| Alcatraz Storage Limited | Leeds | 2000 |
| Alcazar Security Limited | Ludgershall | 2025 |
| Alcea Ltd | London | 2008 |
| Alcedo Games Ltd | London | 2025 |
| Alces Malchis Limited | Macclesfield | 1998 |
| Alces Software Limited | Bicester | 2008 |
| Alchedev Ltd | Mitcham | 2024 |
| Alchem Engineering Ltd | Shetland | 2020 |
| Alchem Technologies, Ltd. | London | 2023 |
| Alchem-Ai Ltd | Wareham | 2023 |
| Alchemai Consulting Ltd | Dulverton | 2026 |
| Alchemed Limited | Guildford | 2022 |
| Alchemedia Group Ltd | Oakham | 2020 |
| Alchemetryx Ltd | London | 2026 |
| Alchemic Coach Ltd | Salford | 2018 |
| Alchemic Partners Productions Limited | London | 2025 |
| Alchemical Productions Ltd | London | 2020 |
| Alchemie Medical Education Limited | London | 2010 |
| Alchemis Solutions Limited | Loughborough | 2009 |
| Alchemise Limited | London | 2024 |
| Alchemise Media Ltd | Stockport | 2024 |
| Alchemist Compliance Ltd | Thame | 2018 |
| Alchemist Corp Ltd | Birmingham | 2022 |
| Alchemist Editing Ltd | London | 2015 |
| Alchemist Film Studios Limited | London | 2017 |
| Alchemist IT Ltd | Colne | 2022 |
| Alchemist Labs Limited | Manchester | 2019 |
| Alchemist Learning and Development Limited | Falkirk | 2006 |
| Alchemist Partners Ltd | London | 2025 |
| Alchemist Productions Ltd | Kingston Upon Thames | 2023 |
| Alchemist Trading Ltd | Oxted | 2024 |
| ALCHEMIST13 Solutions Ltd | Solihull | 2025 |
| Alchemite AI Ltd | London | 2026 |
| Alchemiya Media Limited | London | 2013 |
| Alchemize Consulting Ltd | Houghton On The Hill | 2008 |
| Alchemy & Waves Group Ltd | Ruislip, | 2026 |
| Alchemy Acquisitions Ltd | Swindon | 2025 |
| Alchemy AI Ltd | Harpenden | 2018 |
| Alchemy Analytics Limited | Bishop'S Stortford | 2017 |
| Alchemy Arts Entertainment Ltd | London | 2019 |
| Alchemy Box Ltd | London | 2018 |
| Alchemy Bridge Ltd | Royston | 2025 |
| Alchemy Bros Limited | Wimborne | 2017 |
| Alchemy Business and I.T Services Limited | Warrington | 2010 |
| Alchemy Central Ltd | Liverpool | 2022 |
| Alchemy Circle Media Limited | London | 2017 |
| Alchemy Code Labs Limited | Bedford | 2026 |
| Alchemy Computer Consultants Limited | Somerset | 1995 |
| Alchemy Creations Limited | Letchworth Garden City | 2008 |
| Alchemy Data Ltd | London | 2026 |
| Alchemy Data Solutions Limited | Essex | 2004 |
| Alchemy Designs Limited | Hastings | 2009 |
| Alchemy Editorial Services Limited | Turriff | 2014 |
| Alchemy Entertainment Group Limited | Cardiff | 2024 |
| Alchemy Entertainment Ltd | London | 2018 |
| Alchemy Exchange Ltd | London | 2021 |
| Alchemy Expo Digital Limited | Cardiff | 2016 |
| Alchemy Expo Limited | Cardiff Bay | 2000 |
| Alchemy Film and TV Ltd | Sheffield | 2022 |
| Alchemy Films Limited | London | 2012 |
| Alchemy Fintech Limited | London | 2020 |
| Alchemy Five Consulting Limited | Newry | 2020 |
| Alchemy Intelligence Ltd | London | 2026 |
| Alchemy IT Ltd | Lutterworth | 2025 |
| Alchemy IT Solutions Ltd | Thirsk | 2022 |
| Alchemy Labs Ltd | London | 2026 |
| Alchemy Machines Limited | London | 2021 |
| Alchemy Marketing Limited | London | 2013 |
| Alchemy Markets Limited | London | 2017 |
| Alchemy Motion Pictures Ltd | Swadlincote | 2021 |
| Alchemy Network Ltd | Laddingford | 2019 |
| Alchemy of Business Ltd | London | 2020 |
| Alchemy of Design Ltd | London | 2018 |
| Alchemy Professional Editorial Services Ltd | Staines-Upon-Thames | 2024 |
| Alchemy Publishing Limited | Salisbury | 2024 |
| Alchemy Realm Limited | Brighton | 2025 |
| Alchemy Records Ltd | Liverpool | 2022 |
| Alchemy Software Ltd | Dartford | 2011 |
| Alchemy Soul Technologies Limited | London | 2025 |
| Alchemy Street Ltd. | London | 2013 |
| Alchemy Studios Ltd | Leamington Spa | 2023 |
| Alchemy System Integration Ltd | Walsall | 2023 |
| Alchemy Systems (Western) Ltd | Ilfracombe | 1999 |
| Alchemy Systems International Limited | Newport | 1998 |
| Alchemy Systems Training Limited | Brentwood | 2010 |
| Alchemy Technology Services Limited | London | 2017 |
| Alchemy Telco Solutions UK Ltd | Newcastle Under Lyme | 2015 |
| Alchemy Testing Solutions Limited | Woking | 2022 |
| Alchemy V Ltd | | 2007 |
| Alchemy Web UK Limited | London | 2019 |
| Alchemy Wireless Limited | Pershore | 2014 |
| Alchemy-Evolved Ltd | Crawley | 2021 |
| Alchemy-Phoenix UK Ltd | Stevenage | 2014 |
| Alchemybet Ltd | London | 2009 |
| Alchemylabx Ltd | London | 2022 |
| Alchemyst Technologies Ltd | Ashford | 2025 |
| Alchemyworks Ltd | London | 2015 |
| Alchemyx Ltd | Loughborough | 2024 |
| Alchera Data Technologies Ltd | Cambridge | 2016 |
| Alchetech Ltd | London | 2024 |