| Macombe Wholesalers Ltd | Wholesale & retail | 2013 |
| Macr Ltd | Energy | 2015 |
| Macromove Ltd | Extraterritorial | 2012 |
| Macs Ortho Limited | Professional & scientific | 2023 |
| Macsix Consulting Ltd | Information & communication | 2016 |
| MAD Dog Communications Ltd | Professional & scientific | 2007 |
| MAD Sheep PUB Company Ltd | Hospitality | 2022 |
| Madamedare Limited | Manufacturing | 2026 |
| Madani Memorials Nottingham Ltd | Manufacturing | 2024 |
| Maddison Associates (UK) Limited | Financial services | 2003 |
| Maddock Hawkins Limited | Professional & scientific | 2024 |
| Made by Arthur Ltd | Professional & scientific | 2026 |
| Made by Committee Limited | Wholesale & retail | 2020 |
| Made by Starr Ltd | Wholesale & retail | 2018 |
| Made Composites Ltd | Manufacturing | 2021 |
| Made in Brazil Market Ltd | Wholesale & retail | 2021 |
| Made With Love Official Nottingham Limited | Hospitality | 2022 |
| MADE4BUSINESS.UK Limited | Professional & scientific | 2025 |
| Madeley Court Hotel Ltd | Extraterritorial | 2016 |
| Madhi Ltd | Health & social care | 2013 |
| Madhouse NUT Centre Limited | Professional & scientific | 2011 |
| Madina Estates Limited | Construction | 2020 |
| Madina Travel Nottingham Ltd | Administrative & support | 2018 |
| Madinah Gate Limited | Real estate | 2024 |
| Madoro Limited | Real estate | 2003 |
| Madox Fintech Ltd | Information & communication | 2022 |
| Madsey Limited | Real estate | 2021 |
| Madstar Media Ltd | Professional & scientific | 2023 |
| MAE Care Ltd | Health & social care | 2018 |
| MAE Intervention Services Ltd | Health & social care | 2014 |
| MAE Living Limited | Real estate | 2018 |
| MAE PUB Group Limited | Hospitality | 2025 |
| Maern Limited | Real estate | 2020 |
| Maestro Music Productions Limited | Arts & recreation | 2005 |
| MAF Lighting and Testing Services Ltd | Construction | 2015 |
| Mafpac Limited | Professional & scientific | 2011 |
| Mafu Ltd | Health & social care | 2023 |
| MAG House Trading Ltd | Health & social care | 2017 |
| MAG MUG Limited | Wholesale & retail | 2019 |
| Magali Coiffure ET Beaute Ltd | Other services | 2020 |
| Magata Ltd | Health & social care | 2023 |
| Magda Matusiak Ltd | Health & social care | 2025 |
| Magdala Lawn Tennis Club Limited(The) | Arts & recreation | 1944 |
| Magdala Property Management Ltd | Real estate | 2024 |
| Magdala Road Management Company Limited | Real estate | 1994 |
| Magdalena Kulesza Ltd | Extraterritorial | 2024 |
| Magec Limited | Real estate | 2013 |
| Magenta Care Group Limited | Health & social care | 2025 |
| Magenta Fascia Services (MFS) Limited | Construction | 2022 |
| Maggie Boyd Consulting Ltd | Professional & scientific | 2019 |
| Maghrabi Ltd | Extraterritorial | 2026 |
| Magic Cars Limited | Wholesale & retail | 2017 |
| Magic in Maths Ltd | Administrative & support | 2018 |
| Magic Land Ltd | Wholesale & retail | 2024 |
| Magic Music Ltd | Construction | 2020 |
| Magic Pages Limited | Wholesale & retail | 2023 |
| Magic Potion Ltd | Professional & scientific | 2018 |
| Magic Taste House Limited | Hospitality | 2016 |
| Magic TIE Ltd | Professional & scientific | 2024 |
| Magical Spaces Limited | Hospitality | 2019 |
| Magikats Chilwell Ltd | Education | 2019 |
| Maginlea Sports Limited | Financial services | 2024 |
| Magique Beauty Limited | Wholesale & retail | 2025 |
| Magmel Ltd | Arts & recreation | 2023 |
| Magna Automotive Ltd | Wholesale & retail | 2018 |
| Magna Britannia Ltd | Real estate | 2024 |
| Magna Carta Properties Ltd | Real estate | 2017 |
| Magna Mechanical Ltd | Construction | 2018 |
| Magna Properties Limited | Real estate | 2015 |
| Magna Security Limited | Administrative & support | 2026 |
| Magnasocket Ltd | Manufacturing | 2026 |
| Magneto Technologies Limited | Information & communication | 2006 |
| Magnificentrapidconcierge Ltd | Administrative & support | 2025 |
| Magnolia Market Limited | Hospitality | 2017 |
| Magnolia Therapy Center Limited | Health & social care | 2016 |
| Magnolia Treatment Centre Limited | Other services | 2018 |
| Magnolia Wellbeing Ltd | Health & social care | 2025 |
| Magnotherapy Ltd | Health & social care | 2024 |
| Magnum Electrical Services Ltd | Construction | 2020 |
| Magnus Opus Ltd | Information & communication | 2015 |
| Magonics Limited | Wholesale & retail | 2026 |
| Magpie Couriers Ltd | Transport & logistics | 2019 |
| Magpie Digital Solutions Ltd | Professional & scientific | 2023 |
| Magpie Security Limited | Administrative & support | 2002 |
| Magsan Ltd | Professional & scientific | 2022 |
| Maguire Jackson Commercial Limited | Real estate | 2026 |
| Maguire Paving Ltd | Administrative & support | 2020 |
| Magulate Ltd | Information & communication | 2025 |
| Magura Bosch Parts & Services UK Ltd | Wholesale & retail | 2002 |
| Magus Films Limited | Professional & scientific | 2018 |
| Magyar Bullion Ltd | Wholesale & retail | 2026 |
| Magz Group Ltd | Manufacturing | 2026 |
| MAH Autofit Ltd | Wholesale & retail | 2025 |
| Mahadev Trishul Co Ltd | Hospitality | 2026 |
| Mahal Enterprises Limited | Wholesale & retail | 2013 |
| Mahal Group Properties Limited | Real estate | 2024 |
| Mahal Investments Limited | Real estate | 1987 |
| Mahb Limited | Other services | 2025 |
| Mahcon Holdings Limited | Construction | 2009 |
| Mahf Trading Limited | Construction | 2021 |