| Advanced Land & Development Design Ltd | Construction | 2017 |
| Advanced Motor Developments Ltd. | Wholesale & retail | 2015 |
| Advanced Personal Protection Limited | Wholesale & retail | 2025 |
| Advanced Pipelines Limited | Construction | 2011 |
| Advanced Resins Limited | Extraterritorial | 2006 |
| Advanced Ripening Technologies Limited | Construction | 2002 |
| Advanced Studwelding Systems Limited | Professional & scientific | 2002 |
| Advanceium | Professional & scientific | 2026 |
| Advantage Decor Ltd | Construction | 2011 |
| ADVC8 Limited | Information & communication | 2018 |
| Adveritate | Professional & scientific | 2024 |
| Advert Empire Ltd | Professional & scientific | 2025 |
| Aegb Holdings Ltd | Construction | 2019 |
| Aegis Private Health Consultant Limited | Professional & scientific | 2025 |
| Aeon Innovations Ltd | Wholesale & retail | 2024 |
| AER Joinery Ltd | Construction | 2014 |
| Aera Property Ltd | Real estate | 2025 |
| Aesthetic Training Hub Ltd | Education | 2026 |
| Aesthetics by Carrie Wigan Ltd | Other services | 2024 |
| Aesthetikates Skin Skool Ltd | Other services | 2025 |
| Aesthipharma Limited | Wholesale & retail | 2024 |
| AF Vision Ltd | Wholesale & retail | 2024 |
| Affinity Application Software Ltd | Information & communication | 2026 |
| Affordable Contractors Ltd | Real estate | 2011 |
| Affordable Contractors North West Ltd | Real estate | 2018 |
| AFI Projects Limited | Construction | 2024 |
| AFP Electrical & Telecommunication Rail Systems Consultancy Ltd | Professional & scientific | 2020 |
| African Tribal Art Ltd | Arts & recreation | 2024 |
| AG Brickwork NW Ltd | Construction | 2026 |
| AG Electronics Limited | Wholesale & retail | 2014 |
| AG Properties (Wigan) Ltd | Real estate | 2024 |
| AG86 Ltd | Hospitality | 2024 |
| Agas Film Ltd | Information & communication | 2019 |
| AGE Concern Wigan Borough | Health & social care | 2003 |
| AGE UK Wigan Borough Enterprises Limited | Health & social care | 1997 |
| Ageaham Limited | Other services | 2018 |
| AGF Shipping Limited | Transport & logistics | 2009 |
| AGH (Options) Limited | Construction | 2022 |
| AGH Developments Limited | Construction | 2013 |
| AGH Fire Protection Limited | Construction | 2024 |
| Agha Foods Ltd | Hospitality | 2023 |
| Agile Journeys Limited | Information & communication | 2018 |
| Agolo Metal Work Ltd | Manufacturing | 2025 |
| Agriversa International PLC | Professional & scientific | 2020 |
| AGS Precision Drywall Ltd | Construction | 2026 |
| Agsar Ltd | Hospitality | 2020 |
| AH Residential Holdings Ltd | Real estate | 2025 |
| AH Stores Ltd | Wholesale & retail | 2016 |
| AHL Homes Limited | Construction | 2019 |
| Ahmad Boss Ltd | Wholesale & retail | 2025 |
| AI Medical Services Ltd | Health & social care | 2023 |
| AI571 Labs Ltd | Information & communication | 2025 |
| Aikotech Ltd | Manufacturing | 2024 |
| AIM Chicken Ltd | Hospitality | 2025 |
| AIM Fire Protection Services Limited | Construction | 2026 |
| Aimac Ltd | Professional & scientific | 2018 |
| Aimat Ltd | Professional & scientific | 2024 |
| Aimsurv Ltd | Professional & scientific | 2018 |
| Ainscopropco Ltd | Real estate | 2025 |
| Ainscough Atkinson & Co Limited | Wholesale & retail | 2026 |
| Ainscough Civils Limited | Construction | 2019 |
| Ainscough Crane Hire Ltd | Construction | 1996 |
| Ainscough Evlow Ltd | Transport & logistics | 2025 |
| Ainscough Industrial Services Limited | Professional & scientific | 2013 |
| Ainscough Investments Limited | Professional & scientific | 2007 |
| Ainscough Logistics Group Limited | Transport & logistics | 2026 |
| Ainscough Wind Energy Services Limited | Extraterritorial | 2010 |
| Air Compressors & Equipment Limited | Administrative & support | 2005 |
| Air Cool Direct Ltd | Wholesale & retail | 2019 |
| Airflow Limited | Real estate | 2008 |
| Airflow Plumbing & Heating Ltd | Construction | 2025 |
| Airvending Limited | Other services | 1984 |
| AIS Eurelo Limited | Manufacturing | 2020 |
| AIS Flegg Projects Ltd | Manufacturing | 2008 |
| AIS Integrated Services Ltd | Extraterritorial | 1981 |
| AIS Offshore Renewables Limited | Manufacturing | 2012 |
| AIS Projects Limited | Manufacturing | 2001 |
| AIS Vanguard Limited | Manufacturing | 2014 |
| AIS VIG Industrial Ltd | Manufacturing | 2018 |
| AIS Wind Energy Ltd | Manufacturing | 2019 |
| Aiser Ltd | Construction | 2018 |
| Aitch Pharma Ltd | Professional & scientific | 2022 |
| AJ Car Cleaning Centre Ltd | Administrative & support | 2025 |
| AJ Car Wash Ltd | Wholesale & retail | 2026 |
| AJ Convenience Store (NW) Ltd | Wholesale & retail | 2025 |
| AJ Software Development Limited | Information & communication | 2026 |
| AJ UK Services Ltd | Professional & scientific | 2024 |
| AJ Wireless Limited | Information & communication | 2010 |
| Aj's Convenience Store Ltd | Wholesale & retail | 2023 |
| AJB Isolations Ltd | Construction | 2026 |
| AJB Property(Standish) Ltd | Real estate | 2021 |
| Ajbdesign Limited | Professional & scientific | 2026 |
| AJC Brickwork Ltd | Construction | 2018 |
| AJH CAD Limited | Professional & scientific | 2013 |
| AJH Property Management Ltd | Real estate | 2022 |
| AJM Mech Ltd | Manufacturing | 2026 |
| AJO (NW) Limited | Administrative & support | 2024 |
| AJP Rigging Limited | Administrative & support | 2016 |
| AK Melling Ltd | Real estate | 2021 |
| AK2 Consultancy Management Ltd | Professional & scientific | 2025 |