| Montpellier Street Limited | Wholesale & retail | 2025 |
| Montserrat Travel & Tours Ltd | Administrative & support | 2019 |
| Monty Digital Limited | Information & communication | 2022 |
| Monumental Masonry Worcester Ltd | Wholesale & retail | 2025 |
| Moodx Ltd | Wholesale & retail | 2020 |
| Moody Stowe Talent Ltd | Professional & scientific | 2025 |
| Moor Court (Whitbourne) Residents Company Limited | Administrative & support | 2007 |
| Moore Accounting Solutions Limited | Professional & scientific | 2025 |
| Moorlands Studios Limited | Professional & scientific | 2006 |
| Moose Projects Ltd | Professional & scientific | 2022 |
| Mootor Limited | Real estate | 2024 |
| Mordiford Mill Ltd | Manufacturing | 2025 |
| More Experts Fast Limited | Professional & scientific | 2023 |
| More IS More Ltd | Information & communication | 2018 |
| Moreish Marketing Ltd | Professional & scientific | 2010 |
| Morgan APS Sales & Lettings LLP | | 2014 |
| Morgan Charterhouse Limited | Administrative & support | 2011 |
| Morgan Consultancy Limited | Professional & scientific | 2022 |
| Morgan Craig Limited | Wholesale & retail | 2023 |
| Morgan Hilaire Ltd | Arts & recreation | 2023 |
| Morgan Service Limited | Manufacturing | 1977 |
| Moriel Specialist Care Group Limited | Health & social care | 2025 |
| Morley Construction Developments Ltd | Construction | 2021 |
| Morpa UK Ltd | Real estate | 2024 |
| Morpheus Computers Limited | Other services | 2014 |
| Morrells Handwriting Limited | Professional & scientific | 2012 |
| Mortgageexpertsuk Ltd | Financial services | 2024 |
| Mortgages Plain and Simple Ltd | Real estate | 2016 |
| Mosaic Bookkeeping Limited | Professional & scientific | 2026 |
| Moss Monster Ltd | Construction | 2021 |
| Mossland & Transport Ltd | Wholesale & retail | 2016 |
| Mosu Limited | Other services | 2021 |
| Motelrocks Facilities Limited | Wholesale & retail | 2006 |
| Motelrocks Group Limited | Wholesale & retail | 2005 |
| Motelrocks Holdings Limited | Wholesale & retail | 2016 |
| Motelrocks UK Ltd | Wholesale & retail | 2009 |
| Motelrocks Wholesale Limited | Wholesale & retail | 2000 |
| Motivate Medical Communications Limited | Professional & scientific | 2015 |
| Moto's Mobile Massage Limited | Other services | 2002 |
| Motormann Ltd | Wholesale & retail | 2009 |
| Motorspark Vehicles Ltd | Wholesale & retail | 2023 |
| MOTOV8 | Administrative & support | 2004 |
| Mount Pleasant Group Limited | Real estate | 2025 |
| Mount Pleasant Inn Limited | Hospitality | 2025 |
| Mount Pleasant Trading Limited | Hospitality | 2025 |
| Mountis Takeaway Worcester Ltd | Hospitality | 2023 |
| MOV Suppliers Ltd | Wholesale & retail | 2025 |
| Moveco Limited | Transport & logistics | 2015 |
| Moxington Ltd | Arts & recreation | 2019 |
| Mozaic Development Limited | Construction | 2007 |
| MP Reversions (NO.9) Limited | Real estate | 2009 |
| Mpests Ltd | Hospitality | 2022 |
| MPG Transport Limited | Transport & logistics | 2018 |
| Mplant Holdings Ltd | Construction | 2017 |
| MR (Site Services) Limited | Construction | 2005 |
| MR D'S of Worcester Ltd | Wholesale & retail | 2025 |
| MR D'S Olde Sweet Shop Ltd | Wholesale & retail | 2022 |
| MR JON Luscombe Limited | Health & social care | 2026 |
| MR Medics Limited | Health & social care | 2023 |
| MR Plumbing Supplies Ltd | Wholesale & retail | 2023 |
| MR Portobello Limited | Wholesale & retail | 2019 |
| MR Tee's Icecream and Desserts Shrewsbury Ltd | Hospitality | 2025 |
| MR24HOURPLUMBER Ltd | Construction | 2023 |
| MRB Commercials Limited | Wholesale & retail | 2016 |
| Mreana Limited | Transport & logistics | 2018 |
| MRF Associates Limited | Administrative & support | 2020 |
| Mrfcq Financial Services Limited | Financial services | 2025 |
| MRH Care Solutions Limited | Health & social care | 2024 |
| MRM Installation Limited | Construction | 2023 |
| MRP Digital Ltd | Information & communication | 2025 |
| MRP Family Group Limited | Financial services | 2025 |
| MRR (Reading) Limited | Other services | 2012 |
| MRT Electrical Services Limited | Construction | 2010 |
| MS Auto FIX Ltd | Wholesale & retail | 2026 |
| MSK Properties Worcester Ltd | Real estate | 2024 |
| MSM Forklift Services Ltd | Wholesale & retail | 2007 |
| MSM Veterinary Services Ltd | Professional & scientific | 2020 |
| Msm/Drh Limited | Wholesale & retail | 1984 |
| MSM4 Limited | Real estate | 2019 |
| MSN Auto Limited | Transport & logistics | 2018 |
| MT Catheter Technologies Ltd | Manufacturing | 2013 |
| MT Keys Property Limited | Real estate | 2022 |
| MTA Accountancy Limited | Professional & scientific | 2019 |
| MTB Solutions Limited | Construction | 2015 |
| MTC Buildings Ltd | Wholesale & retail | 2025 |
| MTD Building Contractors Ltd | Construction | 2025 |
| MTD for Individuals Limited | Professional & scientific | 2025 |
| MTD Midco Limited | Financial services | 2025 |
| MTD Worcester Limited | Professional & scientific | 2025 |
| MTG Europe Limited | Professional & scientific | 2005 |
| Mthomas Consulting Ltd | Professional & scientific | 2025 |
| MTK Facility Services Ltd | Administrative & support | 2024 |
| MTM a Retail Ltd | Wholesale & retail | 2026 |
| MTM Building Solutions Ltd | Construction | 2021 |
| MTS Staffing Limited | Administrative & support | 2024 |
| MTW Couriers Limited | Transport & logistics | 2014 |
| Muddy Creations Smallholding CIC | Health & social care | 2024 |
| Mudson Limited | Real estate | 2023 |
| MUEEZ24 Ltd | Manufacturing | 2023 |
| Mullins Trading Ltd | Hospitality | 2026 |