| Alevia Nova Ltd | London | 2025 |
| Alevian Health Ltd | London | 2025 |
| Alevyn Ltd | London | 2014 |
| Alewood Group Ltd | Stockton-On-Tees | 2025 |
| Alex & Nicholas Limited | Surbiton | 2014 |
| Alex Bacon Consulting Services Limited | Wimborne | 2007 |
| Alex Baldwin Ltd | London | 2024 |
| Alex Baranowski Limited | Redditch | 2014 |
| Alex Barker Consulting Ltd | Bristol | 2019 |
| Alex Bassford Ltd | Stevenage | 2026 |
| Alex Bates Consulting Limited | Leeds | 2004 |
| Alex Bell Ltd | London | 2024 |
| Alex Betti Limited | Cardiff | 2017 |
| Alex Blomeley Ltd | Croydon | 2018 |
| Alex Blondin Ltd | London | 2025 |
| Alex Bovey Consultancy Limited | Bristol | 2008 |
| Alex Bromley Consulting Ltd | London | 2018 |
| Alex Bruno Ltd | London | 2018 |
| Alex Carlton DEV Limited | Bristol | 2022 |
| Alex Clinical Intelligence Ltd | Oxford | 2025 |
| Alex Coleborn Ltd | Manchester | 2022 |
| Alex Corradi Consulting Limited | London | 2025 |
| Alex Covella Ltd | Thame | 2019 |
| Alex Craig Design Limited | Sturminster Newton | 2015 |
| Alex Creative Limited | London | 2026 |
| Alex Cretney Limited | Teddington | 2019 |
| Alex Currie-Clark Ltd | London | 2015 |
| Alex Damms Ltd. | Rickmansworth | 2015 |
| Alex Dias Photography & Web Limited | Coulsdon | 2010 |
| Alex Diaz Media Operator Limited | Street | 2013 |
| Alex Elliott Media Limited | Newcastle Under Lyme | 2021 |
| Alex Elmslie Limited | London | 2018 |
| Alex Evans Productions Ltd | Buckhurst Hill | 2023 |
| Alex Figini Creative Limited | Newport | 2022 |
| Alex Gale Automotive Ltd | Poole | 2025 |
| Alex Gale Digital Ltd | Horsham | 2023 |
| Alex Gore AG Limited | Durham | 2025 |
| Alex Graham Publishing Ltd | Newmarket | 2024 |
| Alex Harris Limited | Leicester | 2020 |
| Alex Hartley Broadcasting Ltd | Clitheroe | 2022 |
| Alex HAY Consulting Ltd | Manchester | 2016 |
| Alex Hazell Limited | Whitehills Business Park | 2010 |
| Alex Helsby Music Ltd | Harpenden | 2024 |
| Alex Hughes Technical Services Ltd | Steyning | 2026 |
| Alex Hulsey Ltd | London | 2017 |
| Alex Hunter Limited | Glasgow | 2020 |
| Alex J Brown Limited | Crowborough | 2013 |
| Alex J Mills Limited | Warrington | 2025 |
| Alex James Atkinson Ltd | Manchester | 2021 |
| Alex Johnson Software Limited | London | 1995 |
| Alex Johnson Technical Consulting Ltd | Evesham | 2022 |
| Alex Joyce Consulting Limited | Benfleet | 2023 |
| Alex Keyte Videography Ltd | Leeds | 2012 |
| Alex Khan Ltd | Slough | 2023 |
| Alex King Entertainment Limited | Southampton | 2025 |
| Alex Kingston Limited | Oxted | 2021 |
| Alex Kirby Editor Ltd | Crewkerne | 2018 |
| Alex L Consulting Ltd | Leicester | 2021 |
| Alex Lawrence Film Ltd | Cranfield | 2025 |
| Alex Layton Ltd | London | 2018 |
| Alex LEE Consulting Limited | Wimborne | 2018 |
| Alex LEE Ltd | Edinburgh | 2022 |
| Alex Leonard Edit Ltd | Rushden | 2017 |
| Alex Loring Ltd | London | 2008 |
| Alex M Kennison Media Limited | Market Drayton | 2015 |
| Alex Macdonald Limited | Wadhurst | 2007 |
| Alex Macleod Films Ltd | Hyde | 2017 |
| Alex Maher Books Ltd | Hook | 2022 |
| Alex Makes Games Ltd | London | 2026 |
| Alex Martinsmith Ltd | Kington | 2023 |
| Alex Mcdowell Limited | Slough | 2024 |
| Alex Media Ltd | Innerleithen | 2023 |
| Alex Media Technology Limited | Newcastle Upon Tyne | 2012 |
| Alex Metcalfe DOP Limited | Wantage | 2007 |
| Alex Mildenhall Lighting Limited | Halstead | 2012 |
| Alex Molyneux Ltd | Cuddington | 2018 |
| Alex Morrison Marketing Ltd | Stoke-On-Trent | 2024 |
| Alex Mucadum Limited | Twickenham | 2018 |
| Alex Muscar Software Limited | Bolton | 2026 |
| Alex Nail Publishing Ltd | Bath | 2023 |
| Alex Naish Ltd | Hockley | 2016 |
| Alex Nicholas Advisory Ltd | London | 2026 |
| Alex Noela Media Ltd | London | 2024 |
| Alex Olaniyi Oyedele Limited | Barking | 2018 |
| Alex Parkinson Ltd | Liverpool | 2013 |
| Alex Penfold Limited | Bedford | 2024 |
| Alex Playback Please Limited | Hassocks | 2025 |
| Alex Pollock Ltd. | Glasgow | 1994 |
| Alex Polo Ltd | London | 2019 |
| Alex Potter Films Ltd | Crewe | 2020 |
| Alex Priestley Talent Limited | Manchester | 2018 |
| Alex Prime Advert Ltd | Ilford | 2026 |
| Alex Production Ltd | London | 2023 |
| Alex Purkiss Sound Limited | Brighton | 2023 |
| Alex RAW Limited | Barnet | 2016 |
| Alex Reader Limited | Budleigh Salterton | 2023 |
| Alex REN Ltd | London | 2022 |
| Alex Reuben Kinema Ltd | London | 2019 |
| Alex Ritchie Limited | London | 2014 |
| Alex Rodin TV Services Ltd | Rotherham | 2023 |