| MTC Games Ltd | Manufacturing | 2023 |
| Mtechie Digital Ltd | Information & communication | 2023 |
| Mtel (Scotland) Limited | Professional & scientific | 2001 |
| Mtel Property Ltd | Real estate | 2025 |
| Mtez Development LP | | 2016 |
| MTH Building & Maintenance Limited | Construction | 2012 |
| MTH Eleven Ltd | Arts & recreation | 2026 |
| MTH Fourteen Ltd | Information & communication | 2026 |
| MTH TEN Ltd | Arts & recreation | 2025 |
| MTH Thirteen Ltd | Information & communication | 2026 |
| MTH Tupperware Party Ltd | Information & communication | 2016 |
| MTH Twelve Ltd | Information & communication | 2026 |
| MTI Technology Limited | Information & communication | 1988 |
| MTI UPF Coinvest SLP | | 2008 |
| MTI UPF Founder Partner SLP | | 2008 |
| MTI UPF General Partner SLP | | 2008 |
| MTI Ventures Founders Limited Partnership | | 1990 |
| Mtlc International LP | | 2015 |
| MTM Concepts Ltd | Manufacturing | 2021 |
| Mtnwave Fitness Limited | Education | 2024 |
| MTP Group LP | | 2018 |
| MTS (Scotland) Limited | Transport & logistics | 2013 |
| MTS Corp. LP | | 2014 |
| Mtts Services Limited | Administrative & support | 2024 |
| MTX Overseas LP | | 2016 |
| Muave Limited | Manufacturing | 2020 |
| Muay Thai JAM Limited | Arts & recreation | 2018 |
| Mubarak Dental Limited | Health & social care | 2021 |
| Muckery Ltd | Information & communication | 2023 |
| Muckle Brig Limited | Manufacturing | 2014 |
| Muckle Media Ltd | Professional & scientific | 2012 |
| Mudco Limited | Wholesale & retail | 2019 |
| Muddy Play Limited | Manufacturing | 2019 |
| Mudside Management LP | | 2012 |
| Mugur Trading LP | | 2016 |
| Muhammad Dawood Ltd | Wholesale & retail | 2026 |
| MUI Ltd | Hospitality | 2024 |
| Muihua Limited | Health & social care | 2024 |
| Muir Mhòr Offshore Wind Farm Limited | Energy | 2021 |
| Muir Turner Enterprises Ltd | Information & communication | 2024 |
| Muir Welding & Fabrication Ltd | Manufacturing | 2025 |
| Muirake Wind Farm Limited | Energy | 2010 |
| Muirdair 2 LP | | 2013 |
| Muirdair Limited Partnership | | 2010 |
| Muirdale Real Estate Limited | Real estate | 2023 |
| Muirfield Homes Limited | Construction | 1989 |
| Muirfield House Owners Ltd | Households | 2025 |
| Muirgate Properties | Real estate | 1989 |
| Muirhall WF Extension 1 Limited | Energy | 2015 |
| Muirheadburn Wind Farm Limited | Energy | 2025 |
| Muirhouse Homes Limited | Real estate | 2014 |
| Muirhouse Youth Development Group | Education | 2009 |
| Muirleigh Ltd | Manufacturing | 2026 |
| Muji Travel Ltd | Administrative & support | 2023 |
| Mujian CIC | Professional & scientific | 2025 |
| Mulai Media LP | | 2022 |
| Mulasca Ltd | Wholesale & retail | 2025 |
| Mulasta Management LP | | 2015 |
| Mulbeck Projects Ltd | Construction | 2025 |
| Mulberry House (Complementary Healthcare) Ltd. | Education | 2003 |
| Mull Moments Ltd | Real estate | 2017 |
| Muller & Fischer Geneva Strategic Intelligence Group Limited | Information & communication | 2026 |
| Mullet Ventures Ltd | Information & communication | 2025 |
| Mulligan Publishing Ltd. | Administrative & support | 2006 |
| Mulligans Properties Limited | Real estate | 2024 |
| Multex Industries L.P. | | 2015 |
| Multi Business Media Ltd | Professional & scientific | 2018 |
| Multi Tech Investment LP | | 2017 |
| Multi-Achiever LP | | 2015 |
| Multi-Cultural Family Base | Education | 2003 |
| Multi-Fleet Services Ltd. | Wholesale & retail | 1996 |
| Multi-Threads Ltd | Information & communication | 2017 |
| Multibiz Management LP | | 2014 |
| Multicon Solutions LP | | 2016 |
| Multicopy Estate LP | | 2015 |
| Multicorp Alliance LP | | 2015 |
| Multicorp L.P. | | 2009 |
| Multifleet Hire Limited | Administrative & support | 2020 |
| Multifleet Services HC Limited | Financial services | 2021 |
| Multiflex Contracts L.P. | | 2015 |
| Multilink Business LP | | 2016 |
| Multimodal Transport Systems L.P. | | 2008 |
| Multinational Commerce LP | | 2015 |
| Multipass BCI Ltd | Financial services | 2019 |
| Multiple Technology Systems Limited | Information & communication | 2025 |
| Multiply (UK) Limited | Professional & scientific | 2003 |
| Multiply Estate LP | | 2015 |
| Multipower LP | | 2016 |
| Multiprint (Scotland) Limited | Manufacturing | 2009 |
| Multiscale Labs Ltd | Professional & scientific | 2024 |
| Multistep Consulting LP | | 2019 |
| Multistone & Co | | 1993 |
| Multistone Granite LP | | 2006 |
| Multiverso Ltd | Information & communication | 2023 |
| Multiwaste Limited | Water & waste | 2007 |
| Multon (Edinburgh) Holdings Limited | Real estate | 2024 |
| Multon (Edinburgh) Limited | Real estate | 2024 |
| Multon Inc. Ltd | Professional & scientific | 2026 |
| Munchiimon Studio LLP | | 2022 |
| Munden SLP | | 1998 |