| Macswan Productions Ltd | Information & communication | 2014 |
| MAD Barista Solutions Ltd | Other services | 2021 |
| MAD Controls Solution Ltd | Construction | 2025 |
| Madden Construction Limited | Construction | 2024 |
| Maddison-Roberts Consulting Limited | Information & communication | 2024 |
| Maddox Rail Service Limited | Extraterritorial | 1999 |
| Made by Unicorn Ltd | Information & communication | 2024 |
| Madeleine English Ltd | Wholesale & retail | 2022 |
| Magees Limited | Other services | 2015 |
| Magic Clearance Ltd | Manufacturing | 2024 |
| Magic Primer Limited | Wholesale & retail | 2025 |
| Magical Escapes Limited | Real estate | 2016 |
| Magickal Thinking Ltd | Professional & scientific | 2026 |
| Magi’S Bar Ltd | Hospitality | 2024 |
| Magmatic Limited | Manufacturing | 2003 |
| Magneum Innovative Ltd. | Manufacturing | 2016 |
| Magnissi Ltd | Professional & scientific | 2016 |
| Magnolia House RTM Company Ltd | Households | 2014 |
| Magpie Taxation Limited | Professional & scientific | 2011 |
| Mahaweli Holdings Limited | Professional & scientific | 2000 |
| Mahi Solutions Ltd | Information & communication | 2012 |
| Maidstone Amateur Boxing Club CIC | Arts & recreation | 2023 |
| Maidstone Barbers Ltd | Other services | 2023 |
| Maidstone Beauty Salon Limited | Other services | 2012 |
| Maidstone Bookkeeping Services Ltd | Professional & scientific | 2020 |
| Maidstone Bootcamp Limited | Arts & recreation | 2022 |
| Maidstone Business Improvement District Limited | Other services | 2018 |
| Maidstone Care Limited | Health & social care | 2019 |
| Maidstone Chicken Shop Ltd | Hospitality | 2025 |
| Maidstone Chinese Limited | Hospitality | 2024 |
| Maidstone Citizens Advice Bureau | Other services | 1988 |
| Maidstone Clutch Centre Limited | Wholesale & retail | 2025 |
| Maidstone Community Wellness Hub CIC | Health & social care | 2024 |
| Maidstone Construction Limited | Construction | 2018 |
| Maidstone Counselling Services Ltd | Health & social care | 2025 |
| Maidstone Electrical Centre Limited | Wholesale & retail | 2001 |
| Maidstone Electrical Contracting Services Ltd | Construction | 2018 |
| Maidstone Engineering Ltd | Construction | 2005 |
| Maidstone Express Food Ltd | Hospitality | 2024 |
| Maidstone Family Law Limited | Professional & scientific | 2016 |
| Maidstone Fencing Limited | Construction | 2014 |
| Maidstone Fish Bar Ltd | Hospitality | 2025 |
| Maidstone Food Investments Ltd | Hospitality | 2022 |
| Maidstone Fresh Fish Ltd | Wholesale & retail | 2026 |
| Maidstone Glass Company Limited | Construction | 1976 |
| Maidstone Glass Investments Ltd | Financial services | 2014 |
| Maidstone Group Limited | Real estate | 2019 |
| Maidstone Gurkha Nepalese CIC | Health & social care | 2016 |
| Maidstone Hackspace CIC | Education | 2024 |
| Maidstone Hair Salon Ltd | Other services | 2024 |
| Maidstone Health Massage Ltd | Other services | 2018 |
| Maidstone Hockey Club Limited | Arts & recreation | 1997 |
| Maidstone Homeless Care | Health & social care | 2013 |
| Maidstone Indians CIC | Professional & scientific | 2023 |
| Maidstone Islamic Centre Limited | Other services | 2017 |
| Maidstone Landscapes & Property Services Ltd | Administrative & support | 2002 |
| Maidstone Learning Centre Limited | Education | 2021 |
| Maidstone Malayalee MMA C.I.C. | Education | 2025 |
| Maidstone Market Limited | Wholesale & retail | 2025 |
| Maidstone Masonic Centre Limited | Hospitality | 1983 |
| Maidstone Media Limited | Information & communication | 2013 |
| Maidstone Mobile Mechanic Ltd | Wholesale & retail | 2026 |
| Maidstone Mobile Phone Repairs Ltd | Other services | 2019 |
| Maidstone MOT Centre Ltd | Wholesale & retail | 2015 |
| Maidstone Motoliner Limited | Wholesale & retail | 2003 |
| Maidstone Nails Limited | Other services | 2025 |
| Maidstone Osteopathy Limited | Health & social care | 2009 |
| Maidstone Oven Cleaners Limited | Administrative & support | 2023 |
| Maidstone Packaging Supplies Limited | Wholesale & retail | 2002 |
| Maidstone Padel Club Limited | Arts & recreation | 2026 |
| Maidstone Pioneers Football Academy Ltd | Education | 2026 |
| Maidstone Practice Limited | Health & social care | 2012 |
| Maidstone Property Holdings Limited | Real estate | 2016 |
| Maidstone Removals Ltd | Transport & logistics | 2019 |
| Maidstone Restaurants Ltd | Hospitality | 2024 |
| Maidstone Smart Repair Centre Ltd | Wholesale & retail | 2010 |
| Maidstone Spanish Cleaning & Media Limited | Wholesale & retail | 2024 |
| Maidstone Storage Solutions Ltd | Transport & logistics | 2017 |
| Maidstone Studios Limited | Information & communication | 1980 |
| Maidstone the Barber Shop Ltd | Other services | 2024 |
| Maidstone Transport Ltd | Transport & logistics | 2020 |
| Maidstone Tree Surgeons Ltd | Administrative & support | 2021 |
| Maidstone Trust Limited | Arts & recreation | 1998 |
| Maidstone Tuition Centre Ltd | Education | 2024 |
| Maidstone Tyres Limited | Wholesale & retail | 2025 |
| Maidstone United (Ground) Limited | Arts & recreation | 2006 |
| Maidstone United Football Club Holdings Limited | Professional & scientific | 2007 |
| Maidstone United Football Club Ltd | Arts & recreation | 1999 |
| Maidstone Vehicle Wraps Ltd | Professional & scientific | 2025 |
| Maidstone Ymca | Arts & recreation | 2005 |
| Maidstonegrill UK Ltd | Hospitality | 2022 |
| Maidworth Holdings Ltd | Financial services | 2024 |
| Maiford Limited | Construction | 1973 |
| Maiford Trading Limited | Professional & scientific | 2007 |
| Mailax Logistics Limited | Transport & logistics | 2016 |
| Maim Enterprise Ltd | Wholesale & retail | 2023 |
| Mainstream Developments Ltd | Real estate | 2019 |
| Mainstream Fleet Services Limited | Administrative & support | 2011 |
| Mainstream Group Limited | Administrative & support | 2015 |
| Mainstream Limited | Transport & logistics | 2008 |