| Ashworth R.V. Limited | Rochdale | 2007 |
| Ashworth Springs Limited | Rochdale | 2003 |
| Ashworth Upholsterers Limited | Waterfoot Rossendale | 2002 |
| ASI Doors Limited | Barnsley | 2011 |
| ASI Group Limited | Wotton-Under-Edge | 2017 |
| Asia Air Services Limited | Harrow | 2019 |
| Asia Business (UK) Limited | New Malden | 2002 |
| Asia Component Supplies Limited | Wigan | 2003 |
| Asia Designer Boutique Ltd | Birmingham | 2026 |
| Asia Eats Limited | London | 2023 |
| Asia Europe Group Ltd | Chester | 2019 |
| Asia Food Products Co. Limited | Canvey Island | 1971 |
| Asia Investments UK Private Limited | London | 2023 |
| Asia Manufacturing Limited | Sutton Coldfield | 2015 |
| Asia Media Information UK Limited | London | 2021 |
| Asia Superyachts Ltd | London | 2025 |
| Asia-Tek Ltd | Rushden | 2009 |
| Asiahan Metal Co. Ltd. | London | 2015 |
| Asian AL Shark Ltd | London | 2025 |
| Asian Bakers (Barking Road) Ltd | London | 2014 |
| Asian Bakers FG Ltd | London | 2012 |
| Asian Classic Limited | Birmingham | 2025 |
| Asian Delhi Ltd | London | 2025 |
| Asian Products & Services Ltd | Gloucester | 2019 |
| Asian Restaurants Limited | London | 1992 |
| Asian Snacks Ltd | Maldon | 2014 |
| Asian Suits Online Ltd | Leicester | 2017 |
| Asian WOK Cookers Ltd | Great Harwood | 2024 |
| Asiana Ltd | London | 2024 |
| Asiatic Marine and Trading PTE. Ltd | Beckenham | 2024 |
| Asico Lubes Ltd | Birmingham | 2025 |
| Aside Creative UK Limited | Abingdon | 2016 |
| Asier Lighting Solution Limited | Beckenham | 2024 |
| Asif & Sons Ltd | Bristol | 2024 |
| Asika Limited | Marylebone | 2012 |
| Asikaraprints Ltd | Manchester | 2025 |
| Asil Productions Limited | London | 2023 |
| Asilah Manor Ltd | London | 2026 |
| Asim Foods Limited | Bradford | 2021 |
| Asim Sons Ltd | Dewsbury | 2026 |
| Asim Textiles Ltd | Stoke On Trent | 2023 |
| Asinstudio Ltd | Mold | 2020 |
| Asionix Global Ltd | Birmingham | 2018 |
| Asit Technology Co., Ltd. | Beckenham | 2021 |
| ASK Calendars Limited | Bury St. Edmunds | 2021 |
| ASK Clay Ltd | Thetford | 2025 |
| ASK Coatings Limited | Wimborne | 2008 |
| ASK Creative Limited | Cardiff | 2010 |
| ASK Electrical Limited | Bushey Heath | 2016 |
| ASK Electrical NE Limited | Newcastle Upon Tyne | 2018 |
| ASK Fabrications Limited | Manchester | 2009 |
| ASK Local Limited | Bury St. Edmunds | 2021 |
| ASK Online Limited | Bury St. Edmunds | 2021 |
| ASK Plastics Birmingham Ltd | Southampton | 2015 |
| ASK Plastics Ltd | Southampton | 2015 |
| ASK Technology Limited | Basingstoke | 2003 |
| ASK Trading Ltd. | Rochdale | 1988 |
| ASK3 Group Ltd | Brantham | 2023 |
| Aska Joinery Ltd | London | 2024 |
| Askar Interiors Ltd | Birmingham | 2025 |
| Askari Aeroparts Limited | Henfield | 2003 |
| Askari Reworks Limited | Birmingham | 2025 |
| Askern UK Limited | South Kirkby | 1956 |
| Askett & English Ltd | Marlow | 2011 |
| Askew Building Services Ltd | Maidstone | 2006 |
| Askew Cooling & Electrical Ltd | Kettering | 2013 |
| Askew Glass Limited | London | 2010 |
| Askey Precision Engineering Limited | Walsall | 1996 |
| Askeyuk Co. Limited | Edgware | 2020 |
| Askival RUM Ltd | Isle Of Rum | 2024 |
| Asko Commercial Appliances Limited | Gloucester | 2025 |
| Asko Foods Limited | Barking | 2013 |
| ASL Ceramics Ltd | London | 2019 |
| ASL Group London Ltd | Dartford | 2023 |
| ASL Group UK Ltd | Belfast | 2023 |
| ASL GRP Limited | Ventnor | 2012 |
| ASL GRP Projects Ltd | Shanklin | 2021 |
| ASL Holdings Limited | Cwmbran | 2002 |
| ASL Lifting Ltd | Dartford | 2023 |
| ASL Operations Ltd | London | 2022 |
| ASL Plumbing &Property Projects Limited | Sheffield | 2024 |
| ASL Stone Company Ltd | Clitheroe | 2011 |
| ASL Systems Limited | Sunderland | 1967 |
| ASL Welding Ltd | Scunthorpe | 2010 |
| Asla Automation Ltd | Sutton Coldfield | 2019 |
| Aslam & Sons Limited | Birmingham | 2024 |
| Aslan Fine Plaster Craft Ltd | Brackley | 2024 |
| Aslan Medical Ltd | Liverpool | 2022 |
| Asleepholdings Limited | Woodford Green | 2024 |
| Asleeptrading Limited | Woodford Green | 2024 |
| Asli Desi Limited | Hounslow | 2025 |
| Asli Sweets & Food Factory Ltd | Leicester | 2025 |
| Asli Zaika Limited | London | 2025 |
| Aslw Limited | London | 2025 |
| ASM (Accessories) Limited | Manchester | 1962 |
| ASM (Leicester) Ltd | Leicester | 2026 |
| ASM (Swindon) Ltd | Leicester | 2024 |
| ASM Access Ltd | Droitwich | 2009 |
| ASM Alternative Feeds Limited | Co Down | 2007 |
| ASM Extensions and Plastering Limited | Birmingham | 2025 |