| A.I.A Estate Limited | Real estate | 2025 |
| A.I.Nahknap Ltd | Wholesale & retail | 2024 |
| A.J. Wood Limited | Construction | 2003 |
| A.J.J Ltd | Wholesale & retail | 2025 |
| A.J.R. Elsworth Limited | Wholesale & retail | 1971 |
| A.Khn Ltd | Wholesale & retail | 2024 |
| A.L Inspections Ltd | Manufacturing | 2025 |
| A.M.A Motors Bolton Ltd | Wholesale & retail | 2018 |
| A.M.G. Developments (Northern) Limited | Real estate | 2016 |
| A.M.P. Properties Ltd | Real estate | 1997 |
| A.M.R Renovate Limited | Construction | 2025 |
| A.N.C. Ventilation Limited | Construction | 2013 |
| A.P. Openshaw Decorators Limited | Construction | 2003 |
| A.P.A. (Bolton) Limited | Wholesale & retail | 2017 |
| A.P.F Gadget Shop Ltd | Real estate | 2025 |
| A.R. Hurst (Lithaprint) Limited | Manufacturing | 1978 |
| A.R.B. Builders & Joiners Limited | Manufacturing | 2003 |
| A.R.I.E.L Xpress Ltd | Other services | 2019 |
| A.R.T Frameworks Ltd | Health & social care | 2026 |
| A.S Building Contractors Bolton Ltd | Construction | 2016 |
| A.S News Bolton Ltd | Wholesale & retail | 2020 |
| A.T. Helm Ltd | Real estate | 2010 |
| A.W. (Window Cleaning Services) Limited | Administrative & support | 2000 |
| A.W. Consultancy Limited | Administrative & support | 2004 |
| A.W.A. Management Services Limited | Professional & scientific | 1990 |
| A1 Bolton Limited | Professional & scientific | 2010 |
| A1 Carpets N Floor Ltd | Construction | 2023 |
| A1 CUT Hairdressing Ltd | Other services | 2025 |
| A1 Drainage Solutions NW Ltd | Administrative & support | 2016 |
| A1 Fish 168 Ltd | Hospitality | 2026 |
| A1 Group Holdings (NW) Ltd | Financial services | 2026 |
| A1 Healthcare Ltd | Wholesale & retail | 2009 |
| A1 Logistics NW Ltd | Transport & logistics | 2021 |
| A1 Recycling and Renewables NW Ltd | Water & waste | 2023 |
| A1 Shutters Limited | Manufacturing | 1988 |
| A13D Limited | Arts & recreation | 2019 |
| A2B GAS Ltd | Construction | 2024 |
| A2F Group Limited | Real estate | 2023 |
| A2F Holdings Limited | Real estate | 2022 |
| A2U Travels Ltd | Transport & logistics | 2025 |
| A2Z Brands Store Ltd | Wholesale & retail | 2024 |
| A2Z Direct Limited | Transport & logistics | 2010 |
| A2Z Pallet Transport Ltd | Transport & logistics | 2025 |
| A2Z Security Ltd | Administrative & support | 2025 |
| A2Z Testing Limited | Information & communication | 2025 |
| A2Z Transferz Ltd | Transport & logistics | 2025 |
| A3 Design and Installation Ltd | Construction | 2024 |
| A4H Trader Ltd | Wholesale & retail | 2025 |
| A6 Hand Car Wash Limited | Administrative & support | 2024 |
| A6 Scaffolding Ltd | Construction | 2017 |
| A6 Windows Limited | Construction | 2011 |
| A7 Compliance Ltd | Professional & scientific | 2026 |
| AA Assets and Investments Limited | Households | 2021 |
| AA CAB Services Ltd | Transport & logistics | 2021 |
| AA Capital Properties Ltd | Real estate | 2025 |
| AA Consultants (NW) Ltd | Professional & scientific | 2019 |
| AA Ecom Services Ltd | Wholesale & retail | 2025 |
| AA Education Consultancy Ltd | Education | 2022 |
| AA Executive Travels Ltd | Transport & logistics | 2026 |
| AA Express Bargains Ltd | Wholesale & retail | 2023 |
| AA Health Ltd | Health & social care | 2017 |
| AA Healthcare Plus Ltd | Wholesale & retail | 2021 |
| AA Horse Transport Ltd | Transport & logistics | 2025 |
| AA Innovations Ltd | Health & social care | 2022 |
| AA Interprises Ltd | Wholesale & retail | 2025 |
| AA Locksmith NW Ltd | Other services | 2018 |
| AA Plumbing & Heating NW Ltd | Construction | 2024 |
| AA Propco Ltd | Real estate | 2017 |
| AA Properties & Sons Ltd | Real estate | 2023 |
| AA Property and Investments Limited | Financial services | 2008 |
| AA Shutters & Shop Fronts Ltd | Construction | 2025 |
| AA Soft Limited | Information & communication | 2019 |
| AA Solicitors Limited | Professional & scientific | 2012 |
| AA Speedlink Ltd | Transport & logistics | 2026 |
| AA Tradeflow Ltd | Wholesale & retail | 2025 |
| AA Vehicles Ltd | Wholesale & retail | 2026 |
| AA Vision Ltd | Wholesale & retail | 2025 |
| Aa&O Limited | Hospitality | 2025 |
| AA2B Couriers Ltd | Transport & logistics | 2015 |
| AAA Import Cars Limited | Wholesale & retail | 2024 |
| AAA Investments (NW) Ltd | Real estate | 2025 |
| AAA Medical Limited | Health & social care | 2021 |
| Aaajs Limited | Information & communication | 2021 |
| Aaan Builders Ltd | Construction | 2024 |
| Aaan Store Ltd | Wholesale & retail | 2023 |
| Aaaz Investments Ltd | Real estate | 2021 |
| Aabi Properties Ltd | Real estate | 2023 |
| AAC Transport Soloutions Ltd | Transport & logistics | 2025 |
| Aadam and Co Limited | Other services | 2023 |
| Aags Solutions Limited | Professional & scientific | 2024 |
| AAH14 Ltd | Construction | 2022 |
| AAI Properties (Bolton) Ltd | Real estate | 2021 |
| Aaleads Limited | Professional & scientific | 2026 |
| AAM Pipe&Fab Limited | Other services | 2006 |
| Aama Trade Ltd | Hospitality | 2024 |
| Aamilah Fashion Limited | Wholesale & retail | 2024 |
| Aamyra Limited | Real estate | 2023 |
| Aandylanguages Ltd | Professional & scientific | 2020 |
| AAR Investments Ltd | Real estate | 2009 |
| Aardvark Cleaning Solutions Ltd | Administrative & support | 2025 |