| Kamil Indian Kitchen Limited | Extraterritorial | 2019 |
| Kamila B Aesthetics Ltd | Other services | 2019 |
| Kamillion Ltd | Wholesale & retail | 2025 |
| Kamluc Limited | Health & social care | 2022 |
| Kamoa Limited | Professional & scientific | 2007 |
| Kamon Transport Ltd | Transport & logistics | 2024 |
| Kamsi Cleaning Limited | Administrative & support | 2025 |
| KAN Ventures Ltd | Professional & scientific | 2014 |
| Kanaru Ltd | Wholesale & retail | 2025 |
| Kanaru U.K Ltd | Wholesale & retail | 2026 |
| Kandan Cardiovascular Limited | Health & social care | 2020 |
| Kandha Garn Limited | Health & social care | 2025 |
| Kando Maintenance Limited | Administrative & support | 2016 |
| Kangaroo Bristol Limited | Wholesale & retail | 2017 |
| Kangna Limited | Hospitality | 2023 |
| Kanizojojo Limited | Administrative & support | 2013 |
| Kanojia Property Limited | Real estate | 2025 |
| Kanoma Ltd | Information & communication | 2020 |
| Kansai Kitchen Limited | Hospitality | 2022 |
| Kansu Ltd | Information & communication | 2022 |
| Kantion Media Ltd | Information & communication | 2025 |
| Kanyesh Limited | Health & social care | 2023 |
| Kanzelli ZK Ltd | Information & communication | 2023 |
| Kanzeon Ltd | Information & communication | 2022 |
| Kaolin Studio Ltd | Arts & recreation | 2023 |
| Kaotik Productions Ltd | Administrative & support | 2025 |
| KAP Investments Limited | Real estate | 2020 |
| Kapadiya Investment Ltd | Wholesale & retail | 2025 |
| Kapel Consulting Limited | Professional & scientific | 2025 |
| Kapel Systems Ltd | Professional & scientific | 2021 |
| Kapka Ltd | Administrative & support | 2017 |
| KAPODOKYA29 Limited | Hospitality | 2022 |
| Kaprods Ltd | Information & communication | 2018 |
| Kapsize Limited | Information & communication | 2018 |
| Kaptan Property Ltd | Real estate | 2020 |
| Kara Catering Ltd | Wholesale & retail | 2023 |
| Kara Leigh Ford Ceramics Ltd | Manufacturing | 2023 |
| Karadagli Limited | Hospitality | 2024 |
| Karakaya 29 Ltd | Hospitality | 2023 |
| Karakaya IS Ltd | Hospitality | 2026 |
| Karamouslis Dental Ltd | Health & social care | 2026 |
| Karann Ltd | Administrative & support | 2025 |
| Karatay Limited | Information & communication | 2019 |
| Karate Bristol Ltd | Wholesale & retail | 2026 |
| Karate for Inner City Kids (K.I.C.K) Ltd | Extraterritorial | 2025 |
| Karato Limited | Health & social care | 2023 |
| Karbix Ltd | Transport & logistics | 2026 |
| Karbonblack Ltd | Information & communication | 2017 |
| Karcent UK Limited | Wholesale & retail | 2021 |
| Kardeala Autocare Ltd | Wholesale & retail | 2015 |
| Karen Ashby Training Ltd | Administrative & support | 2010 |
| Karen Billing Hair and Beauty Bristol Limited | Other services | 2024 |
| Karen Black Consulting Ltd | Administrative & support | 2023 |
| Karen Buswell Design Limited | Professional & scientific | 2003 |
| Karen Millett Marketing Consultancy Limited | Professional & scientific | 2024 |
| Karhai & Kettle Ltd | Hospitality | 2025 |
| Karibu Limited | Health & social care | 2015 |
| Karic Associates Limited | Real estate | 1971 |
| Karis Copp Media Ltd | Information & communication | 2021 |
| Karl Wilson Limited | Arts & recreation | 2018 |
| Karl's Auto Repairs Service Ltd | Manufacturing | 2018 |
| Karlstewartenterprises Ltd | Wholesale & retail | 2019 |
| Karmatech Limited | Construction | 2016 |
| Karno Ltd | Information & communication | 2019 |
| Karol Lasota Limited | Transport & logistics | 2024 |
| Karoltransport Limited | Transport & logistics | 2016 |
| Karosh Limited | Administrative & support | 2010 |
| Karpvt Ltd | Information & communication | 2024 |
| Kartdavid Ltd | Professional & scientific | 2012 |
| Karteria Konsulting Limited | Professional & scientific | 2025 |
| Karthik Consultants Limited | Professional & scientific | 2011 |
| Kartografo Studio Limited | Information & communication | 2024 |
| Karwan Superstore 24/7 Ltd | Wholesale & retail | 2025 |
| Karys Properties Limited | Real estate | 2026 |
| KAS Co-Working Ltd | Administrative & support | 2024 |
| KAS Recruitment Ltd | Administrative & support | 2017 |
| Kasa Chiropractic Limited | Health & social care | 2012 |
| Kasa Properties Limited | Real estate | 2014 |
| Kasa Real Estate Ltd | Real estate | 2019 |
| KASA2 Ltd | Real estate | 2024 |
| Kasasagi Studios Ltd | Education | 2025 |
| Kasba Stores Ltd | Wholesale & retail | 2023 |
| Kascade Ltd | Information & communication | 2023 |
| Kash Arora Ltd | Wholesale & retail | 2025 |
| Kash Brown Consultant Ltd | Professional & scientific | 2026 |
| Kashmir Kebab House Ltd | Hospitality | 2025 |
| Kashmir Restaurant & Juice Bar Limited | Hospitality | 2022 |
| Kasinsky Ltd | Professional & scientific | 2016 |
| Kasius Consulting Limited | Professional & scientific | 2011 |
| Kasius Property Investments Ltd | Real estate | 2024 |
| Kasm Holdings Limited | Financial services | 2025 |
| Kasm Property Developments Limited | Construction | 2025 |
| Kasm Property Rentals Limited | Real estate | 2025 |
| Kassaarn Ltd | Hospitality | 2025 |
| Kastoria Limited | Administrative & support | 2010 |
| Kasuebe Limited | Extraterritorial | 2009 |
| KAT Haylock Ltd | Information & communication | 2026 |
| Kata Projects Ltd | Other services | 2026 |
| Katacan Ltd | Professional & scientific | 2022 |
| Katch Properties Limited | Real estate | 2024 |