| Alastair Ross Ltd | Bucks | 2002 |
| Alaw Owen CYF | St. Asaph | 2022 |
| Alawasports Ltd | Leeds | 2022 |
| ALB 369 Ltd | London | 2026 |
| ALB Core Limited | Surbiton | 2025 |
| Alba Entertainments Limited | Fife | 2007 |
| Alba Racing Limited | Lockerbie | 2009 |
| Alba Susagna Ltd | London | 2025 |
| Albalance Limited | London | 2024 |
| Alban Ryde Productions Ltd | Manchester | 2024 |
| Albane Courtois Ltd | Sudbury | 2017 |
| Albanian Athletes Group UK Ltd | Caterham | 2020 |
| Albany (Rock Ferry) Bowling Club Limited | Wirral | 1921 |
| Albany Productions Limited | Coventry | 2019 |
| Albatec Sport Limited | Dumfries | 2012 |
| Albatros Productions Limited | Watford | 1985 |
| Albatross Club Limited | London | 2015 |
| Albatross Entertainments Limited | Godalming | 2017 |
| Albatross Golf Ltd | London | 2021 |
| Albatross Paragliding Limited | Liss | 2017 |
| Albatross Professional Limited | London | 2024 |
| Albatross Theatre Ltd | Gateshead | 2025 |
| Albayaa Media Ltd | London | 2026 |
| Albdm Limited | London | 2017 |
| Albert Bridge Securities Limited | | 1995 |
| Albert FC Ltd | Larkhall | 2024 |
| Albert Innes Leisure Limited | Chorley | 2023 |
| Albert Riley Limited | | 1999 |
| Albert Road Boxing Club Limited | Hampshire | 2025 |
| Albert Road Community Hub Limited | Halifax | 2018 |
| Albert Stebbings Music Limited | St. Albans | 2020 |
| Alberto Hernández Studio Ltd | Bristol | 2023 |
| ALBI10 Limited | Liverpool | 2023 |
| Albie Art Ltd | Stamford | 2019 |
| Albie Media Ltd | Leighton Buzzard | 2024 |
| Albion Audio Limited | London | 2020 |
| Albion Chamber Orchestra Limited | London | 2024 |
| Albion Equine Limited | Trimdon Station | 2018 |
| Albion Football Club(Burton-On-Trent)Limited(The) | Burton On Trent | 1950 |
| Albion House 2004 Limited | Liverpool | 2005 |
| Albion House Limited | Liverpool | 1985 |
| Albion Records | Kent | 2005 |
| Albion Rovers Football Club, Ltd. (the) | Coatbridge | 1919 |
| Albion Running Limited | Taunton | 2014 |
| Albion Sports (Bradford) CIC | Bradford | 2017 |
| Albireo Live Ltd | Lymm | 2024 |
| Albone Racing Development Ltd | Sandy | 2019 |
| Alborz Fitness Limited | London | 2021 |
| Albourne Ltd | Mill Hill | 2003 |
| Albrighton & Woodland Hunt Limited | Stoke-On-Trent | 2007 |
| Albumen Project Ltd | London | 2013 |
| Albury Sports Club Limited | Guildford | 2013 |
| ALC Media Ltd | Wrotham Heath | 2023 |
| ALC Training Ltd | London | 2026 |
| Alcaino Creative Ltd | London | 2022 |
| Alcara Enterprises Ltd | Amersham | 2010 |
| Alcester Town Football Club (1927) Limited | Alcester | 2011 |
| Alchemation Limited | Sutton | 2018 |
| Alcheme Wellbeing Ltd | Tadworth | 2017 |
| Alchemedia Pictures Ltd | London | 2022 |
| Alchemist Media Limited | London | 2005 |
| Alchemist Special Effects Limited | High Peak | 2017 |
| Alchemy 3 D C Limited | Crawley | 2002 |
| Alchemy App Wellness Ltd | Leeds | 2021 |
| Alchemy Arts Limited | Manchester | 2012 |
| Alchemy Connected Fitness Ltd | Enterprise Park Initiative | 2024 |
| Alchemy Fireworks Limited | Ampthill | 2007 |
| Alchemy Fitness Ltd | Waterlooville | 2011 |
| Alchemy for the EYE Ltd | Norwich | 2011 |
| Alchemy INK and Art Ltd | Bathgate | 2020 |
| Alchemy Inkz Ltd | London | 2026 |
| Alchemy Moon Tattoo Collective Ltd | Tamworth | 2019 |
| Alchemy Music Limited | London | 1978 |
| Alchemy PR Limited | Axminster | 2002 |
| Alchemy Productions (London) Limited | Edenbridge | 2016 |
| Alchemy Training Ltd | Southampton | 2007 |
| Alcohol Uncensored Ltd | Cheadle | 2025 |
| Alconbury Weald Community Association C.I.C. | Huntingdon | 2024 |
| Alconleigh Limited | London | 2013 |
| Alconleigh Supply Ltd | Westerham | 2025 |
| Alda MX Design Ltd | London | 2023 |
| Aldage Books Publishing Limited | London | 2017 |
| Aldalis Trading Ltd | London | 2016 |
| Aldebaran Club | London | 1999 |
| Aldeburgh Cinema Trust | Aldeburgh | 2013 |
| Aldeburgh Comedy Weekend Limited | Chesham | 2025 |
| Aldeburgh Food and Drink Festival C.I.C. | Norwich | 2008 |
| Aldeburgh Rugby Club Community Interest Company | Saxmundham | 2021 |
| Aldenham Enterprises Ltd | Hertfordshire | 1982 |
| Aldenham Golf & Country Club Limited(The) | Radlett | 1984 |
| Alder and Alder Limited | Exeter | 2005 |
| Alder Archaeology Ltd | Perth | 2009 |
| Alder Bennett Ltd | London | 2025 |
| Alder Holdings(Nw) Limited | Bolton | 2025 |
| Alderbury FC Limited | Salisbury | 2013 |
| Alderford Lake Ltd | Whitchurch | 2022 |
| Alderley Edge Golf Club Limited | Alderley Edge | 1967 |
| Aldersbrook Bowling Club Limited(The) | London | 1921 |
| Aldersbrook Rangers CIC | London | 2025 |
| Aldersbrook Rangers Football Club Limited | London | 2025 |