| LUX Freight Management Ltd | Transport & logistics | 2023 |
| LUX Glazing Ltd | Construction | 2022 |
| Luxe Dental Ltd | Health & social care | 2025 |
| Luxes London Ltd | Wholesale & retail | 2023 |
| Luxury Brand Ltd | Wholesale & retail | 2024 |
| Luxury Handbags Limited | Wholesale & retail | 2019 |
| Luxury Meena Bazar Ltd | Wholesale & retail | 2024 |
| Luxury Shoe Zone Ltd | Wholesale & retail | 2024 |
| Luxury Wedding Accessories Ltd | Wholesale & retail | 2022 |
| Luxurygiftslondon Limited | Wholesale & retail | 2024 |
| LV Top Ltd | Construction | 2025 |
| LV Trade Group Ltd | Construction | 2025 |
| LV Trade Ltd | Wholesale & retail | 2024 |
| Lychworth Limited | Wholesale & retail | 2014 |
| M & a Vegetable Limited | Wholesale & retail | 2019 |
| M & S Investco Ltd | Real estate | 2017 |
| M and H Properties Ltd | Real estate | 2024 |
| M Gill Consultancy Ltd | Administrative & support | 2024 |
| M H a Real Estate Ltd | Real estate | 2021 |
| M H Curling Ltd | Other services | 2025 |
| M H G Construction Limited | Construction | 2019 |
| M K Impex Ltd | Wholesale & retail | 2016 |
| M KIT Limited | Wholesale & retail | 2026 |
| M Lonfur Ltd | Wholesale & retail | 2024 |
| M Mussa Developments 01 Ltd | Real estate | 2024 |
| M Mussa Estates Ltd | Construction | 2025 |
| M S Cityride Limited | Transport & logistics | 2025 |
| M S R Household Ltd | Wholesale & retail | 2025 |
| M S Warraich Ltd | Construction | 2022 |
| M Services Britannia Ltd | Construction | 2016 |
| M&A Traders Ltd | Wholesale & retail | 2024 |
| M&H Accessories Ltd | Wholesale & retail | 2015 |
| M&Ig Joinery Ltd | Manufacturing | 2023 |
| M&K Beauty LAB Ltd | Other services | 2025 |
| M&M Car Hire Limited | Wholesale & retail | 2025 |
| M&M Locum Services Ltd | Health & social care | 2021 |
| M&N Partners Ltd | Wholesale & retail | 2017 |
| M&N Partners Property Ltd | Real estate | 2025 |
| M&R Enterprises Ltd | Wholesale & retail | 2025 |
| M'S Luxury Gelato Ltd | Hospitality | 2017 |
| M-Bitz Ltd | Wholesale & retail | 2011 |
| M.Ch Artful Touch Limited | Wholesale & retail | 2026 |
| M.N. Coachworks LDN Ltd | Wholesale & retail | 2025 |
| M.R. Dental Holdings Ltd | Health & social care | 2015 |
| M.R.K. Investment Property Ltd | Real estate | 2025 |
| M.S Construction Work Ltd | Construction | 2025 |
| M.S. Gill & Sons (Holdings) Limited | Financial services | 2021 |
| M.S. Gill & Sons (Properties) Limited | Construction | 2021 |
| M.S. Gill & Sons (Property Holdings) Limited | Financial services | 2021 |
| M.S. Gill & Sons Limited | Wholesale & retail | 1984 |
| M.S.D. Construction Limited | Administrative & support | 1995 |
| M.T.T.V Company Ltd | Hospitality | 2024 |
| M14CHOGYMWEAR Ltd | Wholesale & retail | 2021 |
| M25 Windows Limited | Administrative & support | 2023 |
| MA Jewellers Ltd | Manufacturing | 2023 |
| Maalga Limited | Hospitality | 2019 |
| Maalik & Co Limited | Professional & scientific | 2012 |
| Maan Carpet and Commercial Flooring Ltd | Wholesale & retail | 2025 |
| Maan Design and Build Ltd | Construction | 2023 |
| Maan Food and Wine Ltd | Wholesale & retail | 2025 |
| Maan Grill & Pizza Ltd | Hospitality | 2025 |
| Maan Singh UK Limited | Transport & logistics | 2025 |
| Maans Property Ltd | Real estate | 2022 |
| Maanya Enterprises Limited | Hospitality | 2014 |
| Maanya London Limited | Hospitality | 2016 |
| MAC Global Ventures Ltd | Wholesale & retail | 2020 |
| MAC Industrial Tools Limited | Wholesale & retail | 2021 |
| MAC Property Repair Ltd | Construction | 2026 |
| Mackades Limited | Wholesale & retail | 2025 |
| Madan and Shruti Ltd | Wholesale & retail | 2020 |
| Madari Import Ltd | Wholesale & retail | 2020 |
| Made 4 Construction Ltd | Construction | 2025 |
| Made by Metos Group Ltd | Construction | 2021 |
| Madhan & Sons UK Limited | Wholesale & retail | 2006 |
| Madhan Fashion Limited | Wholesale & retail | 2010 |
| Madhan Food & Wine Ltd | Wholesale & retail | 2012 |
| Madhan Properties Ltd | Real estate | 2023 |
| Madhan UK Investments Ltd | Wholesale & retail | 2021 |
| Madhus Events Ltd | Professional & scientific | 2015 |
| Madhus Investments Limited | Real estate | 2017 |
| Madhus Properties Limited | Real estate | 2020 |
| Madina Gold Jewellers Limited | Wholesale & retail | 2025 |
| Madyn Auto Ltd | Wholesale & retail | 2025 |
| Maga Cleaning Ltd | Other services | 2015 |
| Magic Brush Ltd | Construction | 2026 |
| Magic London Ltd | Manufacturing | 2025 |
| Magic Sicily Ltd | Wholesale & retail | 2025 |
| Magic Team Construction Limited | Construction | 2020 |
| Magic Touch Estates Ltd | Real estate | 2018 |
| Magnum White Line Services Ltd | Wholesale & retail | 2025 |
| Magnus Media Ltd | Professional & scientific | 2023 |
| MAH Diamonds Jewellery Workshop Ltd | Other services | 2016 |
| Maha Lakshmi Land Ltd | Real estate | 2025 |
| Mahadev Construction Ltd | Construction | 2025 |
| Mahakal Sahaye Ltd | Information & communication | 2025 |
| Mahaltransportlimited Ltd | Transport & logistics | 2026 |
| Maharaja (London) Limited | Real estate | 2025 |
| Maharaja Enterprises Limited | Other services | 2026 |
| Mahendra T Chauhan Ltd | Construction | 2024 |
| Mahi & Sons Ltd | Wholesale & retail | 2025 |