| Astbury Hall Operations Limited | Bridgnorth | 2018 |
| Astbury Mere Trust | Congleton | 1988 |
| Asteria Fitness Ltd. | London | 2016 |
| Asteria Leisure Limited | Bristol | 2000 |
| Asteria Studios Ltd | Manchester | 2022 |
| Asteria Vision Media Ltd | Kington | 2025 |
| Asteria's Playground Ltd | Bristol | 2024 |
| Asti Art Limited | Manchester | 2021 |
| Astic Limited | London | 2002 |
| Astley Bridge Football Club C.I.C. | Wigan | 2024 |
| Astley Youth Band | Manchester | 2016 |
| Aston Band Ltd | London | 2011 |
| Aston Down Farms Limited | Chalford,Nr.Stroud | 1981 |
| Aston Edwardian Association Limited | Birmingham | 2010 |
| Aston Events and Entertainment Limited | Devizes | 2023 |
| Aston Fields Social Club Limited | Bromsgrove | 2019 |
| Aston Manor Road Transport Museum Limited | Birmingham | 1987 |
| Aston Mark Co Ltd | London | 2017 |
| Aston Mullins Bloodstock Limited | Watford | 2011 |
| Aston Performing Arts Academy C.I.C. | Birmingham | 2013 |
| Aston Snooker Club Ltd | Birmingham | 2026 |
| Aston Spencer London Ltd | Manningtree | 2022 |
| Aston Spring Farm Limited | Sheffield | 2014 |
| Aston Villa FC Limited | Birmingham | 1990 |
| Aston Villa Football Club Limited | Birmingham | 1997 |
| Aston Villa Limited | | 1896 |
| Aston Villa Social Enterprise CIC | Birmingham | 2006 |
| Aston Villa Venue Company Limited | Birmingham | 2025 |
| Aston Villa Women's Football Club Limited | Birmingham | 2013 |
| Aston Wood Golf Club Limited | Sutton Coldfield | 2012 |
| Astongold Limited | Carterton | 2006 |
| Astonishing Events Ltd | Huddersfield | 2022 |
| Astonishing Luxury Events Limited | Westerham | 2025 |
| Astonishing Productions Limited | Ilford | 2018 |
| Astonishing Records Limited | St Ives | 2013 |
| Astor Care Tickets Limited | Oxford | 2015 |
| Astor Curtis Limited | Dunton Green | 2017 |
| Astor Designs Ltd | London | 2015 |
| Astor Film Productions Ltd | Hull | 2018 |
| Astoria Bingo Club Limited | Nottingham | 1955 |
| Astoria Productions Limited | London | 1989 |
| Astoria Sports Wallington Limited | West Wickham | 1997 |
| Astounding Adventures Limited | Dorking | 2011 |
| Astounding Entertainment Ltd | Redhill | 2022 |
| Astra Entertainment Limited | London | 2025 |
| Astra NW Limited | Manchester | 2025 |
| Astra Partners Ltd | London | 2021 |
| Astra Sports Management Ltd | London | 2019 |
| Astrabound Limited | Doncaster | 2007 |
| Astraea Film and Theatre Productions Limited | Aldeburgh | 2021 |
| Astraea Magni Limited | Glasgow | 2023 |
| Astraea Theatre CIC | Ivybridge | 2024 |
| Astraeus Production Limited | London | 2020 |
| Astragiant Limited | Glasgow | 1999 |
| Astral Design Limited | Chatham | 2019 |
| Astral Film and Advertising Limited | Ruislip, | 2025 |
| Astral Projections Film Company Ltd. | London | 2020 |
| Astral Projections Lighting Ltd | Isleworth | 2019 |
| Astral Wave Limited | Liverpool | 2020 |
| Astramare Limited | Barnet | 2017 |
| Astravaganza Entertainment Ltd | Stanley | 2013 |
| Astrazilla Ltd | Rugby | 2021 |
| Astrella Academy of Football Limited | Southampton | 2019 |
| Astrellar Limited | Belfast | 2018 |
| Astrid Harris Coaching Limited | Poole | 2022 |
| Astro 1 Limited | Ruislip | 2004 |
| Astro Bowl Limited | Birmingham | 2010 |
| Astro Cat Events Limited | Ross-On-Wye | 2022 |
| Astro Competitions Limited | London | 2025 |
| Astro Drone Shows Ltd | Newark | 2026 |
| Astro Gymnastics | Glasgow | 2012 |
| Astro Kings Ltd | Nottingham | 2015 |
| Astro Pitches Ltd | Rossendale | 2020 |
| Astrocade Ltd | Peterborough | 2025 |
| Astrofoxx Ltd | London | 2026 |
| Astrogem Music Limited | Hayes | 2012 |
| Astronomy Ltd | Lytham St. Annes | 2022 |
| Astropace Limited | Loughborough | 2024 |
| Astroplanet Ltd | London | 2025 |
| Astrosoccer 4 U Ltd | Croydon | 2003 |
| Astrum Limited | Poole | 1998 |
| Astrup Agencies Limited | Birmingham | 2002 |
| Astta Ltd | Grantham | 2014 |
| Astudiodesigns Ltd | London | 2021 |
| ASV Consulting Limited | West Wickham | 2018 |
| Aswarm | London | 2015 |
| Aswatna Studio Ltd | London | 2026 |
| Asylum | London | 2012 |
| Asylum 33 Limited | London | 2014 |
| Asylum Artist Quarter CIC | Wolverhampton | 2019 |
| Asylum Arts C.I.C. | London | 2021 |
| Asylum Fitness Ltd | Bootle | 2020 |
| Asylum Giant Ltd | London | 2012 |
| Asylum Gyms Ltd | Kilmarnock | 2020 |
| Asylum Media Ltd | London | 2017 |
| Asylum Skateparks Limited | Sutton-In-Ashfield | 2013 |
| Asylum Weightlifting Club Ltd. | Newtownards | 2019 |
| Asylum Wrestling Limited | Glasgow | 2021 |
| AT Adventures Ltd | Laurencekirk | 2025 |
| AT Creates Ltd | London | 2018 |