| Lima Engineering Holdings Ltd | Financial services | 2022 |
| Limes Hair Design Belper Ltd | Other services | 2016 |
| Limitless Facades Ltd | Construction | 2025 |
| Linacs Holdings Limited | Other services | 2021 |
| Lincoln Motors Limited | Wholesale & retail | 2020 |
| Linetab Services Limited | Other services | 2020 |
| Link Travel 24 7 Ltd | Transport & logistics | 2022 |
| Linner Ltd | Construction | 2026 |
| Linrus Ltd | Other services | 2019 |
| Lion Heart Courier Services Ltd | Transport & logistics | 2024 |
| Little Fika Ltd | Hospitality | 2018 |
| Littlemoss Preservation Limited | Construction | 2007 |
| Live Play Educate Ltd | Construction | 2022 |
| Liyme Ltd | Wholesale & retail | 2021 |
| LIZ Wilkinson Ltd | Professional & scientific | 2022 |
| Local Manufacturing Advisory Service Ltd | Professional & scientific | 2014 |
| Local Saving Store Ltd | Wholesale & retail | 2019 |
| Localboysbuilders Ltd | Construction | 2025 |
| Lockhart Estates Ltd | Financial services | 2025 |
| LOCUMS999 Ltd | Administrative & support | 2019 |
| Lomeshaye Perfomance Limited | Wholesale & retail | 2025 |
| Lontab Limited | Other services | 2021 |
| Lord Elgin Limited | Wholesale & retail | 2010 |
| Lord Nelson Limited | Hospitality | 2025 |
| Lords of Cleaning Ltd | Administrative & support | 2016 |
| Love Radiators Ltd | Wholesale & retail | 2015 |
| Lsisw Ltd | Health & social care | 2022 |
| LTS Cleaning Limited | Administrative & support | 2015 |
| Luca Truck Ltd | Transport & logistics | 2023 |
| Lucavas Construction Ltd | Construction | 2022 |
| Luiss & Noriss Trans Ltd | Transport & logistics | 2018 |
| Luma Retail Limited | Wholesale & retail | 2025 |
| Luminoads Printers Ltd | Professional & scientific | 2025 |
| Lupuvas Construction Ltd | Construction | 2022 |
| Lusil Ltd | Transport & logistics | 2022 |
| Luxury Grandscapes Ltd | Construction | 2020 |
| LW Electrical Limited | Construction | 2008 |
| LWS Recruitment Services Limited | Administrative & support | 2016 |
| Lynchpin Law Ltd | Professional & scientific | 2013 |
| LZM Gulfam Ltd | Wholesale & retail | 2024 |
| M & J Burian Holdings Ltd | Financial services | 2021 |
| M a & Co Accountancy Services Ltd | Professional & scientific | 2024 |
| M Afzal Hussain Limited | Professional & scientific | 2019 |
| M Brickwork Limited | Construction | 2021 |
| M J D Plastering Contractors Ltd | Construction | 2018 |
| M M Khan Ltd | Wholesale & retail | 2023 |
| M O Foods and Meat Ltd | Wholesale & retail | 2024 |
| M S Repairs Nelson Limited | Wholesale & retail | 2020 |
| M Westwood Property Ltd | Real estate | 2017 |
| M&G Stone Limited | Manufacturing | 2002 |
| M&M Signature Dining Ltd | Hospitality | 2025 |
| M.B.L. Engineering Limited | | 1980 |
| M.I. Foods Ltd | Hospitality | 2015 |
| M.Michaels Digital Ltd | Education | 2020 |
| M.P Nelson Limited | Wholesale & retail | 2025 |
| M.R & Sons Motor Group Ltd | Wholesale & retail | 2026 |
| M1 Management Group Ltd | Professional & scientific | 2025 |
| M16 Investments Limited | Financial services | 2021 |
| M1PLUS Programmer Limited | Information & communication | 2022 |
| M2H Chambers Ltd | Information & communication | 2018 |
| M2W Limited | Administrative & support | 2025 |
| M65 Commercials Ltd | Wholesale & retail | 2023 |
| M65 Motor Group Ltd | Wholesale & retail | 2022 |
| MA Abdullah Ltd | Wholesale & retail | 2025 |
| MA Joinery Ltd | Construction | 2025 |
| Maan and Art Ltd | Construction | 2025 |
| MAC Byte UK Ltd | Wholesale & retail | 2019 |
| MAC Car Hire Limited | Other services | 2012 |
| Machine Online Ltd | Wholesale & retail | 2023 |
| Made Bespoke Ltd | Manufacturing | 2024 |
| Made in the Mill Limited | Wholesale & retail | 2021 |
| Madihausma Ltd | Wholesale & retail | 2024 |
| Madina Trading Limited | Real estate | 2002 |
| Madinah Real Estate Ltd | Real estate | 2023 |
| Maeisra Hussain Limited | Other services | 2012 |
| Magic Peaks Limited | Wholesale & retail | 2023 |
| Magic Umbrella Payments Limited | Administrative & support | 2023 |
| Magna Cargo Ltd | Wholesale & retail | 2025 |
| Mahekbakes Ltd | Manufacturing | 2022 |
| Mainline Car Sales & Commercials Limited | Wholesale & retail | 2024 |
| Mairah's Ltd | Wholesale & retail | 2024 |
| Maison ETC Ltd | Construction | 2018 |
| Maison YQ Ltd | Wholesale & retail | 2025 |
| MAK Locum Services Ltd | Wholesale & retail | 2022 |
| MAK Transport Limited | Transport & logistics | 2017 |
| Make More Solutions Ltd | Information & communication | 2020 |
| Making Books Digital Ltd | Professional & scientific | 2025 |
| Malachias Homes Ltd | Real estate | 2025 |
| Malique Ltd | Financial services | 2023 |
| MAM UK Services Ltd | Wholesale & retail | 2022 |
| Mama Pizza Brierfield Ltd | Hospitality | 2024 |
| Manchester Future Care Ltd | Health & social care | 2023 |
| Manchester Gateway Limited | Construction | 2024 |
| Mani Tech Ltd | Wholesale & retail | 2022 |
| Manor Fields Freehold Company (Whalley) Limited | Real estate | 2024 |
| Manor House Funeral Services Limited | Other services | 1998 |
| Manshall Limited | Health & social care | 2015 |
| MAR NW Limited | Health & social care | 2023 |
| Marcin Grab Transport Limited | Transport & logistics | 2017 |
| Mario Coach Travel Limited | Transport & logistics | 2014 |