| Alex Trading Limited | Evesham | 2014 |
| Alex UK Trade Ltd | London | 2024 |
| Alex Warwick Limited | Rugby | 2017 |
| Alex WAS Here Ltd | London | 2026 |
| Alex White Golf Limited | Leighton Buzzard | 2011 |
| Alex Widdowson Limited | Chester | 2018 |
| Alex Willan Cars Limited | Carnforth | 2007 |
| Alex Wolfe Ltd | Welling | 2022 |
| Alex Young Bakers (Scotland) Ltd | Lanark | 2026 |
| Alex Young Bakers Limited | Hamilton | 2023 |
| Alex Zono Limited | Kingston Upon Thames | 2024 |
| Alex&Er Jewellery Limited | Knutsford | 2017 |
| Alex&L Ltd | London | 2025 |
| Alex's Lifestyle Hub Ltd | Belfast | 2024 |
| Alex's Party Store Ltd | Pudsey | 2025 |
| Alex's Tyres Limited | Brighton | 2015 |
| Alex's Value PCS Ltd | Aberdeen | 2024 |
| Alex, the Leukodystrophy Charity | London | 2004 |
| Alex. Aiken & SON Ltd. | Peterhead | 1996 |
| Alex. Devon Limited | Belfast | 1973 |
| Alex. Whyte (Aberdeen) Limited | Walton On The Naze | 2016 |
| Alex.G Ltd | Barking | 2014 |
| Alex.W Limited | Cardiff | 2025 |
| ALEX2004 Ltd | Leicester | 2015 |
| ALEX22 Ltd | Manchester, England | 2025 |
| Alexa AI Productions Limited | Blackburn | 2024 |
| Alexa and Laura Limited | Ashford | 2017 |
| Alexa Consulting Limited | Great Missenden | 2016 |
| Alexa EVE Limited | Swindon | 2022 |
| Alexa Group Ltd | Leeds | 2019 |
| Alexa Interiors Ltd | Bromsgrove | 2025 |
| Alexa IT Limited | Glenrothes | 2026 |
| Alexa Lounge Limited | Glasgow | 2025 |
| Alexa Pro Tint Limited | Waterlooville | 2025 |
| Alexa RO Ltd | London | 2021 |
| Alexa Rose Ltd | Stoke-On-Trent | 2021 |
| Alexa Solution Ltd | Oldham | 2026 |
| Alexa&Robi Ltd | Yeovil | 2026 |
| Alexamazing Ltd | Basingstoke | 2025 |
| Alexan Enterprises Ltd | Sunderland | 2025 |
| Alexandar Ltd | Crawley | 2023 |
| Alexander & Alexander Ltd | Cardiff | 2026 |
| Alexander & Grace Ltd | Epsom | 2020 |
| Alexander & Green Ltd | London | 2020 |
| Alexander & Parsons Limited | Cardiff | 1973 |
| Alexander & Rathor Limited | Newbury Park | 2009 |
| Alexander & Ward Roofing Limited | Fife | 1973 |
| Alexander (Motor Services) Limited | Leicestershire | 2004 |
| Alexander (Scotland) & Co Limited | Stirling | 2001 |
| Alexander Aesthetics Ltd | Milton Keynes | 2025 |
| Alexander and Duncan,Limited | Herefordshire | 1912 |
| Alexander and James Limited | Milton Keynes | 2013 |
| Alexander and Sancto Limited | Kendal | 2009 |
| Alexander Art in Exmoor Limited | Minehead | 2024 |
| Alexander Asset Management Limited | Glazebrook | 2005 |
| Alexander Aurelius Auctions Ltd | Harrow | 2021 |
| Alexander Automobiles Ltd | Barnet | 2026 |
| Alexander Autos Portsmouth Limited | Portsmouth | 2018 |
| Alexander Bejewels Costumes Ltd | Middlesbrough | 2026 |
| Alexander Books Limited | Hayling Island | 2017 |
| Alexander Bradwell Ltd | Milton Keynes | 2018 |
| Alexander Brooks & SON Limited | Lanark | 1962 |
| Alexander Brown Ltd | London | 2017 |
| Alexander Cake Automotive Consultancy Limited | Luton | 2019 |
| Alexander Car Sales Ltd | Harlow | 2023 |
| Alexander Cars Limited | Billericay | 2023 |
| Alexander Castle Limited | Glasgow | 2015 |
| Alexander Clayton-Payne Ltd | London | 2025 |
| Alexander Clementine Ltd | Brighton | 2019 |
| Alexander Cohane Limited | Banbury | 2006 |
| Alexander Commerce Limited | Winchester | 2025 |
| Alexander Construction (Yorkshire) Limited | Hull | 2020 |
| Alexander Crow Limited | Stowmarket | 2013 |
| Alexander Daniel & Co Limited | Droylsden | 2014 |
| Alexander David Motor Company Limited | Woking | 1999 |
| Alexander Dork Limited | Dorking | 2026 |
| Alexander Dunlop Limited | Ayr | 2025 |
| Alexander Duvis Ltd | London | 2019 |
| Alexander Dylan Ltd | London | 2026 |
| Alexander E Grace Ltd | London | 2021 |
| Alexander Ellis Ltd | Beverley | 2011 |
| Alexander Engineering Co Ltd | Ramsgate | 2019 |
| Alexander Engraving Limited | Sheffield | 2008 |
| Alexander Equestrian Ltd | Wellingborough | 2025 |
| Alexander Fell Ltd | Fordingbridge | 2026 |
| Alexander Figo Ltd | London | 2020 |
| Alexander Fisher Fine Jewellery Ltd | Alderley Edge | 2022 |
| Alexander Foster Fine Art Ltd | Reading | 2016 |
| Alexander Framing Limited | Canterbury | 2008 |
| Alexander Fraser & SON Trading Limited | Brentwood | 2014 |
| Alexander Gage Opticians Limited | Darwen | 1996 |
| Alexander George Fine Antiques Limited | Faringdon | 2016 |
| Alexander Gibson Ltd | Cardiff | 2015 |
| Alexander Greek Foods Ltd | Goudhrust | 2020 |
| Alexander Green Offices Limited | Hatfield | 2019 |
| Alexander Greens Retail Ltd | Cardiff | 2016 |
| Alexander Hadleigh Wine Merchants and Importers Limited | Southampton | 1984 |
| Alexander Hanna Limited | Co Down | 1958 |
| Alexander Harper Aviation & Security Ltd | Farnham | 2014 |
| Alexander House Interiors Ltd | Manchester | 2020 |