| Agricultural Discoveries (U.K.) Limited | | 1983 |
| Agricultural Machinery (Nantwich) Limited | Wholesale & retail | 1951 |
| AGT International Limited | Manufacturing | 2003 |
| Air Balancing Commissioning Services Limited | Energy | 1989 |
| Airtime Communications (Cheshire) Limited | Professional & scientific | 2003 |
| AJE Worldwide Limited | Administrative & support | 2004 |
| AJJ Films Ltd | Information & communication | 2007 |
| AJM Leisure Limited | Arts & recreation | 2006 |
| Al-Ghanni Ltd | Health & social care | 2021 |
| Alan Reece Motors Limited | Wholesale & retail | 2002 |
| Albex Residential Property Management Limited | Real estate | 2005 |
| Albion House Maintenance Ltd | Other services | 2007 |
| Alcam Services Limited | Manufacturing | 1999 |
| Alderley Payroll Services Limited | Professional & scientific | 2006 |
| Alectrics Limited | Construction | 2005 |
| Aleef Investments Limited | Real estate | 2024 |
| Alexander Hodgin Joinery Limited | Construction | 2005 |
| Alexander Probin Limited | Professional & scientific | 2006 |
| Alexandra Mccann Limited | Health & social care | 2003 |
| Alexeron Associates Limited | Other services | 1994 |
| Alford Contract Management Ltd | Professional & scientific | 2025 |
| ALL Electrics Wirral Limited | Construction | 2003 |
| ALL Tite Roofing Limited | Administrative & support | 2007 |
| Allbarnone Bloodstocks Limited | Agriculture & fishing | 2007 |
| Allen Industrial Roofing Limited | Construction | 2000 |
| Allen Windows & Conservatories Limited | Construction | 2004 |
| Allens Accountants Ltd. | Professional & scientific | 2002 |
| Alpha Omega Resources Ltd. | Education | 1992 |
| Alphamenscircle Ltd | Other services | 2023 |
| Alphas Swim School LLP | | 2025 |
| Alrv Unitco Limited | Real estate | 2022 |
| Altrincham Garrick Playhouse,Limited | Arts & recreation | 1931 |
| Altrincham Tyre & Exhausts Limited | Wholesale & retail | 1977 |
| Altrye Partners Limited | Information & communication | 2017 |
| ALU MAX Doors Ltd | Construction | 2024 |
| AM Jennings Limited | Administrative & support | 2008 |
| Amalyz Limited | Real estate | 2025 |
| AMB Recruitment (North) Limited | Administrative & support | 2020 |
| Ambitactivate Ltd | Information & communication | 2003 |
| Ambrose Ellis Painting Contractors Limited | Construction | 2002 |
| Amec Trustees Limited | Financial services | 1993 |
| AMH Financial Ltd | Financial services | 2015 |
| AMJ Quality Consultant Limited | Professional & scientific | 2017 |
| AMK Electrical Engineering Limited | Construction | 2019 |
| Ammonite Technology Limited | Information & communication | 1997 |
| AMR Pipelines Limited | Extraterritorial | 1994 |
| Analytech Limited | Information & communication | 1994 |
| Ancarise Limited | Financial services | 1986 |
| Andrea Mckay & Associates Limited | Health & social care | 2006 |
| Andrew David-Brown Ltd | Other services | 2025 |
| Andrew Keating Plumbing & Heating Limited | Construction | 2006 |
| Andrew Mclaughlin Associates Limited | Professional & scientific | 1991 |
| Andrew Paterson Photography Limited | Professional & scientific | 2002 |
| Andrew Thomas Theatricals Limited | Arts & recreation | 1988 |
| Andrews Auto Repairs Co Ltd | Wholesale & retail | 2005 |
| Andy Cobley Limited | Construction | 2002 |
| Andy Harmer Limited | Professional & scientific | 2006 |
| Andy Mott Limited | Professional & scientific | 2005 |
| Anson Museum Trust Limited | Arts & recreation | 1987 |
| Apex Shopfitting & Joinery Limited | Administrative & support | 2005 |
| Apex Technology Ltd | Information & communication | 2003 |
| Apothecaring Ltd | Information & communication | 2006 |
| Aqua Logistics Limited | Wholesale & retail | 1999 |
| ARC Electric (Electrical Contractors) Limited | Construction | 1996 |
| Archers (Bakers & Confectioners) Limited | Manufacturing | 1975 |
| Arena Communications (Northwest) Limited | Professional & scientific | 2005 |
| Ariadne Software Holdings Limited | Financial services | 2020 |
| Ariel Flight Services Limited | Transport & logistics | 2007 |
| Aries Technology Limited | Information & communication | 2002 |
| Arighi Bianchi & Co.Limited | Wholesale & retail | 1900 |
| Aristo-Tots Private Nursery School Limited | Administrative & support | 2000 |
| ARK Garden Maintenance Services Limited | Construction | 2020 |
| Arkay Consultancy Ltd | Professional & scientific | 2017 |
| Armadillos CAN Salsa Limited | Real estate | 2003 |
| Arminius Partners Ltd | Other services | 2020 |
| Armitage Technical Design Services Limited | Professional & scientific | 2007 |
| Arrowe Limited | Other services | 2007 |
| Art House Creative Interiors Limited | Wholesale & retail | 2004 |
| Arte Peru Limited | Wholesale & retail | 2002 |
| Arthur Chatwin Limited | Manufacturing | 1962 |
| Arthur GOW Limited | Professional & scientific | 2003 |
| Arthur Schofield & SON Construction Limited | Construction | 1975 |
| Arthur V Crutchley & Co Limited | Transport & logistics | 1994 |
| Arthur Wright Farms Limited | Agriculture & fishing | 1955 |
| Arystotle Limited | Administrative & support | 2001 |
| AS Air Suspension UK Limited | Wholesale & retail | 2007 |
| Ascendant Accounting Limited | Professional & scientific | 2003 |
| Asco Lights Ltd | Wholesale & retail | 2007 |
| Ascon Investments Ltd | Real estate | 2003 |
| ASH Skip Hire Limited | Construction | 2002 |
| Ashbourne Business Centres Ltd | Administrative & support | 2001 |
| Ashbrooks (House Furnishers) Limited | Wholesale & retail | 1930 |
| Ashton Wall Ties Limited | Construction | 2011 |
| Ashtree Landscapes Limited | Construction | 2001 |
| Ashtree Services (Garden & Grounds Maintenance) Limited | Other services | 2000 |
| Aspect 3 Limited | Other services | 1999 |
| Associated GAS Limited | Construction | 2003 |
| Aston & Co. Ltd | Wholesale & retail | 2025 |
| Astute Music Limited | Manufacturing | 2003 |
| AT Kinetics Limited | Manufacturing | 2003 |