| A4 Homes Ltd | Real estate | 2024 |
| A4 Property Management Limited | Real estate | 2013 |
| A400M Training Services Limited | Transport & logistics | 2012 |
| A7 Plumbing and Heating Limited | Construction | 2017 |
| AA Accountants South Limited | Professional & scientific | 2014 |
| AA Cleaning Limited | Other services | 2026 |
| AA Construction Services Limited | Construction | 2016 |
| AA Diamond Abodes Limited | Real estate | 2019 |
| AA Heating and GAS Services Ltd | Education | 2019 |
| AA IT Services (PVT) Ltd | Information & communication | 2012 |
| AA Telecoms Ltd | Information & communication | 2023 |
| AA Travels Limited | Administrative & support | 2014 |
| AAA Executive Cars Limited | Transport & logistics | 2019 |
| AAA Pizza House Ltd | Hospitality | 2026 |
| AAA Technologies Ltd | Information & communication | 2022 |
| Aaadtan Limited | Real estate | 2026 |
| AAB MOT Centre Limited | Wholesale & retail | 2020 |
| AAC Design Ltd | Wholesale & retail | 2026 |
| Aaccountancy Services Limited | Real estate | 2019 |
| Aadhi Consulting Limited | Information & communication | 2019 |
| Aadryan Ltd | Information & communication | 2015 |
| Aadya & Agastya Property Ltd | Real estate | 2020 |
| AAF Cleaning Services Limited | Administrative & support | 2022 |
| AAH Distribution Ltd | Wholesale & retail | 2023 |
| Aahar Groups Limited | Hospitality | 2017 |
| AAI Cars Ltd | Wholesale & retail | 2020 |
| Aakash Accounting Services Limited | Professional & scientific | 2014 |
| Aakruti Prime Properties Ltd | Construction | 2025 |
| Aaliyah Investments Limited | Real estate | 2025 |
| AAM1 Ltd | Real estate | 2022 |
| AAN Holding Limited | Other services | 2021 |
| AAN Property Management Ltd | Real estate | 2026 |
| Aancileco Limited | Information & communication | 2016 |
| Aanish PVT Ltd | Information & communication | 2021 |
| Aanya Network Limited | Professional & scientific | 2010 |
| Aanya Property Ltd | Real estate | 2018 |
| Aara Creative Studios Limited | Professional & scientific | 2024 |
| Aarav Residence Limited | Real estate | 2022 |
| Aarav Shah Pharma Limited | Professional & scientific | 2022 |
| Aarav Technologies Limited | Information & communication | 2013 |
| Aardvark International Transport Limited | Extraterritorial | 2016 |
| Aarish Trader Ltd | Wholesale & retail | 2024 |
| Aarna Tech Enterprises Ltd | Information & communication | 2018 |
| Aarnika Properties Limited | Real estate | 2021 |
| Aarohi Property Investments Limited | Real estate | 2022 |
| Aaron Dennis Limited | Administrative & support | 2016 |
| Aartech Limited | Information & communication | 2014 |
| Aartvark Collective Ltd | Manufacturing | 2019 |
| Aarushi Electrical and Plumbing Co Ltd | Construction | 2024 |
| Aarushinfocom Limited | Information & communication | 2018 |
| Aarx Consultancy Limited | Professional & scientific | 2020 |
| Aarya Management Consulting Ltd | Professional & scientific | 2023 |
| AAS Property Limited | Real estate | 2018 |
| Aasees Limited | Real estate | 2023 |
| Aaser Ltd Limited | Hospitality | 2025 |
| Aashiyana Ventures Limited | Real estate | 2021 |
| Aashiyanna Realtors Limited | Real estate | 2024 |
| Aashu Stores Ltd | Wholesale & retail | 2025 |
| Aaska Limited | Wholesale & retail | 2026 |
| Aatrics Technologies Limited | Information & communication | 2019 |
| Aaxo Ltd | Real estate | 2024 |
| AB & Co Capital Ltd | Financial services | 2024 |
| AB 2014 Limited | Professional & scientific | 2014 |
| AB Energy Consulting Limited | Professional & scientific | 2013 |
| AB Gardens & Landscaping Ltd | Administrative & support | 2025 |
| AB Heating & Plumbing Services Limited | Construction | 2021 |
| AB Rooms Ltd | Hospitality | 2023 |
| AB Trading Limited | Wholesale & retail | 2019 |
| AB Walker Associates Limited | Other services | 2017 |
| Ab&M Transport Ltd | Transport & logistics | 2014 |
| AB4 Property Management Ltd | Households | 2024 |
| Ababil Limited | Wholesale & retail | 2026 |
| Abacus Antics Ltd | Professional & scientific | 2018 |
| Abacus Window Cleaning BV Limited | Administrative & support | 2024 |
| Abattis Security Systems Limited | Construction | 2001 |
| Abbahouse Ltd | Health & social care | 2022 |
| Abbey Apple a Ltd | Arts & recreation | 2020 |
| Abbey Commercial Enterprises Limited | Real estate | 2007 |
| Abbey Gate Locksmiths Limited | Administrative & support | 2014 |
| Abbey Green (Eynsham) Management Company Limited | Households | 2021 |
| Abbey House Hotel Limited | Real estate | 2002 |
| Abbey Mews Residents Company Limited | Households | 2005 |
| Abbigail Richards Ltd | Other services | 2023 |
| Abbot Telecoms Ltd | Information & communication | 2018 |
| Abbots 354 Limited | Professional & scientific | 2005 |
| Abbots 355 Limited | Financial services | 2024 |
| Abbotskot Limited | Hospitality | 2024 |
| Abbotsmead Place Management Company Ltd | Households | 2021 |
| Abbott Landscaping Limited | Construction | 2002 |
| Abbott Regulatory Solutions Limited | Professional & scientific | 2017 |
| Abboud Healthcare Ltd | Financial services | 2025 |
| ABC Brickwork and Scaffolding Limited | Construction | 2001 |
| ABC Kick Ltd | Education | 2022 |
| ABC Lektor Ltd | Education | 2025 |
| ABC Medical Services (Reading) Limited | Health & social care | 2006 |
| ABC Medical Training Limited | Education | 2016 |
| ABC Mini Coaches Limited | Transport & logistics | 2020 |
| ABC Travel (Wokingham) Limited | Transport & logistics | 2017 |
| ABC Travel Limited | Transport & logistics | 2019 |
| ABC4 Limited | Professional & scientific | 2015 |