| Knee Specialists LLP | | 2009 |
| Kneqt Ltd | Information & communication | 2023 |
| Knife and Fork Cafe Ltd | Hospitality | 2022 |
| Knifton Property Limited | Real estate | 2025 |
| Knight and Leach Maintenance Limited | Construction | 2023 |
| Knight and Leach Plumbing Limited | Construction | 2019 |
| Knight and Leach Property Limited | Real estate | 2025 |
| Knight Bidco Limited | Financial services | 2023 |
| Knight Court Management Limited | Households | 2015 |
| Knight Crump Consulting Ltd. | Professional & scientific | 2015 |
| Knight Fleming Limited | Information & communication | 2011 |
| Knight Flooring Ltd | Construction | 2015 |
| Knight Management Group Ltd | Real estate | 2026 |
| Knight Midco 1 Limited | Financial services | 2023 |
| Knight Midco 2 Limited | Financial services | 2023 |
| Knight of NI Ltd | Information & communication | 2024 |
| Knight OUT Entertainment Ltd | Arts & recreation | 2026 |
| Knight Plumbing & Heating Bristol Ltd | Construction | 2019 |
| Knight Safety and Risk Management Limited | Professional & scientific | 2015 |
| Knight Services (South West) Ltd | Construction | 2018 |
| Knight Topco Limited | Financial services | 2023 |
| Knighton Contracts Ltd | Construction | 2012 |
| Knighton Property Services Ltd | Households | 2022 |
| Knightpride Limited | Real estate | 2009 |
| Knights Beekeeping Ltd | Manufacturing | 2021 |
| Knights Close Property Management Company Limited | Households | 1992 |
| Knights of Bristol Removals Ltd | Transport & logistics | 2023 |
| Knightsbridge International Investments Limited | Construction | 2013 |
| Knightsbridge Investment Trust Limited | Construction | 1984 |
| Knightsbridge JJD Development Limited | Construction | 2024 |
| Knightsbridge JJD South West Limited | Real estate | 2025 |
| Knightwood Property Management Limited | Households | 2000 |
| Knives Noise Worldwide Limited | Information & communication | 2025 |
| KNK Group Ltd | Financial services | 2023 |
| Knole Consulting Limited | Professional & scientific | 2006 |
| Knole Lane 104 Ltd | Real estate | 2026 |
| Knole Park Residents Limited | Households | 1979 |
| Knoll (Portishead) Management Company Limited | Households | 2014 |
| Knoll Court Sneyd Park (Management) Limited | Households | 1974 |
| Knollco | Professional & scientific | 2022 |
| Knorr-Bremse Systems for Commercial Vehicles Limited | Manufacturing | 1954 |
| Knovia Group Limited | Financial services | 2022 |
| Knovia Holdco Limited | Financial services | 2022 |
| Knovia Limited | Financial services | 2022 |
| Knovia Midco Limited | Financial services | 2022 |
| Know Your Worth AI Limited | Information & communication | 2025 |
| Knowing Earth Limited | Mining & quarrying | 2017 |
| Knowing What to DO Ltd | Education | 2013 |
| Knowle (Bristol) Angling Association Limited | Agriculture & fishing | 2003 |
| Knowle Barbars Ltd | Other services | 2026 |
| Knowle Constitutional Club CIC | Hospitality | 2024 |
| Knowle Food Savers Ltd | Wholesale & retail | 2025 |
| Knowle House Ltd | Real estate | 2019 |
| Knowle Road Limited | Households | 2007 |
| Knowle Valley Ltd | Wholesale & retail | 2024 |
| Knowle West Media Centre | Education | 2002 |
| Knowledge Ecosystems Limited | Information & communication | 2019 |
| Knowledge Empower C.I.C. | Education | 2024 |
| Knowledge Innovation and Growth in Education Group Limited | Education | 2024 |
| Knowledge Keepers Ltd | Education | 2024 |
| Knowledge Sharing Limited | Professional & scientific | 2010 |
| Knowledge Transfer Services (KTS) Ltd | Professional & scientific | 1999 |
| Known by US Limited | Information & communication | 2026 |
| Knoxie Limited | Wholesale & retail | 2024 |
| KNS Media Ltd | Wholesale & retail | 2025 |
| KNS Trans Ltd | Transport & logistics | 2018 |
| Knuckle Ltd | Real estate | 2023 |
| Knuckles Group Ltd | Manufacturing | 2025 |
| KNW Limited | Real estate | 2018 |
| KNW Management Limited | Real estate | 2021 |
| KO Genovese Ltd | Information & communication | 2026 |
| Koala Coffee Limited | Hospitality | 2025 |
| Koala Kreations Ltd | Wholesale & retail | 2021 |
| Koala Roofing Ltd | Construction | 2026 |
| Kobec Electrical Ltd | Construction | 2016 |
| Kobec Properties Limited | Households | 2023 |
| Kobi's Brothers Ltd | Health & social care | 2023 |
| Kobie Loyalty, Ltd | Information & communication | 2026 |
| Kochay Ltd | Administrative & support | 2023 |
| Kodachromeband Limited | Information & communication | 2025 |
| Kodah Business Automation Ltd | Information & communication | 2023 |
| Koddis Construction Limited | Construction | 2019 |
| Koddis Developements Limited | Real estate | 2023 |
| Kofenty Ltd | Wholesale & retail | 2025 |
| Kohli Bottle Store Ltd | Wholesale & retail | 2025 |
| KOI Collective Ltd | Wholesale & retail | 2025 |
| KOI Japan Ltd | Hospitality | 2022 |
| Koiecho Ltd | Professional & scientific | 2024 |
| Koja Consultants Ltd | Professional & scientific | 2025 |
| Koji Studio Ltd | Information & communication | 2026 |
| Koklass Ltd | Wholesale & retail | 2026 |
| Kokoni Productions Ltd | Administrative & support | 2007 |
| Kokoro Fitness Ltd | Arts & recreation | 2020 |
| Kola Adetu Hypnotherapy Ltd | Health & social care | 2024 |
| Kollektive.Io Ltd | Other services | 2018 |
| Koller Holdings Ltd | Real estate | 2020 |
| Kolorbond U.K. Limited | Construction | 2015 |
| Kome Studios Ltd | Other services | 2025 |
| Kommalapati Ltd | Real estate | 2009 |
| Kommol Limited | Administrative & support | 2010 |