| A1 Maintenance Ltd | Construction | 2025 |
| A1 Plumbing & Heating Services (Tamworth) Limited | Extraterritorial | 2008 |
| A1 Removals National Ltd | Transport & logistics | 2022 |
| A1B2C3 Limited | Administrative & support | 2022 |
| A2B Entertainment Ltd | Arts & recreation | 2021 |
| A2O Homes Limited | Construction | 2017 |
| A2Z Interiors Ltd | Construction | 2021 |
| A2Z UK Builders Ltd | Construction | 2015 |
| A2Z UK Constructions Ltd | Construction | 2024 |
| A5 Properties (Midlands) Limited | Real estate | 2022 |
| AA & ME Properties Ltd | Real estate | 2025 |
| AA Platina Cleaning Limited | Administrative & support | 2025 |
| AAA Plant Limited | Real estate | 2013 |
| AAC Group Holdings Limited | Financial services | 2022 |
| AAC Spectrum Limited | Professional & scientific | 1999 |
| Aaradhya Retail Ltd | Wholesale & retail | 2025 |
| Aathi Stores PVT Ltd | Wholesale & retail | 2023 |
| Aazz Ltd | Information & communication | 2018 |
| Abacus Professions Finance Ltd | Financial services | 2018 |
| Abbess Consulting Ltd | Professional & scientific | 2020 |
| Abbey Court (Polesworth) Limited | Hospitality | 2015 |
| Abdul Matin Azizi Aesthetics Ltd | Health & social care | 2019 |
| Abdul's Restaurant Ltd | Hospitality | 2025 |
| Abel 18 Ltd | Wholesale & retail | 2022 |
| Aboyne Mews Management Limited | Households | 1985 |
| ABS Computers (Tamworth) Limited | Other services | 2025 |
| Absolute Finger Limited | Real estate | 2014 |
| Absolute Heating (Midlands) Limited | Construction | 2014 |
| Absolutely Flab-U-Less Ltd | Other services | 2018 |
| AC Automotive Electrical Limited | Extraterritorial | 2019 |
| AC HAS Ltd | Administrative & support | 2014 |
| AC Property Management Ltd | Real estate | 2020 |
| AC3D Bespoke Panelling Ltd | Manufacturing | 2022 |
| Academy Advisory Limited | Professional & scientific | 2014 |
| Academy of Beauticians and Aesthetics Ltd | Extraterritorial | 2019 |
| Access Chemicals Limited | Manufacturing | 1994 |
| Acclaro Medical Ltd | Wholesale & retail | 2025 |
| Accountativ Advisors Limited | Professional & scientific | 2025 |
| Accountext Publishing Ltd | Information & communication | 2023 |
| Ace Aero Taxis Limited | Transport & logistics | 2014 |
| Ace Building Services (WM) Ltd | Construction | 2017 |
| Ace Childminding T/A Ace Nursery Ltd | Health & social care | 2022 |
| Ace Consumer Healthcare Limited | Other services | 2004 |
| Ace Group Academy Ltd | Education | 2024 |
| Ace Group Ltd. | Health & social care | 2016 |
| Ace Group World Ltd | Health & social care | 2019 |
| Ace Holdings (Tamworth) Limited | Professional & scientific | 2008 |
| Acerscapes Ltd | Administrative & support | 2020 |
| ACH Composites Ltd | Manufacturing | 2025 |
| Achieve Sports Academy Ltd | Education | 2025 |
| Acmn Limited | Education | 2018 |
| ACN Motor Vehicle Solutions Ltd | Wholesale & retail | 2025 |
| ACN Motors Ltd | Wholesale & retail | 2023 |
| Aconveyancing Limited | Professional & scientific | 2013 |
| Acorn Taxis Limited | Transport & logistics | 2010 |
| Acrd&B Ltd | Construction | 2026 |
| Acre Packaging Supplies Limited | Wholesale & retail | 1983 |
| ACT Air-Conditioning Ltd | Construction | 2025 |
| Activated Oxygen Limited | Manufacturing | 2000 |
| Activkey Systems Ltd | Wholesale & retail | 2025 |
| Activology C.I.C. | Health & social care | 2018 |
| Acusu Ltd | Information & communication | 2013 |
| Acuwomen Limited | Professional & scientific | 2004 |
| Acwarb Ltd | Agriculture & fishing | 2024 |
| AD Car Body Repair Ltd | Wholesale & retail | 2024 |
| Adam and the Amps Ltd | Construction | 2019 |
| Adam Bicknell Creative Limited | Professional & scientific | 2017 |
| Adams Electrical Tamworth Ltd | Construction | 2022 |
| Adams Moore (Sutton Coldfield) Limited | Professional & scientific | 2017 |
| Adams Moore Audit Ltd | Professional & scientific | 2002 |
| Adams Moore Capital Ltd | Health & social care | 2023 |
| Adams Moore Holdings Ltd | Financial services | 2005 |
| Adams Moore Investments Limited | Real estate | 2021 |
| Adams Moore Limited | Professional & scientific | 2003 |
| Adams Software Ltd | Information & communication | 2019 |
| Adana Security Limited | Administrative & support | 2020 |
| Adapt Plant Repairs Limited | Manufacturing | 2024 |
| Adaptive Minds Provision Limited | Education | 2026 |
| Adara Wargaming Limited | Other services | 2025 |
| ADC Estates Limited | Real estate | 2025 |
| Adele Faye Beauty Studio Ltd | Other services | 2020 |
| Adept Cleaning Services Limited | Administrative & support | 1995 |
| Aditi Safety Training Ltd | Public administration | 2017 |
| Adnan International Ltd | Transport & logistics | 2018 |
| Adonis Park Property Ltd | Real estate | 2021 |
| Adore Your Floor UK Limited | Wholesale & retail | 2026 |
| Adrian Vasile Limited | Transport & logistics | 2021 |
| Aduta Management Ltd | Transport & logistics | 2019 |
| Advance Automation Ltd | Professional & scientific | 2010 |
| Advanced BMS Ltd | Manufacturing | 2022 |
| Advanced Contractors Ltd | Construction | 2025 |
| Advanced Denture Solutions Limited | Health & social care | 2024 |
| Advanced Engineering (UK) Limited | Manufacturing | 1978 |
| Advanced Industrial Engineering Limited | Manufacturing | 2015 |
| Advanced Personnel Systems Ltd | Information & communication | 1996 |
| Advanced Windows (Midlands) Ltd | Manufacturing | 2005 |
| Advantage Construction Group Ltd | Construction | 2018 |
| AE UK Holdings Limited | Financial services | 2017 |
| Aesthetic Beauty by Jules Ltd | Other services | 2021 |
| AF Academy Ltd | Education | 2021 |