative & support | 2019 |
| Kalagoys Ltd | Transport & logistics | 2019 |
| Kalan Leisure Limited | Hospitality | 2019 |
| Kaleem ITA Ltd | Transport & logistics | 2022 |
| Kalis International Protection Limited | Administrative & support | 2024 |
| Kally Management Ltd | Real estate | 2025 |
| Kalpas Innovations Limited | Information & communication | 2024 |
| Kals Heating and Plumbing Services Ltd | Construction | 2025 |
| Kalsi Construction Ltd | Construction | 2011 |
| KAM Consulting Limited | Construction | 2022 |
| KAM MOT Hub Ltd | Wholesale & retail | 2025 |
| KAM Optical Limited | Professional & scientific | 2018 |
| Kamaal Foods UK Limited | Wholesale & retail | 2023 |
| Kamal Brothers Limited | Wholesale & retail | 2010 |
| Kamal Wedding Cars Ltd | Administrative & support | 2018 |
| Kamaro Medical Service Ltd | Administrative & support | 2017 |
| Kambang Limited | Professional & scientific | 2007 |
| Kambk Investments Ltd | Real estate | 2022 |
| Kamboj Haulage Ltd | Transport & logistics | 2024 |
| Kamboj PS Limited | Construction | 2025 |
| Kamel Hothi Consulting Limited | Professional & scientific | 2022 |
| Kamil Spray Cars Ltd | Wholesale & retail | 2025 |
| Kamkam Global Limited | Hospitality | 2023 |
| Kamma Sangham UK Ltd | Other services | 2016 |
| Kams Design & Build Limited | Other services | 2019 |
| Kamsaimon UK Properties Ltd | Real estate | 2024 |
| Kamsaimon UK Style Ltd. | Wholesale & retail | 2012 |
| Kamsaimon Vision Properties Ltd | Real estate | 2025 |
| Kamtek Ltd | Wholesale & retail | 2018 |
| Kanash Cars Ltd | Wholesale & retail | 2023 |
| Kanash Logistics Ltd | Transport & logistics | 2025 |
| Kanda Music House Ltd | Information & communication | 2025 |
| Kandola Enterprise Ltd | Information & communication | 2018 |
| Kandola Tradings Ltd | Financial services | 2018 |
| Kang Distributions Limited | Wholesale & retail | 2026 |
| Kang Hire Ltd | Administrative & support | 2022 |
| Kango Building Services Limited | Construction | 2023 |
| Kankan Flooring Ltd | Construction | 2026 |
| Kanrah Ltd | Professional & scientific | 2022 |
| Kantos Media Limited | Information & communication | 2023 |
| Kanyl Ltd | Real estate | 2019 |
| KAP Solutions UK Ltd | Administrative & support | 2009 |
| Kapg Solutions Ltd | Information & communication | 2025 |
| Kapoor Food & Wine Limited | Wholesale & retail | 2011 |
| Kapoor-Chopra Investments Ltd | Real estate | 2026 |
| Kapsons Estates Limited | Real estate | 2023 |
| Kaptcha Limited | Information & communication | 2013 |