| AAM Kitchen and Bedroom Limited | Manufacturing | 2024 |
| Aana Tivik Property Ltd | Real estate | 2025 |
| AAP. Clerk of Works Services Limited | Construction | 2016 |
| Aapon Mini Market Ltd | Wholesale & retail | 2024 |
| Aara Properties Ltd | Real estate | 2022 |
| Aarav Technology Limited | Information & communication | 2017 |
| Aaravnika Ltd | Real estate | 2025 |
| Aaria Estates Limited | Real estate | 2020 |
| Aarib Property Management Ltd | Real estate | 2019 |
| Aarlan Limited | Health & social care | 2019 |
| Aaron & Angel Ltd | Health & social care | 2022 |
| Aaron & ASH Ltd | Extraterritorial | 2022 |
| Aaron Fortune TM Ltd | Construction | 2024 |
| Aaron Richards Flooring Ltd | Construction | 2021 |
| Aaron Shinu Limited | Wholesale & retail | 2012 |
| Aaronji Limited | Wholesale & retail | 2007 |
| Aarray Technologies Limited | Information & communication | 2019 |
| Aarti Trading Ltd | Wholesale & retail | 2024 |
| Aasco Air LLP | | 2024 |
| Aashiana Properties Limited | Real estate | 2019 |
| Aashrima Ltd | Real estate | 2020 |
| AAT Limited | Professional & scientific | 2008 |
| AAT Retail Limited | Wholesale & retail | 2026 |
| Aathiran One Limited | Wholesale & retail | 2025 |
| Aathiz Ltd | Wholesale & retail | 2023 |
| Aattia Ltd | Health & social care | 2026 |
| AAV Global Traders Ltd | Wholesale & retail | 2025 |
| Aayan Foods Limited | Hospitality | 2019 |
| Aayzee Ventures Ltd | Real estate | 2025 |
| AB Coventry Wholesales Limited | Wholesale & retail | 2025 |
| AB Driving Solutions Ltd | Transport & logistics | 2020 |
| AB Engineering Limited | Professional & scientific | 1994 |
| AB FX Ltd | Information & communication | 2024 |
| AB Salvage Limited | Wholesale & retail | 2021 |
| AB SERVICES247 Ltd | Administrative & support | 2024 |
| AB Taxis Ltd | Transport & logistics | 2025 |
| Ababa Limited | Professional & scientific | 2015 |
| Abacus 5 Limited | Professional & scientific | 2018 |
| Abacus Accountants & Associates Ltd | Professional & scientific | 2010 |
| Abacus Counselling Services Limited | Health & social care | 1998 |
| Abacus Investors Limited | Professional & scientific | 2001 |
| Abadab Care Ltd | Health & social care | 2023 |
| Abah Limited | Transport & logistics | 2026 |
| Abains Property Ltd | Real estate | 2022 |
| Abalto Ltd | Information & communication | 2003 |
| Abautoscov Limited | Wholesale & retail | 2021 |
| Abbadi Limited | Education | 2015 |
| Abbas International Ltd | Wholesale & retail | 2025 |
| Abbey 4472 Ltd | Real estate | 2023 |
| Abbey Blinds and Curtains Ltd | Manufacturing | 2024 |
| Abbey Dealz Limited | Wholesale & retail | 2025 |
| Abbey Investments (Birmingham) Limited | Real estate | 2017 |
| Abbey Magic Services Limited | Transport & logistics | 2015 |
| Abbey Panels Investments Limited | Extraterritorial | 1959 |
| Abbey Panels Limited | Extraterritorial | 1952 |
| Abbey View Accountancy Services Ltd | Professional & scientific | 2018 |
| Abbey Wood Court Limited | Health & social care | 2019 |
| Abbey Wood Court Property Limited | Real estate | 2019 |
| Abbey Wood Manor Limited | Health & social care | 2019 |
| Abbey Wood Manor Property Limited | Real estate | 2019 |
| Abbey Wood Park Limited | Health & social care | 2019 |
| Abbey Wood Park Property Limited | Real estate | 2019 |
| Abbey Wood View Limited | Health & social care | 2024 |
| Abbey Wood View Property Limited | Real estate | 2024 |
| Abbeydore Guest House Limited | Hospitality | 2013 |
| Abbeygate Cobblers Ltd | Manufacturing | 2013 |
| Abbeywood Care Homes Limited | Administrative & support | 2019 |
| Abbots Gate Management Company Limited | Households | 1999 |
| Abbott Electrical Services Ltd | Construction | 2025 |
| Abby Digital Europe Limited | Information & communication | 2023 |
| Abby Keast Limited | Wholesale & retail | 2023 |
| Abby Retail Ltd | Wholesale & retail | 2018 |
| ABC Hub Innovation Limited | Wholesale & retail | 2024 |
| ABC Nurseries (Coventry) 20 Limited | Health & social care | 2015 |
| ABC Nurseries (Coventry) Limited | Education | 2003 |
| ABC Prop Co Holdings Limited | Real estate | 2015 |
| ABC Tool Hire Limited | Administrative & support | 2020 |
| ABC Trio Innovation Ltd | Information & communication | 2021 |
| Abceroy Trading Ltd | Wholesale & retail | 2025 |
| Abdali Ltd | Wholesale & retail | 2023 |
| Abel Chemist Limited | Wholesale & retail | 2003 |
| Abel Equestrian Ltd | Arts & recreation | 2026 |
| Abel Heritage Estates Ltd | Financial services | 2026 |
| Abena UK Limited | Manufacturing | 1999 |
| Abendoh Aasguard & Associate Holding Limited | Financial services | 2018 |
| Aberbargoed Fish and Chips Ltd | Hospitality | 2018 |
| Aberbrooke Ltd | Wholesale & retail | 2024 |
| ABG Education Ltd | Education | 2024 |
| Abha Estates Ltd | Real estate | 2024 |
| Abhu Ltd | Wholesale & retail | 2026 |
| ABI Business Services Limited | Information & communication | 2014 |
| ABI Electric Limited | Construction | 2025 |
| Abicsm Cleaning Ltd | Wholesale & retail | 2026 |
| Abicube Property Management Ltd | Real estate | 2025 |
| Abid Digital Engineering Ltd | Information & communication | 2026 |
| Abid Family Holdings Ltd | Other services | 2007 |
| Ability PLUS25 Supported Living CIC | Health & social care | 2025 |
| Abioseh Limited | Manufacturing | 2018 |
| Abira Engineering Services Private Limited | Professional & scientific | 2025 |
| Abis Professional Services Ltd | Wholesale & retail | 2024 |