| L D Baxter Catering & Hospitality Services Limited | Hospitality | 2025 |
| L Earnshaw Consulting Ltd | Information & communication | 2018 |
| L G Building Ltd | Construction | 2023 |
| L H Consultant Engineers Limited | Professional & scientific | 1990 |
| L J Cleaning Services (Yorkshire) Ltd | Administrative & support | 2025 |
| L Khan Events Ltd | Other services | 2022 |
| L L Interiors Ltd | Construction | 2020 |
| L M W Development Solutions Limited | Construction | 2016 |
| L P Aesthetics Limited | Health & social care | 2019 |
| L R H Projects Ltd | Professional & scientific | 2022 |
| L&H PUB Company Ltd | Hospitality | 2026 |
| L&J Flooring Limited | Construction | 2025 |
| L&K Health Limited | Health & social care | 2017 |
| L&K Pontefract Ltd | Hospitality | 2025 |
| L.Askin & Sons Ltd | Transport & logistics | 2022 |
| L.Nicholson Engineering Ltd | Professional & scientific | 2024 |
| L.R.S 22 Limited | Health & social care | 2022 |
| LA Classic Cars Ltd | Wholesale & retail | 2021 |
| LA Fleur Floristry Limited | Wholesale & retail | 2017 |
| LA Jawab Cafe Ltd | Hospitality | 2023 |
| LA Lloyd Consultants Ltd | Professional & scientific | 2023 |
| LA Marchant International Ltd | Real estate | 2018 |
| LA Medical Group Ltd | Health & social care | 2025 |
| LA Plastering Services Ltd | Construction | 2021 |
| LA Plumbing, Heating and GAS Services Limited | Construction | 2026 |
| LA Reveuse Lettings Ltd | Real estate | 2025 |
| LA Vaping Ltd | Other services | 2018 |
| Labaye Construction Services Ltd | Construction | 2026 |
| Labels by Judy Ltd | Wholesale & retail | 2010 |
| Labour Rooms (Huddersfield) Limited | Real estate | 1993 |
| Labtex Limited | Wholesale & retail | 2004 |
| LAC Limited | Professional & scientific | 2005 |
| Lacy Loop Limited | Manufacturing | 2025 |
| Lady Moss Ltd | Education | 2024 |
| Ladyford Mews Management Company Limited | Real estate | 2008 |
| LAF Group Ltd | Financial services | 2025 |
| LAH Property Services Ltd | Real estate | 2020 |
| Lahori Taste Ltd | Hospitality | 2014 |
| Lala Store Ltd | Wholesale & retail | 2024 |
| Lala's Restaurant Huddersfield Ltd | Hospitality | 2013 |
| Lalcroft Limited | Construction | 1994 |
| Lallier Group Limited | Professional & scientific | 2025 |
| Lamabi Limited | Professional & scientific | 2025 |
| Lambda Data Consulting Limited | Information & communication | 2016 |
| Lambert Housing LLP | | 2020 |
| Lambrou Consulting Limited | Information & communication | 2011 |
| Lamore Living Shops Ltd | Wholesale & retail | 2024 |
| Lancashire Kilts Limited | Extraterritorial | 2022 |
| Lancashirecall Limited | Wholesale & retail | 1999 |
| Lancaster Health Limited | Health & social care | 2025 |
| Lancereal Group Limited | Financial services | 2024 |
| Landmark & Co Properties Ltd | Real estate | 2021 |
| Landmark Chesterfields Limited | Manufacturing | 2021 |
| Landmark Surveyors Ltd | Real estate | 2007 |
| Lands House (Management Company) Limited | Households | 2019 |
| Landscape Creations Ltd | Administrative & support | 2002 |
| Langata Ambient Heating Solutions Limited | Construction | 2026 |
| Langewode Limited | Real estate | 2006 |
| Langfield Croft Farms Limited | Agriculture & fishing | 2022 |
| Langfield Investments Limited | Real estate | 2010 |
| Langhus Limited | Professional & scientific | 2017 |
| Langsett Consulting Ltd | Professional & scientific | 2015 |
| Languedoc Cottages Limited | Real estate | 1995 |
| Lanson Developments Limited | Wholesale & retail | 1996 |
| Lanson Estates Limited | Professional & scientific | 2000 |
| Laplace Labs Ltd | Information & communication | 2024 |
| Laraib Management Solution Ltd | Professional & scientific | 2016 |
| Largo Property Investments Limited | Real estate | 2016 |
| Larks Rest Farm Limited | Agriculture & fishing | 2008 |
| Larkspur Medical Services Limited | Health & social care | 2014 |
| Larryh Limited | Health & social care | 2018 |
| Larson Enterprises Ltd | Professional & scientific | 2021 |
| Larz Ltd | Real estate | 2017 |
| LAS Pharma Ltd | Health & social care | 2014 |
| Lasa Holdings Ltd | Real estate | 2023 |
| Lascelles Hall Cricket Club CIC | Arts & recreation | 2024 |
| Laser & Beauty World Limited | Other services | 2024 |
| Laser Battle Ltd | Arts & recreation | 2024 |
| Laser Business Services Ltd | Professional & scientific | 2022 |
| Laser Grinding (Italia) Limited | Extraterritorial | 1994 |
| Laser Group Holdings Ltd | Financial services | 2023 |
| Laser Lettings Ltd | Real estate | 2023 |
| Latham Jenkins Limited | Manufacturing | 1988 |
| Launchpad Stem Ltd | Professional & scientific | 2025 |
| Laura Butterfield Limited | Other services | 2016 |
| Lauralouise Ltd | Real estate | 2019 |
| Lauren’S Bakery Ltd | Wholesale & retail | 2025 |
| Lavicious Limited | Wholesale & retail | 2025 |
| Law Booksellers Ltd | Wholesale & retail | 2019 |
| Law Transport Ltd | Transport & logistics | 2020 |
| Lawford Electrical Limited | Construction | 2017 |
| Lawrence & Associates Coaching & Management Services Limited | Health & social care | 2013 |
| Lawrence Mews Management Co. Limited | Households | 1999 |
| Lawson Builders Limited | Construction | 2020 |
| Layden Solutions Ltd | Manufacturing | 2017 |
| Laymill Properties Limited | Administrative & support | 2017 |
| Layth Travels Ltd | Transport & logistics | 2024 |
| Lazarus Motors Ltd | Wholesale & retail | 2014 |
| Lazy Luxury UK Ltd | Wholesale & retail | 2023 |
| Lazysleep Ltd | Manufacturing | 2023 |