| Linpac Europe Limited | Professional & scientific | 2011 |
| Linpac Finance Limited | Professional & scientific | 1975 |
| Linpac Finco Ltd | Financial services | 2020 |
| Linpac Group Holdings Limited | Professional & scientific | 1960 |
| Linpac Group Limited | Professional & scientific | 2003 |
| Linpac Metal Packaging Limited | Manufacturing | 1959 |
| Linpac Packaging China Holdings Limited | Professional & scientific | 2006 |
| Linpac Packaging Limited | Manufacturing | 1969 |
| Linpac Senior Holdings Limited | Professional & scientific | 2009 |
| Lisa Parkinson Media Makeup Ltd | Other services | 2016 |
| Lister House Ventures Ltd | Manufacturing | 2019 |
| Little Dream Makers Ltd | Health & social care | 2025 |
| Little Fishes Hemsworth Ltd | Hospitality | 2023 |
| Little Robins Daycare Ltd | Health & social care | 2026 |
| Little Saas Co Ltd | Information & communication | 2025 |
| Little Seasons Ltd | Wholesale & retail | 2023 |
| Little Wheels 2025 Ltd | Wholesale & retail | 2025 |
| LIZ Health Tech Ltd | Information & communication | 2025 |
| LJ & Keat Properties Limited | Real estate | 2014 |
| LJB Investments Ltd | Financial services | 2023 |
| Ljdm Properties Ltd | Real estate | 2025 |
| LK22DESIGNS Limited | Wholesale & retail | 2025 |
| Lkbf Property's Ltd | Real estate | 2022 |
| LMA Mortgages Ltd | Financial services | 2024 |
| LMC Civils Limited | Construction | 2023 |
| Lmcsolar Ltd | Construction | 2023 |
| LMM Investments Limited | Real estate | 2022 |
| LMS & Sons Ltd | Hospitality | 2024 |
| LMU Counselling & Massage Therapy Ltd | Health & social care | 2022 |
| LNB Property Management Ltd | Real estate | 2025 |
| Loan Corporation Ltd | Wholesale & retail | 2020 |
| Lockwood Pontefract Ltd | Hospitality | 2023 |
| Lofthouse & Co (Pontefract) Limited | Professional & scientific | 2008 |
| Logic Property Services Limited | Real estate | 2011 |
| Loma Creative Limited | Professional & scientific | 2023 |
| Loma Life Ltd | Information & communication | 2025 |
| Long Life Cover Ltd | Financial services | 2014 |
| Longevity Matters Ltd | Health & social care | 2025 |
| Longviews Properties CH Ltd | Health & social care | 2020 |
| LOS Amigos Ltd | Hospitality | 2025 |
| Loss Books Ltd | Information & communication | 2014 |
| Lost Boys Barbershop Ltd | Other services | 2022 |
| Lotus Garden Pontefract Ltd | Hospitality | 2024 |
| Louise Coughlin Limited | Health & social care | 2013 |
| Love Churros Ltd | Hospitality | 2024 |
| Love Pulses Ltd | Information & communication | 2026 |
| LOVECLOTHING4 Limited | Wholesale & retail | 2018 |
| LP Unified Management Limited | Real estate | 2020 |
| Lpspecialistservices Ltd | Transport & logistics | 2026 |
| LT Apartments Limited | Hospitality | 2023 |
| LTL Utilities Ltd | Construction | 2026 |
| LTS Fabrications Ltd | Manufacturing | 2025 |
| Lucky Horsefair Ltd | Hospitality | 2025 |
| Lucky WF8 Limited | Hospitality | 2022 |
| Luckywok Ltd | Hospitality | 2025 |
| Luella Homes Ltd | Construction | 2024 |
| Lumb Construction Limited | Construction | 2023 |
| Lumbs GAS Ltd | Wholesale & retail | 2025 |
| Lumbs Limited | Wholesale & retail | 2006 |
| Lumesatyic Limited | Professional & scientific | 2025 |
| Lumieredm Ltd | Health & social care | 2025 |
| Lumina Stone UK Ltd | Wholesale & retail | 2024 |
| Lumineur Ltd | Information & communication | 2025 |
| Luminous Lounge Ltd | Other services | 2024 |
| Lunn’S Deliverie’S Ltd | Transport & logistics | 2025 |
| Luxe Medical Surgery Limited | Health & social care | 2019 |
| Luxor Gate Ltd | Real estate | 2025 |
| Luxxnailsbar Ltd | Other services | 2023 |
| LVN Automotive Ltd | Wholesale & retail | 2026 |
| LVS Jointing Ltd | Construction | 2026 |
| Lynx Leisure Limited | Real estate | 1984 |
| M & KD Property Ltd | Real estate | 2026 |
| M Axxcess Limited | Other services | 2025 |
| M Beaumont (Ackworth) Joinery & Building Services Ltd | Construction | 2021 |
| M C Electrical (Leeds) Limited | Construction | 2009 |
| M Darlison Limited | Professional & scientific | 2003 |
| M F C Properties Limited | Real estate | 2019 |
| M G Leary Butchers Limited | Wholesale & retail | 2023 |
| M J C Pontefract Limited | Hospitality | 2022 |
| M J Jeavons Ltd | Construction | 2003 |
| M R Cawthorn of Pontefract Ltd | Professional & scientific | 2016 |
| M Stead Construction Ltd | Construction | 2020 |
| M Stevenson Property Ltd | Real estate | 2024 |
| M&F Takeaway Ltd | Hospitality | 2024 |
| M&H Attractions Ltd | Administrative & support | 2026 |
| M&L Takeaway Ltd | Hospitality | 2024 |
| M&T Trading Ltd | Wholesale & retail | 2026 |
| M. Dunnett Limited | Construction | 2003 |
| M.A.W. Driving Services Ltd | Transport & logistics | 2009 |
| M.J. Brook Ltd | Transport & logistics | 2008 |
| M.S. Kitchens & Bedrooms Limited | Manufacturing | 1999 |
| M.T.B Detail and Shine Ltd | Administrative & support | 2026 |
| M2M Worldwide Ltd | Extraterritorial | 2023 |
| M3W Holdings Limited | Financial services | 2019 |
| M3W Investments Limited | Real estate | 2019 |
| M44AAN Properties Ltd | Real estate | 2018 |
| MAC Venues Limited | Hospitality | 2022 |
| Mac&Mar Ltd | Transport & logistics | 2024 |
| Macauley Homes Limited | Construction | 2004 |
| MACDRIVERHIRE25 Ltd | Transport & logistics | 2025 |