| Albion Workplace Solutions Limited | Aberdare | 2009 |
| Albones and Combs Limited | Keighley | 2020 |
| Alborough Ltd | Exeter | 2023 |
| Alboys Ltd | London | 2024 |
| Albri FUN Ltd | London | 2024 |
| Albright Commercial Cleaning (Lewes) Limited | Shoreham-By-Sea | 2018 |
| Albrita Limited | Ashford | 2017 |
| Albro Services Limited | Hemel Hempstead | 2020 |
| Albu Arabi - Investment, Development & Trading Ltd | Hendon | 2016 |
| Album Creative Limited | Liverpool | 2022 |
| Alburaq Group Ltd | Cardiff | 2025 |
| Albury Ventures Ltd | Weybridge | 2018 |
| Alburz Tech Limited | London | 2020 |
| Albyn Engineering Hub Ltd. | Edinburgh | 2019 |
| Albyn School Limited | Aberdeen | 1948 |
| Albz Barbers Ltd | South Croydon | 2017 |
| ALC Aesthetics Limited | St. Helens | 2020 |
| ALC Services Ltd | London | 2026 |
| Alcala INK Ltd | Norwich | 2020 |
| Alcarbon Ltd | London | 2025 |
| Alcatraz Limited | Manchester | 2021 |
| Alcema Plant Limited | Droitwich | 2023 |
| Alcester Barber Shop Limited | Birmingham | 2016 |
| Alcester Tyres Ltd | Bristol | 2016 |
| Alchemax Analytics Limited | Swindon | 2017 |
| Alchemic Designs Ltd | London | 2025 |
| Alchemise Yoga Ltd | Newport Pagnell | 2018 |
| Alchemist Aesthetics Birmingham Limited | Leeds | 2024 |
| Alchemist Aesthetics Ltd | Sheffield | 2017 |
| Alchemist HSR and Restoration Services Ltd | Liverpool | 2021 |
| Alchemist Investments Unlimited N.I. | Londonderry | 2018 |
| Alchemists Marketing Limited | London | 2024 |
| Alchemy & I Collective Ltd | Berkhamsted | 1994 |
| Alchemy & I Group Limited | Berkhamsted | 2022 |
| Alchemy & I Limited | Berkhamsted | 2018 |
| Alchemy Aesthetics & Well-Being Limited | Sudbury | 2021 |
| Alchemy Barber Shop Ltd | Bathgate | 2020 |
| Alchemy Consultancy (UK) Ltd | London | 2007 |
| Alchemy Crystal Bowls Limited | Glossop | 2026 |
| Alchemy Developments (Scot) Ltd. | Glasgow | 2018 |
| Alchemy Energy Group Limited | London | 2014 |
| Alchemy Energy Limited | London | 2014 |
| Alchemy Energy Technology Limited | London | 2017 |
| Alchemy Event Productions Limited | Portavogie | 2008 |
| Alchemy Gardens Ltd | Malvern | 2006 |
| Alchemy Grove Holistic Therapy Ltd | Sheffield | 2025 |
| Alchemy Hair and Aesthetics Limited | Glasgow | 2014 |
| Alchemy Hair Limited | Moreton-In-Marsh | 2017 |
| Alchemy HG Ltd | London | 2021 |
| Alchemy International Training Accademy Limited | London | 2025 |
| Alchemy Male Image Ltd | Lisburn | 2025 |
| Alchemy MCR Ltd | Huddersfield | 2024 |
| Alchemy of Colour Ltd | Cardiff | 2023 |
| Alchemy Organic Salons Ltd | Basingstoke | 2019 |
| Alchemy Personnel Limited | London | 2017 |
| Alchemy Project Services Limited | Bristol | 2009 |
| Alchemy Skin LAB Ltd | London | 2025 |
| Alchemy Sport and Beauty Limited | Milton Keynes | 2013 |
| Alchemy Tattoo Limited | Wigan | 2016 |
| Alchemy Transformation Limited | Stoke-On-Trent | 2018 |
| Alchemy Yoga Studio Ltd | Pershore | 2025 |
| Alchemyofcheshire Ltd | Over Alderley | 2021 |
| Alck Electrical Solutions Limited | High Wycombe | 2019 |
| Alco Hedge Limited | London | 2025 |
| Alco Systems Limited | Rochford | 2020 |
| Alco Valves Holdings Limited | Brighouse | 2020 |
| Alcoblock Ltd | Wellingborough | 2021 |
| Alcock Lees Partnership Limited | Norwich | 2007 |
| Alcohol & Drug Testing Services Ltd | Bury St. Edmunds | 2025 |
| Alcohol Focus Scotland | | 1985 |
| Alcohol Free Coach Ltd | Bagshot | 2025 |
| Alcohol Monitoring Systems Limited | Stockport | 2012 |
| Alcohol Research UK | London | 2010 |
| Alcola Limited | London | 2012 |
| Alcombe Nature Reserve Limited | Wells | 2010 |
| Alcon Performance Engineering Group Limited | London | 2013 |
| Alconbury Lawn Care Ltd | St. Neots | 2022 |
| Alcop Ltd | Stroud | 2011 |
| Alcumet Trading Limited | London | 2015 |
| Alcuts Ltd | Bromley | 2022 |
| Alcyone Bespoke Jewellery Ltd | London | 2026 |
| Alcyr Ltd | London | 2024 |
| ALD Company (Kent) Limited | West Malling | 2023 |
| ALD Hairdressing Training Academy Ltd | Chester Le Street | 2025 |
| Alda Hair Ltd | Larkhall | 2025 |
| Alda Investments Ltd | Barrow-In-Furness | 2014 |
| Aldar Community Centre | Manchester | 2018 |
| Aldar Energy Ltd | London | 2019 |
| Aldbrickham Limited | Bournemouth | 2020 |
| Aldbury Community Support | Tring | 2020 |
| Alde Valley Spring Festival Limited | Saxmundham | 2011 |
| Aldea Bella (NO.5) Limited | Glasgow | 1989 |
| Aldebaran Engineering Ltd | Lowestoft | 2016 |
| Aldebaran Innovations Limited | London | 2007 |
| Aldeburgh Physio and Pilates Studio Limited | Aldeburgh | 2026 |
| Aldeburgh Yacht Club | Suffolk | 2005 |
| Aldeia Caboclo DO SOL NAS Aguas DE Oxum CIC | Mitcham | 2025 |
| Aldel Designs Limited | Borehamwood | 2017 |
| Alden Legal Limited | London | 2017 |
| Alden Trading (Manchester) Limited | London | 1996 |