| KJC Lettings Ltd | Real estate | 2020 |
| KJI Fabrications Ltd | Construction | 2022 |
| Kkrol Ltd | Construction | 2018 |
| KLA Support Limited | Professional & scientific | 2024 |
| KLM Transport Ltd | Transport & logistics | 2025 |
| KLP Metals Ltd. | Wholesale & retail | 2012 |
| KM Business Solutions Limited | Professional & scientific | 1999 |
| KM Stores BLY Ltd | Wholesale & retail | 2025 |
| KMK Hybrids Ltd | Wholesale & retail | 2025 |
| Kneeshaw Moffatt Ltd | Extraterritorial | 2018 |
| Kneeshaws 2018 Ltd | Professional & scientific | 2017 |
| Knight Hill Day Nursery Ltd | Health & social care | 2023 |
| Knight Sky Ecology Ltd | Professional & scientific | 2021 |
| Knight Sky Films Ltd | Information & communication | 2018 |
| Kodelo Capital Ltd | Administrative & support | 2024 |
| Kompass Education (UK) Limited | Professional & scientific | 2024 |
| Konnect Digital Limited | Information & communication | 2012 |
| Koop Hospitality Ltd | Hospitality | 2018 |
| Kotv Media Limited | Information & communication | 2020 |
| Kpmp Ltd | Hospitality | 2019 |
| Krasz Ltd | Wholesale & retail | 2025 |
| KRS Properties Investment Ltd | Real estate | 2018 |
| KSA Consulting Group Limited | Professional & scientific | 2017 |
| KTC Plumbing and Heating Limited | Construction | 2023 |
| KTL Property Limited | Real estate | 2023 |
| Kurdistan Shine Wash Ltd | Administrative & support | 2025 |
| KVN Prime Solutions Limited | Water & waste | 2025 |
| Kwick Bricks Ltd | Manufacturing | 2025 |
| Kycoda Ltd | Real estate | 2021 |
| Kyzzo Ltd | Wholesale & retail | 2025 |
| KZP Limited | Wholesale & retail | 2025 |
| L & a Stocks Limited | Wholesale & retail | 2012 |
| L C Timber Ltd | Wholesale & retail | 2026 |
| L H Corporations Ltd | Construction | 2024 |
| L H Educational Services Ltd | Other services | 2018 |
| L Hessey Engineering Limited | Manufacturing | 2014 |
| L J Wooly Plumbing and Heating Services Ltd | Construction | 2026 |
| L S Delivery Services Ltd | Transport & logistics | 2019 |
| L Smithson Limited | Construction | 2007 |
| L&C Projects Ltd | Construction | 2020 |
| L&E Contractors Ltd | Construction | 2022 |
| L&G Hair & Beauty Ltd | Other services | 2016 |
| L. Aherne Joinery Ltd | Construction | 2014 |
| L.Spencer Properties Ltd | Real estate | 2021 |
| LA Belle by Ibrahim Ltd | Wholesale & retail | 2024 |
| LA Sicilia Catering Ltd | Hospitality | 2020 |
| LA Zvezda Limited | Hospitality | 2021 |
| Ladies First Kettering Ltd | Arts & recreation | 2011 |
| Lady Lillian (GB) Tours Limited | Extraterritorial | 2022 |
| Laird of the MAC Ltd | Real estate | 2025 |
| Laithe ST Ltd | Real estate | 2024 |
| Lakeland Water Services Ltd | Professional & scientific | 2020 |
| Lakes Event Foods Ltd | Hospitality | 2019 |
| Lakeshore Drives and Patios Limited | Construction | 2020 |
| Lakeshore Property Ltd | Real estate | 2021 |
| LAN Networks Ltd | Information & communication | 2017 |
| Lancashire Bargain Workwear Ltd | Manufacturing | 2026 |
| Lancashire Board & Paper Co. Limited | Manufacturing | 1979 |
| Lancashire Bridal Alterations Limited | Other services | 2017 |
| Lancashire Business Advisers Ltd | Professional & scientific | 2019 |
| Lancashire Car Sales Ltd | Wholesale & retail | 2024 |
| Lancashire Care Services Ltd | Administrative & support | 2015 |
| Lancashire Care Support Limited | Health & social care | 2015 |
| Lancashire Carpets Limited | Wholesale & retail | 2003 |
| Lancashire Clockmakers Limited | Manufacturing | 2013 |
| Lancashire Coffee Ltd | Wholesale & retail | 2017 |
| Lancashire Commercial Vehicle Sales Ltd | Wholesale & retail | 2025 |
| Lancashire Educational Solutions CIC | Education | 2022 |
| Lancashire Fire and Safety Limited | Wholesale & retail | 2017 |
| Lancashire Groundcare Ltd | Administrative & support | 2018 |
| Lancashire Group Ltd | Construction | 2012 |
| Lancashire Halal Butchers Ltd | Wholesale & retail | 2019 |
| Lancashire Home Care Ltd | Public administration | 2023 |
| Lancashire Hotels Ltd | Hospitality | 2023 |
| Lancashire Lettings Ltd | Real estate | 2016 |
| Lancashire LPG 4U Limited | Wholesale & retail | 2020 |
| Lancashire Luxury Travel Ltd | Transport & logistics | 2017 |
| Lancashire Media Limited | Information & communication | 2021 |
| Lancashire Motor Company Limited | Wholesale & retail | 2024 |
| Lancashire People's Centre Ltd | Administrative & support | 2017 |
| Lancashire Properties Services Ltd | Households | 2021 |
| Lancashire Property Management Ltd | Real estate | 2018 |
| Lancashire Skip Hire Ltd | Water & waste | 2021 |
| Lancashire Steel Buildings Limited | Construction | 2011 |
| Lancashire Textiles Holdings Limited | Financial services | 2005 |
| Lancashire Textiles Limited | Manufacturing | 2001 |
| Lancashire Timber & Damp Limited | Construction | 2022 |
| Lancashire Tours Ltd | Transport & logistics | 2019 |
| Lancaster Homes (NW) Ltd | Real estate | 2017 |
| Lancaster Pubs Ltd | Health & social care | 2021 |
| Lancaster Renewable Consultancy Ltd | Construction | 2019 |
| Lancs and Yorks Sheds Ltd | Wholesale & retail | 2022 |
| Landbay Group 1 Limited | Financial services | 2025 |
| Landbay Group Limited | Real estate | 2024 |
| Landmark Burnley Limited | Real estate | 2017 |
| Landscape Engineering Holdings Limited | Construction | 2016 |
| Landscape Engineering Ltd. | Construction | 2000 |
| Landtech NW Ltd | Administrative & support | 2025 |
| Lane House Farm Developments Ltd | Real estate | 2018 |
| Lane House Farm Lettings Ltd | Hospitality | 2022 |