| Alowo.Cloud Ltd | South Ockendon | 2019 |
| Aloye Computer Enterprises Ltd | London | 2023 |
| Aloyp Limited | Glasgow | 2024 |
| Aloysius Productions Ltd | Liverpool | 2024 |
| ALP Agency Limited | Liverpool | 2026 |
| ALP Coding Limited | London | 2022 |
| ALP Consulting Limited | Hadleigh | 2025 |
| ALP Entertainments Ltd | Sheffield | 2023 |
| ALP Technology Limited | Lymington | 2025 |
| Alpa Technology Ltd | Coventry | 2010 |
| Alpaca Communications Limited | Ottery St. Mary | 2015 |
| Alpaca Digital Limited | London | 2020 |
| Alpaca Global Solutions Limited | Epping | 2022 |
| Alpaca International Ltd | Mildenhall | 2020 |
| Alpaca Investment Holdings Ltd | London | 2022 |
| Alpaca Software Ltd | London | 2021 |
| Alpacap Limited | London | 2024 |
| Alpaho International Ltd | Doncaster | 2025 |
| Alpaka Core Technologies Ltd | London | 2026 |
| Alpaka Ltd | Northampton | 2016 |
| Alpake Entertainment Ltd | Bathgate | 2023 |
| Alpamayo Technologies Limited | London | 2022 |
| Alpanagnana and Sons Limited | Dartford | 2011 |
| Alpas Holdings Ltd | London | 2019 |
| Alpas Pro Ltd | Tadcaster | 2024 |
| Alpas Software Ltd | London | 2024 |
| Alpat Systems Ltd | Belper | 2006 |
| Alpct Limited | Edinburgh | 2013 |
| Alpe Consulting Ltd | Nottingham | 2023 |
| Alpega TMS UK Ltd | Altrincham | 2025 |
| Alpel Consulting Ltd | Leicester | 2021 |
| Alpenglow Films Limited | Edinburgh | 2025 |
| Alpenglow Ltd | London | 2017 |
| Alpenite Ltd | London | 2017 |
| Alpenmind Limited | Bromley | 2023 |
| Alper Mobile Software Limited | London | 2018 |
| Alpera Limited | Tunbridge Wells | 2016 |
| Alpermis Ltd | London | 2025 |
| Alperton Clark Ltd | Bristol | 2024 |
| Alpesh Rabadia Photography Ltd | London | 2011 |
| ALPH4 Limited | Sheffield | 2019 |
| Alpha & Omega Consulting Ltd | London | 2018 |
| Alpha 1 Telecoms Ltd | Manchester | 2026 |
| Alpha 360 Digital Ltd | Manchester | 2010 |
| Alpha 5 Consulting Ltd | Aylesbury | 2026 |
| Alpha 56 Solutions Ltd | Hereford | 2020 |
| Alpha 8 Ltd | Bagshot | 2024 |
| Alpha 8 Ventures Ltd | London | 2021 |
| Alpha Accountancy Birmingham Ltd | Birmingham | 2023 |
| Alpha Accounting & Analytics Consultancy Ltd | London | 2016 |
| Alpha Advanced Technologies Ltd | London | 2025 |
| Alpha Advisories Ltd. | Darwen | 2023 |
| Alpha Advisory Ltd | Harrow | 2007 |
| Alpha Aerial Services Limited | Reading | 2004 |
| Alpha Aerials Limited | Fareham | 2016 |
| Alpha Agentic Intelligence Ltd | London | 2025 |
| Alpha AI Limited | London | 2022 |
| Alpha Ailabs Limited | London | 2025 |
| Alpha and Omega International Church Limited | Bridgend | 2020 |
| Alpha and Omega Publishers Limited | London | 2025 |
| Alpha Ariel Solutions Limited | Bristol | 2014 |
| Alpha Baby UK Limited | London | 2024 |
| Alpha Baron Ltd | London | 2025 |
| Alpha Base OS Ltd | London | 2025 |
| Alpha Base Research Ltd | London | 2021 |
| Alpha Beat Limited | Nottingham | 2023 |
| Alpha Beta Gamma Ltd. | Greenford | 2019 |
| Alpha Beta Management Limited | Stanmore | 2001 |
| Alpha Beta Technologies Ltd | London | 2022 |
| Alpha Block Capital Limited | Droitwich | 2021 |
| Alpha Brains IT Ltd | London | 2026 |
| Alpha Bravo 999 Limited | Swansea | 2021 |
| Alpha Bravo Charlie Ltd | Glasgow | 2014 |
| Alpha Bravo Creative Drinks Limited | York | 2026 |
| Alpha Bravo Studios Ltd | London | 2019 |
| Alpha Bridge International Ltd | Basingstoke | 2024 |
| Alpha Broadcast Limited | Macclesfield | 2021 |
| Alpha Broadcasting Corporation Ltd | London | 2018 |
| Alpha Business Communications Ltd | Stoke-On-Trent | 1999 |
| Alpha Business Solutions Ltd | Hull | 2018 |
| Alpha Business Support & IT Solutions Ltd | London | 2019 |
| Alpha Business Systems Ltd | Broadstairs | 2013 |
| Alpha Camera Crews Ltd | Neath | 2017 |
| Alpha Capital Group Limited | Harpenden | 2021 |
| Alpha Capital Management Ltd | Edinburgh | 2016 |
| Alpha Cars AI Ltd | London | 2026 |
| Alpha Centauri Limited | Kington | 2011 |
| Alpha Centauri Technologies and Media Solutions Ltd | Southsea | 2020 |
| Alpha Central Limited | Rode | 2023 |
| Alpha Chain Labs Ltd | London | 2020 |
| Alpha Clarity Ltd | London | 2025 |
| Alpha Cogs Ltd | Chigwell | 2019 |
| Alpha Communication Limited | Newcastle Upon Tyne | 1987 |
| Alpha Communications (Ireland) Limited | Holywood | 2001 |
| Alpha Company & Service Limited | London | 2026 |
| Alpha Computing (UK) Ltd | Alton | 1996 |
| Alpha Connectivity Ltd | Brentwood | 2020 |
| Alpha Consultancy AS Ltd | Aberdeen | 2025 |
| Alpha Consultancy Services Limited | Liverpool | 2025 |
| Alpha Consulting and Management Limited | London | 2024 |