| Mezuzah Developments Limited | Construction | 2020 |
| MFA SPV Ltd | Information & communication | 2016 |
| MG Dent Ltd | Health & social care | 2010 |
| MGH Joiners Ltd | Construction | 2024 |
| MGL (Scot) Ltd | Construction | 2023 |
| MGM 28 Consulting Ltd | Information & communication | 2025 |
| MGM Hoses Ltd | Wholesale & retail | 2013 |
| MGS Foods Limited | Hospitality | 2018 |
| MHR Financial Services Ltd | Financial services | 2019 |
| Mhsl Services Limited | Administrative & support | 2007 |
| Mhòr Training Limited | Professional & scientific | 2022 |
| Micaas Limited | Information & communication | 2020 |
| Michael Property Consultancy Limited | Professional & scientific | 2015 |
| Michelle United Limited | Other services | 2014 |
| Micon (MCS) Ltd | Professional & scientific | 2022 |
| Middleton Kennels Ltd | Agriculture & fishing | 2025 |
| Midlife Confidence Club Ltd | Information & communication | 2025 |
| Midows Limited | Extraterritorial | 2025 |
| Miint Cleaning (Scotland) Ltd | Administrative & support | 2022 |
| Miint Cleaning Limited | Administrative & support | 2024 |
| Mika Hairdressing Limited | Arts & recreation | 2007 |
| Mill Magazine Ltd | Information & communication | 2018 |
| Millan Services Limited | Administrative & support | 2003 |
| Millennium Executive Travel Ltd | Transport & logistics | 2017 |
| Miller Joinery & Shopfitting Limited | Construction | 2012 |
| Miller Site Services Limited | Construction | 2015 |
| Millfield Developments Limited | Construction | 2018 |
| Milligan Marine Ltd | Transport & logistics | 2021 |
| Millionaire Hair (Scotland) Ltd | Other services | 2018 |
| Mills Kebab City Ltd | Hospitality | 2024 |
| Milou Auto Ltd | Wholesale & retail | 2025 |
| Milroy Chemical Company Limited (the) | Manufacturing | 1916 |
| Milton Newsagents Ltd | Wholesale & retail | 2011 |
| Mind Marvels Ltd | Health & social care | 2019 |
| Mindo Ltd | Transport & logistics | 2025 |
| Minds Join Ltd | Information & communication | 2026 |
| Mini Market Paisley Ltd | Wholesale & retail | 2026 |
| Minni Minors Shop Ltd | Wholesale & retail | 2025 |
| MIR Nexusphere Ltd | Wholesale & retail | 2024 |
| Mirren Property Company Limited | Administrative & support | 2016 |
| Mirren Property Services Ltd | Construction | 2010 |
| Mirren Travel Management Ltd | Administrative & support | 2022 |
| Mitchell Installs Limited | Real estate | 2022 |
| MJ Storage Installation Ltd | Construction | 2019 |
| MJC Law (Scotland) Ltd | Professional & scientific | 2019 |
| MJD Systems Ltd. | Information & communication | 2003 |
| Mjjo Limited | Real estate | 2021 |
| MJT16 Properties Limited | Real estate | 2023 |
| MK Business Psychology Limited | Professional & scientific | 2010 |
| MK Scaffolds Ltd | Construction | 2025 |
| MK Solar Solutions Ltd | Construction | 2023 |
| ML Electrical Rewiring Ltd | Construction | 2021 |
| MLC Media Ltd | Information & communication | 2024 |
| MLC Production Company Limited | Information & communication | 2019 |
| Mmcgrath Properties Ltd | Households | 2024 |
| MME Electrical Service Ltd. | Construction | 2009 |
| Mmmultitude Limited | Professional & scientific | 2004 |
| MMN Grocer Ltd | Wholesale & retail | 2024 |
| Mmrecycling CIC | Water & waste | 2026 |
| Mmxxvco Ltd | Administrative & support | 2025 |
| Moana Holdings Ltd | Real estate | 2021 |
| Mobo Sports Management (UK) Limited | Arts & recreation | 2018 |
| Mochef Limited | Hospitality | 2016 |
| Modutti Ltd | Wholesale & retail | 2020 |
| Mohawk Tattoo Studio Ltd | Other services | 2015 |
| Moji's Burger Ltd | Hospitality | 2024 |
| Moji's Burgers 26 Ltd | Hospitality | 2026 |
| Molmax Solutions Ltd | Professional & scientific | 2020 |
| Mont Supplies Limited | Wholesale & retail | 2019 |
| Montgomery Jones Limited | Professional & scientific | 2016 |
| Moon and Back Paisley CIC | Wholesale & retail | 2025 |
| Moore Plumbing & Heating Services (Scotland) Ltd | Construction | 2011 |
| Moowooit Ltd | Wholesale & retail | 2025 |
| Moransh Financial Services Limited | Financial services | 2023 |
| Morrisons BED Centre Limited | Wholesale & retail | 2011 |
| Morrisons Furniture Limited | Wholesale & retail | 2013 |
| Mortgage Information Bureau Ltd | Financial services | 2020 |
| Mortgagewise (Scotland) Ltd | Financial services | 2019 |
| Morton Style Ltd | Wholesale & retail | 2026 |
| MOS Multisave Ltd | Wholesale & retail | 2023 |
| Moseley Marine Services Ltd | Professional & scientific | 2017 |
| Moss Street Properties Limited | Real estate | 2018 |
| Mossedge Development Limited | Wholesale & retail | 2016 |
| Mossedge Paisley Ltd | Professional & scientific | 2026 |
| Mossie & Strathern Limited | Wholesale & retail | 1996 |
| Mothering Miracles CIC | Hospitality | 2025 |
| Moto Car Wash Ltd | Administrative & support | 2025 |
| Move Harmony Ltd | Transport & logistics | 2024 |
| MP Green Energy Solutions Ltd | Manufacturing | 2022 |
| MPC Executive Search Services Ltd. | Professional & scientific | 1999 |
| MPE Electrical Services Ltd | Construction | 2022 |
| MPS Commercial Repair Ltd | Manufacturing | 2025 |
| MR Bathrooms (Scotland) Ltd. | Wholesale & retail | 2011 |
| MR Lock UP Unit Ltd | Transport & logistics | 2021 |
| MR Tech Vision Ltd | Information & communication | 2024 |
| Msbl Ltd | Construction | 2018 |
| MSJ Software Holdings Limited | Professional & scientific | 2019 |
| MSM Executors Limited | Professional & scientific | 2026 |
| MSM Paisley Holdings Limited | Financial services | 2025 |
| MSM Solicitors Limited | Professional & scientific | 2014 |