| Ages Limited | Extraterritorial | 2009 |
| Agev Care Limited | Health & social care | 2025 |
| Agex Capital LP | | 2013 |
| AGF Davies Limited | Extraterritorial | 2022 |
| Agfs (Scotland) Ltd | Administrative & support | 2026 |
| Aggarwal Business Solutions Limited | Professional & scientific | 2010 |
| Aggleton Enterprises Ltd | Financial services | 2021 |
| Aggregate Environmental Solutions Limited | Water & waste | 2024 |
| Aggreko Australia Finance Limited | Administrative & support | 2020 |
| Aggreko Events Services Limited | Professional & scientific | 2017 |
| Aggreko Finance Limited | Administrative & support | 2003 |
| Aggreko Generators Limited | Professional & scientific | 1981 |
| Aggreko Holdings Limited | Professional & scientific | 1981 |
| Aggreko Indonesia Finance Limited | Financial services | 2018 |
| Aggreko International Projects Holdings Limited | Professional & scientific | 2011 |
| Aggreko International Projects Limited | Administrative & support | 1980 |
| Aggreko Limited | Administrative & support | 1997 |
| Aggreko Luxembourg Holdings | Professional & scientific | 2004 |
| Aggreko Pension Scheme Trustee Limited | Professional & scientific | 2008 |
| Aggreko Resalta Holdings Limited | Financial services | 2023 |
| Aggreko Russia Finance Limited | Professional & scientific | 2016 |
| Aggreko UK Finance Limited | Professional & scientific | 2016 |
| AGH Apex Limited | Administrative & support | 2017 |
| AGH Design Limited | Professional & scientific | 2013 |
| AGH Jewellers Ltd | Wholesale & retail | 2025 |
| Agha CUT Ltd | Other services | 2023 |
| Aghoco 5009 Limited | Professional & scientific | 2019 |
| Aghoco 5010 Limited | Professional & scientific | 2019 |
| Aghoco 5011 Limited | Professional & scientific | 2019 |
| AGI Services Ltd | Construction | 2015 |
| AGI Surveying Ltd | Professional & scientific | 2024 |
| Agilbility Limited | Manufacturing | 2019 |
| Agile Business Development Services Limited | Professional & scientific | 2020 |
| Agile City CIC | Arts & recreation | 2011 |
| Agile Klan Consult Ltd | Professional & scientific | 2022 |
| Agile OWL Ltd | Information & communication | 2024 |
| Agile PAY Ltd | Administrative & support | 2020 |
| Agile Thinking Limited | Information & communication | 2006 |
| Agileo Solutions Ltd | Professional & scientific | 2019 |
| Agilepro Consulting Ltd | Information & communication | 2022 |
| Agilidea Consulting Ltd | Information & communication | 2013 |
| Agilis Contractors Limited | Construction | 2016 |
| Agilitum Consult LP | | 2014 |
| Agility Financial Management Ltd | Financial services | 2010 |
| Agility Technologies Ltd | Information & communication | 2022 |
| Agilus Ltd | Information & communication | 2026 |
| Agincourt Ltd | Hospitality | 2019 |
| Agito Ltd | Administrative & support | 2021 |
| AGL Investments Limited | Real estate | 2022 |
| AGL Property Limited | Real estate | 2019 |
| AGL Vehicle Solutions Limited | Information & communication | 2017 |
| AGL1 Holdings Ltd | Professional & scientific | 2021 |
| Aglae Photography Ltd | Information & communication | 2021 |
| AGM Construction and Engineering Limited | Construction | 2017 |
| AGM Construction Management Limited | Construction | 2025 |
| AGM Electrical Services Ltd | Manufacturing | 2024 |
| AGM OIL & GAS Resources Ltd | Professional & scientific | 2015 |
| AGM Roofing & Construction Limited | Construction | 2005 |
| AGM Roofing & Maintenance Ltd | Construction | 2018 |
| AGM Rope Access Ltd | Construction | 2019 |
| Agmera Limited | Wholesale & retail | 2023 |
| Agmors Coachworks Ltd. | Administrative & support | 2003 |
| Agna Motors Ltd | Wholesale & retail | 2016 |
| Agnew Chimney Engineering Ltd | Construction | 2016 |
| Agnew Lane Ltd | Agriculture & fishing | 2022 |
| Agnew Property Ltd | Real estate | 2017 |
| Agnews (Fishmongers) Limited | Wholesale & retail | 1968 |
| Agnews (Scotland) Ltd | Hospitality | 2019 |
| Agnews Group Ltd | Hospitality | 2025 |
| Agnews Wind Services Ltd | Professional & scientific | 2023 |
| Agora Greek Delicacies Ltd | Wholesale & retail | 2012 |
| Agora Studios Ltd | Arts & recreation | 2025 |
| Agori Investments Ltd | Real estate | 2017 |
| Agorin Ltd | Other services | 2026 |
| AGP Entertainment Limited | Arts & recreation | 2025 |
| Agptc Healthcare Limited | Wholesale & retail | 2023 |
| AGR Hospitality (Stirling) Limited | Hospitality | 2025 |
| AGR Rendering Limited | Construction | 2022 |
| AGR Technical Ltd | Professional & scientific | 2025 |
| Agreen Ltd | Other services | 2025 |
| Agricald Limited | Agriculture & fishing | 2020 |
| Agrico Trade Holdings LP | | 2019 |
| Agrico Trading LP | | 2015 |
| Agrin Larkhall Ltd | Wholesale & retail | 2024 |
| Agriportunity Consultancy Ltd | Professional & scientific | 2023 |
| Agrippina Limited | Real estate | 2006 |
| Agris Commodities L.P. | | 2016 |
| Agrj Ltd | Wholesale & retail | 2026 |
| Agro Alliance Ukraine LP | | 2015 |
| Agro-Trade LP | | 2018 |
| Agromax Sales L.P. | | 2012 |
| Agropromholding LP | | 2015 |
| Agrotrade Import L.P. | | 2016 |
| Agrotrade Invest LP | | 2016 |
| AGS Stars Ltd | Administrative & support | 2022 |
| AGT Technologies Ltd | Information & communication | 2023 |
| Agt&T Ltd | Other services | 2024 |
| AGT64 Ltd | Other services | 2012 |
| AGU Consulting Services Ltd | Information & communication | 2021 |
| Agushi Properties Ltd | Real estate | 2026 |