| Alex Allan Motor Engineers Ltd | Glasgow | 2022 |
| Alex ARC Ltd | London | 2025 |
| Alex Auto Motors Limited | Stourport-On-Severn | 2025 |
| Alex Begg Group Limited | Ayr | 1949 |
| Alex Bicket Limited | Ayrshire | 1982 |
| Alex Bishop Guitars Limited | Bristol | 2023 |
| Alex Boyd Ltd | Robertsbridge | 2020 |
| Alex Brick Pointing Limited | South Ockendon | 2025 |
| Alex D.A.G. Limited | Corby | 2017 |
| Alex Dadswell Carpentry Ltd | Heathfield | 2020 |
| Alex Dalgetty & Sons Limited | Galashiels | 2010 |
| Alex Dodman Ltd | Saffron Walden | 2016 |
| Alex Gales Limited | Whitley Bay | 2022 |
| Alex Gali Limited | London | 2017 |
| Alex Gooch Artisan Baker Limited | Hereford | 2012 |
| Alex Graham Bakers and Catering Limited | Kilsyth | 2011 |
| Alex Hamilton Tech Ltd | Liverpool | 2024 |
| Alex Henebury Limited | London | 2006 |
| Alex Hull Studio Limited | London | 2012 |
| Alex James Hunt Ltd | York | 2023 |
| Alex Jane Limited | Magherafelt | 2016 |
| Alex Joinery&Carpentery Ltd | Bedford | 2020 |
| Alex Kimber Design Ltd | Eastleigh | 2021 |
| Alex Kirkwood & SON Limited | Edinburgh | 2016 |
| Alex LE MEZ Ltd | Norwich | 2022 |
| Alex Lockwood Limited | | 2006 |
| Alex Mackay (Printers and Stationers) Limited | Paisley | 1967 |
| Alex Martin GUN and Rifle Makers Limited | Dunkeld | 1999 |
| Alex Mcdougall (Mowers) Limited | East Kilbride | 1996 |
| Alex Monroe Limited | London | 2006 |
| Alex Moulton Consulting Limited | Bradford-On-Avon | 2014 |
| Alex Moulton Limited | Bradford-On-Avon | 2014 |
| Alex Phillips Printing Services Limited | Lancashire | 2002 |
| Alex Plastics Ltd | Southall | 2023 |
| Alex Pole Ltd | Bridport | 2020 |
| Alex Price Ltd | Bristol | 2020 |
| Alex RAE Mechatronics Limited | North Tawton | 2003 |
| Alex Repair Auto Ltd | Barking | 2016 |
| Alex Rouse WIG Company Ltd | London | 2002 |
| Alex Russell Ltd | Leeds | 2024 |
| Alex Scougal Bolting Services Ltd | Ashington | 2019 |
| Alex Shelton Limited | Middlesbrough | 2026 |
| Alex Smith Guns Ltd | Winchester | 2019 |
| Alex Squared Dairy Trading & Aviation Services Ltd | Wirral | 2019 |
| Alex Thomas Plumbing & Heating Ltd | Menai Bridge | 2015 |
| Alex Torok Ltd | West Sussex | 2007 |
| Alex Trans Services Ltd | Canterbury | 2023 |
| Alex Valve&Control Ltd | Cambridge | 2025 |
| Alex Walker Kitchens Limited | Buxton | 2016 |
| Alex Wenham Limited | Oxford | 2016 |
| Alex Woodworks London Ltd | Dagenham | 2018 |
| Alex&Artin Bakery Ltd | Waltham Abbey | 2015 |
| Alex&Catering Ltd | Dundee | 2025 |
| Alex's Cake Boutique Limited | Crowborough | 2016 |
| Alex. Fullerton Engineering Limited | Shetland | 2004 |
| Alexa Bakes Ltd | Chesham | 2023 |
| Alexa Horizon Ltd | Salford | 2023 |
| Alexa Lily Limited | Guildford | 2024 |
| Alexander & William Limited | Nottingham | 2025 |
| Alexander Accessories Limited | Loughborough | 2002 |
| Alexander Aviation Ltd | Cannock | 2017 |
| Alexander Blinds & Furniture Ltd | Glasgow | 2010 |
| Alexander Boyd Displays Limited | Co Antrim | 1961 |
| Alexander Bullock Furniture Ltd | Cardiff | 2003 |
| Alexander Carpentry Ltd | Radstock | 2021 |
| Alexander Carrick Furniture Limited | Newcastle Upon Tyne | 2000 |
| Alexander Carrick Ltd | Hexham | 2019 |
| Alexander Chase Limited | Windsor | 2024 |
| Alexander Christian Ltd | Mold | 2010 |
| Alexander Cleghorn (Purchases) Limited | | 1989 |
| Alexander Cleghorn Limited | London | 1958 |
| Alexander Comley Limited | Kingswinford | 2017 |
| Alexander DE Araújo Limited | Dorset | 2025 |
| Alexander Dennis Limited | Larbert | 2004 |
| Alexander Duckham & Co.,Limited | Batley | 1920 |
| Alexander Duncan (Aberdeen) Limited | Aberdeenshire | 1961 |
| Alexander Electrical Solutions Limited | Fleetwood | 2016 |
| Alexander Engineering Solutions Ltd | Southampton | 2024 |
| Alexander Fitzpatrick Ltd | Chester | 2006 |
| Alexander Ford Furnishings Limited | Ellesmere Port | 2020 |
| Alexander Frano Ltd. | London | 2020 |
| Alexander Gabriel Ltd | London | 2026 |
| Alexander Gardner, Limited | Renfrewshire | 1923 |
| Alexander Higgins and Sons (1987) Limited | Nr Stroubridge | 1987 |
| Alexander Joseph Lighting Limited | London | 2018 |
| Alexander Joshua Limited | Quorn | 2021 |
| Alexander Jules Limited | Stanmore | 2020 |
| Alexander Kneller Ltd | London | 2024 |
| Alexander Linn Ltd | Glasgow | 2021 |
| Alexander Mccall-Smith Limited | Edinburgh | 2011 |
| Alexander Miller Exports Ltd | Cardiff | 2020 |
| Alexander Miller Sports Academy Ltd | London | 2024 |
| Alexander Noble and Sons Limited | | 1955 |
| Alexander ORR Machinery Repairs Ltd | Wishaw | 2022 |
| Alexander Pollock Limited | East Lothian | 1969 |
| Alexander Ritchie & SON, Limited | East Linton | 1950 |
| Alexander Ross Bespoke Ltd | Hitchin | 2025 |
| Alexander Scott & SON Limited | Co.Londonderry | 1947 |
| Alexander Technologies Europe Limited | Peterlee | 1984 |
| Alexander Trailers Limited | Altrincham | 2006 |