| Krsa Properties Limited | Real estate | 2019 |
| Kruschtel-Kiste | Wholesale & retail | 2015 |
| Kryvanta Constructions Limited | Construction | 2026 |
| KS Cars Wakefield Ltd | Wholesale & retail | 2025 |
| KS Export Limited | Wholesale & retail | 2003 |
| KS Nutrition Experts Ltd | Extraterritorial | 2021 |
| KS Rise Ltd | Wholesale & retail | 2025 |
| KSX Group Limited | Financial services | 2026 |
| KSX Holdings Limited | Financial services | 2025 |
| KTS AG | Administrative & support | 2015 |
| Kubera Lakshmi Properties Limited | Real estate | 2025 |
| Kuberu Limited | Health & social care | 2015 |
| Kubus 82 Ltd | Wholesale & retail | 2024 |
| Kubus International Food Limited | Wholesale & retail | 2017 |
| Kujenst Ltd | Real estate | 2018 |
| Kultured Kreature Projects Ltd | Other services | 2025 |
| Kunfayaakun Ltd | Wholesale & retail | 2024 |
| Kurbani Transport Limited | Transport & logistics | 2013 |
| Kurdish Barbers Tingley Limited | Other services | 2024 |
| Kurdish Food Wakefield Limited | Hospitality | 2025 |
| KW Accounting Solutions Limited | Professional & scientific | 2021 |
| KW Haulage Limited | Transport & logistics | 2009 |
| Kwame D Ltd | Other services | 2020 |
| Kwkv Limited | Wholesale & retail | 2006 |
| KWS Trans Ltd | Transport & logistics | 2025 |
| Kwsb Resolve Limited | Professional & scientific | 2012 |
| KY Gynaecare Ltd | Health & social care | 2021 |
| Kynaston Consultancy Ltd | Administrative & support | 2024 |
| L & a Property Solutions Ltd | Real estate | 2024 |
| L & O Maintenance and Hospitality Ltd | Health & social care | 2016 |
| L and C Alderson Limited | Wholesale & retail | 2025 |
| L G Select Limited | Administrative & support | 2008 |
| L K Cleaning Consultancy Limited | Administrative & support | 2016 |
| L Parkinson Builders Limited | Construction | 2019 |
| L&G Flooring Limited | Construction | 2019 |
| L'Amour Interiors Ltd | Wholesale & retail | 2013 |
| L. C Civil Engineering Ltd | Construction | 2020 |
| L. J. & M. Refson Limited | Professional & scientific | 1945 |
| L.D Pipelines Ltd | Energy | 2013 |
| L.D. Smith & SON Limited | Wholesale & retail | 1955 |
| L.L Electrical & Building Management Services Ltd | Professional & scientific | 2025 |
| L.S Northern Media Ltd | Professional & scientific | 2022 |
| LA Chingada Tex-Mex Ltd | Hospitality | 2024 |
| LA Fortezza Limited | Hospitality | 2021 |
| LA Maison Food Ltd | Hospitality | 2025 |
| Laborema Software Limited | Information & communication | 2015 |
| Labyrinth Property Investments Ltd | Real estate | 2022 |
| LAC Property Development Ltd | Real estate | 2025 |
| Lace Construction Ltd | Construction | 2020 |
| Laceys Restaurant Limited | Hospitality | 2026 |
| Ladbroke Court Limited | Construction | 1983 |
| Ladlisa Limited | Information & communication | 2009 |
| LAE Property Investment Limited | Real estate | 2025 |
| LAG Property Limited | Real estate | 2026 |
| LAG Ventures Limited | Real estate | 2026 |
| Lagerhaus DER Natur Limited | Wholesale & retail | 2004 |
| Lagley Limited | Real estate | 2025 |
| Lakeside Bistro Ltd | Hospitality | 2023 |
| Lakeside Corporate Services Ltd | Professional & scientific | 2010 |
| Lakeside FS Ltd | Financial services | 2014 |
| Lakeside Independent Limited | Financial services | 2004 |
| Lakeside Investment Platform Ltd | Administrative & support | 2019 |
| Lakeside Probate Services Ltd | Financial services | 2013 |
| Lakeside Wakefield Holdings Limited | Other services | 2023 |
| Lakeside Wills Limited | Financial services | 2014 |
| LAL Consulting Limited | Professional & scientific | 2025 |
| LAL Property Group Ltd | Construction | 2025 |
| Lalazar Mini Market Limited | Wholesale & retail | 2025 |
| Lals Limited | Wholesale & retail | 2003 |
| LAM Communications Limited | Wholesale & retail | 2001 |
| Lamb Handbags Limited | Wholesale & retail | 2010 |
| Lamberts Landscaping & Driveways Ltd | Administrative & support | 2024 |
| Lamero Partners Limited | Administrative & support | 2026 |
| Laminar Solutions Ltd | Professional & scientific | 2020 |
| Lamthuy Ltd | Hospitality | 2025 |
| Land Restoration and Management Limited | Other services | 1997 |
| Landly Limited | Real estate | 2020 |
| Landmark Construction Consultants Limited | Professional & scientific | 2007 |
| Landscape Grass (Concrete) Limited | Wholesale & retail | 1974 |
| Landscape Media Limited | Information & communication | 2010 |
| Landsdowne Leasing Limited | Financial services | 2019 |
| Langon Limited | Wholesale & retail | 2016 |
| Lantern to English Ltd | Education | 2025 |
| LAR Leisure Limited | Hospitality | 2019 |
| Largent Landscapes Limited | Extraterritorial | 2018 |
| Lasaye Consulting Limited | Professional & scientific | 2017 |
| Laser Cleaning Experts Ltd | Other services | 2023 |
| Laser Luxxe Limited | Other services | 2021 |
| Laseraway B Ltd | Other services | 2025 |
| Laseraway L Ltd | Other services | 2025 |
| Laseraway Ltd | Other services | 2024 |
| Laseraway W Ltd | Other services | 2025 |
| Laseraway Wakefield Limited | Other services | 2021 |
| Laseraway Y Ltd | Other services | 2025 |
| Laserworx Wakefield Ltd | Other services | 2024 |
| LASH2LASH Limited | Other services | 2022 |
| Lashian Holdings Ltd | Information & communication | 2025 |
| Lasting Beauty Wakefield Ltd | Other services | 2016 |
| Lasting Change Psychotherapy Ltd | Health & social care | 2025 |
| Latino Quarter Bars Limited | Professional & scientific | 2005 |