| Alandale Avenue (Management Company) Limited | Real estate | 2017 |
| Alandale Court Management Limited | Real estate | 1968 |
| Alandale Partnerships Limited | Professional & scientific | 2003 |
| Alani Property Ltd | Wholesale & retail | 2013 |
| Alannah Tandy Pilbrow Ltd | Information & communication | 2025 |
| Alara J Ltd | Public administration | 2026 |
| Alaskan Ice Coventry Ltd | Hospitality | 2019 |
| Alavanderaert Limited | Information & communication | 2023 |
| Albahus Engineering Ltd. | Manufacturing | 2020 |
| Albany Cycles Limited | Wholesale & retail | 2013 |
| Albany Eats Limited | Hospitality | 2024 |
| Albany Management (Leamington Spa) Limited | Administrative & support | 1995 |
| Albany Productions Limited | Arts & recreation | 2019 |
| Albemarle Premier Finance Limited | | 1989 |
| Alberni Professional Services Ltd | Professional & scientific | 2018 |
| Albert & Co Estates Ltd | Financial services | 2022 |
| Albert & MAE Wealth Management Limited | Professional & scientific | 2024 |
| Albert 95 Ltd | Hospitality | 2021 |
| Albert Court Freehold Ltd | Real estate | 2025 |
| Albert Rian Properties Limited | Real estate | 1999 |
| Alberto's Limited | Hospitality | 2020 |
| Albertstein PUB Ltd | Hospitality | 2025 |
| Albright Engineering Limited | Financial services | 2004 |
| Albry Properties Ltd | Real estate | 2023 |
| Albu Transport Ltd | Transport & logistics | 2025 |
| ALC Electrical Services Ltd | Manufacturing | 2015 |
| Alcester Commercial Limited | Construction | 2024 |
| Alchemy Pharmaceuticals Ltd | Wholesale & retail | 2010 |
| Alcott Holdings Ltd | Wholesale & retail | 2021 |
| ALD Entertainment Ltd Ltd | Hospitality | 2026 |
| Alder Blue Limited | Information & communication | 2018 |
| Aldermere Collective Ltd | Health & social care | 2026 |
| Aldermoor Convenience Store Ltd | Wholesale & retail | 2023 |
| Aldridge Estates Ltd | Real estate | 2022 |
| Aldridge Management Solutions Limited | Professional & scientific | 2014 |
| Aldridge Trading Ltd | Hospitality | 2019 |
| ALE Construction Limited | Construction | 1998 |
| ALE Piling Ltd | Construction | 2005 |
| Ale&Ionut Ltd | Transport & logistics | 2025 |
| Aleap Knowledge Services Ltd | Education | 2017 |
| Alec Roberts Music Limited | Information & communication | 2026 |
| Aledo Transport Ltd | Transport & logistics | 2018 |
| Aleks & Elena Ltd | Transport & logistics | 2013 |
| Aleks Building Ltd | Construction | 2022 |
| Aleks Building Renovations Ltd | Real estate | 2025 |
| Aleksandra Dwojacka Ltd | Administrative & support | 2017 |
| Alemseged Travel Agent Limited | Administrative & support | 2024 |
| Alep Management Ltd | Administrative & support | 2026 |
| Alera Wellness and Cosmetics Clinic Ltd | Health & social care | 2025 |
| Alert One Properties Ltd | Real estate | 2018 |
| Alert Total Control Limited | Administrative & support | 2010 |
| Ales Building Ltd | Construction | 2020 |
| Alesia Transport Ltd | Transport & logistics | 2015 |
| Aless Landscaping & Co Ltd | Administrative & support | 2025 |
| Alessio Transport Ltd | Transport & logistics | 2026 |
| Alex & Ella Ltd | Administrative & support | 2019 |
| Alex Bell (Dental Supplies) Limited | Professional & scientific | 1983 |
| Alex DDB Ltd | Transport & logistics | 2019 |
| Alex Detailing Auto Ltd | Wholesale & retail | 2022 |
| Alex Ekspress Limited | Wholesale & retail | 2016 |
| Alex GEO Trans Ltd | Transport & logistics | 2013 |
| Alex Gordon Limited | Wholesale & retail | 2024 |
| Alex MAN Transport Limited | Transport & logistics | 2024 |
| Alex Oana Trans Ltd | Transport & logistics | 2017 |
| Alex Private Ltd Ltd | Wholesale & retail | 2026 |
| Alex UCV Limited | Transport & logistics | 2020 |
| Alexander Moss Limited | Financial services | 2015 |
| Alexander Zane Developments Limited | Real estate | 2016 |
| Alexander Zane Limited | Real estate | 2016 |
| Alexander Zane Projects Ltd | Construction | 2009 |
| Alexandra Care at Home Ltd | Health & social care | 2026 |
| Alexandra Court (Coventry) RTM Company Limited | Households | 2024 |
| Alexandra House Care Limited | Extraterritorial | 2024 |
| Alexandra House Property Limited | Financial services | 2022 |
| Alexandra Mews Management (Coventry) Ltd | Construction | 2011 |
| Alexandra Wellbeing C.I.C. | Education | 2026 |
| Alexandru Concoli Driving Ltd | Transport & logistics | 2016 |
| Alexandru Hulea Transport Limited | Manufacturing | 2025 |
| Alexandru Mugurel Ltd | Transport & logistics | 2022 |
| Alexandru Transport Ltd | Transport & logistics | 2015 |
| Alexbirzan Ltd | Transport & logistics | 2016 |
| Alexemm Limited | Health & social care | 2014 |
| Alexey Media Ltd | Information & communication | 2025 |
| Alexi Promotions Limited | Administrative & support | 2006 |
| Alexina Consulting Ltd | Professional & scientific | 2016 |
| ALEXINO25 Limited | Wholesale & retail | 2025 |
| Alexneagoe Ltd | Construction | 2024 |
| Alexsal Ltd | Transport & logistics | 2018 |
| Alexya Transport Ltd | Transport & logistics | 2020 |
| Alfa Industries Ltd | Information & communication | 2018 |
| Alfa Laval Ultrasonics UK Limited | Manufacturing | 2009 |
| ALFA8 Technologies Ltd | Information & communication | 2023 |
| Alfacom Limited | Information & communication | 1999 |
| Alfall Ltd | Administrative & support | 2013 |
| Alfarah International Ltd | Wholesale & retail | 2024 |
| Alfirdaws Madrasa Ltd | Education | 2025 |
| Alflex Machines Limited | Other services | 2018 |
| Alfred Dzadey Engineering Limited | Administrative & support | 2015 |
| Alfreton Tool & Plant Hire Limited | Administrative & support | 2025 |
| Alfy Ltd | Wholesale & retail | 2026 |