| LJB Global Limited | Professional & scientific | 2024 |
| LJC Social Limited | Arts & recreation | 2025 |
| LJF Creative Company Ltd | Professional & scientific | 2017 |
| Ljgreenhalgh Limited | Real estate | 2017 |
| LJT Management Ltd | Real estate | 2025 |
| Lkpharma Ltd | Wholesale & retail | 2023 |
| Llamisi Ltd | Professional & scientific | 2025 |
| Llys Bryn Traeth Management Limited | Households | 2007 |
| LM Agents Ltd | Wholesale & retail | 2022 |
| Loading Level One Ltd | Information & communication | 2023 |
| Local DOT Shopping Limited | Wholesale & retail | 2019 |
| Locogame Ltd | Information & communication | 2016 |
| Locometric Limited | Information & communication | 2012 |
| Locopharma Limited | Health & social care | 2021 |
| Locum TEH Ltd | Wholesale & retail | 2022 |
| Locumsight Ltd | Wholesale & retail | 2024 |
| LOD Consultancy Limited | Health & social care | 2018 |
| Lodgemoor Properties Ltd | Real estate | 2025 |
| Lodhi Associates Limited | Health & social care | 2004 |
| London App Studio Ltd | Information & communication | 2021 |
| Longdendale Construction Limited | Construction | 1988 |
| Longeaves Capital Partners Limited | Financial services | 2024 |
| Longview Court Management Limited | Households | 1998 |
| Longwood Mill Developments Ltd | Construction | 2024 |
| Lorac Clinical Pharmacy Services Limited | Information & communication | 1996 |
| Lore Construction Services Ltd | Construction | 2020 |
| Lounge 66 Limited | Hospitality | 2019 |
| Lovatt Holdings Limited | Professional & scientific | 1996 |
| Love Beauty Cheshire Ltd | Other services | 2024 |
| Love Hair (NW) Limited | Other services | 2014 |
| Love Motors (Manchester) Limited | Wholesale & retail | 2021 |
| Loved by AMA Ltd | Health & social care | 2024 |
| LOW Carbon Trader Ltd | Extraterritorial | 2021 |
| Lowco Power Limited | Construction | 2026 |
| Lowerhouse Green Management Company Limited | Real estate | 2018 |
| Lowry Capital Holdings Limited | Financial services | 2025 |
| Lowry Capital Limited | Financial services | 2006 |
| Loxden Limited | Manufacturing | 2025 |
| LRA Properties Limited | Extraterritorial | 2016 |
| LSB Construction Limited | Construction | 2016 |
| Lscldn Ltd | Arts & recreation | 2020 |
| LSH Aerospace Ltd | Manufacturing | 2018 |
| LSW Communications Ltd | Professional & scientific | 2026 |
| Ltmm Design Limited | Manufacturing | 2021 |
| Lucky Investor Limited | Construction | 2013 |
| Luke Bagwell (Holding) Ltd | Financial services | 2026 |
| Luke Bagwell Ltd | Wholesale & retail | 2023 |
| Lulu and Sons Ltd | Wholesale & retail | 2016 |
| Lulu's @ Limited | Hospitality | 2021 |
| Lulu's Kitchen Ltd | Administrative & support | 2016 |
| Lumen Capital Partners Limited | Financial services | 2023 |
| Lumina Imaging Limited | Health & social care | 2024 |
| Lummis Holdings Ltd | Financial services | 2025 |
| Lumos Capital Ltd | Financial services | 2023 |
| Lusty Properties Limited | Real estate | 2024 |
| Lyallpur Locum Limited | Professional & scientific | 2017 |
| Lyme View Properties Ltd | Manufacturing | 2015 |
| Lymehurst Management Limited | Households | 1988 |
| Lymo Motor Trade Limited | Transport & logistics | 2023 |
| LZA Pharma Limited | Manufacturing | 2025 |
| M & a Housing Limited | Real estate | 2019 |
| M & L Hair Company Limited | Other services | 2024 |
| M & N Properties (Anglesey) Limited | Real estate | 2019 |
| M & S Professionals Ltd | Health & social care | 2012 |
| M & S Contract Services Limited | Administrative & support | 1999 |
| M and I Services Limited | Health & social care | 2017 |
| M F Properties Manchester Ltd | Real estate | 2015 |
| M I Ahmed Ltd | Health & social care | 2024 |
| M I Contracts Limited | Construction | 2010 |
| M J & R Civils & Utilities Ltd | Construction | 2015 |
| M Mahawish Ltd | Wholesale & retail | 2021 |
| M Mansions Ltd | Real estate | 2026 |
| M Mortgages Ltd | Financial services | 2022 |
| M Wilson Consultancy Ltd | Information & communication | 2025 |
| M Z Media Production Ltd | Information & communication | 2014 |
| M&E Constable Consulting Ltd | Information & communication | 2025 |
| M&H Property Management (Northwest) Limited | Real estate | 2017 |
| M&L Property Ventures Ltd | Real estate | 2026 |
| M&M Contract Services Limited | Construction | 2024 |
| M&M Technologies Ltd | Information & communication | 2025 |
| M'N'G Designs Limited | Information & communication | 1985 |
| M-Hance Group Limited | Professional & scientific | 2010 |
| M-Hance Limited | Information & communication | 1978 |
| M-T Hairdresser Ltd | Other services | 2020 |
| M. Holmes Electrical Ltd | Information & communication | 2013 |
| M. Holt Manchester Property Limited | Real estate | 2013 |
| M. K Hussain Ltd | Health & social care | 2023 |
| M.A.B Electrics Ltd | Construction | 2022 |
| M.A.C. Solutions (UK) Limited | Information & communication | 1999 |
| M.A.G Steel Services Limited | Manufacturing | 2017 |
| M.A.P Design Solutions Limited | Professional & scientific | 2011 |
| M.C. Digital Recruitment Ltd | Administrative & support | 2021 |
| M.D.F Global Limited | Professional & scientific | 2014 |
| M.H Smile Limited | Health & social care | 2013 |
| M.H. Property and Investments Limited | Real estate | 2024 |
| M.I.A City Properties Ltd | Other services | 2021 |
| M.I.S Logistic Ltd | Transport & logistics | 2023 |
| M.J.C. Agencies Limited | Wholesale & retail | 2014 |
| M/C Kral Crane and Platform Ltd | Other services | 2023 |
| M1 Driving School Ltd | Education | 2026 |