| Moss Brook Equestrian Limited | Manchester | 1994 |
| Moss Carr Environmental Ltd | Doncaster | 2018 |
| Moss Energy Limited | Lanark | 2020 |
| Moss Hall Management Company Limited | Preston | 2003 |
| Moss Hill Mushrooms Ltd | Darwen | 2023 |
| Moss Knowe Farm Limited | Carlisle | 2025 |
| Moss Lane Farm & Sons Limited | Manchester | 2018 |
| Moss Lane Stables Ltd | Poulton Le Fylde | 2003 |
| Moss Meadow Farm Ltd | Bacup | 2018 |
| Moss Nook Farm Ltd | Burnley | 2021 |
| Moss Nook Honey Ltd | Ormskirk | 2023 |
| Moss Nurseries Ltd | Trafford Park | 2025 |
| Moss Oaks Group Limited | Knutsford | 2023 |
| Moss Road Garden Centre Ltd | Congleton | 2024 |
| Moss Rose Piggeries Limited | Marton | 1963 |
| Moss Side House | Wigton | 2008 |
| Moss Wood Growers Limited | Preston | 2021 |
| Moss-Field Farm Ltd. | Stirling | 2015 |
| Moss-Side Farm Ltd | Turriff | 2023 |
| Mossflower Farm Ltd | Lugton | 2022 |
| Mossholm Farming Company Limited | Dumfriesshire | 1989 |
| Mossman Farming Limited | Ceredigion | 2011 |
| Mossneuk Farm (Foreside) Limited | By Neilston | 2001 |
| Mosspark Estates Ltd | Dumfries | 2020 |
| Mosston Muir Farm Limited | Forfar | 2015 |
| Mosstower Limited | Kelso | 2012 |
| Mossview Farms Ltd | Ballymena | 2020 |
| Mosswood Hall Farm Limited | Chester | 2022 |
| Mosswood Hall Farmers Ltd | Crewe | 2023 |
| Mossy Earth Ltd | Chichester | 2017 |
| Moster Inc Ltd | Mold | 2017 |
| Mote END Farm Limited | London | 2003 |
| Mother Clucking Farm Ltd | Bideford | 2025 |
| Mother Farm Limited | Ledbury | 2007 |
| Mothers Branch Limited | London | 2022 |
| Motion Horse Limited | Bury St Edmunds | 2018 |
| Mottra Ltd | London | 2008 |
| Mottram Farms Limited | Lincoln | 2013 |
| Mouat Marine & Agri Services Ltd | Shetland | 2016 |
| Mouche Ltd | Norwich | 2019 |
| Mouda Sport Horses Limited | Chester | 2020 |
| Mouldshaugh Farm Limited | Alnwick | 1964 |
| Moulsham Hall Farms Limited | Chelmsford | 2001 |
| Moulton Allotments C.I.C. | Northampton | 2016 |
| Moulton Farms Limited | Hayle | 2015 |
| Moulton Manor Farm | Suffolk | 1963 |
| Moulton Manor Farm (Holdings) Limited | Newmarket | 1994 |
| Mount Bank Farm Limited | Bury St. Edmunds | 2015 |
| Mount Bugle Investments Limited | Chandlers Ford | 2004 |
| Mount Farm Bloodstock Partnership Ltd | Llanymynech | 2025 |
| Mount Farm Vineyards Ltd | Sudbury | 2018 |
| Mount Gould Gundogs & Training Ltd | London | 2025 |
| Mount Group Services Ltd | Bury | 2023 |
| Mount Melville Limited | Edinburgh | 1994 |
| Mount Mill Farm Limited | Milton Keynes | 2025 |
| Mount Pleasant Contracting Limited | Beverley | 2010 |
| Mount Pleasant Ducks Limited | Bury St. Edmunds | 2004 |
| Mount Prospect Poultry Limited | Craigavon | 2016 |
| Mount Regen Ltd | Coventry | 2021 |
| Mount Stamper Farm Ltd | St. Austell | 2024 |
| Mount View Enterprises Ltd | Hook | 2025 |
| Mount View Farm Limited | Huddersfield | 2005 |
| Mount Vineyard Limited | Shoreham | 2011 |
| Mount's Bay Fish Limited | Loughborough | 2021 |
| Mountain Farm Ltd | Llanwrda | 2023 |
| Mountain Hall Farm Limited | Glogue | 2019 |
| Mountain MEN Agri Limited | Enniskillen | 2017 |
| Mountain Scotland Limited | Fraserburgh | 2016 |
| Mountain View Equestrian Ltd | Brecon | 2023 |
| Mountain View Farm Limited | Augher | 2010 |
| Mountain View Regenerative Farm Ltd | Hereford | 2023 |
| Mountfair Farming Limited | Berwickshire | 2003 |
| Mountfield Equestrian Limited | Haslemere | 2017 |
| Mounticombe Farm Ltd | South Molton | 2010 |
| Mountjoy Farms Limited | Haverfordwest | 2017 |
| Mountjoy Wood Ltd | Milnthorpe | 2014 |
| Mountmatic Ltd | London | 2025 |
| Mountquhanie (Louise) Limited | Dundee | 2010 |
| Mountquhanie Limited | Dundee | 2010 |
| Mountshore Limited | Edinburgh | 1997 |
| Mountskip Farm & Livery Ltd | Gorebridge | 2013 |
| Mountwest 4 Limited | Aberdeenshire | 1993 |
| Mourne Alpacas Ltd | Dromara | 2019 |
| Mourne Livestock Ltd | Newry | 2022 |
| Mouse Park Limited | Doncaster | 2014 |
| Mousefield Family Farms Limited | Newbury | 1973 |
| Mousehall Estate Ltd | Wadhurst | 2018 |
| Mouton Limited | Broadway | 1985 |
| Mova Investments Ltd | Salisbury | 2022 |
| Move Right Therapy Ltd | Ballyclare | 2017 |
| Movri Cloud Limited | London | 2026 |
| Mowgli's Mutts Ltd | Leeds | 2022 |
| Mowi Scotland Limited | Rosyth | 1992 |
| Mowles Farms Ltd | Tetbury | 2010 |
| Mowtech Ltd | Basingstoke | 2017 |
| Moxon (Farms) Limited | Pontefract | 1976 |
| MOY Equestrian Centre Limited | Omagh | 2011 |
| Moyadd Farm Limited | Newry | 2017 |
| Moyes Farms Limited | Aberdeen | 2009 |
| Moyness Agri Services Ltd | Blairgowrie | 2018 |