| Air Street Management Ltd | Real estate | 2022 |
| AIX Partners Ltd | Professional & scientific | 2026 |
| AJ & Co Interior Design Ltd | Professional & scientific | 2019 |
| AJ 4X4 Automotive Limited | Wholesale & retail | 2020 |
| AJ Aggregates Ltd | Administrative & support | 2023 |
| AJ Architectural Ltd | Professional & scientific | 2019 |
| AJ Electrical Installation Ltd | Construction | 2026 |
| AJ Oakmont Property Ltd | Real estate | 2020 |
| AJ Properties Southport Ltd | Real estate | 2020 |
| AJC Property Management (North West) Ltd | Real estate | 2021 |
| Ajcm Limited | Professional & scientific | 2006 |
| AJJ Pubs and Bars Ltd | Hospitality | 2026 |
| Ajlj Limited | Administrative & support | 2013 |
| Ajmv Ltd | Professional & scientific | 2023 |
| AJR Business Services Ltd | Information & communication | 2019 |
| AJR Courier Limited | Transport & logistics | 2017 |
| AJR Property Developments Ltd | Real estate | 2026 |
| Ajsg Holdings Limited | Financial services | 2016 |
| AK Gusto Ltd | Hospitality | 2024 |
| AK Nails & Spa Southport Ltd | Other services | 2024 |
| AK Trading Ltd | Wholesale & retail | 2022 |
| Akinyelelolu C Ltd | Health & social care | 2017 |
| AKR Electrical Services Limited | Construction | 2014 |
| Al-Lees Kitchen Ltd | Hospitality | 2026 |
| Alan Davies Property & Building Maintenance Ltd | Administrative & support | 2016 |
| Alarm Games Limited | Information & communication | 2024 |
| Albany Court (Southport) Limited | Households | 1996 |
| Albany Road Management Company NO. 2 Ltd | Households | 2000 |
| Albany Training Limited | Education | 2010 |
| Albaron (North West) Limited | Construction | 1993 |
| Albert Court Management Co.(Southport)Limited | Households | 1966 |
| Albert House Ltd | Real estate | 2011 |
| Albert Place Property Management Limited | Households | 2018 |
| Albion Export Hub Limited | Wholesale & retail | 2025 |
| Alcamrow Engineering Ltd | Professional & scientific | 2023 |
| Alcedo Blue Limited | Health & social care | 2017 |
| Alcedo Care Agency Limited | Health & social care | 2019 |
| Alcedo Care Group Limited | Health & social care | 2019 |
| Alcedo Care Limited | Health & social care | 2019 |
| Alcedo CH Limited | Real estate | 2023 |
| Alcedo Gold Limited | Health & social care | 2022 |
| Alcedo Green Limited | Health & social care | 2019 |
| Alcedo Group Limited | Health & social care | 2019 |
| Alcedo Healthcare Group Limited | Health & social care | 2019 |
| Alcedo Healthcare Limited | Health & social care | 2019 |
| Alcedo Homecare Limited | Health & social care | 2019 |
| Alcedo Orange Limited | Health & social care | 2017 |
| Alcedo Red Limited | Administrative & support | 2017 |
| Alchemy Design Landscape Ltd | Administrative & support | 2026 |
| Alder & ASH International Ltd | Wholesale & retail | 2025 |
| Alett Estates Ltd | Construction | 2025 |
| Alexade Trans Ltd | Transport & logistics | 2020 |
| Alexander Court (Management) Company Limited | Households | 1980 |
| Alexander's Landscapes Limited | Administrative & support | 2014 |
| Alexandra Broadway Management Co (2001) Limited | Households | 2001 |
| Alexandra Karanikolou Ltd | Administrative & support | 2015 |
| Alexandra Lodge (Management) Company Limited | Professional & scientific | 1983 |
| Alexandra Mews (Ormskirk) Limited | Households | 1993 |
| Alexandra Place Flat Management (Southport) Limited | Households | 2003 |
| Alexandra Road Flats Company Ltd | Households | 2019 |
| Alexandra Road Southport (Management Company) Limited | Households | 1999 |
| Alexandra Wilde Ltd | Wholesale & retail | 2018 |
| Alexandria Events Limited | Other services | 2014 |
| Alfros Property Ltd | Real estate | 2025 |
| Alis One Barber Ltd | Other services | 2025 |
| Alison Appleton Limited | Professional & scientific | 2011 |
| Alison Paul Designs Limited | Administrative & support | 2008 |
| Alker Transport Ltd | Transport & logistics | 2019 |
| ALL Day Holdings Limited | Real estate | 2015 |
| ALL Day Long (ADL) Limited | Construction | 2019 |
| ALL Greek Eats Limited | Wholesale & retail | 2017 |
| ALL Sorted Financial Planning Limited | Financial services | 2016 |
| ALL Sorted Mortgages Limited | Financial services | 2023 |
| ALL Things Mobile Ltd | Wholesale & retail | 2009 |
| ALL Walks of Life Limited | Health & social care | 2015 |
| ALL World Pharmaceuticals Ltd | Manufacturing | 2025 |
| Alliance Alternative Education CIC | Education | 2023 |
| Alltogether Animal Assisted Therapy and Learning CIC | Health & social care | 2014 |
| Allucrum Ltd | Professional & scientific | 2017 |
| Almorah Industrial Services Limited | Wholesale & retail | 1980 |
| ALO Property Management Ltd | Real estate | 2019 |
| Aloko Empire Ltd | Real estate | 2024 |
| Aloko Holdings Ltd | Financial services | 2024 |
| Aloko Investments Limited | Real estate | 2023 |
| Aloko Lands Ltd | Real estate | 2024 |
| Alpha Business Products Limited | Wholesale & retail | 2007 |
| Alpha Climate Systems Ltd | Energy | 2026 |
| Alpha Law Costs Ltd | Professional & scientific | 2018 |
| Alpha Papa Ltd | Transport & logistics | 2018 |
| Alpha Wood Flooring Ltd | Construction | 2022 |
| Alton Pump Services Ltd | Professional & scientific | 2018 |
| Alton Station Cafe Limited | Hospitality | 2017 |
| Alty's Properties Limited | Real estate | 2021 |
| Alux Ltd. | Health & social care | 2013 |
| Alwaysbeseen Ltd | Information & communication | 2008 |
| AM Real Logic Ltd | Information & communication | 2026 |
| Amandor Holdings Ltd | Real estate | 2021 |
| Amazing Retail Ltd | Wholesale & retail | 2021 |
| Amazingface Limited | Wholesale & retail | 2007 |
| AMB Commercial Limited | Real estate | 2021 |