| MTB Sign Services Ltd | Professional & scientific | 2016 |
| MTG Access Limited | Construction | 2025 |
| MTJ Logistics Ltd | Transport & logistics | 2024 |
| MTS Drainage Solutions Ltd | Administrative & support | 2015 |
| MTS Scotia Ltd | Wholesale & retail | 2024 |
| Mugal Property Ltd | Households | 2025 |
| Muirhead Foods Ltd. | Wholesale & retail | 2006 |
| Muirmedia Creative Services Limited | Professional & scientific | 2022 |
| Mulhern Investments Ltd | Real estate | 2019 |
| Multan Business Ltd | Hospitality | 2019 |
| Munjo Ltd | Transport & logistics | 2024 |
| Munro's Renovation Ltd | Construction | 2026 |
| Munroomalley Ltd | Hospitality | 2024 |
| Murlaan Limited | Hospitality | 2024 |
| Murphy Property Solutions Limited | Real estate | 2025 |
| Murray Lowe Properties Ltd | Real estate | 2025 |
| Murray Plaster & Labour Services Limited | Construction | 2023 |
| Muscle LAB Gym Ltd | Arts & recreation | 2020 |
| Muscle Madness Academy Ltd | Arts & recreation | 2023 |
| Musclewand Ltd | Wholesale & retail | 2026 |
| Muse LAB Spa Ltd | Other services | 2023 |
| Musico Ltd | Wholesale & retail | 2025 |
| MW Moving Estate Agents Ltd | Real estate | 2021 |
| MX24 Ltd | Manufacturing | 2025 |
| My Authentic Self Ltd | Manufacturing | 2024 |
| My Child Portrait Limited | Wholesale & retail | 2020 |
| My First Shop Ltd | Wholesale & retail | 2024 |
| My Two Eyes Ltd | Wholesale & retail | 2019 |
| Mybathroomdesign Limited | Professional & scientific | 2019 |
| MÓ Chroi Travel Ltd | Administrative & support | 2025 |
| N & P Property Limited | Real estate | 2018 |
| N Carter Cosmetics Ltd | Other services | 2026 |
| N D Farmer Ltd | Wholesale & retail | 2022 |
| N H Aesthetic Clinic Ltd | Other services | 2024 |
| N S Dental Ltd | Administrative & support | 2007 |
| N&H Foods Glasgow Ltd | Wholesale & retail | 2026 |
| N.S.N.A Ltd | Wholesale & retail | 2022 |
| NA Prime Ltd | Wholesale & retail | 2026 |
| Nail Order Ltd | Wholesale & retail | 2024 |
| Nanoedge | | 2002 |
| Napier & Craig Limited | Wholesale & retail | 1947 |
| Narrative Marketing Limited | Other services | 2024 |
| Naru Business Ltd | Hospitality | 2012 |
| Naturally Compliant Limited | Professional & scientific | 2016 |
| Nauticare Solutions Ltd | Manufacturing | 2025 |
| Naval Tech Solutions Ltd | Professional & scientific | 2025 |
| Navarch Ltd | Professional & scientific | 2025 |
| Navigare Logistics Limited | Transport & logistics | 2020 |
| NBPCB4 Limited | Information & communication | 2009 |
| Ndsm Ltd | Households | 2025 |
| Neat Project Solutions Limited | Administrative & support | 2011 |
| Negi & Sons Foods Limited | Hospitality | 2014 |
| Neil MAC Ltd | Information & communication | 2006 |
| Neilston Agricultural Society | Agriculture & fishing | 2003 |
| Neilston News Ltd | Wholesale & retail | 2021 |
| NEO Holdings Scotland Ltd | Wholesale & retail | 2012 |
| Neptune AYR Limited | Construction | 2009 |
| Nessworking Limited | Information & communication | 2016 |
| NET Workshop Services Ltd | Wholesale & retail | 2017 |
| Neurobrew Ltd | Wholesale & retail | 2025 |
| Nevis Contracts Ltd | Construction | 2022 |
| Nevis Fitness UK Ltd | Arts & recreation | 2024 |
| Nevis Letting Ltd | Real estate | 2025 |
| New Street Trustees Limited | Financial services | 2011 |
| Newark Development Ltd | Hospitality | 2020 |
| Newmac Asphalt Services Limited | Construction | 1982 |
| Newmac Management Services Limited | Professional & scientific | 2002 |
| Newscot Care Ltd | Health & social care | 2024 |
| Newstreetleisure Limited | Hospitality | 2025 |
| Next GEN Pharma Ltd | Wholesale & retail | 2023 |
| Next Tuesday Pictures Ltd | Information & communication | 2025 |
| Nextgen Leaflets Ltd | Professional & scientific | 2025 |
| Nextpace Ltd | Information & communication | 2024 |
| NH Rentals Ltd | Other services | 2025 |
| NHM (Retail) Limited | Wholesale & retail | 2006 |
| Nibbles Takeaway Ltd | Hospitality | 2020 |
| Nicolson Homes (Mearns) Ltd | Construction | 2025 |
| Nicolson Homes Ltd | Construction | 2025 |
| Nielson Retail Limited | Wholesale & retail | 2017 |
| Ninja UN Limited | Professional & scientific | 2013 |
| Nitropos Solutions Ltd | Other services | 2024 |
| Nitshill Fast Foods Ltd | Hospitality | 2020 |
| NJK Hygiene Experts Ltd | Wholesale & retail | 2025 |
| NJK Loss Adjusters Ltd | Financial services | 2023 |
| NJR Bakes Ltd | Hospitality | 2022 |
| NMG Investments Limited | Real estate | 2008 |
| NO Education Ltd | Other services | 2025 |
| NO10 Flooring Services Limited | Construction | 2023 |
| NO7 Property Ltd | Real estate | 2016 |
| Noble Property Solutions Ltd. | Construction | 2004 |
| Noble Residential Properties Ltd | Construction | 2021 |
| NOE Building Contractors Ltd | Construction | 2022 |
| NOE Coffee Ltd | Hospitality | 2024 |
| Nolan Contracts Ltd. | Manufacturing | 2022 |
| Nomad Cooks Scotland Ltd | Hospitality | 2024 |
| Nomads' Coffee Limited | Hospitality | 2020 |
| Nomnom Asia Ltd | Hospitality | 2025 |
| Noor Cuisine Ltd | Hospitality | 2024 |
| Noremac Ltd | Professional & scientific | 2024 |
| Normanton Properties Limited | Financial services | 2022 |