| Konnectusa Ltd | Wholesale & retail | 2026 |
| KONNEKT365 Limited | Information & communication | 2017 |
| Konstant Express Ltd | Wholesale & retail | 2020 |
| Konverted Ltd | Professional & scientific | 2019 |
| Koobr Ltd | Information & communication | 2013 |
| Kool Catering Co Ltd | Hospitality | 2018 |
| Kool-Fix Limited | Construction | 2012 |
| Kooltravel Ltd | Transport & logistics | 2018 |
| Kordova Global Limited | Wholesale & retail | 2026 |
| Korsholm Limited | Professional & scientific | 2025 |
| Kortec Limited | Wholesale & retail | 2015 |
| Kortechsystems Ltd | Information & communication | 2018 |
| Korus Engineering Services Limited | Professional & scientific | 2006 |
| Kosta Trucking Ltd | Transport & logistics | 2019 |
| Kosztel Trans Ltd | Transport & logistics | 2018 |
| KP Specialist Ltd | Manufacturing | 2021 |
| KPA Consultancy Ltd | Professional & scientific | 2025 |
| Kphms Ltd | Information & communication | 2018 |
| KPL (Bathgate) Ltd | Real estate | 2023 |
| KPL (Queensferry) Ltd | Real estate | 2024 |
| KPS1 Ltd | Extraterritorial | 2026 |
| KR Accounting Services Limited | Professional & scientific | 2018 |
| KR Keys Ltd | Real estate | 2026 |
| KR Medacs Limited | Health & social care | 2012 |
| KR Properties (Derby) Ltd | Real estate | 2025 |
| KR Venture Group Ltd | Real estate | 2026 |
| KR3 Properties Limited | Real estate | 2022 |
| KRA Healthcare Ltd | Health & social care | 2017 |
| KRA Reserve Limited | Real estate | 2020 |
| Kraft HR Consulting Limited | Administrative & support | 2013 |
| Kraftd Developments Ltd | Construction | 2026 |
| Kraftd Group Ltd | Construction | 2024 |
| Krai Properties Ltd | Real estate | 2023 |
| Kraken Medical Ltd | Health & social care | 2020 |
| KRE Estate Ltd | Real estate | 2024 |
| Kreativ Studios Limited | Professional & scientific | 2023 |
| Kreative Orbit Limited | Wholesale & retail | 2017 |
| Krete Holding Company Ltd | Real estate | 2025 |
| Kris 4 Transport Ltd | Transport & logistics | 2016 |
| Kriss Haulage Ltd | Transport & logistics | 2016 |
| Kristy Wines Limited | Real estate | 1964 |
| Krixul Ltd | Information & communication | 2019 |
| Kriya Ventures Limited | Professional & scientific | 2023 |
| KRJ Training Services Ltd. | Professional & scientific | 2019 |
| KRM Technology UK Ltd | Information & communication | 2012 |
| Krms Properties Ltd | Real estate | 2026 |
| Krok-U SEM Transport Ltd | Transport & logistics | 2018 |
| KRS Property Holdings Ltd | Real estate | 2022 |
| Krupa Services Limited | Transport & logistics | 2024 |
| Krups HGV Ltd | Transport & logistics | 2023 |
| Krutak Ltd | Water & waste | 2018 |
| KRY Logic Limited | Information & communication | 2014 |
| Krytkl Creative Ltd | Information & communication | 2023 |
| Kryzdekor Limited | Construction | 2024 |
| KS Construction Derby Limited | Construction | 2025 |
| KS News Ltd | Wholesale & retail | 2012 |
| KS Online Sales Ltd | Wholesale & retail | 2025 |
| KS Randhawa Transport Limited | Transport & logistics | 2015 |
| KS Recruitment Limited | Administrative & support | 2024 |
| KS Resourcing Ltd | Administrative & support | 2021 |
| KSA Eco Holdings Ltd | Agriculture & fishing | 2021 |
| KSA Eco Partnerships Ltd | Agriculture & fishing | 2021 |
| KSD Consulting Ltd | Professional & scientific | 2018 |
| KSG Heating & Plumbing Ltd | Construction | 2022 |
| KSH Commercial Ltd | Real estate | 2025 |
| KSH Construction Ltd | Construction | 2023 |
| KSH Group Ltd | Financial services | 2026 |
| KSH Residential Ltd | Real estate | 2025 |
| KSK Engineering Ltd | Construction | 2025 |
| KSM Deliveries Limited | Transport & logistics | 2025 |
| KSN Transport Ltd | Transport & logistics | 2020 |
| KSR Housing Ltd | Real estate | 2021 |
| KSU Ltd | Professional & scientific | 2025 |
| Ktcivils Ltd | Water & waste | 2014 |
| Ktco Management Ltd | Arts & recreation | 2025 |
| Kteq Limited | Professional & scientific | 2011 |
| KTH Technical Services Ltd | Professional & scientific | 2019 |
| Ktpm Limited | Real estate | 2016 |
| Ktpz Flavas Ltd | Wholesale & retail | 2023 |
| KTS Builder Limited | Construction | 2012 |
| Kuba Labs Limited | Information & communication | 2026 |
| Kube Investments Ltd | Construction | 2013 |
| Kubo Wellness Ltd | Health & social care | 2025 |
| Kubush Food Store Ltd | Other services | 2023 |
| Kuchar Transport Ltd | Transport & logistics | 2016 |
| Kudeville Consultancy Limited | Professional & scientific | 2025 |
| Kudos Beauty Limited | Other services | 2012 |
| Kugapriya UK Limited | Hospitality | 2019 |
| Kuka Recruitment Services Limited | Professional & scientific | 2001 |
| Kukkii Ltd | Hospitality | 2025 |
| Kula Technologies Limited | Information & communication | 2021 |
| Kular GAS & Heating Limited | Construction | 2017 |
| Kular Property Limited | Real estate | 2022 |
| Kuleena Group Ltd | Financial services | 2025 |
| Kuleena Holdings Ltd | Real estate | 2024 |
| Kulraj Transport Ltd | Transport & logistics | 2025 |
| Kumasi Timber Ltd | Agriculture & fishing | 2026 |
| Kumpukos Ltd | Wholesale & retail | 2025 |
| Kunolis Ltd | Transport & logistics | 2024 |
| Kurd Association of Derby (K.A.O.D) Ltd | Other services | 2020 |