| Agriworks Scotland Ltd | Alva | 2025 |
| Agriworx Cotswolds Ltd | Cheltenham | 2023 |
| Agriworx Limited | Weymouth | 2016 |
| Agro Afriq Investments Ltd | Brentford | 2025 |
| Agro Greenshaw Limited | Swindon | 2025 |
| Agro Volt UK Ltd | London | 2024 |
| Agro-Tech Group Holding Ltd | Cambridge | 2023 |
| Agrobase Trading Limited | Rainham | 2011 |
| Agrobiologic UK Ltd | Ross-On-Wye | 2024 |
| Agrocare UK Limited | Blackpool | 2022 |
| Agrocentric UK Ltd | London | 2025 |
| Agrodigital & Biological Solutions Limited | Swindon | 2018 |
| Agroecology LAB Ltd | Bristol | 2024 |
| Agroecosystems Ltd | Kingussie | 2012 |
| Agrofarming Limited | London | 2022 |
| Agrohq Ltd | London | 2022 |
| Agroinvest Limited | London | 2005 |
| Agrology Ltd | Peterborough | 2020 |
| Agromel UK Limited | Chelmsford | 2024 |
| Agrominergy Europe Investment Limited | London | 2007 |
| Agromykos Limited | Sheffield | 2023 |
| Agronomic Services Limited | Leyburn | 2007 |
| Agronomy Buying Services Limited | Basingstoke | 2000 |
| Agronomy Connection Limited | Nottingham | 1996 |
| Agronomy Research Group Limited | Bingley | 2017 |
| Agronomy Supplies Limited | Driffield | 2011 |
| Agronomy Training Ltd | Loughborough | 2023 |
| Agropro Trading Ltd | London | 2014 |
| Agroseeds Ltd | London | 2022 |
| Agrosoft Ltd. | Ipswich | 1997 |
| Agrostis Investment Management Solutions Ltd | Pershore | 2012 |
| Agrotech Farming Ltd | London | 2024 |
| Agrotonomy Limited | Manchester | 2025 |
| Agrovance Ltd | Ellon | 2025 |
| Agrovest Ltd | Sittingbourne | 2011 |
| Agrovista UK Limited | Nottingham | 1998 |
| Agrumi Limited | Lymington | 2006 |
| Agrumi Tiptoe Limited | Lymington | 2001 |
| Agruptive Ltd | Randalstown | 2019 |
| AGS Equestrian Ltd | Swanley | 2024 |
| AGS Grain Ltd | London | 2020 |
| AGS North West Limited | Preston | 2015 |
| AGS Seafood Limited | Pinner | 2024 |
| AGS System Ltd | Teddington | 2020 |
| Agsense Limited | Nottingham | 2016 |
| Agserve Ltd | Beccles | 2022 |
| AGT (NKT) Limited | Newmarket | 2024 |
| AGT Farms Limited | Chippenham | 2017 |
| Agterracoop Ltd | Leicester | 2019 |
| Agua Limpa Limited | London | 2018 |
| Agvanced Grain Systems Limited | Dorchester | 2021 |
| Agventure Farms Ltd | Leicester | 2020 |
| Agway NI Ltd | Armagh | 2025 |
| AH & EH Agri Ltd | Salfords | 2016 |
| AH Farming Ltd | Cambridge | 2013 |
| AH Farms Ltd | Market Rasen | 2018 |
| AHB Forestry Limited | Hexham | 2021 |
| Ahec Ltd | Newcastle | 2024 |
| AHG Landscapes Ltd | Chester | 2018 |
| Ahhfp Limited | Stockton-On-Tees | 2023 |
| Ahimsa Dairy Foundation | Aldenham | 2010 |
| Ahimsa Farms Limited | Watford | 2025 |
| Ahjc Agri Ltd | Leytonstone | 2025 |
| Ahmed Agency Limited | Romford | 2022 |
| Ahmed&Sherif Ltd | Cardiff | 2025 |
| Ahop Limited | London | 2018 |
| AHR Equine Clipping Limited | Liverpool | 2024 |
| AHT Teak Ltd | Ashby-De-La-Zouch | 2019 |
| AI Semen Supply Centre Limited | Ballymena | 2023 |
| AI Services (Northern Ireland) Limited | Newtownabbey | 1988 |
| AI Tree Services Limited | Stowmarket | 2017 |
| Aico Aquatic Products Co., Ltd. | Beckenham | 2019 |
| Aidig Ltd | London | 2020 |
| Aidley Agri Ltd | Nantwich | 2025 |
| Aiken Agricultural Contracts Ltd | Kesh | 2015 |
| Aikerness Marine Services Ltd | Kirkwall | 2015 |
| Aiket Land Limited | Kilmarnock | 2016 |
| Aikton House Farm | Wigton | 2011 |
| Ailsaview Cockapoo's Ltd | Glasgow | 2026 |
| Aime Kuisine CIC | London | 2025 |
| Aimee's Happy Tail's Ltd | Reading | 2023 |
| Aimi Global Media Ltd | London | 2025 |
| Aimis Tree Care Limited | Woking | 2017 |
| Ainsdale Shellfish Limited | Anstruther | 2016 |
| Ainsley Saddlery Ltd | Hungerford | 2019 |
| Ainsty Timber Marketing Limited | York | 1979 |
| Aintree Holsteins Limited | Wrexham | 2002 |
| Aion Farm Ltd | Farnham | 2025 |
| Air an LOT Ltd | Isle Of Lewis | 2019 |
| Air Water Fish Ltd | Kings Lynn | 2020 |
| Airburner UK Limited | Braintree | 2007 |
| Airds, Kirkton and Balindeor Common Grazings Ltd | Taynuilt | 2018 |
| Aire Valley Logs, Tree Surgery & Landscapers Limited | Keighley | 2023 |
| Aire Valley Tree Services Limited | Leeds | 2008 |
| Airedale Forestry Limited | Houghton Le Spring | 2002 |
| Airedale Ltd | Bridgnorth | 2023 |
| Airedale Tree Surgeons Limited | Skipton | 2002 |
| Airfield Croft Ltd | Tain | 2024 |
| Airfield Enterprises | Co Antrim | 1999 |
| Airfield Farm Limited | Woodbridge | 2019 |