| Jill Ogden Consulting Limited | Professional & scientific | 2008 |
| JJB Calibrated Ltd | Other services | 2026 |
| Jo's Pantry Hope Valley Limited | Other services | 2024 |
| John Bank Engineering Limited | Manufacturing | 2016 |
| John Brocklehurst Manufacturing Limited | Wholesale & retail | 1964 |
| John I. Fearn (Agricultural) Limited | Real estate | 1948 |
| Johnsons Holdings Limited | Professional & scientific | 2015 |
| Johnston Foster Limited | Professional & scientific | 2012 |
| JSM Primary Maths Ltd | Education | 2017 |
| Jtvenues Ltd | Hospitality | 2015 |
| Julie Hirst Hypnotherapy Ltd | Health & social care | 2022 |
| Katie's Cottages Ltd | Hospitality | 2025 |
| Keeble Cask Company Ltd | Wholesale & retail | 2020 |
| Kemble&Co Ltd | Real estate | 2025 |
| KG Build Ltd. | Construction | 2026 |
| KIN Sauna Limited | Health & social care | 2025 |
| KKB Hair Limited | Other services | 2024 |
| Koko Restaurant Limited | Hospitality | 2014 |
| Komzii Limited | Information & communication | 2020 |
| Koru Pro Consulting Limited | Professional & scientific | 2015 |
| L a & H Burtonshaw Limited | Agriculture & fishing | 2009 |
| LA Bella Cafe Bar Bistro Ltd | Hospitality | 2026 |
| Landsia Limited | Professional & scientific | 2012 |
| Lathkil Hotel Limited(The) | Hospitality | 1981 |
| Lattice Solutions Limited | Information & communication | 2019 |
| Layercake Consultancy Limited | Professional & scientific | 2019 |
| Lead TIN Yellow Limited | Wholesale & retail | 2020 |
| Leasow Developments Limited | Real estate | 2005 |
| LEE Smith Holdings Limited | Hospitality | 2019 |
| Lenton Developments Limited | Hospitality | 2008 |
| LET ME Stay Limited | Real estate | 2019 |
| Letsellmove Ltd | Real estate | 2015 |
| Lfco Ltd | Households | 2019 |
| Lilafjord Ltd | Information & communication | 2016 |
| Lilycroft Estates Limited | Real estate | 2000 |
| Limitless Country Catering Ltd | Hospitality | 2024 |
| Ling Estates Limited | Real estate | 2018 |
| Lisa's Hairdressing Limited | Other services | 2014 |
| Lismore Castle & Gardens Limited | Hospitality | 2018 |
| Litton (Archer Road) Limited | Construction | 2004 |
| Litton (Donington) Limited | Construction | 2015 |
| Litton (Greenland Road) Limited | Construction | 2004 |
| Litton (Hellaby) Limited | Real estate | 2004 |
| Litton (Parkgate) Limited | Real estate | 2003 |
| Litton (Thame) Limited | Construction | 2006 |
| Litton Buccleuch (Congleton) Ltd | Real estate | 2026 |
| Litton Buccleuch (Wmpe) Limited | Construction | 2015 |
| Litton Construction Limited | Construction | 2021 |
| Litton Developments Limited | Real estate | 2003 |
| Litton Energy Limited | Energy | 2017 |
| Litton Farming Limited | Agriculture & fishing | 2017 |
| Litton Holdings Limited | Professional & scientific | 2005 |
| Litton Homes Limited | Construction | 2021 |
| Litton Investments Limited | Construction | 2017 |
| Litton Limited | Construction | 2009 |
| Litton Living Limited | Construction | 2008 |
| Litton Properties Limited | Construction | 1993 |
| Ljmm Assets Ltd | Administrative & support | 2021 |
| LLB Properties Limited | Real estate | 2005 |
| Lloyds Services & Solutions Limited | Manufacturing | 2014 |
| Lmiller Property Management Limited | Real estate | 2025 |
| London Construction Management Training Ltd | Education | 2016 |
| Long Rake Spar Company Limited(The) | Mining & quarrying | 1960 |
| Longbow Bars & Restaurants Ltd | Hospitality | 2019 |
| Longstone Edge Limited | Administrative & support | 2008 |
| LRS Broadhurst Holdings Limited | Financial services | 2018 |
| Luminas Investment Limited | Real estate | 2024 |
| Lumiox Limited | Health & social care | 2025 |
| Lwyr Consulting Limited | Other services | 2024 |
| M & E Sellors Decorative Stone Ltd | Construction | 2014 |
| M E Ellis Building Limited | Other services | 2024 |
| M Noton & Sons Plumbing Limited | Construction | 2022 |
| M&C Cleaning Services Limited | Administrative & support | 2025 |
| M&Ea Property LLP | | 2024 |
| Mabpw Limited | Hospitality | 2025 |
| Mach 1 Project Management Limited | Professional & scientific | 2016 |
| Maloney Green Associates Limited | Professional & scientific | 2013 |
| Manners & Penn Limited | Financial services | 1997 |
| Mark R Walker Limited | Transport & logistics | 2007 |
| Mark S Thompson Timber Contractors Limited | Agriculture & fishing | 2004 |
| Mark Thomas Fabrications Ltd | Manufacturing | 2019 |
| Marriott Farming Limited | Extraterritorial | 2026 |
| Marriott Property Investments Limited | Extraterritorial | 2025 |
| Marsh Brothers Engineering Services Limited | Manufacturing | 1984 |
| Martin Finney Limited | Other services | 2023 |
| Mcconnells (Midlands) Limited | Professional & scientific | 2021 |
| Mcmillan Decorators Ltd | Construction | 2007 |
| MDF Inspirations Limited | Extraterritorial | 2007 |
| Meadow Croft Consulting Ltd | Information & communication | 2017 |
| Media FHE Limited | Other services | 2007 |
| Mellors Elliot Motorsport Limited | Wholesale & retail | 2011 |
| Mercuryavs Ltd | Information & communication | 2007 |
| Mere Wyke Limited | Hospitality | 2021 |
| Merlini Trading Limited | Manufacturing | 2016 |
| Mfco Fhls Ltd | Hospitality | 2021 |
| Michael Fenton & Co Limited | Professional & scientific | 2003 |
| Midco (Bakewell) Limited | Wholesale & retail | 1991 |
| Middleton Capital Limited | Financial services | 2021 |
| Minden Properties Ltd | Real estate | 2024 |
| Missed Keys Ltd | Households | 2025 |