| Allan Cameron and Partners Ltd | Inverness | 2015 |
| Allan Collyer & Sons Limited | Bungay | 2003 |
| Allan Davies & SON JCB Hire Ltd | Abercynon | 2019 |
| Allan G Riley Ltd | Wigton | 2012 |
| Allan Lockyer and SON Limited | Salisbury | 1960 |
| Allan Mckenzie Limited | Annan | 2019 |
| Allan Moffat Forestry Limited | Dunfermline | 2011 |
| Allan Moore (Drummond) Limited | Dingwall | 1960 |
| Allan R Struthers Limited | Kilmarnock | 2019 |
| Allan Smith Fencing & Forestry Limited | Dumfries | 2005 |
| Allan Thompson (Farms) Limited | Keighley | 1963 |
| Allangrange Farming Company | Munlochy | 1978 |
| Allangrange Mains Farm Limited | Ilminster | 2007 |
| Allanson Limited | North Yorkshire | 2004 |
| Allard Agronomy and Crop Consultancy Services Limited | Hereford | 2023 |
| Allard Land Consultancy Limited | Gillingham | 2026 |
| Allbarnone Bloodstocks Limited | Cheshire | 2007 |
| Allbokos Ltd | Manchester | 2022 |
| Allen & Wayne Limited | Ashbourne | 2026 |
| Allen (Hanford) Limited | Didcot | 2000 |
| Allen Bros Limited | Newark | 2020 |
| Allen Clark Farming Limited | Southwell | 2004 |
| Allen Family Farm Limited | Whitchurch | 2014 |
| Allen Farming Ltd | Swadlincote | 2013 |
| Allen Farms (Coddington) Limited | Newark | 2011 |
| Allen Farms Limited | Tring | 1960 |
| Allen G. Meale & Sons Limited | Stalham | 1965 |
| Allen's Farming Limited | Chippenham | 2024 |
| Allendale Country Club Ltd | Hexham | 2018 |
| Allens Farm Partners Ltd | Colchester | 2025 |
| Allens Hill Limited | Pershore | 2004 |
| Allensmore Nurseries Limited | Herefordshire | 1987 |
| Aller Wood Limited | Sidmouth | 2020 |
| Allerby Mill Ltd | Stranraer | 2026 |
| Allerdown Farms Limited | Totnes | 2012 |
| Allergy Medical Services Limited | London | 2018 |
| Allerthorpe Construction Limited | York | 1987 |
| Allerton Land Ltd | Torquay | 2012 |
| Allgame (Scotland) Limited | Laurencekirk | 2021 |
| Allgame Limited | Westlands | 2013 |
| Allgood Agricultural Contractors Ltd | St. Ives | 2022 |
| Allgood Farm Ltd | Huddersfield | 2023 |
| Allgraze Limited | Salisbury | 2024 |
| Allgreen Tech Ltd | Liverpool | 2022 |
| Allgreen Tree Services Ltd | Manchester | 2026 |
| Alliance Aquaculture Limited | Sawbridgeworth | 2019 |
| Alliance Bloodstock Ltd | Bedford | 2017 |
| Alliance Fish Ltd | Morpeth | 2020 |
| Alliance for Sustainable Development Initiatives (Asdi) CIC | London | 2024 |
| Allibaba Limited | Milton Keynes | 2019 |
| Allied Growers Limited | Louth | 2014 |
| Alliedfield Limited | Bideford | 1982 |
| Alliemhor Consultancy Ltd | Glasgow | 2021 |
| Alligator Hardscape and Plant Ltd | Harrogate | 2019 |
| Allin Dairy Limited | Bideford | 2021 |
| Allin Solutions Limited | Shetland | 2026 |
| Allington Equine Ltd | Andover | 2015 |
| Allington Farms Limited | Devizes | 2011 |
| Allison Farming | Carlisle | 2024 |
| Allisun BIO Ltd | Heathfield | 2017 |
| Allium Foods Ltd | Bury St. Edmunds | 2001 |
| Allmodcons Ltd | Swansea | 2003 |
| Alloi Herbs Limited | Leeds | 2012 |
| Allostock Hall Equestrian Ltd | Northwich | 2020 |
| Allostock Nurseries Limited | Northwich | 2004 |
| Allpress Farms Limited | Chatteris | 1965 |
| Allrounder Equestrian Limited | Epsom | 2012 |
| Allseasons PAW Park Ltd | Westerham | 2024 |
| Allt Mhor Limited | Edinburgh | 2026 |
| Allt Power Limited | Amersham | 2009 |
| Allt Y Bela Farm Limited | Usk | 2022 |
| Alltech (U.K.) Limited | Stamford | 1982 |
| Alltreeneeds Ltd | Tiverton | 2022 |
| Alltwen Farm Limited | Aberystwyth | 2025 |
| Allwood Farm Ltd | Hull | 2020 |
| Allwoods (Hassocks) Limited | Hassocks | 2011 |
| Allwynds Fishing Company Ltd | Islay | 2018 |
| Allycat Concierge Ltd | Wotton-Under-Edge | 2025 |
| Allynugger Tea Company,Limited(The) | Near Sevenoaks | 1892 |
| ALM Agriculture Limited | Pontypridd | 2025 |
| Alma Jordan Farms Limited | Anlaby | 1975 |
| Almara Commercial Limited | Horsforth | 2012 |
| Almaris Kennels Ltd | Norwich | 2019 |
| Almodington Nurseries Limited | Bognor Regis | 1983 |
| Almond Agri Services Ltd | Great Eccleston | 2024 |
| Almond ARB & Ecology Limited | Leicester | 2024 |
| Alne Estates. | Solihull | 1948 |
| Alne Park Stud Ltd | Alcester | 2015 |
| Alness Angling Club | Inverness | 2006 |
| Alnetti International Food Ltd | Manchester | 2025 |
| Alnwick Farmers Livestock Auction Company Limited | Morpeth | 1956 |
| Aloha Group Limited | Salcombe | 2017 |
| Alourya Fishing Ltd | Glasgow | 2020 |
| ALP Farms Limited | Dungannon | 2013 |
| Alpaca Evolution Limited | Milton Keynes | 2017 |
| Alpaca Lodge Limited | Letchworth Garden City | 2022 |
| Alpaca Trail Adventures Crowle Ltd | Wakefield | 2026 |
| Alpacaly Ever After C.I.C. | Penrith | 2017 |
| Alpacas at the Meadows Ltd | Louth | 2023 |
| Alpacas in the Woods Ltd | Hexham | 2022 |