| Abdiaziz Mohamed Ltd | Construction | 2025 |
| Abdillahi Solar Limited | Construction | 2025 |
| Abdirahim Ltd | Health & social care | 2023 |
| Abdl Ltd | Real estate | 2026 |
| Abdul Aziz Hamid Ltd | Wholesale & retail | 2025 |
| Abdul Hafeez 006 Ltd | Wholesale & retail | 2025 |
| Abdul Reman & Sons Ltd | Professional & scientific | 2018 |
| Abdul Suleman Properties Ltd | Real estate | 2019 |
| Abdul Wahid & Sons Limited | Hospitality | 1996 |
| Abdulhalim (Leicester) Ltd | Real estate | 2016 |
| Abdulkadir Incorporation Ltd | Health & social care | 2020 |
| Abdullah Medicals Limited | Health & social care | 2022 |
| ABDULLAH2022 Ltd | Wholesale & retail | 2023 |
| Abdulrauf Ltd | Wholesale & retail | 2022 |
| ABE Solutions Ltd | Professional & scientific | 2020 |
| Abedshire Limited | Wholesale & retail | 2022 |
| Abee Cleaning Limited | Administrative & support | 2012 |
| Abel Group Limited | Financial services | 1984 |
| Abeo Music Ltd | Information & communication | 2025 |
| Aber Accounting Services Limited | Professional & scientific | 2015 |
| Aberdale Pharma Limited | Health & social care | 2025 |
| Aberdale Supermarket Ltd | Wholesale & retail | 2025 |
| Aberdeen House Property Limited | Real estate | 2011 |
| Aberford Traditional Ltd | Transport & logistics | 2014 |
| Abex Capital Holdings Ltd | Real estate | 2026 |
| Abex Trading Ltd | Wholesale & retail | 2026 |
| Abgruk Ltd | Other services | 2015 |
| ABH Traders Ltd | Wholesale & retail | 2023 |
| Abhinay Express Ltd | Wholesale & retail | 2015 |
| Abhir Ltd | Information & communication | 2025 |
| Abhirama Ltd | Agriculture & fishing | 2025 |
| Abhishek Ltd | Hospitality | 2026 |
| Abhishis Limited | Health & social care | 2025 |
| ABI 3 Ltd | Hospitality | 2018 |
| ABI 4 Ltd | Hospitality | 2019 |
| ABI 6 Ltd | Hospitality | 2020 |
| ABI Bliss Ltd | Manufacturing | 2025 |
| Abicrest Ltd | Manufacturing | 2013 |
| Abid Mart Limited | Wholesale & retail | 2025 |
| Abidgo Ltd | Wholesale & retail | 2025 |
| Abidos Medical Ltd | Health & social care | 2018 |
| Abidsamdani Taxi Ltd | Transport & logistics | 2024 |
| Ability Driving Academy Limited | Education | 1987 |
| Ability for ALL Limited | Education | 2016 |
| Abingdon King Dick Limited | Manufacturing | 2004 |
| Abiring Property Ltd | Real estate | 2026 |
| Abis Cleaning (Leicester) Ltd | Administrative & support | 2012 |
| Abis Cleaning Services Ltd | Administrative & support | 2009 |
| Abis Garden Services Ltd | Administrative & support | 2016 |
| Abis Management & Maintenance Ltd | Households | 2019 |
| Abis Mgmt and Maintenance Ltd | Construction | 2022 |
| Abis Services (Nottingham) Ltd | Administrative & support | 2013 |
| Abitaa Ltd | Wholesale & retail | 2020 |
| Abiti Ladieswear Ltd | Wholesale & retail | 2015 |
| Abitia Consulting Ltd | Information & communication | 2023 |
| ABJ & ST Construction Limited | Construction | 2013 |
| ABJ & ST Developments Limited | Construction | 2022 |
| ABK Capital Partners Limited | Financial services | 2024 |
| ABK London Ltd | Wholesale & retail | 2025 |
| ABK Optical Limited | Health & social care | 2014 |
| ABK Sols Ltd | Information & communication | 2025 |
| ABL Cars Ltd | Wholesale & retail | 2006 |
| Able 2 Access Ltd | Wholesale & retail | 2022 |
| Able Trades Group Ltd | Construction | 2026 |
| Ableable Limited | Health & social care | 2020 |
| ABM Implants Ltd | Professional & scientific | 2022 |
| ABM Joints Ltd | Health & social care | 2009 |
| Abmultiproducts Ltd | Wholesale & retail | 2010 |
| ABN Utilities Ltd | Professional & scientific | 2026 |
| Abnc Property Limited | Real estate | 2021 |
| Abney Hastings Limited | Education | 2018 |
| Abney Investments Ltd | Extraterritorial | 2023 |
| Abode Accounting Limited | Administrative & support | 2014 |
| Abode Carpentry Limited | Manufacturing | 2018 |
| Abode Lettings Leicester Ltd | Real estate | 2021 |
| Abode London Road Ltd | Construction | 2013 |
| Abode Nottingham Limited | Construction | 2015 |
| Abode Nugent Street Ltd | Construction | 2016 |
| Aboh Ltd | Financial services | 2026 |
| Abotts Ltd | Real estate | 2026 |
| Aboubacarr Ltd | Transport & logistics | 2022 |
| About Festivals Limited | Arts & recreation | 2024 |
| About PR Limited | Professional & scientific | 2023 |
| Above & Beyond Clothing Limited | Manufacturing | 2017 |
| Above and Beyond Careers Ltd | Education | 2021 |
| Above Care Ltd | Health & social care | 2024 |
| Aboveaverage Ltd | Transport & logistics | 2024 |
| ABP Enterprises Ltd | Wholesale & retail | 2023 |
| ABP EOT Trustee Limited | Administrative & support | 2025 |
| ABP Mortgage Solutions Ltd | Financial services | 2022 |
| ABR Home Investments Limited | Real estate | 2026 |
| ABR4 Ltd | Construction | 2025 |
| Abrar Consulting Limited | Administrative & support | 2009 |
| Abrico (1930) Limited | Hospitality | 2014 |
| Abrp Solutions Ltd | Health & social care | 2024 |
| ABS & AYM Limited | Real estate | 2018 |
| ABS Developments Limited | Real estate | 2020 |
| Absara Sameja Limited | Administrative & support | 2025 |
| Absintel Limited | Information & communication | 2005 |
| Absk Holdings Limited | Real estate | 2017 |