| THE London and Overseas Insurance Company Limited | Financial services | 1893 |
| THE LOW Hall Partnership LLP | | 2011 |
| THE Luna Elite Limited | Professional & scientific | 2025 |
| THE Lupin Bean Company Ltd | Manufacturing | 2026 |
| THE Luxee Collective Co Limited | Education | 2019 |
| THE Luxury Sleep Company Ltd | Wholesale & retail | 2018 |
| THE MAD Titan Limited | Wholesale & retail | 2020 |
| THE Magnificent Marmaduke Ltd | Hospitality | 2025 |
| THE Maid of the North Ltd | Administrative & support | 2024 |
| THE Mailbox Leeds Ltd | Hospitality | 2018 |
| THE Main Contractor (York) Limited | Construction | 2022 |
| THE Maintainers Ltd | Other services | 2022 |
| THE Makdees Ltd | Hospitality | 2016 |
| THE Make-Up LAB Limited | Health & social care | 2013 |
| THE Malt Brewhouse Ltd | Hospitality | 2014 |
| THE Malt Shovel Brearton Limited | Hospitality | 2006 |
| THE Maltings Organic Treatment Holdings Limited | Financial services | 2024 |
| THE Mamba Group Limited | Financial services | 2023 |
| THE MAN WHO CAN Limited | Construction | 2003 |
| THE Manor (Scholes) Management Limited | Real estate | 2011 |
| THE Manor House ST Ives Limited | Real estate | 2020 |
| THE Maritime Consultancy Limited | Professional & scientific | 2021 |
| THE Market Place (Leeds) | Health & social care | 1989 |
| THE Marshmallowists Ltd | Manufacturing | 2012 |
| THE Masala Library Ltd | Hospitality | 2023 |
| THE Matt Haycox Group Limited | Professional & scientific | 2022 |
| THE Maxwell System Ltd | Professional & scientific | 2018 |
| THE Mayers Ensemble Ltd | Arts & recreation | 2022 |
| THE MDS Partnership Ltd | Financial services | 2014 |
| THE Mean Baker Ltd | Hospitality | 2026 |
| THE Meanwood Brewery Ltd | Manufacturing | 2016 |
| THE Meat Drunkery Ltd | Hospitality | 2024 |
| THE Medal Box Company Ltd | Extraterritorial | 2015 |
| THE Medboard Company Limited | Information & communication | 2017 |
| THE Medical Museum Trading Company Limited | Wholesale & retail | 1991 |
| THE Medications Management Group Ltd | Professional & scientific | 2024 |
| THE Melt Cafe Ltd | Information & communication | 2022 |
| THE Metal Store Ltd | Wholesale & retail | 2005 |
| THE Metals Consultancy Company Limited | Manufacturing | 2001 |
| THE Method Room Limited | Arts & recreation | 2025 |
| THE MEX by Night Ltd | Hospitality | 2014 |
| THE Meyer Therapy Practice Ltd | Health & social care | 2020 |
| THE Michelle Murphy Ltd | Administrative & support | 2024 |
| THE Middle Floor Artist Development and Producing CIC | Arts & recreation | 2025 |
| THE Midpoint Podcast LLP | | 2025 |
| THE Miles Partnership Limited | Other services | 2014 |
| THE Milk Bar Manor Square Ltd | Hospitality | 2024 |
| THE Milk Churn Ltd | Manufacturing | 2017 |
| THE Mill @ Scott Hall LLP | | 2010 |
| THE Millstone PUB Company Limited | Hospitality | 2016 |
| THE Mind Pro Limited | Health & social care | 2022 |
| THE Minibeast Club Ltd | Education | 2007 |
| THE Missing Village CIC | Hospitality | 2025 |
| THE Mobile DEV Ltd | Information & communication | 2021 |
| THE Modern Caters Ltd | Hospitality | 2026 |
| THE Modest MUM Ltd | Wholesale & retail | 2024 |
| THE Money Circle Limited | Information & communication | 2025 |
| THE Money Pipeline Ltd | Wholesale & retail | 2026 |
| THE Monkbridge 4 Limited | Households | 2008 |
| THE Monkey Puzzle Tree Ltd | Wholesale & retail | 2016 |
| THE Monroe Group Limited | Financial services | 2026 |
| THE Moorings (Maintenance) Limited | Households | 1988 |
| THE Moorings (Woodlesford) Management Company Limited | Real estate | 2023 |
| THE Moran Partnership LLP | | 2010 |
| THE Moreby Hall Estate Limited | Construction | 2022 |
| THE Moreby Hall Estate Management Company Limited | Households | 2022 |
| THE Moreby Hall Mansion House Management Company Limited | Households | 2023 |
| THE Morley Cobbler Limited | Other services | 2013 |
| THE Mortgage Guide Limited | Financial services | 2001 |
| THE Morton Motor Company (Yorkshire) Limited | Manufacturing | 2020 |
| THE Mosaic & Tile Company Ltd | Wholesale & retail | 2017 |
| THE Mosaic Tile Company Limited | Wholesale & retail | 2001 |
| THE MOT People Ltd | Wholesale & retail | 2019 |
| THE Motor House (Leeds) Limited | Wholesale & retail | 2009 |
| THE Motorworks Management Company Limited | Households | 2019 |
| THE Mould Team Ltd | Construction | 2021 |
| THE Mountain Commerce Ltd | Wholesale & retail | 2022 |
| THE Muscle and Bone Clinic Limited | Health & social care | 2018 |
| THE Mussel POT Ltd | Hospitality | 2014 |
| THE Nags Head (Leeds) Ltd | Hospitality | 2023 |
| THE Naik Amaal Company Limited | Arts & recreation | 2025 |
| THE Nail LAB Group Limited | Wholesale & retail | 2022 |
| THE Nail Tech Hub Limited | Education | 2025 |
| THE Name of the Game Ltd. | Professional & scientific | 2015 |
| THE Nanu Creative Ltd | Professional & scientific | 2021 |
| THE Narrowboat Skipton Limited | Extraterritorial | 2023 |
| THE National Skills Academy for Social Care Limited | Extraterritorial | 2015 |
| THE Nave Studios LLP | | 2019 |
| THE New Acapella Ltd | Hospitality | 2024 |
| THE New Inn (Leeds) Ltd | Hospitality | 2025 |
| THE New Otley Run Fish Bar Ltd | Hospitality | 2025 |
| THE Newcastle Jewellery Company Limited | Administrative & support | 1987 |
| THE Newsmarket Limited | Information & communication | 2001 |
| THE Nield Property Partnership LLP | | 2023 |
| THE Nile Vibes Limited | Wholesale & retail | 2025 |
| THE Nineteen Project Ltd | Real estate | 2022 |
| THE NO.1 Headshop Ltd | Wholesale & retail | 2024 |
| THE NO1 Plug (Leeds) Ltd | Wholesale & retail | 2021 |
| THE Nook Cafe York Ltd | Hospitality | 2025 |
| THE North Corner Ltd | Professional & scientific | 2020 |