| Abtt Consulting Ltd | Professional & scientific | 2025 |
| ABU Ubaidah Ltd | Administrative & support | 2018 |
| ABU Zahraa Trade Ltd | Wholesale & retail | 2026 |
| Abundax Ltd | Wholesale & retail | 2025 |
| Abutaxi Ltd | Transport & logistics | 2026 |
| ABV Dental Limited | Health & social care | 2021 |
| ABY Thomas Welding Inspection Ltd | Professional & scientific | 2023 |
| AC 168 Ltd | Other services | 2023 |
| AC Bathroom & Boilers Ltd | Construction | 2025 |
| AC Lifting Limited | Transport & logistics | 2025 |
| AC Painting and Decorating Services Ltd | Construction | 2025 |
| AC Pressure Washers Limited | Wholesale & retail | 2017 |
| AC Tattoo Ltd | Arts & recreation | 2024 |
| Acacia Dales Services Ltd | Public administration | 2023 |
| Acacia Financial Limited | Professional & scientific | 2023 |
| Acas Engineering Ltd | Manufacturing | 2015 |
| Accelerate Properties Limited | Real estate | 2022 |
| Accendo Medico Legals Ltd | Administrative & support | 2013 |
| Accent Slope Building Lmited Limited | Construction | 2021 |
| Access for the Disabled Limited | Administrative & support | 2015 |
| Access Health Ltd | Professional & scientific | 2026 |
| Access Lancashire C.I.C. | Information & communication | 2024 |
| Access Opening Systems (Installations) Ltd | Manufacturing | 2011 |
| ACCESS100 Ltd | Information & communication | 2025 |
| Accesstack Limited | Information & communication | 2026 |
| Accident Angels Ltd | Administrative & support | 2006 |
| Accident Replacement Ltd | Other services | 2026 |
| Accnovate Ltd | Professional & scientific | 2025 |
| Accomplished Care PVT Ltd | Health & social care | 2025 |
| Accord Enterprise Limited | Wholesale & retail | 2007 |
| Accord Strategic Management Ltd | Professional & scientific | 2004 |
| Accounts and Tax Returns Ltd | Professional & scientific | 2002 |
| Accutest Labs Ltd | Information & communication | 2025 |
| Ace Cars Chorley Limited | Transport & logistics | 2025 |
| Ace Consulting Group Limited | Information & communication | 2025 |
| Ace Customs (NW) Ltd | Wholesale & retail | 2026 |
| Ace Properties Freckleton Ltd | Real estate | 2017 |
| Ace Protein Limited | Manufacturing | 2017 |
| Ace Ringway Contract Hire Limited | Transport & logistics | 2013 |
| Ace Suppliers Ltd | Wholesale & retail | 2023 |
| Acea Holdings Limited | Extraterritorial | 2020 |
| Acea Properties Ltd | Extraterritorial | 2018 |
| Acebench Limited | Real estate | 1982 |
| Acen Limited | Real estate | 2024 |
| Acer Aesthetics Ltd | Health & social care | 2018 |
| Acer Clinic Limited | Health & social care | 2020 |
| Acer Engineering Limited | Manufacturing | 2000 |
| Acer Infinity Limited | Manufacturing | 2013 |
| Acer Properties North Ltd | Real estate | 2022 |
| Acetown Services Ltd | Real estate | 2022 |
| ACG House Renovations Limited | Construction | 2010 |
| ACH Properties (NW) Ltd | Construction | 2015 |
| ACH79 Limited | Financial services | 2023 |
| Achieve New Heights Ltd | Professional & scientific | 2020 |
| Achievement Through Collaboration Trust | Education | 2011 |
| Achill Business Consultancy Ltd | Professional & scientific | 2018 |
| Achilles Advisory Ltd | Professional & scientific | 2022 |
| Achilles Media Limited | Information & communication | 2026 |
| ACL Plumbing & Heating Limited | Construction | 2003 |
| Acland Banks Limited | Construction | 1995 |
| Acland Bracewell Management Limited | Real estate | 1979 |
| Acland Bracewell Surveyors Limited | Real estate | 1997 |
| ACM Systems (UK) Limited | Construction | 2001 |
| Acme E-Commerce Ltd | Wholesale & retail | 2026 |
| Acme Heating Services Ltd | Construction | 2017 |
| Acme Vape Ltd | Wholesale & retail | 2016 |
| Acompetent Limited | Information & communication | 2022 |
| Acorn Architects Limited | Professional & scientific | 2024 |
| Acorn Commercial Holdings Limited | Real estate | 2016 |
| Acorn Construction Ltd | Administrative & support | 2019 |
| Acorn Contracts Limited | Administrative & support | 2018 |
| Acorn Kitchens and Bedrooms Limited | Construction | 1987 |
| Acorn Property Services (N/W) Limited | Real estate | 2004 |
| Acornshield Properties Limited | Real estate | 1991 |
| Acountis Limited | Professional & scientific | 2025 |
| Acquick Ltd | Information & communication | 2026 |
| Acquired Property Management Ltd | Real estate | 2025 |
| ACS Print Ltd | Manufacturing | 2019 |
| ACT Architectural Design Services Ltd | Professional & scientific | 2020 |
| ACT Construction Management Ltd | Construction | 2019 |
| Actax Consulting Ltd | Professional & scientific | 2013 |
| Action for Lancashire CIC | Education | 2024 |
| Actions HQ Ltd | Wholesale & retail | 2021 |
| Activall Ltd | Arts & recreation | 2024 |
| Activate Your Life | Other services | 2008 |
| Active a V Ltd | Administrative & support | 2014 |
| Active Asset Property Management Ltd | Real estate | 2024 |
| Active Car Rental Ltd | Administrative & support | 2019 |
| Active Care NW Ltd | Health & social care | 2019 |
| Active Maintain Limited | Construction | 2024 |
| Activliving Physiotherapy Ltd | Health & social care | 2023 |
| Acton Group Services Limited | Construction | 2018 |
| Actually Group Limited | Real estate | 2021 |
| Actually Lodges Limited | Construction | 2019 |
| Actually Mortgages Limited | Financial services | 2008 |
| Actually Property Group Limited | Real estate | 2013 |
| Acumen Taxation Services (Manchester) Ltd | Professional & scientific | 2020 |
| Acwire Limited | Professional & scientific | 2014 |
| AD Anaesthetics Limited | Health & social care | 2022 |
| AD Mobile Enterprise Ltd | Wholesale & retail | 2025 |