| KD Hire Ltd | Transport & logistics | 2025 |
| KD Trades Ltd | Transport & logistics | 2025 |
| Kdc-Uk Ltd. | Wholesale & retail | 2013 |
| KDK Bathroom Ware Ltd | Wholesale & retail | 2016 |
| KDL Finance Limited | Financial services | 2022 |
| Kdriving Solutions Limited | Transport & logistics | 2017 |
| Keah Group Ltd | Wholesale & retail | 2019 |
| Keam Construction Ltd | Construction | 2026 |
| Keane Art Ltd | Information & communication | 2017 |
| Keddogane Ltd | Administrative & support | 2019 |
| Kedia Projects Ltd | Construction | 2014 |
| KEE2FITNESS Limited | Arts & recreation | 2022 |
| KEE2PROPERTY Limited | Real estate | 2025 |
| Keelo Consulting Limited | Other services | 2017 |
| Keelo Consulting Services Limited | Other services | 2022 |
| Keep IT Country Ltd | Arts & recreation | 2024 |
| Keep on Trying Limited | Health & social care | 2015 |
| Keeping People Well CIC | Health & social care | 2024 |
| Keeping YOU OUT Group Ltd | Hospitality | 2024 |
| Keetrost Ltd | Wholesale & retail | 2019 |
| Keith Thompson Carpentry Services Limited | Construction | 2012 |
| Keke Services Limited | Transport & logistics | 2019 |
| Kelly Howe Surveyors Limited | Other services | 2007 |
| Kelly Kerry Haulage Ltd | Transport & logistics | 2022 |
| Kelly's Glass Limited | Other services | 1997 |
| Kelly's Property Development Limited | Construction | 2004 |
| Kellys Nails Limited | Other services | 2022 |
| Kellytots Ltd | Health & social care | 2025 |
| Kembeh Ltd | Wholesale & retail | 2026 |
| Kemp Investments Ltd | Real estate | 2000 |
| Kempsey Enterprise Limited | Professional & scientific | 2020 |
| Kenchez Limited | Other services | 2009 |
| Kenchez Three Limited | Other services | 2012 |
| Kendol Ltd | Information & communication | 2023 |
| Kenmaris Ltd | Hospitality | 2023 |
| Kennedy 1962 Limited | Extraterritorial | 2013 |
| Kenneth Jones Legal Limited | Professional & scientific | 2013 |
| Kennexus Ltd | Information & communication | 2022 |
| Kenport Investments Limited | Real estate | 1944 |
| Kensington Enterprise Holdings (UK) Limited | Health & social care | 2010 |
| Kensington Square Will Writers Limited | Financial services | 2012 |
| Kensington Stratton Group Ltd | Real estate | 2026 |
| Kentrome (Lysways Street) Limited | Real estate | 2014 |
| Kenworth H & V Products Limited | Other services | 1984 |
| Kerala Ruchi Ltd | Hospitality | 2025 |
| Keran Trading Limited | Wholesale & retail | 2023 |
| Kerpic Ltd | Professional & scientific | 2023 |
| Kerste Holdings Limited | Real estate | 2008 |
| Keskas Trans Ltd | Transport & logistics | 2017 |
| Kespar Engineering Limited | Manufacturing | 1993 |
| Kestrel Kitchens Ltd | Financial services | 2024 |
| Kev's Tyres Limited | Wholesale & retail | 2014 |
| Kevin & Sebastian Ltd | Transport & logistics | 2025 |
| Kevin R Twigger & Associates Limited | Professional & scientific | 2005 |
| Kevin Tech Ltd | Wholesale & retail | 2026 |
| Kevin Woodhouse Engineering Ltd | Manufacturing | 2019 |
| Kevinsh Food & Wine Ltd | Wholesale & retail | 2023 |
| Kews Construction Ltd | Construction | 2015 |
| Kewstoke Properties Ltd | Real estate | 2002 |
| Key Ceramics Ltd | Health & social care | 2013 |
| Key UK Property Ltd | Real estate | 2024 |
| KEY2FUTURESHOUSINGGROUP Ltd | Real estate | 2026 |
| Keycore Properties Ltd | Real estate | 2026 |
| Keygage & Morston Limited | Information & communication | 2024 |
| Keyhome Properties Limited | Real estate | 2025 |
| Keystart Finance Limited | Financial services | 2026 |
| Keystone Asset Protection Unlimited | Professional & scientific | 2013 |
| Keystone UK Property Limited | Real estate | 2025 |
| Keystone Wealth and Trust Solutions Unlimited | Professional & scientific | 2013 |
| Keyuntro Ltd | Administrative & support | 2019 |
| Keyway Consulting Limited | Information & communication | 2007 |
| KF Alliance Holdings Ltd | Real estate | 2013 |
| KF Publishing Ltd | Information & communication | 2013 |
| KFA Holdings Limited | Financial services | 2025 |
| KFA Hospitality Limited | Administrative & support | 2025 |
| Kfro Limited | Transport & logistics | 2018 |
| KG and HJ Bailey Hair Limited | Other services | 2008 |
| KG Bugaboo Logistic Ltd | Transport & logistics | 2018 |
| KG Business Limited | Professional & scientific | 2017 |
| KG Business Process Improvement Limited | Information & communication | 2014 |
| KGC Group Ltd | Construction | 2023 |
| KGF Properties Limited | Real estate | 2024 |
| KGH Group Ltd | Hospitality | 2025 |
| KGH Property Ltd | Real estate | 2022 |
| KGJ Management Services Limited | Administrative & support | 2011 |
| KGK General Ltd | Wholesale & retail | 2022 |
| KH Abraham Ltd | Health & social care | 2013 |
| KH Housing Ltd | Hospitality | 2017 |
| KH Residential Limited | Real estate | 2024 |
| KH Structural Services Limited | Professional & scientific | 2022 |
| Khaanzi Store 1 Ltd | Wholesale & retail | 2025 |
| Khaawaja Stores Ltd | Wholesale & retail | 2026 |
| Khadka Brothers Limited | Real estate | 2024 |
| Khaild's Cafe & Lounge Limited | Hospitality | 2024 |
| Khaira Services Ltd | Wholesale & retail | 2021 |
| Khakh's Transport Ltd | Transport & logistics | 2026 |
| Khalas Enterprise Limited | Wholesale & retail | 2026 |
| Khalsa Bathrooms DIY Ltd | Construction | 2021 |
| Khalsa Commercial Ltd | Real estate | 2026 |
| Khalsa Consulting Ltd | Professional & scientific | 2026 |