| AA Logistics Birmingham Ltd | Transport & logistics | 2015 |
| AA Turmeric Ltd | Wholesale & retail | 2022 |
| AAE Creative Business Ltd | Administrative & support | 2025 |
| Aahigginsretail Ltd | Construction | 2025 |
| AAV Marketing Ltd | Other services | 2023 |
| AB GAS & Property Service Ltd | Construction | 2020 |
| AB GAS and Plumbing Ltd | Construction | 2025 |
| AB GAS and Property Management Ltd | Real estate | 2023 |
| Ab&J Investments Limited | Real estate | 2020 |
| ABB Solutions Ltd | Construction | 2020 |
| Abbas Ahmed Consultancy Ltd | Information & communication | 2026 |
| Abbey Delight Limited | Hospitality | 2023 |
| ABBI2 Foods Ltd | Hospitality | 2025 |
| ABC Locums Ltd | Health & social care | 2016 |
| Abcdcourier Ltd | Transport & logistics | 2026 |
| Abdurrazaq Baba Foundation Ltd | Education | 2025 |
| Aberdeen Solutions Ltd | Information & communication | 2020 |
| Abhishek Pandeya Limited | Other services | 2020 |
| Abla Unique African Style Ltd | Transport & logistics | 2012 |
| Abri Silburn Ltd | Other services | 2024 |
| ABS Impex Trading UK Ltd | Wholesale & retail | 2025 |
| ABS12 Ltd | Hospitality | 2020 |
| Absolute Cleanzone Ltd | Administrative & support | 2020 |
| Absolute Steel Framing Limited | Extraterritorial | 2018 |
| AC Academy CIC | Education | 2025 |
| AC Staffing and Recruitment Ltd | Administrative & support | 2024 |
| Access 2 Education Ltd | Administrative & support | 2025 |
| Accident Repair Storage Group Ltd | Wholesale & retail | 2023 |
| Accordial Holdings Limited | Financial services | 2021 |
| Ace Autohouse Ltd | Wholesale & retail | 2025 |
| Ace Slitting Service Ltd | Manufacturing | 2019 |
| ACG Motor Sales Ltd | Wholesale & retail | 2025 |
| Achieve Communication Limited | Education | 2017 |
| Achieve Tuition Ltd | Education | 2025 |
| Acrum Holdings Limited | Real estate | 2025 |
| ACS Couriers and Logistics Ltd | Transport & logistics | 2019 |
| Action Aces Limited | Administrative & support | 2024 |
| Action Fire and Security Ltd | Administrative & support | 2023 |
| Acton & Lloyds Limited | Wholesale & retail | 2020 |
| Acupuncture and Herbs Clinic Ltd | Public administration | 2026 |
| AD Care Ltd | Health & social care | 2019 |
| AD Data Technologies Limited | Information & communication | 2025 |
| AD Tractor Ltd | Transport & logistics | 2019 |
| Adage Models & Promotions Agency Ltd | Professional & scientific | 2016 |
| Adage Retail Ltd | Wholesale & retail | 2016 |
| Adalid Solutions Limited | Professional & scientific | 2004 |
| Adam Bodyshop Ltd | Wholesale & retail | 2021 |
| Adam Mini Market 1 Ltd | Wholesale & retail | 2025 |
| Adam Ridley LLP | | 2013 |
| Adam Sajid Halal Poultry Limited | Wholesale & retail | 2020 |
| Adam Tyres Ltd | Wholesale & retail | 2020 |
| Adaptable Travel (Holdings) Ltd | Financial services | 2024 |
| Adaptable Travel Limited | Administrative & support | 1994 |
| Adara Hair and Beauty Therapy Limited | Other services | 2017 |
| Adcbttherapy Ltd | Health & social care | 2021 |
| Adderley Repair Ltd | Construction | 2022 |
| ADE Crown Ventures Ltd | Administrative & support | 2018 |
| Adegrace Healthcare Services Limited | Real estate | 2024 |
| Adisam Limited | Wholesale & retail | 2019 |
| ADK Properties HM Ltd | Real estate | 2025 |
| Admele Properties Limited | Real estate | 2021 |
| Adore Modest Wear Ltd | Wholesale & retail | 2025 |
| Adotgames Ltd | Information & communication | 2022 |
| Adrian Automotive Limited | Wholesale & retail | 2016 |
| ADS & Sons Glazing Limited | Manufacturing | 2015 |
| ADS & Sons Properties Ltd | Real estate | 2025 |
| Advance Window Systems Limited | Construction | 2004 |
| Advanced Stock Solutions Ltd | Extraterritorial | 2017 |
| Advantage Environmental Services Limited | Professional & scientific | 2004 |
| Adzenture Ltd | Other services | 2021 |
| Aegmas Integrated Projects Ltd | Wholesale & retail | 2026 |
| Aero Trade Ltd | Manufacturing | 2015 |
| Aesthetic Underground Gym Limited | Arts & recreation | 2017 |
| AEX Consultancy Limited | Financial services | 2015 |
| AFD Appliances Limited | Manufacturing | 2020 |
| AFG Motors Ltd | Wholesale & retail | 2019 |
| African French Speaking Community Support Ltd | Health & social care | 2013 |
| Afro Beauty Birmingham Ltd | Other services | 2025 |
| Afro Hair Birmingham Ltd | Other services | 2024 |
| AG Courier Service London Ltd | Transport & logistics | 2024 |
| AG One Construction Ltd | Construction | 2025 |
| Agile Coach Limited | Professional & scientific | 2017 |
| Agile PMC Limited | Professional & scientific | 2022 |
| Ahad's Enterprise Ltd | Wholesale & retail | 2020 |
| Ahaf Management Services Limited | Real estate | 2019 |
| Ahmed Brothers Halal Ltd | Manufacturing | 2019 |
| Ahmed Hasaan Nadeem Ltd | Wholesale & retail | 2026 |
| AHR Properties WM Ltd | Real estate | 2026 |
| AI Installations Ltd | Manufacturing | 2024 |
| AI Nail Academy Ltd | Education | 2026 |
| AID Hire Ltd | Wholesale & retail | 2015 |
| Aijay Black Limited | Construction | 2018 |
| AIM Inspire Ltd | Information & communication | 2020 |
| Ainkaf Limited | Extraterritorial | 2017 |
| Airnley Ltd | Wholesale & retail | 2021 |
| AJ Installations 22 Ltd | Construction | 2025 |
| AJ Midlands Service Ltd | Wholesale & retail | 2025 |
| AJ Services (WB) Ltd | Administrative & support | 2021 |
| AJA2HEALTH Limited | Health & social care | 2017 |
| Ajabeng Ltd | Health & social care | 2019 |