| Afterhours Shipping Ltd | Transport & logistics | 2025 |
| Afterlife Corporation Ltd | Administrative & support | 2017 |
| Afterlife Productions Ltd | Information & communication | 2024 |
| Afterlight Studios Limited | Information & communication | 2025 |
| Aftermarket Car Parts Ltd | Wholesale & retail | 2013 |
| Afusion Management Ltd | Administrative & support | 2025 |
| AFV Properties Ltd | Real estate | 2020 |
| Afyaroot Ltd | Administrative & support | 2026 |
| Afza's Limited | Transport & logistics | 2025 |
| Afzaal Aston Limited | Hospitality | 2025 |
| Afzals and Sons Limited | Wholesale & retail | 2024 |
| AG & M Property Limited | Real estate | 2020 |
| AG & SN Ltd | Health & social care | 2022 |
| AG Automotive Ltd | Wholesale & retail | 2022 |
| AG Care Services Limited | Health & social care | 2015 |
| AG Clinic Ltd | Health & social care | 2022 |
| AG Construction (Hilton) Ltd | Construction | 2018 |
| AG Constructions LON Ltd | Construction | 2025 |
| AG Douglas Arboriculture Ltd | Administrative & support | 2023 |
| AG Estates (Edgbaston) Limited | Households | 1982 |
| AG Family Bereavement Support Ltd | Other services | 2025 |
| AG Home Solutions Limited | Construction | 2025 |
| AG Malls Ltd | Wholesale & retail | 2023 |
| AG Mobile Repairs & Vapes Ltd | Wholesale & retail | 2018 |
| AG Motors Birmingham Ltd | Wholesale & retail | 2022 |
| AG Retail Ltd | Wholesale & retail | 2024 |
| AG Star Travel Ltd | Administrative & support | 2024 |
| AG Systems Consulting Limited | Professional & scientific | 2017 |
| AG Tax Consulting Limited | Professional & scientific | 2025 |
| AG Technical Sevices Ltd | Professional & scientific | 2025 |
| AG10 BIO Ltd | Professional & scientific | 2026 |
| Agad Health Care Ltd | Public administration | 2022 |
| Agad Limited | Wholesale & retail | 2025 |
| Agadir Cafe Limited | Hospitality | 2025 |
| Agam Solutions Limited | Health & social care | 2023 |
| Agape Care Ltd | Administrative & support | 2024 |
| Agape Family Church | Other services | 2023 |
| Agape Healthcare Limited | Health & social care | 2010 |
| Agape Holding Ltd | Financial services | 2023 |
| Agape Limited | Other services | 1990 |
| Agape Ministries Limited | Other services | 1969 |
| Agaps & Partners UK Tax Agent Ltd | Professional & scientific | 2024 |
| Agapé IT Ltd | Information & communication | 2024 |
| Agaram Health Limited | Health & social care | 2018 |
| Agarwal Investments Limited | Real estate | 2024 |
| Agarwals FIC Ltd | Financial services | 2026 |
| Agas Services Limited | Other services | 2003 |
| Agat (ASZ) Ltd | Transport & logistics | 2016 |
| Agathe Ltd | Wholesale & retail | 2025 |
| AGC1874 Limited | Other services | 2025 |
| AGE UK Birmingham and the Black Country Trading Limited | Health & social care | 1994 |
| AGE UK Birmingham Limited | Health & social care | 2010 |
| Ageable CIC | Professional & scientific | 2021 |
| Ageen Lounge Ltd | Wholesale & retail | 2024 |
| Agency Construction Limited | Extraterritorial | 2018 |
| Agency Network Ltd | Professional & scientific | 2017 |
| Agency of Everything Limited | Administrative & support | 2018 |
| Agency Z Payroll Limited | Administrative & support | 2021 |
| Agendact LLP | | 2025 |
| Agent Bridge Limited | Information & communication | 2025 |
| Agenticz Ltd | Information & communication | 2025 |
| Agents Together Ltd | Education | 2020 |
| Agentus AI Ltd | Information & communication | 2025 |
| AGG Investment Group Limited | Other services | 2021 |
| Aggarwal Associates Ltd | Wholesale & retail | 2021 |
| Agglomerate Technologies Ltd | Manufacturing | 2025 |
| Aggo Ltd | Manufacturing | 2022 |
| Aggregate Connection LP | | 2017 |
| Aggregate Direct Limited | Extraterritorial | 1979 |
| Agha Properties Ltd | Real estate | 2023 |
| Aghadelly UK Ltd | Hospitality | 2026 |
| Aghatech Ltd | Information & communication | 2026 |
| Aghosh Textile UK Limited | Wholesale & retail | 2017 |
| Agida Transport Ltd | Transport & logistics | 2015 |
| Agile Accountants Limited | Extraterritorial | 2022 |
| Agile Angels Consultants Ltd | Information & communication | 2018 |
| Agile Consulting Solutions Ltd | Information & communication | 2014 |
| Agile Electrics Ltd | Construction | 2024 |
| Agile Engine Limited | Professional & scientific | 2023 |
| Agile Express Ltd | Professional & scientific | 2020 |
| Agile Means Limited | Information & communication | 2016 |
| Agile Personnel Limited | Administrative & support | 2021 |
| Agile PM Limited | Construction | 2025 |
| Agile Professional Group Ltd | Information & communication | 2020 |
| Agile Safe Ltd | Information & communication | 2021 |
| Agile Trade Solutions Limited | Wholesale & retail | 2019 |
| Agilecookies Ltd | Real estate | 2021 |
| Agilyx Emea Ltd | Information & communication | 2021 |
| Agilyx UK Limited | Information & communication | 2006 |
| Agito Medical Limited | Health & social care | 2024 |
| AGK Project Consulting Limited | Professional & scientific | 2024 |
| AGK Supplies Ltd | Wholesale & retail | 2025 |
| AGL Accountants and Tax Consultants Ltd | Professional & scientific | 2024 |
| AGL Construction Ltd | Construction | 2026 |
| AGL Realisations Limited | Wholesale & retail | 1929 |
| AGL Wealth Management Limited | Financial services | 2009 |
| Agladious Limited | Health & social care | 2021 |
| Aglp Enterprises Ltd | Administrative & support | 2017 |
| Aglp Events Enterprises CIC | Education | 2025 |
| AGM Facility Ltd | Hospitality | 2024 |