| ALP (Europe) Limited | Birmingham | 2000 |
| ALP Engineering & Consultancy Ltd | London | 2016 |
| ALP Equipment Ltd | Billinge | 2003 |
| ALP Fashions Ltd | London | 2019 |
| ALP Heating Ltd | Camberley | 2021 |
| ALP Jewellery Limited | Great Missenden | 2009 |
| ALP Machine Services Ltd | Leicester | 2008 |
| ALP Stone Ltd | London | 2018 |
| Alpa Foods Ltd | London | 2022 |
| Alpa Wall Print Ltd | Thetford | 2024 |
| Alpac Alloys Limited | Belper | 1989 |
| Alpac London Brands Ltd | Chatham | 2026 |
| Alpaca Fashion Company Limited | Dulverton | 2014 |
| Alpaca Real Ltd | London | 2025 |
| Alpacrafts Ltd | London | 2025 |
| Alpar Ltd | London | 2025 |
| Alparil Ltd | Reading | 2026 |
| Alpay Catering Limited | London | 2017 |
| Alpc Ltd | South Croydon | 2023 |
| Alpe Services Ltd | Bristol | 2002 |
| Alpeco Limited | Coventry | 1977 |
| Alpek Polyester UK Ltd | Redcar | 2009 |
| Alpen Gold Ltd | London | 2023 |
| Alpen Signs Limited | Leicester | 1986 |
| Alpen Touch Ltd | Feltham | 2025 |
| Alpenbury Precision Engineering Limited | Rotherham | 2007 |
| Alperton Locksmith Ltd | London | 2025 |
| Alpett Faire Ltd | London | 2025 |
| Alpex Pharma (UK) Limited | London | 2007 |
| Alph Enterprises Ltd | London | 2016 |
| Alph Limited | Derby | 2015 |
| Alph Services Ltd | Cardiff | 2025 |
| Alpha Automobiles Ltd | Storrington | 2010 |
| Alpha & Ace Holdings Ltd | Huntingdon | 2024 |
| Alpha 1 Sheet Metal & Laser Ltd | Manchester | 2021 |
| Alpha 3 Manufacturing Limited | Scunthorpe | 1972 |
| Alpha 311 Ltd | Aylesford | 2018 |
| Alpha 4 X 4 Joinery Limited | Harrold Bedford | 2004 |
| Alpha Adhesives and Sealants Limited | Stourport On Severn | 1987 |
| Alpha AIM Distribution Ltd | Harrow | 2024 |
| Alpha Air Fabrications Limited | Leicester | 2015 |
| Alpha Air Ventilation Supplies Limited | Leicester | 2013 |
| Alpha Aluminium Ltd | Maidenhead | 2003 |
| Alpha and JAM UK Limited | Hemel Hempstead | 2025 |
| Alpha Anodising UK Limited | Reading | 2008 |
| Alpha Auto Concepts Ltd | Holmfirth | 2023 |
| Alpha Aviation Engineering (Finmere) Ltd | Kettering | 2021 |
| Alpha Avionics Ltd | Lytham St Annes | 2024 |
| Alpha Bedrooms & Kitchens Ltd | Ashton-Under-Lyne | 2024 |
| Alpha Biopesticides Limited | Cambridge | 2011 |
| Alpha Blade Sharpening Ltd | Stokcton On Tees | 2019 |
| Alpha Blinds Limited | Rutland | 1979 |
| Alpha Brew Ltd | Southampton | 2025 |
| Alpha Brickwork NW Ltd | Manchester | 2026 |
| Alpha Building Solutions Limited | Rochdale | 2026 |
| Alpha Caminus Limited | Ruislip, | 2025 |
| Alpha Card Compact Media Limited | Ilkley | 2013 |
| Alpha Card Print Finishing Ltd | Leeds | 2022 |
| Alpha Carpentry & Conversions Ltd | Ferryhill | 2020 |
| Alpha Charlie Ltd | London | 2015 |
| Alpha Chase Engineering Services Limited | Walsingham | 2004 |
| Alpha Chemicals Limited | Cumbernauld | 1981 |
| Alpha Choice Construction Ltd | Wisbech | 2024 |
| Alpha Clothing Ltd | Leicester | 2017 |
| Alpha Coatings Limited | Sheerness | 2011 |
| Alpha Colour Printers Limited | Gloucester | 1985 |
| Alpha Colourprint Ltd | | 2005 |
| Alpha Colourprint Services Ltd | London | 2019 |
| Alpha Communications.Com Ltd | Berkeley | 2009 |
| Alpha Concrete Ltd | Lincoln | 2022 |
| Alpha Control Services Ltd | Bristol | 2002 |
| Alpha Control Systems Limited | High Peak | 1999 |
| Alpha Converting Equipment Limited | Bedford | 2000 |
| Alpha Corporate Branding Ltd | Smethwick | 2017 |
| Alpha Data Parallel Systems (Holdings) Limited | Edinburgh | 2012 |
| Alpha Data Parallel Systems Limited | Edinburgh | 1993 |
| Alpha Decal & Nameplate Company Ltd | Bristol | 2001 |
| Alpha Designs (NW) Ltd | Bury | 2019 |
| Alpha Designs Upholstery Limited | Bilston | 2008 |
| Alpha Dynamic Ventures Ltd | Chesterfield | 2018 |
| Alpha Ecology Limited | Wanlockhead | 2008 |
| Alpha Electric Gates Limited | Saltaire | 2015 |
| Alpha Electrical and Electronic Solutions Ltd | Port Talbot | 2017 |
| Alpha Electrical Contracts Ltd | Bathgate | 2018 |
| Alpha Electrical Division Ltd | London | 2018 |
| Alpha Electrical Systems Limited | Southampton | 1989 |
| Alpha Electrics Contracting Limited | Swansea | 2002 |
| Alpha Electrics Limited | Leicester | 1990 |
| Alpha Electroplaters Limited | S Yorkshire | 1986 |
| Alpha Engineering Holdings Ltd | Stoke-On-Trent | 2023 |
| Alpha Engineering Ltd | Hereford | 2025 |
| Alpha Engineering Solutions Limited | Stoke On Trent | 1997 |
| Alpha Engineering XL Limited | Aberdeen | 2023 |
| Alpha ESS UK Limited | Dursley | 2020 |
| Alpha Extraction Limited | Liversedge | 2003 |
| Alpha Fabrication (UK) Ltd | Bonnyrigg | 2010 |
| Alpha Fabrication Limited | Evesham | 2001 |
| Alpha Fasteners Limited | Brecon | 2022 |
| Alpha Fencing (Yorkshire) Ltd | Rotherham | 2019 |
| Alpha Fiber Food Ltd | Maidstone | 2026 |