| Mufee Holdings Limited | Financial services | 2023 |
| Mugg & Bean Ltd | Hospitality | 2025 |
| Mukiduuka "the Large Shop" Limited | Wholesale & retail | 2025 |
| Mulberry Homes Construction Company Limited | Construction | 2021 |
| Mulberry Homes Developments Limited | Construction | 2024 |
| Mulberry Music Ltd | Education | 2020 |
| Multi Aspect Ltd | Hospitality | 2021 |
| Multi-National Relief & Development Organisation | Health & social care | 2011 |
| Multiopto Ltd | Health & social care | 2023 |
| Multipond Limited | Wholesale & retail | 1991 |
| Mumtaz Rasool Mirza Limited | Extraterritorial | 2024 |
| Munahco UK Ltd | Wholesale & retail | 2020 |
| Munir FI LLP | | 2017 |
| Munnz Consulting Ltd | Administrative & support | 2015 |
| Murari Ltd | Transport & logistics | 2025 |
| Murrain Construction Ltd | Administrative & support | 2019 |
| Musa Properties Investment Ltd | Real estate | 2023 |
| Muse Sport and Entertainment Ltd | Professional & scientific | 2019 |
| Music Teachers Collective Limited | Education | 2026 |
| Mustard Global Limited | Financial services | 2015 |
| Muzizi Group Limited | Professional & scientific | 2020 |
| MV Europe Limited | Administrative & support | 2015 |
| MV Fashion Limited | Administrative & support | 2015 |
| MV Retail Limited | Administrative & support | 2015 |
| MV Structural Engineers Ltd | Professional & scientific | 2022 |
| MVB Consultants Ltd | Professional & scientific | 2023 |
| MVP Development Limited | Construction | 2025 |
| MVS Express Ltd | Wholesale & retail | 2020 |
| Mvubu Limited | Professional & scientific | 2004 |
| MW Grips Ltd | Information & communication | 2016 |
| MWC Transport Ltd | Transport & logistics | 2025 |
| MWQ Accountancy Services Ltd | Professional & scientific | 2016 |
| MX3 Solutions Ltd | Information & communication | 2017 |
| MXT Holdings Ltd | Financial services | 2024 |
| My & KI Couriers Ltd | Transport & logistics | 2017 |
| My Bioskin Ltd | Other services | 2020 |
| My Changing Skin Limited | Professional & scientific | 2013 |
| My Citywise Ltd | Real estate | 2020 |
| My Core Beauty Limited | Other services | 2019 |
| My Destiny Inc Limited | Education | 2024 |
| My Destiny Ministries Limited | Education | 2015 |
| My Dog Gimli Ltd | Professional & scientific | 2019 |
| My Home Learning Ltd | Education | 2023 |
| My Karr UK Limited | Transport & logistics | 2018 |
| My Life Journey Ltd | Financial services | 2025 |
| My Partnership Ltd | Administrative & support | 2017 |
| My TLC Academy Ltd | Education | 2020 |
| My-Styles Services Limited | Administrative & support | 2017 |
| MY1CHOICE Ltd | Construction | 2022 |
| Myblinx Limited | Wholesale & retail | 2014 |
| Mygodfirst Ltd | Health & social care | 2024 |
| Myitechuk Limited | Information & communication | 2006 |
| Myke A.C Limited | Construction | 2025 |
| Mylittlevenue Ltd | Information & communication | 2012 |
| Myluckytickets Limited | Arts & recreation | 2025 |
| Myresolve Solutions Ltd | Professional & scientific | 2023 |
| Myriad Properties (Salisbury) Limited | Real estate | 2025 |
| Myrie Recruitment Ltd | Administrative & support | 2025 |
| Mystical ARK Consulting Limited | Information & communication | 2014 |
| N & J Wholesale Foods Limited | Wholesale & retail | 2002 |
| N & N Food and Wine Store Ltd | Wholesale & retail | 2020 |
| N a Car Repairs Ltd | Wholesale & retail | 2022 |
| N Jeffries Electrical Ltd | Construction | 2018 |
| N Rajendram & Co Ltd | Professional & scientific | 2018 |
| N Reeves Electrical Services Ltd | Construction | 2023 |
| N T Pask Ltd | Construction | 2022 |
| N&L Holdings Ltd | Hospitality | 2022 |
| N&S Food and Wine Ltd | Wholesale & retail | 2024 |
| N.A. Brown Limited | Manufacturing | 1987 |
| N.F.W. Holdings Limited | Financial services | 2015 |
| N.F.W. Inspection Co. Limited | Professional & scientific | 1972 |
| N.G. Building Services Limited | Professional & scientific | 2008 |
| N.J.Wallace Advisory Limited | Professional & scientific | 2016 |
| N.K.G. Building Limited | Construction | 1991 |
| N.S. Business Solutions Ltd | Professional & scientific | 2011 |
| N52 Properties Ltd | Real estate | 2024 |
| NA & MS Investments Ltd | Real estate | 2025 |
| Naada Bindu Ltd | Information & communication | 2026 |
| Naan Bakers Limited | Real estate | 2022 |
| Naaraf Group Ltd | Professional & scientific | 2026 |
| NAB Cleaning Services Ltd | Administrative & support | 2022 |
| Nabi Holdings Limited | Real estate | 2016 |
| Nabiha.D. Limited | Health & social care | 2025 |
| Nadirah Technologies Limited | Information & communication | 2015 |
| Naero Studios Ltd | Wholesale & retail | 2023 |
| Nafa Investment Ltd | Real estate | 2024 |
| Nafa Light Limited | Wholesale & retail | 1987 |
| Naga Advisory Limited | Professional & scientific | 2016 |
| Nahla Limited | Financial services | 2010 |
| Naik Group Ltd | Construction | 2022 |
| Nailed IT Roofing and Construction Limited | Construction | 2020 |
| Nails Envy Ltd | Other services | 2024 |
| Nailworks Limited | Real estate | 2001 |
| Naish Energy Ltd | Construction | 2023 |
| Naish Roofing and Property Services Ltd | Construction | 2025 |
| Naish Roofing Ltd | Construction | 2020 |
| Najat Medical Ltd | Wholesale & retail | 2021 |
| Nakiso Accessories Ltd | Wholesale & retail | 2024 |
| Namefile Properties Limited | Households | 1993 |
| Namk Services Ltd | Education | 2026 |