| MCC Group Ltd | Manufacturing | 2014 |
| MCC Packaging Ltd | Manufacturing | 2015 |
| Mccodeit Limited | Information & communication | 2024 |
| Mccoll's Travel Limited | Transport & logistics | 1996 |
| Mcculloch Marketing Ltd | Manufacturing | 2023 |
| Mcdougall Joinery & Building Ltd | Manufacturing | 2019 |
| Mcginley Property (Scotland) Ltd | Real estate | 2024 |
| Mcglashan Engineering Consultancy Limited | Professional & scientific | 1990 |
| Mcguire Transport (Scotland) Ltd. | Transport & logistics | 2015 |
| Mckmelek Ltd | Other services | 2026 |
| Mclellan Property Ltd | Real estate | 2023 |
| MCNAB1881 Ltd | Administrative & support | 2017 |
| MD Refrigeration & Air Conditioning Ltd | Other services | 2017 |
| Mech Air Engineering Limited | Professional & scientific | 2017 |
| Megan Rainey Beauty Ltd | Other services | 2021 |
| Meiser (UK) Limited | Manufacturing | 1996 |
| Mercury Innovation Consultants Ltd | Information & communication | 2020 |
| MEW Rail Ltd | Construction | 2019 |
| Mian Trading Ltd | Wholesale & retail | 2009 |
| Mills Couture Limited | Wholesale & retail | 2025 |
| Mills Packaging Limited | Manufacturing | 2012 |
| Miltonduff Distillery Limited | Professional & scientific | 1897 |
| Mimo Wigs Ltd | Wholesale & retail | 2017 |
| Mind, Body and Movement Studio Ltd | Other services | 2019 |
| Mirha & Associates Ltd | Wholesale & retail | 2026 |
| Mitchell Property Specialists Ltd | Construction | 2019 |
| Mobile Services Ltd | Wholesale & retail | 2020 |
| Mobitell Ltd | Wholesale & retail | 2023 |
| Monsta Media Glasgow West Ltd | Professional & scientific | 2025 |
| More Life Coaching Ltd | Education | 2023 |
| Move IT Strathclyde Ltd | Transport & logistics | 2010 |
| MR Commissioning Services Ltd | Construction | 2018 |
| MRM Training Consultancy Ltd | Health & social care | 2013 |
| Muir Mackenzie & Company Limited | Professional & scientific | 1933 |
| Mulben Warehouses Limited | Professional & scientific | 1931 |
| Munros Maintenance Ltd | Administrative & support | 2025 |
| Murroch Designs Ltd | Professional & scientific | 2025 |
| Myfishpro Ltd | Hospitality | 2024 |
| Nailcraft Official Ltd | Wholesale & retail | 2024 |
| Neeson Macdonald International Management Consultants Ltd. | Administrative & support | 1999 |
| Nemo Jatt Ltd | Hospitality | 2024 |
| NEVER86 Limited | Hospitality | 2019 |
| New Look Dumbarton Ltd | Other services | 2024 |
| New Red CAP Ltd | Hospitality | 2025 |
| Nicola Anne Property Ltd | Real estate | 2025 |
| Nimbustech Ltd | Information & communication | 2026 |
| Noble Project Solutions Ltd | Professional & scientific | 2025 |
| Nomad Overland Campers Ltd | Administrative & support | 2019 |
| Nonhebel Enterprises Ltd. | Construction | 2004 |
| Noremac Skips Limited | Water & waste | 2004 |
| Nova Property Media Ltd | Information & communication | 2026 |
| Nursery Rhymes Childcare Ltd. | Health & social care | 2007 |
| Nxtgenuk Ltd | Information & communication | 2026 |
| Obscura Productions Ltd | Information & communication | 2025 |
| Oclevents Ltd | Administrative & support | 2025 |
| Ollnam Ltd | Administrative & support | 2020 |
| Onetrad Limited | Administrative & support | 2011 |
| Opal Contracts Limited | Construction | 2025 |
| Opos Group Ltd | Administrative & support | 2018 |
| Opos Limited | Administrative & support | 2008 |
| Optimumbms Ltd | Construction | 2006 |
| Optometry Scotland Limited | Other services | 2024 |
| Opulent Hair Styling Ltd | Other services | 2023 |
| Orka Homes UK Limited | Real estate | 2014 |
| Orla's Painters Limited | Construction | 2018 |
| Osprey Heating and Plumbing Ltd | Construction | 2020 |
| Oswald Mechanical Maintenance Services Ltd | Manufacturing | 2022 |
| OUR Next Home Limited | Real estate | 2022 |
| OUR Promise Ltd | Health & social care | 2022 |
| Overtoun House | Hospitality | 2001 |
| Owaisco Ltd | Real estate | 2026 |
| P J Heaney Ltd | Professional & scientific | 2026 |
| P Thomson Builders Ltd | Construction | 2026 |
| P.D Deer and Wildlife Management Services Ltd | Administrative & support | 2026 |
| Pabuli UK Limited | Information & communication | 2025 |
| Paragon Property Renovations Ltd | Construction | 2023 |
| Passport (Whisky) Limited | Professional & scientific | 2016 |
| Paul Maloy PGS Ltd | Energy | 2023 |
| Pcin Limited | Real estate | 2020 |
| Peak Clothing Ltd | Wholesale & retail | 2024 |
| Pelan Limited | Health & social care | 1996 |
| People at Work HR Consultancy Ltd | Administrative & support | 2018 |
| Ph&Cs Ltd | Health & social care | 2023 |
| PHG Solutions Limited | Construction | 2018 |
| Pimay Ltd | Administrative & support | 2025 |
| Pitch Property Ltd | Real estate | 2025 |
| Pixel Perfect Designs by Nicola Ltd | Professional & scientific | 2025 |
| Pjcw Projects Ltd | Professional & scientific | 2023 |
| Planecycle Limited | Administrative & support | 2001 |
| Pmpr Excellence Ltd. | Professional & scientific | 2008 |
| Pola Engineering Ltd | Professional & scientific | 2024 |
| Polsec Group Ltd. | Administrative & support | 2020 |
| Portloch Limited | Real estate | 2004 |
| PR Newco 7 Limited | Professional & scientific | 2016 |
| PR Shelfco 2 2023 Limited | Professional & scientific | 1933 |
| PR Shelfco 2023 Limited | Professional & scientific | 1988 |
| Precision Eyecare Ltd | Health & social care | 2025 |
| PRH (Scotland) Limited | Professional & scientific | 2012 |
| Pritchard Turbine Controls Ltd | Professional & scientific | 2019 |
| Protile Supplies Scot Ltd | Construction | 2025 |