| Alex Belle Limited | London | 2005 |
| Alex Bellos Limited | London | 2008 |
| Alex Bennett Marketing Services Limited | East Grinstead | 2024 |
| Alex Bigham Consulting Ltd | London | 2018 |
| Alex Bingham Studio Ltd | London | 2025 |
| Alex Bloch BA Limited | London | 2020 |
| Alex Boddington Services Ltd | Street | 2024 |
| Alex Bosier Limited | London | 2026 |
| Alex Bramall Ltd | Pewsey | 2013 |
| Alex Brooks Services Limited | London | 2022 |
| Alex Brown Consultancy Ltd | Sheffield | 2022 |
| Alex Brown Real Estate Limited | Bexhill-On-Sea | 2013 |
| Alex Bryden Consulting Limited | Acklington Village | 2018 |
| Alex Buckland Photography Ltd | Eastbourne | 2024 |
| Alex Built IT Limited | Wolverhampton | 2018 |
| Alex Burton Design Ltd | Leeds | 2018 |
| Alex CAM Consulting Limited | London | 2006 |
| Alex Cameron Limited | Slough | 2010 |
| Alex Carson-Taylor Ltd | Broseley | 2009 |
| Alex Carvalho Ltd | London | 2014 |
| Alex Casado Limited | Bristol | 2022 |
| Alex Cesarsky Architects Ltd | Barnsley | 2018 |
| Alex Champion Design Ltd. | Torquay | 2012 |
| Alex Christian Limited | Derby | 2006 |
| Alex Clark Art Ltd | Hexham | 2006 |
| Alex Clark Designs Ltd | Carlisle | 2023 |
| Alex Clark Studio Limited | Cardiff | 2006 |
| Alex Cochrane Architects Limited | Witney | 2016 |
| Alex Collins Ltd | Stamford | 2025 |
| Alex Conner Creative Limited | Bromley | 2012 |
| Alex Cooper Photo Ltd | Chesterfield | 2023 |
| Alex Cotton Interiors Limited | London | 2013 |
| Alex Cousins Consulting Ltd | Liverpool | 2020 |
| Alex Cresswell Planning Consultancy Ltd | Wallingford | 2024 |
| Alex D Architects Limited | Marlow | 2014 |
| Alex D Mason PR Limited | Holmfirth | 2018 |
| Alex Dale Photography Ltd | Cardiff | 2023 |
| Alex Davis (UK) Ltd | Croydon | 2025 |
| Alex Davison Sports Agency Ltd | Bournemouth | 2018 |
| Alex Day Associates Limited | Colchester | 2022 |
| Alex Design Limited | Leigh On Sea | 2010 |
| Alex Devitt Marketing Limited | Thames Ditton | 2023 |
| Alex Dobbin Limited | London | 2013 |
| Alex Ebdon Art Limited | London | 2016 |
| Alex Edmans Consulting Limited | London | 2017 |
| Alex Ellis Design Limited | Dunstable | 2019 |
| Alex Engineering Consulting Ltd | Bournemouth | 2025 |
| Alex Estrella Ltd | London | 2023 |
| Alex Fergusson Architects Limited | Kingston Upon Thames | 2007 |
| Alex Ferrari Consultancy Limited | London | 2012 |
| Alex Ferry Foundation | London | 2018 |
| Alex Firth Consulting Limited | Baldock | 2006 |
| Alex Fisher (Foodservice Advisor) Ltd | Renfrew | 2014 |
| Alex Flanagan Management Ltd | Oldham | 2015 |
| Alex Foteinos Ltd | London | 2024 |
| Alex Freeman Photography Ltd | Ascot | 2015 |
| Alex French Associates Limited | Penarth | 2010 |
| Alex Garrett Ltd | Brighton | 2016 |
| Alex Gerrard Ltd | Sheffield | 2013 |
| Alex Goddard Limited | Sheffield | 2021 |
| Alex GOY Limited | Welwyn Garden City | 2018 |
| Alex Graphics Designer Limited | Cardiff | 2024 |
| Alex Gray Ltd | Chalfont St. Giles | 2026 |
| Alex Greaves Limited | Harrow | 2019 |
| Alex Greer Consulting Ltd | London | 2019 |
| Alex Griffiths Photography Ltd | Bath | 2017 |
| Alex Griffiths Services Ltd | Swanley | 2013 |
| Alex Group Consultancy Ltd | London | 2026 |
| Alex GUY Photography Limited | Southampton | 2010 |
| Alex Hall Engineering Limited | Ipswich | 2025 |
| Alex Halsey Limited | Towcester | 2018 |
| Alex Hamilton Consulting Ltd | Leicester | 2026 |
| Alex Harris Solutions Limited | Brighton | 2016 |
| Alex Harrison PR Ltd | London | 2025 |
| Alex Henry and Company GUN and Rifle Makers Limited | Dunkeld | 1998 |
| Alex Henry Ltd | Barking | 2026 |
| Alex Hickman SPV Ltd | Dudley | 2018 |
| Alex Hippisley-Cox PR Ltd | Guildford | 2012 |
| Alex Homfray Cultural Destinations Limited | London | 2018 |
| Alex House Limited | London | 2002 |
| Alex Howe Photography Limited | Northwood | 2013 |
| Alex Hudson Architectural Ltd | Broseley | 2020 |
| Alex Hunting Limited | Sheffield | 2015 |
| Alex Hutcheon and Company Limited | Aberdeen | 2021 |
| Alex James Law Ltd | Dudley | 2018 |
| Alex James Studio Ltd | Nottingham | 2025 |
| Alex Jeffery Ltd | St. Austell | 2024 |
| Alex John Limited | Liverpool | 2015 |
| Alex Johnson Design Ltd | London | 2023 |
| Alex Johnson Limited | London | 2006 |
| Alex Johnson Photographic Ltd | London | 2025 |
| Alex Joseph Design Limited | London | 2022 |
| Alex Joy Partnership Limited | Stoke On Trent | 2011 |
| Alex Kennedy Consultancy Limited | Bristol | 2024 |
| Alex Kerslake Photography Limited | Romsey | 2020 |
| Alex King Consulting Limited | Halesowen | 2016 |
| Alex Knott Equine Ltd | Stamford | 2024 |
| Alex Knowles Structural Design Ltd | Enniskillen | 2025 |
| Alex Kuhne & Company Ltd | Northampton | 2025 |
| Alex Lafferty Ltd | Glasgow | 2012 |