| Abacus Umbrella Ltd | Administrative & support | 2020 |
| Abarno Consulting Ltd | Professional & scientific | 2018 |
| Abaseen Cheetham Hill Ltd | Other services | 2019 |
| Abbey Chemicals Ltd | Real estate | 2014 |
| Abbey Electrical (East Anglia) Ltd | Construction | 2014 |
| Abbey Memorials (Stonecraft) Limited | Other services | 2004 |
| Abbey Pets Remembrance Gardens and Crematoria Limited | Professional & scientific | 1989 |
| Abbeycroft Limited | Professional & scientific | 2017 |
| Abbie Rushton Editorial Limited | Information & communication | 2024 |
| Abbot FOX Ltd | Real estate | 2012 |
| Abbott Building Services Ltd | Construction | 2021 |
| Abbottcam Ltd | Information & communication | 2023 |
| Abbotts Grange Forncett ST Peter Residents Management Company Limited | Households | 2015 |
| Abbotts Leisure Parks Ltd | Arts & recreation | 2017 |
| Abbotts Park Homes Limited | Information & communication | 2016 |
| Abbotts Property Investments Ltd | Real estate | 2021 |
| Abbs Close (Reepham) Management Ltd | Households | 2020 |
| ABC Chimney Sweep Ltd | Administrative & support | 2022 |
| ABC Chinese Foods Ltd | Hospitality | 2025 |
| ABC Emporium Ltd | Administrative & support | 2016 |
| ABC Emtcs Ltd | Education | 2015 |
| ABC Food Law Limited | Administrative & support | 2012 |
| ABC Food Safety Ltd. | Administrative & support | 2002 |
| ABC Groundworks (East Anglia) Limited | Construction | 2017 |
| ABC Heating Limited | Construction | 2007 |
| ABC Public House Limited | Hospitality | 2022 |
| Abcpc Ltd | Other services | 2025 |
| Abczone Limited | Wholesale & retail | 2012 |
| ABD Consultancy Limited | Professional & scientific | 2017 |
| Abdc Property Limited | Real estate | 2023 |
| Abduction 51 Ltd | Wholesale & retail | 2018 |
| Abdul Inusah Limited | Health & social care | 2019 |
| Abel Hands Ltd | Administrative & support | 2024 |
| Abel Motorworks Ltd | Wholesale & retail | 2018 |
| Abels Chesney Ltd | Professional & scientific | 2020 |
| Abfp Holdings Ltd | Financial services | 2024 |
| Abhay Properties Ltd | Real estate | 2019 |
| ABI Chicken HUT Ltd | Hospitality | 2018 |
| Abidan Limited | Information & communication | 2022 |
| Abide Healthcare Ltd | Public administration | 2024 |
| Abil X Ltd | Education | 2024 |
| Abimo Leisure Limited | Hospitality | 2012 |
| Abing Homecare Limited | Extraterritorial | 2021 |
| Abiolacfa Limited | Transport & logistics | 2022 |
| ABJ Limited | Financial services | 2023 |
| ABK Norfolk Ltd | Manufacturing | 2026 |
| Ablawin Trading Company Ltd | Manufacturing | 2019 |
| Able Care Agency Limited | Health & social care | 2004 |
| Able Community Care Limited | Health & social care | 2011 |
| Able HR Investco 1 Limited | Financial services | 2026 |
| Able HR Investco 2 Limited | Financial services | 2026 |
| Able HR Limited | Professional & scientific | 2009 |
| ABLE2B Community Interest Company | Other services | 2018 |
| ABLE2B Training Limited | Education | 2024 |
| Ablewhite Lettings Ltd | Real estate | 2010 |
| Abmceinvestment Ltd | Real estate | 2025 |
| Abna Property Ltd | Real estate | 2017 |
| ABO Bespoke Kitchens Ltd | Construction | 2021 |
| Abode Ability Ltd | Real estate | 2024 |
| Abode Auctions Ltd | Real estate | 2023 |
| Abode Builds Ltd | Construction | 2025 |
| Abode Construction (EA) Limited | Construction | 2020 |
| Abotsi EY Deliveries Ltd | Extraterritorial | 2020 |
| About US Together Ltd | Administrative & support | 2023 |
| Above & Beyond Together Ltd | Hospitality | 2024 |
| Above and Beyond Scaffolding Limited | Extraterritorial | 2010 |
| Above the Bay Holdings Limited | Hospitality | 2021 |
| Abovo Structural Engineers Ltd | Professional & scientific | 2020 |
| ABP Pizza 2 Ltd | Hospitality | 2014 |
| ABP Pizza Ltd | Hospitality | 2014 |
| Abram Communications Limited | Professional & scientific | 2020 |
| Abriko Ltd | Administrative & support | 2017 |
| ABS Works Limited | Wholesale & retail | 2018 |
| Absa Ltd | Other services | 2007 |
| Absolute Access and Plant Limited | Manufacturing | 2023 |
| Absolute Building Limited | Construction | 2006 |
| Absolute Commissioning Limited | Professional & scientific | 2017 |
| Absolute Consulting Engineers Limited | Professional & scientific | 2006 |
| Absolute Diamond Ltd | Professional & scientific | 2021 |
| Absolute ERP Ltd | Information & communication | 2014 |
| Absolute Home Solutions Limited | Construction | 2006 |
| Absomendes Limited | Health & social care | 2019 |
| Abtr Ltd | Manufacturing | 2022 |
| Abundant Ventures Ltd. | Financial services | 2020 |
| Abundant Youth Beauty Ltd | Wholesale & retail | 2024 |
| ABX Distribution UK Ltd | Wholesale & retail | 2021 |
| Abyss Forge Co. Ltd | Wholesale & retail | 2025 |
| Abzag Ltd | Professional & scientific | 2013 |
| AC & C Aero Ltd | Manufacturing | 2017 |
| AC Boal Ltd | Financial services | 2015 |
| AC Tuning NFK Ltd | Wholesale & retail | 2026 |
| Ac-Ec Electrics Ltd | Construction | 2018 |
| Academie Francaise Ltd | Wholesale & retail | 2023 |
| Academy Financial Management Services Limited | Professional & scientific | 2015 |
| Academy of Facial Aesthetics by TMC Ltd | Other services | 2021 |
| Academy of Performing Arts Limited | Construction | 1998 |
| Academy of Robotics Limited | Information & communication | 2014 |
| Acathrive Limited | Information & communication | 2025 |
| ACB Digital Consulting Limited | Information & communication | 2015 |
| Acbuilding Builders and Contractors Ltd | Construction | 2022 |