| Arden Forestry and Son's Ltd | Birmingham | 2024 |
| Arden Green Estate Management Ltd | Lewes | 2026 |
| Arden LEA Nurseries Limited | Hesketh Bank | 1949 |
| Arden Tree Surgery Limited | Solihull | 2001 |
| Ardencol Properties Ltd | Helensburgh | 2019 |
| Ardent 266 Limited | Fraserburgh | 2016 |
| Ardessie Salmon Limited | Fife | 1986 |
| Ardet Ltd | Milnethorpe | 2019 |
| Ardglennie Farming Company Limited | Forfar | 2013 |
| Ardgowan Trees Limited | Skelmorlie | 2023 |
| Ardinariff Farms Ltd | Dungiven | 2016 |
| Ardizzone Tree Care Limited | Norwich | 2026 |
| Ardler Eggs Limited | Blairgowrie | 2026 |
| Ardmachdonie Partnership Ltd | Inverness | 2015 |
| Ardmore Dairy Ltd | Castlederg | 2025 |
| Ardnamurchan Estates Limited | Acharacle | 1996 |
| Ardnaw Farms Limited | Lochgilphead | 1990 |
| Ardoch Farming Company Limited | London | 1959 |
| Ardore Farms Limited | Enniskillen | 2022 |
| Ardovie Farms Ltd | Brechin | 2019 |
| Ardreagh Farms Ltd | Coleraine | 2026 |
| Ardros Kennels Limited | Berwick Upon Tweed | 2020 |
| Ardross Castle Enterprises Limited | Ardross | 1983 |
| Ardtalla Estates Limited | Isle Of Islay | 1973 |
| Ardtoe Aquatech Limited | Edinburgh | 2022 |
| Ardtole Ltd | Belfast | 2021 |
| Ardtornish Estate Company Limited | Oban | 1967 |
| Ardwall Farms Limited | Edinburgh | 1987 |
| Ardyne Estates Limited | Edinburgh | 2012 |
| Ardyne Farm Limited | Glasgow | 1962 |
| Ardyne Organic Farms Ltd | Edinburgh | 2015 |
| ARE Engineering Limited | East Lothian | 2007 |
| Aredis Limited | Harrogate | 2001 |
| Arenaeq Limited | Uxbridge | 2021 |
| ARF Group Ltd | Edinburgh | 2023 |
| ARG Agricultural Services Ltd | Newcastle | 2022 |
| Argae House Equestrian Limited | Dinas Powys | 2000 |
| Argania Limited | West Midlands, England | 2025 |
| Argento Livery Services Limited | Radway | 2025 |
| Argents Limited | Writtle | 1947 |
| Argo Bullies Ltd | Witham | 2024 |
| Argo Tree Specialists Limited | Doncaster | 2020 |
| Argoed Hall Farm Limited | Mold | 2013 |
| Argos-Inv Ltd | London | 2019 |
| Argosy Fishing Limited | Kirkcudbright | 2011 |
| Argrain Holdings Limited | York | 2011 |
| Argrain Limited | York | 1975 |
| Argyle Farmers Limited | Chester | 2015 |
| Argyll Escapes Ltd | Dunoon | 2020 |
| Argyll Forestry Fencing Limited | Lochgilphead | 2019 |
| Argyll Forestry Limited | Inveraray | 2013 |
| Argyll Forestry Services Limited | Dunoon | 2016 |
| Argyll Langoustines Limited | Glasgow | 2017 |
| Aria Botanica Limited | Nottingham | 2025 |
| Arian Mixed Farming Ltd | Northwich | 2024 |
| Aricelestial Breeding Limited | Cheadle | 2026 |
| Arie Solutions Ltd | Walsall | 2023 |
| Ario Dog Ltd | Colchester | 2025 |
| Arion Bloodstock Ltd | London | 2026 |
| Arion Ranch Ltd | Alresford | 2024 |
| Arion Show Jumpers Limited | Hertfordshire | 2007 |
| Arion World Harvest Limited | Bradford | 2025 |
| Aristacaz Limited | Leyland | 2022 |
| Ariun Ltd | Westcliff-On-Sea | 2023 |
| ARK Arborists Ltd | Skegness | 2019 |
| ARK Lead Finance Limited | Belvedere | 2024 |
| ARK Seafood Limited | London | 2017 |
| ARK Wines Ltd | Sudbury | 2024 |
| ARK Worldwide Ltd | London | 2021 |
| Arke Fishing Ltd | Campbeltown | 2019 |
| Arkle Moor Riding Centre Ltd | Richmond | 2022 |
| Arkstone Court Limited | Hereford | 2013 |
| Arkvale Limited | Glasgow | 2002 |
| ARL Fishing Company Limited | Peterhead | 2003 |
| Arlatdax Ltd | Bridge Of Weir | 2023 |
| Arlco Forestry and Tree Contractors Ltd | Darwen | 2026 |
| Arlescote Woods Limited | Warwick | 2016 |
| Arlington Farming Limited | Newark | 1998 |
| Arlington Fish Limited | Leicester | 2022 |
| ARM Poultry Limited | Lincoln | 2016 |
| Arma GM Limited | Sutton | 2018 |
| Armadale Estate Ltd | Isle Of Skye | 2025 |
| Armadale Scottish Wild Salmon and Shellfish Ltd | By Thurso | 2016 |
| Armagh County Agricultural Show Society | Armagh | 2003 |
| Armagh Tree Surgery Ltd | Armagh | 2025 |
| Armana Limited | Ferriby Road Hessle | 1987 |
| Armap Ltd | Banbridge | 2013 |
| Armaraur Herd Management Service Ltd | Whalley | 2018 |
| Armaven (UK) Limited | Buckfastleigh | 2006 |
| Arminca Limited | Teddington | 2008 |
| Armistead's Eggs Limited | Barrow-In-Furness | 2021 |
| Armitage (UK) Limited | Wakefield | 2002 |
| Armitage Farms Ltd | Leicester | 2019 |
| Armoured Hedgehog Ltd | Chichester | 2023 |
| Armoy Livestock Mart Limited | Cushendall | 2012 |
| Arms Apiaries Ltd | Aylesford | 2025 |
| Armstrong & SON Agri and Straw Management Limited | Peterborough | 2023 |
| Armstrong Agriculture Limited | Stamford | 2003 |
| Armstrong Farm T/A Hillview Farm Ltd | Lisburn | 2026 |
| Armstrong Livestock Ltd | Inverurie | 2021 |