| Laserweld Plastics Ltd. | Professional & scientific | 2017 |
| LD Networking Ltd | Professional & scientific | 2018 |
| Leabrook Lodge Limited | Administrative & support | 1991 |
| Learning for Hire Limited | Education | 2016 |
| Lees Chinese Takeaway Ltd | Hospitality | 2025 |
| Leigh Puppies Limited | Agriculture & fishing | 2021 |
| Leofrance Developments Ltd | Construction | 2015 |
| Leppard Prints Limited | Manufacturing | 2026 |
| LES Stephan Enterprises Limited | Professional & scientific | 2022 |
| Levi & Co Interiors Ltd | Construction | 2023 |
| Leviathan Plumbing and Heating Limited | Construction | 2020 |
| Lewis Roofing (2026) Limited | Construction | 2026 |
| LG3 Ltd | Information & communication | 2024 |
| Liar Liar Limited | Hospitality | 2017 |
| Librana Ltd | Hospitality | 2005 |
| Lifewave Limited | Arts & recreation | 2000 |
| Light House UK Candles Ltd | Manufacturing | 2021 |
| Light Steel Frame Manufacturing Ltd | Manufacturing | 2006 |
| Lightening Towers Limited | Health & social care | 2023 |
| Lightward Limited | Energy | 2014 |
| Lindstrand Aerospace Limited | Manufacturing | 2000 |
| Lindstrand Balloons Limited | Manufacturing | 2015 |
| Lindstrand Industries Ltd | Manufacturing | 2017 |
| Liviam Limited | Administrative & support | 2006 |
| Living Insight Therapy Limited | Health & social care | 2022 |
| Llansilin Tractors Ltd | Wholesale & retail | 2005 |
| Llanymynech Golf Club Trading Company Ltd | Hospitality | 2015 |
| Lledrod Farm Limited | Manufacturing | 2024 |
| Lleucu Sion Ltd | Arts & recreation | 2024 |
| Lloyd Change Management Limited | Professional & scientific | 2008 |
| Lloyd Packaging Limited | Administrative & support | 2006 |
| Lloyd Projects Property Ltd | Real estate | 2016 |
| Lloyd's (Animal) Feeds Limited | Manufacturing | 1964 |
| Lloyd's Animal Feeds (Organic) Limited | Wholesale & retail | 2007 |
| Lloyd's Animal Feeds (Western) Limited | Manufacturing | 1999 |
| Lloyds Animal Feeds (Piercebridge) Limited | Manufacturing | 2002 |
| Lloyds Animal Feeds (Solway) Limited | Extraterritorial | 2010 |
| Lloyds Free Range Limited | Agriculture & fishing | 2014 |
| Lloyds Haulage Limited | Transport & logistics | 2014 |
| Lloyds Lettings Limited | Real estate | 2017 |
| Lloyds Southern Sales Limited | Extraterritorial | 2016 |
| Lloyds Western Sales Limited | Extraterritorial | 2016 |
| Llwyn Road Management Company Ltd | Households | 2021 |
| Llwyntidmon Ltd | Health & social care | 2013 |
| Llynclys Free Range Limited | Agriculture & fishing | 2016 |
| Llys Land Limited | Extraterritorial | 2016 |
| LNK51 Limited | Wholesale & retail | 2017 |
| Lohas Fertiliser Ltd | Manufacturing | 2022 |
| Lohas Recycling Limited | Manufacturing | 2014 |
| Lower Berghill Holdings Ltd | Agriculture & fishing | 2019 |
| Lower House Equine Clinic LLP | | 2016 |
| Lowton Livery Limited | Professional & scientific | 2020 |
| LPD (Shropshire) Limited | Real estate | 2011 |
| Lpnut UK Ltd | Wholesale & retail | 2015 |
| LQ Spa & Golf Resorts Limited | Hospitality | 2021 |
| LR Cuisine Ltd | Hospitality | 2021 |
| LS Performance Parts Ltd | Wholesale & retail | 2018 |
| Lucky Star Oswestry Limited | Hospitality | 2024 |
| Luke's Limousines Ltd | Transport & logistics | 2020 |
| Lupus Security Limited | Administrative & support | 2024 |
| Lynette & James Ltd | Wholesale & retail | 2020 |
| M & D Transport (Wales) Ltd | Transport & logistics | 2012 |
| M a Commerce Group Ltd | Wholesale & retail | 2025 |
| M a Extance Limited | Arts & recreation | 2012 |
| M F G Procurement Limited | Information & communication | 2023 |
| M J Machinery Ltd | Manufacturing | 2019 |
| M N M Properties Limited | Real estate | 2004 |
| M ND B Ltd | Hospitality | 2026 |
| M&G West Coast Investments Ltd | Real estate | 2024 |
| M&R Chicos Limited | Hospitality | 2025 |
| M. Gough Properties Limited | Real estate | 1983 |
| M.A.D Cleaners Limited | Administrative & support | 2018 |
| M.K. Hayward Limited | Transport & logistics | 2008 |
| M.K.Properties (Shropshire) Ltd | Real estate | 2025 |
| M3 Engineering Ltd | Construction | 2025 |
| Maccall Property Holdings Ltd | Other services | 2017 |
| Maelor Feeds Limited | Wholesale & retail | 1989 |
| Maincrop Holdings Limited | Financial services | 2013 |
| Maincrop Potatoes East Limited | Wholesale & retail | 2014 |
| Maincrop Potatoes Limited | Wholesale & retail | 2009 |
| Maincrop Property Limited | Real estate | 2013 |
| MAJ Property Developments Limited | Construction | 2015 |
| Major Extensions Ltd | Other services | 2016 |
| Make Believe Architecture Ltd | Professional & scientific | 2026 |
| Make ME Cosy Ltd | Hospitality | 2018 |
| Makepeace Properties Ltd | Real estate | 2023 |
| Malcolm Lewis Developments Limited | Professional & scientific | 2002 |
| Malcolm Lewis Homes Ltd | Construction | 2014 |
| Malcolm Lewis Windows Ltd | Construction | 2024 |
| Managed Recruitment Solutions Ltd | Administrative & support | 2005 |
| Manford Accounting Ltd | Professional & scientific | 2024 |
| Manford Farm Contractors Limited | Agriculture & fishing | 2021 |
| Mannion Haulage Solutions Ltd | Transport & logistics | 2026 |
| Manor Fields Management Company Limited | Real estate | 2016 |
| Manorward Estate Limited | Real estate | 2017 |
| Mansbridge Project Management Limited | Extraterritorial | 2021 |
| Maona Cinema Ltd | Information & communication | 2024 |
| MAR Joinery and Building Service Ltd | Manufacturing | 2024 |
| Marches Oven Cleaning Ltd | Administrative & support | 2025 |
| Marcos Sportscars Ltd | Administrative & support | 1999 |