| Airfield Farms Sulby Limited | Nr Lutterworth | 2019 |
| Airlie Estates Holdings Limited | Kirriemuir | 1972 |
| Airponix Ltd | Cambridge | 2014 |
| Airponix Seed UK Ltd | Richmond | 2026 |
| Airthrey Green Limited | Bridge Of Allan | 2014 |
| Aisha Boerboels Ltd | Stoke-On-Trent | 2022 |
| Aisha Creative Co Ltd | London | 2026 |
| Aislabie Bloodstock Limited | Newmarket | 2007 |
| Aism Ltd | Hamilton | 2023 |
| Aitch Conservation Ltd | Oldham | 2016 |
| Aithrie Limited | Edinburgh | 2012 |
| Aitken Shellfish Limited | Isle Of Islay | 2009 |
| Aitken's Sportsturf Limited | Leeds | 1996 |
| Aiva Limited | Wantage | 2015 |
| AJ & DJ Cook Limited | Umberleigh | 2010 |
| AJ & GM Cliff Ltd | Chester | 2012 |
| AJ & HR Price Ltd | Hereford | 2024 |
| AJ & JA Wilson Ltd | Ballyclare | 2011 |
| AJ & WL Turner Limited | Yeovil | 2012 |
| AJ Arborists Limited | Fairford | 2012 |
| AJ Caterers UK Limited | Shaftesbury | 1996 |
| AJ Farming Limited | South Molton | 2024 |
| AJ Farms Limited | Newtownards | 2017 |
| AJ Forestry Ltd | Dalry | 2018 |
| AJ Humphrey Forestry and Land Management Ltd | Nottingham | 2024 |
| AJ James & Sons Limited | Llandysul | 2008 |
| AJ Loche Limited | Buckie | 2018 |
| AJ Luke Contracting Ltd | Wells | 2014 |
| AJ Petrie Ltd. | Huntly | 2008 |
| AJ Services Ltd | Rugby | 2024 |
| AJ Shellfish Ltd | Broughty Ferry | 2021 |
| AJ Stirling Limited | Montrose | 2024 |
| AJ Trading Corporation Limited | Edgware | 2023 |
| AJ Trees Ltd | Exeter | 2016 |
| Ajax Palmer Equine Ltd | Harrow | 2023 |
| AJB Farming Ltd | Chippenham | 1997 |
| AJB Green Limited | Penryn | 2017 |
| Ajbs Fishing Ltd. | Peterhead | 2010 |
| AJC Enterprises (Portavogie) Ltd | Newtownards | 2026 |
| AJC Stone Limited | Buxton | 2008 |
| AJCOLLECTION1-8 Ltd | London | 2024 |
| AJD Farms Limited | Driffield | 1996 |
| AJD PIG Farms Ltd | Sixmilecross | 2018 |
| AJE Systems (UK) Limited | Wisbech | 2007 |
| Ajee Farms Ltd | Croydon | 2026 |
| AJF Farriers Ltd | Wetherby | 2014 |
| AJG Equestrian Ltd | London | 2025 |
| AJH Layers Ltd | Spalding | 2022 |
| AJL Marine & Agri Ltd | Quendale | 2024 |
| AJL Produce Limited | Belfast | 2019 |
| AJM Agri Ltd | Dingwall | 2015 |
| AJM Electrical Limited | Omagh | 2011 |
| AJM Treecare Limited | Tiverton | 2013 |
| AJM1 Services Ltd | Glasgow | 2024 |
| AJP Growers Ltd | Bristol | 2010 |
| AJR Exim Limited | Romford | 2023 |
| AJR Fishing Ltd | Fortrose | 2019 |
| AJR Northwest Limited | Carnforth | 2007 |
| AJR Taylor Farms Limited | Lincoln | 2003 |
| Ajwa International UK Ltd | Manchester | 2025 |
| AK & AD Parker Limited | Sturminster Newton | 2005 |
| AK & DM Morrison Ltd. | Isle Of Lewis | 1998 |
| Ak-Quatics Ltd | Rotherham | 2021 |
| AKA K9 Ltd | Dunstable | 2018 |
| Akela Thoroughbreds Limited | Glasgow | 2021 |
| AKG Agriculture Ltd | Barnet | 2022 |
| AKI Farming & Forestry Limited | Preston | 2022 |
| AKI Smith Ltd. | Inverness | 2005 |
| Akila Bully Camp K9 Ltd | Thornton Heath | 2019 |
| Akins Ayinla Agricbusiness Limited | Ruislip, | 2025 |
| Akira's Tales Ltd | Witney | 2025 |
| Akomrad Group Ltd | London | 2022 |
| Akre Limited | Fife | 2020 |
| Akre Systems Limited | Fife | 2017 |
| AKS Smallholdings Limited | Crewe | 2021 |
| Aksum Polo Stud Limited | Hampshire | 2017 |
| Akwa Holdings Limited | Reading | 2019 |
| AL Bremo Import and Export Limited | London | 2025 |
| AL Ezdihar for Refrigerated Transport Ltd | Manchester | 2026 |
| AL Fareed Store Ltd | Galashiels | 2025 |
| AL Jouf Palm Agricultural Ltd | London | 2025 |
| AL Murooj AL Khadraa for Agriculture & Irrigation Ltd | Manchester | 2026 |
| AL Shahania UK Limited | Salisbury | 2009 |
| AL Shira'Aa Farms Limited | Harrow | 2014 |
| AL Siddique Best Trade Zone Ltd | Wednesbury | 2026 |
| AL Thomas Limited | Llandeilo | 2017 |
| AL Wathba Falcons Ltd | London | 2019 |
| AL Wathba Ltd | London | 2019 |
| Al-Khair & Al-Amal Agricultural Investment Ltd | Leicester | 2025 |
| Alabaster (Eco) Ltd | Derby | 2026 |
| Alafia Farmstead Ltd | London | 2024 |
| Alan Baybutt & Sons Limited | Preston | 2003 |
| Alan Bethell Limited | Knutsford | 2009 |
| Alan Brind Tree Services Ltd | Fareham | 2010 |
| Alan C Cowan Ltd | Gateshead | 2022 |
| Alan Coates & SON Ltd | Clitheroe | 2013 |
| Alan Crooks Ltd | Sheffield | 2002 |
| Alan Dalton (Outwood) Limited | Goole | 1966 |
| Alan Ford Contracting Limited | Bury St Edmunds | 2012 |
| Alan Garrett Limited | Sturminster Newton | 2006 |