| Agra Drainage Limited | Blairgowrie | 2008 |
| Agraradler Ltd | St. Neots | 2020 |
| Agreco Ltd. | Bromyard | 2011 |
| Agresource Limited | Ely | 2009 |
| Agretti Holdings Limited | Birmingham | 2023 |
| Agri and Garden Ltd | Lisburn | 2013 |
| Agri Guards Ltd | Crediton | 2021 |
| Agri International Trade Co., Ltd | Beckenham | 2021 |
| Agri Style Ltd | St Ives | 2022 |
| Agri-Mix Aggregates Limited | Colchester | 2013 |
| Agri-Pharma UK Ltd | Stirling | 2019 |
| Agricarne Limited | Malvern | 2022 |
| Agricultural Commercial Marine Limited | Yelverton | 2020 |
| Agricultural Finance Bureau Limited | Aberdeenshire | 1994 |
| Agricultural Machinery Sales Limited | Boston | 2010 |
| Agricultural Planning Engineering Construction Services Limited | Southampton | 2020 |
| Agriculture Vehicle Sales Limited | Craigavon | 1957 |
| Agricwind Limited | Craigavon | 2012 |
| Agrifarm Crop Protection Co., Limited | Stafford, | 2017 |
| Agriframes Limited | Avon | 2006 |
| Agrigriff Ltd | Stoke-On-Trent | 2024 |
| Agrimark Trailers Limited | Sheffield | 2002 |
| Agrimech Services Ltd | Wisbech | 2014 |
| Agrinite Limited | Middle Rasen | 2019 |
| Agriorganics Ltd | Wigton | 2006 |
| Agriprojects Consulting Limited | | 2003 |
| Agris Bygg Invest Limited | London | 2025 |
| Agris Bygg Limited | London | 2025 |
| Agrisource Limited | Richmond | 2020 |
| Agrisun International Limited | Cardiff | 2006 |
| Agrivice Limited | Lincoln | 2000 |
| Agrivoltaics Ltd | Southampton | 2020 |
| Agro Peak Chem Ltd | London | 2023 |
| Agroenergy Limited | Edinburgh | 1980 |
| Agrofendt Ltd | London | 2012 |
| Agroplast (Production) Limited | London | 2005 |
| Agrowtech Limited | London | 2016 |
| AGS 360 Careers Limited | Brighton | 2012 |
| AGS Cleaning Services Limited | Brighton | 2006 |
| AGS Investment Management Ltd | Edinburgh | 2012 |
| AGS One Group Limited | Brighton | 2010 |
| AGS Recruitment Limited | Brighton | 2008 |
| AGS Renovations Limited | Brighton | 2006 |
| AGS Safety Critical Limited | Brighton | 2006 |
| AGS Solutions (London) Limited | West Wickham | 2018 |
| AGS Yachting Ltd | London | 2024 |
| Agsess Limited | Luton | 2017 |
| Agtrack Limited | Wells | 2011 |
| AGU Limited | Abbey Wood | 2012 |
| Agua Serena Ltd | London | 2015 |
| Aguaconsult Trustees Limited | Colchester | 2023 |
| Aguahold Limited | Bethesda | 2006 |
| Agudo Developments Limited | Birmingham | 2015 |
| Aguila Investments Ltd. | London | 2017 |
| Aguk Trustee Limited | Chelmsford | 2025 |
| Agulhas Applied Knowledge Trustee Limited | London | 2020 |
| Agunic IV Limited | Blackpool | 2026 |
| Agustinos UK Limited | Manchester | 2015 |
| AGW Investments Ltd | Chorley | 2014 |
| Agwa Trading Limited | Beckenham | 2023 |
| AGZ Trading Limited | Beckenham | 2024 |
| AH Global Consultancy Services Ltd | Barking | 2021 |
| AH Quarters Ltd | Birmingham | 2024 |
| AH UK Tech Limited | Exeter | 2017 |
| Ah-Hah Ltd | Doncaster | 2009 |
| AHA Bygg Limited | London | 2022 |
| Aharon Shlomo Wasserstrum Ltd | London | 2024 |
| Ahawkinstherapy Limited | Chichester | 2021 |
| AHC Cleaners Ltd | Southampton | 2025 |
| AHC Limited | London | 2023 |
| AHC Powertools Limited | Alloa | 2012 |
| Ahdm Ltd | Coventry | 2018 |
| Aheadjust Limited | Beckenham | 2020 |
| Ahgr Limited | Egham | 2001 |
| Ahha Publications Limited | Redditch | 2010 |
| AHI Bidco Limited | Norwich | 1990 |
| AHL Maintenance Ltd | Rotherham | 2025 |
| Ahlia Corp Ltd | Bedford | 2017 |
| Ahluwalia Films Limited | Sidcup | 2023 |
| Ahluwalia Limited | Sidcup | 2021 |
| Ahluwalia World Limited | Sidcup | 2023 |
| Ahmad and Saleem Ltd | Oldham | 2014 |
| Ahmarra Limited | Havant | 2008 |
| Ahmed & Sons Holdings Limited | London | 2022 |
| Ahmed Investments & Ventures Limited | Beeston | 2023 |
| Ahmed Musa Taxi Invest Limited | London | 2021 |
| Ahmed Musa Taxi Limited | London | 2021 |
| Ahmespi International Ltd | Beckenham | 2020 |
| Ahmm Employee Ownership Trustee Limited | London | 2017 |
| Ahon Ltd | Bristol | 2023 |
| Ahoo & AVA Ltd | Barnet | 2022 |
| Ahpra Limited | London | 2019 |
| Ahrs Management Ltd | Coventry | 2016 |
| Ahrs Marine Ltd | London | 2024 |
| AHS Catering Ltd | Swindon | 2017 |
| Ahsan Reza & Co Limited | London | 2011 |
| Ahsf Ltd | Isleworth | 2021 |
| AHU Management Limited | Holmfirth | 2008 |
| Ahuachapan Investment Corporation (Ahuainvest) Ltd. | London | 2017 |
| AI Accountancy Limited | London | 2025 |