| Agile Engineering Practices Ltd | Administrative & support | 2017 |
| Agora Global Ltd | Professional & scientific | 2018 |
| Agriveta Ltd | Manufacturing | 2026 |
| AH Car Services Ltd | Transport & logistics | 2025 |
| AH Gardner UK Ltd | Real estate | 2024 |
| Ahlux Court 1-8 RTM Company Limited | Households | 2024 |
| Ahlux Court 9-39 RTM Company Limited | Households | 2024 |
| Ahph Ltd | Real estate | 2014 |
| Ahph One Ltd | Financial services | 2021 |
| Ahph Retail Ltd | Wholesale & retail | 2022 |
| Ahpn Ltd | Hospitality | 2022 |
| AI Driven Solutions Ltd | Information & communication | 2025 |
| AI Electrical (NW) Limited | Manufacturing | 2020 |
| Aidan Piers (1992) Limited | Wholesale & retail | 2012 |
| Aidan Piers Leasing Limited | Administrative & support | 2021 |
| Aidan Piers Limited | Wholesale & retail | 1995 |
| Aidatalytics Ltd | Information & communication | 2025 |
| Aikmo Aircon Limited | Construction | 2015 |
| Aikmo Aviation & Marine Ltd | Administrative & support | 2018 |
| Aikmo Care (Holdings) Ltd | Financial services | 2025 |
| Aikmo Gardens Limited | Administrative & support | 2014 |
| Aikmo Group Limited | Financial services | 2025 |
| Aikmo Hotels Limited | Hospitality | 2015 |
| Aikmo Medical Limited | Health & social care | 1995 |
| Aikmo Recruitment Limited | Administrative & support | 2015 |
| Aikmo Trading Limited | Wholesale & retail | 2003 |
| AIM Sky High CIC | Education | 2024 |
| AIM Sky High Talent Ltd | Professional & scientific | 2019 |
| Aiza Engineering Limited | Administrative & support | 2016 |
| Aiza Properties Limited | Real estate | 2024 |
| AJ Motor Sales Ltd | Wholesale & retail | 2016 |
| AJ Trailer Services Ltd | Wholesale & retail | 2023 |
| AJB Consultancy Services Ltd | Professional & scientific | 2018 |
| Ajith George Consultancy Ltd | Real estate | 2011 |
| AJM Plumbing & Heating NW Ltd | Construction | 2024 |
| AJS Esales Limited | Wholesale & retail | 2016 |
| AK Prestige Ltd | Wholesale & retail | 2026 |
| AK Properties Portfolio Ltd | Real estate | 2023 |
| Akai Live Ltd | Arts & recreation | 2024 |
| Akio Sushi Ltd | Hospitality | 2019 |
| Akrobatt Properties Ltd | Real estate | 2019 |
| Akénluxe Limited | Wholesale & retail | 2024 |
| AL Afiyah Properties Limited | Real estate | 2026 |
| AL Mahdi Medical Services Ltd | Health & social care | 2019 |
| AL Massar Declan Limited | Professional & scientific | 2018 |
| Al-Mostafa Healthcare Ltd | Health & social care | 2025 |
| Alan Haslam Transport Ltd | Transport & logistics | 2026 |
| Alan's GAS Services Ltd | Construction | 2011 |
| Albert John Builders Limited | Construction | 2018 |
| Alderley Restaurant Limited | Hospitality | 2020 |
| Aldo Zanetti Limited | Professional & scientific | 2019 |
| Aldwood Ltd | Financial services | 2025 |
| Aleef Homes Limited | Real estate | 2024 |
| Alferno Limited | Hospitality | 2022 |
| ALI Hetherington Limited | Professional & scientific | 2003 |
| Align Site Solutions Ltd | Construction | 2026 |
| Alison Properties Limited | Real estate | 1994 |
| Alixandra Court Management Limited | Households | 1986 |
| ALL Because Communication Counts (Abcc) Ltd | Administrative & support | 2025 |
| ALL in One Manchester Ltd | Wholesale & retail | 2026 |
| ALL Rentals Limited | Real estate | 2019 |
| ALL Saints Management (NE) Ltd | Real estate | 2019 |
| Allah Nawaz 14 Associates Limited | Health & social care | 2025 |
| Allens Auto Services Limited | Wholesale & retail | 2002 |
| Allsop Civil Engineering Limited | Professional & scientific | 2004 |
| Allspark Electrical & Data Ltd | Construction | 2020 |
| Alltex Home Furnishings Ltd. | Wholesale & retail | 1998 |
| Allurentis Limited | Information & communication | 2008 |
| Almalette Ltd | Real estate | 2020 |
| Alonso Civil Engineering Services Ltd | Professional & scientific | 2023 |
| Alorha Ltd | Wholesale & retail | 2025 |
| Alpha-Lyseis Consulting Ltd | Administrative & support | 2018 |
| Alps Trucks Ltd | Hospitality | 2026 |
| ALS Health Ltd | Health & social care | 2024 |
| Alshawi Property LLP | | 2020 |
| Altapete Ltd | Wholesale & retail | 2020 |
| Altrincham IT Services Ltd | Wholesale & retail | 2005 |
| Altrincham MOT Centre Limited | Wholesale & retail | 2018 |
| Altrincham Plumbing Supplies Limited | Wholesale & retail | 2002 |
| Altrincham Property Network Ltd | Administrative & support | 2024 |
| Alula Aesthetics Ltd | Health & social care | 2025 |
| Aluna Minds Limited | Other services | 2025 |
| Alvi Orthopaedics Limited | Health & social care | 2023 |
| Alvi Properties and Investment Ltd | Real estate | 2023 |
| Alzahra Limited | Health & social care | 2008 |
| AM Maintenance Group Ltd | Administrative & support | 2021 |
| Amanda Gleam Ltd | Administrative & support | 2025 |
| Amaric Investments Ltd | Real estate | 2023 |
| Amaric Property Investments Ltd | Real estate | 2023 |
| Amaze Assets Ltd | Real estate | 2024 |
| Amazing Communities Together C.I.C. | Other services | 2023 |
| Amberfilm Ltd | Information & communication | 2008 |
| Amberley Estates Limited | Real estate | 2024 |
| Amberoofing Solutions Limited | Construction | 2015 |
| Ameneh Irankhah's Limited | Information & communication | 2022 |
| Amgate Ltd | Administrative & support | 2025 |
| Amicable Property Solutions Ltd | Real estate | 2010 |
| Amirion Ltd | Health & social care | 2023 |
| Amiry Consultancy Ltd | Professional & scientific | 2016 |
| Amisa Services Ltd | Information & communication | 2026 |