| Kubiak Properties Ltd | Real estate | 2022 |
| Kubus Shop Ltd | Wholesale & retail | 2023 |
| Kucharczyk Investments Limited | Wholesale & retail | 2020 |
| Kudokiss Ltd | Wholesale & retail | 2022 |
| Kudrt Ltd | Real estate | 2026 |
| Kugel Rotary Services Ltd | Professional & scientific | 2016 |
| Kujai Holdings Ltd | Financial services | 2024 |
| Kuka Limited | Health & social care | 2013 |
| Kuku Global Ltd | Administrative & support | 2021 |
| Kuldip Chana Limited | Real estate | 2025 |
| Kulvinder Hari Executive Coaching Ltd | Other services | 2023 |
| Kumala Therapy Ltd | Education | 2024 |
| Kumar's Properties Limited | Real estate | 2018 |
| Kumaran Retail Limited | Wholesale & retail | 2026 |
| Kumar’S Catering Ltd | Hospitality | 2021 |
| Kungu Consulting Ltd | Professional & scientific | 2014 |
| Kuntuskitchen Limited | Hospitality | 2025 |
| Kupila Ltd | Health & social care | 2009 |
| Kura Consulting Limited | Professional & scientific | 2017 |
| Kurage Ltd | Wholesale & retail | 2025 |
| Kurb Lettings Ltd | Real estate | 2024 |
| Kurd Barbers Nottingham Limited | Other services | 2024 |
| Kurdish Sweets Ltd | Wholesale & retail | 2025 |
| Kurdish VEG Ltd | Agriculture & fishing | 2025 |
| Kures Handyman Services Ltd | Manufacturing | 2020 |
| Kureshi IT Limited | Wholesale & retail | 2026 |
| Kurl Legal Services Limited | Professional & scientific | 2019 |
| Kurly Panda Limited | Real estate | 2014 |
| Kurs OFF Licence Ltd | Wholesale & retail | 2023 |
| Kushi-Ya Limited | Hospitality | 2018 |
| Kustom Project Ltd | Transport & logistics | 2023 |
| Kustomremaps Ltd | Wholesale & retail | 2019 |
| Kutahya Tiles UK Ltd | Construction | 2018 |
| Kuudu Limited | Wholesale & retail | 2011 |
| Kuvitella Limited | Information & communication | 2021 |
| KV Group Limited | Hospitality | 2018 |
| Kvlm Broadcast Limited | Professional & scientific | 2023 |
| KW Associates Holdings Ltd | Financial services | 2025 |
| KW Cars Limited | Wholesale & retail | 2025 |
| KW Energy Consultants Ltd | Administrative & support | 2022 |
| KW Light Haulage Ltd | Transport & logistics | 2025 |
| KW Storage Ltd | Administrative & support | 2024 |
| KW Welding Ltd | Wholesale & retail | 2024 |
| KWA Properties Limited | Real estate | 2022 |
| Kwaibe Properties Ltd | Construction | 2019 |
| Kwan Chan Accounting Services Limited | Professional & scientific | 1994 |
| Kwashimo Enterprises Limited | Information & communication | 2024 |
| Kwconstructions Limited | Construction | 2025 |
| Kwedan Essentials Enterprise Limited | Other services | 2017 |
| Kwik Parts Ltd | Wholesale & retail | 2025 |
| Kwik Time Couriers Ltd | Transport & logistics | 2025 |
| Kwikshoplimited Ltd | Wholesale & retail | 2026 |
| Kwikstreamsolutions Ltd | Information & communication | 2024 |
| KWJ Consulting Limited | Professional & scientific | 2012 |
| KWS District Heating Limited | Construction | 2017 |
| KWT Glass & Glazing Limited | Construction | 2015 |
| Kybro Limited | Professional & scientific | 2021 |
| KYC Global Technologies (UK) Limited | Administrative & support | 2019 |
| Kydd Associates Limited | Construction | 2025 |
| Kyle Ryde Racing Ltd | Arts & recreation | 2018 |
| Kylite Limited | Public administration | 2022 |
| Kynaston Digital Media Limited | Information & communication | 2010 |
| Kyng Tyre Limited | Administrative & support | 2018 |
| Kyngswell Care Limited | Health & social care | 2026 |
| KYR Property Group Ltd | Real estate | 2025 |
| Kyvos Property Rental Company Limited | Real estate | 2018 |
| KYY Ltd | Transport & logistics | 2021 |
| KZ Campbell Ltd | Administrative & support | 2022 |
| KZS Clinic Limited | Health & social care | 2021 |
| L & a J Property Ltd | Real estate | 2021 |
| L & B Cree Opticians Ltd | Health & social care | 2007 |
| L & B Pelham Limited | Construction | 2024 |
| L & E Joiners and Kitchen Fitters Ltd | Construction | 2023 |
| L & E Landscaping and Grounds Services Ltd | Administrative & support | 2025 |
| L & J M Beevers & SON Limited | Wholesale & retail | 2002 |
| L & J Property Rental Ltd | Real estate | 2015 |
| L & JT Holdings Limited | Construction | 2020 |
| L & M Consultancy Limited | Professional & scientific | 2018 |
| L & N Support & Housing Ltd | Public administration | 2024 |
| L & S Autos Limited | Wholesale & retail | 2008 |
| L & S Maintenance Services Ltd | Construction | 2023 |
| L & W Consultancy Ltd | Professional & scientific | 2021 |
| L a Investment Midland Ltd | Real estate | 2025 |
| L a Spencer Construction Ltd | Construction | 2023 |
| L a Spencer Holdings Ltd | Administrative & support | 2023 |
| L a Steeplejacks Limited | Construction | 2006 |
| L a Willis Investments Limited | Real estate | 2025 |
| L a Windmill Consultancy Ltd | Health & social care | 2026 |
| L and G Events Ltd | Administrative & support | 2025 |
| L and V Global Investments Limited | Real estate | 2021 |
| L B Removals and Logistics Ltd | Transport & logistics | 2018 |
| L Bowman Holdings Limited | Financial services | 2024 |
| L C P Plumbing Limited | Construction | 2004 |
| L E Scaffolding Services Ltd | Construction | 2023 |
| L Evans Haulage Limited | Transport & logistics | 2018 |
| L Garner Electrical Ltd | Construction | 2020 |
| L H Carpentry & Renovations Ltd. | Construction | 2023 |
| L House RTM Company Limited | Households | 2026 |
| L Hull Industries Ltd | Wholesale & retail | 2022 |
| L Hursthouse ENG. Ltd. | Construction | 2014 |