| Autopipe Equipment Limited | Wallsend | 2016 |
| Autoplan Solutions Limited | Stoke-On-Trent | 2025 |
| Autoplaytec Limited | Swadlincote | 2018 |
| Autopoietic Telemetric Solutions Limited | South Shields | 2010 |
| Autopot (Global) Limited | Farnborough | 2005 |
| Autopour Limited | Camberley | 2023 |
| Autopreda Ltd | Wolverhampton | 2025 |
| Autoprime Automotive Products Ltd | Bexhill-On-Sea | 2020 |
| Autopro Nexus Ltd | London | 2023 |
| Autoprotekt Limited | Kilwinning | 2017 |
| Autorack Products Ltd | Colyton | 2011 |
| Autoreel Limited | Nottingham | 1985 |
| Autoreg Limited | Grimsby | 2002 |
| Autoroll UK Limited | Manchester | 2005 |
| Autory Ltd | Newbury | 2025 |
| Autos Great Britain Limited | Derbyshire | 1987 |
| Autos International Holding Co., Ltd. | Beckenham | 2015 |
| Autosafe 2000 Limited | Cheshire | 2002 |
| Autosan Limited | Solihull | 1993 |
| Autoscan Limited | Edinburgh | 1957 |
| Autoscript Limited | Bury St. Edmunds | 1984 |
| Autoservices GP Ltd | Margate | 2015 |
| Autoset (Production) Limited | Stroud | 1998 |
| Autosheen Ltd | Bolton | 2019 |
| Autoshine Alloy Wheel Refurbishment Limited | East Grinstead | 2020 |
| Autosigma Ltd | London | 2021 |
| Autosmart Holdings Group Limited | Lichfield | 2025 |
| Autosmart Holdings Limited | Lichfield | 2005 |
| Autosmart International Ltd | Lichfield | 1978 |
| AUTOSOLUTIONS90 Ltd | Birmingham | 2025 |
| Autosounds Limited | Cardiff | 2004 |
| Autospan Limited | London | 2000 |
| Autospeedwatch Limited | Brighton | 2018 |
| Autospin(Oil Seals)Limited | Birmingham | 1975 |
| Autosport Group Limited | Coventry | 2003 |
| Autosteer Direct Limited | Chester | 2003 |
| Autostitch Traders Ltd | Ellesmere | 2024 |
| Autostructures UK Limited | Birmingham | 1958 |
| Autoswitch Electronics Limited | Litlington | 1995 |
| Autotaps (UK) Limited | Croydon | 2013 |
| Autotaps Limited | Croydon | 2008 |
| Autotec (Bolton) Ltd | Bolton | 2025 |
| Autotech MB UK Ltd | Denton | 2023 |
| Autotech Robotics Limited | Manchester | 1989 |
| AUTOTECHNIQUE8X8 Limited | London | 2016 |
| Autotel Limited | Norwich | 2003 |
| Autotrack Installations Ltd | Warwick | 2019 |
| Autotrailer Ltd | Widnes | 2024 |
| Autotune (NI) Limited | Ballymena | 2014 |
| Autoturn IT Limited | Ruislip | 2021 |
| Autovali Torbay Ltd | Totnes | 2025 |
| Autovan Services Limited | Southampton | 1992 |
| Autovogue Composites Limited | Newcastle | 2018 |
| Autowash (Domestic & Commercial Appliances) Limited | Kent | 1996 |
| Autowash Engineering Limited | Hinckley | 1973 |
| Autoweigh Ltd | Hereford | 2026 |
| Autowerx Service Ltd | Milton Keynes | 2013 |
| Autoworx Engineering Limited | Axminster | 2016 |
| Autowraps & PPF Limited | Milton Keynes | 2019 |
| Autowrx Limited | Motherwell | 2022 |
| Autraj Innovations Ltd | London | 2010 |
| Autrix Limited | Lincoln | 2023 |
| Autumn Composites Ltd | Scunthorpe | 2026 |
| Autumn Dreams Ltd | Wilmslow | 2025 |
| Autumn Engineering (Nottingham) Limited | Thame | 2005 |
| Autumn Frameworks Limited | Berkhamsted | 2013 |
| Autumn Gold Ltd | Epsom | 2023 |
| Autumn Hills Design Ltd | Wolverhampton | 2024 |
| Autumn House Publications (Europe) Limited | Lincs | 1991 |
| Autumn Precision Engineering Limited | Hounslow | 1996 |
| Autumns Corner Ltd | Cardiff | 2021 |
| Auty Precision Products Limited | Epsom | 1984 |
| Autymation Ltd | Marlborough | 2023 |
| Auventtech Ltd | Cardiff | 2023 |
| Auveria Labs Ltd | London | 2026 |
| Auviv Limited | Hexham | 2000 |
| Auvra Home Products Limited | Ipswich | 2026 |
| Auwell Electronics Limited | Cheltenham | 1977 |
| Auwelltier Steel Limited | London | 2025 |
| AUX Merveilleux City Ltd | London | 2019 |
| AUX Merveilleux Clapham Limited | London | 2013 |
| AUX Merveilleux DE Fred Ltd | London | 2012 |
| Auxano Technologies Limited | Stockport | 2009 |
| Auxiliary Tank Services Ltd | Sandbach | 2007 |
| Auxilife Nutrition Limited | Coventry | 2022 |
| Auxtail Limited | Milton Keynes | 2016 |
| Auza Ltd | London | 2021 |
| Auzar Surgical Ltd | Worthing | 2023 |
| Auzi Hearing Limited | London | 2023 |
| AV 100 Ltd | Leicestershire | 2021 |
| AV Actuators Limited | Worcester | 2014 |
| AV Asia Enterprises Ltd | Manchester | 2007 |
| AV Boats Ltd | Abingdon | 2014 |
| AV Business Group Ltd | London | 2025 |
| AV Coatings Limited | Ammanford | 2009 |
| AV Control Systems Limited | Runcorn | 2006 |
| AV Corporation Ltd | Leicester | 2023 |
| AV Designs Kitchen and Bedrooms Ltd | Feltham | 2025 |
| AV Division Limited | Leicester | 2022 |
| AV Elite Installations Ltd | Fleet | 2012 |