| Alexander Campbell Productions Limited | London | 2021 |
| Alexander Cargill Ltd | Edinburgh | 2014 |
| Alexander Corporate Events Ltd | Liverpool | 2020 |
| Alexander Dakers Ltd | Bournemouth | 2024 |
| Alexander DI Carcaci Limited | London | 2003 |
| Alexander Gallery Ltd | Bristol | 2002 |
| Alexander Gibbons Audio Ltd | Cardiff | 2025 |
| Alexander Groom Fine Art Ltd | Farnham | 2023 |
| Alexander GUY World Enterprises Ltd | Glasgow | 2024 |
| Alexander Imagery Ltd | Oldham | 2023 |
| Alexander Imaging Limited | Watford | 2012 |
| Alexander J Shaw Ltd | Derby | 2021 |
| Alexander John Limited | Ogmore-By-Sea | 2019 |
| Alexander Krige Ltd | Sutton | 2025 |
| Alexander Millar Fine Art Ltd | Wallsend | 2016 |
| Alexander Park Resort Limited | Ledbury | 2015 |
| Alexander Song Limited | Manchester | 2019 |
| Alexander Wells Limited | Sheffield | 2020 |
| Alexander Whitley Dance Company | Ipswich | 2013 |
| Alexanderplumb Limited | Salisbury | 2017 |
| Alexandra AW Management Ltd | Plymouth | 2024 |
| Alexandra Bastedo (Champions) Animal Sanctuary Limited | Pulborough | 2009 |
| Alexandra Community Sports and Leisure Centre Ltd | Scarborough | 2003 |
| Alexandra Daisy Ginsberg Ltd | Marlow | 2013 |
| Alexandra Dariescu Productions Ltd | London | 2017 |
| Alexandra Dawson Wellness Ltd | Huntingdon | 2010 |
| Alexandra Dunn Racing Ltd | Wellington | 2012 |
| Alexandra Duzevic Limited | London | 2005 |
| Alexandra Green Limited | London | 2022 |
| Alexandra Hall Halifax Ltd | Chester | 2025 |
| Alexandra Harwood Limited | Chorleywood | 2021 |
| Alexandra Mckenzie PT Ltd | Workington | 2025 |
| Alexandra Pavone Dance Ltd | Sheffield | 2024 |
| Alexandra Productions Limited | London | 1958 |
| Alexandra Socials Ltd | Sheffield | 2024 |
| Alexandra United FC Limited | Tadworth | 2019 |
| Alexandra Yacht Club Limited | Southend-On-Sea | 1979 |
| Alexandra's Africa Ltd | Southampton | 2012 |
| Alexandra's Billiard's Hall Limited | Nelson | 2025 |
| Alexandria COE Ltd | Woodbridge | 2020 |
| Alexandros Ltd | London | 2019 |
| Alexandrumaiculita Limited | Ilford | 2017 |
| Alexarciab Content Ltd | Bury St. Edmunds | 2024 |
| Alexercise Ltd | Caerphilly | 2018 |
| Alexerin Management Limited | Liverpool | 2020 |
| Alexes Promotions Limited | Orpington | 2019 |
| Alexis Rose Ltd | Poole | 2024 |
| Alexis Stone Ltd | Minsterworth | 2021 |
| Alexis Taylor Fans Ltd | London | 2021 |
| Alexis Taylor Limited | London | 2007 |
| Alextra Academy Ltd | London | 2024 |
| ALEXVAS80 Limited | Bridgwater | 2020 |
| Alexwalmsley Limited | St. Helens | 2024 |
| ALF Shrubb Memorial Race CIC | Horsham | 2024 |
| ALF Works Ltd | Harrow | 2025 |
| Alf's Classic Amusements Ltd | Motherwell | 2021 |
| Alfa Coaching Ltd | Birmingham | 2021 |
| Alfa Life Ltd | Cardiff | 2022 |
| Alfa Mist Ltd | London | 2016 |
| Alfalfa Bloat Limited | Norwich | 2013 |
| Alfano Consultancy Ltd | Stoke-On-Trent | 2024 |
| Alff a BET Limited | Welshpool | 2017 |
| Alfie 14 Limited | Llantarnam Industrial Park | 2005 |
| Alfie Audio Ltd | Kingston Upon Thames | 2026 |
| Alfie Caine Limited | Stanmore | 2021 |
| Alfie Davis Ltd | London | 2023 |
| Alfie DI Trolio Limited | London | 2023 |
| Alfie James Productions Limited | Colchester | 2020 |
| Alfie Joey Limited | Gateshead | 2007 |
| Alfie Phillips Ltd | Bloxham | 2022 |
| Alfie Photo Booths Limited | Exeter | 2013 |
| Alfie Rocks Ltd | London | 2021 |
| ALFIE-32CRABSTICKS Ltd | Halifax | 2015 |
| Alfie-Eric Ltd | Stalybridge | 2024 |
| Alfons Valls Design Limited | London | 2015 |
| Alford & District Civic Trust Limited | Alford | 1967 |
| Alford Manor House Limited | Alford | 2011 |
| Alfred Dunhill Links Foundation | Edinburgh | 2011 |
| Alfred Haig Limited | London | 2023 |
| Alfresco Active Ltd | Oxford | 2022 |
| Alfresco Adventures Limited | Richmond | 2012 |
| Alfresco Disco Events Limited | Newquay | 2014 |
| Alfresco Fitness Ltd | Burton On Trent | 2015 |
| Alfresco Health Limited | Burton On Trent | 2026 |
| Alfresco Holdings Ltd | Burton On Trent | 2024 |
| Alfresco Leisure Limited | Burton On Trent | 2020 |
| Alfreton Amateur Boxing Club Community Interest Company | Heanor | 2024 |
| Alfreton Cricket Club Limited | Fritchley | 2011 |
| Alfreton Music Tuition Limited | Alfreton | 2025 |
| Alfreton Town FC | London | 2026 |
| Alfreton Town Football Club Limited | Derby | 1986 |
| ALG Active Learning Centres Limited | Milton Keynes | 2021 |
| ALG Cognita Limited | Milton Keynes | 2008 |
| Algarve - Golf (U.K.) Limited | Chesterfield | 1994 |
| Algn Studio Ltd | Tunbridge Wells | 2026 |
| Algorhythm Music Group Ltd | London | 2024 |
| ALH Fitness Ltd | Billericay | 2023 |
| ALH Wellness Limited | Leeds | 2024 |
| Alhambra Theatre Landholdings Limited | Edinburgh | 2013 |
| Alhambra Theatre Limited | Edinburgh | 2008 |