| Access to Business | Administrative & support | 2004 |
| Accessible Digital Online Ltd | Information & communication | 2026 |
| Accho Limited | Health & social care | 2010 |
| Acci-Dents PDR Limited | Wholesale & retail | 2011 |
| Accord Homes Limited | Real estate | 2022 |
| Accountability GPT Ltd | Information & communication | 2026 |
| Accounting Consultancy Services Ltd | Financial services | 2017 |
| Accounting World Limited | Professional & scientific | 2016 |
| Accounts & Taxation Compliance Group Ltd | Professional & scientific | 2026 |
| Accounts Monkey Ltd | Professional & scientific | 2019 |
| Accuman Consulting Limited | Administrative & support | 2015 |
| Accura DPM Ltd | Professional & scientific | 2015 |
| Accuraterecords Ltd | Professional & scientific | 2021 |
| Acdps Holdings Limited | Financial services | 2018 |
| Acdyon Technologies Ltd | Information & communication | 2026 |
| Ace Autoz Ltd | Wholesale & retail | 2023 |
| Ace Computer Support (West Mids) Limited | Information & communication | 2008 |
| Ace D&H Consultants Limited | Administrative & support | 2021 |
| Ace Electrical (Wolverhampton) Ltd | Other services | 2010 |
| Ace Electrical Training Limited | Education | 2018 |
| Ace Forming Limited | Manufacturing | 2003 |
| Ace Fulfilment Services Ltd | Transport & logistics | 2025 |
| Ace of Builds Limited | Construction | 2019 |
| Ace of Cardz Ltd | Wholesale & retail | 2018 |
| Ace Properties INV Ltd | Real estate | 2019 |
| Ace Rail Ltd | Construction | 2025 |
| Acenote Ltd | Administrative & support | 1995 |
| Acentus Solutions Ltd | Information & communication | 2017 |
| Acer Horticultural Services Limited | Wholesale & retail | 2015 |
| ACEWORK1 Ltd | Construction | 2024 |
| ACH Cons Ltd | Construction | 2015 |
| ACH GAS & Plumbing Ltd | Construction | 2026 |
| Acha Multipurpose Ltd | Professional & scientific | 2018 |
| Acifin Limited | Information & communication | 2013 |
| ACJ Property & Development Ltd | Real estate | 2020 |
| ACJ Research Ltd | Professional & scientific | 2012 |
| Ackerman Pierce Payroll Ltd | Administrative & support | 2026 |
| ACM Auto Service Ltd | Wholesale & retail | 2020 |
| Acme Soft Limited | Information & communication | 2010 |
| Acomms Tech Solutions Limited | Information & communication | 2020 |
| Acorn Freight Services Ltd | Transport & logistics | 2018 |
| Acorn Residential Care Ltd | Health & social care | 2014 |
| Acoustics Environment Limited | Professional & scientific | 2019 |
| Acquaproof Roofing Limited | Construction | 2023 |
| Acres Property Limited | Real estate | 2017 |
| ACT Builders Ltd | Construction | 2025 |
| Acticore Ltd | Professional & scientific | 2025 |
| Action Chain Ltd | Wholesale & retail | 2023 |
| Action Staffing Ltd | Administrative & support | 2025 |
| Activ Storage Limited | Administrative & support | 2005 |
| Active Cleaning Services of Shropshire Limited | Administrative & support | 2008 |
| Active Distributions Ltd | Wholesale & retail | 2025 |
| Active Driver Ltd | Administrative & support | 2019 |
| Active Edge Airsports Ltd | Education | 2026 |
| Active Edge Equipment Ltd | Wholesale & retail | 2026 |
| Active Fixings Ltd | Professional & scientific | 2019 |
| Active Glass and Mirrors Ltd | Construction | 2019 |
| Active Plumbing & Heating Services Wolverhampton Ltd | Construction | 2018 |
| Active Security Solutions Limited | Public administration | 2008 |
| Active Shots Ltd | Health & social care | 2019 |
| Active Tax Ltd | Professional & scientific | 2021 |
| Active Therapy Limited | Health & social care | 2012 |
| Active UK Security Limited | Manufacturing | 2015 |
| Activeuk Ltd | Construction | 2025 |
| Activitee Ltd | Education | 2025 |
| Activo Care Maintenance Limted Limited | Construction | 2025 |
| Actmar Ltd | Other services | 2019 |
| Acton Banks Home Care Ltd | Health & social care | 2020 |
| Acton Banks Limited | Administrative & support | 2006 |
| Acton Gate Systems Limited | Information & communication | 2001 |
| Acts of Random Caring Community Interest Company | Education | 2015 |
| Actual Hire Ltd | Information & communication | 2025 |
| Acumen Property Consultants Ltd | Professional & scientific | 2025 |
| Acure Limited | Professional & scientific | 2018 |
| Acute Medico Ltd | Health & social care | 2025 |
| AD Manufacturing Ltd | Manufacturing | 2023 |
| AD Subs Ltd | Hospitality | 2020 |
| Adaadi Services Limited | Professional & scientific | 2014 |
| Adab Homes Ltd | Real estate | 2024 |
| Adadzewa Services Limited | Health & social care | 2020 |
| Adaever Limited | Administrative & support | 2016 |
| Adagaz Global Limited | Construction | 2025 |
| Adam a Dent Ltd | Health & social care | 2025 |
| Adam and Haider Limited | Construction | 2017 |
| Adam and Haider West Midlands Limited | Real estate | 2017 |
| Adam Bakery Ltd | Manufacturing | 2020 |
| Adam Binder Editions Limited | Arts & recreation | 2001 |
| Adam Burgess Ltd | Arts & recreation | 2020 |
| Adam Carter Limited | Other services | 2002 |
| Adam Jones Stonemasons Ltd | Manufacturing | 2018 |
| Adam Studio Ltd | Professional & scientific | 2025 |
| Adamm Motors Ltd | Wholesale & retail | 2020 |
| Adams Defence Solicitors Ltd | Professional & scientific | 2024 |
| Adams Executive Travel Limited | Wholesale & retail | 2014 |
| Adams Lock & Maintenance Ltd | Manufacturing | 2025 |
| Adamsagir Limited | Real estate | 2026 |
| Adanse Enterprise Limited | Wholesale & retail | 2024 |
| Adaptdance Limited | Health & social care | 1996 |
| Adapted Toys Ltd | Wholesale & retail | 2023 |
| Adbzk Ltd | Professional & scientific | 2021 |