| Airserve.Smc Limited | Construction | 2005 |
| Airtec Engineering Limited | Professional & scientific | 2012 |
| Airtel Communications Ltd | Information & communication | 2022 |
| Airtime Publishing Limited | Information & communication | 1990 |
| Airway Anaesthesia Services Ltd | Health & social care | 2022 |
| AIS Property Limited | Real estate | 1987 |
| Aisecured Limited | Wholesale & retail | 2021 |
| Aishwaran Ltd | Health & social care | 2016 |
| Aismith Ltd | Information & communication | 2024 |
| AIT Accountants Limited | Professional & scientific | 2003 |
| AIT Business Solutions Limited | Professional & scientific | 2017 |
| AJ Clinical Pharmaceutical Limited | Health & social care | 2024 |
| AJ Hospitality Limited | Hospitality | 2021 |
| AJA Business Consulting Limited | Professional & scientific | 2012 |
| AJA Healthcare Ltd | Manufacturing | 2021 |
| AJB Developing Ltd | Real estate | 2022 |
| AJB Tech Holdings Limited | Financial services | 2023 |
| AJG Builders Limited | Construction | 2018 |
| AJG Environmental Ltd | Administrative & support | 2014 |
| Ajkm Management Limited | Administrative & support | 2018 |
| AJP Transport Limited | Transport & logistics | 2022 |
| AJS Accounting Services Limited | Professional & scientific | 2017 |
| AJS Reporting Ltd | Professional & scientific | 2023 |
| Ajza Real Estate Limited | Real estate | 2024 |
| AK & AG Enterprises Ltd | Wholesale & retail | 2019 |
| AK Advisory Ltd | Financial services | 2011 |
| AK Engr Ltd | Construction | 2022 |
| AK Medics Health Limited | Health & social care | 2025 |
| AK Montara Ltd | Wholesale & retail | 2026 |
| AK Prescribing Services Ltd | Health & social care | 2021 |
| Ak&M Consulting Limited | Professional & scientific | 2018 |
| Akaal Logistics Limited | Transport & logistics | 2024 |
| Akala Beauty Ltd | Other services | 2020 |
| Akanksha and Aditya Medical Services Ltd | Information & communication | 2008 |
| Akas Partners Ltd | Financial services | 2022 |
| Akash Airborne Solutions Ltd | Manufacturing | 2026 |
| Akazai Ltd | Wholesale & retail | 2018 |
| Akbar Signature Homes Ltd | Construction | 2025 |
| Akbari Foods Limited | Hospitality | 2025 |
| AKD Asset Management Ltd | Real estate | 2019 |
| AKD Dental Ltd | Health & social care | 2018 |
| Akegata Ltd | Financial services | 2026 |
| Akel & Co Ltd | Real estate | 2024 |
| Akhis Limited | Professional & scientific | 2015 |
| Akilaram Ltd | Health & social care | 2026 |
| Akki Tech and Services Ltd | Information & communication | 2012 |
| AKM Hire Ltd | Other services | 2022 |
| Akmal Shah Limited | Professional & scientific | 2025 |
| AKN Asset Management Ltd | Real estate | 2026 |
| AKS Fire Safety Limited | Public administration | 2014 |
| Aksharpurushottam Properties Limited | Real estate | 2025 |
| Akstec Limited | Information & communication | 2012 |
| AKT Cars Limited | Wholesale & retail | 2018 |
| AL Auto Holding Limited | Wholesale & retail | 2024 |
| AL Bastaki Property Limited | Real estate | 2023 |
| AL Masood Consultancy Limited | Professional & scientific | 2024 |
| AL Medical Training Academy Ltd | Health & social care | 2025 |
| AL Mu'Minoon Partnership (AMP) Welfare Trust | Health & social care | 2019 |
| AL Noor Home Ltd | Wholesale & retail | 2023 |
| AL OUD Scents Limited | Manufacturing | 2021 |
| AL Waqas Freight Ltd | Transport & logistics | 2019 |
| Al-Adham Ltd | Education | 2026 |
| Al-Rahber | Health & social care | 2021 |
| Al-Rehman Holdings Ltd | Hospitality | 2021 |
| ALA Infinitylab Limited | Information & communication | 2017 |
| Alabdi Limited | Health & social care | 2015 |
| Alameda Investments (NO.34) Limited | Households | 1984 |
| Alan Taylor Flooring Consultancy Ltd | Wholesale & retail | 2020 |
| Alarm & Vision Limited | Administrative & support | 2003 |
| Alaynah's Boutique Limited | Manufacturing | 2017 |
| Alba Construction (Midlands) Limited | Construction | 2008 |
| Alba Homes Limited | Construction | 2022 |
| Albany Wood Management Company Limited | Households | 2022 |
| Albert Court Management Co Ltd | Households | 1996 |
| Albiecon Group Ltd | Construction | 2023 |
| Albiecon Holdings Ltd | Financial services | 2020 |
| Albion Contracts Ltd | Professional & scientific | 2021 |
| Albion Dayus Ltd | Real estate | 2017 |
| ALC Business Coaching Limited | Professional & scientific | 2024 |
| Alcester Motor Company Ltd | Wholesale & retail | 2021 |
| ALCHEMIST13 Solutions Ltd | Information & communication | 2025 |
| Alchemy CF Limited | Professional & scientific | 2009 |
| Aldanco Properties Ltd | Real estate | 2020 |
| Alderbrook Estates Limited | Real estate | 2019 |
| Alderbrook Management Services Limited | Households | 2017 |
| Alderbrook School | Education | 2011 |
| Alderbrook Spinney Management Company Limited | Households | 2000 |
| Aldermont Group Limited | Financial services | 2014 |
| Alderton Croft Limited | Real estate | 2024 |
| Alderwood Estate Agents Limited | Real estate | 2023 |
| Aldwyn Tower Management Company Limited | Households | 2009 |
| ALE Hub Franchising Limited | Hospitality | 2023 |
| ALE Hub Limited | Hospitality | 2019 |
| Aleezay Trading Limited | Wholesale & retail | 2024 |
| Alekseer Limited | Health & social care | 2022 |
| Aleph Estates Ltd | Real estate | 2025 |
| Aleph Medical Ltd | Health & social care | 2014 |
| Alesho Limited | Construction | 2017 |
| Aletech Innovations Limited | Wholesale & retail | 2026 |
| Alex Doffman Limited | Education | 2025 |