| ALC Estates (NW) Limited | Real estate | 2016 |
| ALC Holdings (NW) Limited | Real estate | 2010 |
| ALC Homes & Property Management Services Ltd | Real estate | 2023 |
| ALC Supported Living Ltd | Health & social care | 2022 |
| Alces Management Services Ltd | Professional & scientific | 2015 |
| Alchemic Kitchen CIC | Wholesale & retail | 2023 |
| Alchemist HSR and Restoration Services Ltd | Other services | 2021 |
| Alchemy Business Coaching Ltd | Professional & scientific | 2010 |
| Alchemy Central Ltd | Information & communication | 2022 |
| Alchemy Consultancy Services Limited | Professional & scientific | 2009 |
| Alchemy Group Ventures Limited | Professional & scientific | 2010 |
| Alchemy Records Ltd | Information & communication | 2022 |
| Alchemy Training Academy Limited | Education | 2010 |
| Alchemybot Limited | Professional & scientific | 2023 |
| Alcjk Estates Limited | Real estate | 2019 |
| Alcm (NW) Ltd | Health & social care | 2026 |
| Alcon Villas Ltd | Real estate | 2026 |
| Alcross Limited | Hospitality | 2022 |
| ALD Interiors Limited | Construction | 2018 |
| Alda Builders Ltd. | Households | 2025 |
| Aldan Electrical Engineering Ltd | Construction | 2023 |
| Aldeke Ltd | Households | 2024 |
| Alder Grange Estate Limited | Households | 2025 |
| Alder HEY Living Hospital Limited | Information & communication | 2017 |
| Alder HEY News Ltd | Wholesale & retail | 2017 |
| Alder HEY Promotions Ltd | Administrative & support | 2012 |
| Alder HEY Ventures Limited | Professional & scientific | 2017 |
| Alder Logistics Ltd | Transport & logistics | 2023 |
| Alder Medical Limited | Health & social care | 2022 |
| Alder Property Services Ltd | Real estate | 2024 |
| Alderaan Properties Limited | Real estate | 2018 |
| Alderforth Limited | Professional & scientific | 2025 |
| Alderley Road Development Ltd | Real estate | 2018 |
| Alderwood Builders Limited | Construction | 2021 |
| Alderwood Services Ltd | Other services | 2016 |
| ALE Tank Ltd | Hospitality | 2025 |
| Alec Hughes Limited | Financial services | 2022 |
| Alecs Transport Ltd | Transport & logistics | 2021 |
| Alectra Ltd | Construction | 2010 |
| Alegabserb Ltd | Information & communication | 2023 |
| Aleksandra Property Ltd | Real estate | 2024 |
| Alembic Foods Limited | Extraterritorial | 2004 |
| Alembic Products Limited | Professional & scientific | 1980 |
| Alena Ltd | Professional & scientific | 2014 |
| Alenna Properties Ltd | Administrative & support | 2025 |
| Aleo Plating Limited | Manufacturing | 1996 |
| Aleppo Fresh Food Ltd | Hospitality | 2025 |
| Aleppo Kitchen Ltd | Hospitality | 2025 |
| Alerta Coffee Limited | Hospitality | 2018 |
| Alesh International Ltd | Wholesale & retail | 2025 |
| Alesp Property Ltd | Real estate | 2023 |
| Alessandro Luca T/A My Home Rocks Ltd | Wholesale & retail | 2024 |
| Alex & Jane Adkins Trading Limited | Professional & scientific | 2016 |
| Alex Abram Properties Ltd | Extraterritorial | 2023 |
| Alex Cannon Ltd | Other services | 2016 |
| Alex Christopher Hair Ltd | Other services | 2021 |
| Alex Clarke & Sons Ltd | Construction | 2014 |
| Alex Cousins Consulting Ltd | Professional & scientific | 2020 |
| Alex Evan Heating and Plumbing Limited | Construction | 2022 |
| Alex Hamilton Tech Ltd | Manufacturing | 2024 |
| Alex Jaja Ltd | Health & social care | 2021 |
| Alex John Limited | Professional & scientific | 2015 |
| Alex Kebab Liverpool Ltd | Hospitality | 2024 |
| Alex Leahey GAS Engineering Ltd | Construction | 2022 |
| Alex Owen Ltd | Construction | 2021 |
| Alex Parkinson Ltd | Information & communication | 2013 |
| Alex Stewart Agriculture Limited | Extraterritorial | 1980 |
| Alex Sutton PR Ltd | Professional & scientific | 2020 |
| Alex Thuli Ltd | Health & social care | 2015 |
| Alex Trans Ltd | Transport & logistics | 2026 |
| Alex's Doggy Boutique Limited | Other services | 2019 |
| Alex.K&Son Ltd | Construction | 2024 |
| Alexander Anson Ltd | Construction | 2018 |
| Alexander Charles Developments Limited | Real estate | 2025 |
| Alexander Construction NW Ltd | Real estate | 2024 |
| Alexander Corporate Events Ltd | Arts & recreation | 2020 |
| Alexander Eden Care Management Ltd | Financial services | 2026 |
| Alexander Hotels Limited | Hospitality | 2003 |
| Alexander House Hotel Limited | Hospitality | 2002 |
| Alexander James Interiors Ltd | Wholesale & retail | 2023 |
| Alexander Mains Construction Services Limited | Wholesale & retail | 1987 |
| Alexander Myerson & Co Limited | Professional & scientific | 2013 |
| Alexander Properties (NW) Limited | Real estate | 2016 |
| Alexander Properties Limited | Real estate | 2004 |
| Alexander Property Group Ltd | Real estate | 2022 |
| Alexander Steel Limited | Water & waste | 2004 |
| Alexander Wharf Property Management Company Limited | Real estate | 2019 |
| Alexanders Tree & Landscapes Ltd | Administrative & support | 2025 |
| Alexanders' Pharmacy Ltd | Wholesale & retail | 2006 |
| Alexandra Drive RTM Company Limited | Households | 2012 |
| Alexandra Herring Trading Limited | Professional & scientific | 2018 |
| Alexandra Properties (NW) Limited | Construction | 2002 |
| Alexandra Road Development Limited | Construction | 2026 |
| Alexbabei Ltd | Transport & logistics | 2025 |
| Alexerin Management Limited | Arts & recreation | 2020 |
| Alexis Travel Limited | Transport & logistics | 2019 |
| Alexis Wilson Properties Limited | Real estate | 2000 |
| Alexs Kebab House Ltd | Hospitality | 2024 |
| Alexs Kebab HUT Ltd | Hospitality | 2026 |
| Alexsofi Ltd | Transport & logistics | 2017 |