| Abbey & Lyndon Builders Ltd | Construction | 2010 |
| Abbey Clamps Ltd | Professional & scientific | 2009 |
| Abbeydale Social Club Ltd | Hospitality | 2023 |
| Abbeydale Sports and Social Club CIC | Hospitality | 2023 |
| Abbeywood Events Ltd | Education | 2022 |
| ABC Building Development Ltd | Administrative & support | 2017 |
| ABH International Ltd | Wholesale & retail | 2025 |
| Abhm Limited | Administrative & support | 2018 |
| Abingdon Plumbing and Heating Ltd | Construction | 2024 |
| Abjw Property Ltd | Real estate | 2025 |
| Above and Beyond Public Relations Limited | Professional & scientific | 2013 |
| Absolute Building Services (Midlands) Ltd | Construction | 2021 |
| Absolute Delivery Limited | Transport & logistics | 2024 |
| AC Counts & Services Ltd | Professional & scientific | 2012 |
| AC Transs Ltd | Transport & logistics | 2025 |
| Acas Consultants Ltd | Professional & scientific | 2019 |
| Acbprop.Co.Uk Ltd | Construction | 2020 |
| Accalia Care Services Ltd | Health & social care | 2013 |
| Access Hardware Limited | Wholesale & retail | 1985 |
| Access Window Cleaning Limited | Administrative & support | 2016 |
| Accountancy 4 Healthcare Ltd | Professional & scientific | 2024 |
| Accounts Help Limited | Professional & scientific | 1999 |
| Accountscom Limited | Financial services | 2014 |
| Accurate Cutting Services Limited | Professional & scientific | 1969 |
| Ace Insurance Services Group Limited | Financial services | 2016 |
| Ace LGV Midlands Ltd | Transport & logistics | 2016 |
| Ace Mini Buses Coaches Ltd Limited | Transport & logistics | 2025 |
| Ace of Trades FX Ltd | Education | 2025 |
| Acol Court Limited | Households | 1983 |
| Acomz Networks Limited | Extraterritorial | 2003 |
| Acorda Limited | Construction | 2016 |
| Acorn Environmental Management Group Limited | Agriculture & fishing | 2000 |
| Acorn Retail Promotions Limited | Administrative & support | 2024 |
| Acorn TP Holdco Limited | Financial services | 2021 |
| Acorn Trade Partners Limited | Hospitality | 2016 |
| ACP Ventures Limited | Financial services | 2014 |
| Acrm Group Ltd | Wholesale & retail | 2026 |
| ACS Partition Solutions Limited | Construction | 2012 |
| ACS Pro Solutions Ltd | Health & social care | 2023 |
| ACT Coaching and Training Limited | Information & communication | 2025 |
| Action Graphics & Display Ltd | Manufacturing | 2019 |
| Action HR Limited | Professional & scientific | 2004 |
| ACTIV8 Intelligence Limited | Information & communication | 2005 |
| Active Data Management Limited | Information & communication | 1998 |
| Active Silicon Limited | Manufacturing | 1988 |
| Active Springs Studley Ltd | Manufacturing | 2022 |
| Adam Classic Barber Ltd | Other services | 2020 |
| Adams Creative Limited | Information & communication | 2026 |
| Adapt Removals & Storage Ltd | Transport & logistics | 2020 |
| Adbart Logistics Ltd | Transport & logistics | 2019 |
| ADD Professional Services Limited | Information & communication | 2014 |
| ADG Sweepz Limited | Administrative & support | 2025 |
| Adjuvo Digital Ltd | Information & communication | 2021 |
| Adjuvo Group Limited | Professional & scientific | 2011 |
| Adkin Hardy LLP | | 2005 |
| ADM Global Ltd | Wholesale & retail | 2018 |
| Advance Improvement Limited | Administrative & support | 2026 |
| Advanced Computer Furniture Limited | Real estate | 1990 |
| Advanced DEC Midlands Limited | Construction | 2010 |
| Advanced Engineering Solutions (JD) Limited | Manufacturing | 2001 |
| Advanced Heating & Plumbing Services Limited | Construction | 2003 |
| Advanced Individual Training Limited | Administrative & support | 2007 |
| Advanced Lettings Limited | Financial services | 2023 |
| Advanced Metal Products Limited | Manufacturing | 2013 |
| Advanced Property Plus Limited | Real estate | 2017 |
| Advanced Threat Group Limited | Information & communication | 2022 |
| Advantage 1 Limited | Administrative & support | 2000 |
| Adventure Awaits Day Nursery Ltd | Health & social care | 2019 |
| Adventure Freedom Campers Limited | Hospitality | 2026 |
| Adventure.Amore Ltd | Professional & scientific | 2024 |
| Adviser Connect Limited | Professional & scientific | 2026 |
| Advita Ortho UK Limited | Manufacturing | 2004 |
| Adwizz Limited | Administrative & support | 2022 |
| AE Motorz Repairs Ltd | Wholesale & retail | 2025 |
| Aegis Group Holdings Limited | Construction | 2020 |
| AER Automotive Limited | Administrative & support | 2021 |
| Aeris Employment Law Ltd | Professional & scientific | 2013 |
| Aero-Hybrid Dynamics Ltd | Professional & scientific | 2025 |
| Aerostat Management Limited | Professional & scientific | 2010 |
| AES Architectural Limited | Real estate | 2015 |
| AEW Midlands Limited | Wholesale & retail | 2013 |
| AF Motorsport Ltd | Arts & recreation | 2020 |
| Affordable Storage (Redditch) Ltd | Administrative & support | 2021 |
| Affordable Taxi Solutions Limited | Transport & logistics | 2024 |
| AFG Holdco Ltd | Financial services | 2022 |
| Afrikico Grill Bar and Restaurant Limited | Hospitality | 2026 |
| Afropolitan Limited | Arts & recreation | 2021 |
| AG Tech Solutions Ltd | Wholesale & retail | 2025 |
| AGB Investment Letting Ltd | Real estate | 2022 |
| Agencygrand Ltd | Professional & scientific | 2022 |
| Agirtas Ltd | Hospitality | 2019 |
| AGM Holdings (UK) Ltd | Real estate | 2013 |
| AGM Property Development Limited | Real estate | 2016 |
| Agnes Aghnessi Merged Sodality (Earthly HQ) Social Enterprise Limited | Transport & logistics | 2025 |
| Ahdc Engineering Ltd | Professional & scientific | 2013 |
| Ahead of Wellbeing Community Interest Company | Health & social care | 2019 |
| Ahha Publications Limited | Extraterritorial | 2010 |
| Ahmed ALI Property Ltd | Real estate | 2025 |
| Aiconsultory Ltd | Information & communication | 2025 |
| Aidan Logistic Limited | Transport & logistics | 2025 |