| Alpha-Crete Ltd | Huddersfield | 2020 |
| Alpha-Cure Group Limited | Daventry | 2019 |
| Alpha-Cure Holdings Limited | Daventry | 2005 |
| Alpha-Cure Limited | Daventry | 1996 |
| Alpha-Rowen Limited | Tipton | 2009 |
| Alpha-Tech Fire Limited | Stroud | 2011 |
| ALPHA1000 Limited | Wigan | 2024 |
| ALPHA2DELTA Design Ltd | Hungerford | 2015 |
| ALPHA8076 Limited | Leicester | 2015 |
| Alphaatomic Ltd | Airdrie | 2020 |
| Alphabeeet Ltd | London | 2025 |
| Alphabelt Ltd | London | 2024 |
| Alphabet & Sign City Limited | Bognor Regis | 2009 |
| Alphabet Electronic Components Limited | Barnstaple | 1980 |
| Alphabet Print Limited | South Tottenham | 2018 |
| Alphabet Studios Ltd | Derby | 2025 |
| Alphabet-Zed Ltd | Shrewsbury | 2011 |
| Alphabetamini Ltd | Kilkeel | 2019 |
| Alphabettz Embroidery Ltd | Cwmbran | 2009 |
| Alphabond Technologies Limited | Northwich | 2014 |
| Alphacells Biotechnologies Limited | Sutton | 2019 |
| Alphacircle Engineering Limited | 64-68 Blackburn Street | 1982 |
| Alphacoole Refrigeration and Air-Conditioning Limited | London | 2017 |
| Alphadrive Engineering Services Limited | Birmingham | 2010 |
| Alphagen Ltd | Chesterfield | 2023 |
| Alphaglen Laboratories Limited | Crowborough | 1993 |
| Alphagraphic Inks Limited | Belfast | 1987 |
| Alphagy Limited | Worcester | 2017 |
| Alphahome Systems Limited | London | 2001 |
| Alphakon Limited | London | 2022 |
| Alphaled Lighting Limited | Preston | 2020 |
| Alphamation Limited | Stourbridge | 1982 |
| Alphamix Concrete and Screed Ltd | Lutterworth | 2019 |
| Alphapine Systems Ltd | Hornchurch | 2023 |
| Alphapower Ltd | Essington | 2016 |
| Alphapro Smartdial Ltd. | Wakefield | 2013 |
| Alpharenew Ltd | Manchester | 2024 |
| Alpharing Ltd | Aberdeen | 2025 |
| Alpharo Design Ltd | Bury St. Edmunds | 2025 |
| Alphasense Limited | Leicester | 1996 |
| Alphaset Limited | Northampton | 2014 |
| Alphasonics (Ultrasonic Cleaning Systems) Ltd. | Prescot | 1993 |
| Alphatec 2000 Group Ltd | Liverpool | 2022 |
| Alphatec Business Limited | London | 1994 |
| Alphatec Industries Ltd | Leeds | 2020 |
| Alphatech Print & Data Services Limited | Bolton | 2017 |
| Alphatemp Technology Limited | Braintree | 2006 |
| Alphateq Limited | Leamington Spa | 2003 |
| Alphatheta Emea Limited | London | 2014 |
| Alphatrim Limited | Sutton Coldfield | 2021 |
| Alphavictory Ltd | London | 2021 |
| Alphawave Golf UK Ltd | London | 2018 |
| Alphaweld Limited | Hope Valley | 1992 |
| Alphawood Furniture Ltd | Birkenhead | 2025 |
| Alphazero Parts Ltd | Rainham | 2019 |
| Alphd Ltd | London | 2025 |
| Alphera Medical Limited | Woodford Green | 2024 |
| Alpherantz Ltd | Cambridge | 1987 |
| Alphin Pans Limited | Oldham | 1993 |
| Alphin SAR Limited | Oldham | 2013 |
| Alphine Limited | Wembley | 2025 |
| Alphoria Limited | Paignton | 2023 |
| Alphr Technology Limited | Letchworth Garden City | 1994 |
| Alpi Engineering Ltd | Penrith | 2016 |
| Alpiine Traders Ltd | Crawley | 2026 |
| Alpin Nordic Investment Limited | Enfield | 2023 |
| Alpine Bodyshop Services Limited | Dorset | 1992 |
| Alpine Carpentry & Joinery Ltd | Ilminster | 2019 |
| Alpine Coast Life Ltd | London | 2017 |
| Alpine Crown (Europe) Limited | London | 2015 |
| Alpine D Ltd | Coventry | 2023 |
| Alpine Energy Ltd | Dorset | 2005 |
| Alpine Excalibur Refrigeration Ltd | Chalfont St. Giles | 2026 |
| Alpine Fabrication Services Limited | Lowestoft | 2003 |
| Alpine Frozen Desserts Limited | | 1994 |
| Alpine Glow Skincare Limited | Manchester | 2025 |
| Alpine Group (1974) Limited | Andover | 2008 |
| Alpine Group Investments Limited | Pinner | 2012 |
| Alpine Manufacturing Limited | Wigan | 2022 |
| Alpine Metal Tech UK Limited | Burton-On-Trent | 1970 |
| Alpine Park Homes Ltd | Bristol | 2021 |
| Alpine Plant Ltd. | Larkhall | 2014 |
| Alpine Security Systems Limited | Wilmslow | 2015 |
| Alpine Soft Drinks (U.K.) Limited | Leeds | 1950 |
| Alpine Tools Limited | Progress Road | 1965 |
| Alpine Windows Limited | Shildon | 2015 |
| Alpineboy Ltd | Oldham | 2017 |
| Alpineering Ltd | Gwynedd | 2013 |
| Alpino Designs Limited | London | 2014 |
| Alpino Samples Ltd | London | 2025 |
| Alpio Cosmetics Limited | Stoke-On-Trent | 2021 |
| Alpitronic UK Ltd | Preston | 2023 |
| Alpla UK Limited | Warrington | 1990 |
| Alplas Limited | Basildon | 1965 |
| Alpmar Ltd | London | 2023 |
| Alport Joinery & Bespoke Cabinetry Ltd | Derby | 2025 |
| Alpress Hydraulic Services Ltd. | Glasgow | 2010 |
| Alpro (UK) Limited | Kettering | 1999 |
| Alprofil Limited | Lancing | 1998 |
| Alps Biosciences Limited | Hounslow | 2017 |