| Aayd 26 Ltd | Education | 2026 |
| Aaydin UK Ltd | Manufacturing | 2023 |
| Aayid Trade Limited | Wholesale & retail | 2025 |
| Aayl Limited | Wholesale & retail | 2021 |
| Aaylex Group Ltd | Wholesale & retail | 2020 |
| Aaylia Ltd | Other services | 2014 |
| Aayna Couriers Ltd | Transport & logistics | 2025 |
| Aayna London Ltd | Other services | 2021 |
| Aayo UK Ltd | Wholesale & retail | 2021 |
| Aayokart Global Limited | Wholesale & retail | 2026 |
| Aayoo Ltd | Wholesale & retail | 2022 |
| Aayra Global Ltd | Real estate | 2021 |
| Aayu Senses Limited | Administrative & support | 2012 |
| Aayughan Limited | Information & communication | 2012 |
| Aayun Ltd | Real estate | 2023 |
| Aayush Limited | Wholesale & retail | 2003 |
| Aayush Online Ltd | Wholesale & retail | 2025 |
| AAZ Engineering Services Ltd | Professional & scientific | 2025 |
| AAZ Investments Limited | Real estate | 2014 |
| AAZ Property Maintenance Limited | Construction | 2024 |
| AAZ Solutions Limited | Professional & scientific | 2025 |
| AAZ Traders Ltd | Wholesale & retail | 2018 |
| AAZ Travel Limited | Wholesale & retail | 2023 |
| Aaza Developers Limited | Real estate | 2019 |
| Aaza Estate Agents Limited | Real estate | 2018 |
| Aaza Properties and Consultancy Ltd | Real estate | 2011 |
| Aaza Rent a Car Limited | Administrative & support | 2018 |
| Aazaan Ltd | Information & communication | 2020 |
| Aazim Ltd | Information & communication | 2023 |
| Aazira Ltd. | Wholesale & retail | 2015 |
| Aazure Group Limited | Extraterritorial | 2018 |
| Aazure PM2 Ltd | Other services | 2025 |
| Aazz Enterprises Ltd | Wholesale & retail | 2019 |
| Aazz Solutions Limited | Manufacturing | 2025 |
| Aazzur (Nominee 1) Limited | Financial services | 2017 |
| Aazzur Limited | Information & communication | 2017 |
| AB & Assoc. Ltd | Other services | 2025 |
| AB & Co Accountancy Ltd | Professional & scientific | 2026 |
| AB & Co Business Services Limited | Other services | 2022 |
| AB & Company Investments Ltd | Real estate | 2025 |
| AB & F Company Ltd | Construction | 2026 |
| AB & S Holdings Limited | Financial services | 2023 |
| AB & SD Education Ltd | Education | 2018 |
| AB & Services Limited | Other services | 2022 |
| AB (LDN) Construction Ltd | Construction | 2017 |
| AB 24 Car Glass Ltd | Wholesale & retail | 2022 |
| AB Accountants Ltd | Professional & scientific | 2019 |
| AB Accounting & Tax Consultants Ltd | Professional & scientific | 2019 |
| AB Advisors Limited | Professional & scientific | 2005 |
| AB Advisory Group Ltd | Professional & scientific | 2025 |
| AB Aesthetic Clinic Limited | Health & social care | 2025 |
| AB Aesthetics Academy Ltd | Other services | 2021 |
| AB Agile Consulting Ltd | Other services | 2016 |
| AB Agri Limited | Manufacturing | 1923 |
| AB Automated Ltd | Information & communication | 2025 |
| AB Avenue Limited | Real estate | 2020 |
| AB Awareness Ltd | Information & communication | 2021 |
| AB Bar Ltd | Hospitality | 2019 |
| AB Barbers Ltd | Other services | 2023 |
| AB Bermondsey Limited | Real estate | 2025 |
| AB Biotechnology Limited | Manufacturing | 2012 |
| AB Blaise Ltd | Wholesale & retail | 2023 |
| AB Blue Compass Ltd | Professional & scientific | 2025 |
| AB Books Ltd | Professional & scientific | 2024 |
| AB Boutique Hotels Ltd | Financial services | 2025 |
| AB Boutique Hotels Operations Ltd | Financial services | 2025 |
| AB Boutique Hotels Operations Selsdon Ltd | Financial services | 2026 |
| AB Box Ltd | Wholesale & retail | 2024 |
| AB Box Park 24 Ltd | Hospitality | 2025 |
| AB Box Park Ltd | Wholesale & retail | 2019 |
| AB Brand Ltd | Wholesale & retail | 2020 |
| AB Brokers LLP | | 2018 |
| AB Brothers Properties Ltd | Real estate | 2023 |
| AB Build Construction Ltd | Construction | 2024 |
| AB Building Maintenance Limited | Construction | 2021 |
| AB Bumps Ltd | Other services | 2019 |
| AB Business Advisory Ltd | Professional & scientific | 2026 |
| AB Business Assistance Limited | Professional & scientific | 2023 |
| AB Business Consultancy Limited | Professional & scientific | 2015 |
| AB Business Link Ltd | Extraterritorial | 2016 |
| AB Business Ltd | Wholesale & retail | 2025 |
| AB Business Services Ltd | Transport & logistics | 2020 |
| AB C MKT Ltd | Wholesale & retail | 2022 |
| AB C&E Ltd | Professional & scientific | 2021 |
| AB Cabinets Ltd | Manufacturing | 2024 |
| AB Canary Ltd | Wholesale & retail | 2022 |
| AB Capital Development Ltd | Real estate | 2025 |
| AB Capital Drive Ltd | Wholesale & retail | 2025 |
| AB Capital Group LLP | | 2024 |
| AB Capital Ltd | Professional & scientific | 2018 |
| AB Capital Partners Limited | Administrative & support | 2015 |
| AB Car Care Ltd | Wholesale & retail | 2023 |
| AB Carbon Composite Ltd | Manufacturing | 2025 |
| AB Card Ltd | Wholesale & retail | 2025 |
| AB Cardiology Limited | Health & social care | 2017 |
| AB Care Health Ltd | Wholesale & retail | 2025 |
| AB Care London Ltd | Health & social care | 2026 |
| AB Catering Equipment Limited | Hospitality | 2014 |
| AB Chancery Ltd | Hospitality | 2025 |
| AB Chauffeur Services Ltd | Transport & logistics | 2024 |