| Muttropolis Ltd | Rhyl | 2026 |
| MV & JM Davies & SON Ltd | Builth Wells | 2013 |
| MV Daisy Limited | | 2007 |
| MV Devotion Limited | Peterhead | 2025 |
| MV Good Intent LK120 Ltd | Yell | 2019 |
| MV Gracious Limited | Peterhead | 2019 |
| MV Rural Services Ltd | Okehampton | 2024 |
| MV Services (Banff) Limited | Banff | 2018 |
| MVH Farming Company | Newark | 2011 |
| MW Agri Limited | Berkhamsted | 2003 |
| MW ARB & Rail Ltd | Peterborough | 2023 |
| MW ARB Limited | Stone | 2024 |
| MW Bloodstock Limited | Hungerford | 2024 |
| MW Dog Grooming Ltd | Southampton | 2023 |
| MW Equine Shoeing Services Limited | Camberley | 2016 |
| MW Farm Trading Ltd | Ormskirk | 2018 |
| MW Fishing Limited | Brixham | 2023 |
| MW Flail and Forestry Limited | Bradford | 2023 |
| MW Forestry Ltd | Newport | 2015 |
| MW Graham Ltd | Enniskillen | 2014 |
| MW Home Farm Ltd | Henley-On-Thames | 2024 |
| MW Marine & Offshore Ltd | Benfleet | 2008 |
| MW Prans Ltd | Banff | 2023 |
| MW Shellfish Limited | Montrose | 2019 |
| MW Stables Ltd | Tunbridge Wells | 2026 |
| MW Turfcare Ltd | Littlehampton | 2024 |
| MW Working Dogs Ltd | Barrow-In-Furness | 2024 |
| Mwanaka Fresh Farm Foods Limited | Cambridge | 2025 |
| MWB Farms Limited | Dumfries | 2019 |
| MWF Management Ltd | Bridgnorth | 2025 |
| MWG Specialist Marine Services Limited | Poole | 2017 |
| MWS Contracting Ltd | Kilmarnock | 2023 |
| MWU Tree Services Ltd | Andover | 2018 |
| MWW Farms Limited | Birmingham | 2017 |
| MX Unique Limited | Macclesfield | 2026 |
| My Animal Trace Ltd | Rochdale | 2021 |
| My Campsite Ltd | Canterbury | 2025 |
| My Cotswold Garden Ltd | Moreton In Marsh | 2013 |
| My Cottage Farm Ltd | Birmingham | 2012 |
| My Dog Field Ltd | Radcliffe | 2020 |
| My Eggs Ltd | Alford | 2026 |
| My Little Farm Limited | Hassocks | 2020 |
| My Little Farmacy Ltd | London | 2023 |
| My Little Wool Company Limited | Edinburgh | 2025 |
| My Mushrooms Ltd | Nottingham | 2025 |
| My Organic Food Store Limited | London | 2021 |
| My Patch Ltd | Bath | 2012 |
| My Tree Care Limited | Hornchurch | 2016 |
| My Vertical Farm Ltd | Malton | 2025 |
| My Vineyard Limited | Teddington | 2014 |
| My Woodshop Limited | Brechin | 2018 |
| My World Ltd | Romford | 2021 |
| My-Shrooms Limited | Newton Abbot | 2023 |
| MYA Mariculture Ltd | London | 2020 |
| Myaku Scotland Ltd | Tarbert | 2018 |
| MYALUJOK9 Services Limited | Sandbach | 2021 |
| Myco Fracture Technologies Limited | Aberdeen | 2026 |
| Myco Manchester Community Interest Company | Manchester | 2022 |
| Myco Manchester Mushroom Ltd | Manchester | 2020 |
| Myco Mart Ltd | Lincoln | 2025 |
| Myco-Farms Ltd | Craigavon | 2025 |
| Mycobardsley Ltd | Preston | 2025 |
| Mycobee Mushrooms C.I.C. | Edinburgh | 2019 |
| Mycobiome Ltd | Bristol | 2024 |
| Mycock Farming Ltd | Rugeley | 2018 |
| Mycocks Agri Ltd | Buxton | 2014 |
| Mycolab Supplies Ltd | London | 2023 |
| Mycologic Ltd | Holsworthy | 2020 |
| Mycophile Limited | Harrogate | 2026 |
| Mycorrhizal Systems Ltd | Accrington | 2005 |
| Mycosiauk CIC | Derby | 2024 |
| Mycoted Ltd | Stoke-On-Trent | 2003 |
| Mycotek Ltd | Chelmsford | 2021 |
| Mycrogreens Ltd | Bristol | 2025 |
| Mydreamhorse Ltd | Northampton | 2021 |
| Myfarm Ltd | Glasgow | 2023 |
| Myfd Farming Limited | Salisbury | 2025 |
| Mylah Farm Limited | Clitheroe | 2024 |
| Mylovecoons Ltd | Evesham | 2026 |
| Mynachdy Grass Converters Limited | Anglesey | 2014 |
| Mynache Farm Ltd | Crymych | 2022 |
| Mynde Farms Limited | Hereford | 1996 |
| Mynthurst Estates Limited | Wotton-Under-Edge | 2021 |
| Mynydd Lliw Common Land Limited | Swansea | 2000 |
| Mynydd Mallaen CBC | Llandovery | 2021 |
| Mynydd Timber Service Limited | Bangor | 2004 |
| MYR Limited | Monmouth | 2003 |
| Myrddin Heritage Ltd | Carmarthen | 2017 |
| Myreside Willow Limited | Haddington | 2013 |
| Myreton Farms Limited | Insch | 2016 |
| Myriad Bloodstock & Communications Limited | Hungerford | 1999 |
| Myronko Leisure Ltd | Chesterfield | 2006 |
| Myrtle Earth Farm Limited | Rossendale | 2024 |
| Myrtle Grove Farm Ltd | Bradford | 2025 |
| Myrtle Holdings Welland Ltd | Malvern | 2023 |
| Myrtle Smallholding Limited | Hartlebury | 2023 |
| Myrtle Stables Limited | Littlehampton | 2022 |
| Myrtledash Gundogs Limited | Weston-Super-Mare | 2025 |
| Myspires Stallions Ltd | Bexhill-On-Sea | 2025 |
| Mysterious Capital Limited | Kington | 2021 |