| Aloom Alshai Co Ltd | Wholesale & retail | 2025 |
| Alopias Consulting Limited | Professional & scientific | 2013 |
| Alora London Ltd | Wholesale & retail | 2025 |
| Aloras Mining Ltd | Information & communication | 2025 |
| Alore Hydration Limited | Manufacturing | 2024 |
| Alorica UK Limited | Administrative & support | 2017 |
| Alostora Seafood Ltd | Manufacturing | 2023 |
| Alott Limited | Other services | 2020 |
| ALP Brain Training Centre Limited | Education | 2020 |
| ALP Marketing Ltd | Professional & scientific | 2026 |
| Alpha & Alpha Global Holdings Ltd | Other services | 2021 |
| Alpha 1 Investment & Cargo Services Limited | Transport & logistics | 2009 |
| Alpha 1 Sheet Metal & Laser Ltd | Manufacturing | 2021 |
| Alpha 1 Telecoms Ltd | Information & communication | 2026 |
| Alpha 100 Ltd | Administrative & support | 2019 |
| Alpha 360 Digital Ltd | Information & communication | 2010 |
| Alpha Branding Consultancy International Ltd | Professional & scientific | 2019 |
| Alpha Brick Cleaning Ltd | Construction | 2025 |
| Alpha Brickwork NW Ltd | Manufacturing | 2026 |
| Alpha Bubbles Ltd | Wholesale & retail | 2021 |
| Alpha Businesses Emea Ltd | Wholesale & retail | 2023 |
| Alpha Care PVT Ltd | Health & social care | 2016 |
| Alpha Cart Ltd | Wholesale & retail | 2020 |
| Alpha Ceilings and Partitions Ltd | Construction | 2019 |
| Alpha Corporate Solutions Limited | Administrative & support | 2024 |
| Alpha Dart Limited | Other services | 2024 |
| Alpha Digi Ltd | Wholesale & retail | 2018 |
| Alpha Fast Foods Ltd | Hospitality | 2021 |
| Alpha Flex Solutions Limited | Administrative & support | 2023 |
| Alpha Flight Group Limited | Professional & scientific | 1994 |
| Alpha for Investment & Trading Ltd | Extraterritorial | 2026 |
| Alpha for Investment Limited | Extraterritorial | 2026 |
| Alpha for Trading & Services Limited | Extraterritorial | 2026 |
| Alpha Garages Ltd | Wholesale & retail | 2013 |
| Alpha Global Hub Ltd | Wholesale & retail | 2025 |
| Alpha Great Ltd | Real estate | 2024 |
| Alpha Group-Uk Ltd | Transport & logistics | 2022 |
| Alpha Heating Solutions Limited | Construction | 2015 |
| Alpha Holiday Lettings Limited | Information & communication | 2010 |
| Alpha Horizon Traders Limited | Wholesale & retail | 2026 |
| Alpha HR Solutions Ltd | Professional & scientific | 2026 |
| Alpha HRD Solutions UK Limited | Professional & scientific | 1996 |
| Alpha Immo Pro Ltd | Administrative & support | 2017 |
| Alpha Investment Property Limited | Real estate | 2017 |
| Alpha IT Consultants Limited | Information & communication | 2025 |
| Alpha Languages Ltd | Professional & scientific | 2023 |
| Alpha Leisure Amusements Ltd | Arts & recreation | 2012 |
| Alpha Logistics Services Limited | Real estate | 2022 |
| Alpha Main East Ltd | Professional & scientific | 2023 |
| Alpha Male Limited | Administrative & support | 2006 |
| Alpha MCR Properties Limited | Real estate | 2022 |
| Alpha Mobility (2000) Ltd | Wholesale & retail | 2011 |
| Alpha Neuron Ltd | Extraterritorial | 2025 |
| Alpha Nikolli Management Ltd | Administrative & support | 2025 |
| Alpha Noble Limited | Professional & scientific | 2019 |
| Alpha Omega SFX Limited | Information & communication | 2018 |
| Alpha Omega Solutions Limited | Construction | 2013 |
| Alpha Partners Solutions Private Limited | Administrative & support | 2023 |
| Alpha Plast Ltd | Manufacturing | 2024 |
| Alpha Port Logistics Ltd | Transport & logistics | 2024 |
| Alpha Property Management Group Ltd | Real estate | 2024 |
| Alpha Reliability Ltd | Professional & scientific | 2023 |
| Alpha Remaps Ltd | Wholesale & retail | 2026 |
| Alpha Republic Ltd | Administrative & support | 2014 |
| Alpha Romeo Projects Limited | Real estate | 2024 |
| Alpha Safety & Services Ltd | Other services | 2025 |
| Alpha Sheet Metal & Laser Ltd | Manufacturing | 2011 |
| Alpha Sign Systems Limited | Manufacturing | 2007 |
| Alpha Spring Water Ltd | Water & waste | 2024 |
| Alpha Supplies Ltd | Wholesale & retail | 2025 |
| Alpha Supplies Today Limited | Wholesale & retail | 2025 |
| Alpha Swift Services Ltd | Construction | 2026 |
| Alpha TAU Engineering Ltd | Professional & scientific | 2022 |
| Alpha Technician's Ltd | Manufacturing | 2024 |
| Alpha Together Ltd | Real estate | 2024 |
| Alpha Trader SMA Limited | Wholesale & retail | 2026 |
| Alpha TV Ltd | Information & communication | 2017 |
| Alpha U Limited | Professional & scientific | 2023 |
| Alpha Vision 21 Ltd | Construction | 2021 |
| Alpha Wise Group Ltd | Real estate | 2024 |
| Alpha Wraps Ltd | Wholesale & retail | 2020 |
| Alpha Xray Aviation Ltd | Administrative & support | 2016 |
| Alpha Zone Ltd | Administrative & support | 2016 |
| Alpha-Academy Aesthetics Ltd | Education | 2019 |
| ALPHA2 Food Ltd | Hospitality | 2025 |
| ALPHA2020 Ltd | Financial services | 2020 |
| Alphabet Design Agency Ltd. | Professional & scientific | 2016 |
| Alphabet Holdings Ltd | Extraterritorial | 2015 |
| Alphabet Management Group Limited | Real estate | 2020 |
| Alphabusiness Limited | | 1983 |
| Alphacare NW Domiciliary and Support Services Ltd | Health & social care | 2016 |
| Alphacron Ltd | Professional & scientific | 2012 |
| Alphador Claims UK Ltd | Other services | 2018 |
| Alphageek Ltd | Information & communication | 2025 |
| Alphalead Solutions Ltd | Information & communication | 2025 |
| Alphaluxe Cleaners Ltd | Administrative & support | 2025 |
| Alphamarine Photography Limited | Professional & scientific | 2017 |
| Alphamed Anesthetics Limited | Health & social care | 2024 |
| Alphamoto Limited | Wholesale & retail | 2020 |
| Alphan Planning & Design Ltd | Construction | 2024 |