| Kraftlogix Limited | Professional & scientific | 2011 |
| Kreative Products Ltd | Wholesale & retail | 2024 |
| Krishna Hospitality Group Ltd | Professional & scientific | 2026 |
| Krush Brands UK Ltd | Wholesale & retail | 2024 |
| KS Food House Ltd | Hospitality | 2022 |
| KS Properties & Development Limited | Real estate | 2024 |
| Ks-Treaders PVT Ltd | Wholesale & retail | 2026 |
| KSB Logistics Limited | Transport & logistics | 2025 |
| KSC Sellers Ltd | Wholesale & retail | 2025 |
| Ksgr Solutions Limited | Professional & scientific | 2017 |
| Kshang Ltd | Hospitality | 2019 |
| KSL Remarketing Limited | Information & communication | 2018 |
| KSW Sports Wear Ltd | Administrative & support | 2022 |
| KTC Worldwide Limited | Wholesale & retail | 2024 |
| Kurdish Barbers Blade Ltd | Other services | 2025 |
| Kurdish Community Centre CIC | Other services | 2023 |
| Kurdistan Barber Private Ltd | Other services | 2020 |
| Kursi Healthcare Limited | Administrative & support | 2025 |
| Kusshaus Limited | Wholesale & retail | 2023 |
| Kutchenhaus Limited | Wholesale & retail | 2004 |
| Kwickill Pest Control Limited | Other services | 1985 |
| Kwik Parking Solutions Ltd | Administrative & support | 2019 |
| Kwik Stop Auto Centre Ltd | Wholesale & retail | 2024 |
| Kxjh Services Limited | Professional & scientific | 2025 |
| Kyme Property Development Ltd | Construction | 2026 |
| KZ Trade Ltd | Wholesale & retail | 2024 |
| L D Rigg Butchers Ltd | Wholesale & retail | 2026 |
| L J Dolan Ltd | Wholesale & retail | 2025 |
| L Miah Holdings Ltd | Professional & scientific | 2026 |
| L Shiel Ltd | Professional & scientific | 2015 |
| L T M Engineering Services Ltd | Manufacturing | 2006 |
| L X N Ltd | Information & communication | 2024 |
| L&L MC Ltd | Professional & scientific | 2025 |
| L&L Tuner Ltd | Wholesale & retail | 2020 |
| L-J & a Newell Services Ltd | Administrative & support | 2018 |
| L. Simons Leisure Limited | Administrative & support | 2002 |
| L.G Letting and Maintenance Ltd | Real estate | 2024 |
| L.K.N.G. International Products & Services Limited | Wholesale & retail | 2007 |
| L.P.D. Catering Ltd | Hospitality | 2022 |
| LA Cars Ltd | Wholesale & retail | 2024 |
| LA LA Tandoori Takeaway Limited | Hospitality | 2024 |
| LA La's Tandoori Ltd | Hospitality | 2026 |
| LA Scala (PVT) Ltd | Hospitality | 2019 |
| LA Strada Club Ltd | Hospitality | 2021 |
| LA Trading Online Limited | Wholesale & retail | 2020 |
| Laaldeenstudios Limited | Manufacturing | 2024 |
| Lablink Scientific Ltd | Wholesale & retail | 2008 |
| Lads Services Limited | Administrative & support | 2025 |
| Lady HQ Limited | Other services | 2021 |
| Lady Lyla Cosmetics Ltd | Other services | 2020 |
| LAF93 Ltd | Financial services | 2017 |
| Lagan Catering Trading Ltd | Arts & recreation | 2024 |
| Lagan Resturant Ltd | Hospitality | 2024 |
| Lahore Street Foods Ltd | Hospitality | 2025 |
| Lahori Nashta 1 Limited | Hospitality | 2026 |
| Lajpal Ltd | Wholesale & retail | 2022 |
| Lake District Mountain Guides Ltd | Education | 2025 |
| Lakenheath Limited | Construction | 2002 |
| Lakeside Environmental Waste Water Solutions Ltd | Construction | 2019 |
| Lakeside Retail Ltd | Wholesale & retail | 2023 |
| Lambstroll Limited | Administrative & support | 2019 |
| Lamhp Ltd | Information & communication | 2025 |
| Lami Transport Ltd | Transport & logistics | 2019 |
| Lamont Kitchens & Bedrooms Limited | Manufacturing | 2008 |
| Lana Clinic Ltd | Other services | 2024 |
| Lancashire & Yorkshire Properties Ltd | Real estate | 2019 |
| Lancashire Consultancy Ltd | Professional & scientific | 2021 |
| Lancashire Credit Cars Ltd | Wholesale & retail | 2026 |
| Lancashire Farm Dairies Limited | Manufacturing | 2012 |
| Lancashire Farm Group Limited | Financial services | 2025 |
| Lancashire Farm Holdings Ltd | Financial services | 2020 |
| Lancashire Grab Hire Limited | Agriculture & fishing | 2021 |
| Lancashire Law Ltd | Professional & scientific | 2025 |
| Lancashire Legal Ltd | Professional & scientific | 2022 |
| Lancashire Meat Co. Ltd | Wholesale & retail | 2015 |
| Lancashire Money Limited | Financial services | 2025 |
| Lancashire Property and Management Limited | Real estate | 2021 |
| Lancashire Specialist Coatings Limited | Professional & scientific | 2016 |
| Lancashire Traders Ltd | Wholesale & retail | 2024 |
| Lancs Enterprise Ltd | Construction | 2026 |
| Landscape by Design Northwest Limited | Administrative & support | 2017 |
| Language Empire Limited | Professional & scientific | 2005 |
| Lanstur Ltd | Other services | 2025 |
| Lapsurge Private Limited | Health & social care | 2016 |
| Laraib ALI Limited | Other services | 2024 |
| Larc Heating and Plumbing Limited | Construction | 2023 |
| Larch Electrical Solutions Limited | Construction | 2026 |
| Larkss Care & Recruitment Ltd | Health & social care | 2022 |
| Larm Limited | Real estate | 2025 |
| Laser by SK Ltd | Other services | 2023 |
| Lash Atelier Ltd | Other services | 2026 |
| Lash Doll Studio Ltd | Other services | 2026 |
| Last Minute Party Co Limited | Administrative & support | 2023 |
| Latham Marketing Limited | Professional & scientific | 2020 |
| Laurus Distribution Ltd | Wholesale & retail | 2021 |
| Laurus Foods Ltd | Wholesale & retail | 2020 |
| Lavish Beauty Lounge Manchester Limited | Other services | 2019 |
| Lavish Lilly Ltd | Wholesale & retail | 2022 |
| Lavish Linens Ltd | Manufacturing | 2024 |
| Law Boss Limited | Extraterritorial | 2018 |