| Aaim Health Limited | Wholesale & retail | 2019 |
| Aaina Limited | Real estate | 2023 |
| Aajh Ltd | Real estate | 2022 |
| Aajver Ltd | Professional & scientific | 2008 |
| Aakeeshan Limited | Wholesale & retail | 2018 |
| AAL Food Services Ltd | Hospitality | 2024 |
| AAL Property Developments Ltd | Real estate | 2024 |
| AAL Property Investment Ltd | Real estate | 2025 |
| Aalberts Surface Technologies Limited | Manufacturing | 1969 |
| AAM Health Limited | Health & social care | 2017 |
| AAM MED Limited | Health & social care | 2020 |
| AAM Property Investments Limited | Real estate | 2020 |
| Aarcal Ltd | Real estate | 2025 |
| Aardua Limited | Other services | 2019 |
| Aardvark Artroom Ltd | Administrative & support | 2013 |
| Aariyahofficial Ltd | Wholesale & retail | 2025 |
| Aariyu Estates Limited | Real estate | 2021 |
| Aarke Consulting Ltd | Information & communication | 2015 |
| Aaron & Callum Properties Ltd | Real estate | 2025 |
| Aaron Black Funeral Directors Limited | Extraterritorial | 2007 |
| Aaron Johnson Carpentry & Restoration Limited | Construction | 2016 |
| Aaron Northridge Limited | Financial services | 2019 |
| Aaron Samuel Brooking Ltd | Extraterritorial | 2023 |
| Aarons Consultancy Ltd | Professional & scientific | 2005 |
| Aarons Properties Ltd | Real estate | 2018 |
| Aarya Consultancy Limited | Administrative & support | 2019 |
| Aaryash Limited | Real estate | 2012 |
| Aasheshma Ltd | Wholesale & retail | 2022 |
| AAU Commerce Ltd | Wholesale & retail | 2026 |
| AAZ Market Ltd | Wholesale & retail | 2025 |
| AB & FB Limited | Transport & logistics | 2016 |
| AB Anglo Foods Limited | Hospitality | 2018 |
| AB Brothers Limited | Hospitality | 2021 |
| AB Builders (Nottingham) Ltd | Construction | 2019 |
| AB Business Change and Transformation Ltd | Professional & scientific | 2024 |
| AB Cleaning Ltd | Administrative & support | 2017 |
| AB Commercial Cleaning Ltd | Administrative & support | 2020 |
| AB Design Build Services Ltd | Construction | 2025 |
| AB Flooring Specialists 123 Ltd | Construction | 2022 |
| AB Food and Catering Ltd | Hospitality | 2024 |
| AB Legal Consultants Ltd | Professional & scientific | 2015 |
| AB Rana Properties Ltd | Real estate | 2025 |
| AB Services Europe Ltd | Manufacturing | 2021 |
| AB Sound Services Ltd | Information & communication | 2012 |
| AB Tata Motors Ltd | Wholesale & retail | 2025 |
| ABA Industrial Supplies Limited | Extraterritorial | 2025 |
| Abab Professional Services Limited | Administrative & support | 2026 |
| Abacare Services Limited | Professional & scientific | 2019 |
| Abacaredig Holdings Limited | Health & social care | 2013 |
| Abaci IT Limited | Information & communication | 2015 |
| Abacus Accountancy & Taxation Services Ltd | Professional & scientific | 2010 |
| Abacus Jockey Ltd | Extraterritorial | 1997 |
| Abacus Property (Nottingham) Ltd | Real estate | 2023 |
| Abadz Consulting Ltd | Transport & logistics | 2023 |
| Abbco Transport Services Limited | Transport & logistics | 2006 |
| Abbey Construction (Ravenshead) Limited | Construction | 2025 |
| Abbey Contractors Limited | Wholesale & retail | 1988 |
| Abbey Driveways Limited | Administrative & support | 2014 |
| Abbey Electrical Contracts Ltd | Construction | 2019 |
| Abbey Estates (Ravenshead) Limited | Real estate | 2025 |
| Abbey Farm Investments Ltd | Financial services | 2018 |
| Abbey Fryer Limited | Hospitality | 2024 |
| Abbey Green Therapeutic Children's Services Ltd | Health & social care | 2018 |
| Abbey Group Ravenshead Limited | Real estate | 2026 |
| Abbey Holdings (Ravenshead) Limited | Real estate | 2026 |
| Abbey House Mortgages Ltd | Financial services | 2023 |
| Abbey House Wills & Estate Planning Ltd | Wholesale & retail | 2024 |
| Abbey Maintenance Services Limited | Construction | 2024 |
| Abbey North Homes Limited | Real estate | 2015 |
| Abbey Quarries Limited | | 1987 |
| Abbey Road 1966 Limited | Extraterritorial | 2015 |
| Abbey Road Kids Club Ltd. | Education | 2000 |
| Abbey Slip Ltd | Administrative & support | 2022 |
| Abbey Store Nottingham Limited | Financial services | 2025 |
| Abbey Street Hand Car Wash Ltd | Other services | 2021 |
| Abbey Street OFF Licence Ltd | Administrative & support | 2017 |
| Abbey View Trauma Informed Children's Services Ltd | Health & social care | 2025 |
| Abbeydale Operations Ltd | Professional & scientific | 2026 |
| Abbeyfield Estates Limited | Real estate | 2004 |
| Abbeyfield V.E. Limited | Professional & scientific | 1995 |
| Abbeyfields Groundworks and Landscaping Limited | Administrative & support | 2021 |
| Abbeyscape Limited | Real estate | 2002 |
| Abbeywood Packaging Limited | Administrative & support | 1996 |
| Abbie O Limited | Health & social care | 2025 |
| Abbie Trading Ltd | Wholesale & retail | 2025 |
| Abbott & Slippens Limited | Professional & scientific | 2022 |
| Abbott Garden Services Limited | Administrative & support | 2005 |
| ABC Alpha Business Centres UK Limited | Professional & scientific | 2012 |
| ABC Alpha Business Centres VI UK Limited | Professional & scientific | 2015 |
| ABC Austrian Business Company Limited | Other services | 2017 |
| ABC Flooring (UK) Limited | Construction | 2011 |
| ABC HNW Limited | | 2016 |
| ABC Maintenance Services Ltd | Construction | 2019 |
| ABC Paraplanning Limited | Professional & scientific | 2020 |
| ABC Tech Ltd | Wholesale & retail | 2007 |
| ABC123 Daycare Ltd | Health & social care | 2024 |
| Abcd-Engineering Ltd | Professional & scientific | 2020 |
| Abco Holdings (Nottingham) Limited | Financial services | 2019 |
| Abco Nottingham Limited | Wholesale & retail | 1981 |
| Abdellah Services Limited | Construction | 2025 |