| Abundant Life Ltd | Health & social care | 2006 |
| Abundant Promises Limited | Health & social care | 2019 |
| Abundnce* Limited | Wholesale & retail | 2025 |
| Aburdecat Ltd | Wholesale & retail | 2025 |
| Abushawesh and Partner for Trading Ltd | Wholesale & retail | 2024 |
| Abutalha Services Limited | Professional & scientific | 2025 |
| ABV Trading Ltd | Construction | 2017 |
| Abwm Ltd | Other services | 2016 |
| ABY Motors Limited | Wholesale & retail | 2024 |
| ABY Online.Com Ltd | Wholesale & retail | 2024 |
| Aby's Biryani Ltd | Hospitality | 2022 |
| Abycare Services Limited | Administrative & support | 2025 |
| Abygail Vision Ltd | Health & social care | 2018 |
| Abymm Ltd | Professional & scientific | 2013 |
| Abyssal Interactive Ltd | Information & communication | 2026 |
| ABZ Consultancy and Training Ltd | Manufacturing | 2020 |
| ABZ Clothing Limited | Wholesale & retail | 2020 |
| ABZ Electrical Contractors Ltd | Construction | 2024 |
| ABZ Jada Ltd | Wholesale & retail | 2018 |
| Abzac Ltd | Information & communication | 2021 |
| Abzcollective Ltd | Real estate | 2025 |
| Abzel Ltd | Wholesale & retail | 2025 |
| Abzmart Online Ltd | Wholesale & retail | 2026 |
| AC & MC Properties Limited | Real estate | 2015 |
| AC Admin Services Ltd | Administrative & support | 2018 |
| AC and Vent Solutions Limited | Energy | 2022 |
| AC Cable Solutions 2024 Ltd | Administrative & support | 2000 |
| AC Cable Solutions Ltd | Administrative & support | 2022 |
| AC Capital Group Ltd | Professional & scientific | 2020 |
| AC Construction & Developments Limited | Construction | 2023 |
| AC DEL Ltd | Hospitality | 2024 |
| AC Designs & Prints Limited | Wholesale & retail | 2024 |
| AC Dust & Vent Ltd | Professional & scientific | 2026 |
| AC Estates NW Limited | Real estate | 2020 |
| AC Eyecare Limited | Health & social care | 2019 |
| AC Fitted Bedrooms & Kitchens Limited | Construction | 2020 |
| AC Food U.K Ltd | Hospitality | 2025 |
| AC Ices Ltd | Hospitality | 2024 |
| AC Investment Property Limited | Real estate | 2021 |
| AC Investments MCR Ltd | Real estate | 2021 |
| AC Laboratories Limited | Manufacturing | 2019 |
| AC Legal Limited | Professional & scientific | 2018 |
| AC Mitchell Consultancy Limited | Professional & scientific | 2016 |
| AC Physiotherapy Ltd | Health & social care | 2025 |
| AC Property Developments Ltd | Real estate | 2019 |
| AC Property Lettings Ltd | Households | 2025 |
| AC Real Estates NW Ltd | Real estate | 2022 |
| AC Smiley Face Limited | Hospitality | 2024 |
| AC Subsea Marine Ltd | Professional & scientific | 2019 |
| AC Taylor Limited | Real estate | 2024 |
| AC Times Two Limited | Information & communication | 2008 |
| AC Urban Properties Ltd | Real estate | 2024 |
| AC Vape Ltd | Wholesale & retail | 2020 |
| AC01 HMO Limited | Real estate | 2025 |
| AC01 SPV Ltd | Real estate | 2017 |
| AC02 SPV Ltd | Real estate | 2024 |
| AC1 Services Ltd | Information & communication | 2004 |
| AC4S Care Ltd | Construction | 2023 |
| ACA Civil Engineering Ltd | Administrative & support | 2015 |
| Acacia Management Services Limited | Administrative & support | 2022 |
| Acacia Resourcing Services Limited | Administrative & support | 2019 |
| Acacia Services Ltd | Information & communication | 2021 |
| Acacia TOK Ltd | Administrative & support | 2021 |
| Academic Conferences International Limited | Administrative & support | 2019 |
| Academic Edge Press Ltd | Information & communication | 2024 |
| Academic Media Group Limited | Professional & scientific | 2016 |
| Academic Studio Ltd | Professional & scientific | 2018 |
| Academics Limited | Professional & scientific | 2006 |
| Academy 92 Asia Limited | Extraterritorial | 2017 |
| Academy Apartments (Manchester) Ltd | Construction | 2017 |
| Academy for Divine Diamonds Ltd | Administrative & support | 2022 |
| Academy for Divine Souls Ltd | Administrative & support | 2022 |
| Academy Motor Group Limited | Financial services | 2016 |
| Academy of Anglo-Italian Comparative Law and Bioethics Limited | Professional & scientific | 2026 |
| Academy of Future Learning Ltd | Education | 2022 |
| Academy of Pharmaceutical Sciences | Other services | 2001 |
| Academy Online Learning Ltd | Education | 2012 |
| Acadex Training Ltd | Education | 2026 |
| Acadia Digital Limited | Information & communication | 2024 |
| Acai Studios Ltd | Information & communication | 2025 |
| Acai World Ltd | Hospitality | 2025 |
| Acap Marketing Ltd | Professional & scientific | 2024 |
| Acar Properties Management Limited | Real estate | 2020 |
| ACB Plumbing & Heating Ltd | Construction | 2015 |
| Acceber Apparel Limited | Wholesale & retail | 2025 |
| Acceleraate Limited | Information & communication | 2022 |
| Accelerant Detection Dog Support | Administrative & support | 2019 |
| Accelerate ME CIC | Education | 2020 |
| Acceleration (Elan) Limited | Wholesale & retail | 1975 |
| Acceleration (Hire) Limited | Wholesale & retail | 1982 |
| Accelerental Ltd | Administrative & support | 2022 |
| Accelerus Limited | Professional & scientific | 2013 |
| Accent Academy Ltd | Education | 2025 |
| Accent Cleaning Ltd | Households | 2020 |
| Accent Fashion Accessories Limited | Wholesale & retail | 2005 |
| Access ALL Areas Security Installations Limited | Administrative & support | 2003 |
| Access Beyond Ltd | Information & communication | 2019 |
| Access Building and Roofing Ltd | Construction | 2023 |
| Access Capital Partners Advisor UK Limited | Financial services | 2005 |
| Access Developers Ltd | Construction | 2023 |