| Alexander Hearn Group Limited | Financial services | 2021 |
| Alexander Housing Services Ltd | Real estate | 2021 |
| Alexander James Enterprises Group Ltd | Professional & scientific | 2024 |
| Alexander Maxwell Ltd | Real estate | 2022 |
| Alexandra Blue (Cotgrave) Ltd | Real estate | 2022 |
| Alexandra Blue (Skegness) Ltd | Real estate | 2021 |
| Alexandra Blue Ltd | Real estate | 2016 |
| Alexandra House (Leicester) Limited | Households | 1986 |
| Alexandra K. Limited | Professional & scientific | 2013 |
| Alexandra Leasing Ltd | Administrative & support | 2001 |
| Alexandra Road Apartments Limited | Real estate | 2022 |
| Alexandru-Stefan Bratu Ltd | Transport & logistics | 2026 |
| Alexbia Trans Ltd | Transport & logistics | 2017 |
| Alexdetailingcentre Ltd | Administrative & support | 2026 |
| Alexis Business Ltd | Manufacturing | 2019 |
| Alexville Limited | Real estate | 1995 |
| Alexy Limited | Transport & logistics | 2025 |
| Alfa ACL Limited | Financial services | 2015 |
| Alfa Chemists Limited | Wholesale & retail | 2000 |
| Alfa N Beeta Ltd | Wholesale & retail | 2022 |
| Alfa Nova Ltd | Wholesale & retail | 2022 |
| Alfa Pharmaceuticals Limited | Wholesale & retail | 2017 |
| Alfamet LP | | 2019 |
| Alfano Frameworks Limited | Manufacturing | 2025 |
| Alfaruk Ltd | Real estate | 2025 |
| Alfcomp Limited | Information & communication | 2011 |
| Alfeo Trans Ltd | Transport & logistics | 2018 |
| Alfred & Associates Ltd | Administrative & support | 2022 |
| Alfred Roberts Limited | Financial services | 1992 |
| Alfresco Rugs Ltd | Wholesale & retail | 2020 |
| Algeriano Grill Limited | Hospitality | 2019 |
| Algoraze Limited | Professional & scientific | 2025 |
| Algorithmx Limited | Information & communication | 2026 |
| Algorytme Ltd | Information & communication | 2023 |
| Algtronic Ltd | Professional & scientific | 2020 |
| Alhaayaat Ltd | Wholesale & retail | 2022 |
| Alhady Travel Ltd | Administrative & support | 2025 |
| ALHARAMINTERNATIONAL72 Ltd | Wholesale & retail | 2025 |
| Alhawshi Smart Deals Ltd | Wholesale & retail | 2026 |
| Alhela Limited | Professional & scientific | 2025 |
| Alhijab Collection Ltd | Wholesale & retail | 2026 |
| Alhimani Ltd | Professional & scientific | 2020 |
| ALI Akhtar Ltd | Administrative & support | 2024 |
| ALI Auto Services Ltd | Wholesale & retail | 2025 |
| ALI Bhai Halal Butcher Ltd | Wholesale & retail | 2019 |
| ALI Deveci Ltd | Construction | 2019 |
| ALI MD Limited | Hospitality | 2025 |
| ALI Property Portfolio Ltd | Real estate | 2022 |
| ALI Refrigeration Limited | Manufacturing | 2012 |
| ALI Steel & Fabrications Ltd | Manufacturing | 2020 |
| ALI Taxis Ltd | Transport & logistics | 2021 |
| ALI Tech & Logistics Ltd | Wholesale & retail | 2025 |
| ALI Textiles International Ltd | Wholesale & retail | 2020 |
| ALI Yawari Ltd | Wholesale & retail | 2025 |
| Ali's London Ltd | Wholesale & retail | 2025 |
| Ali-Mak Investments Limited | Real estate | 2019 |
| Alias Industries Limited | Manufacturing | 2017 |
| Alibaba Leicester Ltd | Hospitality | 2017 |
| Alibaba Pizza & Kebab Limited | Hospitality | 2021 |
| Alicante 96 Limited | Construction | 2015 |
| Alice Hawkins Community Projects C.I.C. | Hospitality | 2023 |
| Alice Johnstone Ltd | Professional & scientific | 2024 |
| Alice Quartz and Granite Ltd | Manufacturing | 2022 |
| Alien Concepts Limited | Hospitality | 1996 |
| Alif (UK) Limited | Real estate | 1994 |
| Alif Carpets and Furnishers Limited | Wholesale & retail | 2002 |
| Alif Catering Ltd | Hospitality | 2022 |
| Alif Convenience Store Ltd | Wholesale & retail | 2026 |
| Alif Grocers Ltd | Wholesale & retail | 2016 |
| Alif Holdings Ltd | Real estate | 2019 |
| Alif Moosajee Limited | Health & social care | 2010 |
| Alif Partnerships LLP | | 2023 |
| Alif Properties Ltd | Real estate | 2019 |
| Alif Wholesalers (Leicester) Ltd | Wholesale & retail | 2009 |
| Aligned Minds Psychology Ltd | Health & social care | 2025 |
| Alika Scents Ltd | Manufacturing | 2021 |
| Alina Home Cleaning Ltd | Construction | 2026 |
| Alino Catering Ltd | Hospitality | 2025 |
| Alino Entertainment Ltd | Hospitality | 2025 |
| Alino Ltd | Wholesale & retail | 2015 |
| Alino Property Limited | Real estate | 2025 |
| Alisco Projects Limited | Construction | 2019 |
| Alish Investments Ltd | Real estate | 2025 |
| Alisha Designer Limited | Wholesale & retail | 2019 |
| Alisha P Ltd | Education | 2022 |
| Alisha Property Developments Ltd | Construction | 2020 |
| Alishe' Limited | Health & social care | 2026 |
| Alison Clark Mortgage Services Ltd | Financial services | 2014 |
| Alison Lockyer Investments LLP | | 2026 |
| Alistair Johnson Limited | Arts & recreation | 2015 |
| Alita Creative Limited | Manufacturing | 2025 |
| Alita Logistics Ltd | Transport & logistics | 2023 |
| Aliya’S Elegance Limited | Wholesale & retail | 2025 |
| Alizaf Estates Limited | Real estate | 2025 |
| Alizart Consulting Ltd | Professional & scientific | 2020 |
| Alkamist International Ltd | Manufacturing | 2025 |
| Alkapra Limited | Wholesale & retail | 2025 |
| Alkhaleeli Ltd | Education | 2025 |
| Alkiak Blue Nile Ltd | Information & communication | 2015 |
| Alkonooz Academy Limited | Education | 2026 |