| Little Hunsley Farm Limited | Agriculture & fishing | 2009 |
| Livesey of Hull Limited | Information & communication | 1982 |
| Lloyd & Co Holdings Limited | Real estate | 2026 |
| LMS Asset Management Limited | Real estate | 2024 |
| Lobe Media Ltd | Professional & scientific | 2026 |
| Locked Box Properties Limited | Real estate | 2022 |
| Locksley Consortium Limited | Hospitality | 2025 |
| London & Lincoln Limited | Hospitality | 2005 |
| Lords Wood Events Limited | Hospitality | 2023 |
| Louanns Cleaning Hub Limited | Administrative & support | 2025 |
| Lou’S Loungerie Ltd | Wholesale & retail | 2024 |
| LOW Farm Renewables Limited | Energy | 2015 |
| LOW Hunsley Livery Limited | Agriculture & fishing | 2026 |
| LS Social Work Assessments and Consultancy Ltd | Health & social care | 2023 |
| Ltdi Ltd | Education | 2023 |
| Lucky House Hull Ltd | Hospitality | 2025 |
| Lucy's Hair Group Ltd | Other services | 2025 |
| M & C Coastal Getaways Ltd | Hospitality | 2023 |
| M & O Property Holdings Ltd | Hospitality | 2020 |
| M H Builders (Cottingham) Ltd | Construction | 2012 |
| M J Alcock & Sons (Hull) Limited | Construction | 2014 |
| M S W Electrical Services (Hull) Ltd | Construction | 2010 |
| M&F Cafe Cottingham Ltd | Hospitality | 2025 |
| M. a. Green Electrical Limited | Construction | 2015 |
| M.R. Joinery Services Limited | Construction | 2022 |
| M.R. Nequest Electrical Engineering and Contracting Limited | Manufacturing | 2022 |
| M.R.Otto Ltd | Financial services | 2025 |
| M.Roker Creative Ltd | Professional & scientific | 2026 |
| Magnolia House Limited | Health & social care | 2018 |
| Magnolia PLH Limited | Health & social care | 2025 |
| Maison Cardinal Health Limited | Health & social care | 2025 |
| Maison Property Development Ltd | Real estate | 2018 |
| Maksoview Ltd | Health & social care | 2022 |
| Malt Handling Installations Limited | Manufacturing | 2018 |
| Mamo Design Services Ltd. | Professional & scientific | 2016 |
| Manor Barn Duncton Limited | Hospitality | 2025 |
| Manor Barn Events Ltd | Hospitality | 2013 |
| Manor Electrical Hull Ltd | Other services | 2026 |
| Marinalofts Limited | Real estate | 2018 |
| Mark Holmes Transport Limited | Transport & logistics | 2008 |
| Mark Walker Limited | Professional & scientific | 2003 |
| Marsden Builders (Holdings) Limited | Financial services | 2022 |
| Martial Arts Marketing Limited | Real estate | 2020 |
| Match Marketing UK Ltd | Other services | 2015 |
| Matthews Media Ltd | Information & communication | 2012 |
| Maze Developments Ltd | Households | 2025 |
| MBB Solutions Limited | Construction | 2008 |
| MBI Hull Ltd | Construction | 2016 |
| Mbogitech Concepts Ltd | Information & communication | 2026 |
| Mccloud Investments Limited | Real estate | 2021 |
| MDL Partners Ltd | Professional & scientific | 2026 |
| Medical Sales Group Ltd | Wholesale & retail | 2025 |
| Mellandene Limited | Health & social care | 1985 |
| Merchants Drive Management Company Limited | Households | 2012 |
| MERIVALE363 Limited | Real estate | 2016 |
| Metallimonsters Ltd | Wholesale & retail | 2015 |
| MF Electrical Engineers Ltd | Construction | 2023 |
| Michael Bamforth BA (Hons) Architecture Limited | Professional & scientific | 2014 |
| Midgaard Ltd | Financial services | 2023 |
| Mike Chapman Carpets Limited | Wholesale & retail | 2018 |
| Millins Yard Management Company Limited | Administrative & support | 2006 |
| Millys Recovery Limited | Transport & logistics | 2025 |
| Mind Body Approach Limited | Other services | 2026 |
| Minster Translations Limited | Administrative & support | 2002 |
| MJF Tutoring Ltd | Education | 2022 |
| MK Locum Services Ltd | Health & social care | 2015 |
| ML Forklift Training UK Limited | Education | 2022 |
| MMK Properties Ltd | Real estate | 2020 |
| Moneta UK Limited | Wholesale & retail | 2004 |
| Monkey SEE Monkey ZOO Ltd | Wholesale & retail | 2026 |
| Moon Doodle Media Limited | Information & communication | 2025 |
| Moorgate Care Village Limited | Health & social care | 2020 |
| Moorgate PLH Limited | Health & social care | 2025 |
| Mortgage Advice Firm Ltd | Financial services | 2021 |
| Mortgage Options (Hull) Limited | Extraterritorial | 2015 |
| Motorworx Limited | Wholesale & retail | 2018 |
| MR Saturday Night Limited | Arts & recreation | 2025 |
| MR Smiths Caterers Limited | Hospitality | 2004 |
| MRS Pink Music Production & Entertainment Ltd | Arts & recreation | 2026 |
| MS Consulting Solutions Ltd | Professional & scientific | 2026 |
| MSR Plant Group Limited | Administrative & support | 2025 |
| Muliano Investment Group Ltd | Wholesale & retail | 2018 |
| Mummy Meegz Limited | Manufacturing | 2017 |
| Murray Martin Developments Limited | Real estate | 2018 |
| MW Logistics Consultancy Ltd | Professional & scientific | 2024 |
| Mwjr Partners Ltd | Real estate | 2018 |
| My Anchor Property Ltd | Real estate | 2020 |
| MYM Construction Hull Limited | Construction | 2026 |
| Narrowboat Day Hire Ltd | Other services | 2022 |
| Narrowboat Training Ltd | Education | 2026 |
| Nathan Shearsmith Limited | Professional & scientific | 2022 |
| Navyamishra Limited | Real estate | 2025 |
| NE Enterprises Limited | Information & communication | 2022 |
| Neustadt Ltd | Construction | 2017 |
| New Golden Gate Ltd | Hospitality | 2022 |
| New Moon Entertainment Limited | Hospitality | 2025 |
| New Oxford Advisory & Consulting Limited | Professional & scientific | 2013 |
| New Tyre Empire Limited | Wholesale & retail | 2026 |
| Newlove Property Limited | Real estate | 2024 |
| Nexisip Ltd | Information & communication | 2025 |