| Kriss Garage Ltd | Wholesale & retail | 2024 |
| Kristiansen Property Solutions Ltd | Real estate | 2023 |
| Kristofer Business Consulting Ltd | Professional & scientific | 2026 |
| Kriva Financial Services Limited | Financial services | 2026 |
| Krixta Ltd | Health & social care | 2025 |
| Krjm Ltd | Professional & scientific | 2023 |
| KRL Estates Ltd | Real estate | 2021 |
| Krmé&Co Limited | Hospitality | 2025 |
| Krokodylik Ltd | Transport & logistics | 2018 |
| Kronic Bass Ltd | Arts & recreation | 2024 |
| Krono Partners Limited | Financial services | 2013 |
| Kronos Trans Ltd | Transport & logistics | 2024 |
| Kroo Descendants' Development (KDD) CIC | Hospitality | 2025 |
| Krooz Hole Management Limited | Households | 2018 |
| Krowka Limited | Wholesale & retail | 2025 |
| Kroymans UK Limited | Administrative & support | 2003 |
| KRR Transport Ltd | Transport & logistics | 2017 |
| KRS Bristol Limited | Construction | 2016 |
| KRS Plumbing & Heating Services Ltd | Construction | 2020 |
| KRT Freehold Limited | Households | 2019 |
| Krucible Limited | Information & communication | 2020 |
| Kruse Consulting Limited | Professional & scientific | 2001 |
| KRV Civils and Surfacing Ltd | Extraterritorial | 2025 |
| Krystal Kleen Ltd | Extraterritorial | 2021 |
| Kryterion Holdings Ltd | Financial services | 2026 |
| Krzysztof Zaleski Ltd | Construction | 2018 |
| KS Advisory Ltd | Professional & scientific | 2025 |
| KS Bristol Ltd | Wholesale & retail | 2022 |
| KS Clinical Solutions Ltd | Professional & scientific | 2025 |
| KS Consulting (UK) Ltd | Professional & scientific | 2014 |
| KS Development Group Ltd | Construction | 2018 |
| KS Krystal Silhouette Beauty Ltd | Other services | 2025 |
| KS Products Ltd | Professional & scientific | 2017 |
| KS Social Media Limited | Other services | 2021 |
| KS Swimming Services Limited | Health & social care | 2025 |
| KS Technical Consulting Ltd | Information & communication | 2022 |
| KSB Consulting Ltd | Information & communication | 2024 |
| KSC Digital Ltd | Professional & scientific | 2021 |
| KSG Training Services Limited | Construction | 2013 |
| KSG Vehicle Solutions Limited | Administrative & support | 2015 |
| Ksha Trading Ltd | Wholesale & retail | 2019 |
| Ksit Beta Ltd | Professional & scientific | 2010 |
| KSJ Lettings Ltd | Extraterritorial | 2023 |
| Kskv Pharma Ltd | Wholesale & retail | 2025 |
| KSM Investments Limited | Real estate | 2018 |
| KSN Estates Limited | Real estate | 2025 |
| Ksolves Ltd | Information & communication | 2026 |
| KSP Inns Ltd | Hospitality | 2025 |
| KSP Property Letting Ltd | Real estate | 2025 |
| KSR18 Ltd | Professional & scientific | 2018 |
| KSS Facilities Management Services Ltd | Administrative & support | 2019 |
| KSS Services Ltd | Other services | 2019 |
| KST Design & Contracting Limited | Wholesale & retail | 2022 |
| KSW Group Ltd | Professional & scientific | 2023 |
| Kswd Transport Ltd | Transport & logistics | 2021 |
| KT Cleaning (Bristol) Limited | Administrative & support | 2012 |
| KT Property Developments Limited | Construction | 2017 |
| KTJ Aesthetics Limited | Other services | 2023 |
| Ktkt Ltd | Wholesale & retail | 2017 |
| KTL Properties U.K. Ltd | Real estate | 2025 |
| KTT Gear Trolley Ltd | Wholesale & retail | 2024 |
| KTV Nails Limited | Other services | 2020 |
| Kuan & SON Restaurant Limited | Hospitality | 2008 |
| Kubera 3TLD Ltd | Real estate | 2024 |
| Kuberbhai Shivabhai Desai Trust Limited | Education | 2015 |
| Kubiak Creative Limited | Professional & scientific | 2003 |
| Kubla Limited | Information & communication | 2013 |
| Kubra Solutions Ltd | Real estate | 2024 |
| Kudacan Limited | Health & social care | 2018 |
| Kudan Limited | Information & communication | 2011 |
| Kuddoo Ltd | Extraterritorial | 2025 |
| Kudo Coach Ltd | Information & communication | 2025 |
| Kudos Catering Limited | Hospitality | 2023 |
| Kudos Performance Consulting Ltd | Professional & scientific | 2000 |
| KUI Prime Ltd | Wholesale & retail | 2025 |
| Kujali Care Ltd | Administrative & support | 2022 |
| Kujo Design & Build Limited | Construction | 2022 |
| Kujo Property Ltd | Real estate | 2025 |
| Kuka Real Estate Ltd | Construction | 2025 |
| Kukula Travel Ltd | Administrative & support | 2025 |
| Kulcha Entertainment Limited | Administrative & support | 2026 |
| Kulola Healthcare Limited | Health & social care | 2015 |
| Kulture Media Group Ltd | Information & communication | 2024 |
| Kumari Care Limited | Health & social care | 1997 |
| Kumari Properties Ltd | Real estate | 2025 |
| Kumba’S Hair and Beauty Ltd | Other services | 2026 |
| Kumfix Ltd | Construction | 2026 |
| Kumomo Ltd | Wholesale & retail | 2021 |
| Kumosaan Limited | Wholesale & retail | 2012 |
| Kumsar Properties Ltd | Real estate | 2023 |
| Kumud-Rajani Ltd | Hospitality | 2026 |
| KUN Fulfilment Ltd | Other services | 2024 |
| Kundun Limited | Information & communication | 2010 |
| Kundun Music Publishing Ltd | Information & communication | 2013 |
| Kuponya Therapies Limited | Other services | 2021 |
| KUR Investments Ltd | Real estate | 2025 |
| Kurasika Technologies Limited | Administrative & support | 2026 |
| Kurb 2 Refurb Limited | Wholesale & retail | 2025 |
| Kurd Barbers 1 Ltd | Other services | 2026 |
| Kurd Cutz Ltd | Other services | 2024 |