| Lockwoods Developments Limited | Real estate | 1970 |
| Locrian Ltd | Education | 2021 |
| Logik Ventures Ltd | Financial services | 2025 |
| Lomax Natural Radiance Ltd | Manufacturing | 2023 |
| London Tea & Fruits Ltd | Manufacturing | 2024 |
| Loop X Design Ltd | Professional & scientific | 2025 |
| Lost Till Found Ltd | Information & communication | 2026 |
| Lou&Mart Cake Heart Limited | Manufacturing | 2022 |
| Louella Homes Ltd | Real estate | 2023 |
| Louella Property Holdings Ltd | Real estate | 2024 |
| Love Beautiful Liverpool Ltd | Wholesale & retail | 2025 |
| Love House Events Limited | Arts & recreation | 2020 |
| Loveable Brogue Marketing Ltd | Professional & scientific | 2023 |
| LOW Slow & Dough Limited | Hospitality | 2018 |
| LP Strength Academy Limited | Arts & recreation | 2016 |
| Lube &Go Ltd | Wholesale & retail | 2025 |
| Lucky Garden Wallasey Ltd | Hospitality | 2026 |
| Lucky Plus Ltd | Hospitality | 2021 |
| Lulu Consultancy Ltd | Professional & scientific | 2023 |
| Luma Cleaning Ltd | Administrative & support | 2024 |
| Luma Group Holdings Ltd | Financial services | 2024 |
| Luma Rental Ltd | Real estate | 2024 |
| Lume PBM Limited | Health & social care | 2019 |
| Luminosodemoda Ltd | Wholesale & retail | 2025 |
| Lurexa Property Solutions Limited | Real estate | 2025 |
| Luthfa Tandoori Ltd | Hospitality | 2019 |
| Luxe & Lear Services Ltd | Administrative & support | 2025 |
| Luxe Lets Wirral Ltd | Real estate | 2024 |
| Luxeline Developments Ltd | Construction | 2025 |
| LW Beauty and Aesthetics Limited | Other services | 2023 |
| M a Bond Limited | Hospitality | 2023 |
| M Brookes Ventures Ltd | Education | 2026 |
| M C Bresnen Limited | Administrative & support | 2013 |
| M K Joinery (NW) Ltd | Construction | 2024 |
| MA Haulage Ltd | Transport & logistics | 2018 |
| Mackie MOO Limited | Education | 2016 |
| Magazine Lane Management Company Limited | Households | 2019 |
| Mailrite UK Ltd | Administrative & support | 2010 |
| Majoco Limited | Other services | 2020 |
| Makeawill (Wirral) Limited | Professional & scientific | 2015 |
| Makeup Magic Limited | Arts & recreation | 2025 |
| Mangal Limited | Other services | 2000 |
| Mangal Pharmacy Limited | Wholesale & retail | 2001 |
| Manha Wirral Limited | Hospitality | 2025 |
| Manmore Engineering Ltd. | Professional & scientific | 2013 |
| Manor Court (Irby) Management Company Limited | Real estate | 2001 |
| Manor Garden Centre Limited | Wholesale & retail | 2021 |
| Manor Mews (Wallasey) Limited | Extraterritorial | 2000 |
| Manor Wood Management Company Limited | Households | 1997 |
| MAP Restaurants Ltd | Administrative & support | 2017 |
| MAR Property Management Limited | Extraterritorial | 2019 |
| Marine Aerospace Consultants Ltd | Manufacturing | 2001 |
| Marine CH Ltd | Administrative & support | 2024 |
| Mark Jones Construction Ltd | Construction | 2023 |
| Mark Kennan Ltd | Professional & scientific | 2024 |
| Mark Lane Property Ltd | Real estate | 2024 |
| Mark P Hughes Ltd | Construction | 2020 |
| Mark Roberts Music Ltd | Information & communication | 2024 |
| Marsglobus Limited | Professional & scientific | 2015 |
| Martyn Green Limited | Real estate | 2014 |
| MAS Wirral Ltd | Hospitality | 2025 |
| Master Grill Limited | Wholesale & retail | 2010 |
| Matt Boston Property Ltd | Real estate | 2026 |
| Matthew Kenyon Engineering Services Limited | Manufacturing | 2011 |
| Mavela Limited | Real estate | 2015 |
| Mavela Management Limited | Real estate | 2010 |
| Maviay Ltd | Hospitality | 2023 |
| MAX Food Wallasy Limited | Hospitality | 2023 |
| MAX Life and Health & Fitness Limited | Other services | 2016 |
| MAX Web Solutions Limited | Information & communication | 2011 |
| Maximus Developments Ltd | Real estate | 2023 |
| Maybank Homes 34 Hamilton Square Limited | Real estate | 2019 |
| MB Building & Maintenance Ltd | Construction | 2024 |
| MBH Construction Merseyside Ltd | Construction | 2020 |
| Mccabe Training and Consultancy Limited | Professional & scientific | 2018 |
| Mcconnell Property Services Ltd | Real estate | 2025 |
| Mcconnell Property Solutions Limited | Real estate | 2023 |
| Mcdermott Hamilton Properties Ltd | Real estate | 2026 |
| Mcdonough Family Law Ltd | Professional & scientific | 2024 |
| Mcdr Holding Ltd | Real estate | 2021 |
| Mckee Neutral Ltd | Construction | 2023 |
| MD Wind Solutions Ltd | Professional & scientific | 2024 |
| MDA Party Wall Surveyors Limited | Professional & scientific | 2021 |
| MDA WNW Limited | Professional & scientific | 2024 |
| Mechanical & Electrical Aftercare Services Limited | Construction | 2018 |
| Mechanical Installations Ltd | Professional & scientific | 2025 |
| Meditech Merseyside Ltd | Wholesale & retail | 2018 |
| Mediterranean Lighthouse Consulting Ltd | Professional & scientific | 2023 |
| Megaeggz Ltd | Information & communication | 2021 |
| Meicacml Ltd | Construction | 2025 |
| Melcon Limited | Professional & scientific | 2026 |
| Melvin & Dean Recruitment Ltd. | Administrative & support | 2023 |
| Memory Frames & More Ltd | Arts & recreation | 2013 |
| MEP Technical Talent Ltd | Administrative & support | 2025 |
| MER Interiors Ltd | Construction | 2019 |
| MER Property Installations Ltd | Real estate | 2025 |
| Meridian Financial Modelling Ltd | Other services | 2026 |
| Meringue Ltd | Wholesale & retail | 2020 |
| Merriclean NW Ltd | Administrative & support | 2026 |
| Mersey Convenience Store Ltd | Administrative & support | 2016 |