| Michael Carol Ltd | Peterhead | 2017 |
| Michael Chown Ruminant Consultancy Plus Ltd | Devon | 2011 |
| Michael Clark 22 Ltd. | Fraserburgh | 2006 |
| Michael Denney (Soil Nutrition) Ltd | Altrincham | 2008 |
| Michael Grange Limited | Chippenham | 2011 |
| Michael H Keene & SON Limited | Newent | 1963 |
| Michael Hartnell Nurseries Ltd | Evesham | 2024 |
| Michael J Lumsden Limited | | 2007 |
| Michael Johnson Tree Surgery Ltd | Uttoxeter | 2013 |
| Michael Lawrence Landcrafts Limited | Newbury | 2002 |
| Michael Lomax Limited | Lancashire | 2002 |
| Michael Macgregor Photography Limited | Argyll | 2004 |
| Michael Mackenzie Enterprises Ltd | Elgin | 2025 |
| Michael Mallinson Limited | Halifax | 1970 |
| Michael Murphy Pre-Training Ltd | Newmarket | 2019 |
| Michael Murray | Randalstown | 2019 |
| Michael Nightingale & Co. Limited | London | 1956 |
| Michael Osgerby (Agriculture) Limited | Hull | 1984 |
| Michael Pritchett Limited | Stroud | 1961 |
| Michael Ramage Forestry Ltd | Kelso | 2017 |
| Michael S. Sands Limited | Perth | 2002 |
| Michael Taylor Associates Limited | Billingshurst | 1989 |
| Michael Wilson Fishing Limited | Buckie | 2017 |
| Michael Youngs Bloodstock Consultancy Ltd | Wokingham | 2016 |
| Michaelchurch Farming Limited | Tunbridge Wells | 1998 |
| Michaelmas Farming Limited | Cirencester | 1996 |
| Michaelwood Dairy Goats Limited | Bristol | 2012 |
| Michelmersh Manor Farm Limited | Romsey | 2011 |
| Mick Cooper Arboricultural Consultants Ltd | Doncaster | 2015 |
| Mick Richards Ltd. | York | 2010 |
| Mickle Hill Trading Ltd | Hinckley | 2018 |
| Micklethwaite Farm | Wigton | 2008 |
| Micklewood Dairy Farm Ltd | Shrewsbury | 2025 |
| Mickley Stud Limited | Market Drayton | 2005 |
| Micofish Limited | Fraserburgh | 2003 |
| Micontrac Ltd | Bury St. Edmunds | 2012 |
| Micro Salads Ltd | Hull | 2024 |
| Microbial Distribution Limited | Preston | 2015 |
| Microbiotech Ltd | Pershore | 2017 |
| Microchem Foods Limited | Bradford | 2019 |
| Microgreens Ltd | Dundee | 2025 |
| Microgreens of Nottingham Ltd | Nottingham | 2024 |
| Microgrow Systems Limited | Glasgow | 2017 |
| Micropropagation Services (E.M.) Limited | Loughborough | 1985 |
| Microsite Ltd | Durham | 2023 |
| Microworld Wast Management Ltd | Greenford | 2019 |
| MID Antrim Hunt Club Limited | Ballymena | 1972 |
| MID Ascog Limited | Isle Of Bute | 2022 |
| MID Auchencloich Ltd | Kilbarchan | 2021 |
| MID Counties Liming & Soil Analysis Limited | Droitwich | 2024 |
| MID Cowden Farm Ltd | Crieff | 2023 |
| MID Downs Agricultural Services Limited | Nr Uckfield | 2015 |
| MID Kent Fisheries Limited | Ashford | 2002 |
| MID Somerset Forestry Limited | Taunton | 2014 |
| MID Suffolk Poultry Limited | Eye | 2003 |
| MID Surrey Tree Surgery Contractors Limited | Woking | 2015 |
| MID Sutherland Community Land Trust Ltd | Lairg | 2025 |
| MID Wales EGG Packing Limited | Birmingham | 2009 |
| MID Wales Harvesting Ltd | Stoke Prior | 2015 |
| MID Wales Incineration Limited | Builth Wells | 2005 |
| MID Wales Renewables Limited | Welshpool | 2015 |
| Mid-Norfolk Pheasantries Limited | Dereham | 2013 |
| Midalton Ltd | Leicester | 2023 |
| Middle Brampton Farm Limited | Ross-On-Wye | 2025 |
| Middle Caves Ltd | Richmond | 2003 |
| Middle England Farm Ltd | Alcester | 2021 |
| Middle Farm (HG3) Limited | Ripon | 2019 |
| Middle Farm (Hinxworth) Ltd | Baldock | 2007 |
| Middle Farm Enterprises Limited | Barnard Castle | 2022 |
| Middle Farm Livery Ltd | Oxford | 2023 |
| Middle Farm Poultry Limited | Exeter | 2025 |
| Middle Farms Limited | Bristol | 2004 |
| Middle Ground Growers C.I.C. | Bath | 2021 |
| Middle Hall Farms Limited | Glous | 2003 |
| Middle Hook Farm Limited | Narberth | 2005 |
| Middle Marwood Ltd | Braunton | 2025 |
| Middle Moor Farm Limited | Crediton | 2013 |
| Middle North Coombe Farm Limited | Tiverton | 2005 |
| Middle Palace Ltd | Cleator | 2023 |
| Middle Stobswood Farm Limited | Morpeth | 2018 |
| Middle Trelan Farm Ltd | Falmouth | 2024 |
| Middle World Farms CIC | Lincoln | 2026 |
| Middlebank Farming Company Limited | Dunfermline | 2020 |
| Middlecombe Nursery Limited | Bristol | 2007 |
| Middlecot Stables Ltd | Staines-Upon-Thames | 2019 |
| Middlefield Farm Limited | Stockton-On-Tees | 2025 |
| Middleheads Limited | Consett | 2012 |
| Middlehowe Farms Ltd | Beverley | 2017 |
| Middlemore Tree Surgery Ltd | Bromsgrove | 2023 |
| Middlepart Limited | Ayrshire | 2004 |
| Middleshaw Country Enterprises Limited | Lockerbie | 2011 |
| Middleton Farms (Scotland) Ltd. | Aberdeen | 2020 |
| Middleton Kennels Ltd | Paisley | 2025 |
| Middleton Livery Ltd | Northampton | 2026 |
| Middleton Livestock Ltd | Leyburn | 2025 |
| Middleton-Taylor Associates Limited | Malmesbury | 2013 |
| Middletweed Limited | Selkirk | 1980 |
| Middlewood Livery Ltd | Stockport | 2018 |
| Midfield Limited | Doncaster | 1994 |
| Midgard Tree Services Ltd | Waterlooville | 2023 |