| Albion Garages (New Brighton) Limited | Transport & logistics | 1964 |
| Albion Medicines Management Ltd | Health & social care | 2015 |
| Albiston Asset Management Ltd | Real estate | 2023 |
| Alderley Management Company Limited | Administrative & support | 1987 |
| Alesca Living Ltd | Real estate | 2025 |
| ALL 4114 ALL Ltd | Administrative & support | 2024 |
| ALL About US AP Limited | Education | 2026 |
| ALL DOT Ltd | Information & communication | 2025 |
| ALL Trades an Sons Ltd | Administrative & support | 2017 |
| All-Souls Headstones and Memorial Restorations Ltd | Other services | 2026 |
| Allen Engineering Solutions Limited | Wholesale & retail | 2011 |
| Allied Campuses Ltd | Education | 2023 |
| Allied Hackneys of Wallasey Limited | Transport & logistics | 2009 |
| Allsorts Management Group Ltd | Real estate | 2017 |
| Alltyperoofingandbuildingcontractors Ltd | Construction | 2025 |
| Almek Limited | Construction | 2013 |
| Alta EGO Hair Ltd | Wholesale & retail | 2020 |
| Alterean Media Limited | Arts & recreation | 2013 |
| Altitude Comedy Festival Limited | Arts & recreation | 2019 |
| Altitude Roofing Services Limited | Construction | 2011 |
| ALX Building Services Ltd | Administrative & support | 2025 |
| AM Services Liverpool Ltd | Administrative & support | 2026 |
| Amali News Limited | Wholesale & retail | 2024 |
| Amara Restaurant Wallasey Limited | Hospitality | 2025 |
| AMC Health & Safety Consultants Ltd. | Professional & scientific | 2016 |
| AMG Heating Ltd | Construction | 2021 |
| AMN International UK Limited | Wholesale & retail | 2022 |
| AMP Kitchens Ltd | Hospitality | 2025 |
| Amy's Cakes Ltd | Manufacturing | 2012 |
| Analytica Quality Solutions Ltd | Professional & scientific | 2025 |
| Andrew David Consultants Limited | Administrative & support | 2013 |
| Andrew Simmonds Consulting Limited | Professional & scientific | 2014 |
| Andrew Smith Architects Limited | Extraterritorial | 1996 |
| Andriy Zorin Ltd | Transport & logistics | 2025 |
| Andromena Limited | Other services | 2025 |
| Andy Mcgreal Plant Hire Limited | Administrative & support | 2010 |
| Andy Mumford Roofing Services Ltd | Construction | 2023 |
| Andy Thorne Gardens Ltd | Administrative & support | 2010 |
| Andy's Cafe Limited | Hospitality | 2025 |
| Andysnest Properties Ltd | Real estate | 2026 |
| Angel Tech Limited | Information & communication | 2016 |
| Angels Care Management Services Limited | Health & social care | 2010 |
| Anima Therapies Limited | Health & social care | 2021 |
| Ann-Louise Gilmore Consultancy Ltd | Construction | 2018 |
| Anna Letitia Cook Limited | Administrative & support | 2014 |
| Anne Roberts Oxton Limited | Other services | 2014 |
| Anthem City Ltd | Hospitality | 2024 |
| Antona (2008) LLP | | 2008 |
| AP Machinery & Hire Limited | Professional & scientific | 2014 |
| Apan Property Services Ltd | Real estate | 2026 |
| Apan Retail Ltd | Wholesale & retail | 2025 |
| Apex EV Ltd | Construction | 2026 |
| Apex Water Services Ltd | Construction | 2026 |
| APH Accountants Ltd | Professional & scientific | 2010 |
| APN Rail Services Ltd | Construction | 2018 |
| Apollo Conveyor Solutions Ltd | Manufacturing | 2021 |
| Apollo Music Wirral Ltd | Other services | 2019 |
| Apple Blossom Court Ltd | Health & social care | 2011 |
| Apple Blossom Lodge Ltd | Health & social care | 2001 |
| Applebys Farm Limited | Agriculture & fishing | 2021 |
| Apps DJ Ltd | Information & communication | 2012 |
| Aquamate Limited | Water & waste | 2020 |
| Aquila U.K. Limited | Administrative & support | 1997 |
| Arch Weight Ltd | Manufacturing | 2026 |
| Archana Consultancy Limited | Education | 2025 |
| Arenal Limited | Professional & scientific | 2013 |
| Arlington 97 Properties Ltd | Real estate | 2022 |
| Arno Court(Management)Co.Limited | Households | 1962 |
| Arnwood Properties Limited | Administrative & support | 2002 |
| Arrowband Limited | Construction | 1988 |
| Arrowe Brook Court Management Company Limited | Households | 1996 |
| Arrowebrook Fire Solutions Ltd | Other services | 2003 |
| Artemis Properties Ltd. | Real estate | 2014 |
| AS Services Upvc Replacement Specialists Limited | Construction | 2014 |
| Asana-Homes Limited | Construction | 2025 |
| Asap Sports Limited | Wholesale & retail | 2026 |
| Asbestosenviromental Ltd | Construction | 2025 |
| Ashport Group Limited | Professional & scientific | 2026 |
| Ashton Properties Wirral Limited | | 1991 |
| Asset English Ltd | Education | 2020 |
| Astley Consultancy (NO. 2) Ltd. | Financial services | 2017 |
| Astley Consultancy Limited | Professional & scientific | 1995 |
| ATB Electrical Ltd | Construction | 2016 |
| Athenyx Holdings Limited | Wholesale & retail | 2025 |
| Atherton House Management Company Limited | Households | 2008 |
| Atlantic Care Services Limited | Administrative & support | 2020 |
| Atlas & Cosmos Ltd. | Information & communication | 2016 |
| Atlas HR Solutions Ltd | Administrative & support | 2022 |
| ATS Private Hire Ltd | Transport & logistics | 2025 |
| Aubree Electrical Ltd | Construction | 2018 |
| Auto Spray (Wirral) Ltd | Wholesale & retail | 2022 |
| AW Residential Care Ltd | Health & social care | 2022 |
| Awakened Spirit CIC | Health & social care | 2026 |
| B Greenham Ltd | Professional & scientific | 2014 |
| B&L Builders NW Ltd | Construction | 2025 |
| B2C Consulting Limited | Professional & scientific | 2025 |
| Baakery Barn Limited | Hospitality | 2026 |
| Babylon Fresh Foods Superstore Ltd | Wholesale & retail | 2021 |
| Backrooms Events Ltd | Administrative & support | 2025 |
| Bailey & Birch Electrical Services Limited | Construction | 2010 |