| AG Commercial Investment Ltd | Construction | 2019 |
| AG International Beauty Academy Limited | Other services | 2024 |
| AG Projects Consulting Limited | Real estate | 2019 |
| AG Property & Management Ltd | Real estate | 2025 |
| AG Security Services Limited | Administrative & support | 2005 |
| AG Taswiq Ltd | Other services | 2023 |
| AG UK Consulting Limited | Information & communication | 2019 |
| Ag's Cosmetics & Accessories Limited | Wholesale & retail | 2024 |
| AG9 Investments Limited | Real estate | 2019 |
| AGA (Leic) Ltd | Hospitality | 2018 |
| AGA Carpets & Trading Co Ltd | Wholesale & retail | 2006 |
| AGA Estates Ltd | Real estate | 2020 |
| AGA Tetera Photography Limited | Professional & scientific | 2023 |
| Agada Zion Ltd | Administrative & support | 2024 |
| Agal Ltd | Construction | 2026 |
| Agape Medical Group Ltd | Wholesale & retail | 2025 |
| Agard Living Limited | Construction | 2021 |
| Agarwal Asset Management (G&T) Ltd | Real estate | 2025 |
| Agarwal Properties Investments Limited | Real estate | 2018 |
| Agate Immigration Services Ltd | Professional & scientific | 2021 |
| Agav Ltd | Transport & logistics | 2020 |
| AGB Cars (Leicester) Limited | Wholesale & retail | 2020 |
| AGB Content Marketing Ltd | Professional & scientific | 2023 |
| AGB Investments Limited | Real estate | 2016 |
| Agbm Technologies Ltd | Professional & scientific | 2019 |
| AGC UK Holdings Ltd | Financial services | 2025 |
| Agct Ltd | Wholesale & retail | 2025 |
| AGD Investment Management Limited | Financial services | 2021 |
| AGE UK Leicester Shire & Rutland Contract Care Limited | Health & social care | 2005 |
| AGE UK Leicester Shire & Rutland Transport & Trading Limited | Transport & logistics | 2000 |
| AGE UK Leicester Shire and Rutland | Health & social care | 2011 |
| AGE UK Leicester Shire and Rutland Home Help Limited | Health & social care | 1999 |
| AGE UK Suffolk | Other services | 2001 |
| Agency 666 Ltd | Information & communication | 2024 |
| Agency Alchemy Limited | Professional & scientific | 2022 |
| Agency Payroll Services Limited | Professional & scientific | 2021 |
| Agency SIX Ltd | Professional & scientific | 2018 |
| Agent Connect Limited | Information & communication | 2024 |
| Agent One Leicester Ltd | Real estate | 2025 |
| Agent One Ltd | Real estate | 2023 |
| Agentdraw Holdings Limited | Manufacturing | 2017 |
| Agentdraw Limited | Manufacturing | 1991 |
| Agentdraw Manufacturing Limited | Manufacturing | 2016 |
| Agentic Consulting Limited | Professional & scientific | 2025 |
| Agentis International Limited | Administrative & support | 2018 |
| Agentiveux Ltd | Information & communication | 2025 |
| Agents Support Ltd | Real estate | 2025 |
| AGF Security Limited | Administrative & support | 2026 |
| AGF Studio Ltd | Information & communication | 2014 |
| Agfix Ltd | Construction | 2025 |
| AGG Smart Ltd | Information & communication | 2017 |
| Aggarwal Estate & Capital Limited | Real estate | 2025 |
| Aggregates and Minerals Limited | Mining & quarrying | 1965 |
| Agile AI Solutions Ltd | Information & communication | 2025 |
| Agile Antenna Consulting Ltd | Administrative & support | 2018 |
| Agile IT World Limited | Information & communication | 2010 |
| Agile Logistics Consulting Ltd | Administrative & support | 2022 |
| Agile Saints Limited | Administrative & support | 2016 |
| Agiletech London Ltd | Information & communication | 2024 |
| AGJ Fashion Ltd | Manufacturing | 2025 |
| Agkl Consulting Limited | Professional & scientific | 2025 |
| AGL108 Limited | Real estate | 2020 |
| AGN Property Maintenance Ltd | Construction | 2025 |
| Agna Foods Ltd | Hospitality | 2026 |
| Agniecha Limited | Transport & logistics | 2018 |
| Agnupi Limited | Health & social care | 2025 |
| Agoud Ltd | Information & communication | 2026 |
| Agoy Holdings Limited | Administrative & support | 2016 |
| Agoy Trading Limited | Wholesale & retail | 2026 |
| AGR Convenience Store Ltd | Wholesale & retail | 2026 |
| AGR Goods and Transportation Ltd | Transport & logistics | 2025 |
| AGR HR Solutions Ltd | Information & communication | 2024 |
| AGR Law Ltd | Professional & scientific | 2016 |
| Agratech Limited | Administrative & support | 2010 |
| Agriculture Sales Company (Agsales) Ltd | Wholesale & retail | 2020 |
| Agrisonic Solutions Limited | Wholesale & retail | 2025 |
| Agrotrials Consulting Ltd | Professional & scientific | 2026 |
| AGS Counselling Services Limited | Health & social care | 2022 |
| Agshi SAI Vais Tradings Limited | Wholesale & retail | 2019 |
| Agterracoop Ltd | Agriculture & fishing | 2019 |
| AGU Enterprice Ltd | Wholesale & retail | 2026 |
| AGU Shock Ltd | Wholesale & retail | 2026 |
| Agventure Farms Ltd | Agriculture & fishing | 2020 |
| Agwan Properties Ltd | Real estate | 2020 |
| AH Eyecare Ltd | Health & social care | 2025 |
| AH Fresh Food Limited | Manufacturing | 2020 |
| AH Lewin Ltd | Construction | 2025 |
| AH Supply Ltd | Wholesale & retail | 2026 |
| Ah&Zai Group Ltd | Hospitality | 2025 |
| AHA Energy UK Ltd | Information & communication | 2018 |
| AHA Garments Ltd | Manufacturing | 2019 |
| AHA Investment Group UK Ltd | Financial services | 2021 |
| AHA Property Maintenance Limited | Other services | 2025 |
| Ahana Parag Ltd | Wholesale & retail | 2025 |
| AHD Optical Limited | Health & social care | 2014 |
| Ahead Electrical Solutions Ltd | Construction | 2019 |
| Aheadoftheherd Limited | Professional & scientific | 2011 |
| Ahenx Food Ltd | Wholesale & retail | 2025 |
| Ahfgroup Ltd | Wholesale & retail | 2022 |
| Ahilya Properties Limited | Real estate | 2026 |