| Asca International Limited | Energy | 2005 |
| Ascentia Corporate Coaching Limited | Professional & scientific | 2007 |
| Asclean (Midlands) Ltd | Other services | 2003 |
| Asdunbar Limited | Real estate | 2018 |
| Asgi Ltd | Real estate | 2015 |
| ASH & Lacy Limited | Professional & scientific | 1896 |
| ASH & Lacy Manufacturing Limited | Professional & scientific | 1995 |
| ASH & Lacy Services Limited | Professional & scientific | 1993 |
| ASH Cyber Developments Limited | Households | 2023 |
| ASH Property Buyers Limited | Real estate | 2006 |
| ASH Sharma Ltd | Health & social care | 2011 |
| ASH50 Ltd | Health & social care | 2018 |
| Ashby Woulds Lodges LLP | | 2016 |
| Ashcare Holdings Limited | Financial services | 2024 |
| Ashcare Investco Limited | Real estate | 2024 |
| Ashcare Solihull Limited | Health & social care | 2023 |
| Ashdale Homes Limited | Construction | 2024 |
| Ashdale Investments (Acocks Green) Limited | Real estate | 2002 |
| Ashdale Investments (Bromsgrove) Limited | Real estate | 2005 |
| Ashdale Investments (Holdings) Limited | Professional & scientific | 1995 |
| Ashdale Investments (Properties NO. 2) Limited | Real estate | 1998 |
| Ashdale Investments (Properties NO. 4) Limited | Real estate | 1998 |
| Ashdale Investments Limited | Extraterritorial | 2007 |
| Ashdale Letting Limited | Real estate | 2025 |
| Ashfield Connections Ltd | Administrative & support | 2009 |
| Ashfield Housing Ltd | Real estate | 2023 |
| Ashforth Electrical Services Limited | Construction | 2016 |
| Ashgrove Contracts Ltd | Construction | 2006 |
| Ashington Developments Limited | Construction | 2025 |
| Ashlar Evolution Limited | Professional & scientific | 2006 |
| Ashlawn Chase Limited | Real estate | 2026 |
| Ashlawn Homes Limited | Real estate | 2017 |
| Ashlea Solutions Limited | Professional & scientific | 2006 |
| Ashmere Limited | Construction | 1986 |
| Ashmere Property Ltd | Real estate | 2025 |
| Ashylla Aesthetics Ltd | Health & social care | 2022 |
| Asif Baig Ltd | Real estate | 2025 |
| ASJ Accountants Limited | Professional & scientific | 2021 |
| ASJ Business Services Limited | Professional & scientific | 2018 |
| ASJ Financial Accounting Services Ltd | Professional & scientific | 2013 |
| ASJ Solihull Tuition Centre Limited | Education | 2018 |
| ASK (Midlands) Ltd | Hospitality | 2021 |
| ASK Finite Limited | Wholesale & retail | 2021 |
| ASK Global Products Ltd | Construction | 2018 |
| ASK-4 Business Solutions Limited | Information & communication | 2003 |
| ASK25 Properties Limited | Real estate | 2025 |
| Askey GAS Engineering Ltd | Other services | 2018 |
| ASM Locum Ltd | Wholesale & retail | 2025 |
| Asmara Barbers Limited | Other services | 2025 |
| ASN Business Services Ltd | Information & communication | 2018 |
| ASN Consulting Services Ltd | Information & communication | 2025 |
| ASN Lets Ltd | Real estate | 2024 |
| Aspect (Hersham) Management Co Ltd | Households | 2019 |
| Aspen Bridging Limited | Financial services | 2016 |
| Aspen Cooling Limited | Other services | 1995 |
| Aspen Drive (Hawkesbury) Limited | Construction | 2023 |
| Aspen Exchange Limited | Real estate | 2024 |
| Asperon Limited | Professional & scientific | 2007 |
| Aspire & Hope CIC | Financial services | 2024 |
| Aspire Aesthetica Limited | Other services | 2020 |
| Aspire Aesthetics (Midlands) Ltd | Other services | 2020 |
| Aspire Capital Investments Limited | Real estate | 2023 |
| Aspire Consultants Limited | Professional & scientific | 2015 |
| Aspire Contract Scaffolding Limited | Construction | 2011 |
| Aspire Energy Solutions Ltd | Administrative & support | 2021 |
| Aspire INT. Limited | Wholesale & retail | 2024 |
| Aspire Offshore Limited | Administrative & support | 2026 |
| Aspire Pharm Ltd | Health & social care | 2020 |
| Aspire Properties Bham Limited | Real estate | 2025 |
| ASPIRE2INSPIRE Cosmetics Ltd | Wholesale & retail | 2022 |
| ASPIRE2INSPIRE Training Academy Ltd | Education | 2022 |
| Aspiring Trading Ltd | Wholesale & retail | 2022 |
| ASR Medical Limited | Health & social care | 2022 |
| Asrk Healthcare Ltd | Health & social care | 2023 |
| Asset International Limited | Professional & scientific | 1987 |
| Asset International Structures Limited | Construction | 2023 |
| Asset Vision Limited | Information & communication | 2022 |
| Assilem Limited | Real estate | 2021 |
| Assist Tools Limited | Wholesale & retail | 2009 |
| Associate Sales Ltd | Extraterritorial | 2014 |
| Associated Independent Stores Limited | Other services | 1967 |
| Association of Interior Specialists Limited | Other services | 2015 |
| Association of Plumbing and Heating Contractors (Certification)Limited | Professional & scientific | 1993 |
| Association of Plumbing and Heating Contractors (Holdings) Limited | Professional & scientific | 2004 |
| Association of Plumbing and Heating Contractors (Training) Limited | Education | 1992 |
| Association of Plumbing and Heating Contractors Limited | Professional & scientific | 2004 |
| AST Pharm Ltd | Wholesale & retail | 2025 |
| AST Real Estate Ltd | Real estate | 2023 |
| Asteri Capital Ltd | Information & communication | 2012 |
| Asterwell Limited | Real estate | 1983 |
| Asthore Limited | Manufacturing | 2021 |
| Asthore Properties Limited | Real estate | 2025 |
| Aston Medisafe Limited | Real estate | 2005 |
| Aston Oxfordshire Limited | Construction | 2022 |
| Astone Vehicle Management Limited | Wholesale & retail | 2007 |
| Astral Developments (Coventry) Limited | Real estate | 2000 |
| Astral Developments Limited | Real estate | 1999 |
| Astral Holdings Limited | Real estate | 2000 |
| Astral Investments Limited | Real estate | 2003 |
| Astro Housing (Birmingham) Limited | Real estate | 2020 |