| Knee & Sports Orthopaedics Ltd | Health & social care | 2024 |
| Kneetechs Limited | Health & social care | 2023 |
| Knight Home Care Limited | Health & social care | 2020 |
| Knitting Jelly Limited | Information & communication | 2014 |
| Knotted Commerce Ltd | Information & communication | 2023 |
| Knowho Ltd | Administrative & support | 2018 |
| Knutsford Golf Club (Properties) Limited | Construction | 1960 |
| Kobe & Co. Creative Ltd | Professional & scientific | 2025 |
| Kolisi Beverage Brands Limited | Professional & scientific | 2023 |
| Kolysis Consulting Limited | Health & social care | 2025 |
| Koreaone Services Limited | Construction | 2014 |
| Kosuge Orthopaedics Ltd | Health & social care | 2018 |
| Kouser Plant Hire Limited | Administrative & support | 2024 |
| Kova Brands Ltd | Wholesale & retail | 2026 |
| KPB Enterprises Ltd | Real estate | 2026 |
| KPM Express Limited | Transport & logistics | 2014 |
| KPM Express Waste Limited | Transport & logistics | 2021 |
| KQ Developments Limited | Construction | 2024 |
| KR Desai Ltd | Health & social care | 2025 |
| Kraal Properties Limited | Real estate | 2019 |
| Kranthi Management Services Limited | Professional & scientific | 2025 |
| Kreative Kollective Ltd | Arts & recreation | 2019 |
| Krishna Henry Limited | Health & social care | 2021 |
| Krust Wilmslow Ltd | Hospitality | 2023 |
| KS Apollo Ltd | Education | 2020 |
| KS Marketing Limited | Professional & scientific | 2019 |
| KSE Consulting Limited | Professional & scientific | 2012 |
| KTB Prop Co Ltd | Construction | 2021 |
| KTB Transport Ltd | Transport & logistics | 2018 |
| Kumar Abhinav Limited | Health & social care | 2021 |
| KV Engineering Ltd | Professional & scientific | 2022 |
| KW Rooms Ltd | Hospitality | 2024 |
| KW Wilmslow Ltd | Hospitality | 2024 |
| KWM (Cheshire) Limited | Professional & scientific | 2024 |
| L & M Property Management Ltd | Real estate | 2015 |
| L & N Family Investments Limited | Professional & scientific | 2024 |
| L&M Transport & Logistics LLP | | 2022 |
| L.G.H. Financial Management Limited | Professional & scientific | 2006 |
| L.K.D Enterprises Limited | Wholesale & retail | 2021 |
| L.Y.R+D Limited | Professional & scientific | 2018 |
| LA Mgmt Ltd | Administrative & support | 2026 |
| LA Ventures California Ltd | Hospitality | 2023 |
| LA Ventures Restaurants Ltd | Hospitality | 2017 |
| LA Vera Ltd | Wholesale & retail | 2021 |
| LAB Health Limited | Health & social care | 2025 |
| Label Print & Packaging Services Limited | Manufacturing | 2018 |
| Labour Infrastructure Forum Limited | Information & communication | 2025 |
| Lacey Bridal Ltd. | Wholesale & retail | 2026 |
| Lacey Green Primary Academy | Education | 2011 |
| Lackcon Ltd | Construction | 2025 |
| Laco Food & Bistro Co. Ltd | Hospitality | 2025 |
| Ladson Chester Limited | Real estate | 2017 |
| Ladson Commercial Ltd | Construction | 2008 |
| Ladson Halifax Limited | Real estate | 2022 |
| Ladson Holdings Limited | Real estate | 2017 |
| Ladson Stockport 2 Limited | Construction | 2023 |
| Ladson Stockport Limited | Real estate | 2016 |
| Ladson Westbar Limited | Real estate | 2014 |
| Lady RND Ltd | Real estate | 2021 |
| Ladygo Taxi Ltd | Transport & logistics | 2024 |
| Ladygrove MJL Ltd | Health & social care | 2026 |
| Lagom Aesthetics Limited | Administrative & support | 2018 |
| Lakeland Ascents Ltd | Arts & recreation | 2026 |
| Lakeland Management Services LLP | | 2018 |
| Lakemont Investments Limited | Real estate | 2025 |
| Lalia Clinic Ltd | Health & social care | 2023 |
| Lalstone Properties Ltd | Financial services | 2025 |
| Lamba Trading Co. Limited | Real estate | 1967 |
| Lamjam Ltd | Real estate | 2025 |
| Lananashef Ltd | Health & social care | 2023 |
| Lanarkshire Bariatric Service Limited | Health & social care | 2021 |
| Lancashire Cardiac Imaging LLP | | 2016 |
| Lancashire Foot Surgery Limited | Health & social care | 2019 |
| Land and Lake Ltd | Extraterritorial | 2022 |
| Lanebridge (Mitre Capital) Limited Partnership | | 2007 |
| Lanes Construction Co. (Manchester) Limited | Construction | 1938 |
| Langdon Removals Limited | Transport & logistics | 1985 |
| Langricks Limited | Professional & scientific | 2009 |
| Langslow Properties Ltd | Real estate | 2026 |
| Languagility Ltd | Education | 2024 |
| Lanisca Limited | Professional & scientific | 2018 |
| Lantek Systems Limited | Information & communication | 2000 |
| Laodicea AD Mare Limited | Health & social care | 2023 |
| LAR Properties Limited | Real estate | 2025 |
| Lara Shemtob Limited | Health & social care | 2022 |
| Large Red 2 Limited | Real estate | 2026 |
| Larini Systems Limited | Wholesale & retail | 2003 |
| LAS Business Consulting Limited | Professional & scientific | 2023 |
| LAS Lajas Ltd | Professional & scientific | 2025 |
| Laser Sales UK Limited | Wholesale & retail | 2017 |
| Last DOT Content Ltd | Professional & scientific | 2017 |
| Lathom Grange Management Company Limited | Households | 2022 |
| Latitude (2) Limited | Real estate | 2021 |
| Latitude Drinks Limited | Manufacturing | 2020 |
| Latium Technologies Limited | Information & communication | 2022 |
| Launch Management Ltd | Professional & scientific | 2026 |
| Lauraeyi Ltd | Health & social care | 2024 |
| Laurel Expert Surveying Services Limited | Professional & scientific | 2022 |
| Laverick Project Management Limited | Professional & scientific | 2024 |
| Laville Capital Ltd | Wholesale & retail | 2025 |