| Accountancy Solutions Atabaky Ltd | Professional & scientific | 2017 |
| Accurate Hearing Ltd | Wholesale & retail | 2013 |
| Accurate Site Management Limited | Construction | 2014 |
| Ace Cafe Events Limited | Extraterritorial | 2010 |
| Ace Floors Ltd | Construction | 2025 |
| Ace of Taste Limited | Hospitality | 2011 |
| Ace Recovery Limited | Transport & logistics | 2007 |
| ACF Contractors Limited | Construction | 2009 |
| ACO Associates Limited | Transport & logistics | 2013 |
| Acorn Legal Consultants Limited | Professional & scientific | 2002 |
| Acorn Plastics Ltd | Construction | 2024 |
| Acrales Limited | Administrative & support | 2002 |
| ACT Meters (UK) Ltd | Manufacturing | 2013 |
| Actb Properties Ltd | Real estate | 2023 |
| Action Freight Forwarders Limited | Extraterritorial | 2014 |
| Action Import and Export Group Limited | Financial services | 2014 |
| Action Import and Export Limited | Extraterritorial | 2014 |
| Action International Group EOT Limited | Financial services | 2023 |
| Actionone Limited | Information & communication | 2022 |
| Active Interpreting and Training Ltd | Professional & scientific | 2018 |
| Active IT Support Ltd | Information & communication | 2009 |
| AD Motors by Ltd | Wholesale & retail | 2025 |
| AD Surveys Ltd | Information & communication | 2019 |
| ADA Architectural Design Associates Ltd | Professional & scientific | 2020 |
| Adam & EVE Cars Ltd | Wholesale & retail | 2019 |
| Adam Companies Limited | Construction | 2020 |
| Adam Medical Limited | Health & social care | 2010 |
| Adams Apple Limited | Wholesale & retail | 2002 |
| Adams Properties & Investments Ltd | Real estate | 2022 |
| Adaptive Communication Solutions Ltd | Information & communication | 2003 |
| Adaptivecomms Group Limited | Financial services | 2019 |
| Adaptivecomms Ltd | Information & communication | 2003 |
| Addelec Electrical Ltd | Construction | 2013 |
| Address Homes Ltd | Households | 2017 |
| Address Investments Ltd | Real estate | 2021 |
| Adelphi Chambers Limited | Real estate | 2008 |
| ADH Builders Limited | Construction | 2023 |
| Adhd Wellbeing Solutions Ltd | Health & social care | 2025 |
| Adhr Limited | Administrative & support | 2017 |
| Adkat Building Maintenance Ltd | Construction | 2024 |
| Adlevers Limited | Information & communication | 2015 |
| ADM Executive Travel Ltd | Transport & logistics | 2020 |
| Adminstream Ltd | Administrative & support | 2022 |
| Adoni Developments Limited | Construction | 2014 |
| Adrian Konopka Transport Limited | Transport & logistics | 2017 |
| Adunn Limited | Real estate | 2024 |
| Advance Accountancy Holdings Limited | Financial services | 2023 |
| Advance Accountancy Limited | Professional & scientific | 2016 |
| Advance Audit Limited | Professional & scientific | 2016 |
| Advance Building Services Yorkshire Limited | Construction | 2020 |
| Advanced Approach Limited | Information & communication | 2009 |
| Advanced Interior Systems Limited | Construction | 1981 |
| Advanced Interior Systems NW Ltd | Construction | 2015 |
| Advantage U Limited | Education | 2023 |
| Adwick Aviation Medical Examiner Limited | Health & social care | 2015 |
| AEC Contractors Ltd | Administrative & support | 2009 |
| Aegis Accountancy Ltd | Professional & scientific | 2011 |
| AEJ Infosec Ltd | Information & communication | 2023 |
| AEM Contractors Ltd | Administrative & support | 2017 |
| Aeroscope Developments Limited | Real estate | 2005 |
| Aesthetics by EL Ltd | Other services | 2024 |
| Afcf Limited | Construction | 2025 |
| Afei Ltd | Construction | 2024 |
| Affinity Infusion Ltd | Wholesale & retail | 2018 |
| African Community Southport CIC | Other services | 2024 |
| African Portuguese Speaking Community | Information & communication | 2018 |
| AFT Assist Ltd | Financial services | 2014 |
| AFT Capital Ltd | Real estate | 2015 |
| AFT Equities Ltd | Financial services | 2015 |
| After Care (N W) Holdings Limited | Real estate | 2023 |
| After Care (N W) Limited | Health & social care | 2001 |
| After Care (N W) Plus Limited | Health & social care | 2017 |
| After Care (NW) Properties Limited | Real estate | 2023 |
| Aftercare - the Next Step Limited | Health & social care | 2009 |
| Agile Leaf Ltd | Information & communication | 2024 |
| Agility Medtech Limited | Health & social care | 2019 |
| AGM Accounting Services Ltd | Professional & scientific | 2018 |
| Agrovirac Trans Ltd | Transport & logistics | 2022 |
| AGS Lord Street Ltd | Real estate | 2023 |
| AH Bodyworx Ltd | Wholesale & retail | 2024 |
| AH2 Buxton Limited | Construction | 2021 |
| AH2 Developments Limited | Real estate | 2017 |
| AH2 GEE Cross Limited | Construction | 2022 |
| Ahead in the Cloud Ltd | Information & communication | 2017 |
| Ahico Ltd | Wholesale & retail | 2026 |
| AHS Healthcare (Southport) Ltd. | Real estate | 2017 |
| AI Native Ltd | Information & communication | 2024 |
| AI Video Services Limited | Information & communication | 2025 |
| Ainsdale Car Centre Ltd | Wholesale & retail | 2014 |
| Ainsdale Fish and Chips Ltd | Hospitality | 2024 |
| Ainsdale Functions Room Ltd | Real estate | 2022 |
| Ainsdale GAS Ltd | Construction | 2012 |
| Ainsdale Gastro Restaurant Ltd | Hospitality | 2024 |
| Ainsdale Home&Garden Ltd | Wholesale & retail | 2024 |
| Ainsdale Hospitality Ltd | Hospitality | 2025 |
| Ainsdale Lunch and Leisure | Hospitality | 2009 |
| Ainsdale Management Company Southport Limited | Households | 2001 |
| Ainsdale Pasta and Pizzera Limited | Hospitality | 2025 |
| Ainsdale Press Limited(The) | Manufacturing | 1966 |
| Ainsdalehair Limited | Other services | 2012 |