| Aarul Limited | Real estate | 2023 |
| Aarvi Limited | Wholesale & retail | 2017 |
| Aarvi Rana Ltd | Construction | 2024 |
| Aarya Home Services Ltd | Real estate | 2026 |
| Aaryan Group Limited | Wholesale & retail | 2025 |
| AAS Property Management Ltd | Real estate | 2026 |
| Aasaiya Ltd | Wholesale & retail | 2024 |
| Aasara Interiors Ltd | Professional & scientific | 2024 |
| Aasha Info Ltd | Information & communication | 2021 |
| Aasha Training Ltd | Education | 2025 |
| Aashaard Intelligence Ltd | Information & communication | 2025 |
| Aashaard Ventures Ltd | Financial services | 2023 |
| Aashaki Properties Ltd | Real estate | 2026 |
| Aashatelier Ltd | Manufacturing | 2025 |
| Aashritha Ltd | Information & communication | 2010 |
| Aathesh Limited | Real estate | 2021 |
| AAV Services Ltd | Transport & logistics | 2024 |
| Aaveek Ltd | Wholesale & retail | 2020 |
| Aavhatch Limited | Health & social care | 2016 |
| Aavrus & Co Ltd | Professional & scientific | 2011 |
| Aavsci Limited | Professional & scientific | 2019 |
| Aavurton Travels & Tours Ltd | Transport & logistics | 2024 |
| Aayan & Co Limited | Professional & scientific | 2014 |
| Aayan Food Group Ltd | Wholesale & retail | 2010 |
| Aayan Services Ltd | Administrative & support | 2025 |
| Aaykinze Ltd | Wholesale & retail | 2021 |
| AAZ Dwellings & Lettings Ltd | Households | 2026 |
| AAZ Enterprise Ltd | Hospitality | 2023 |
| AAZ Homes Limited | Real estate | 2026 |
| Aaziz Enterprises Limited | Wholesale & retail | 2025 |
| AB Asset Management Limited | Real estate | 2007 |
| AB Bargains Ltd | Wholesale & retail | 2026 |
| AB Bullet Limited | Arts & recreation | 2025 |
| AB Consulting Group Ltd | Administrative & support | 2017 |
| AB Continental Furnishings Limited | Real estate | 1999 |
| AB Estates & Property Ltd | Real estate | 2026 |
| AB Info Service Ltd | Information & communication | 2025 |
| AB London Traders Limited | Wholesale & retail | 2026 |
| AB Recycle UK Ltd | Water & waste | 2024 |
| AB Saboor Ltd | Wholesale & retail | 2026 |
| AB Security Services Ltd | Administrative & support | 2026 |
| AB Short Stay Limited | Hospitality | 2026 |
| AB Wood Property Limited | Real estate | 2023 |
| Ab&R Services Ltd | Information & communication | 2025 |
| Ab&S Investments Limited | Wholesale & retail | 2025 |
| AB1 Motors Ltd | Wholesale & retail | 2023 |
| AB3WORKSHOPS Limited | Arts & recreation | 2010 |
| ABA Associates (GB) Ltd | Professional & scientific | 2010 |
| ABA Delivery Ltd | Transport & logistics | 2020 |
| ABA Enterprise Limited | Wholesale & retail | 2017 |
| ABA Security Ltd | Administrative & support | 2022 |
| ABA Ventures Ltd | Real estate | 2026 |
| Abaancart Ltd | Professional & scientific | 2025 |
| Abacus Fashions Limited | Wholesale & retail | 1992 |
| Abacus Financial Accountants Limited | Professional & scientific | 2013 |
| Abacus Investments (U.K) Ltd | Construction | 2016 |
| Abacus Numerarius Limited | Administrative & support | 2026 |
| Abacus RES Holdings Limited | Real estate | 2021 |
| Abacus Schools Financial Services Ltd | Administrative & support | 2013 |
| Abacus Stocker Valuers Limited | Extraterritorial | 2014 |
| Abbas Financial Consultant Ltd | Professional & scientific | 2012 |
| Abbas Glass and Glazing Limited | Professional & scientific | 2012 |
| Abbas Khan Mahmood Ltd | Wholesale & retail | 2025 |
| Abbas Locums Ltd | Health & social care | 2025 |
| Abbas Meat Ltd | Wholesale & retail | 2015 |
| Abbas Medical Consultancy Limited | Health & social care | 2009 |
| Abbas Motors Ltd | Wholesale & retail | 2023 |
| Abbas Motorz Ltd | Wholesale & retail | 2025 |
| Abbas Photography Limited | Professional & scientific | 2015 |
| Abbasi Food Ltd | Hospitality | 2023 |
| Abbasi Ltd | Wholesale & retail | 2014 |
| Abbasi Signs & Shutters Ltd | Professional & scientific | 2024 |
| Abbass Group of Companies Limited | Wholesale & retail | 2025 |
| Abbe Brooks Ltd | Wholesale & retail | 2015 |
| Abbey Home Essentials Ltd | Wholesale & retail | 2023 |
| Abbi Consulting Engineers Ltd | Professional & scientific | 2001 |
| Abbm Ltd | Construction | 2023 |
| Abbotswood Lodge Ltd. | Health & social care | 1993 |
| Abbotts Building Ltd | Construction | 2014 |
| Abbotts Lilly Ltd | Health & social care | 2019 |
| Abbotts Rose Ltd | Hospitality | 2018 |
| ABC Concept Ltd | Construction | 2022 |
| ABC Installer Limited | Construction | 2023 |
| ABC Property a Limited | Real estate | 2024 |
| ABC Property B Limited | Real estate | 2024 |
| Abcs Services Ltd | Administrative & support | 2024 |
| Abdelsalam Limited | Other services | 2025 |
| Abdgha Ltd | Wholesale & retail | 2026 |
| Abdifatah Muuse Bore Limited | Transport & logistics | 2025 |
| Abdul a Associates Limited | Professional & scientific | 2015 |
| Abdul Accounting Associates Limited | Professional & scientific | 2011 |
| Abdul Basit Enterprises Ltd | Manufacturing | 2025 |
| Abdul Raqeeb Ltd | Wholesale & retail | 2025 |
| Abed Trading UK Ltd | Wholesale & retail | 2016 |
| Abedin Properties Ltd | Real estate | 2018 |
| Abel Care Ltd | Health & social care | 2013 |
| Abelia Fast Food Ltd | Hospitality | 2023 |
| Aberdour Road Ltd | Real estate | 2025 |
| Abevelit Ltd | Construction | 2025 |
| ABF Cars Limited | Other services | 2014 |