| Longevity Clinics Europe (UK) Limited | Professional & scientific | 2020 |
| Lonse Place Ltd | Hospitality | 2025 |
| Look + Listen Research Ltd | Information & communication | 2019 |
| Loopwalk Ltd | Information & communication | 2026 |
| Lord Corporate Associates Limited | Professional & scientific | 2001 |
| Lords & Sons Eco Solar Ltd | Construction | 2023 |
| Lords & Sons Properties Ltd | Real estate | 2022 |
| Lords Roofing & Sons Ltd | Construction | 2018 |
| Lorica Consulting Limited | Information & communication | 2021 |
| Lorna Clarkson Coaching Ltd | Professional & scientific | 2018 |
| Lost in Transit Limited | Arts & recreation | 2025 |
| Lotanex Limited | Health & social care | 2022 |
| LOU LOU Jewellery (Mansfield) Limited | Manufacturing | 2011 |
| Loundsley Green Community Trust | Arts & recreation | 2010 |
| Love Brewing Limited | Manufacturing | 2010 |
| Love Engineering Brothers Ltd | Professional & scientific | 2022 |
| Love TOO True Ltd | Wholesale & retail | 2014 |
| Lovely Car Company (UK) Limited | Wholesale & retail | 2015 |
| LOW Power Radio Association | Other services | 2006 |
| Lower Grove Lodge Ltd | Hospitality | 2024 |
| Lowes Catering Ltd | Hospitality | 2025 |
| Lowgates Motors Ltd. | Wholesale & retail | 2004 |
| Lowmoor Estates Limited | Extraterritorial | 2003 |
| Loxley Automotive Group Ltd | Wholesale & retail | 2026 |
| LPD Security & Electrical Limited | Other services | 2020 |
| LPE Properties Limited | Real estate | 2014 |
| Lpfh Ltd | Construction | 2019 |
| LPH Chiropody + Podiatry Ltd | Health & social care | 2019 |
| Lpowered Plumbing Ltd | Construction | 2025 |
| LR Investments Limited | Real estate | 2024 |
| LR Therapies Ltd | Health & social care | 2025 |
| LRA Holdings Limited | Professional & scientific | 2018 |
| LRG Security Europe Limited | Professional & scientific | 2013 |
| LRJ Asset Management Ltd | Real estate | 2012 |
| LRL International Limited | Wholesale & retail | 2004 |
| LS Jones Holdings Ltd | Wholesale & retail | 2020 |
| Ltek Systems Ltd | Manufacturing | 2014 |
| LTM Engineering & SON Ltd | Professional & scientific | 2026 |
| Lubricant Group Holdings Limited | Financial services | 2021 |
| Lucas Plumbing & GAS Ltd | Construction | 2025 |
| Lucchi Group Ltd | Financial services | 2025 |
| Lucian and Georgiana Transport Ltd | Transport & logistics | 2018 |
| Lucid Trading Strategy Limited | Financial services | 2025 |
| Lucinda White Consultants Limited | Administrative & support | 2015 |
| Lucky Leaf Limited | Hospitality | 2023 |
| Lucky Star Chesterfield Limited | Hospitality | 2018 |
| Lucy’S Vets Ltd | Professional & scientific | 2026 |
| Luke Oliver Electrical Services Limited | Construction | 2020 |
| Luko Property Ltd | Real estate | 2024 |
| Lukose Ltd | Wholesale & retail | 2023 |
| Lumar Consulting Services Ltd | Professional & scientific | 2022 |
| Lume Search Limited | Administrative & support | 2026 |
| Lumi Yachts Limited | Transport & logistics | 2023 |
| Luminous UK International Limited | Financial services | 2023 |
| Lumora Trading Ltd | Wholesale & retail | 2025 |
| Lune & Co. Studio Ltd | Professional & scientific | 2025 |
| Lunn Property Management Ltd | Real estate | 2026 |
| Lupusfillan Enterprise Limited | Households | 2025 |
| Lura Aesthetics Ltd | Other services | 2025 |
| Luso Trading (Leeds) Limited | Wholesale & retail | 2026 |
| Lutyens Court Management Limited | Real estate | 2011 |
| Luvilla Group Limited | Real estate | 2024 |
| Luxel Group Ltd | Other services | 2024 |
| Luxurious Leisure Rentals Ltd | Hospitality | 2026 |
| Luxury Artificial Grass Ltd | Administrative & support | 2017 |
| Luxus Supplements Ltd | Wholesale & retail | 2024 |
| Luxwill Ltd | Construction | 2024 |
| Luxx Interiors Ltd | Construction | 2025 |
| LV8 Rooms Ltd | Real estate | 2026 |
| LW Trading Limited | Hospitality | 2016 |
| LWG Designs Ltd | Wholesale & retail | 2024 |
| Lydia's of Market Street Ltd | Hospitality | 2026 |
| Lymelight Limited | Other services | 2017 |
| Lyne Shoes Ltd | Wholesale & retail | 2023 |
| Lynnic Associates Limited | Construction | 2007 |
| Lynthorpe Woodworks Limited | Construction | 2013 |
| Lyric Hotels Limited | Hospitality | 1990 |
| M & D Services (East Midlands) Ltd | Professional & scientific | 2018 |
| M & G Sobti Ltd | Real estate | 2012 |
| M & H Engineering Services Ltd | Professional & scientific | 2006 |
| M & J Products Limited | Manufacturing | 1999 |
| M & J Services (Chesterfield) Limited | Professional & scientific | 2007 |
| M & K Electronic Solutions Ltd | Manufacturing | 2012 |
| M & P Property Investments Ltd | Real estate | 2026 |
| M & R Gregory Properties Ltd | Real estate | 2026 |
| M a Bingham Fabrications Ltd. | Manufacturing | 2010 |
| M a Installations (Chesterfield) Limited | Construction | 2023 |
| M and C Management Ltd | Extraterritorial | 2016 |
| M and S Arable Limited | Agriculture & fishing | 2016 |
| M B Glass Holdings Limited | Administrative & support | 2015 |
| M Baha Decorators Ltd | Construction | 2025 |
| M D Stapleton Developments Limited | Construction | 2003 |
| M Freeman Limited | Administrative & support | 2019 |
| M Hobson and Sons Limited | Wholesale & retail | 2014 |
| M Holliday Engineering Ltd. | Mining & quarrying | 2016 |
| M I Electrical Ltd | Construction | 2018 |
| M L J Properties Chesterfield Limited | Real estate | 2019 |
| M Maison Ltd | Other services | 2025 |
| M Mount Ltd | Construction | 2025 |
| M Reeve Ltd | Construction | 2014 |