| Alex Formwork Ltd | Hemel Hempstead | 2019 |
| Alex Gardening Services Limited | London | 2019 |
| Alex GAS and Heating Ltd | Burnley | 2022 |
| Alex Golden Construction Limited | London | 2020 |
| Alex Grange Developments Limited | Sunderland | 2025 |
| Alex Groundwork Limited | Hayes | 2013 |
| Alex Group Design Ltd | London | 2026 |
| Alex Group Does Ltd | Mildenhall | 2025 |
| Alex Group Drylining Ltd | Ilford | 2026 |
| Alex Group Supply Ltd | Grays | 2022 |
| Alex Haddow Joiners Limited | Crossgates | 2009 |
| Alex Hearn Construction Limited | Cannock | 2021 |
| Alex Hillenbrand Painting, Decorating and Renovation Ltd | Taunton | 2015 |
| Alex Holbrow Electrical Limited | Macclesfield | 2015 |
| Alex Holliday Limited | Derbyshire | 2007 |
| Alex Hughes Joinery Ltd | Wigan | 2019 |
| Alex Igov Services Ltd | Reading | 2019 |
| Alex Insulation Ltd | Edgware | 2025 |
| Alex Interiors Ltd | Edgware | 2013 |
| Alex James Construction Ltd | Shifnal | 2022 |
| Alex James Tiling Specialists Limited | Newcastle Upon Tyne | 2018 |
| Alex Joinery Limited | Croydon | 2011 |
| Alex Jones Electrical Ltd | Stafford | 2025 |
| Alex Jones Home Renovations Limited | Marlow | 2025 |
| Alex Jones Renovations Limited | Wrexham | 2019 |
| Alex Junior Ltd | Carshalton | 2012 |
| Alex K Macdonald Ltd | Alexandria | 2023 |
| Alex Kaboye Ltd | Maidstone | 2016 |
| Alex Kitchens & Joinery Ltd | Northwich | 2021 |
| Alex Lauriston Industrial & Garage Doors Ltd | Lossiemouth | 2010 |
| Alex Leahey GAS Engineering Ltd | Liverpool | 2022 |
| Alex Limited Ltd | Harrow | 2020 |
| Alex Lloyd Commercial Ltd | Hailsham | 2015 |
| Alex Lloyd Developments Ltd | Hailsham | 2020 |
| Alex London Limited | Upminster | 2004 |
| Alex London Lofts Ltd | Romford | 2020 |
| Alex LUH Ltd | Edmonton | 2016 |
| Alex Lungu Limited | Aylesbury | 2024 |
| Alex Luxdeco Ltd | High Wycombe | 2021 |
| Alex Luxury Painters Ltd | London | 2022 |
| Alex Matei Ltd | London | 2020 |
| Alex Matheson (Plumbing & Heating) Limited | Stornoway | 2005 |
| Alex Matheson Electrical Ltd | Glasgow | 2022 |
| Alex Mcdonald Scaffolding Consultants Ltd | Stonehaven | 2019 |
| Alex Mcmaster Builders Ltd | Irvine | 2021 |
| Alex Merefield Heating and Plumbing Ltd | Shaftesbury | 2023 |
| Alex Milne Building Services Ltd | Turriff | 2023 |
| Alex Mirsaney Limited | Edgware | 2020 |
| Alex MM08 Ltd | Livingston | 2026 |
| Alex Moffat Business Services Ltd | Cupar | 2026 |
| Alex Moody Associates Limited | St. Albans | 2011 |
| Alex Muja Carpentry and Joinery Ltd | London | 2019 |
| Alex Murray (Construction) Limited | Isle Of Lewis | 2000 |
| Alex Nash Limited | East Grinstead | 2013 |
| Alex Neale Consulting Limited | London | 2025 |
| Alex Norman Flooring Limited | Bathgate | 2025 |
| Alex Owen Ltd | Liverpool | 2021 |
| Alex Owens Painting and Decorating Services Ltd | Swansea | 2026 |
| Alex P Construction Limited | Morden | 2019 |
| Alex Painting & Decorating Ltd | Dagenham | 2020 |
| Alex Paius Construct Limited | Hayes | 2025 |
| Alex Palmer Plumbing & Heating Limited | Lancaster | 2013 |
| Alex Partitions Ltd | London | 2024 |
| Alex Paving GW Ltd | London | 2020 |
| Alex Pearson Limited | Swadlincote | 2024 |
| Alex Pepes Limited | London | 2021 |
| Alex Perfect Fit Ltd | Romford | 2024 |
| Alex Pjetri Construction Ltd | Southend-On-Sea | 2022 |
| Alex Plastering Limited | London | 2011 |
| Alex Plumbing & Heating Ltd | Milton Keynes | 2023 |
| Alex Porter Electrical Limited | Lydney | 2020 |
| Alex Prestige Painting and Decorating Ltd | Greenford | 2025 |
| Alex Pro Construct Limited | Worcester | 2026 |
| Alex Professional Gardening Limited | Oldham | 2026 |
| Alex Projects Ltd | London | 2026 |
| Alex Projects MD Ltd | London | 2026 |
| Alex Quality Construct Ltd | London | 2021 |
| Alex Quality Ltd | Wednesbury | 2013 |
| Alex Rankin Electrical Limited | Bournemouth | 2024 |
| Alex Renovations & Landscaping Ltd | Croydon | 2026 |
| Alex Renovations Ltd | Kempston | 2021 |
| Alex Repair Ltd | Rushden | 2018 |
| Alex Richardson Bricklaying & Building Services Limited | Exmouth | 2024 |
| Alex Robertson Construction Services Ltd | Glasgow | 2015 |
| Alex Robson Heating and GAS Ltd | Houghton Le Spring | 2020 |
| Alex Roofing Ltd | Epping | 2025 |
| Alex Rosca Ltd | Edgware | 2022 |
| Alex Ross Stan Access Ltd | London | 2026 |
| Alex Russell GAS & Heating Ltd | Prestonpans | 2023 |
| Alex S500 Ltd | London | 2023 |
| Alex Sanz Construction and Maintenance Ltd | Chertsey | 2022 |
| Alex Scaffolding Ltd | Leatherhead | 2015 |
| Alex Services 4 YOU Ltd | Harrow | 2023 |
| Alex Shaw Ltd | Leek | 2022 |
| Alex Shopfitting Limited | Southampton | 2025 |
| Alex Solution Eagle Limited | Harrow | 2019 |
| Alex Stewart Limited | Stevenston | 2026 |
| Alex Strachan Electrical Services Limited | Fraserburgh | 1995 |
| Alex Symonds Electrical Limited | King'S Lynn | 2014 |
| Alex Taxi Ltd | Barnsley | 2018 |