| Alaaddin CDO Ltd | London | 2018 |
| Alaamah Ltd | London | 2025 |
| Alaandigital Ltd | London | 2025 |
| Alaatel Ltd | London | 2014 |
| Alabama 3 Touring Ltd | London | 2024 |
| Alabaro Technology Ltd | London | 2018 |
| Alabaster Films Ltd | London | 2025 |
| Alabaster Media Limited | Wimborne | 2023 |
| Alabaster Pictures Limited | London | 2025 |
| Alabs IT Solutions Limited | Liversedge | 2022 |
| Alacer Ltd | Stockton-On-Tees | 2017 |
| Alacer Software Limited | Cambridge | 2005 |
| Alacer Technical Services Limited | Cambridge | 2022 |
| Alaco Analytics Limited | London | 2019 |
| Alacran Group Ltd | Wokingham | 2018 |
| Alacran International Ltd | Wokingham | 2020 |
| Alacrify Foundation CIC | Dorchester | 2019 |
| Alacrify Ltd | Dorchester | 2005 |
| Alacrity Business Solutions Limited | Dartford | 2015 |
| Alacrity Group Limited | London | 2016 |
| Alacrity Growth Ltd | London | 2025 |
| Alacrity Integrated Ltd | Surrey | 2007 |
| Alacrity Projects Limited | London | 2014 |
| Alacrity Solutions Limited | Bedford | 2023 |
| Alacryon Ltd | Hemel Hempstead | 2025 |
| Aladdin AGI Research Ltd. | London | 2024 |
| Aladdin Films Limited | Buckhurst Hill | 2025 |
| Aladdin Healthcare Technologies Ltd | London | 2017 |
| Aladdin Slots Ltd | Bristol | 2026 |
| Aladdin Technologies Ltd | Edgware | 2025 |
| Aladdin Technology Solutions Ltd | London | 2019 |
| Aladdino for Import & Export Private and General Trading Company Limited | Sheffield | 2024 |
| Alade Consulting Ltd | Dartford | 2026 |
| Aladef Global Ltd | London | 2024 |
| Aladen Limited | Northampton | 2026 |
| Aladin Eco UK Ltd | London | 2021 |
| Aladin Partners Ltd | Cobham | 2016 |
| Aladins Wunder Ltd | Broadstairs | 2019 |
| Aladore Ltd | Ipswich | 2023 |
| Aladstech Ltd | Birmingham | 2025 |
| Alafia & Isimi Ltd | Oldbury | 2025 |
| Alag Film Limited | Luton | 2023 |
| Alagar Consulting Limited | London | 2020 |
| Alagbala Limited | Hyde | 2018 |
| Alai Solutions Ltd | Manchester | 2025 |
| Alain Bety Ltd | London | 2016 |
| Alain Charles Publishing (Travel) Ltd. | London | 1991 |
| Alain Charles Publishing Limited | London | 1974 |
| Alain Charles Specialist Publishing Limited | London | 1991 |
| Alaisiagae Productions Ltd | Ilford | 2018 |
| Alakat Publishing Limited | Uckfield | 2011 |
| Alakazam Ltd. | Buckinghamshire | 1995 |
| Alake Consulting Limited | Leeds | 2014 |
| Alam & Sons Ltd | London | 2025 |
| Alam Investment Group Limited | Dudley | 2026 |
| Alam IT Services Limited | Warrington | 2025 |
| Alam IT Solutions Limited | Manchester | 2015 |
| Alam Syndicates Limited | London | 2023 |
| Alama Ltd | London | 2024 |
| Alamaberger Incorporated Ltd | London | 2022 |
| Alamai Media Ltd | Mildenhall | 2024 |
| Alamar Associates Limited | Bradford | 2011 |
| Alamasoft Ltd | London | 2025 |
| Alamein Limited | Reading | 2000 |
| Alamex Limited | Bath | 2007 |
| Alami Adventures Limited | Liverpool | 2025 |
| Alami Holdings Ltd | London | 2026 |
| Alamo ICT Limited | Blackburn | 2004 |
| Alamo Limited | Pontefract | 2006 |
| Alamo Pictures Ltd | London | 2019 |
| Alamo Studios Limited | London | 2020 |
| Alampata Ltd | Warwick | 2014 |
| Alampati Limited | Crawley | 2009 |
| Alamsoft Ltd | Dagenham | 2016 |
| Alan a Pollard Consultancy Limited | Caernarfon | 2017 |
| Alan Beck Consultancy Limited | Hainault Business Park | 2021 |
| Alan Birkett Ltd | Tyne And Wear | 2007 |
| Alan Blackfish Ltd | Poole | 2014 |
| Alan Blumlein Ltd | Chelmsford | 2012 |
| Alan Bone Ltd | London | 2007 |
| Alan Brazil Limited | London | 2011 |
| Alan Brett Associates Limited | Reigate | 2007 |
| Alan Brown Consultancy Limited | Northampton | 2012 |
| Alan Clark Consulting Ltd | Wallingford | 2022 |
| Alan Compton Film & Photography Limited | Haywards Heath | 2013 |
| Alan Computing Limited | Glossop | 2012 |
| Alan Dedicoat Enterprises Limited | Exeter | 2008 |
| Alan Dick Communications Limited | Scunthorpe | 2011 |
| Alan Doyle Business Services Ltd | Neath | 2007 |
| Alan Ekland Limited | London | 2014 |
| Alan Ginger IT Services Limited | Bishop'S Stortford | 2014 |
| Alan HAY Consulting Limited | Edinburgh | 2024 |
| Alan Hoskins Limited | Carlisle | 2002 |
| Alan Howard Design Limited | Chipping Norton | 2009 |
| Alan Industries Ltd | Perth | 2026 |
| Alan IT Limited | Barking | 2025 |
| Alan J Murray Limited | Berkhamsted | 2011 |
| Alan Johnson CAD Services Limited | Cambridge | 2011 |
| Alan Lane Ltd | Newbury | 2025 |
| Alan Lead (UK) Limited | Bishops Stortford | 2005 |