| Advisor Link Ltd | Professional & scientific | 2024 |
| AFC AEC Services Limited | Professional & scientific | 2025 |
| Affinity PA Services Ltd | Administrative & support | 2016 |
| Afri Bloom Global Ltd | Wholesale & retail | 2025 |
| Afzal NAZ Limited | Health & social care | 2023 |
| Agal Building Ltd | Construction | 2024 |
| Ager 90 Ltd | Construction | 2021 |
| Agilan Limited | Real estate | 2025 |
| AGS Parties Ltd | Arts & recreation | 2022 |
| Ai.Help Limited | Professional & scientific | 2026 |
| Air Tight Ventilation Limited | Construction | 2018 |
| AJ Commercial (Welling) Limited | Real estate | 2025 |
| AJ Properties Capital Limited | Real estate | 2017 |
| AJD Plumbing Services Limited | Construction | 2021 |
| AJM Business Development Limited | Professional & scientific | 2021 |
| Ajr(Uk) Limited | Real estate | 2014 |
| AK Bricks Ltd | Information & communication | 2019 |
| Akaal Heritage Ltd | Arts & recreation | 2026 |
| Akin 1 Limited | Extraterritorial | 2020 |
| Akkorn Care Management Limited | Information & communication | 2019 |
| AKS Brands Limited | Wholesale & retail | 2017 |
| AL Shaheen AL Arabi for Trade Ltd | Wholesale & retail | 2025 |
| Al-Tawafuq Al-Mumayaz Line Trading and Investment Ltd | Wholesale & retail | 2025 |
| Alekta Ltd | Water & waste | 2022 |
| Alethea Grange Ltd | Real estate | 2025 |
| Alex Wolfe Ltd | Wholesale & retail | 2022 |
| Alexander Property Consulting Limited | Real estate | 2022 |
| Alfa Purity Tech Ltd | Manufacturing | 2025 |
| Alforge Properties and Building Ltd | Construction | 2021 |
| Aligned Services Limited | Construction | 2024 |
| Aljouma and Alhasoun Construction Equipment and Machinery Trading Co. Ltd | Wholesale & retail | 2025 |
| ALL Pro Security Ltd | Administrative & support | 2018 |
| ALL Purpose Electrical Ltd | Construction | 2019 |
| ALL Weld Fabrications Ltd | Manufacturing | 2020 |
| Allatini Limited | Wholesale & retail | 2024 |
| Alltype Refurbishments Ltd | Construction | 2025 |
| Allureco Ltd | Administrative & support | 2022 |
| Allureiq Ltd | Information & communication | 2025 |
| Almex Foreign Trade & Consulting Ltd. | Administrative & support | 2017 |
| Almip Ltd | Construction | 2019 |
| Alnours Group Ltd | Manufacturing | 2025 |
| Alpha Consulting Holdings Limited | Information & communication | 2006 |
| Alpha Globe Ltd | Health & social care | 2023 |
| Alpha Staffing Limited | Administrative & support | 2026 |
| Alterna Healthcare Limited | Health & social care | 2005 |
| Alvari Properties Limited | Real estate | 2021 |
| Amazing Blitz Clean Services Limited | Other services | 2022 |
| Ambients Inc Ltd | Wholesale & retail | 2026 |
| AMD Groundwork Ltd | Construction | 2024 |
| Aminmin Ltd | Hospitality | 2023 |
| Amirthaam Catering Ltd | Hospitality | 2016 |
| Amit Khilan Gandhi Ltd | Extraterritorial | 2024 |
| Amsmil Ltd | Construction | 2023 |
| AMT Land Limited | Real estate | 2026 |
| Amtt Services Ltd | Manufacturing | 2024 |
| AMU Tyre Centre Ltd | Wholesale & retail | 2025 |
| Anabia Private Ltd | Wholesale & retail | 2026 |
| Anambra State Union UK and Ireland Ltd | Education | 2021 |
| Ananta Estates Ltd | Real estate | 2015 |
| Anashe Services Ltd | Health & social care | 2020 |
| Andevost Ltd | Wholesale & retail | 2021 |
| Andra ROM Ltd | Construction | 2023 |
| Anee and Aaro Limited | Professional & scientific | 2022 |
| Angel Guardianship Limited | Education | 2020 |
| Animal Whisperer Limited | Wholesale & retail | 2024 |
| Anishaspice Ltd | Hospitality | 2019 |
| Annapurna Construction Ltd | Construction | 2021 |
| Annapurna Rasoi Limited | Hospitality | 2025 |
| Anrosi Limited | Transport & logistics | 2024 |
| Antthan Properties Ltd | Construction | 2024 |
| Anugraha Ventures Limited | Information & communication | 2015 |
| Anwar Saleh Baabbad Investment Ltd | Wholesale & retail | 2025 |
| Anything, Everything Electrical Ltd | Construction | 2025 |
| AP Eco Developments Ltd | Construction | 2025 |
| AP People Recruitment Limited | Administrative & support | 2015 |
| Apex Drylining Ltd | Construction | 2025 |
| Apex Financial Compliance Ltd | Professional & scientific | 2021 |
| Apex Inventory Services Limited | Real estate | 2022 |
| Apex Prorecruiter Ltd | Administrative & support | 2024 |
| Apex Textiles Ltd | Water & waste | 2026 |
| Apex Valley Glasgow Limited | Real estate | 2024 |
| Apex Valley Investments Limited | Financial services | 2024 |
| Apex Valley Limited | Real estate | 2023 |
| APG Consultants Group Ltd | Construction | 2023 |
| Aphrodiziac Place UK Limited | Wholesale & retail | 2020 |
| Aplattkitchen Ltd | Hospitality | 2023 |
| Aplus Accountancy Limited | Professional & scientific | 2018 |
| Apollo Music Limited | Manufacturing | 1959 |
| Appartment Living Ltd | Extraterritorial | 2023 |
| Appology Technologies Limited | Information & communication | 2017 |
| Aquaflow Trading Ltd | Wholesale & retail | 2024 |
| Aqusof Gleam Limited | Extraterritorial | 2023 |
| Arabia Trade Company Ltd | Wholesale & retail | 2024 |
| Arbecht Join Ltd | Wholesale & retail | 2023 |
| Arcane Automotive Limited | Wholesale & retail | 2024 |
| Arch Restaurants Limited | Hospitality | 2019 |
| Arcos Consulting Ltd | Information & communication | 2014 |
| ARD Fire Alarms Ltd | Administrative & support | 2017 |
| Ardecora Limited | Construction | 2013 |
| Aredian Limited | Wholesale & retail | 2025 |